CN118405078A - Trailer access state detection system, traction trailer and method - Google Patents
Trailer access state detection system, traction trailer and method Download PDFInfo
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- CN118405078A CN118405078A CN202410647790.6A CN202410647790A CN118405078A CN 118405078 A CN118405078 A CN 118405078A CN 202410647790 A CN202410647790 A CN 202410647790A CN 118405078 A CN118405078 A CN 118405078A
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- 238000001514 detection method Methods 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title abstract description 24
- 238000001914 filtration Methods 0.000 claims description 27
- 230000000087 stabilizing effect Effects 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 abstract description 15
- 230000002159 abnormal effect Effects 0.000 abstract description 8
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- 238000010586 diagram Methods 0.000 description 8
- 229910052736 halogen Inorganic materials 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/34—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction
- B60Q1/346—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction with automatic actuation
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Abstract
The invention relates to the technical field of vehicle theft prevention, and particularly discloses a trailer access state detection system, a traction trailer and a method. The trailer access state detection system comprises: the system comprises a controller, an access detection module and a trailer load; the first end of the access detection module is connected with the trailer load, and the second end of the access detection module is connected with the input end of the controller; the access detection module is used for transmitting the detection signal after the current limiting treatment to the trailer load, collecting the feedback signal of the trailer load and transmitting the feedback signal to the controller; and the controller is used for judging whether the trailer load is in an on-line state or not according to the amplitude of the feedback signal. By limiting the excessive detection current to enter the LED lamp of the trailer load, the abnormal lighting condition of the trailer in the steering process is avoided, and the device has a wider load detection range.
Description
Technical Field
The present invention relates to the field of vehicle detection technologies, and in particular, to a trailer access state detection system, a traction trailer, and a method.
Background
The steering lamps of the trailer configuration in the market at present mainly comprise halogen lamps, LED lamps and the like, the number of the configured steering lamps is quite different, and the power difference of the steering lamps of the trailer is quite different: the total power of 4 halogen lamps with the power of 21W is up to 84W; only 1 LED lamp with the power less than 1W is arranged on one side of each trailer, and the total power can be as low as 0.5W. The variety of the types and the power of the trailer steering lamps causes great difficulty in detecting the load of the trailer.
At present, a pull-up power supply is added to an MOS driving output end of a controller commonly used in the industry, and whether the trailer is offline or not is judged by detecting the voltage difference between a power supply pin and a driving output pin through an MOS chip. Because the performance of the MOS chip is limited, the resistance design of the pull-up and pull-down resistors is limited, and whether a trailer is offline or not is detected by adding a pull-up power supply, so that the LED lamp can be slightly lightened by the pull-up current when the trailer is connected with the LED lamp, and the unexpected turn lamp is lightened to transmit error signals to a coming vehicle at the rear side, thereby causing hidden danger of traffic accidents.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a trailer access state detection system, a traction trailer and a method, and aims to solve the technical problem that the trailer access state detection system in the prior art is easy to generate continuous false alarm in heavy rainy days.
To achieve the above object, the present invention provides a trailer access status detection system, which is characterized in that the trailer access status detection system is applied to a towing trailer, and includes: the system comprises a controller, an access detection module and a trailer load;
The first end of the access detection module is connected with the trailer load, and the second end of the access detection module is connected with the input end of the controller;
The access detection module is used for transmitting the detection signal after the current limiting treatment to the trailer load, collecting the feedback signal of the trailer load and transmitting the feedback signal to the controller;
And the controller is used for judging whether the trailer load is in an on-line state or not according to the amplitude of the feedback signal.
Optionally, the access detection module includes: a first resistor and a second resistor;
The first end of the first resistor is connected with a power supply, the second end of the first resistor is connected with the first end of the second resistor, the trailer load and the input end of the controller at the same time, and the second end of the second resistor is grounded.
Optionally, the trailer access state detection system further includes: a filtering unit;
The input end of the filtering unit is connected with the first end of the second resistor, and the output end of the filtering unit is connected with the input end of the controller;
The filtering unit is used for filtering the feedback signal and transmitting the feedback signal after the filtering to the controller.
Optionally, the filtering unit includes: a third resistor and a first capacitor;
the first end of the third resistor is connected with the first end of the second resistor, the second end of the third resistor is simultaneously connected with the first end of the first capacitor and the input end of the controller, and the second end of the first capacitor is grounded.
Optionally, the access state detection system further includes: a voltage stabilizing unit;
The input end of the voltage stabilizing unit is connected with the output end of the filtering unit, and the output end of the voltage stabilizing unit is connected with the input end of the controller;
the voltage stabilizing unit is used for carrying out voltage clamping processing on the feedback signal and transmitting the feedback signal after the voltage clamping processing to the controller.
Optionally, the trailer access state detection system further includes: a steering control switch and a driving module;
The steering control switch is connected with the control end of the controller, the input end of the driving module is connected with the output end of the controller, and the output end of the driving module is connected with the trailer load;
The controller is also used for judging the state of the steering control switch when the trailer load is in an on-line state, and sending a driving instruction to control the driving module to drive the trailer load when the steering control switch is in a closed state.
Optionally, the steering control switch includes: a left steering switch and a right steering switch;
The trailer load includes: a left turn light and a right turn light;
the driving module includes: a left turn signal drive sub-module and a right turn signal drive sub-module;
the access detection module comprises: a left steering detection sub-module and a right steering detection sub-module;
The controller is further used for judging whether the left steering lamp and the right steering lamp are in an on-line state or not according to the magnitudes of feedback signals respectively corresponding to the left steering detection sub-module and the right steering detection sub-module;
The controller is further configured to determine states of the left steering switch and the right steering switch when the left steering lamp and the right steering lamp are in an on-line state, and send a driving instruction to control the left steering lamp driving sub-module or the right steering lamp driving sub-module to drive the left steering lamp or the right steering lamp to be turned on when the left steering switch or the right steering switch is in an off state.
In addition, in order to achieve the above object, the invention also proposes a traction trailer comprising a trailer access status detection system as described above.
In addition, in order to achieve the above objective, the present invention further provides a trailer access state detection method, where the trailer access state detection method includes:
transmitting the detection signal after the current limiting treatment to a trailer load;
And collecting a feedback signal of the trailer load, and judging whether the trailer load is in an on-line state according to the magnitude of the feedback signal.
Optionally, when the trailer load is in an on-line state, judging the state of the steering control switch;
and driving the trailer load when the steering control switch is in a closed state.
The technical scheme of the invention provides a trailer access state detection system, a traction trailer and a method. The trailer access state detection system comprises: the system comprises a controller, an access detection module and a trailer load; the first end of the access detection module is connected with the trailer load, and the second end of the access detection module is connected with the input end of the controller; the access detection module is used for transmitting the detection signal after the current limiting treatment to the trailer load, collecting the feedback signal of the trailer load and transmitting the feedback signal to the controller; and the controller is used for judging whether the trailer load is in an on-line state or not according to the amplitude of the feedback signal. By limiting the excessive detection current to enter the LED lamp of the trailer load, the abnormal lighting condition of the trailer in the steering process is avoided, and the device has a wider load detection range.
Drawings
Fig. 1 is a schematic block diagram of a first embodiment of a trailer access status detection system according to the present invention;
FIG. 2 is a schematic block diagram of a second embodiment of a trailer-access status detection system according to the present invention;
FIG. 3 is a circuit diagram of a second embodiment of a trailer access status detection system according to the present invention;
FIG. 4 is a schematic block diagram of a third embodiment of a trailer-access status detection system according to the present invention;
fig. 5 is a flowchart of a first embodiment of a trailer access status detection method according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present invention.
Referring to fig. 1, fig. 1 is a schematic block diagram of a first embodiment of a trailer-access status detection system according to the present invention. A first embodiment of the trailer-access-condition detection system of the present invention is presented based on fig. 1.
In this embodiment, the trailer access state detection system includes: a controller 10, an access detection module 20 and a trailer load 30; the first end of the access detection module 20 is connected to the trailer load 30, and the second end of the access detection module 20 is connected to the input of the controller 10.
It should be noted that, the controller 10 may be an electronic module with signal transmission and Processing functions built using a microcontroller chip (Microcontroller Unit, MCU) or a digital signal Processing chip (DIGITAL SIGNAL Processing, DSP) or the like, so as to execute a program preset in the MCU or DSP. In this embodiment, an MCU chip loaded in the body controller (Body control module, BCM) may be selected.
Further, the access detection module 20 may be a functional module having both signal output and signal receiving capabilities, and the access detection module 20 may be configured to transmit the detection signal after the current limiting process to the trailer load 30, collect a feedback signal of the trailer load, and transmit the feedback signal to the controller; the controller 10 may be configured to determine whether the trailer load 30 is on-line based on the magnitude of the feedback signal.
The trailer load 30 may be an electrical power device arranged on a trailer of a towing trailer, for example: turn signal lamps (including LED lamps or halogen lamps, etc.).
The detection signal may be an electrical signal generated by the access detection module 20 for detecting a trailer load condition. The feedback signal may be an electrical signal received by the access detection module 20 by the trailer load 30 in response to the detection signal. Because the resistance states of the trailer load are different when the trailer load is connected and not connected, the amplitude of the feedback signal is different when the trailer load is on line and off line, and whether the trailer load 30 is in the on-line state can be judged according to the amplitude of the feedback signal.
It should be appreciated that the above-described current limiting process is a process of controlling the current value of the detection signal output from the access detection module 20 to the trailer load to be less than a preset current value. The preset current value may be a preset minimum current value for avoiding abnormal starting of the trailer load when the trailer turns (for example, the trailer is not turned and the turn signal lights are abnormally turned on). For example, the preset current value may be set to 0.12mA, and the detection signal generated by the access detection module 20 should always satisfy less than 0.12mA. The access detection module 20 may be maintained in an on state at this time to continuously detect whether the trailer load 30 is in an on-line state.
Further, the process of judging whether the trailer load 30 is in an on-line state may be that the trailer load 30 is not connected, i.e. is in an off-line state, when the amplitude of the collected feedback signal is higher than the preset amplitude by comparing the amplitude of the collected feedback signal with the preset amplitude preset in the controller; when the amplitude of the feedback signal is lower than the preset amplitude, it indicates that the trailer load 30 is connected, i.e. in an on-line state.
In this embodiment, the trailer access state detection system includes: the system comprises a controller, an access detection module and a trailer load; the first end of the access detection module is connected with the trailer load, and the second end of the access detection module is connected with the input end of the controller; the access detection module is used for transmitting the detection signal after the current limiting treatment to the trailer load, collecting the feedback signal of the trailer load and transmitting the feedback signal to the controller; and the controller is used for judging whether the trailer load is in an on-line state or not according to the amplitude of the feedback signal. By limiting the excessive detection current to enter the LED lamp of the trailer load, the abnormal lighting condition of the trailer in the steering process is avoided, and the device has a wider load detection range.
Referring to fig. 2 and 3, fig. 2 is a schematic block diagram of a second embodiment of a trailer access status detection system according to the present invention; fig. 3 is a circuit configuration diagram of a second embodiment of the trailer-access status detection system according to the present invention. A second embodiment of the trailer-access-condition detection system of the present invention is presented based on the first embodiment of the trailer-access-condition detection system described above.
In this embodiment, the access detection module includes: a first resistor R1 and a second resistor R2;
The first end of the first resistor R1 is connected with the power supply VCC, the second end of the first resistor R1 is simultaneously connected with the first end of the second resistor R2, the trailer load 30 and the input end of the controller 10, and the second end of the second resistor R2 is grounded.
It should be noted that, when the trailer load 30 is in an off-line state, that is, the connection (A1 in the drawing) between the first resistor R1 and the second resistor R2 is not loaded, the amplitude of the feedback signal collected by the input end (A2) of the controller 10 is the voltage division value on the second resistor R2 after the first resistor R1 is connected in series with the second resistor R2.
Further, when the trailer load 30 is in an on-line state, that is, a parallel load exists at the connection position (A1 in the figure) of the first resistor R1 and the second resistor R2, the amplitude of the feedback signal collected by the input end (A2) of the controller 10 is the voltage division value of the second resistor R2 and the trailer load 30 after the first resistor R1 is connected in series with the second resistor R2.
It should be noted that, since the voltage division value of the second resistor R2 after being connected in parallel with the trailer load 30 is reduced, the amplitude of the feedback signal of the trailer load 30 in the on-line state is lower than the preset amplitude, and the amplitude of the feedback signal of the trailer load 30 in the off-line state is higher than the preset amplitude.
It should be understood that the first resistor R1 may limit the detected current generated by the power supply, and the second resistor R2 may shunt the external load to reduce the current flowing to the external load, so that under multiple measures, the magnitude of the current flowing to the trailer load may be effectively limited, and the condition that the trailer is abnormally started under the condition that the trailer is on line when the trailer load state is detected may be prevented.
Further, the trailer access state detection system further includes: a filtering unit 40; an input end of the filtering unit 40 is connected to the first end of the second resistor R2, and an output end of the filtering unit 40 is connected to an input end of the controller 10.
It should be noted that the filtering unit 40 may be configured to perform filtering processing on the feedback signal, and transmit the feedback signal after the filtering processing to the controller.
Wherein the filtering unit 40 may include: a third resistor R3 and a first capacitor C1; the first end of the third resistor R3 is connected to the first end of the second resistor R2, the second end of the third resistor R3 is simultaneously connected to the first end of the first capacitor C1 and the input end of the controller 10, and the second end of the first capacitor C1 is grounded.
It should be appreciated that the third resistor R3 and the first capacitor C1 form an RC filter circuit, which can remove high frequency components and superimposed noise in the feedback signal, and can function as a smoothing signal. Meanwhile, the third resistor R3 also plays a role in limiting the feedback signal entering the input end of the controller.
Further, the access state detection system further includes: a voltage stabilizing unit 50; the input end of the voltage stabilizing unit 50 is connected with the output end of the filtering unit 40, and the output end of the voltage stabilizing unit 50 is connected with the input end of the controller 10;
it should be noted that the voltage stabilizing unit 50 may be configured to perform voltage clamping processing on the feedback signal, and transmit the feedback signal after the voltage clamping processing to the controller.
Wherein, the voltage stabilizing unit 50 may include: and the cathode of the zener diode D1 is connected with the second end of the third resistor, and the anode of the zener diode D1 is grounded. The voltage of the feedback signal entering the controller 10 is clamped and stabilized through the voltage clamping function of the zener diode D1, so that the pin burning condition caused by the overhigh amplitude of the feedback signal is avoided.
In this embodiment, by setting an access detection module composed of a first resistor and a second resistor, a detection signal is transmitted to a trailer load, a feedback signal is collected, and whether the trailer load is connected with the second resistor in parallel is determined according to the amplitude of the feedback signal, so as to determine the on-line state of the trailer load. The feedback signal is subjected to filtering processing through the setting filtering unit, the feedback signal after the filtering processing is transmitted to the controller, the accuracy and stability of feedback judgment are improved, the feedback signal is subjected to voltage clamping processing through the setting voltage stabilizing unit, and the feedback signal after the voltage clamping processing is transmitted to the controller. The pin burning condition caused by the overhigh feedback signal is avoided, and the operation life of the system is prolonged.
Referring to fig. 4, fig. 4 is a schematic block diagram of a third embodiment of a trailer-access status detection system according to the present invention. A third embodiment of the trailer-access-condition detection system of the present invention is presented based on the first embodiment of the trailer-access-condition detection system described above.
In this embodiment, the trailer access state detection system further includes: steering control switch and drive module. The steering control switch is connected with the control end of the controller, the input end of the driving module is connected with the output end of the controller, and the output end of the driving module is connected with the trailer load.
It should be noted that, the controller 10 may be further configured to determine the state of the steering control switch when the trailer load 30 is in an on-line state, and send a driving instruction to control the driving module to drive the trailer load 30 when the steering control switch is in a closed state.
It should be appreciated that the steering control switch may include a steering switch and a lane change switch, closing the steering control switch when the trailer is being towed in need of a turn light control, and the controller 10 generating a drive command to the drive module when it detects that the steering control switch is in a closed state. The driving module may be a functional module formed by a MOS chip and capable of driving the trailer load 30 to operate. An operation such as turning on of the lamp may be performed upon receiving the driving instruction.
Further, the steering control switch includes: a left steering switch and a right steering switch; the trailer load includes: a left turn light and a right turn light; the driving module includes: a left turn signal drive sub-module and a right turn signal drive sub-module; the access detection module comprises: a left steering detection sub-module and a right steering detection sub-module.
The controller 10 may be further configured to determine whether the left steering lamp and the right steering lamp are in an on-line state according to the magnitudes of feedback signals corresponding to the left steering detection sub-module and the right steering detection sub-module, respectively.
The controller is further configured to determine states of the left steering switch and the right steering switch when the left steering lamp and the right steering lamp are in an on-line state, and send a driving instruction to control the left steering lamp driving sub-module or the right steering lamp driving sub-module to drive the left steering lamp or the right steering lamp to be turned on when the left steering switch or the right steering switch is in an off state.
In this embodiment, a steering control switch and a driving module are further provided in the trailer access state detection system. The controller can judge the state of the steering control switch when the trailer load is in an on-line state, and send a driving instruction to control the driving module to drive the trailer load when the steering control switch is in a closed state. It is ensured that the traction trailer does not experience abnormal lighting of the trailer steering lamp.
In addition, the invention also provides a traction trailer. The towing trailer includes a trailer access condition detection system as described above.
Because the traction trailer adopts all the technical schemes of all the embodiments, the traction trailer at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted here.
In addition, the invention also provides a trailer access state detection method. Referring to fig. 5, fig. 5 is a flowchart illustrating a first embodiment of a trailer access status detection method according to the present invention. The trailer access state detection method is applied to the traction trailer, and in the embodiment, the trailer access state detection method comprises the following steps:
step S10: and transmitting the detection signal after the current limiting treatment to a trailer load.
It should be noted that, the execution body of the present embodiment may be a traction trailer loaded with the trailer access state detection system.
The detection signal may be an electrical signal for detecting a trailer load condition. The current limiting process is a process of controlling a current value of a detection signal output to the trailer load to be smaller than a preset current value.
It should be appreciated that the preset current value may be a preset minimum current value that avoids abnormal starting of the trailer load when the trailer is turned (e.g., the trailer is not turned and the turn signal is abnormally turned on). For example, the preset current value may be set to 0.12mA, and the detection signal should always satisfy less than 0.12mA.
Step S20: and collecting a feedback signal of the trailer load, and judging whether the trailer load is in an on-line state according to the magnitude of the feedback signal.
It should be noted that the feedback signal may be an electrical signal generated by the trailer load in response to the detection signal. Because the resistance states of the trailer load are different when the trailer load is connected and not connected, the amplitude of the feedback signal is different when the trailer load is on line and off line, and whether the trailer load is in an on-line state can be judged according to the amplitude of the feedback signal.
It should be understood that when the amplitude of the feedback signal is higher than the preset amplitude, it indicates that the trailer load is not connected at this time, i.e. is in an off-line state; and when the amplitude of the collected feedback signal is lower than the preset amplitude, indicating that the trailer load is connected, namely in an on-line state.
Further, the step S20 further includes:
Step S30: and when the trailer load is in an on-line state, judging the state of the steering control switch.
The steering control switch may include a steering switch and a lane change switch, and is turned off when the trailer is towed and the steering lamp is required to be controlled.
Step S40: and driving the trailer load when the steering control switch is in a closed state.
When the steering control switch is detected to be in a closed state, a driving instruction is generated and sent to a functional module which is formed by an MOS chip and can drive a trailer load to operate. An operation such as turning on of the lamp may be performed upon receiving the driving instruction.
In this embodiment, the detection signal after the current limiting process is transmitted to the trailer load; and collecting a feedback signal of the trailer load, and judging whether the trailer load is in an on-line state according to the magnitude of the feedback signal. Judging the state of a steering control switch when the trailer load is in an on-line state; and driving the trailer load when the steering control switch is in a closed state. By limiting the excessive detection current to enter the LED lamp of the trailer load, the abnormal lighting condition of the trailer in the steering process is avoided, and the device has a wider load detection range. And can ensure that the traction trailer does not have abnormal lighting of the trailer steering lamp.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A trailer-access-condition detection system, wherein the trailer-access-condition detection system is applied to a towing trailer, comprising: the system comprises a controller, an access detection module and a trailer load;
The first end of the access detection module is connected with the trailer load, and the second end of the access detection module is connected with the input end of the controller;
The access detection module is used for transmitting the detection signal after the current limiting treatment to the trailer load, collecting the feedback signal of the trailer load and transmitting the feedback signal to the controller;
And the controller is used for judging whether the trailer load is in an on-line state or not according to the amplitude of the feedback signal.
2. The trailer access status detection system of claim 1 wherein the access detection module comprises: a first resistor and a second resistor;
The first end of the first resistor is connected with a power supply, the second end of the first resistor is connected with the first end of the second resistor, the trailer load and the input end of the controller at the same time, and the second end of the second resistor is grounded.
3. The trailer-access-condition detection system of claim 2, wherein the trailer-access-condition detection system further comprises: a filtering unit;
The input end of the filtering unit is connected with the first end of the second resistor, and the output end of the filtering unit is connected with the input end of the controller;
The filtering unit is used for filtering the feedback signal and transmitting the feedback signal after the filtering to the controller.
4. The trailer-access-condition detection system of claim 3, wherein the filtering unit comprises: a third resistor and a first capacitor;
the first end of the third resistor is connected with the first end of the second resistor, the second end of the third resistor is simultaneously connected with the first end of the first capacitor and the input end of the controller, and the second end of the first capacitor is grounded.
5. The trailer access status detection system of claim 4, wherein the access status detection system further comprises: a voltage stabilizing unit;
The input end of the voltage stabilizing unit is connected with the output end of the filtering unit, and the output end of the voltage stabilizing unit is connected with the input end of the controller;
the voltage stabilizing unit is used for carrying out voltage clamping processing on the feedback signal and transmitting the feedback signal after the voltage clamping processing to the controller.
6. The trailer-access-condition detection system of claim 1, further comprising: a steering control switch and a driving module;
The steering control switch is connected with the control end of the controller, the input end of the driving module is connected with the output end of the controller, and the output end of the driving module is connected with the trailer load;
The controller is also used for judging the state of the steering control switch when the trailer load is in an on-line state, and sending a driving instruction to control the driving module to drive the trailer load when the steering control switch is in a closed state.
7. The trailer-access-condition detection system of claim 6, wherein the steering control switch comprises: a left steering switch and a right steering switch;
The trailer load includes: a left turn light and a right turn light;
the driving module includes: a left turn signal drive sub-module and a right turn signal drive sub-module;
the access detection module comprises: a left steering detection sub-module and a right steering detection sub-module;
The controller is further used for judging whether the left steering lamp and the right steering lamp are in an on-line state or not according to the magnitudes of feedback signals respectively corresponding to the left steering detection sub-module and the right steering detection sub-module;
The controller is further configured to determine states of the left steering switch and the right steering switch when the left steering lamp and the right steering lamp are in an on-line state, and send a driving instruction to control the left steering lamp driving sub-module or the right steering lamp driving sub-module to drive the left steering lamp or the right steering lamp to be turned on when the left steering switch or the right steering switch is in an off state.
8. A traction trailer comprising a trailer access status detection system as claimed in any one of claims 1-7.
9. A trailer-in-condition detection method, wherein the trailer-in-condition detection method is applied to a towing trailer as in claim 8, the trailer-in-condition detection method comprising:
transmitting the detection signal after the current limiting treatment to a trailer load;
And collecting a feedback signal of the trailer load, and judging whether the trailer load is in an on-line state according to the magnitude of the feedback signal.
10. The trailer-access-condition detection method as recited in claim 9, wherein after said step of collecting a feedback signal of said trailer load and determining whether said trailer load is in an on-line condition based on a magnitude of said feedback signal, further comprises:
Judging the state of a steering control switch when the trailer load is in an on-line state;
and driving the trailer load when the steering control switch is in a closed state.
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| CN202410647790.6A CN118405078A (en) | 2024-05-23 | 2024-05-23 | Trailer access state detection system, traction trailer and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119953293A (en) * | 2024-12-25 | 2025-05-09 | 比亚迪股份有限公司 | Tractor and trailer connection status detection circuit and trailer vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119953293A (en) * | 2024-12-25 | 2025-05-09 | 比亚迪股份有限公司 | Tractor and trailer connection status detection circuit and trailer vehicle |
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