JP2004276802A - Anti-theft device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-theft device capable of elongating a life of a power source battery of a portable machine. <P>SOLUTION: This anti-theft device is provided with an abnormality detector 3 for detecting abnormality of a vehicle in order to receive a signal from the abnormality detector 3 and monitoring conditions of the vehicle, an on-vehicle unit 1 for intermittently transmitting a signal and transmitting a warning signal rapidly to the portable machine 2 when the abnormality is detected, and the portable machine 2 for receiving the transmitted signal from the on-vehicle unit 1 and warning a user when the transmitted signal is the warning signal. The portable machine 2 includes the power source battery 25 inside thereof. A time circuit 14 for obtaining time information is provided in the on-vehicle unit 1, and intervals for transmitting and receiving are varied between day and night. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention belongs to the technical field of an anti-theft device that suppresses current consumption of a portable device that receives a notification from a vehicle side when an abnormality is detected and notifies the user of the abnormality.
[0002]
[Prior art]
2. Description of the Related Art In a conventional anti-theft device, current consumption of a portable device is suppressed by intermittent reception by the portable device, and the life of a battery serving as a power source is extended (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-11-20616 (pages 2-4, FIG. 5)
[0004]
[Problems to be solved by the invention]
However, the conventional anti-theft device is not sufficient for extending the life of a power supply battery required for a portable device.
[0005]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an anti-theft device capable of extending the life of a power supply battery of a portable device.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, abnormality detection means for detecting an abnormality of a vehicle is provided, a signal is received from the abnormality detection means to monitor a state of the vehicle, a signal is intermittently transmitted, and An in-vehicle unit that immediately transmits an alarm signal to the portable device when an abnormality is detected is provided, and a portable device that receives a transmission signal from the in-vehicle unit and alerts a user in the case of an alarm signal is provided. In the anti-theft device having an internal power supply, a time detecting means for obtaining time information is provided in the on-vehicle unit, and the interval between transmission and reception is changed between day and night.
[0007]
According to the second aspect of the present invention, the daytime transmission interval of the on-vehicle unit is made longer than at night, and the on-vehicle unit transmits a day / night switching signal to the portable device to switch the day / night mode of the portable device. The receiving interval is longer than at night.
[0008]
According to a third aspect of the present invention, there is provided means for providing a security alarm for notifying the periphery of the vehicle that an abnormality has been detected, and sounding the security alarm only when an abnormality is detected in the daytime.
[0009]
According to a fourth aspect of the present invention, the time information is periodically transmitted from the vehicle-mounted unit to the portable device to synchronize transmission and reception timings.
[0010]
Function and Effect of the Invention
According to the first aspect of the present invention, the time interval between the intermittent transmission and the intermittent reception of the portable unit is changed between day and night by the time detecting means provided in the on-vehicle unit, so that the time interval is set to an appropriate time interval. Thus, the power consumption of the portable device can be suppressed and the life of the power supply battery of the portable device can be extended. Therefore, it is possible to reduce the trouble of replacing and charging the power battery, to make it easier to use, and to prevent the power from being turned off when necessary, and to use the battery with more peace of mind.
[0011]
According to the second aspect of the present invention, the power transmission is reduced by increasing the transmission interval of the on-vehicle unit and the reception interval of the portable device longer in the daytime when theft is less likely to occur, thereby reducing the current consumption of the portable device. The life of the power battery can be extended.
[0012]
According to the third aspect of the invention, when an abnormality is detected during the day, a security alarm is sounded. Even if the security alarm sounds in the daytime, it is possible to notify the surrounding people that the abnormality has been detected with a low degree of trouble to the surroundings. Further, at night, the security alarm is not sounded so that the user can use the device without disturbing others.
[0013]
According to the fourth aspect of the present invention, time information is periodically transmitted from the vehicle-mounted unit to the portable device to synchronize transmission / reception timing, so that transmission / reception can be reliably performed even if the interval between intermittent transmission and reception is lengthened. be able to.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment for realizing the anti-theft device of the present invention will be described based on an embodiment corresponding to the invention according to claims 1, 2, 3, and 4.
[0015]
(Example)
[0016]
First, the configuration will be described.
FIG. 1 is a block diagram of an in-vehicle unit of the anti-theft device according to the embodiment. FIG. 2 is a block diagram of a portable device of the anti-theft device according to the embodiment. FIG. 3 is an explanatory diagram showing day and night transmission and reception timings of the antitheft device of the embodiment. FIG. 4 is a flowchart illustrating a flow of a process related to an alarm in the control unit of the vehicle-mounted unit of the antitheft device according to the embodiment. FIG. 5 is a flowchart illustrating a flow of a process of periodic transmission of the vehicle-mounted unit according to the embodiment. FIG. 6 is a flowchart illustrating a flow of a process of periodic reception of the portable device of the antitheft device of the embodiment. 1 and 2, a reference numeral 1 denotes an on-vehicle unit, a reference numeral 11 denotes a microcomputer, a reference numeral 12 denotes a transmission circuit, a reference numeral 13 denotes an antenna, a reference numeral 14 denotes a clock circuit (time detecting means), a reference numeral 2 denotes a portable device, a reference numeral 21 denotes a microcomputer, and a reference numeral 22 denotes a microcomputer. A receiving circuit, 23 is an antenna, 24 is a display, 25 is a power battery, 26 is an alarm, 3 is an abnormality detector (abnormality detection means), and 4 is a security alarm.
[0017]
In this embodiment, a vehicle unit of the anti-theft device is mounted on a vehicle. The in-vehicle unit 1 is provided with a transmission circuit 12 for transmitting a signal to the portable device 2 to be held by a user and an antenna 13, a clock circuit for measuring time, and a microcomputer 11 for controlling these. Provide. This vehicle is provided with an abnormality detector 3. The abnormality detector 3 according to the present embodiment detects that a door is locked or opened without authentication, and emits a signal when an abnormality is detected. Further, this vehicle is provided with a security alarm 4 for notifying the surroundings by sound when an abnormality is detected. For the security alarm 4, the horn of the vehicle may be used as the security alarm 4 to reduce the cost, or another horn may be provided.
The abnormality detector 3 and the security alarm 4 provided on the vehicle are connected to the microcomputer 11 of the vehicle-mounted unit 1.
[0018]
Next, the portable device 2 possessed by the user is provided with a receiving circuit 22 and an antenna 23 for receiving a signal from the in-vehicle unit 1, and a display 24 for notifying the user of the presence or absence of an alarm, An alarm 26 is provided for notifying a person who uses the apparatus at the time of abnormality detection by sound, and a microcomputer 21 for controlling the alarm is provided. The portable device 2 is provided with a power supply battery 25.
[0019]
Next, the operation will be described.
[0020]
[Control of abnormality monitoring in in-vehicle unit 1]
FIG. 4 is a flowchart showing the flow of the abnormality monitoring process executed by the microcomputer 11 of the vehicle-mounted unit 1 of the antitheft device of the embodiment. Each step will be described below.
[0021]
In step S11, the process is started.
[0022]
In step S12, it is determined whether or not the user is in the abnormality monitoring mode by setting or operation of the user. If the user is in the abnormality monitoring mode, the process proceeds to step S13. If not, the process proceeds to step S17. Move to
[0023]
In step S13, it is determined by the abnormality detector 3 whether the door lock or the door has been opened by an illegal operation. If the door lock or the door has been opened illegally, the process proceeds to step S14, where the door lock or the door has been illegally opened. If is not opened, the process proceeds to step S17.
[0024]
In step S14, it is determined whether it is daytime or nighttime based on time information from the clock circuit. If it is daytime, the process proceeds to step S15, and if it is nighttime, the process proceeds to step S16.
[0025]
In step S15, the security alarm 4 is activated to emit an alarm sound.
[0026]
In step S16, a warning signal is transmitted to the portable device 2 by the transmission circuit 12 and the antenna 13.
[0027]
In step S17, the process returns.
[0028]
[Control of Day / Night Mode in In-Vehicle Unit 1]
FIG. 5 is a flowchart showing the flow of day / night mode processing executed by the microcomputer 11 of the vehicle-mounted unit 1 of the antitheft device of the embodiment. Each step will be described below.
[0029]
In step S21, the process is started.
[0030]
In step S22, it is determined whether it is daytime or nighttime based on the time information of the clock circuit. If it is daytime, the process proceeds to step S23, and if it is nighttime, the process proceeds to step S25.
[0031]
In step S23, as shown in FIG. 3B, the ON time of the intermittent transmission time is set to t1 shorter than t2, and the OFF time is set to T1 longer than T2.
[0032]
In step S24, a signal in which the setting is set to the day mode is transmitted to the portable device 2.
[0033]
In step S25, as shown in FIG. 3A, the ON time of the intermittent transmission time is set to t2 longer than t1, and the OFF time is set to T2 shorter than T1.
[0034]
In step S26, a signal in which the setting is set to the night mode is transmitted to the portable device 2.
[0035]
In step S27, the process returns.
[0036]
[Control of day / night mode in portable device]
FIG. 6 is a flowchart showing the flow of the day / night mode process executed by the microcomputer 21 of the portable device 2 of the antitheft device of the embodiment. Each step will be described below.
[0037]
In step S31, the process is started.
[0038]
In step S32, it is determined whether or not a signal set for daytime has been received. If it has been received, the process proceeds to step S33, and if not received, the process proceeds to step S34.
[0039]
In step S33, the intermittent reception interval, that is, the OFF time is changed to T′1 longer than T′2.
[0040]
In step S34, it is determined whether a signal set at night has been received, and if received, the process proceeds to step S35, and if not received, the process proceeds to step S36.
[0041]
In step S35, the intermittent reception interval, that is, the OFF time is changed to T'2 shorter than T'1.
[0042]
In step S36, the process returns.
[0043]
[Daytime power saving]
The microcomputer 11 of the in-vehicle unit 1 determines whether it is daytime in step S22 based on the time information from the clock circuit. During the day, people are more susceptible to being stolen than at night due to the fact that people who try to open the door illegally and enter the vehicle are easily seen by people. For this reason, when it is daytime, as shown in FIG. 3B, the ON time of the transmission signal is made shorter than at night and the transmission signal interval, that is, the OFF time, is made longer than at night. As a result, current consumption in the vehicle-mounted unit 1 can be suppressed.
[0044]
Further, the in-vehicle unit 1 periodically transmits the daytime settings to the portable device 2 in step S24. When the portable device 2 receives the daytime setting, the reception interval, that is, the OFF time is set longer than at night as shown in FIG. Thereby, the current consumption of the power supply battery 25 of the portable device 2 can be suppressed.
[0045]
[Synchronization of transmission and reception]
The transmission of the day / night setting from the vehicle-mounted unit 1 to the portable device 2 performed in step S24 and step S26 is performed periodically. This periodic transmission includes time information. As a result, as shown in FIG. 3, the transmitted and received signals are synchronized both in the daytime and at night.
[0046]
[Consideration of surroundings]
If an unauthorized door lock or door opening is detected, the in-vehicle unit 1 determines whether it is daytime in step S14, and activates the security alarm 4 only in the daytime. Those who perform an unauthorized operation in the daytime will be more likely to be noticed by the surrounding people, and can warn the user to stop the unauthorized operation.
[0047]
On the other hand, if it is determined that the nighttime is determined by the determination in step S14, the security alarm 4 is not activated even if an abnormality is detected, and consideration is given to the surroundings, and trouble is given to the surroundings in the case of a malfunction. Make sure you don't have to.
[0048]
In the anti-theft device of the embodiment, the following effects can be obtained.
[0049]
(1) Provide an abnormality detector 3 for detecting an abnormality of the vehicle, obtain a signal from the abnormality detector 3, monitor the state of the vehicle, transmit a signal intermittently, and immediately issue an alarm signal when an abnormality is detected. Is provided to the portable device 2, and the portable device 2 is provided for receiving a transmission signal from the in-vehicle unit 1 and alerting a user in the case of an alarm signal. 25, the time circuit 14 for obtaining time information is provided in the in-vehicle unit 1 so that the transmission and reception intervals are changed between day and night, so that the current consumption of the portable device 2 during the day is suppressed. Thus, the life of the power supply battery 25 of the portable device 2 can be extended. Therefore, the trouble of replacing and charging the power supply battery 25 can be reduced, the power supply battery 25 can be used more easily, and the power supply can be prevented from being turned off when necessary.
[0050]
(2) The daytime transmission interval of the in-vehicle unit 1 is set to be longer than the night time, and the in-vehicle unit 1 transmits a day / night switching signal to the portable device 2 so as to switch the day / night mode of the portable device 2. Since the reception interval is longer than at night, power can be saved during the day when theft does not easily occur, current consumption of the portable device 2 can be suppressed, and the life of the power supply battery 25 of the portable device 2 can be extended.
[0051]
(3) A security alarm 4 for notifying the surroundings of the vehicle that an abnormality has been detected is provided, and the security alarm 4 is sounded only when an abnormality is detected in the daytime. I can let you know. Further, at night, the security alarm 4 is not sounded so that the user can use it without disturbing the surroundings.
[0052]
(4) Since time information is periodically transmitted from the vehicle-mounted unit 1 to the portable device 2 to synchronize transmission and reception timing, transmission and reception can be performed reliably.
[0053]
As described above, the anti-theft device of the present invention has been described based on the embodiments. However, the specific configuration is not limited to these embodiments, and the gist of the invention according to each claim in the claims is described. Changes and additions to the design are permitted as long as they do not deviate.
[0054]
For example, in the embodiment, the door lock or the door is detected as being opened without authentication as the abnormality detection means.However, it is detected that the engine has been started without authentication, the contact with the door knob has been detected, or the like. The operation of the in-vehicle device may be detected.
[Brief description of the drawings]
FIG. 1 is a block diagram of a vehicle-mounted unit of an anti-theft device according to an embodiment.
FIG. 2 is a block diagram of a portable device of the anti-theft device according to the embodiment;
FIG. 3 is an explanatory diagram showing transmission and reception timings of the antitheft device of the embodiment during the day and night.
FIG. 4 is a flowchart illustrating a flow of a process related to an alarm in a control unit of a vehicle-mounted unit of the anti-theft device according to the embodiment.
FIG. 5 is a flowchart illustrating a flow of a process of periodic transmission of the vehicle-mounted unit according to the embodiment.
FIG. 6 is a flowchart illustrating a flow of a process of periodic reception of the portable device of the anti-theft device according to the embodiment;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 In-vehicle unit 11 Microcomputer 12 Transmission circuit 13 Antenna 14 Clock circuit 2 Portable device 21 Microcomputer 22 Receiving circuit 23 Antenna 24 Display 25 Power battery 26 Alarm 3 Abnormality detector 4 Security alarm

Claims (4)

An abnormality detection means for detecting an abnormality of the vehicle is provided, a state of the vehicle is monitored by obtaining a signal from the abnormality detection means, an intermittent signal is transmitted, and an alarm signal is immediately transmitted to the portable device when an abnormality is detected. In a theft prevention device in which a vehicle-mounted unit for transmitting is provided, a portable device for receiving a transmission signal from the vehicle-mounted unit and alerting a user in the case of an alarm signal is provided, and the portable device has an internal power supply. ,
An anti-theft device, wherein a time detecting means for obtaining time information is provided in the on-vehicle unit, and an interval between transmission and reception is changed between day and night. The anti-theft device according to claim 1,
The daytime transmission interval of the in-vehicle unit is longer than at night, the in-vehicle unit transmits a day / night switching signal to the portable device to switch the day / night mode of the portable device, and the daytime reception interval of the portable device is longer than at night. An anti-theft device characterized by that: In the anti-theft device according to claim 1 or 2,
An anti-theft device comprising a security alarm for notifying the periphery of a vehicle that an abnormality has been detected, and sounding the security alarm only when an abnormality is detected in the daytime. In the anti-theft device according to claim 2 or 3,
An anti-theft device wherein time information is periodically transmitted from an in-vehicle unit to a portable device to synchronize transmission / reception timing.

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