CN106253943A - Sensor acquisition device based on LoRa technology, network system and communication means - Google Patents

Abstract

The present invention provides a sensor collector based on LoRa technology, which is used for wireless connection with a concentrator component, the concentrator component includes a concentrator and a first LoRa wireless module connected to the concentrator, and the sensor collector includes a processor And the data acquisition functional unit connected with the processor, the second LoRa wireless module, the second timer, the first LoRa wireless module in the concentrator assembly and the second LoRa wireless module in the sensor collector are connected by wireless communication. The present invention also provides a wireless sensor acquisition network system based on LoRa technology and a communication method of the wireless sensor acquisition network based on LoRa technology. The present invention realizes the characteristics of sensor field collection, low power consumption and unattended through the optimized configuration of communication nodes and time strategy.

Description

Sensor collector, network system and communication method based on LoRa technology

technical field

The invention relates to the field of measurement technology, in particular to a sensor collector, network system and communication method based on LoRa technology.

Background technique

LoRa technology is a wireless communication technology based on spread spectrum modulation technology. It has the characteristics of long transmission distance, low transmission power consumption, and strong anti-interference. It has been gradually promoted and applied in fields such as environmental monitoring and industrial control. In order to reduce the energy consumption of communication nodes, the nodes will sleep and work alternately in the cycle. There are many studies on low power consumption of nodes, but there is no low power solution for the cooperation between LoRa wireless modules and sensor collectors.

Contents of the invention

The purpose of the implementation of the present invention is to provide a sensor collector, network system and communication method based on LoRa technology. Through the optimal configuration of communication nodes and time strategies, the characteristics of sensor field collection, low power consumption, and unattended are realized.

A sensor collector for wireless connection with concentrator components, said concentrator components comprising a concentrator and a first LoRa wireless module connected to the concentrator, characterized in that: said sensor collector includes a processor and processing The data acquisition functional unit connected to the concentrator, the second LoRa wireless module, the second timer, the first LoRa wireless module in the concentrator assembly and the second LoRa wireless module in the sensor collector are connected by wireless communication;

The second LoRa wireless module is used to wake up after receiving the wake-up data packet of the concentrator, after receiving the communication data packet, wake up the processor, transmit the data packet to the processor, power off the second LoRa wireless module, wake up The data packet includes the wake-up signal to wake up the specified sensor collector and the time stamp of the data packet used for time synchronization. The communication data packet includes the command to collect sensor data and the time when the data packet returns;

The processor wakes up after receiving the interrupt signal of the second timer, the second timer continues to count, and turns on the second LoRa wireless module, and sends the collected data or feedback instructions to the concentrator in a data packet;

The data collection function unit is used to collect sensor data according to the instruction for collecting sensor data analyzed by the processor. After the data collection is completed, the processor is woken up by an interrupt, and the data collection function unit is powered off.

A wireless sensor acquisition network system based on LoRa technology, comprising a concentrator component and a plurality of sensor collectors connected with the concentrator component, the concentrator component includes a concentrator and the first LoRa wireless module connected with the concentrator, each The sensor collector includes a processor and a data acquisition functional unit connected to the processor, a second LoRa wireless module, and a second timer. The first LoRa wireless module in the concentrator component is connected to the second LoRa wireless module in the sensor collector. Wireless communication connection, characterized in that:

The concentrator is used to determine the data packets sent to the sensor collector according to the received data server instructions, and then start sending data packets to the sensor collectors in the network one by one through the first LoRa wireless module, and the data packets include wake-up data packets and a communication data packet, wherein the wake-up data packet includes a wake-up signal to wake up a specified sensor collector and a data packet time stamp for time synchronization, and the communication data packet includes a command to collect sensor data and the time when the data packet returns;

The concentrator is also used to receive and process data from the sensor collector;

The first LoRa wireless module is also used to return the data of the sensor collector processed by the concentrator to the data server;

The processor is used to reset the second timer to zero after being woken up by the interrupt signal of the second timer, start a cycle of timing, and open the second LoRa wireless module of the node at the same time, so that the second LoRa wireless module can be turned off from the off state. The power state changes to the dormant state, the processor enters the dormant state, wakes up after receiving the data packet sent by the second LoRa wireless module, synchronizes the time with the concentrator through the time stamp of the data packet, and sets the second timing according to the reply time of the concentrator If the instruction of the communication data packet is an instruction to collect sensor data, the data collection function unit is powered on, the processor enters a dormant state, and the data collection function unit starts to collect sensor data. After the data collection is completed, the processor is awakened by an interrupt, and the data collection The functional unit is powered off, the processor saves the collected sensor data, and enters the dormant state; if the communication data packet is a configuration information modification instruction, the processor enters the dormant state after processing;

The second LoRa wireless module is used to wake up after receiving the wake-up data packet of the concentrator, after receiving the communication data packet, wake up the processor, transmit the data packet to the processor, and the second LoRa wireless module is powered off;

The processor wakes up after receiving the interrupt signal of the second timer, the second timer continues timing, and opens the second LoRa wireless module, and the collected data or feedback instructions form a data packet and send it to the concentrator;

The data collection function unit is used to collect sensor data according to the instruction for collecting sensor data analyzed by the processor. After the data collection is completed, the processor is woken up by an interrupt, and the data collection function unit is powered off.

Further, the concentrator component also includes a first timer connected to the concentrator, and the concentrator clears the first timer after receiving the interrupt trigger signal of the first timer, and starts a period of timing according to the determined window time.

A communication method of a wireless sensor acquisition network based on LoRa technology, which is applied in a wireless sensor acquisition network based on LoRa technology, wherein the wireless sensor acquisition network uses a concentrator component and a star network connection of a plurality of sensor collectors, The sensor collector includes a processor and a data acquisition functional unit connected to the processor, a second LoRa wireless module, a second timer, and the second LoRa wireless module of the concentrator component and each sensor collector is wirelessly connected, and is characterized in that The method comprises the steps of:

Step 1, after the processor of the sensor collector is woken up by the interrupt signal of the second timer, the second timer is cleared to start a period of timing;

Step 2: After the processor turns on the second LoRa wireless module of the node, the second LoRa wireless module changes from a power-off state to a dormant state, and the processor enters a dormant state;

Step 3, the second LoRa wireless module waits to receive the wake-up data packet of the concentrator, wakes up after receiving the wake-up data packet belonging to the second LoRa wireless module, and wakes up the processor after receiving the communication data packet, and transmits the data packet to The processor, the second LoRa wireless module is powered off, wherein the wake-up data packet includes a wake-up signal to wake up the specified sensor collector and a data packet time stamp for time synchronization, and the communication data packet includes a command that needs to collect sensor data and a data packet return time;

Step 4, the processor parses the received data packet, synchronizes the time with the concentrator through the data packet timestamp, and sets the second timer according to the time of replying to the concentrator; if the instruction of the communication data packet is an instruction to collect sensor data, use The data acquisition function unit is powered on, the processor enters a sleep state, and the data acquisition function unit starts to collect sensor data. After the data acquisition is completed, the processor is awakened by an interrupt, and the data acquisition function unit is powered off. After the processor saves the collected sensor data, it enters sleep mode. state; if the communication data packet is a configuration information modification instruction, the processor will enter the dormant state after processing.

Step 5, the sensor collector wakes up after receiving the interrupt signal of the second timer, the second timer continues timing, and turns on the second LoRa wireless module, and sends the collected data or feedback instructions to form a data packet to the concentrator;

Step 6: The processor enters the dormant state, and the second LoRa wireless module is powered off.

In order to solve the problem of communication and low power consumption of the sensor collector, the present invention not only utilizes the low power consumption and high reliability characteristics of the second LoRa wireless module in the sensor collector, but also cooperates with the processor and the data acquisition functional unit, By switching between the three states of power-off, sleep, and work, the power consumption of each sensor collector is reduced, so that each functional module is in a power-off or sleep state when it is not in use. Under the condition of ensuring reliability, Achieve low power consumption for wireless sensors.

Description of drawings

Fig. 1 is the network architecture schematic diagram of the wireless sensor acquisition network based on LoRa technology of the present invention;

Fig. 2 is the circuit structural representation of concentrator and sensor collector among the present invention;

Fig. 3 is the working, power-off and dormancy sequence diagram of concentrator and sensor collector in the present invention, and the thickest solid line part in the figure represents working state, common solid line part represents dormancy state, and the thinnest solid line part represents power-off state.

In the figure: 1—concentrator component, 11—concentrator, 12—the first LoRa wireless module, 13—the first timer, 2—sensor collector, 21—processor, 22—data acquisition functional unit, 23—the first Two LoRa wireless modules, 24—the second timer.

detailed description

The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

Fig. 1 shows the schematic diagram of the network architecture of the wireless sensor acquisition network based on LoRa technology in the present invention. The concentrator is used as the control end of the entire acquisition network. Formal network connection, the concentrator component and each sensor collector adopt LoRa wireless module for wireless connection.

As shown in FIG. 2 , the concentrator component 1 in the network includes a concentrator 11 and a first LoRa wireless module 12 and a first timer 13 connected to the concentrator 11 . Each sensor collector 2 includes a processor 21 and a data acquisition functional unit 22 connected to the processor 21, a second LoRa wireless module 23, a second timer 24, the first LoRa wireless module 12 and the sensor in the concentrator assembly 1 The second LoRa wireless module 23 in the collector 2 performs wireless communication connection to realize the communication connection between the concentrator component 1 and the sensor collector 2 .

The concentrator assembly 1, as the control end of the entire collection network, is not within the scope of low power consumption. The method realized by the present invention is to solve the communication and low power consumption problems of the sensor collector 2, not only utilizing the second sensor collector 2 The LoRa wireless module 23 has the characteristics of low power consumption and high reliability, and by cooperating with the processor 21 and the data acquisition function unit 22, through the switching of the three states of power-off, sleep, and work, it reduces the cost of each sensor collector. Low power consumption, so that each functional module is in a power-off or dormant state when not in use, and realizes low power consumption of wireless sensors under the condition of ensuring reliability.

After the concentrator 11 receives the first timer 13 interrupt trigger signal, the first timer 13 is cleared, and starts a period of timing according to the determined window time;

The concentrator 11 determines the data packets sent to the sensor collector 2 according to the received data server instructions, and then starts to send data packets to the sensor collectors 2 in the network one by one through the first LoRa wireless module 12, and the data packets include wake-up data. packet and communication data packet, wherein the wake-up data packet includes a wake-up signal to wake up the specified sensor collector 2 and a data packet time stamp for time synchronization, and the communication data packet includes the command for collecting sensor data and the time when the data packet returns; the data After all the packets have been sent, the first LoRa wireless module 12 waits to receive the data packet that the sensor collector 2 replies;

After receiving the data from the sensor collector 2, the concentrator 11 processes the received data packets, communicates with the data server, and returns the required data.

Please further refer to Fig. 3, the communication method of the wireless sensor collection network based on LoRa technology comprises the steps:

Step 1, after the processor 21 of the sensor collector 2 is awakened by the interrupt signal of the second timer 24, the second timer 24 is cleared to zero, and a period of timing is started;

Step 2, after the processor 21 opens the second LoRa wireless module 23 of this node, the second LoRa wireless module 23 is changed from the power-off state to the dormant state, and the processor 21 enters the dormant state;

Step 3, the second LoRa wireless module 23 waits to receive the wake-up data packet of the concentrator 11, wakes up after receiving the wake-up data packet belonging to the second LoRa wireless module 23, and wakes up the processor 21 after receiving the communication data packet. The data packet is transmitted to the processor 21, and the second LoRa wireless module 23 is powered off, wherein the wake-up data packet includes a wake-up signal to wake up the specified sensor collector 2 and a data packet time stamp for time synchronization, and the communication data packet includes the sensor that needs to be collected. The command of the data and the time when the data packet is returned;

Step 4, the processor 21 parses the received data packet, aligns the time with the concentrator 11 by the data packet time stamp, and sets the second timer 24 according to the time of replying to the concentrator 11; if the instruction of the communication data packet is to collect sensor data instruction, the data acquisition functional unit 22 is powered on, the processor 21 enters a dormant state, the data acquisition functional unit 22 starts to collect sensor data, after the data acquisition is completed, the processor 21 is awakened by an interrupt, the data acquisition functional unit 22 is powered off, and the processor 21 enters the dormant state after saving the collected sensor data; if the communication data packet is a configuration information modification instruction, the processor 21 processes it and enters the dormant state.

Step five, the sensor collector 2 wakes up after receiving the interrupt signal of the second timer 24, the second timer 24 continues timing, and opens the second LoRa wireless module 23, and sends the collected data or feedback instructions to form a data packet to concentrator 11;

Step 6, the processor 21 enters the dormant state, the second LoRa wireless module 23 is powered off, and returns to step 1.

If the second LoRa wireless module 23 has not received the wake-up packet in this cycle, it is in a dormant state in this cycle, waiting to receive the wake-up packet; Within a cycle, the data packet is actively sent to the concentrator 11 according to the preset time, so that the communication returns to normal.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any changes or substitutions that can be easily imagined by those skilled in the art within the technical scope disclosed in the present invention, All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (4)

1. a sensor acquisition device based on LoRa technology, is used for and concentrator assembly (1) wireless connections, described concentrator group Part (1) includes concentrator (11) and the LoRa wireless module (12) being connected with concentrator (11), it is characterised in that: described biography Sensor harvester includes processor (21) and the data acquisition function unit (22) being connected with processor (21), the 2nd LoRa is wireless Module (23), second timer (24), the LoRa wireless module (12) in concentrator assembly (1) and sensor acquisition device (2) the 2nd LoRa wireless module (23) in carries out radio communication connection；

Described 2nd LoRa wireless module (23), for being waken up in the wakeup packet receiving concentrator (11), receives After communication data packet, waking up processor (21) up, packet is transferred to processor (21), the 2nd LoRa wireless module (23) breaks Electricity, wake-up signal that wakeup packet includes waking up the sensor acquisition device (2) specified up and for pair time packet time Stamp, communication data packet includes the time that the order needing to gather sensing data and packet return；

Processor (21) wakes up up after receiving the interrupt signal of second timer (24), and second timer (24) continues timing, and Open the 2nd LoRa wireless module (23), data or the feedback command composition packet of collection are sent to concentrator (11)；

Described data acquisition function unit (22), for the instruction acquisition gathering sensing data resolved according to processor (21) Sensing data, data acquisition wakes up processor (21), data acquisition function unit (22) power-off up by interruption after completing.

2. wireless senser based on LoRa technology gather a network system, including a concentrator assembly (1) and with concentration Multiple sensor acquisition devices (2) that device assembly (1) connects, concentrator assembly (1) include concentrator (11) and with concentrator (11) The LoRa wireless module (12) connected, each sensor acquisition device (2) includes processor (21) and connects with processor (21) The data acquisition function unit (22) that connects, the 2nd LoRa wireless module (23), second timer (24), in concentrator assembly (1) A LoRa wireless module (12) and sensor acquisition device (2) in the 2nd LoRa wireless module (23) carry out radio communication even Connect, it is characterised in that:

Described concentrator (11) is for according to the data server instruction received, determining and be handed down to sensor acquisition device (2) Packet, then starts to send data to the sensor acquisition device (2) in network one by one by a LoRa wireless module (12) Bag, packet includes wakeup packet and communication data packet, and wherein wakeup packet includes waking up the sensor acquisition device specified up (2) wake-up signal and for pair time packet time stamp, communication data packet includes the life needing to gather sensing data The time that order and packet return；

Described concentrator (11) is additionally operable to reception and from the data of sensor acquisition device (2) and processes,

A described LoRa wireless module (12) is additionally operable to the data return of the sensor acquisition device (2) processed by concentrator (11) To data server；

Described processor (21) is for after being waken up up by the interrupt signal of second timer (24), and second timer (24) is clear Zero, start the timing in a cycle, open the 2nd LoRa wireless module (23) of this node simultaneously, make the 2nd LoRa wireless module (23) becoming resting state from off-position, processor (21) enters resting state, is receiving the 2nd LoRa wireless module (23) it is waken up after the packet sent, during by packet time stamp with concentrator (11) pair, and according to replying concentrator (11) set of time second timer (24), if the instruction of communication data packet is the instruction gathering sensing data, make data acquisition Collection functional unit (22) powers on, and processor (21) enters resting state, and data acquisition function unit (22) starts to gather sensor Data, data acquisition wakes up processor (21), data acquisition function unit (22) power-off, processor (21) up by interruption after completing After preserving the sensing data gathered, enter resting state；If communication data packet is configuration information amendment instruction, processor (21) After process, enter resting state；

Described 2nd LoRa wireless module (23), for being waken up in the wakeup packet receiving concentrator (11), receives After communication data packet, waking up processor (21) up, packet is transferred to processor (21), the 2nd LoRa wireless module (23) breaks Electricity,

Described processor (21) wakes up up after receiving the interrupt signal of second timer (24), and second timer (24) continues meter Time, and open the 2nd LoRa wireless module (23), data or the feedback command composition packet of collection are sent to concentrator (11)；

Described data acquisition function unit (22), for the instruction acquisition gathering sensing data resolved according to processor (21) Sensing data, data acquisition wakes up processor (21), data acquisition function unit (22) power-off up by interruption after completing.

3. wireless senser based on LoRa technology as claimed in claim 2 gathers network system, it is characterised in that: concentrator Assembly (1) also includes the first timer (13) being connected with concentrator (11), and concentrator (11) receives in first timer (13) After disconnected triggering signal, first timer (13) is reset, starts the timing in a cycle according to the widow time determined.

4. wireless senser based on LoRa technology gathers a communication means for network, and it is applied to nothing based on LoRa technology Line sensor gathers in network, and described wireless senser gathers one concentrator assembly (1) of network application and multiple sensor is adopted The star network of storage (2) connects, and sensor acquisition device (2) includes processor (21) and the data acquisition being connected with processor (21) Collection functional unit (22), the 2nd LoRa wireless module (23), second timer (24), concentrator assembly (1) and each sensor 2nd LoRa wireless module (23) of harvester (2) carries out wireless connections, it is characterised in that described method comprises the steps:

After step one, the processor (21) of sensor acquisition device (1) are waken up up by the interrupt signal of second timer (24), by second Intervalometer (24) resets, and starts the timing in a cycle；

After the 2nd LoRa wireless module (23) of this node opened by step 2, processor (21), make the 2nd LoRa wireless module (23) becoming resting state from off-position, processor (21) enters resting state；

The wakeup packet of the concentrators to be received (11) such as step 3, the 2nd LoRa wireless module (23), waiting receiving belongs to Wake up up after the wakeup packet of two LoRa wireless modules (23), waiting receive communication data packet after, wake up processor (21) up, by number Being transferred to processor (21), the 2nd LoRa wireless module (23) power-off according to bag, wherein wakeup packet includes waking up the biography specified up The wake-up signal of sensor harvester (2) and for pair time packet time stamp, communication data packet includes that needs gather and senses The time that the order of device data and packet return；

Step 4, processor (21) resolve the packet received, during by packet time stamp with concentrator (11) pair, and according to Reply the set of time second timer (24) of concentrator (11)；If the instruction of communication data packet is the finger gathering sensing data Order, makes data acquisition function unit (22) power on, and processor (21) enters resting state, and data acquisition function unit (22) starts Gathering sensing data, data acquisition wakes up processor (21) up by interruption after completing, data acquisition function unit (22) power-off, After processor (21) preserves the sensing data gathered, enter resting state；If communication data packet is configuration information amendment instruction, After processor (21) processes, enter resting state.

Step 5, sensor acquisition device (2) wake up up after receiving the interrupt signal of second timer (24), second timer (24) Continue timing, and open the 2nd LoRa wireless module (23), data or the feedback command composition packet of collection are sent to collection Middle device (11)；

Step 6, processor (21) enter resting state, the 2nd LoRa wireless module (23) power-off.