CN108462974A - Failure management method in wireless sensor node and device - Google Patents

Abstract

A kind of failure management method in wireless sensor node is based on following device：Sensor unit, Zigbee transceiver modules and controller；Sensor unit acquires sensing data, collected data is sent to controller, gathered data is sent to Zigbee transceiver modules by controller, and Zigbee transceiver modules send gathered data by way of Zigbee wireless communications；It is additionally provided with GPRS transceiver modules, fault detection module, state handover module, whether fault detection module periodic detection Zigbee transceiver modules work normally, if detecting that Zigbee transceiver modules work normally, then fault detection module continues periodic detection, and send state Normal Feedback signal to controller, if detecting that Zigbee transceiver modules break down, fault detection module sends fault-signal to controller.

Description

Fault management method and device in wireless sensor node

technical field

The present invention relates to wireless sensor nodes, in particular to a fault management method in wireless sensor nodes.

Background technique

In the wireless sensor network of the prior art, the wireless sensor nodes generally use the GPRS module to communicate with the management center, and send the collected data to the management center for analysis and processing. Since the GPRS communication needs to establish a communication connection with the base station, the involved network structure is relatively complex, so the power consumption required for establishing the communication connection and maintaining the communication is relatively high. However, wireless sensor nodes in the wild are usually powered by batteries, and the battery power is limited. Power saving is an important factor to ensure long-term effective work of sensor nodes.

In order to solve the above problems, a wireless sensor network that uses Zigbee mode (MESH) networking instead of GPRS to report and collect data is proposed in the prior art. Zigbee technology is a low-power LAN protocol based on the IEEE802.15.4 standard. It is characterized by low complexity and low power consumption. It is used in the field of remote control and can be embedded in various devices. Although the Zigbee wireless sensor node has the advantage of saving power, when the Zigbee communication module fails, the failure information cannot be reported to the management center through the Zigbee communication network in time, and the existing technology only pays attention to the sensor itself and whether the collected data is abnormal. It does not pay attention to whether the communication module is normal. Moreover, when the Zigbee communication module fails, the sensor nodes are still collecting data. At this time, the collected data cannot be reported to the management center through the Zigbee communication network. Since many collected data requirements are real-time, the collected data that cannot be reported in real time is meaningless of. Moreover, wireless sensor nodes are often distributed in a wide geographical range. It takes a long time for maintenance personnel to complete the maintenance of the Zigbee communication module from the discovery of the fault. During this period, meaningless data collection has consumed a lot of power. .

Contents of the invention

In order to solve the above-mentioned technical problems, the object of the present invention is to provide a fault management method and device in wireless sensor nodes, and another object of the present invention is to provide a wireless sensor network, including a plurality of wireless sensors as claimed in claim 1 Nodes also include Zigbee-GPRS gateways and management centers, and Zigbee is used to realize networking among wireless sensor nodes.

The technical scheme of the present invention is: a fault management method in a wireless sensor node, based on the following devices: a sensor unit, a Zigbee transceiver module and a controller, wherein the sensor unit collects sensor data, sends the collected data to the controller, and controls The device sends the collected data to the Zigbee transceiver module, and the Zigbee transceiver module sends the collected data through Zigbee wireless communication. Whether it is working normally, if it is detected that the Zigbee transceiver module is working normally, the fault detection module will continue to detect regularly, and send a normal status feedback signal to the controller, if it detects that the Zigbee transceiver module is faulty, the fault detection module will send a fault signal to the controller After the controller receives the fault signal, it sends an activation signal to the GPRS transceiver module, and at the same time sends a stop working command to the state switching module. After receiving the activation signal, the GPRS transceiver module connects to the GPRS network, sends fault information to the management center, and switches the state After the module receives the stop working order, it stops the sensor unit from working.

Further, the controller sends a work command to the state switching module when receiving the normal state feedback signal.

Further, the state switching module is a switch arranged on the power supply circuit of the sensor unit. When receiving the work command, the switch is turned on to make the power supply supply power to the sensor unit. When the stop work command is received, the switch is turned off to make the power supply Stop supplying power to the sensor unit.

Further, the wireless sensor node includes an alarm indicator light, and when the fault detection module detects that the Zigbee transceiver module fails, the alarm indicator light will flash.

Further, the fault information includes the fault time, the ID or geographic location of the faulty wireless sensor node, and the like.

Another object of the present invention is to provide a kind of fault management method of wireless sensor network, comprise a plurality of described wireless sensor nodes, also comprise Zigbee-GPRS gateway and management center, realize networking with Zigbee mode between each wireless sensor node , the wireless sensor node collects sensor data, and then wirelessly sends the collected data to the Zigbee-GPRS gateway through Zigbee wireless communication, and the Zigbee-GPRS gateway performs data conversion, converts the Zigbee data into data suitable for GPRS transmission, and receives into the GPRS network, and send the collected data to the management center.

Further, the networking mode of multiple wireless sensor nodes is a star, chain or hybrid network structure.

Further, the management center is provided with a GPRS server and a user interface, and fault information is displayed on the user interface.

The present invention also provides a working method of a wireless sensor node, characterized in that, comprising the following steps:

a. The fault detection module regularly detects whether the Zigbee transceiver module is working normally, if it detects that the Zigbee transceiver module is working normally, then proceed to step b, otherwise proceed to step c;

b. The fault detection module continues to detect regularly, and sends a normal state feedback signal to the controller, and the controller sends a work command to the state switching module to make the sensor unit collect data;

c. The fault detection module sends a fault signal to the controller. After the controller receives the fault signal, it sends an activation signal to the GPRS transceiver module, and at the same time sends a stop working command to the state switching module;

d. After the GPRS transceiver module receives the activation signal, it connects to the GPRS network and sends fault information to the management center;

e. After the state switching module receives the stop working command, the sensor unit stops working and waits for maintenance;

f. When the maintenance is completed, restart and return to step a.

Further, in step b, after the collection is completed, the collected data is sent to the controller, and the controller sends the collected data to the Zigbee transceiver module, and the Zigbee transceiver module sends the collected data through Zigbee wireless communication.

Beneficial effects: Based on the scheme of the present application, when the Zigbee communication module fails, it can switch to the backup communication module to report the failure information, and at the same time stop collecting data, thereby realizing the timely reporting of the failure information and having lower energy consumption. By first detecting whether the Zigbee transceiver module is working normally, and then prompting the sensor unit to collect data when the Zigbee transceiver module is working normally, the sensor unit can stop working when the Zigbee transceiver module is abnormal, reducing power consumption; Such a sequence can make the collected and reported data more real-time. The solution of the present application can switch to the standby communication module to report the fault information when the Zigbee communication module fails, and stop collecting data at the same time, so as to realize the timely reporting of the fault information and have lower energy consumption at the same time.

Description of drawings

FIG. 1 is a schematic diagram of a wireless sensor network of the present invention.

Fig. 2 is a schematic diagram of the structure of the wireless sensor node of the present invention.

Fig. 3 is a working flowchart of the wireless sensor node of the present invention.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1, the wireless sensor network of the present invention includes multiple wireless sensor nodes, a Zigbee-GPRS gateway, and a management center. Zigbee is used to realize the networking between each wireless sensor node, and the networking mode can be star, chain or mixed network structure. The wireless sensor nodes collect sensor data, and then wirelessly send the collected data to the Zigbee-GPRS gateway through Zigbee wireless communication. The Zigbee-GPRS gateway performs data conversion, converts Zigbee data into data suitable for GPRS transmission, and accesses the GPRS network, and sends the collected data to the management center wirelessly over a long distance. The management center is provided with a GPRS server and user interface (not shown).

Figure 2 shows the specific structure of wireless sensor nodes. The wireless sensor node 10 includes a sensor unit, a Zigbee transceiver module, a GPRS transceiver module, a fault detection module, a state switching module and a controller.

The sensor unit collects sensor data, and sends the collected data to the cache of the controller (not shown), and the controller sends the collected data in the cache to the Zigbee transceiver module, and the Zigbee transceiver module sends the collected data to the Zigbee-GPRS gateway.

The fault detection module regularly detects whether the Zigbee transceiver module is working normally. If it is detected that the Zigbee transceiver module is working normally, the fault detection module will continue to detect regularly. It can work normally means that it cannot receive or send data normally, and regularly refers to 1 minute; and sends a normal status feedback signal to the controller, and the controller sends a status feedback signal to the controller. The switching module sends a work command to make the sensor unit collect data. If it is detected that the Zigbee transceiver module fails, the fault detection module sends a fault signal to the controller. After the controller receives the fault signal, it sends an activation signal to the GPRS transceiver module, and at the same time sends a stop working command to the state switching module.

After receiving the activation signal, the GPRS transceiver module connects to the GPRS network, sends fault information to the management center, and displays the fault information on the user interface of the management center. The fault information may include fault time, ID or geographic location of the faulty wireless sensor node, etc. Maintenance personnel can go to the scene for maintenance as soon as possible after seeing the fault information.

Preferably, the wireless sensor node may also include an alarm indicator light (not shown). When the fault detection module detects that the Zigbee transceiver module fails, the alarm indicator light will flash. In this way, maintenance personnel can easily find faulty equipment.

The state switching module makes the sensor unit stop working after receiving the stop working command. Specifically, the state switching module may be a switch provided on the power supply circuit of the sensor unit. When receiving a work command, the switch is turned on so that the power supply supplies power to the sensor unit. When the stop working command is received, the switch is opened, so that the power supply stops supplying power to the sensor unit.

Figure 3 shows the workflow of wireless sensor nodes.

First, the fault detection module regularly detects whether the Zigbee transceiver module is working normally.

If it is detected that the Zigbee transceiver module is working normally, the fault detection module continues to detect regularly, and sends a normal state feedback signal to the controller, and the controller sends a work command to the state switching module to make the sensor unit collect data. After the collection is completed, the collected data is sent to the controller, the controller sends the collected data to the Zigbee transceiver module, and the Zigbee transceiver module sends the collected data to the Zigbee-GPRS gateway through Zigbee wireless communication.

If it is detected that the Zigbee transceiver module fails, the fault detection module sends a fault signal to the controller. After the controller receives the fault signal, it sends an activation signal to the GPRS transceiver module, and at the same time sends a stop working command to the state switching module.

After receiving the activation signal, the GPRS transceiver module connects to the GPRS network, sends fault information to the management center, and displays the fault information on the user interface of the management center.

After the state switching module receives the stop working order, the sensor unit stops working and waits for maintenance.

After the maintenance personnel complete the maintenance, restart and return to the initial step.

By first detecting whether the Zigbee transceiver module is working normally, and then prompting the sensor unit to collect data when the Zigbee transceiver module is working normally, the sensor unit can stop working when the Zigbee transceiver module is abnormal, reducing power consumption; Such a sequence can make the collected and reported data more real-time.

While specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, it should be noted that various modifications may be made without departing from the scope of the described aspects and/or embodiments as defined by the appended claims and modify.

Claims (9)

1. a fault management method in a wireless sensor node, it is characterized in that based on following device: sensor unit, Zigbee transceiver module and controller, wherein, sensor unit gathers sensor data, the data that gathers is sent to controller, controller Send the collected data to the Zigbee transceiver module, and the Zigbee transceiver module sends the collected data through Zigbee wireless communication; it also has a GPRS transceiver module, a fault detection module, and a state switching module. The fault detection module regularly detects whether the Zigbee transceiver module is working normally, if Detecting that the Zigbee transceiver module is working normally, the fault detection module continues to detect regularly and sends a normal status feedback signal to the controller. If it detects that the Zigbee transceiver module is faulty, the fault detection module sends a fault signal to the controller, and the controller receives After the fault signal, send an activation signal to the GPRS transceiver module, and at the same time send a stop working command to the state switching module. After receiving the activation signal, the GPRS transceiver module connects to the GPRS network and sends fault information to the management center. After the work command, make the sensor unit stop working. 2. The fault management method in the wireless sensor node according to claim 1, wherein the fault information includes fault time, ID or geographic location of the faulty wireless sensor node. 3. The fault management method in the wireless sensor node according to claim 1, characterized in that the controller sends a work command to the state switching module when receiving the normal state feedback signal. 4. The fault management method in the wireless sensor node according to claim 1, characterized in that the state switching module is a switch located on the power supply circuit of the sensor unit, when receiving a work order, the switch is turned on, so that the power supply is turned on The sensor unit supplies power, and when receiving the stop working order, the switch is disconnected, so that the power supply stops supplying power to the sensor unit. 5. The fault management method in the wireless sensor node according to claim 1, wherein the wireless sensor node includes an alarm indicator light, and when the failure detection module detects that the Zigbee transceiver module fails, the alarm indicator light flashes. 6. The fault management method in a kind of wireless sensor node according to claim 1, it is characterized in that being applied to wireless sensor network, wireless sensor network comprises a plurality of wireless sensor nodes, also comprises Zigbee-GPRS gateway and management center, each Zigbee is used to realize networking among the wireless sensor nodes. The wireless sensor nodes collect sensor data, and then wirelessly send the collected data to the Zigbee-GPRS gateway through Zigbee wireless communication. The Zigbee-GPRS gateway performs data conversion and converts the Zigbee data Convert the data suitable for GPRS transmission, and access the GPRS network, and send the collected data to the management center. 7. The fault management method in a kind of wireless sensor node according to claim 6, it is characterized in that the networking mode of a plurality of wireless sensor nodes is a star, chain or hybrid network structure; Management center is provided with GPRS server and a user interface, displaying fault information on the user interface. 8. A kind of wireless sensor node fault management method according to claim 6, is characterized in that comprising the following steps: a. The fault detection module regularly detects whether the Zigbee transceiver module is working normally, if it detects that the Zigbee transceiver module is working normally, then proceed to step b, otherwise proceed to step c; b. The fault detection module continues to detect regularly, and sends a normal state feedback signal to the controller, and the controller sends a work command to the state switching module to make the sensor unit collect data; c. The fault detection module sends a fault signal to the controller. After the controller receives the fault signal, it sends an activation signal to the GPRS transceiver module, and at the same time sends a stop working command to the state switching module; d. After the GPRS transceiver module receives the activation signal, it connects to the GPRS network and sends fault information to the management center; e. After the state switching module receives the stop working command, the sensor unit stops working and waits for maintenance; f. When the maintenance is completed, restart and return to step a. 9. a kind of wireless sensor node failure management method according to claim 6, it is characterized in that in the step b, after finishing collecting, the data that collects is sent to controller, and controller is sent to Zigbee transceiver module with collecting data, The Zigbee transceiver module sends the collected data through Zigbee wireless communication.