CN202352033U - Prisoner monitoring system based on Zigbee wireless network and GPRS (General Packet Radio Service) wireless network - Google Patents

Abstract

The utility model relates to a wireless communication and monitoring system. The utility model discloses a prisoner monitoring system based on a Zigbee wireless network and a GPRS wireless network, comprising a mobile node, a reference node, a gateway node and a monitoring center. The mobile node passes through The Zigbee wireless network communicates with the reference node and performs data transmission. The reference node communicates with the gateway node through the Zigbee wireless network and performs data transmission. The gateway node is connected with the monitoring center through the GPRS wireless network. The utility model solves the limitations of the field of view and the sensitivity to the weather environment of the traditional video monitoring system and the difficulty of equipment maintenance.

Description

Prisoner Monitoring System Based on Zigbee Wireless Network and GPRS Wireless Network

technical field

The utility model relates to a wireless communication and monitoring system. Specifically relates to a prisoner monitoring system based on Zigbee wireless network and GPRS wireless network.

Background technique

With the development and changes of the society, the composition of the prisoners in the prison is becoming more and more complex, and the thoughts of the prisoners are becoming more and more active, which leads to frequent disturbances and escapes of prisoners in the supervision area. Relying only on the traditional video surveillance system and alarm system, it is impossible to eliminate dead spots, and cannot accurately locate and track prisoners in real time, and at night or in bad weather, such as heavy rain and fog, the video surveillance system cannot function normally due to the limitation of vision , All of these give opportunities for prisoners who deliberately make trouble and escape from prison. Therefore, it is necessary to use modern technical means combined with the current situation of prison management to establish a prisoner monitoring system that can track prisoners in real time and has a cross-border alarm function.

Utility model content

The purpose of this utility model is to provide a prisoner monitoring system based on Zigbee wireless network and GPRS wireless network, thereby solving the problems of limited field of view, sensitivity to weather environment and difficult maintenance of equipment of traditional video monitoring system.

In order to achieve the above object, the utility model adopts the following technical solutions:

A prisoner monitoring system based on a Zigbee wireless network and a GPRS wireless network of the present utility model includes a mobile node, a reference node, a gateway node and a monitoring center, and the mobile node communicates with the reference node through the Zigbee wireless network and performs data transmission , the reference node communicates with the gateway node through the Zigbee wireless network, and performs data transmission, and the gateway node is connected with the monitoring center through the GPRS wireless network.

Wherein, the mobile node includes a Zigbee wireless transmission device, an anti-violence disassembly device, a power management device, an alarm prompt device, and an emergency help button, wherein the power management device is connected with the Zigbee wireless transmission device, the anti-violence disassembly device, and the alarm prompt respectively. The device and the emergency help button are connected, and the Zigbee wireless transmission device is respectively connected with the anti-violence dismantling device, the alarm prompt device, and the emergency help button.

Wherein, the reference node includes a Zigbee wireless transmission device, a power module, and an alarm prompting device, wherein the power supply device is connected to the Zigbee wireless transmission device and the alarm prompting device respectively, and the Zigbee wireless transmission device is connected to the alarm prompting device.

Wherein, the gateway node includes a power supply device, a wireless transmission device, a data processing device, and a GPRS device, wherein the power supply device is connected with the wireless transmission device, the data processing device, and the GPRS device respectively, and the wireless transmission device is connected with the data processing device, and the data processing The device is connected with the GPRS device, and the gateway node is used to implement protocol conversion between the Zigbee wireless network and the GPRS device. The GPRS module uploads the data obtained from the Zigbee wireless ad hoc network to the monitoring center through the GPRS network.

Wherein, the power supply device includes a solar power supply device or other power supply devices.

Owing to having taken above technical scheme, the utility model has the advantage that:

The real-time location tracking and monitoring of prison inmates is realized through the low-power, self-organizing Zigbee wireless network. The location information of prisoners can be observed in real time through the graphical interface of the monitoring center. The outdoor nodes are powered by solar energy, and the indoor nodes are powered by batteries. The equipment is easy to maintain. It has a long service life, overcomes the shortcomings of traditional video surveillance systems that are sensitive to weather, and effectively prevents prisoners from rioting and escaping in the supervision area. It has shown great application value in prisoner monitoring and event tracking in harsh conditions and unattended prisoners.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is a structural block diagram of the utility model mobile node;

Fig. 3 is a structural block diagram of the utility model reference node;

Fig. 4 is a structural block diagram of the gateway node of the present invention.

Detailed ways

The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

As shown in Figure 1, a kind of prisoner monitoring system based on Zigbee wireless network and GPRS wireless network of the present utility model is made up of mobile node, reference node, gateway node and monitoring center.

Its working process: establish a Zigbee wireless ad hoc network through the mobile node, reference node and gateway node, locate the mobile node in the network, collect the location information and alarm information of the mobile node, transmit it to the gateway through the Zigbee wireless ad hoc network, and the gateway node Perform the protocol conversion between Zigbee wireless network and GPRS wireless network, and then transmit the location information and alarm information to the monitoring center through the GPRS wireless network. The monitoring center processes the received information, tracks and records the location of the mobile node, and at the same time generates alarm The mobile node of the information is calibrated and a corresponding alarm is issued, prompting the supervisor to take corresponding measures. Among them, the mobile node adopts the CC2431 chip of Zigbee radio frequency launched by Texas Instruments (TI), and uses its internal integrated RSSI positioning engine to cooperate with the reference node to calculate the position of the node; the reference node adopts another Zigbee launched by Texas Instruments (TI) The radio frequency CC2430 chip does not contain a positioning engine and is used as a reference node for the position coordinates to cooperate with the mobile node; the gateway node uses a gateway combining Zigbee wireless network and GPRS wireless network to complete the Zigbee wireless network and GPRS wireless network. Protocol conversion, the data is transmitted to the monitoring center through the GPRS wireless network to realize remote monitoring.

The mobile node is the positioning unit of the wireless sensor network. The mobile node is worn by prisoners and powered by button batteries, including: Zigbee wireless transmission device, emergency help button, anti-violence disassembly device, alarm prompt device and power supply device. The Zigbee wireless transmission device adopts the CC2431 chip of Zigbee wireless radio frequency launched by Texas Instruments (TI), and calculates the position of the node through its internal integrated RSSI positioning engine and the reference node.

The reference node is a node with a known location, which is used for auxiliary positioning. The reference node adopts another Zigbee radio frequency CC2430 chip launched by Texas Instruments (TI). This chip does not contain a positioning engine, so it is used as a reference node to cooperate with mobile nodes. position.

The gateway node is the core device of the wireless sensor network. It has two working modes, that is, the working mode and the sleep mode, and is mainly responsible for the information connection between the mobile node and the monitoring center. The gateway node is equipped with a CC2430 device matching the reference node for Zigbee wireless short-distance communication, and also has an MC35I device for remote data transmission with the monitoring center through the GPRS wireless network. When the gateway node receives the data sent by the mobile node, the gateway node enters the working mode, the processor performs fast processing, and transmits the data to the monitoring center. After the data is sent, the node immediately enters the sleep mode. When the gateway node receives the command sent by the monitoring center, the gateway node enters the working mode. After being processed by the processor, the command is sent to the corresponding mobile node, waiting to receive the information data of the mobile node and forwarding it to the monitoring center. then enter sleep mode. Since the processing time of the processor is quite fast, the processor is in sleep mode most of the time, which reduces the power consumption of the system.

The software of the monitoring center is programmed in C# language, which can collect and calibrate the location information of mobile nodes in the network in real time through the Zigbee wireless network, and archive the location of personnel in the network, support historical track playback, and process various alarm information from the network at the same time , make a corresponding alarm to prompt the management personnel.

Figure 2 is a structural block diagram of the utility model mobile node. The mobile node consists of five parts, namely Zigbee wireless transmission device, emergency help button, anti-violence dismantling device, alarm prompt device and power supply device.

The Zigbee wireless transmission device adopts the first-generation ZigBee/IEEE 802.15.4 wireless radio frequency transceiver dedicated to the 2.4GHz license-free ISM frequency band launched by Texas Instruments (TI) -- CC2431; CC2431 is the SoC solution of Texas Instruments (TI) , which integrates the industry-leading CC2420RF transceiver core and enhanced 8051 microcontroller, with 128kB flash memory, 8kB RAM and other additional functions, and CC2431 also integrates a positioning engine based on RSSI (Received Signal Strength Indicator), The engine can accurately calculate the position of relevant nodes according to the received signal strength and the known CC2430 reference node position, and then send the position information to the gateway through the reference node, and then upload it to the monitoring center.

The emergency help button is used for victims or witnesses of emergencies such as prisoners in the prison to call for help. When the button is pressed, the mobile node will upload the alarm information and alarm location information to the monitoring center through the Zigbee wireless network. Data processing and analysis, the location of the alarm and prisoner information are calibrated in the graphical interface, and an alarm signal is generated to notify the management personnel, and the management personnel take corresponding measures in a timely manner according to the specific situation.

The anti-violence dismantling device is an anti-dismantlement alarm circuit. The mobile node is suitable for making wristbands or anklets to be worn by prisoners. Once the circuit is destroyed, a violent dismantling alarm will be generated. And the alarm location information is uploaded to the monitoring center by the Zigbee wireless network. Similarly, the monitoring center will calibrate the alarm location and prisoner information on the graphical interface after data analysis, and generate an alarm signal to notify the management personnel.

The alarm prompt device is used to warn the prisoner. When the prisoner illegally approaches the border of the monitoring area or enters the forbidden area forcibly, the device will send out a warning message, the warning light will flash, and the siren will sound. At the same time, the alarm information and alarm location information will be uploaded to the Monitoring center, the monitoring center calibrates the location and prisoner information and sends out an alarm. In addition, at the same time, the reference node closest to the alarm mobile node will also generate an alarm signal to warn the prisoner, until the prisoner returns to the designated area, the alarm signal disappears.

The main function of the power supply unit is to supply power to the above devices. Since the mobile nodes are all equipped with low-power devices, and the mobile nodes are carried by the prisoner, the mobile nodes are powered by button batteries and contain a power supply detection circuit. The Zigbee wireless network uploads to the monitoring center to notify the management personnel.

Figure 3 is a structural block diagram of the reference node of the utility model, and the reference node is composed of a wireless transmission device, a power supply device, and an alarm prompt device.

The wireless transmission module adopts another ZigBee/IEEE 802.15.4 radio frequency transceiver-CC2430, which is dedicated to the 2.4GHz license-free ISM frequency band launched by Texas Instruments (TI). This chip, like CC2431, integrates the CC2420RF transceiver core and enhanced Type 8051 microcontroller, but CC2430 does not have a positioning engine, so it is used as a reference node with known coordinates to cooperate with CC2431. Each positioning network should be configured with at least 3 reference nodes to determine the position of the mobile node.

The alarm prompt device is used to warn the prisoner. When the prisoner illegally approaches the border of the monitoring area, or forcibly enters the forbidden area, the mobile node will send a warning message, the warning light will flash, and the siren will sound. At the same time, the alarm information and alarm location information will be sent to The border reference node closest to the alarm mobile node, the reference node will detect the alarm and generate an alarm signal, flash the alarm indicator light, turn on the siren, and upload the alarm information to the monitoring center through the Zigbee wireless network, and the monitoring center will monitor the location and prisoner information to calibrate and issue an alarm. The alarm signal disappears until the prisoner returns to the designated area.

The power supply device of the reference node can be directly powered by a rechargeable battery or powered by a solar panel rechargeable lithium battery according to the indoor and outdoor layout. Figure 3 shows the solar power supply scheme, which can realize continuous power supply of the outdoor reference node. The solar panel is used to automatically charge the rechargeable lithium battery through the power management charging circuit, the energy is clean, green and environmentally friendly, which increases the service life of the equipment and reduces the difficulty of maintenance of the equipment.

Figure 4 is a structural block diagram of the gateway node of the utility model, and the gateway node includes four parts: Zigbee wireless transmission device, processor device, GPRS device and power supply device.

Wireless transmission device: This utility model still adopts the radio frequency transceiver CC2430 that Texas Instruments (TI) company releases that matches with reference node.

Processor device: the utility model adopts the MSP430 series single-chip microcomputer of ultra-low power consumption 16-bit RISC mixed-signal processor that Texas Instruments (TI) company releases to complete the protocol conversion between Zigbee wireless network and GPRS wireless network.

GPRS device: This utility model adopts a new generation of Siemens GSM/GPRS dual-mode device - MC35I, MC35I is launched by Siemens, which can quickly, safely and reliably realize data, voice transmission and short message service (Short Message Service) in the system solution ) and fax. The operating voltage of the device is 3.3-4.8V, and it can work in two frequency bands of 900MHz and 1800MHz, and the power consumption of the frequency bands is 2W (900M) and 1W (1800M) respectively. The device includes all the functions of the previous version TC35, and at the same time adds fast GPRS technology, adopts GPRS time-division multiplexing CLASS 8 standard, has always-on function and theoretically the transmission rate can reach up to 171.2kb/s, communication The transmission delay is small, and the longest does not exceed 3s. The device has an AT command set interface, supports short messages in text and PDU modes, the second type of fax in the third group, and non-transparent modes of 2.4k, 4.8k, and 9.6k. Common working modes include power saving mode, IDLE, TALK and other modes. Through the unique 40-pin ZIF connector, the two-way transmission of power connection, command, data, voice signal, and control signal is realized. Through the ZIF connector and 50Ω antenna connector, the SIM card holder and antenna can be connected respectively.

Power supply device: This module is still charged by solar panels and powered by lithium batteries. See Figure 3 for reference nodes.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made. All the implementation manners cannot be exhaustively listed here. All obvious changes or variations derived from the technical solutions of the utility model are still within the scope of protection of the utility model.

Claims (4)

1. a prisoner monitoring system based on Zigbee wireless network and GPRS wireless network, is characterized in that: comprise mobile node, reference node, gateway node and monitoring center, described mobile node is connected with reference node communication by Zigbee wireless network, and carries out For data transmission, the reference node communicates with the gateway node through the Zigbee wireless network, and performs data transmission, and the gateway node is connected with the monitoring center through the GPRS wireless network. 2. A kind of prisoner monitoring system based on Zigbee wireless network and GPRS wireless network according to claim 1, is characterized in that: described mobile node comprises Zigbee wireless transmission device, anti-violence dismantling device, power management device, warning prompt device, emergency help button, among which, the power management device is respectively connected with Zigbee wireless transmission device, anti-violence dismantling device, alarm prompt device, emergency help button, Zigbee wireless transmission device is respectively connected with anti-violence dismantling device, alarm prompt device, emergency Help button to connect. 3. a kind of prisoner monitoring system based on Zigbee wireless network and GPRS wireless network according to claim 1, is characterized in that: described reference node comprises Zigbee wireless transmission device, power supply module, alarm prompting device, wherein, power supply device respectively It is connected with the Zigbee wireless transmission device and the alarm prompt device, and the Zigbee wireless transmission device is connected with the alarm prompt device. 4. A kind of prisoner monitoring system based on Zigbee wireless network and GPRS wireless network according to claim 1, is characterized in that: described gateway node comprises power supply device, wireless transmission device, data processing device, GPRS device, wherein, power supply The device is respectively connected to the wireless transmission device, the data processing device, and the GPRS device, the wireless transmission device is connected to the data processing device, the data processing device is connected to the GPRS device, and the gateway node is used to realize the protocol conversion between the Zigbee wireless network and the GPRS device . the

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