CN103200704A - ZigBee network monitoring system combined with general packet radio service (GPRS) - Google Patents
ZigBee network monitoring system combined with general packet radio service (GPRS) Download PDFInfo
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Abstract
The invention belongs to the field of wireless sensor network communication, in particular to a ZigBee network wireless monitoring system combined with the general packet radio service (GPRS). In order to overcome the defects existing in wired monitoring system data transmission and to satisfy urgent demands for wireless monitoring systems by certain special environment, a wireless monitoring system combined with GPRS networks and ZigBeenetworks is provided. The ZigBee network monitoring system combined with the GPRS specifically comprises a ZigBee network data collecting layer, a GPRS network data transmission layer and a monitor center, wherein a personal computer (PC) serves as a management layer in the monitor center. The ZigBee network monitoring system combined with the GPRS is capable of guaranteeing reliable and real-time transmission of data and reducing investing and maintaining cost, good in communication quality, low in power dissipation and capable of reducing shortcomings existing in long distance communication.
Description
Technical field
The invention belongs to the radio sensing network communications field, particularly a kind of ZigBee network wireless monitoring system in conjunction with GPRS.
Background technology
Monitoring system has very important meaning in industrial control field.Public arena in many controls field especially at the scene of some unattended operations, dispersion, needs to gather in real time a lot of significant datas, in order in time understand and analyze the situation at scene, and sends the necessary control order according to real-time condition.And traditional monitoring system generally all needs oneself to build and safeguard that wired or wireless communication network goes to realize, the investment maintenance cost is higher, and wired data transfer mode has limited the expansion of application scenario to a great extent, monitor as production process such as electric power, railway, mining and big section steel works etc. to wide apart, if adopt wired mode, in technology and inadvisable economically.Original monitoring system more and more can not satisfy growing many-sided demand, and we need communication quality better, the communication mode that cost is lower.
Follow the development of wireless communication technique, occurred a kind of closely, low complex degree, low-power consumption, low data rate, the ZigBee technology ZigBee of two-way wireless communication is based on the technology of relevant networking, safety and the application software aspect of IEEE802.15.4 wireless standard cheaply, and the ZigBee agreement is to exempt from patent fee, can effectively reduce equipment cost, working frequency range is flexible, 2.4GHZ for unlicensed band, namely be the radio communication that does not have usage charges, be mainly used in automatic control, remote control field and housed device networking.GPRS is the abbreviation of GPRS, and this technology is based upon on the GSM network foundation, be a kind of efficiently, at a high speed, economic communication.GPRS network wide coverage, performance are comparatively perfect, and error correction capability is strong, adaptability is strong, the higher 128kbit/s of reaching of data transmission rate can guarantee reliability of data transmission and real-time.Because the high speed of GPRS network transfer of data and the cheap property of use cost are current like a raging fire in the development and application aspect the wireless monitor to GPRS, GPRS is the highest communication modes of cost performance in the present remote wireless monitoring system.The wireless sensor network cost of forming with the ZigBee technology is low, volume is little, simple in structure; The module dissipation that the employing GPRS network is carried out transfer of data is low, volume is little, is suitable as the back end of wireless sensor network.Therefore, ZigBee technology, GPRS network transfer of data combined with sensor technology form emerging wireless monitor network, will have wide practical use.
At present, traditional wired monitoring and control mode are just replaced by new technology, the communication that wired non-power transmits and monitoring system are because the circuit installation and maintenance is with high costs, As time goes on reliability is difficult to guarantee, and network organization is difficult to change once installing, unless arrange net again, and wireless communication and control transmit network owing to low cost, low-power consumption, networking conveniently are widely used just day by day.Because the effective communication scope of ZigBee network is generally 10～300m, between dispersion relatively spatially, distance unit far away, the transmitting range of control data can be far in each ZigBee network mesh or between net, might surpass the effective coverage range of ZigBee network.And also have the needs of networking by the local area network (LAN) itself that the ZigBee technology constitutes, and the operation of the very large wide area network of space length and maintenance cost are higher.And employing GPRS transmission technology will be saved a large amount of operation and maintenance costs, comparatively speaking less expensive.
Document " based on design and the realization of Zigbee technology wireless temperature supervisory control system " (Yan Deli, Hu Liqiang, Gao Zhanfeng. " Logistics Engineering and Management ", 2009,31 (7): 64-65.), having proposed with PIC18F4620 is controller, CC2420 is radio-frequency module, DS18B20 is design and the realization of the temperature monitoring system node formed of temperature sensor, by the ZigBee technology is applied to traditional temperature monitoring system, has enlarged the range of application of monitoring system.But, if this scheme Surveillance center under the situation of scene temperature monitoring distance away from, transfer of data may exceed the ZigBee effective propagation path, can not guarantee reliability of data transmission and real-time.
Summary of the invention
The objective of the invention is has the deficiency that exists in the line monitoring system transfer of data in order to satisfy, and some particular surroundingss are to the active demand of wireless monitor system, the wireless supervisory control system that provides a kind of GPRS network and ZigBee network to combine.
Design system of the present invention specifically comprises: ZigBee network data acquisition layer, GPRS network data transfer layer and PC are as the Surveillance center of management level.Described ZigBee network data acquisition layer is mainly with the sensor node of some, employing is formed wireless network based on the ZigBee agreement of IEEE802.15.4 standard, this network mainly comprises telegon, router, and terminal equipment, wherein telegon checks network environment, the scan for networks channel, and transmission networking broadcasting, the PAN ID of advertised network and the 64 bit mac addresses of oneself, select an idle channel then, set up network, wait for the networking request of other node device, and also be that aggregation node is communicated by letter with the GPRS communication module as gateway that the GPRS communication module links to each other with exterior I nternet external network; Router and terminal equipment scanning channel, the search channel idle condition sends beacon frame, finds to send the networking claim frame to telegon behind the network, can distribute on-net location to give requesting service after telegon is permitted, and has so far formed a ZigBee wireless network.Router is the distance of extended network transfer of data greatly not only, can also increase the quantity of carry sensor node, terminal equipment is after sensor node joins network, beginning collection site data, and to its father node transmission, transfer of data adopts CSMA/CA to avoid collision mechanism, avoids transfer of data to clash.The GPRS network data transfer layer mainly utilizes transfer of data that the GPRS communication module is responsible for the ZigBee network is sent to Surveillance center, and PC Surveillance center is the real time data come of monitoring transmission then, carry out analyzing and processing after, PC can according to circumstances send control command.
The ZigBee node of ZigBee network data acquisition layer mainly is made up of power module, embedded microprocessor CC2530, sensor interface circuitry, antenna, radio-frequency interface circuit, RS232 communication interface, peripheral Microprocessor Interface circuit and jtag interface circuit.Power module can adopt two joint No.5 cell power supplies, and battery is contained in the battery case, and battery case adheres to and back of circuit board.The CC2530 microprocessor is a real IEEE802.15.4 of being used for, SOC (system on a chip) (SoC) solution that ZigBee and RF4CE use, can with low-down total material cost set up powerful network node .CC2530 integrated the compatible RF transceiver of leading 2.4GHZ IEEE802.15.4, strengthen the 8051MCU of industrial standard, online programmable Flash memory, the RAM of 8KB, 3 general purpose timers and many other powers, and the system that is fit to very much the needs super low-power consumption, this plurality of operating modes by it is guaranteed, has guaranteed its low power consumption the change-over time of the weak point between different operational modes more.Be mainly used in family/building automation, illuminator, Industry Control and detection, power consumption wireless sensor network, consumer electronics, fields such as health care.Sensor interface circuitry provides the interface of required transducer, and radio-frequency interface circuit has guaranteed reliable connection the between antenna and the CC2530 radio frequency pin, and peripheral circuit then provides the CC2530 operate as normal required basic peripheral component.The ZigBee node constitutes wireless network and is responsible for data acquisition, and wherein the ZigBee aggregation node receives, stores and handle the data that each sensor node sends, and with communication and sensor node exchange message, and to GPRS network transmission data.
The GPRS network data transfer layer mainly adopts the GPRS communication module, is made up of power module, STC single-chip microcomputer, GPRS module SIM300, antenna, sim card socket, key circuit, RS232 interface peripherals circuit, jtag interface etc.The STC single-chip microcomputer mainly is responsible for control SIM300 transmitting-receiving data, and AT instructs and state and the function of the Data Control SIM300 of corresponding format by sending.SIM300 supports GSM/GPRS 900/1800/1900MHZ three low-power consumption module frequently, the service of GPRS high-speed data transmission and high-quality voice communications services can be provided, its structure is small and exquisite, almost can satisfy all have requirement to product size commercial Application.The SIM300 inner function module has the LCD interface of keyboard and SPI type, has two serial ports of debugging and data output, and double-tone is passage frequently.Simultaneously SIM300 has low power dissipation design, and the current drain under the sleep pattern only be 2.5mA, and inner integrated ICP/IP protocol stack, and expanded TCP/IP AT instruction makes the user utilize this Development of Module data transmission set to become simple especially, conveniently.After sim card socket inserted SIM card, key circuit can be realized calling, functions such as state connection, RS232 provide and the ZigBee aggregation node between communication interface.The GPRS communication module can be realized the remote transmission of data.GPRS has two kinds of data transfer modes, note transmission means and through the transfer of data of the Internet of GPRS.Owing to use transmitted data amount of note data transmission means less, expense and time are bigger, so adopt the GPRS data transfer mode, GPRS have the connect hours short, data transmission rate is high, the utilization rate of equipment and installations advantages of higher, single-chip microcomputer is connected to GPRS network by AT instruction control SIM300, and enter data-transmission mode, disposable like this can data quantity transmitted will increasing.
PC Surveillance center can be used as management node, is responsible for monitoring the real time data that the GPRS module is sent by monitoring interface, and carries out analysis decision.The ZigBee aggregation node mainly adopts the serial communication mode by serial ports and GPRS communication module, realizes the exchange of information.
The supervisory control system that the present invention is designed, the acquisition layer network has been selected the ZigBee technology of free frequency range for use, data transfer layer has used the high GPRS communication technology of data transmission rate, and the components and parts that can work in low-power consumption mode have been adopted, having reduced network sets up and maintenance cost, alleviate the unreliability of the transfer of data of remote data transmission, overcome the deficiency of wire transmission monitoring system.
Beneficial effect of the present invention has: 1, the native system data collection layer adopts the ZigBee technology of relevant networking, safety and the application software aspect developed based on the IEEE802.15.4 wireless standard, to form a wireless monitor network based on the radio node of CC2530 flush bonding processor, the ZigBee agreement is exempted from patent fee, than technology such as other wireless communication technologys such as infrared, bluetooth, Wi-Fi, have low in energy consumption, data transmission security reliable, realize advantages such as cost is low.
2, after the data acquisition, utilize the real-time transmission data of GPRS network.The coverage of GPRS network is wider, and operation cost is also low, and has high reliability, helps to solve the problem of traditional monitoring network layout difficulty, real-time difference.The GPRS communication module mainly adopts the GPRS communication module based on SIM300.
3, CC2530 and SIM300 chip all can work in low-power consumption mode, and CC2530 has high receiving sensitivity, and anti-interference is also stronger, the embedded powerful ICP/IP protocol of SIM300, and data pass the speed height.
4, the monitoring system of a kind of ZigBee network in conjunction with GPRS proposed by the invention has guaranteed the reliable and real-time Transmission of data to have reduced investment and maintenance cost, and communication quality is better, power consumption weak point lower, that communication exists when having alleviated apart from each other.
Description of drawings
Fig. 1 is the theory diagram of monitoring system of the present invention.
Fig. 2 is the theory diagram of data collection layer ZigBee node among Fig. 1.
Fig. 3 is the theory diagram of data transfer layer GPRS communication module among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention, operation principle are further explained explanation.
See Fig. 1, the monitoring system of a kind of ZigBee network in conjunction with GPRS that the present invention is designed comprises ZigBee network data acquisition layer, GPRS network data transfer layer, PC Surveillance center.The ZigBee node is connected with GPRS network, mainly by the serial communication between ZigBee aggregation node and the GPRS communication module.The GPRS module communicates by GPRS Data Transport Protocol and PC.The main employing carried out radio communication based on the ZigBee agreement of IEEE802.15.4 between the ZigBee node.
The composition of above-mentioned ZigBee network data acquisition layer comprises that the ZigBee telegon also is that aggregation node, router and terminal equipment also are sensor node.The ZigBee protocol stack mainly contains and drives layer, protocol layer and application layer.Driving layer mainly is the ZigBee node that adopts the CC2530 node module, and hardware interface is provided.Protocol layer comprises physical layer, data link layer and network layer, mainly finish the establishment of network and the management of network members, wherein physical layer is finished transmission and the reception of physical layer data, and data link layer is responsible for frame control and data check, and network layer is finished establishment and the supervising the network member of network.The service that application layer invocation protocol layer provides, finish system operation and and other module communications.Before building network, telegon at first checks network environment, the scan for networks channel, and sending networking broadcasting, the PAN ID of advertised network and the 64 bit mac addresses of oneself are selected an idle channel then, set up network, wait for the networking request of other node device; Router and terminal equipment scanning channel, the search channel idle condition sends beacon frame, finds to send the networking claim frame to telegon behind the network, can distribute on-net location to give requesting service after telegon is permitted, and has so far formed a ZigBee wireless network.Each sensor node is responsible for real-time collection site valid data, sends to the ZigBee aggregation node, the data that the ZigBee aggregation node is then stored, the processes sensor node is sent, and utilize serial ports to send to the GPRS communication module.Transfer of data adopts the CSMA/CA data to avoid collision mechanism between the ZigBee node, the generation that CSMA/CA utilizes ack signal to avoid conflict, confirm that just the data of sending have correctly arrived destination address after only receiving the ACK confirmation signal that returns, thereby guaranteed the reliable transmission of data.
Figure 2 shows that the schematic diagram of ZigBee node, the ZigBee node mainly is made up of power module, embedded microprocessor CC2530, sensor interface circuitry, antenna, radio-frequency interface circuit, RS232 communication interface, peripheral Microprocessor Interface and jtag interface circuit.Power module can adopt two joint No.5 cell power supplies, and battery is contained in the battery case, and battery case adheres to and back of circuit board.CC2530 has powerful interference free performance and low power mode of operation.Sensor interface circuitry furnishes us with the sensor interface of required use, radio-frequency interface circuit has guaranteed reliable connection the between antenna and the CC2530 radio frequency pin, the RS232 serial communication interface is responsible for and the communicating to connect of GPRS communication module, peripheral circuit then provides the CC2530 operate as normal required basic peripheral component, and the jtag interface circuit is used for debugging routine.
Figure 3 shows that GPRS communication module schematic diagram, the GPRS module mainly adopts the SIM300 module, is connect extensions, is reached state such as GPRS transfer of data by STC Single-chip Controlling its transmitting-receiving note, phone.The GPRS communication module is made up of power module, STC single-chip microcomputer, GPRS module SIM300, antenna, sim card socket, key circuit, RS232 interface, peripheral circuit and jtag interface etc.The AT order is rule of communication and the standard between wireless module and the microprocessor, be exactly to be connected the exchange of finishing data message by the AT order between single-chip microcomputer and the SIM300, and based on the GPRS data transfer mode of ICP/IP protocol the ZigBee aggregation node be transferred to Surveillance center by the valid data that the RS232 serial ports sends by key circuit control SIM300 employing.GPRS network comprises service GPRS node SGSN and gateway GPRS node GGSN, SGSN is an equipment that closely links to each other with the GPRS base station, can record the position of portable terminal, and GGSN is an equipment that closely links to each other with SGSN and Internet, its handle sends to the server of Internet simultaneously sending to SGSN after the information processing of server again after some information processings of SGSN, SGSN gives terminal equipment again, and GGSN is equivalent to the gateway of external network.So will transfer data to Surveillance center by the GPRS data transfer mode that connects based on TCP, at first the GPRS communication module will be by AT instruction inquiry GPRS connection status, and adhere to the GPRS service by corresponding AT instruction and also namely allow SGSN know the position of this GPRS communication module and think that it has the GPRS function, and use GPRS data service, define data-transmission mode then, the activation data transmission state, and beginning TCP/IP connection and registered port numbers connect with PC Surveillance center, can send data to Surveillance center after connection is set up successfully.TCP provides a kind of connection-oriented, reliable byte stream service, so this data transfer mode also can guarantee reliability of data transmission.
The wireless monitor system of a kind of ZigBee network in conjunction with GPRS proposed by the invention is divided into ZigBee communication module and acquisition module, GPRS communication module and PC data monitoring end.GPRS and two kinds of wireless communication technologys of ZigBee are combined, significant in the monitoring field.CC2530 and SIM300 chip that native system adopts all can work in low-power consumption mode, the ZigBee technical security height, the cost that adopt are low, network capacity is big, adopt GPRS technical data transfer rate height, real-time, whole system investment and maintenance cost are few, when helping remote data transmission transfer of data unreliable with the wire transmission dangerous uneconomic problem that wastes time and energy.
Obviously, above-mentioned execution mode of the present invention only is to be explanation example of the present invention, and is not to be restriction to embodiment of the present invention.For those of ordinary skill in the field, can also be easy to make other pro forma variation on the basis of the above description or substitute, and these changes or substitute also will be included within the protection range that the present invention determines.
Claims (5)
1. ZigBee network monitoring system in conjunction with GPRS, comprise ZigBee network data acquisition layer, GPRS network data transfer layer and PC Surveillance center, it is characterized in that: described ZigBee network data acquisition layer is made up of the ZigBee node, adopt between the node and carry out radio communication with the ZigBee agreement of IEEE802.15.4 standard, ZigBee network data acquisition layer comprises telegon, router, terminal equipment, wherein telegon is equivalent to gateway node, set up network, and wait for the networking request of other node device, be responsible for simultaneously with the GPRS communication module between communicate by letter, router mainly is responsible for the distance of extended network transfer of data, increase the quantity of carry sensor node, terminal equipment also is sensor node collection site valid data, send to gateway node, gateway node receives, send to the GPRS communication module after storage and the processing;
Described GPRS network data transfer layer mainly comprises the GPRS communication module, the GPRS communication module is made up of single-chip microcomputer, GPRS module, sim card socket, antenna, RS232 interface, key circuit, peripheral circuit etc., for the on-the-spot valid data that receive, the processing gateway node is sent, and set up GPRS with PC and be connected, use the AT instruction, by the GPRS data transfer mode of Single-chip Controlling GPRS module employing based on ICP/IP protocol, send data to PC in real time reliably.
2. a kind of ZigBee network monitoring system in conjunction with GPRS according to claim 1, it is characterized in that: described ZigBee node is made up of power module, embedded microprocessor, sensor interface circuitry, antenna, radio-frequency interface circuit, RS232 communication interface, peripheral Microprocessor Interface circuit and jtag interface circuit, power module can adopt two joint No.5 cell power supplies, battery is contained in the battery case, and battery case adheres to and back of circuit board.
3. a kind of ZigBee network monitoring system in conjunction with GPRS according to claim 2, it is characterized in that: described embedded microprocessor model is the CC2530 chip, the integrated compatible RF transceiver of 2.4GHZ IEEE802.15.4, strengthen the 8051MCU of industrial standard, online programmable Flash memory, the RAM of 8KB, 3 general purpose timers.
4. a kind of ZigBee network monitoring system in conjunction with GPRS according to claim 1, it is characterized in that: described GPRS module model is SIM300.
5. a kind of ZigBee network monitoring system in conjunction with GPRS according to claim 1 is characterized in that: transfer of data adopts the CSMA/CA data to avoid collision mechanism, the generation that CSMA/CA utilizes ack signal to avoid conflict between described ZigBee node.
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Application publication date: 20130710 |