CN101477188A - Intelligent article monitoring tracing and managing system based on wireless sensor network - Google Patents
Intelligent article monitoring tracing and managing system based on wireless sensor network Download PDFInfo
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- CN101477188A CN101477188A CNA2009100286722A CN200910028672A CN101477188A CN 101477188 A CN101477188 A CN 101477188A CN A2009100286722 A CNA2009100286722 A CN A2009100286722A CN 200910028672 A CN200910028672 A CN 200910028672A CN 101477188 A CN101477188 A CN 101477188A
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Abstract
The invention discloses an intelligent article monitoring, tracking and management system based on a wireless sensor network. The system integrates multifunction of temperature monitoring, personnel identification and equipment and personnel positioning into a system, adopts connection between a wireless sensor terminal and the equipment or the personnel, acquires temperature, pressure, signal strength and other signals by a sensor, and transmits the signals to a central server by a free wireless frequency band; and the central server can judge health state of the equipment, position of the personnel and other information from the received signals, and alarms for abnormal conditions in time. The system is suitable for realizing various functions from the temperature monitoring to the personnel positioning in a hospital, a factory and other complex electromagnetic environments.
Description
Technical field
The invention belongs to areas of information technology, relate in particular to a kind of intelligent article monitoring tracing and management system based on wireless sensor network.
Background technology
The wireless articles monitoring management is meant and uses wireless technology that parameter informations such as the sign of article such as equipment personnel, temperature, humidity, position are carried out real-time wireless monitor, abnormal conditions are in time reported to the police, and improve the service efficiency of article by historical data analysis.Wireless articles monitoring management technology is widely used in other industries such as medical industry, bio-pharmaceuticals industry, food service industry, machine industry and logistics, and the efficient and the security that can improve above-mentioned industry greatly reduce the cost of runing.The subject matter that for example present medical institutions face comprises: the utilization rate of Medical Devices is low, the buying of too much Medical Devices, can't satisfy the various requirement of medical supervision department, employee's inefficiency, the Loss Rate of equipment is too high, special medical care patient's supervision and generation of malpractice or the like, the intelligent article monitoring tracing system can solve the current variety of problems that faces of medical institutions in many aspects, the wireless temperature monitoring that comprises equipment, equipment location and management, personal management and personal identification and rights management or the like.
The technology of using mainly is that radio-frequency (RF) identification is RFID (Radio Frequency IDentification) technology at present, claim electronic tag, radio frequency identification again, this is a kind ofly can discern specific objective and read and write related data by radio signal, and need not to set up machinery between recognition system and the specific objective or optics contacts.Rfid system comprises RFID label and read write line, and in general RFID label cost is lower, generally arrive hundreds of unit (active) in several units (passive type), and the read write line cost is very high, up to the thousands of units of Renminbi.It is passive that the RFID label is divided into, initiatively two big classes.Passive label does not have internal power supply.Its internal integrated circuit drives by the electromagnetic wave that receives, and these electromagnetic waves are sent by the RFID reader.When label receives enough signals, can send data to reader.These data not only comprise (the unique sign ID in the whole world) ID number, can also comprise preexisting in the data among the EEPROM in the label.Because it is cheap that passive label has, need not the advantage of power supply.The RFID label of existing market mainly is a passive type.Have only several centimetres but the operating distance of active tag is very short, canned data is also very limited in addition.Different with passive type and semi-passive is that active tag itself has the internal electric source supply, in order to supply the required power supply of inner IC to produce external signal.In general, active tag has and long reads distance and bigger memory size can be used for storing some appended messages that reader sends, but the also mutually deserved height of cost is a lot.
(wireless sensor network WSN) is considered to one of most important technology of 21 century to wireless sensor network, is the numerous sensor mode by radio communication, connects each other, handles, transmits the network (Fig. 8) of information.The wireless sensor network principal feature comprises: almost nil installation cost, configuration more simply and easily, transducer arrangements more flexibly, more be applicable to abominable or disaster environment, thereby the network of intelligence improves reaction and processing power, lower energy consumption and the longer life-span to sensing data more.
On the mobile computing and network international conference of the U.S. in 2000, having proposed wireless sensor network is the next opportunity to develop that faces in century.2003, when U.S.'s " technology review " magazine was discussed following emerging ten big technology, wireless sensor network was listed in first following emerging technology.2003, U.S.'s Business Week WeiLai Technology special edition, when discussing four big new technologies, wireless sensor network is also listed in wherein.On Dec 26th, 2007, in the national great special embodiment of holding in the Executive Meeting of the State Council review by the Premier Wen Jiabao and passing in principle, short-distance wireless interconnected with sensor network be an important direction." national Eleventh Five-Year Plan scientific and technical development program " also pointed out, grasps the gordian technique of nearly short-distance wireless interacted system and sensor network, and the commerce application that strengthens scientific and technological achievement is one of important goal.The application market of wireless sensor network progressively starts at present, can both see the figure of wireless sensor network in fields such as Monitoring and Controlling, hazard prediction and military affairs.
With respect to the RFID technology, wireless sensor network has the longer life-span, stronger networking and antijamming capability, better station-keeping ability and very low cost, therefore be specially adapted in complex electromagnetic environments (as medical institutions or factory), use, simultaneously, the wireless sensor network with Ad-hoc network characteristic can make compatible equipment arbitrarily add in the network, has very high dirigibility.
Summary of the invention
The purpose of this invention is to provide a kind of intelligent article monitoring tracing and management system, various functions such as under complex electromagnetic environments such as hospital or factory, realize from the temperature monitoring to the personnel positioning based on wireless sensor network.
For achieving the above object, solution of the present invention is: a kind of intelligent article monitoring tracing and management system based on wireless sensor network, this system links to each other the wireless senser terminal with equipment or personnel, by signals such as sensor acquisition temperature, pressure and signal intensities, and these signals are sent to central server by free radio band, central server can be from the health status of the signal judgment device accepted, information such as personnel's position are in time reported to the police to abnormal conditions.
Described system comprises a plurality of wireless senser terminals, a plurality of identification and locating terminal, a plurality of reference mode, a gateway and a central server:
1) radio temperature sensor terminal
The wireless temperature sensing terminal is integrated microprocessor, radio receiving transmitting module, high-precision temperature sensor, battery and multiple standards interface such as RS232, RS485 etc., can preserve case in relevant preservation equipment such as the blood of all temps on the market easily, medicine preservation case etc. links to each other.
2) identification and locating terminal
Identification and integrated microprocessor, radio receiving transmitting module, MEMS baroceptor and battery above the locating terminal, major function is the position of monitoring the user.
3) reference mode
Integrated microprocessor, radio receiving transmitting module and baroceptor above the reference mode, major function are to guarantee that the communication of network is unobstructed, and the reference signal of radiofrequency signal and air pressure signal is provided simultaneously, so that infer the position of terminal.
4) gateway
Gateway offers one of wireless sensor network and other communication networks, and (as Internet, (GPRS, 3G Bluetooth) transmit the interface of data for WLAN (wireless local area network) (WiFi) or other wireless communication networks.Use these communication networks, the local data that wireless senser is collected can be sent to the monitor terminal of Local or Remote.Server that local monitoring terminals can be or handheld device.And long-range terminal can be a large server.
5) central server
Central server is used for the temperature sensor signal that receives is monitored, and abnormal conditions is reported to the police the position that wireless signal strength that the use locating terminal observes and air pressure combined signal are determined locating terminal.
1) radio receiving transmitting module-3) in the wireless senser terminal can adopt a plurality of free frequency ranges, for example 433MHz or 2.4GHz.Its transmission manner adopts the frequency modulation transmission manner to guarantee the stability of communication.
1) the wireless senser terminal described in promptly can directly link to each other with the interface that equipment that temperature sensor is arranged such as blood are preserved case, refrigerator etc. and provided by equipment, provide the data wireless transmission to expand, also can be placed directly in the environment or equipment that needs observed temperature, carry out temperature monitoring with the temperature sensor that has had on the terminal.
2) identification described in both can link to each other with equipment with locating terminal, also can be used as portable set and was carried by personnel.
3) position of the quantity of described reference mode should be fixed, and its position coordinates should be stored in the central server in advance, should guarantee that every floor has a reference point at least.
4) gateway described in can directly be integrated in the central server.
5) type of alarm described in can comprise multiple modes such as audible alarm, telephone call or SMS remote alarms/
The algorithm of wireless signal strength 5) and air pressure co-located comprises the steps:
Step 1. locating terminal is sent to central server with signal intensity and the air pressure signal that receives, and the air pressure signal of reference mode observation also sends to central server.
Step 2. central server is determined the two-dimensional position of locating terminal by triangle location or additive method with signal strength information.
Step 3. central server compares the air pressure signal that air pressure signal and each reference mode of locating terminal observation receives, and finds out the immediate reference point of air pressure signal.Locating terminal place floor is exactly the floor at this reference point place.
System of the present invention is suitable for and indoor environments such as hospital, laboratory or factory, and the characteristics of these environment are: have a large amount of electronic equipments, electromagnetic interference (EMI) is bigger, and is very high to the interference size requirements of the anti-jamming capacity of electronic equipment and generation.
The advantage of invention comprises:
1. the frequency modulation technology in the wireless sensor network technology of Cai Yonging, anti-interference is better.
2. the present invention adopts free radio band, does not have the communication cost.
3. wireless sensor network technology is a Low-power Technology, and terminal reaches the several years in serviceable life, and is little to the interference of other equipment.
4. the present invention is integrated into temperature monitoring, personal identification, the multiple function of equipment personnel positioning in the system.
5. employing wireless signal intensity of the present invention and baroceptor co, bearing accuracy especially the two dimension bearing accuracy very high.
Description of drawings
Fig. 1 is a system of the present invention composition diagram.
Fig. 2 is the structural representation of radio temperature sensor terminal of the present invention.
Fig. 3 is the structural representation of identification of the present invention and locating terminal.
Embodiment
The present invention is described further below in conjunction with accompanying drawing and embodiment.
System of the present invention composition diagram as shown in Figure 1, mainly contain following ingredient:
Radio temperature sensor terminal: the wireless temperature sensing terminal is integrated microprocessor, radio receiving transmitting module, high-precision temperature sensor, battery and multiple standards interface such as RS232, RS485 etc., as shown in Figure 2.The effect of radio temperature sensor is to link to each other with all temps apparatus sensitive, preserves case, baby's incubator, refrigerator that food is used or the like as medical blood.The interface that the wireless temperature sensing terminal provides can link to each other with these equipment, and the thermometer that direct fetch equipment carries also can come monitor temperature with temperature sensor integrated on the radio temperature sensor terminal.Temperature data finally sends to central server analysis by radio receiving transmitting module.
Identification and locating terminal: identification and integrated microprocessor, radio receiving transmitting module, MEMS baroceptor and battery above the locating terminal, as shown in Figure 3.Major function is monitoring user's position, and identification and locating terminal collection be from the radiofrequency signal of reference point and the transmissions of other sensor nodes, and the barometric information that the intensity and the MEMS baroceptor of these signals collects is sent to central server.
Reference mode: integrated microprocessor, radio receiving transmitting module and baroceptor above the reference mode, major function are to guarantee that the communication of network is unobstructed, and the reference signal of radiofrequency signal and air pressure signal is provided simultaneously, so that infer the position of terminal.In general, the stationkeeping of reference point, its location storage is in central server.
Gateway: gateway offers one of wireless sensor network and other communication networks, and (as Internet, (GPRS, 3G Bluetooth) transmit the interface of data for WLAN (wireless local area network) (WiFi) or other wireless communication networks.Use these communication networks, the local data that wireless senser is collected can be sent to the monitor terminal of Local or Remote.Local monitoring terminals can be server or handheld device, and long-range terminal can be a large server.
Central server: central server is used for the temperature sensor signal that receives is monitored, and abnormal conditions is reported to the police the position that wireless signal strength that the use locating terminal observes and air pressure combined signal are determined locating terminal.
System uses the wireless signal of free frequency range, comprises 433MHz and 2.4GHz, for the assurance system works under abominable electromagnetic environment, system adopts reticulate texture and frequency hopping, that is to say, all can communicate by letter between any two sensor nodes, thereby enlarged the working range of system.When the electromagnetic interference (EMI) of a frequency range was excessive, system can select another frequency range automatically.
Native system uses the algorithm of wireless signal strength and air pressure co-located to position, and this algorithm comprises the steps:
Step 1. locating terminal is sent to central server with signal intensity and the air pressure signal that receives, and the air pressure signal of reference mode observation also sends to central server.
Step 2. central server is determined the two-dimensional position of locating terminal by triangle location or additive method with signal strength information.
Step 3. central server compares the air pressure signal that air pressure signal and each reference mode of locating terminal observation receives, and finds out the immediate reference point of air pressure signal.Locating terminal place floor is exactly the floor at this reference point place.
System of the present invention is suitable for and the indoor environments such as hospital, laboratory or factory, and the characteristics of these environment are: exist big The amount electronic equipment, electromagnetic interference is bigger, and is very high to the interference size requirements of the jamproof ability of electronic equipment and generation. For example, Native system is applied to hospital. In this is used, radio temperature sensor terminal and blood storage box, vaccine storage box, baby Youngster's incubator etc. needs the equipment of detected temperatures to link to each other, and the Medical Devices of identification and the movements such as locating terminal and wheelchair, lung ventilator mutually Connect, identification and locating terminal can be worn on doctor and patient's the body simultaneously. Central server receives the temperature sensor terminal Temperature signal, be used for round-the-clock real-time monitoring temperature, in case it is unusual to find that temperature occurs, give the alarm immediately, simultaneously in Heart server also comes equipment and personnel are positioned by energy and the air pressure signal of analyzing the transmission of identification and locating terminal, can Find rapidly Medical Devices and personnel's position, can also prevent losing of equipment, and the monitoring that realizes especial patient.
Claims (8)
1, a kind of intelligent article monitoring tracing and management system based on wireless sensor network, it is characterized in that the wireless senser terminal is linked to each other with equipment or personnel, by signals such as sensor acquisition temperature, pressure and signal intensities, and these signals are sent to central server by free radio band, central server can be from the health status of the signal judgment device accepted, information such as personnel's position are in time reported to the police to abnormal conditions.
2, a kind of intelligent article monitoring tracing and management system based on wireless sensor network according to claim 1 is characterized in that system comprises a plurality of wireless senser terminals, a plurality of identification and locating terminal, a plurality of reference mode, a gateway and a central server.
3, a kind of intelligent article monitoring tracing and management system according to claim 2 based on wireless sensor network, it is characterized in that described wireless senser terminal integrated microprocessor, radio receiving transmitting module, high-precision temperature sensor, battery and multiple standards interface such as RS232, RS485 etc.
4, a kind of intelligent article monitoring tracing and management system according to claim 2 based on wireless sensor network, it is characterized in that described identification and integrated microprocessor, radio receiving transmitting module, MEMS baroceptor and battery above the locating terminal, major function is monitoring user's position.
5, a kind of intelligent article monitoring tracing and management system according to claim 2 based on wireless sensor network, it is characterized in that described reference mode integrated microprocessor, radio receiving transmitting module and baroceptor, major function is to guarantee that the communication of network is unobstructed, provide the reference signal of radiofrequency signal and air pressure signal simultaneously, so that infer the position of terminal.
6, a kind of intelligent article monitoring tracing and management system according to claim 2 based on wireless sensor network, it is characterized in that described gateway offers one of wireless sensor network and other communication networks (as Internet, WLAN (wireless local area network) (WiFi) or other wireless communication networks (GPRS, 3G, Bluetooth) interface of transmission data.Use these communication networks, the local data that wireless senser is collected can be sent to the monitor terminal of Local or Remote.Server that local monitoring terminals can be or handheld device, and long-range terminal can be a large server.
7, a kind of intelligent article monitoring tracing and management system according to claim 2 based on wireless sensor network, it is characterized in that described central server monitors the temperature sensor signal that receives, abnormal conditions are reported to the police the position that wireless signal strength that the use locating terminal observes and air pressure combined signal are determined locating terminal.
8, a kind of intelligent article monitoring tracing and management system based on wireless sensor network according to claim 7 is characterized in that the wireless signal strength and the air pressure combined signal that use locating terminal to observe determine that the method for the position of locating terminal comprises following steps
Step 1. locating terminal is sent to central server with signal intensity and the air pressure signal that receives, and the air pressure signal of reference mode observation also sends to central server.
Step 2. central server is determined the two-dimensional position of locating terminal by triangle location or additive method with signal strength information.
Step 3. central server compares the air pressure signal that air pressure signal and each reference mode of locating terminal observation receives, and finds out the immediate reference point of air pressure signal.Locating terminal place floor is exactly the floor at this reference point place.
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