CN103067941A - Multivariable distributed type online monitoring system based on wireless sensor network - Google Patents
Multivariable distributed type online monitoring system based on wireless sensor network Download PDFInfo
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Abstract
The invention discloses a multivariable distributed type online monitoring system based on a wireless sensor network. The multivariable distributed type online monitoring system based on the wireless sensor network comprises an upper computer and a lower computer. The lower computer comprises a central control module, a radio frequency transport module, a data collecting module and a power management module, wherein the central control module comprises a processor, a peripheral circuit and a storage module. The data collecting module comprises a multivariable information collecting unit, a multichannel signal transmission unit and a signal processing unit. The multivariable information collecting unit is various types of sensors distributed on each collecting point. The multichannel signal transmission unit is used for correspondingly transferring various types of data signals. An analogue signal and digital signal (AD) conversion module is arranged between the data collecting module and the central control module. According to the multivariable distributed type online monitoring system based on the wireless sensor network, wireless sensor network technology based on a ZigBee protocol is adopted. The multivariable distributed type online monitoring system based on the wireless sensor network is capable of monitoring multivariable information such as vibration time process, dynamic strain/ stress, temperature and pressure in an online mode.
Description
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Technical field
The present invention relates to wireless sensing and communication technical field, relate in particular to a kind of multivariable distributed on line monitoring system based on radio sensing network.
Background technology
Power engineering, hydraulic engineering etc. are important foundation industry and the public utilities that involve the interests of the state and the people, and its safety, stable operation are the important leverage conditions of national economy comprehensive coordinate, sustainable development.
The overhead transmission line of transmission line, especially voltage levels is the lifeblood of electric power system, and the quality of its operation conditions directly affects the safety of operation of power networks and stablizes.The natural calamity such as icing, typhoon is one of common potential safety hazard of transmission line, the in recent years appearance of limit weather in the world wide, and the wind of China's transmission line, ice damage evil have presented and have increased progressively trend.To sum up, the operation maintenance of overhead transmission line and monitoring management work are most important, and especially under the mal-conditions such as typhoon, ice and snow weather, the normal stable operation of guarantee overhead transmission line is the most important thing especially.
Hydraulic engineering, especially water power gate, aspect the flood control flood control, its safe and stable operation is not only the important leverage of hydroelectric station safe operation, but also be that the flood control flood control is steadily dispatched, water levels of upstream and downstream control etc. is concerning the reliable barrier of common people's security of the lives and property.Therefore the Real-Time Monitoring of water power gate seems particularly important.
Along with the development of national economy and the continuous lifting of scientific and technological level, heavy construction equipment etc. have all been obtained faster development in each side such as constructing tunnel, urban rail transit construction, urban constructions, its safe and stable operation is the important leverage that engineering project is healthy, continue progress, and these all be unable to do without can its work information of Real-time Feedback monitoring system.
In recent years, each domain expert scholar of China has carried out the anti-disaster monitoring architectural study for all kinds of engineerings, and has obtained a series of achievement.Publication number is the intelligent real time on-line monitoring system that the Chinese invention patent application of CN 1629647A has proposed a kind of high-voltage fence transmission line, carries out real time on-line monitoring mainly for the insulation property of insulator string on the high voltage power transmisson system mesohigh shaft tower.Publication number is the on-Line Monitor Device that the Chinese invention patent application of CN 101586971A has proposed a kind of powerline ice-covering early warning and dynamic compatibilization system, monitors for environmental informations such as the temperature of Research Work of Power Transmission Line environment, humidity, wind speed, wind direction, sunshines.Publication number is that the Chinese invention patent application of CN 101603850A has proposed a kind of extra high voltage transmission line online monitoring system, monitors for the combined load of transmission line wire, insulator string leakage current, weather information etc.Publication number is that the Chinese invention patent application of CN 102564493A has proposed a kind of overhead transmission line galloping on-line monitoring system, adopt acceleration transducer that line oscillation is accurately located, locator data is uploaded to main website by short range radio frequency, and by GPRS with the data that monitor and environment weather data upload to the backstage host computer.Publication number is that the Chinese invention patent application of CN 102818590A has proposed a kind of powerline ice-covering on-line monitoring system based on wireless sensor network, realizes powerline ice-covering situation remote real time monitoring by the state information that gathers wire and surrounding environment.Publication number is that the Chinese invention patent application of CN 102193542A discloses a kind of gate perception observing and controlling intelligent node, the employing technology of Internet of things has been proposed, gather each relevant data of gate by the data acquisition middle-end, can gather the gate state comprehensively, and realize fast real-time active control strategies.
The local problem that these representative achievements face for the practical structures engineering has carried out degree of depth ground and has analyzed, and has proposed effective solution.Yet the multivariable information such as the time of vibration course of pin engineering structure, dynamic stress/strain are not carried out on-line monitoring and then are obtained the overall process data that formation of marine disasters, engineering structure pathology and reflect structure damage.
Summary of the invention
Deficiency for the prior art existence, the present invention adopts the wireless sensor network technology based on Zigbee protocol, proposed the multivariable distributed on line monitoring system and method based on radio sensing network, the multivariable information such as time of vibration course, dynamic stress, strain that are used for engineering structure are carried out on-line monitoring.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
One, based on the multivariable distributed on line monitoring system of radio sensing network, comprises host computer and slave computer; Described slave computer comprises central control module, radio frequency transmission module, data acquisition module and power management module, data acquisition module, central control module, radio frequency transmission module link to each other successively, and power management module provides voltage and carries out voltage management data acquisition module, central control module, radio frequency transmission module.
The data that be used for above-mentioned central control module controlling data acquisition and storage of collected arrive comprise processor, peripheral circuit and memory module, and peripheral circuit all links to each other with processor with memory module.
Above-mentioned radio frequency transmission module is used for communicating with host computer, comprises interconnective wireless data transmission module and Anneta module.
Above-mentioned data acquisition module is used for image data and the data that gather are carried out filtering and amplification, comprise multivariable information acquisition unit, multi channel signals transmission unit and signal conditioning circuit, multivariable information acquisition unit, multi channel signals transmission unit, signal conditioning circuit link to each other successively; The multivariable information acquisition unit is the dissimilar transducer that is distributed in each collection point, sensor can gather multivariable information, the multivariable information acquisition unit comprises strain gauge transducer node and/or environmental sensor node, and the multivariable signal gathering unit specifically can comprise acceleration transducer and resistance strain sensor; The multi channel signals transmission unit is used for the dissimilar data-signal of corresponding transmission, the type of the sensor node that uses according to reality among the present invention, and the channel transmission unit can be the four-way single-pole double-throw switch (SPDT) of some; Signal is reconciled circuit and is used for the data-signal of multivariable information acquisition unit collection is carried out filtering and amplification, comprises filter circuit and amplifying circuit.
Be provided with the AD modular converter between above-mentioned data acquisition module and the central control module, be used for inputting central control module after analog signal conversion with data collecting module collected becomes digital signal.
Above-mentioned power management module is used to provide and distributes voltage, comprises Voltage stabilizing module and division module.Voltage stabilizing module comprises DC-voltage supply module and adjusting and voltage-reduction switch stabilized-voltage power supply controller, and the DC-voltage supply module is used to provide isolated working voltage, and the adjusting and voltage-reduction switch stabilized-voltage power supply controller is used to provide digital operation voltage.Division module is mainly low leakage voltage adjuster spare, obtains various voltages required in the system by the output voltage of adjusting Voltage stabilizing module.
In the slave computer, be equipped with light-coupled isolation between its corresponding peripheral circuit of core circuit, between the transmission core circuit of low speed signal and peripheral circuit, adopt controllable photoelectric coupler isolation, between the core circuit of transmit high-speed signals and peripheral circuit, adopt the high-speed photoelectric coupler isolation.
Above-mentioned host computer comprises interconnective wireless data transmission module and PC, and wireless data transmission module is connected the TTL keyset and connects with PC.PC by wireless data transmission module to slave computer transmit operation order, receive the feedback information of slave computer, and process in real time return data.
Two, based on the method for supervising of above-mentioned on-line monitoring system, obtain live monitor data thereby be used for gathering the parameter that affects engineering structure, comprise step:
In the above-mentioned steps three, after sample frequency is set, select to stop sampling configuration for manually stopping or automatically stopping; If select manually to stop, then slave computer receives that host computer sends stops to sample and stops sampling after the instruction; If select automatically to stop, then by the upper computer selecting sampling time, after arriving the sampling time, stop sampling
In the step 4, the conducting of the passage that host computer can be by control multi channel signals transmission unit and close to select to accept the collection signal of a certain class or several classes.
In the step 4, if the multivariable information that gathers is back to host computer, then the collection signal of the same passage of identical slave computer is stored in the same database in the slave computer PC, and produces the live telecast monitoring figure of monitored object.
After stopping sampling, for the situation that needs Long Real-time Monitoring, adopt low-power consumption mode, when beginning to sample, recover normal mode.
Compared with prior art, the present invention has following characteristics and beneficial effect:
The inventive method can be applicable to engineering structure, for example transmission line, gate of hydropower station, be used for monitoring to the influential parameter of its structure, such as wind vibration velocity degree, the wind changeable information such as acceleration, dynamic stress, dynamic strain, temperature, wind speed of shaking, the time domain and the frequency domain information that have kept engineering structure disaster generation overall process, realize the Real Time Monitoring of engineering structure, and can obtain the data that formation of marine disasters, engineering structure pathology and engineering structure are damaged overall process, for the disaster alarm mechanism of engineering structure provides a kind of effective technological means.
Description of drawings
Fig. 1 is the integral frame figure of implementation of the present invention;
Fig. 2 is power management module functional block diagram among the present invention;
Fig. 3 is the partial circuit figure of high speed optoelectronic coupling isolation;
Fig. 4 is method for supervising flow chart of the present invention;
Fig. 5 is the control command form that host computer sends;
Fig. 6 is the Real-time Monitoring Data figure that embodiment 1 obtains;
Fig. 7 is the transducer of some hydropower station gate among the embodiment 2 Local map of layouting, and wherein, 1 ~ 6 represents that respectively 1 ~ No. 6 transducer corresponding to slave computer layouts;
Fig. 8 is the Real-time Monitoring Data figure that embodiment 2 obtains.
Embodiment
Referring to Fig. 1, the multivariable distributed on line monitoring system based on radio sensing network of the present invention comprises host computer and slave computer.Slave computer comprises radio frequency transmission module, central control module, data acquisition module and power management module, data acquisition module, central control module, radio frequency transmission module link to each other successively, and power management module provides voltage and carries out voltage management data acquisition module, central control module, radio frequency transmission module.
Central control module is used for controlling data acquisition module and carries out data acquisition and storage of collected data, comprises processor, peripheral circuit and memory module, and peripheral circuit all links to each other with processor with memory module.Be provided with the AD modular converter between data acquisition module and the central control module, the analog signal of data acquisition module is inputted central control module after the AD modular converter converts digital signal to.In this implementation, 16 single-chip microcomputer MSP430 of processor adopting super low-power consumption; Memory module is the SD storage card; Peripheral circuit comprises radio-frequency module interface circuit, on-line debugging interface circuit, control signal interface circuit, reset circuit etc.The on-line debugging interface circuit is the jtag interface circuit in this implementation, and the control signal interface circuit is SD card memory circuit.
For reliability, the floating property of temperature that improves the long-term work of AD modular converter, reduce noise, mate better applied signal voltage, adopt in this implementation to have the ultra-low noise voltage-reference ADR444 chip of absorbing current and primary current ability as the outside reference source.
Comprise two class clock systems among the main control chip MSP430, a class is fundamental clock system and FLL clock system (FLL and FLL+), and another kind of is DCO digital oscillator clock system.Specifically can use a crystal oscillator, also can use two crystal oscillators.Clock system produces main control chip MSP430 and the required clock of each functional module, and the clock that produces can and close according to instruction unpack, thereby realizes the control to total power consumption.Native system is provided with 16Mhz and two kinds of crystal oscillating circuits of 32.768Khz based on DCO digital oscillator clock system.
Main control chip MSP430 is by SPI interface unit receive the to hang oneself collection signal of analog-to-digital conversion and high speed photo coupling isolation; send the collection signal that receives in the radio frequency transmission module wireless data transmission module by its UART interface unit, simultaneously image data is write in the SD storage card of piezo-resistance protection.Main control chip is transferred to four-way single-pole double-throw switch (SPDT) in the data acquisition module, the open and close of each passage in the control four-way single-pole double-throw switch (SPDT) by high speed optoelectronic coupling isolation with the function switch-over control signal; Finish online programming, debugging and the download etc. of lower computer system by jtag interface.In addition, the order that main control chip also is responsible for host computer is sent responds, and finishes the control to whole slave computer.
Data acquisition module comprises dissimilar sensor node, multi channel signals transmission unit and the signal conditioning circuit that is distributed in each collection point.Sensor node comprises strain gauge transducer node and/or environmental sensor node, and the strain gauge transducer node can be used to the wind vibration response data of gathering project structure, the parameters such as acceleration, stress and strain of shaking such as vibration velocity, wind.The environmental sensor node can be used to the parameters such as collecting temperature, wind speed.Sensor node in this implementation comprises acceleration transducer and resistance strain type sensor two classes, and sensor node drives control by main control chip.
Signal conditioning circuit is used for the signal of sensor node collection is carried out signal filtration and signal amplification.The multi channel signals transmission unit can be the four-way single-pole double-throw switch (SPDT) of some according to the type of the sensor node of reality employing, main control chip MSP430 can control the conducting of each passage in the four-way single-pole double-throw switch (SPDT) or close.In this implementation, for realizing the switching of acceleration transducer and two kinds of collection signals of resistance strain type sensor, adopt ADG788BCPZ four-way single-pole double-throw switch (SPDT) device to carry out signal and switch, the control signal of switching is come by prime main control chip MSP430 photoelectricity isolation transmit through controllable photoelectrical coupler TLP521-4.
The radio frequency transmission module is comprised of interconnective wireless data transmission module and Anneta module with the communication that realizes the upper and lower machine.In this implementation, for ensureing that the radio frequency delivery module has larger data transmitting range when can adapt to comparatively abominable natural environment, wireless data transmission module adopts based on the integrated RFTR5 wireless data transmission module of the high-power height of ZigBee communication protocol, power output is 500mW, this module provides multiband multichannel and network ID to reduce interference in the transmission course improving transmission performance, and can revise by host computer serial ports and relevant parameter are set; Anneta module is SAM straight peen antenna.The radio frequency delivery module carries out identification by net interior nodes address number, realizes the data communication in the net, number carries out net to the identification of internetwork device by the network address, realizes the communication function of net and net.
Power management module is used to provide and distributes voltage, comprise Voltage stabilizing module and division module, Voltage stabilizing module comprises DC-voltage supply module and adjusting and voltage-reduction switch stabilized-voltage power supply controller, the DC-voltage supply module is used to provide isolated working voltage, and the adjusting and voltage-reduction switch stabilized-voltage power supply controller is used to provide digital operation voltage.In this implementation, the DC-voltage supply module that adopts is PWB2405MD and PWB2412MD, be used for respectively providing for system the isolated working voltage of 5V and 12V, the adjusting and voltage-reduction switch stabilized-voltage power supply controller model that adopts is LM2576, is used for providing for system the digital voltage of 5V.Division module is low leakage voltage adjuster spare, has obtained the required voltage value according to each circuit and electronic device required voltage adjustment Voltage stabilizing module output voltage, and in this implementation, the low leakage voltage adjuster spare model that adopts is AMS1117.In the power management module, the collaborative DC-voltage supply of having realized wide region of Voltage stabilizing module and division module.The power management module functional block diagram as shown in Figure 2.
Host computer comprises wireless data transmission module and PC, and wireless data transmission module is connected the TTL keyset and connects with PC.PC by wireless data transmission module to slave computer transmit operation order, receiving feedback information, thereby can process in real time return data.
In this implementation, the data that native system carries out between upper and lower computer with the speed of 19200bps transmit.The signal that collects is through after the analog-to-digital conversion, through entering in the main control chip MSP430 by the SPI communication interface after the high-speed photoelectric coupler isolation, the signal that enters main control chip carries out data by its UART functional module and radio frequency delivery module and transmits, and the signal that collects is sent to host computer.Mass data is stored in the SD storage card after protecting through piezo-resistance simultaneously.
Can work long hours reliably under than strong electromagnetic and the stronger environment of vibration in order to improve native system, system of the present invention has adopted the following scheme that promotes reliability:
1) also comprises the MOSFET(metal oxide semiconductor field effect tube in the power management module), main control chip is by the control of control MOSFET realization to the insulating power supply power supply, thereby control rear end, realize simultaneously the isolation of core circuit and peripheral circuit, reliable isolation safe voltage is 2500V in this implementation.
All adopt light-coupled isolation between the core circuit that 2) links to each other with peripheral circuit in the native system, itself and peripheral circuit.Core circuit comprises the circuit that directly is connected with main control chip, the circuit of control signal transmission and the circuit of transmission collection signal.In low speed signal, adopt controllable photoelectric coupled device TLP521 isolation core circuit and peripheral circuit, adopt high-speed photoelectric coupler 6N137 isolation core circuit and peripheral circuit in high speed signal, the signal type of sensor die analog signal, A/D convertor circuit and digital circuit all adopts 6N137.Between core circuit and peripheral circuit light-coupled isolation is set, can increases substantially the signal to noise ratio of system.Circuit diagram as shown in Figure 3.
3) all Peripheral Interfaces and important level, chip pin all adopt protection circuit in the native system.Sensor interface adopts TVS (Transient Suppression Diode), ESD(static to discharge) late-class circuit is protected; The jtag interface of the online detail programming of processor support adopts piezo-resistance and ESD to protect; PWB2405MD and PWB2412MD DC-voltage supply module employing maximum load current are that the reset fuse of 4A is protected; The input of adjusting and voltage-reduction switch stabilized-voltage power supply controller suppresses the larger transient voltage that input may occur by bypass circuit, only depends on fly-wheel diode at output, and the inductive current when opening circuit provides the loop; The chips such as four-way single-pole double-throw switch (SPDT) ADG788BCPZ, modulus conversion chip AD7689BZ all have ESD (static release) protection circuit and transient voltage suppression circuit.AD takes the full isolation scheme of eight passages.
In this implementation, system's slave computer adopts lithium battery power supply, and supply power voltage is 9-16V.The supply voltage 1.8-3.6V of main control chip MSP430, the strain bridge operating voltage range of the transducer of data acquisition module and subsequent expansion is respectively 2.2-3.6V and 5-15V.Therefore be the normal stable operation of assurance system, power management module is absolutely necessary.Native system adopts PWB2405MD, PWB2412MD and LM2576 with wide-range input voltage to provide respectively stable 5V and the isolated working voltage of 12V and the digital operation voltage of 5V for system.
The 5V isolated working voltage that PWB2405MD provides provides the 3.3V digital voltage of isolation for sensor by low leakage voltage adjuster AMS1117, by the IND10*10(inductance component) etc. provide 5V aanalogvoltage through isolation for modulus conversion chip AD7689BZ etc.The 5V digital voltage that adjusting and voltage-reduction switch stabilized-voltage power supply controller LM2576 provides provides the aanalogvoltage of 3.3V for main control chip and optocoupler etc. by low leakage voltage adjuster AMS1117 etc.PWD2412MD provides the isolation voltage of 12V for the strain bridge circuit.
Power management module adopts adjustable resistance and fixed resistance dividing potential drop that cell voltage is monitored; to realize flexibly critical alarm voltage setting; in addition; power down process is not directly adopted in the voltage monitoring protection; but system enters the low power operation pattern automatically; and the wireless data transmission module by system's slave computer regularly sends the brownout warning, on the simultaneity factor slave computer circuit board red alarm lamp is installed.
System in this implementation adopts the sampling of eight channel separation, the signal of sensor node collection enters the main control chip of slave computer by DB25 military project joint, collection signal is through entering signal modulate circuit again behind TVS transient voltage protection circuit and the ESD electrostatic discharge protection circuit.The data that the resistance strain type sensor of wherein inputting via the DB1 interface collects are first after filtration wave circuit after direct-current bridge transfers the signal of telecommunication to, again by entering subsequent conditioning circuit behind the instrumentation amplifier INA125 with standard of precision voltage again.Collection signal carry out through integrated transporting discharging AD8608ARZ that signal is followed and the control that gains after carry out the signal protection by the votage limit type protection device again.Utilize the nonlinear characteristic of piezo-resistance, appear at two interpolars of piezo-resistance when overvoltage, piezo-resistance can be with voltage clamping to a relatively-stationary magnitude of voltage, thereby realizes the protection to the rear class analog to digital conversion circuit.Native system adopts 16 chip AD7689BCPZ of 8 passages that collection signal is carried out analog-to-digital conversion.Simultaneously, be to improve signal to noise ratio, noise adopts high-speed photoelectric coupler 6N137 that analog circuit and AD modular converter and digital circuit are carried out light-coupled isolation to the interference of analog signal and AD modular converter in the inhibition system.In addition, native system adopts amplifier AD8608 that two four tunnel, low imbalance, low noise, extremely low input bias current and high-speed characteristic combine as the main devices of signal conditioning circuit.
Among the present invention, the lower computer system software development is based on IAR Embedded Workbench development platform and the Z-stack protocol stack is realized, programming language adopts the C language.Host computer adopts MSComm control (serial communication control) by serial port transmission and receive data.
Based on on-line detecting system of the present invention, the invention allows for the method for supervising corresponding with it, be specially:
The method is at first sent the equipment searching instruction by host computer based on communications protocol, and slave computer will be come with the data back of address mark code, carries out simultaneously verification, to guarantee the correctness of transfer of data.Each slave computer is composed of different address codes, and when host computer sent same order with the form of broadcasting command to all slave computers, all slave computers all can return the feedback information with address mark after receiving instruction, and the instruction that receives of execution.Fig. 4 is the flow chart of method for supervising of the present invention.
Control command six bytes as shown in Figure 5 that host computer sends to slave computer, comprise beginning flag position, device id, instruction code, data and check bit sum termination flag position, beginning flag position and termination flag position are used for the initial sum of marking of control order and stop, the beginning flag position is first byte of six byte command, and setting its value is 68; Device id is second byte of six byte command, is used for specifying corresponding slave computer numbering; Instruction code is the 3rd byte of six byte command, is used for representing the type of ordering, as sample frequency is set, and acquisition time etc. is set; Data bit is the 4th byte of six byte command, is used for representing the data of respective operations type, as sample frequency is set is 1KHz, the sampling time is set is 1 hour etc.; With check digit be the 5th byte of six byte command, its value for second and third, four byte value sums, and omit overflow value, be used for ensureing the correctness of order; The termination flag position is the 6th byte of six byte command, and setting its value is 16.When host computer carries out Synchronization Control by sending the broadcasting command form to all slave computers, be about to device id and be set to 00; Host computer also can be realized by relevant device ID number selection a certain slave computer controlled separately simultaneously.Slave computer responds after receiving the operational order that host computer sends, and automatically sends feedback information to host computer simultaneously, is contention-free, and slave computer sends according to the time-delay of carrying out feedback information for equipment of itself ID number.
A kind of being embodied as that slave computer is sent according to the time-delay of carrying out feedback information for equipment of itself ID number: establish N slave computer, its corresponding device id is respectively 1,2 ...,
i..., N, set time-delay s, device id is that 1 slave computer exists
tConstantly send feedback information, then device id be 2 ...,
i..., the slave computer of N moment of sending feedback information is respectively
t+
s...,
t+ (
i-1)
s...,
t+ (N-1)
sBut like this with regard to contention-free.
Slave computer is crossed wireless data transmission module with the multivariable information exchange that gathers and is transferred to host computer, device id according to slave computer, the collection signal of the same passage of identical slave computer is stored in the same database of PC, and by with the seamless link of DAS, generate the live state information figure of monitored circuit.The multivariate data of monitored circuit is stored in the SD storage card of system's slave computer.
The inventive method can be applicable to engineering structure, for example transmission line, gate of hydropower station.During use, sensor node is distributed on the engineering structure.In the time of need to sampling, open system, and by host computer slave computer is carried out verification, after the verification succeeds, host computer sends acquisition instructions to slave computer, and slave computer carries out data acquisition according to instruction control multivariable information acquisition unit (being the sensor node of number of different types).In the multivariable information real-time storage that gathers and the memory module of central control module, and return or do not return host computer according to the Instruction Selection of host computer.Host computer can be by control multi channel signals transmission unit passage conducting and close to select to accept the collection signal of a certain class or several classes.
Below in conjunction with Application Example beneficial effect of the present invention is described.
System of the present invention is applied to Guangdong Province's transmission line 7 ~ November in 2012, adopt solar panel and lithium battery power supply, adopts the acceleration transducer node regularly the transmission line vibration data that gathers to be passed back to ground base station.Take the 49# shaft tower of the undamped device of this transmission line as example, wind time domain course (fair line direction) of shaking in Zhanjiang is seen Fig. 6 when obtaining 2012 17 days 10:00 ~ 18:00.This figure can verify reliability that system of the present invention works and the validity of data acquisition under wind shakes environment.The present invention can be and follow-uply falls the early warning mechanism of the disasters such as tower effective technological means is provided for shake wireless monitor, charming appearance and behaviour of power transmission line transportation work style.
System of the present invention successively is applied to the gate monitoring in domestic certain several hydroelectric station 9 ~ December in 2012, sensor node distributes as shown in Figure 7, and 1 ~ 6 represents that respectively 1 ~ No. 6 transducer corresponding to slave computer layouts among the figure.Adopt acceleration transducer monitoring gate to rise and the landing process, and the data that monitor are passed back to ground base station in real time, generate the real time information figure of gate landing process, the vibration time-history curves of the 4th measuring point of No. 3 slave computer as shown in Figure 8, abscissa is Beijing time.Reliability that the inventive method is worked and the validity of image data have been verified under complex electromagnetic environment and high humility, strong vibration environment.The present invention can keep time domain and the frequency domain information of gate landing overall process, for gate landing scheduling and disaster alarm provide effective reference frame.
Claims (11)
1. based on the multivariable distributed on line monitoring system of radio sensing network, comprise host computer and slave computer, described slave computer comprises central control module, radio frequency transmission module, data acquisition module and power management module, data acquisition module, central control module, radio frequency transmission module link to each other successively, power management module provides voltage and carries out voltage management data acquisition module, central control module, radio frequency transmission module, it is characterized in that:
Described central control module comprises processor, peripheral circuit and memory module, and peripheral circuit all links to each other with processor with memory module;
Described data acquisition module comprises multivariable information acquisition unit, multi channel signals transmission unit and signal conditioning circuit, and multivariable information acquisition unit, multi channel signals transmission unit, signal conditioning circuit link to each other successively; The multivariable information acquisition unit is the dissimilar transducer that is distributed in each collection point, and the multi channel signals transmission unit is used for the dissimilar data-signal of corresponding transmission;
Be provided with the AD modular converter between described data acquisition module and the central control module.
2. the multivariable distributed on line monitoring system based on radio sensing network as claimed in claim 1 is characterized in that:
Described multivariable information acquisition unit comprises that output variable is that transducer and the output variable of voltage is the transducer of resistance.
3. the multivariable distributed on line monitoring system based on radio sensing network as claimed in claim 2 is characterized in that:
Described output variable is the transducer of voltage, comprises the transducer that can record physical quantity vibration, speed, temperature, pressure; Described output variable is the transducer of resistance, comprises the transducer that can record physical quantity displacement, deformation, power, acceleration, humidity, temperature.
4. the multivariable distributed on line monitoring system based on radio sensing network as claimed in claim 1 is characterized in that:
Described channel transmission unit is the four-way single-pole double-throw switch (SPDT), realizes that by described processor control four-way single-pole double-throw switch (SPDT) signal selects to pass through.
5. the multivariable distributed on line monitoring system based on radio sensing network as claimed in claim 1 is characterized in that:
Described signal is reconciled circuit and is comprised filter circuit and amplifying circuit.
6. the multivariable distributed on line monitoring system based on radio sensing network as claimed in claim 1 is characterized in that:
Described power management module comprises Voltage stabilizing module and division module, Voltage stabilizing module comprises DC-voltage supply module and adjusting and voltage-reduction switch stabilized-voltage power supply controller, the DC-voltage supply module is used to provide isolated working voltage, and the adjusting and voltage-reduction switch stabilized-voltage power supply controller is used to provide digital operation voltage; Division module is mainly low leakage voltage adjuster spare, obtains various voltages required in the system by the output voltage of adjusting Voltage stabilizing module.
7. the multivariable distributed on line monitoring system based on radio sensing network as claimed in claim 1 is characterized in that:
In the described slave computer, be equipped with light-coupled isolation between its corresponding peripheral circuit of core circuit, between the transmission core circuit of low speed signal and peripheral circuit, adopt controllable photoelectric coupler isolation, between the core circuit of transmit high-speed signals and peripheral circuit, adopt the high-speed photoelectric coupler isolation.
8. based on the method for supervising of each described on-line monitoring system in the claim 1 ~ 7, obtain live monitor data thereby be used for gathering the parameter that affects engineering structure, it is characterized in that, comprise step:
Step 1, host computer sends the equipment search instruction to slave computer;
Step 2, the slave computer that receives search instruction will be delayed time in turn according to the address mark code with the data of address mark code and will be back to host computer, and different slave computers is provided with different address mark codes;
Step 3, host computer is sent to sample frequency and collection signal type all or the slave computer of appointment according to the address mark code of each slave computer, and slave computer carries out spot sampling according to sample frequency and sensor node corresponding to collection signal Type Control;
Step 4, the multivariable information real-time storage of sensor node collection in worksite are in the memory module of slave computer central control module, and the multivariable information of collection returns or be not back to host computer according to the instruction of host computer.
9. method for supervising as claimed in claim 8 is characterized in that:
In the step 3, after sample frequency is set, select to stop sampling configuration for manually stopping or automatically stopping; If select manually to stop, then slave computer receives that host computer sends stops to sample and stops sampling after the instruction; If select automatically to stop, then by the upper computer selecting sampling time, after arriving the sampling time, stop to adopt.
10. method for supervising as claimed in claim 8 is characterized in that:
In the step 4, the conducting of the passage that host computer can be by control multi channel signals transmission unit and close to select to accept the collection signal of a certain class or several classes.
11. method for supervising as claimed in claim 8 is characterized in that:
In the step 4, if the multivariable information that gathers is back to host computer, then the collection signal of the same passage of identical slave computer is stored in the same database in the slave computer PC, and produces the live telecast monitoring figure of monitored object.
Priority Applications (1)
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