CN201465278U - Remote wireless monitoring system - Google Patents
Remote wireless monitoring system Download PDFInfo
- Publication number
- CN201465278U CN201465278U CN2009200657111U CN200920065711U CN201465278U CN 201465278 U CN201465278 U CN 201465278U CN 2009200657111 U CN2009200657111 U CN 2009200657111U CN 200920065711 U CN200920065711 U CN 200920065711U CN 201465278 U CN201465278 U CN 201465278U
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- transport module
- foil gauge
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Abstract
The utility model discloses a remoter wireless monitoring system comprising a sensor module, a wireless transmission module and a collection terminal connected with the wireless transmission module, wherein the signal output end of the sensor module is connected in the signal input end of the wireless transmission module; the sensor module comprises a strain gage bridge circuit and a singlechip located at a place to be tested, the output end of the strain gage bridge circuit is connected into the signal input end of the singlechip through a analog-to-digital converter, and the singlechip is connected with a memory chip and a temperature chip. The remoter wireless monitoring system can remotely transmit the strain information and realize remote monitoring on projects limited by geology, and has convenient installation and stable and reliable run.
Description
Technical field
The utility model is a kind of remote wireless monitoring system, specifically is a kind of safety monitoring that is applied to the Geotechnical Engineering class, for example remote wireless monitoring system in monitoring rock and soil engineering fields such as bridge, tunnel, subway, side slope.
Technical background
Resistance strain-gauge transducer is to be the resistance sensor of conversion element with the resistance strain gage.Resistance strain type sensor is made up of elastic sensing element, strain ga(u)ge, compensating resistance and shell, can be designed to multiple version according to concrete measurement requirement.Elastic sensing element is subjected to measured power and produces distortion, and the strain ga(u)ge that adheres on it is out of shape together.Strain ga(u)ge is converted to distortion the variation of resistance value again, thereby can ergometry, multiple physical quantity such as pressure, moment of torsion, displacement, acceleration and temperature.Resistance strain type sensor commonly used has strain-type force sensor, strain pressure transducer, strain-type torque sensor (seeing torque sensor), strain-type displacement transducer (seeing displacement transducer), strain gauge acceleration transducer (seeing accelerometer) and thermometric strainometer etc.The advantage of resistance strain type sensor is the precision height, and measurement range is wide, and the life-span is long, and is simple in structure, and good frequency response can be worked under mal-condition, is easy to realize miniaturization, integration and diversification of varieties etc.It is widely used in water conservancy and hydropower, railway, traffic, the building monitoring.
But present resistance strain-gauge transducer has following shortcoming:
1) sensor generally in big strain have bigger non-linear, output signal is more weak so that error is amplified;
2) sensor front end is the actual measurement magnitude of voltage, must just can draw measurand according to artificial calibration curve, slow and easy tired easier the makeing mistakes of speed;
3) sensor front end all is the nonnumeric signal of simulating signal, can not remote transmission;
4) sensor has only manual numbering, and can not be intelligent coexist with product is not easy to the arrangement and the classification of data, obscures easily.
5) product all uses in the open air heavy minefield such as steel frame construction or water conservancy dam, all is struck by lightning easily.
And, not only need on-the-spot the detection in the monitoring field of bridge and tunnel isolith geotechnique journey, and also needing to overcome the site operation difficulty, the realization long distance wireless is monitored in real time, and therefore current urgent need is wanted a kind of strain acquirement monitoring system that can realize remote monitoring.
The utility model content
At above-mentioned prior art, the utility model purpose aims to provide a kind of remote wireless monitoring system, and energy remote transmission strain information is realized the engineering that is subjected to geological constraints is carried out remote monitoring, and this system can conveniently install simultaneously, and stable and reliable operation.
For achieving the above object, the technical solution adopted in the utility model is, a kind of remote wireless monitoring system, comprise sensor assembly, wireless transport module and the acquisition terminal that is attached thereto, wherein the signal output part of sensor assembly inserts the signal input part of wireless transport module, technical characterictic of the present utility model is that described sensor assembly comprises foil gauge bridge-type circuit and the single-chip microcomputer that is positioned at tested point, wherein the output terminal of foil gauge bridge-type circuit inserts the signal input part of single-chip microcomputer by analog to digital converter, described single-chip microcomputer is connected with storage chip and chip temperature, can detect the temperature and the storage data of this measuring point simultaneously.
Above-mentioned foil gauge bridge-type circuit can be the bridge architecture that is connected into by four foil gauges, also can be for by two foil gauges and two semibridge system structures that measuring resistance connects into.
Because the direct current half-bridge has the following advantages: the direct voltage source of high stability is easy to obtain; Half-bridge circuit can also carry out direct temperature compensation to measuring sheet by compensating plate; The adjustment circuit is simple; Sensor is little to the distribution parameter influence of metering circuit.So native system preferably adopts the direct current half-bridge circuit.
According to the preferred version of embodiment, described chip temperature is a DS18B20 type thermometer chip.That described single-chip microcomputer adopts is chip STC89C58RD.
Conventional wireless transport module general work electric current is all bigger, so the wireless transport module of native system employing is the SIM300 of Siemens, mainly is that this module of consideration is stable, and this module has sleep mode, saves electric weight under the rugged surroundings in the open air.The wireless transport module of this system comprises: SIM300 module and temperature collection circuit, memory circuit, lightning protection circuit, peripheral circuits such as imput output circuit and clock synchronization circuit.
Sensor assembly described in the utility model is resistance strain gage to be sticked on the elastic surface of the peculiar steel of sensor (these steel have certain DE, guarantee to change with measuring body, but general transfixion, with temperature and the little characteristic of external variation), resistance strain gage is sticked on a certain measuring point of tested steel place securely, along with iron and steel deforms, its deformation is delivered to peculiar steel, thereby the foil gauge resistance value also produces respective change.The change amount of the resistance value that records can calculate the line strain value of measuring point place along the foil gauge direction.Because the dependent variable of tested point is generally less (with 10
-6The magnitude meter), cause that the variable quantity of foil gauge corresponding resistor is also very little, adopt the semibridge system DC circuit to measure, be about to foil gauge or foil gauge and measuring resistance and be connected into bridge circuit, it is converted into voltage signal with the resistance signal of foil gauge.
Sensor assembly calculates the direct physical amount according to the aanalogvoltage that collects in conjunction with calibration scale, need not second Conversion.Wireless transport module sends near mobile wireless network base station with this physical quantity and other packing data again.The mobile base station is connected with the internet network again, all targetedly location, i.e. the ip address of internet public network when wireless transport module sends packet.
Data enter data acquisition software by the corresponding port of ICP/IP protocol.Software is resolved the effective field of its packet again.
In the sensor assembly electronic potentiometer can be set,, thereby can adjust range, also can be convenient for measuring calculating with the adjustment zero-point voltage.Storage chip in sensor assembly also stores the calibration information table, that is: what the corresponding great voltage difference of strain value takes place.After sensor assembly collected voltage difference, another mistake calculated strain value to reckoning.
Above-mentioned wireless transport module and sensor assembly split to be installed, and is not subjected to distance limit, be convenient to the operator and adjust according to the scene, and each sensor assembly has a global unique number.
Native system has also been realized following function on the basis of original wireless transport module: one, clock synchronization function, by synchronous with the management end retention time, system can carry out data acquisition to front-end module when arriving a certain moment automatically.Two, increased the extensibility interface, can realization and Zigbee and Ethernet external.
In sum, remote wireless monitoring system described in the utility model can the remote transmission strain information, and the engineering that is subjected to geological constraints is carried out remote monitoring, and this system is convenient to install simultaneously, and stable and reliable operation.
Description of drawings
Fig. 1 is a foil gauge bridge-type circuit diagram;
Fig. 2 is the foil gauge scheme of installation in the sensor assembly;
Fig. 3 is the sensor assembly principle schematic;
Fig. 4 is the principle schematic of wireless transport module;
Fig. 5 is the data link synoptic diagram;
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described.
A kind of long distance wireless transmission of monitoring system is made up of sensor assembly, wireless transport module, monitoring host computer (data capture management software) three parts.Sensor assembly mainly is responsible for image data, and the data of gathering are carried out mould/number conversion, is adding communication protocol so that carry out remote data transmission.Wireless transport module mainly is responsible for the transmission and the reception of remote radio communication data, and keeps clock synchronization with monitoring host computer; Monitoring host computer is by issue an order, pick-up transducers data in real time, and the data that receive are saved in background data base.
Foil gauge bridge-type structure is a foil gauge as if R1, R2 as shown in Figure 1, and R3, R4 are measuring resistance, and then foil gauge and measuring resistance constitute half-bridge structure; If R1, R2, R3, R4 are foil gauge, then constitute full bridge structure.Sensor assembly in the present embodiment is the half-bridge structure that foil gauge and resistance constitute.
When the resistance value of four brachium pontis of electric bridge satisfies:
When this concerned, bridge balance did not promptly have voltage between B, D.When wherein a certain resistance changes, the electric bridge out of trim, thus between B, D voltage U is arranged
BDAnd guarantee U by electronic potentiometer
BDFor just being convenient to amplifying signal.According to U
BDSize can calculate corresponding resistance change and corresponding line strain size.The variation U of voltage
BDDeformation quantities big or small and tested steel have certain linear.Sensor assembly is carried out basic configuration and sets its relevant parameter as input media by acquisition terminal, and calibration scale is stored in storage chip in the sensor assembly, sensor assembly reads voltage U at every turn
BDThe MCU of module calculates the microstrain amount of tested iron and steel measuring point again according to calibration scale, thereby can measure the suffered power of tested iron and steel measuring point, or suffered pressure also can be direct micrometer strain.
Conventional strain transducer output be generally the magnitude of voltage output voltage values, also to just can obtain physical quantity, and balancing circuit complexity (manually resistor is unstable more, and this module zeroing is the electronic potentiometer that adopts) through converting, can not obtain the measuring point temperature.Sensor assembly can effectively address the above problem in the present embodiment, and has the function of temperature compensation, and measuring accuracy can improve a grade.
After sensor assembly changes into digital signal to dependent variable, re-send to wireless transport module, the wireless transport module utilization be existing GSM network or cdma network.The described wireless transport module of present embodiment utilizes inner GPRS module and mobile (or UNICOM) to connect, to connect by moving with internet, and whole trace information is exactly IP address (or domain name), so the data in wireless transport module all are to send toward an IP address (or domain name).Set up when software terminal and wireless transport module and just can intercom mutually after linking, wireless transport module sends to corresponding IP address (or domain name) with the data of sensor assembly, and upper layer software (applications) is to the parsing of data then.
Foil gauge installation method in the described sensor assembly of present embodiment as shown in Figure 2, compensating plate R3, R4 are positioned at elastomeric non-strain zone, and foil gauge is positioned at elastomeric strain zone, therefore, when deformation takes place because of stressed relation in foil gauge, R1 and R2 make resistance generation respective change along with measuring point deformation, R3 and R4 change very little, cause occurring U
BDChanging. R3, R4 temperature compensation sheet are to be attached to foil gauge identical with tested construction material but on the test specimen that do not stress in the reality, this foil gauge serves as thermo-compensator and uses. in measuring process, compensating plate should be placed near the measured point, guaranteeing when environment temperature changes, the balance that identical variation is unlikely to influence electric bridge for taking place in the resistance R 1 of measurement sheet and compensating plate and R2.
Wireless transport module changes 232 or 485 commentaries on classics usb converters by 485 and links to each other with the pc machine, communicate, like this can be so that the operator according to actual conditions, utilizes PC to revise the setting of the calibration scale of IP terminal address (perhaps domain name) and sensor assembly as input media.Simultaneously can also expand for example external zigbee or Ethernet to wireless transport module.
Different products can be expanded or make into to described sensor assembly also, for example strong class sensor of dynamometry class sensor and pressure measurement and deformation class sensor.
The sensor assembly principle is as shown in Figure 3 in the present embodiment:
Voltage by foil gauge collection in the sensor assembly is linked in the circuit, after bipolar signal is added on the single supply analog to digital converter AD623, export single source voltage, single supply analog to digital converter AD623 can remove common mode voltage, and the useful signal in the input signal is amplified 100 times.Signal after the amplification modulus conversion chip ADS1100A0IDBVT by 16 again carries out analog to digital conversion, communicates by letter with single-chip microcomputer STC89C58RD by IIC communication protocol, with the compliance voltage input single-chip microcomputer of gathering.
A port at single-chip microcomputer also is connected to the thermometer that is positioned at the foil gauge strain location, is used for monitoring in real time this variation of temperature, and it mainly is for the data of temperature compensation being provided, further replenishing the Monitoring Data information of improving.
Single-chip microcomputer reads the calibration scale that is stored in the storage chip, in conjunction with the compliance voltage that collects, exports deformation quantity at last.
The input end of described foil gauge is connected with electronic potentiometer.The operator can reach the effect of adjusting bridge balance by adjusting the resistance of electronic potentiometer, guarantees that it is zero that the initial read power taking is pressed, and plays the zeroing effect.
Because the information between sensor assembly and the wireless transport module all is to change in order to adapt to on-the-spot possibility situation, 12V can adapt to telecommunication to the pressure drop of 5V and the communication distance of RS485.
The principle of wireless transport module as shown in Figure 4, sensor assembly sends to the data that collect a serial ports of the two serial ports single-chip microcomputers in the wireless transport module by the RS485 agreement, RS485 is used in the centre changes 232 agreements, the function that single-chip microcomputer STC485EESA mainly finishes is that data are received and sent to wireless transport module by serial ports 2 (TX2/RX2) from serial ports 1 (TX1/RX1), clock chip is by P12 and the P13 simulation scl clock line and the sda data line of single-chip microcomputer, time keeping is provided for respectively the data that read, and may be completed to the function that time point is measured automatically.18B20 type thermometer chip not only can provide the temperature of wireless transport module, and can provide 16 bit number unique number to wireless transport module, can prevent that the people is for obscuring.Single-chip microcomputer can be to the sensor assembly setting from numbering, be convenient to the information of memory module, certainly the information of numbering of sensor assembly and the time of reading automatically and the wireless transport module configuration information of reaching the standard grade all is arranged in the storage chip 24C256, what single-chip microcomputer and communicating by letter of storage chip 24C256 were also adopted is IIC communication protocol, port P12 and P13 simulation scl clock line and sda data line are distinguished clock chip and are relied on their address bit difference.
What wireless transport module adopted in the present embodiment is the SIM300 module of Siemens, it is three frequencies/four frequency GSM/GPRS modules that a volume is small and exquisite, adopt board to board connector, can be widely used in WLL such as Public CDMA WLL, merchant's words, assess station uses, M2M (machine) such as vehicular applications, remote meter reading, security monitoring, remote-control romote-sensing use, and application such as handheld device.Need connect earlier before linking to each other with the computer client, SIM need dispose its server address, and IP address of terminal that sends to or domain name, with and the numbering certainly and the network-side slogan of convenient identification.
In the time of need connecting, the AT order that single-chip microcomputer is pressed SIM300 to be needed sends order.After connecting, the data that sensor assembly collects can be arbitrarily and the acquisition terminal communication.The biography data of just can not communicating by letter that do not connect resend the order that connects once, until successful connection every 10 minutes.
Data link after connecting as shown in Figure 5, for the public network IP that solves each dialing again or enter the Internet is the problem that produces at random, present embodiment has adopted the domain name mapping function of peanut shell, and each the connection is not the destination with the IP address, but, on the peanut shell server, then know the public network IP of this acquisition terminal online at computer terminal operation peanut shell software.It mainly is according to the port numbers of agreement in advance that the Internet enters after the route, through route corresponding ports number is mapped to corresponding IP in the LAN (Local Area Network).
Claims (5)
1. remote wireless monitoring system, comprise sensor assembly, wireless transport module and the acquisition terminal that is attached thereto, wherein the signal output part of sensor assembly inserts the signal input part of wireless transport module, it is characterized in that, described sensor assembly comprises foil gauge bridge-type circuit and the single-chip microcomputer that is positioned at tested point, wherein the output terminal of foil gauge bridge-type circuit is by the signal input part of analog to digital converter access single-chip microcomputer, and described single-chip microcomputer is connected with storage chip and chip temperature.
2. according to the described remote wireless monitoring system of claim 1, it is characterized in that what described foil gauge bridge-type circuit adopted is the direct current half-bridge circuit.
3. according to claim 1 or 2 described remote wireless monitoring systems, it is characterized in that described chip temperature is a DS18B20 type thermometer chip.
4. according to claim 1 or 2 described remote wireless monitoring systems, it is characterized in that that described single-chip microcomputer adopts is chip STC89C58RD.
5. according to claim 1 or 2 described remote wireless monitoring systems, it is characterized in that that described wireless transport module adopts is the SIM300 of Siemens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200657111U CN201465278U (en) | 2009-08-26 | 2009-08-26 | Remote wireless monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200657111U CN201465278U (en) | 2009-08-26 | 2009-08-26 | Remote wireless monitoring system |
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| CN201465278U true CN201465278U (en) | 2010-05-12 |
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| CN2009200657111U Expired - Fee Related CN201465278U (en) | 2009-08-26 | 2009-08-26 | Remote wireless monitoring system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539977A (en) * | 2012-01-13 | 2012-07-04 | 深圳市中科源能达电子技术有限公司 | Thunder and lightning on-line monitoring system |
| CN102607859A (en) * | 2012-03-07 | 2012-07-25 | 山推楚天工程机械有限公司 | Method and device for testing stress of subframe of concrete mixer |
| CN102628697A (en) * | 2011-03-17 | 2012-08-08 | 兰州理工大学 | Method for dynamic memory of physical quantity and system thereof |
| CN103728941A (en) * | 2013-12-23 | 2014-04-16 | 平湖市紫欣自动化科技有限公司 | Material level monitoring method and equipment |
| CN104089726A (en) * | 2014-06-27 | 2014-10-08 | 国家电网公司 | On-line temperature measurement system for power device ground voltage part |
| CN104869158A (en) * | 2015-05-06 | 2015-08-26 | 内蒙古德辰信息网络科技有限责任公司 | Beam member monitoring method based on Internet of Things cloud technology and monitoring system thereof |
| CN105006125A (en) * | 2015-07-13 | 2015-10-28 | 中山市拓维电子科技有限公司 | On-site test apparatus data network transmission system |
| CN105547139A (en) * | 2015-12-05 | 2016-05-04 | 浙江大学 | Wi-Fi-based wireless strain measurement system |
| CN106949981A (en) * | 2016-01-07 | 2017-07-14 | 广东顺德云迪爱智能科技有限公司 | It is a kind of can thermometric offline system and method |
| CN107202659A (en) * | 2017-05-26 | 2017-09-26 | 浙江万向精工有限公司 | A kind of Non-driving hub bearing unit rotation riveting force measuring system and its measuring method |
| CN108109343A (en) * | 2017-12-08 | 2018-06-01 | 南京科达新控仪表有限公司 | A kind of method of simple type mountain landslide supervision |
| CN110546471A (en) * | 2017-05-30 | 2019-12-06 | 美蓓亚三美株式会社 | Temperature measuring device using strain gauge |
| CN115184461A (en) * | 2022-07-06 | 2022-10-14 | 水利部交通运输部国家能源局南京水利科学研究院 | Centrifugal test device and method for core wall dam collapse |
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- 2009-08-26 CN CN2009200657111U patent/CN201465278U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628697A (en) * | 2011-03-17 | 2012-08-08 | 兰州理工大学 | Method for dynamic memory of physical quantity and system thereof |
| CN102539977A (en) * | 2012-01-13 | 2012-07-04 | 深圳市中科源能达电子技术有限公司 | Thunder and lightning on-line monitoring system |
| CN102539977B (en) * | 2012-01-13 | 2014-07-30 | 深圳市中科源能达电子技术有限公司 | Thunder and lightning on-line monitoring system |
| CN102607859A (en) * | 2012-03-07 | 2012-07-25 | 山推楚天工程机械有限公司 | Method and device for testing stress of subframe of concrete mixer |
| CN102607859B (en) * | 2012-03-07 | 2014-02-12 | 山推楚天工程机械有限公司 | Method and device for testing stress of subframe of concrete mixer |
| CN103728941A (en) * | 2013-12-23 | 2014-04-16 | 平湖市紫欣自动化科技有限公司 | Material level monitoring method and equipment |
| CN104089726A (en) * | 2014-06-27 | 2014-10-08 | 国家电网公司 | On-line temperature measurement system for power device ground voltage part |
| CN104869158A (en) * | 2015-05-06 | 2015-08-26 | 内蒙古德辰信息网络科技有限责任公司 | Beam member monitoring method based on Internet of Things cloud technology and monitoring system thereof |
| CN105006125A (en) * | 2015-07-13 | 2015-10-28 | 中山市拓维电子科技有限公司 | On-site test apparatus data network transmission system |
| CN105547139A (en) * | 2015-12-05 | 2016-05-04 | 浙江大学 | Wi-Fi-based wireless strain measurement system |
| CN105547139B (en) * | 2015-12-05 | 2019-02-22 | 浙江大学 | A kind of wireless strain measuring system based on Wi-Fi |
| CN106949981A (en) * | 2016-01-07 | 2017-07-14 | 广东顺德云迪爱智能科技有限公司 | It is a kind of can thermometric offline system and method |
| CN107202659A (en) * | 2017-05-26 | 2017-09-26 | 浙江万向精工有限公司 | A kind of Non-driving hub bearing unit rotation riveting force measuring system and its measuring method |
| CN110546471A (en) * | 2017-05-30 | 2019-12-06 | 美蓓亚三美株式会社 | Temperature measuring device using strain gauge |
| CN110546471B (en) * | 2017-05-30 | 2020-09-22 | 美蓓亚三美株式会社 | Temperature measuring device using strain gauge |
| CN108109343A (en) * | 2017-12-08 | 2018-06-01 | 南京科达新控仪表有限公司 | A kind of method of simple type mountain landslide supervision |
| CN115184461A (en) * | 2022-07-06 | 2022-10-14 | 水利部交通运输部国家能源局南京水利科学研究院 | Centrifugal test device and method for core wall dam collapse |
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Granted publication date: 20100512 Termination date: 20120826 |