CN104155041A - Wireless passive prestress detection system - Google Patents
Wireless passive prestress detection system Download PDFInfo
- Publication number
- CN104155041A CN104155041A CN201410364235.9A CN201410364235A CN104155041A CN 104155041 A CN104155041 A CN 104155041A CN 201410364235 A CN201410364235 A CN 201410364235A CN 104155041 A CN104155041 A CN 104155041A
- Authority
- CN
- China
- Prior art keywords
- wireless
- prestress
- data
- sensor
- middle distance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention belongs to the technical field of prestress detection and particularly relates to a wireless passive prestress detection system. A wireless passive prestress sensor is placed in concrete to collect the strain force of a steel cable; in order to protect the sensor, double-layer epoxy resin is applied to encase the sensor and the steel cable; a middle distance radio frequency reader and a tablet personal computer are respectively used as external data collection equipment and external data processing equipment; and the tablet personal computer is in communication with a system database server through a wireless data transmission service, calculates actual prestress value and returns the actual prestress value to the server. The wireless passive prestress detection system is used to detect the prestress of cables in buildings for a long term or periodically, so as to avoid safety accidents.
Description
Technical field
The invention belongs to prestress detection technical field, be specifically related to the detection system of cable prestressing in a kind of concrete.
Background technology
In building structure health detects, pre-stress sensor has a wide range of applications.Their discontinuity or the continuous prestress change to inside configuration are monitored, and provide first hand prestress information to maintainer, in order to prevent the generation of security incident.Current building prestress detection system, generally adopts wired mode, by sensor together with data circuit, power circuit in Transducers Embedded in Concrete.This mode is for affecting to building structure itself, and the deployment of sensor is also convenient not.Existing detection system mostly is separate unit, lacks unified management and the standardization of heat transfer agent.
Summary of the invention
Use wired, active deficiency in order to overcome pre existing stress sensing system, set up a set of unitizing, standardized information management mode, the invention provides a set of wireless and passive prestress detection system.
Wireless and passive prestress detection system provided by the invention, in concrete, adopt wireless and passive pre-stress sensor, use middle distance rf readers that the prestressed, reinforced information in concrete is read out in outside, use panel computer to process data, and utilize the wireless data transmission function of panel computer to send to system server.Particularly, whole system is made up of wireless and passive pre-stress sensor, middle distance rf readers, panel computer, four parts of system server.Wherein:
Described wireless and passive pre-stress sensor, is made up of sensor chip and transmitting coil, and sensor chip adopts double-deck epoxy resin protection, and transmitting coil is placed on outside double-deck epoxy resin protective seam.Wireless and passive pre-stress sensor self is with energy receiver module, data acquisition module and data transmission module, under the protection of epoxy resin, build into concrete with cable wire, have easy for installation, do not affect building integral structure, the feature that service time is long; Wherein, described energy receiver module is for receiving the low frequency radio frequency signal that middle distance rf readers is sent, described data acquisition module is for being converted into digital voltage value by the analog voltage from strain circuit, data transmission module, for the digital voltage value collecting is modulated to low frequency radio frequency signal, returns to external data collecting device.
Described middle distance rf readers realizes the wireless dual-use function that energy is provided and receives data, and data are transferred to panel computer processing.Middle distance rf readers is mainly made up of D power-like amplifier, radio-frequency module, wave detector, single-chip microcomputer, RS232 interface.D power-like amplifier is responsible for producing low frequency radio frequency signal, radio-frequency module is responsible for transmission and the acceptance of low frequency radio frequency signal, the low frequency signal that wave detector is responsible for loading data message carries out demodulation, the information that single-chip microcomputer obtains demodulation is processed, and RS232 interface is responsible for the connection of this middle distance rf readers and panel computer.Middle distance rf readers is by portable power source energy supply, and low induction reactance major diameter Ritz coil increases transmission range in addition.
Panel computer is equipped with prestress data processing and software for display, and utilizes wireless data transfer services and database server to carry out telecommunication, returns to server prestress information.
System server is provided with database software, is mainly responsible for the storage of prestress information, and carries out the mutual of data message with panel computer.
In system of the present invention, middle distance rf readers is utilized D power-like amplifier, produces low frequency radio frequency signal, utilizes radio-frequency module to be transmitted to wireless and passive pre-stress sensor, as energy source; Simultaneously, wireless and passive pre-stress sensor by the Data Modulation of collecting to this low frequency radio frequency signal, middle distance rf readers is carried out demodulation by wave detector to signal, and decode by single-chip microcomputer, obtain the particular number of this sensor and the corresponding primary voltage information of prestress that it obtains; Single-chip microcomputer is passed to panel computer the relevant information of extracting by data conversion line; Panel computer calls relevant driver, receive the data message from single-chip microcomputer, and utilize wireless data transmission function to pass to the system server of access internet the numbering of this sensor, and request with number corresponding voltage---(production error causes the transformation standard of each sensor can have error for prestress conversion formula and coefficient, need specific transformation ratio), obtain after transformation ratio, calculate actual prestress, show concrete numerical value at display interface, and raw data and actual prestress value are returned to server stores; System server access internet, the information of storing each sensor, the reading information of sensor and prestress transformation ratio, be responsible for the corresponding request from client, comprises and obtain design factor request and prestress information inquiring request.
The invention has the beneficial effects as follows: adopt wireless and passive pre-stress sensor, wireless mode makes the installation reduced complexity of system, in outside, has extended the serviceable life of system without wire long term exposure; Adopt the signal of low frequency signal as transmission, have good penetrability for concrete, in the case of sacrificing certain data rate, increased transmission range, under concrete medium, there is greater advantage compared with the communication mode such as bluetooth, ZIGBEE; The data management structure that adopts CS, makes unitarity and the managerial enhancing of system; To each sensor label and the calibration that appears on the scene, calibration coefficient is stored in server, when use, extract, each sensor is carried out to personal settings, improve measuring accuracy.
Brief description of the drawings
Fig. 1 is general frame figure of the present invention.
Fig. 2 is native system running schematic diagram.
Fig. 3 is radio frequency middle distance reader module schematic diagram.
Fig. 4 is wireless sourceless sensor scheme of installation.Wherein a forward sectional view, b is lateral cross-sectional view.
Number in the figure: 1 cable wire, 2 wireless sourceless sensors, 3 precast concretes, 4 low induction reactance major diameter Ritz coils, 5 radio frequency middle distance readers, 6 panel computers, 7 database servers, 8 portable power sources, 9 double-deck epoxy resin, 10 circuit layers, 11 coil layer, 12 coils, 13 sensor chips.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
In Fig. 2, wireless and passive pre-stress sensor (2) is fit in precast concrete (3) with cable wire (1), cable wire is after prefabricated component two ends are tightened up, the strain part of pre-stress sensor senses corresponding prestress, but in the time that outside does not have data acquisition equipment, whole sensor does not have energy, does not carry out work.When external data collecting device near time (at present designed distance can reach 35cm), for sensor wireless provides work capacity.Portable power source (8) is radio frequency middle distance reader (5) power supply, signal is transmitted to wireless and passive pre-stress sensor (2) by low induction reactance major diameter Ritz coil (4), wireless and passive pre-stress sensor (2) obtains energy, and the strain on cable wire (1) is converted into digital voltage signal, read the numbering of self simultaneously, mode by load-modulate uploads to digital voltage signal and the numbering of self in radiofrequency signal, and pass to data acquisition equipment, radio frequency middle distance reader demodulating and decoding signal, obtain numbering and the information of voltage of sensor, and pass to panel computer (6).Panel computer (6) utilizes wireless data transfer services, accesses internet, and is connected to the database server (7) of internet.In database server (7), store the numbering of each wireless sourceless sensor (2), corresponding calibration coefficient and historical strain data.Calibration coefficient from the calibration test of wireless sourceless sensor (2) in the time dispatching from the factory, and record corresponding voltage and turn prestressed calibration coefficient.Panel computer (6) obtains after corresponding calibration coefficient, calculates the prestress in this region, shows result on display interface, and result is returned to database server (7).
Fig. 3 is the each module diagram of radio frequency middle distance reader (5).The radio frequency low frequency signal that is loaded with data message enters radio-frequency module from low induction reactance major diameter Ritz coil (4), radio-frequency module passes to wave detector, demodulate data information transfer to single-chip microcomputer, single-chip microcomputer is responsible for decoding, is separated frame extraction useful information, passes to next stage equipment by serial ports; On the other hand, single-chip microcomputer produces low frequency signal ripple, passes to D class amplifirer, carries out power amplification, then passes to radio-frequency module transmitting.
Fig. 4 is wireless sourceless sensor scheme of installation.Wherein, cable wire (1) by one section of double-deck epoxy resin (9) surround, internal layer is circuit layer (10), place sensor chip (13), skin is coil layer (11), placement be the transmitting coil (12) of sensor.
Claims (1)
1. a wireless and passive prestress detection system, it is characterized in that adopting wireless and passive pre-stress sensor in concrete, use middle distance rf readers that the prestressed, reinforced information in concrete is read out in outside, use panel computer to process data, and utilize the wireless data transmission function of panel computer to send to system server; Whole system is made up of wireless and passive pre-stress sensor, middle distance rf readers, panel computer, four parts of system server; Wherein:
Described wireless and passive pre-stress sensor is made up of sensor chip and transmitting coil, and sensor chip adopts double-deck epoxy resin protection, and transmitting coil is placed on outside double-deck epoxy resin protective seam; Wireless and passive pre-stress sensor self, with energy receiver module, data acquisition module and data transmission module, under the protection of epoxy resin, is built into concrete with cable wire; Wherein, described energy receiver module is for receiving the low frequency radio frequency signal that middle distance rf readers is sent, described data acquisition module is for being converted into digital voltage value by the analog voltage from strain circuit, data transmission module, for the digital voltage value collecting is modulated to low frequency radio frequency signal, returns to external data collecting device;
Described middle distance reader is realized the wireless double function that energy is provided and receives data, and data are transferred to panel computer processing; Middle distance rf readers is mainly made up of D power-like amplifier, radio-frequency module, wave detector, single-chip microcomputer, RS232 interface; D power-like amplifier is responsible for producing low frequency radio frequency signal, radio-frequency module is responsible for transmission and the acceptance of low frequency radio frequency signal, the low frequency signal that wave detector is responsible for loading data message carries out demodulation, the information that single-chip microcomputer obtains demodulation is processed, and RS232 interface is responsible for the connection of this middle distance rf readers and panel computer; Middle distance rf readers is by portable power source energy supply;
Described panel computer is equipped with prestress data processing and software for display, and utilizes wireless data transfer services and database server to carry out telecommunication, returns to server prestress information;
Described system server is provided with database software, is mainly responsible for the storage of prestress information, and carries out the mutual of data message with panel computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410364235.9A CN104155041B (en) | 2014-07-28 | 2014-07-28 | A kind of wireless and passive prestress detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410364235.9A CN104155041B (en) | 2014-07-28 | 2014-07-28 | A kind of wireless and passive prestress detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104155041A true CN104155041A (en) | 2014-11-19 |
| CN104155041B CN104155041B (en) | 2016-03-30 |
Family
ID=51880603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410364235.9A Expired - Fee Related CN104155041B (en) | 2014-07-28 | 2014-07-28 | A kind of wireless and passive prestress detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104155041B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614103A (en) * | 2014-12-26 | 2015-05-13 | 复旦大学 | Wireless passive prestress sensor |
| CN106017568A (en) * | 2016-07-06 | 2016-10-12 | 沈阳建筑大学 | Structural health monitoring system of prefabricated assembly type concrete system, and integration method |
| CN110319879A (en) * | 2019-06-19 | 2019-10-11 | 青岛理工大学 | A kind of safety characteristics intelligent monitoring technology for building life cycle management |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6430459B1 (en) * | 1999-06-04 | 2002-08-06 | Sw Paper Inc. | Nip pressure sensing system |
| CN202255702U (en) * | 2011-07-16 | 2012-05-30 | 中国电子科技集团公司第五十二研究所 | Handheld steel supporting stress monitoring system |
| CN103308216A (en) * | 2013-06-03 | 2013-09-18 | 徐州牛头山铸业有限公司 | Cast iron pressure stress detecting system |
| CN203672525U (en) * | 2013-12-20 | 2014-06-25 | 中南大学 | Concrete stress sensor using piezoelectric characteristic of PVDF film |
-
2014
- 2014-07-28 CN CN201410364235.9A patent/CN104155041B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6430459B1 (en) * | 1999-06-04 | 2002-08-06 | Sw Paper Inc. | Nip pressure sensing system |
| CN202255702U (en) * | 2011-07-16 | 2012-05-30 | 中国电子科技集团公司第五十二研究所 | Handheld steel supporting stress monitoring system |
| CN103308216A (en) * | 2013-06-03 | 2013-09-18 | 徐州牛头山铸业有限公司 | Cast iron pressure stress detecting system |
| CN203672525U (en) * | 2013-12-20 | 2014-06-25 | 中南大学 | Concrete stress sensor using piezoelectric characteristic of PVDF film |
Non-Patent Citations (1)
| Title |
|---|
| 叶学松: "植入式无源无线声表面波温度传感检测系统", 《浙江大学学报》, vol. 45, no. 11, 30 November 2011 (2011-11-30), pages 2068 - 2072 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614103A (en) * | 2014-12-26 | 2015-05-13 | 复旦大学 | Wireless passive prestress sensor |
| CN104614103B (en) * | 2014-12-26 | 2017-10-10 | 复旦大学 | A kind of wireless and passive pre-stress sensor |
| CN106017568A (en) * | 2016-07-06 | 2016-10-12 | 沈阳建筑大学 | Structural health monitoring system of prefabricated assembly type concrete system, and integration method |
| CN106017568B (en) * | 2016-07-06 | 2018-12-25 | 沈阳建筑大学 | The structural healthy monitoring system and integrated approach of prefabricated assembled concrete system |
| CN110319879A (en) * | 2019-06-19 | 2019-10-11 | 青岛理工大学 | A kind of safety characteristics intelligent monitoring technology for building life cycle management |
| WO2020253409A1 (en) * | 2019-06-19 | 2020-12-24 | 青岛理工大学 | Technique for intelligently monitoring safety state of building throughout life cycle thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104155041B (en) | 2016-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5871941B2 (en) | Method and apparatus for accurate temperature measurement of cable joints based on RF technology | |
| CN201277062Y (en) | Mine water trouble monitoring and intelligent early-warning system | |
| CN202077045U (en) | Low-power consumption Internet-of-things terminal used for information acquisition | |
| CN104155041B (en) | A kind of wireless and passive prestress detection system | |
| CN104299408A (en) | Temperature monitoring device for high-voltage electrical equipment | |
| CN201215494Y (en) | Wireless detection system for temperature and humidity of granary | |
| CN203502545U (en) | Cable fault detector | |
| CN104614103B (en) | A kind of wireless and passive pre-stress sensor | |
| CN202793627U (en) | Bus joint temperature measuring wireless sensor network (WSN) node | |
| CN106324399A (en) | Electric power instrument capable of supporting remote control | |
| CN103456157A (en) | Long distance passive wireless sensor remote-measuring system | |
| CN109269651A (en) | A kind of passive type radio temperature sensor for measuring transformer temperature | |
| CN105509908A (en) | Passive temperature test system for key point of primary equipment in substation | |
| CN207586675U (en) | Ground line signals monitoring system based on Internet of Things NBIOT technologies | |
| CN203396419U (en) | Dangerous chemical vehicle integrated wireless sensor | |
| CN105634136A (en) | Zigbee-based ultra-low power consumption passive wireless temperature measurement pre-warning system for connection point of power transmission line | |
| CN105737997A (en) | Low-power red wine temperature monitoring device and method employing same | |
| CN203177914U (en) | Ultra-low power consumption camera-shooting and direct-reading water meter supporting wireless ad hoc network | |
| CN206877354U (en) | A kind of active RFID | |
| CN105318823A (en) | Ultra-low power consumption passive structural strain monitoring device | |
| CN204189300U (en) | A kind of high voltage electric equipment device for detecting temperature | |
| CN205120032U (en) | Ultra -low power consumption does not have source structure strain monitoring device | |
| CN204948084U (en) | A kind of micropower wireless communication module automatic batch detection system | |
| CN203520636U (en) | Traffic information collecting device based on wireless radio-frequency identification | |
| CN202230394U (en) | Novel wireless water level measurement and control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20170728 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |