CN105277168A - Quasi-dynamic strain measurement instrument - Google Patents
Quasi-dynamic strain measurement instrument Download PDFInfo
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- CN105277168A CN105277168A CN201410291552.2A CN201410291552A CN105277168A CN 105277168 A CN105277168 A CN 105277168A CN 201410291552 A CN201410291552 A CN 201410291552A CN 105277168 A CN105277168 A CN 105277168A
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Abstract
The invention discloses a quasi-dynamic strain measurement instrument. The quasi-dynamic strain measurement instrument comprises eight signal conditioning units, an acquisition unit connected with the eight signal conditioning units, a master control system unit connected with the acquisition unit, an Ethernet transmission unit connected with the master control system unit, and a CAN bus transmission unit connected with the master control system unit. The acquisition unit has sampling frequency up to kilohertzes, so that quasi-dynamic signals having higher frequency can be measured effectively and correctly; the Ethernet transmission unit and the CAN bus transmission unit are cooperated, so that the problems of short on-site remote control distance and high remote data error rate can be improved obviously; and the quasi-dynamic strain measurement instrument is suitable for reliable transmission of the remote data, and is low in overall cost.
Description
Technical field
The present invention relates to a kind of Quasi dynamic strain measurement instrument, can be used for civil engineering work as the bearing pressure change safety monitoring of the institute such as highway, bridge and building foundation pit, and structural mechanics scientific research, teaching performance measuring instrumentation.
Background technology
Civil engineering work is as highway, bridge and building foundation pit etc., and be in the complex environment of field for a long time, its security performance is most important, carries out long term monitoring to find that potential hidden danger is just even more important to these facilities; Due to general field distance, communication inconvenience, long term monitoring is had any problem.
It is along with the scientific research development of demand of the emphasis defence engineerings such as national two bombs and one satellite, Aero-Space, weapon development is got up from 20th century 60, the seventies that structural mechanical property measures industry, to the measurement of various material stress, strain parameter, analyze very important.
In latter stage in last century to the beginning of this century, this kind of measuring equipment generally adopts traditional static strain measurement instrument, coordinates serial ports to carry out data communication as RS232 interface or serial ports turn USB.There are the following problems for it:
1, sample frequency is too low, cannot measure for slightly high-frequency Quasi dynamic signal at all;
2, Long-distance Control is apart from short;
3, the teledata bit error rate is high;
Therefore, how to provide that a kind of picking rate is fast, Long-distance Control distance, reliable while relative cost is lower again strain measurement instrument, become the problem that those skilled in the art need to solve.
Summary of the invention
Technical scheme to be solved by this invention is to provide a kind of Quasi dynamic strain gauge, to solve the deficiency of traditional static strain measurement instrument.
To achieve these goals, the invention provides a kind of Quasi dynamic strain gauge, comprising:
Carrying out amplification process for aiming at Dynamic Signal, obtaining 8 road signal condition unit of the pseudo-dynamic simulation signal suitably amplified;
Be connected with described 8 road signal condition unit, for carrying out the collecting unit of digitized signal conversion to the pseudo-dynamic simulation signal amplified;
Be connected with described collecting unit, the main system control module that the Quasi dynamic digitized signal for changing collecting unit processes;
Be connected with master control system unit, for carrying out the CAN transmission unit of data communication to the Quasi dynamic digitized signal after master control system cell processing;
Be connected with master control system unit, for carrying out the Ethernet transmission unit of data communication to the Quasi dynamic digitized signal after master control system cell processing.
Preferably, described 8 road signal condition unit comprise low-voltage and to lack of proper care the precision instrument amplifier of low offset drift low gain drift high-gain precision and high cmrr characteristic.
Preferably, described collecting unit comprises more than 144kSPS and has 8 passage, 24 high resolution converters of sampling functions simultaneously.
Preferably, described Ethernet transmission unit comprises 10Mb/100Mb ethernet controller interface chip.
Preferably, CAN transmission unit comprises high-speed CAN isolation transceiver.
Preferably, described Quasi dynamic strain gauge also comprises: be connected with power supply, and the voltage signal that power supply exports is converted to accurate positive voltage and negative voltage.
From above-mentioned technical scheme, compared with traditional static strain gauge, the invention discloses a kind of Quasi dynamic strain gauge.This Quasi dynamic strain gauge comprises: 8 road signal condition unit, the collecting unit be connected with 8 road signal condition unit, the master control system unit be connected with collecting unit, the Ethernet transmission unit be connected with main system control module and the CAN transmission unit be connected with main system control module.Wherein, 8 road signal condition unit carry out amplification process for aiming at Dynamic Signal, obtain the pseudo-dynamic simulation signal suitably amplified, collecting unit carries out digitized signal conversion to the pseudo-dynamic simulation signal amplified again, collecting unit is up to the sample frequency of KHz, effective correct measurement can be carried out to slightly high-frequency Quasi dynamic signal, master control system unit is used for processing the Quasi dynamic digitized signal of collecting unit conversion, then CAN transmission unit is used for carrying out cascade data communication to the Quasi dynamic digitized signal after master control system cell processing, Ethernet transmission unit carries out data communication for changing CAN data into Ethernet protocol packet, simultaneously Ethernet transmission unit also can be used for the Quasi dynamic digitized signal after to master control system cell processing and carries out data communication, Ethernet transmission unit and CAN transmission unit coordinate operation, CAN has real-time, transmission range is far away, anti-electromagnetic interference capability is strong, the bit error rate is low, low cost and other advantages, maximum transmission distance can reach 10Km, utilize the advantage of ether internet, the equipment of ensure that carries out telecommunication performance, data transmission security is reliable, obviously can improve on-the-spot Long-distance Control apart from short and that the teledata bit error rate is high problem, be applicable to the reliability transmission of teledata, and overall cost is lower.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, introduce doing the accompanying drawing used required in embodiment or description of the prior art simply below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skills, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the structural representation of an embodiment of a kind of Quasi dynamic strain gauge provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, says that the embodiment described is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The structural representation of an embodiment of a kind of Quasi dynamic strain gauge of the present invention is shown see Figure of description.
This Quasi dynamic strain gauge comprises: 8 road signal condition unit, the collecting unit be connected with 8 road signal condition unit, the master control system unit be connected with collecting unit, the Ethernet transmission unit be connected with main system control module and the CAN transmission unit be connected with main system control module.Wherein:
8 road signal condition unit carry out amplification process for aiming at Dynamic Signal, obtain the pseudo-dynamic simulation signal suitably amplified, and this pseudo-dynamic simulation signal suitably amplified is delivered to collecting unit;
Collecting unit carries out digitized signal conversion to the pseudo-dynamic simulation signal amplified, and collecting unit, up to the sample frequency of KHz, can carry out effective correct measurement to slightly high-frequency Quasi dynamic signal;
Master control system unit is used for processing the Quasi dynamic digitized signal of collecting unit conversion, then CAN transmission unit is used for carrying out data communication to the Quasi dynamic digitized signal after master control system cell processing, and Ethernet transmission unit is used for carrying out data communication to the Quasi dynamic digitized signal after master control system cell processing.
Further, described 8 road signal condition unit comprise low-voltage and to lack of proper care the precision instrument amplifier of low offset drift low gain drift high-gain precision and high cmrr characteristic.
Further, described collecting unit comprises 8 passage, 24 high resolution converters that 144kSPS has sampling functions simultaneously;
Further, described Ethernet transmission unit comprises 10Mb/100Mb ethernet controller interface chip.
Further, CAN transmission unit comprises high-speed CAN isolation transceiver.
Further, described Quasi dynamic strain gauge also comprises: be connected with power supply, and the voltage signal that power supply exports is converted to accurate positive voltage and negative voltage.
It should be noted that, in actual applications, this Quasi dynamic strain gauge needs power supply to provide accurate positive voltage and negative voltage signal, thus needs the power supply of two types, and for this reason, this Quasi dynamic strain gauge can arrange power-switching circuit.The voltage signal that power supply exports can be converted to accurate positive voltage and negative voltage signal by this cell translation circuit, adopts a kind of power supply of general precision can meet the requirement of Quasi dynamic strain gauge like this.
Sample frequency is there is too low little compared to traditional static strain measurement instrument, slightly high-frequency Quasi dynamic signal cannot be measured at all, Long-distance Control is apart from the short and teledata bit error rate high problem, first Quasi dynamic strain gauge provided by the invention is aimed at Dynamic Signal and is carried out amplification process, obtain the pseudo-dynamic simulation signal suitably amplified, collecting unit comprises 8 passage, 24 high resolution converters that 144kSPS has sampling functions simultaneously, digitized signal conversion is carried out to the pseudo-dynamic simulation signal amplified, collecting unit is up to the sample frequency of KHz, effective correct measurement can be carried out to slightly high-frequency Quasi dynamic signal, then comprise the CAN transmission unit of high-speed CAN isolation transceiver for carrying out data communication to the Quasi dynamic digitized signal after master control system cell processing, the Ethernet transmission unit comprising 10Mb/100Mb ethernet controller interface chip carries out data communication for changing CAN data into Ethernet protocol packet, simultaneously Ethernet transmission unit also can be used for the Quasi dynamic digitized signal after to master control system cell processing and carries out data communication, Ethernet transmission unit and CAN transmission unit coordinate operation, CAN has real-time, transmission range is far away, anti-electromagnetic interference capability is strong, the bit error rate is low, low cost and other advantages, maximum transmission distance can reach 10Km, utilize the advantage of ether internet, the equipment of ensure that carries out telecommunication performance, data transmission security is reliable, obviously can improve Long-distance Control apart from short and that the teledata bit error rate is high problem, be applicable to the reliability transmission of teledata, and overall cost is lower.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what embodiment stressed is all the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of embodiment, the General Principle defined in this explanation can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to embodiment illustrated herein, but will accord with principle disclosed herein and the consistent the widest scope of features of novelty.
Claims (6)
1. a Quasi dynamic strain gauge, is characterized in that, comprising: carrying out amplification process for aiming at Dynamic Signal, obtaining 8 road signal condition unit of the pseudo-dynamic simulation signal suitably amplified; Be connected with described 8 road signal condition unit, for carrying out the collecting unit of digitized signal conversion to the pseudo-dynamic simulation signal amplified; Be connected with described collecting unit, the main system control module that the Quasi dynamic digitized signal for changing collecting unit processes; Be connected with master control system unit, for carrying out the CAN transmission unit of data communication to the Quasi dynamic digitized signal after master control system cell processing; Be connected with master control system unit, for carrying out the Ethernet transmission unit of data communication to the Quasi dynamic digitized signal after master control system cell processing.
2. Quasi dynamic strain gauge according to claim 1, is characterized in that, described 8 road signal condition unit comprise low-voltage and to lack of proper care the precision instrument amplifier of low offset drift low gain drift high-gain precision and high cmrr characteristic.
3. Quasi dynamic strain gauge according to claim 1, is characterized in that, described collecting unit comprises 144kSPS and has 8 passage, 24 high resolution converters of sampling functions simultaneously.
4. Quasi dynamic strain gauge according to claim 1, is characterized in that, described Ethernet transmission unit comprises 10Mb/100Mb ethernet controller interface chip.
5. Quasi dynamic strain gauge according to claim 1, is characterized in that, CAN transmission unit comprises high-speed CAN isolation transceiver.
6. Quasi dynamic strain gauge according to claim 1, is characterized in that, described Quasi dynamic strain gauge also comprises: be connected with power supply, and the voltage signal that power supply exports is converted to accurate positive voltage and negative voltage.
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| CN201410291552.2A CN105277168A (en) | 2014-06-26 | 2014-06-26 | Quasi-dynamic strain measurement instrument |
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| CN201410291552.2A CN105277168A (en) | 2014-06-26 | 2014-06-26 | Quasi-dynamic strain measurement instrument |
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| CN105277168A true CN105277168A (en) | 2016-01-27 |
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Citations (7)
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| JPH10281709A (en) * | 1997-04-02 | 1998-10-23 | Saginomiya Seisakusho Inc | Method and device for measuring dynamic strain |
| CN101598528A (en) * | 2009-07-03 | 2009-12-09 | 葛洲坝集团试验检测有限公司 | A kind of dynamic signal acquisition processing device |
| CN101979982A (en) * | 2010-09-14 | 2011-02-23 | 上海海事大学 | Ultra-low frequency displacement vibration and bending complex strain comprehensive test device |
| CN102162773A (en) * | 2010-12-24 | 2011-08-24 | 广州工程总承包集团有限公司 | Clustered-type bridge health real-time monitoring system and method based on wireless communication technology |
| CN202255274U (en) * | 2011-09-22 | 2012-05-30 | 成都拓华科技有限公司 | Portable integrated dynamic strain measurement device |
| CN202372325U (en) * | 2011-11-08 | 2012-08-08 | 山西省交通科学研究院 | Vibration and static and dynamic strain signal wireless data acquisition system for bridge |
| CN102901441A (en) * | 2011-07-29 | 2013-01-30 | 天津城市建设学院 | Crack condition monitoring method for construction engineering structures and monitoring system using crack condition monitoring method |
-
2014
- 2014-06-26 CN CN201410291552.2A patent/CN105277168A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10281709A (en) * | 1997-04-02 | 1998-10-23 | Saginomiya Seisakusho Inc | Method and device for measuring dynamic strain |
| CN101598528A (en) * | 2009-07-03 | 2009-12-09 | 葛洲坝集团试验检测有限公司 | A kind of dynamic signal acquisition processing device |
| CN101979982A (en) * | 2010-09-14 | 2011-02-23 | 上海海事大学 | Ultra-low frequency displacement vibration and bending complex strain comprehensive test device |
| CN102162773A (en) * | 2010-12-24 | 2011-08-24 | 广州工程总承包集团有限公司 | Clustered-type bridge health real-time monitoring system and method based on wireless communication technology |
| CN102901441A (en) * | 2011-07-29 | 2013-01-30 | 天津城市建设学院 | Crack condition monitoring method for construction engineering structures and monitoring system using crack condition monitoring method |
| CN202255274U (en) * | 2011-09-22 | 2012-05-30 | 成都拓华科技有限公司 | Portable integrated dynamic strain measurement device |
| CN202372325U (en) * | 2011-11-08 | 2012-08-08 | 山西省交通科学研究院 | Vibration and static and dynamic strain signal wireless data acquisition system for bridge |
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