CN103743334A - Resistance strain gauge - Google Patents
Resistance strain gauge Download PDFInfo
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- CN103743334A CN103743334A CN201310708155.6A CN201310708155A CN103743334A CN 103743334 A CN103743334 A CN 103743334A CN 201310708155 A CN201310708155 A CN 201310708155A CN 103743334 A CN103743334 A CN 103743334A
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Abstract
The invention discloses a resistance strain gauge which includes a signal acquisition module, a serial-port communication module and a host module comprised of an embedded computer. The signal acquisition module and the host module are in bidirectional communication with the serial-port communication module. The host module is also provided with a DC power module and a display module. The signal acquisition module includes a measurement electrical bridge, a low-pass filtering circuit, an amplifying circuit, an analog switching circuit and an A/D conversion circuit. The resistance strain gauge integrates mutually independent modules including the data acquisition module, a man-machine interaction module and the communication module and the like into a whole and has the characteristics of being small in size, diversified in functions, simple to operate, low in cost, high in integration degree and convenient to carry and complies with the development trend of modern measurement instruments.
Description
Technical field
The present invention relates to a kind of electric wire strain gauge.
Background technology
Domestic and international most of electric wire strain gauge product is wired measuring at present, and module is many.It is large that they have volume, cost is high, interference between module greatly, the shortcoming such as Portable belt not, match-on criterion between module is different, make the complicated operation of strain-ga(u)ge measurement system, and the product standard difference that different company produces, make the compatibility between like product poor, these unfavorable factors have limited the promotion and application of strainmeter product, particularly when doing automobile dynamic strain and detect, these measuring equipment modules are many, job stability is poor, collection signal be disturbed larger, the shortcoming embodiment such as to be not easy to carry more obvious.
Summary of the invention
The technical problem to be solved in the present invention is the defect that overcomes prior art, a kind of electric wire strain gauge is provided, it is integrated in one the separate modules such as data acquisition module, human-computer interaction module, communication module, there is volume little, function is many, simple to operate, cost is low, degree of integration is high, portable feature.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
A kind of electric wire strain gauge of the present invention, comprises signal acquisition module, serial communication modular and the host module consisting of embedded computer, described signal acquisition module and described host module respectively with described serial communication modular two-way communication.
Further, described host module is also provided with DC power supplier and display module.
Further, described signal acquisition module comprises measuring bridge, low-pass filter circuit, amplifying circuit, analog switching circuit and A/D change-over circuit; Wherein,
Measuring bridge, can be for voltage or the current signal of analyzing for measurement test specimen strain change in resistance amount is changed into;
Low-pass filter circuit, for by hardware filtering, eliminates the interference of high-frequency harmonic signal;
Amplifying circuit, for the weak voltage signals of level is amplified, to obtain effective sampled signal;
A/D change-over circuit, is the digital signal that computing machine or processor can directly be processed for the signal after amplifying is carried out to sample conversion, improves the processing speed of signal.
Job step of the present invention is: the first step is can be for voltage or the current signal of analyzing by measuring that test specimen strain change in resistance amount changes into by measuring bridge; Second step, low-pass filtering is mainly hardware filtering, eliminates the interference of high-frequency harmonic signal; The 3rd step, by amplifying circuit handle
the weak voltage signals of level amplifies, to obtain effective sampled signal; The 4th step, it is the digital signal that computing machine or processor can directly be processed that A/D change-over circuit carries out sample conversion the signal after amplifying, and improves the processing speed of signal; The 5th step, computing machine part be mainly to sampled signal sample, filtering process and storage, obtain effective measuring-signal; Finally, effective measuring-signal after treatment is carried out numeral demonstration or carries out data storage.
The beneficial effect that the present invention reaches is:
The present invention is integrated in one the separate modules such as data acquisition module, human-computer interaction module, communication module, there is volume little, function is many, simple to operate, cost is low, degree of integration is high, portable feature, meets the development trend of modern measuring instrument.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, for explaining the present invention, is not construed as limiting the invention together with embodiments of the present invention.In the accompanying drawings:
Fig. 1 is the structured flowchart of electric wire strain gauge in embodiment;
Fig. 2 is the structured flowchart of signal acquisition module in embodiment.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
As depicted in figs. 1 and 2, a kind of electric wire strain gauge of the present invention, it is characterized in that, comprise signal acquisition module, serial communication modular and the host module being formed by embedded computer, described signal acquisition module and described host module respectively with described serial communication modular two-way communication.
The measurement of 32 passage strain signals is completed by 8 groups of signal acquisition module, the work such as the measurement of every group of signal acquisition module complete independently 4 road strain signals, filtering, amplification, A/D conversion, transmission, host module has been used for sampling, storage, the filtering work for the treatment of of 32 road strain signals.
Described host module is also provided with DC power supplier and display module.DC power supplier is responsible for whole measuring system stable working power is provided, and display module consists of liquid crystal display and touch-screen, is responsible for real-time demonstration and the setting of measuring system parameter and the function selection of strain measurement signal.
Described signal acquisition module comprises measuring bridge, low-pass filter circuit, amplifying circuit, analog switching circuit and A/D change-over circuit; Wherein,
Measuring bridge, can be for voltage or the current signal of analyzing for measurement test specimen strain change in resistance amount is changed into;
Low-pass filter circuit, for by hardware filtering, eliminates the interference of high-frequency harmonic signal;
Amplifying circuit, for the weak voltage signals of level is amplified, to obtain effective sampled signal;
A/D change-over circuit, is the digital signal that computing machine or processor can directly be processed for the signal after amplifying is carried out to sample conversion, improves the processing speed of signal.
Job step of the present invention is: the first step is can be for voltage or the current signal of analyzing by measuring that test specimen strain change in resistance amount changes into by measuring bridge; Second step, low-pass filtering is mainly hardware filtering, eliminates the interference of high-frequency harmonic signal; The 3rd step, by amplifying circuit handle
the weak voltage signals of level amplifies, to obtain effective sampled signal; The 4th step, it is the digital signal that computing machine or processor can directly be processed that A/D change-over circuit carries out sample conversion the signal after amplifying, and improves the processing speed of signal; The 5th step, computing machine part be mainly to sampled signal sample, filtering process and storage, obtain effective measuring-signal; Finally, effective measuring-signal after treatment is carried out numeral demonstration or carries out data storage.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. an electric wire strain gauge, is characterized in that, comprises signal acquisition module, serial communication modular and the host module consisting of embedded computer, described signal acquisition module and described host module respectively with described serial communication modular two-way communication.
2. a kind of electric wire strain gauge according to claim 1, is characterized in that, described host module is also provided with DC power supplier and display module.
3. a kind of electric wire strain gauge according to claim 1, is characterized in that, described signal acquisition module comprises measuring bridge, low-pass filter circuit, amplifying circuit, analog switching circuit and A/D change-over circuit; Wherein,
Measuring bridge, can be for voltage or the current signal of analyzing for measurement test specimen strain change in resistance amount is changed into;
Low-pass filter circuit, for by hardware filtering, eliminates the interference of high-frequency harmonic signal;
Amplifying circuit, for handle
the weak voltage signals of level amplifies, to obtain effective sampled signal;
A/D change-over circuit, is the digital signal that computing machine or processor can directly be processed for the signal after amplifying is carried out to sample conversion, improves the processing speed of signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310708155.6A CN103743334A (en) | 2013-12-20 | 2013-12-20 | Resistance strain gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310708155.6A CN103743334A (en) | 2013-12-20 | 2013-12-20 | Resistance strain gauge |
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| CN103743334A true CN103743334A (en) | 2014-04-23 |
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| CN201310708155.6A Pending CN103743334A (en) | 2013-12-20 | 2013-12-20 | Resistance strain gauge |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925868A (en) * | 2014-05-05 | 2014-07-16 | 秦皇岛市北戴河兰德科技有限责任公司 | Resistance strain gauge without influence of resistance of long conductor |
| CN104534975A (en) * | 2014-10-17 | 2015-04-22 | 山西省交通科学研究院 | Bridge circuit wiring device of strain collector |
| CN105222700A (en) * | 2015-06-02 | 2016-01-06 | 柳州博实唯汽车科技有限公司 | Based on the digital strainometer of DSP and FPGA |
| CN105258630A (en) * | 2015-11-26 | 2016-01-20 | 上海电气凯士比核电泵阀有限公司 | Equipment for measuring high temperature deformation amount of workpiece and measurement method thereof |
| CN105374196A (en) * | 2014-08-27 | 2016-03-02 | 武汉普创数码科技有限公司 | Data acquisition device and system based on six-component wheel force transducer |
| CN110132466A (en) * | 2018-12-11 | 2019-08-16 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of intelligence sensor and its working method |
| CN110530560A (en) * | 2019-10-09 | 2019-12-03 | 河南科技大学 | A kind of threshing force checking device |
| CN112378371A (en) * | 2020-12-07 | 2021-02-19 | 天津吉达尔重型机械科技股份有限公司 | Pull rod stress strain on-line monitoring device and system |
| CN113686233A (en) * | 2021-09-13 | 2021-11-23 | 武汉智能控制工业技术研究院有限公司 | Automobile structure strain data testing system |
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| CN2279584Y (en) * | 1996-06-05 | 1998-04-22 | 中国科学院武汉岩土力学研究所 | Automatic balancing dynamic strain gauge |
| CN2334012Y (en) * | 1998-07-10 | 1999-08-18 | 华南理工大学 | Multi-functional anti-interference resistance strain gauge |
| JP2000055608A (en) * | 1998-08-07 | 2000-02-25 | Tokyo Sokki Kenkyusho Co Ltd | Strain measuring method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925868A (en) * | 2014-05-05 | 2014-07-16 | 秦皇岛市北戴河兰德科技有限责任公司 | Resistance strain gauge without influence of resistance of long conductor |
| CN103925868B (en) * | 2014-05-05 | 2017-03-22 | 秦皇岛市北戴河兰德科技有限责任公司 | Resistance strain gauge without influence of resistance of long conductor |
| CN105374196A (en) * | 2014-08-27 | 2016-03-02 | 武汉普创数码科技有限公司 | Data acquisition device and system based on six-component wheel force transducer |
| CN104534975A (en) * | 2014-10-17 | 2015-04-22 | 山西省交通科学研究院 | Bridge circuit wiring device of strain collector |
| CN105222700A (en) * | 2015-06-02 | 2016-01-06 | 柳州博实唯汽车科技有限公司 | Based on the digital strainometer of DSP and FPGA |
| CN105258630A (en) * | 2015-11-26 | 2016-01-20 | 上海电气凯士比核电泵阀有限公司 | Equipment for measuring high temperature deformation amount of workpiece and measurement method thereof |
| CN110132466A (en) * | 2018-12-11 | 2019-08-16 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of intelligence sensor and its working method |
| CN110530560A (en) * | 2019-10-09 | 2019-12-03 | 河南科技大学 | A kind of threshing force checking device |
| CN112378371A (en) * | 2020-12-07 | 2021-02-19 | 天津吉达尔重型机械科技股份有限公司 | Pull rod stress strain on-line monitoring device and system |
| CN113686233A (en) * | 2021-09-13 | 2021-11-23 | 武汉智能控制工业技术研究院有限公司 | Automobile structure strain data testing system |
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Application publication date: 20140423 |