CN104155044A - Measuring device and measuring method for cable force of cable-stayed bridge based on mobile terminal - Google Patents
Measuring device and measuring method for cable force of cable-stayed bridge based on mobile terminal Download PDFInfo
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- CN104155044A CN104155044A CN201410334835.0A CN201410334835A CN104155044A CN 104155044 A CN104155044 A CN 104155044A CN 201410334835 A CN201410334835 A CN 201410334835A CN 104155044 A CN104155044 A CN 104155044A
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Abstract
The invention discloses a measuring device and method for cable force of a cable-stayed bridge based on a mobile terminal. An acceleration sensor is integrated on a mobile terminal; the measuring device comprises a parameter setting module, an acceleration measuring module, a vibration data processing module and a display module. The invention further discloses a measuring method. The method comprises the following steps: starting a measuring procedure on the mobile terminal, and setting physical parameters of a cable; fixing the back side of the mobile terminal on the cable; invoking an API provided by the intelligent mobile terminal to visit bottom hardware; reading a cable vibration signal of the cable-stayed bridge collected by the acceleration sensor; conducting FFT converting on the cable vibration signal of the cable-stayed bridge to obtain cable self-vibration frequency; calculating cable force according to physical relation of the cable force and the self-vibration frequency; displaying cable vibration wave form, spectrum and measuring result. The device and the method have the advantages that the measuring process is simple, the cost is low, the size is small, the carrying is convenient, and no hardware is added.
Description
Technical field
The present invention relates to vibration survey research field, particularly a kind of cord force of cable-stayed bridge measurement mechanism and method based on mobile terminal.
Background technology
Vibration frequency method is to apply Character of Cable Force of Cable stayed Bridge measuring method of tensile force very widely, concrete principle is to utilize acceleration transducer to pick up the vibration signal of a segment stayed-cable bridge cable under natural excitation effect, then vibration signal is carried out to FFT conversion (Fast Fourier Transform (FFT)), obtain the information such as the cable natural frequency of vibration, calculate Suo Li by the physical relation between cable tension (being called for short Suo Li) and the natural frequency of vibration.
Picking up of cable vibration signal is the key link of application vibration frequency method.Traditional Suo Li dynamic tester is generally made up of acceleration transducer, signal amplifier, data collecting instrument and computing machine, need with very long wire connecting sensor and collecting device, equipment volume is huger, and be inconvenient to move, although portable Suo Li dynamic tester integrates signal amplification, data acquisition and data processing function, volume is little a lot, and price is higher, function is more single, is inconvenient to upgrade.
In recent years, intelligent mobile terminal equipment (smart mobile phone, panel computer etc.) manufacturing technology is advanced by leaps and bounds, integrated increasing sensor, is almost all indispensable acceleration transducers of every intelligent mobile terminal, can be in screen automatic rotation and the game based on gravity.Along with the develop rapidly of hardware manufacturing technology, from strength to strength, precision is more and more higher for the integrated acceleration transducer performance of intelligent terminal, has even reached the requirement of engineering application.Intelligent terminal domestic os provides good support to built-in sensors simultaneously, application developer can by intelligent terminal operating system for the various application programming interface access bottom hardwares that sensor provides, for example, arrange sensor sample frequency, precision, range, reading out data etc.Therefore on intelligent terminal platform, develop sensor-based application very convenient.
Summary of the invention
Fundamental purpose of the present invention is that the shortcoming that overcomes prior art, with not enough, provides a kind of cord force of cable-stayed bridge measurement mechanism based on mobile terminal, and this device is to realize based on mobile terminal, has advantages of that cost is low, does not take up room, conveniently moves.
Another object of the present invention is to provide a kind of method based on above-mentioned cord force of cable-stayed bridge measurement mechanism, the method is to utilize existing mobile terminal to realize the measurement to cord force of cable-stayed bridge, solve that existing measuring equipment volume is large, installation work amount is large, the difficult problem that testing cost is higher.
Object of the present invention realizes by following technical scheme: a kind of cord force of cable-stayed bridge measurement mechanism based on mobile terminal, on mobile terminal, be integrated with acceleration transducer, described measurement mechanism comprises that parameter arranges module, acceleration analysis module and vibration data processing module, wherein: parameter arranges module for the physical parameter of cable is set; Acceleration analysis module is for calling the API that intelligent mobile terminal operating system provides, and access bottom hardware, reads the Character of Cable Force of Cable stayed Bridge vibration signal that acceleration transducer gathers; Vibration data processing module, for Character of Cable Force of Cable stayed Bridge vibration signal is carried out to FFT conversion, obtains the cable natural frequency of vibration, calculates Suo Li according to the physical relation of Suo Li and the natural frequency of vibration.
Preferably, described measurement mechanism also comprises a display module, and this module is for demonstration screen display cable vibration waveform, frequency spectrum and measurement result at mobile terminal.
Preferably, described acceleration transducer sample frequency is 20Hz, 60Hz or 100Hz.
Concrete, the physical parameter that described parameter arranges the cable of module setting comprises: the line density of cable, elastic modulus, diameter, length.
Parameter recited above arranges module, acceleration analysis module, vibration data processing module and display module and is the software program based on intelligent mobile terminal platform development.
Based on a method for above-mentioned cord force of cable-stayed bridge measurement mechanism, comprise step:
(1) start detection program on mobile terminal, arranges the physical parameter of cable;
(2) the mobile terminal back side is fixed on cable;
(3) call the API that intelligent mobile terminal operating system provides, access bottom hardware, reads the Character of Cable Force of Cable stayed Bridge vibration signal that acceleration transducer gathers;
(4) Character of Cable Force of Cable stayed Bridge vibration signal is carried out to FFT conversion, obtain the cable natural frequency of vibration, calculate Suo Li according to the physical relation of Suo Li and the natural frequency of vibration.
Preferably, after described step (4), also comprise step: (5) show cable vibration waveform, frequency spectrum and measurement result.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
1, the present invention utilize existing intelligent mobile terminal integrated the advantage of the hardware such as processor, display screen, acceleration transducer, the integrated function such as data acquisition and data processing, and mobile terminal especially mobile phone be almost that everyone must belongings, it is easier therefore to obtain.
2, the present invention is with low cost, and only a software need be installed on mobile terminal gets final product work, needn't increase any hardware, if desired measures several cables pulling force simultaneously, and on multi-section mobile terminal, installation is applied and need not be increased any cost.
3, testing process of the present invention is simple.Mobile terminal and cable are just fixed and can be detected by double sticky tape or other modes, and testing result instant playback, on mobile terminal screen, has been avoided tediously long wire simultaneously.
4, diverse in function of the present invention.Intelligent mobile terminal application has very perfect development environment, can develop according to demand various functions, has overcome the feature of traditional Suo Li checkout equipment function singleness.
Brief description of the drawings
Fig. 1 is the structural representation of apparatus of the present invention.
Fig. 2 is work schematic diagram of the present invention.
Shown in figure, be: 1-mobile terminal; 2-double sticky tape; 3-cable.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1
On current mobile terminal, be all integrated with the hardware such as processor, display screen, acceleration transducer, and along with the develop rapidly of electronic manufacturing technology, from strength to strength, precision is more and more higher for these hardware performances, has even reached the requirement of engineering application.Based on above-mentioned mobile terminal, the present embodiment proposes a kind of cord force of cable-stayed bridge measurement mechanism based on mobile terminal as shown in Figure 1, comprise that parameter arranges module, acceleration analysis module, vibration data processing module and display module, above-mentioned module is the software program based on intelligent mobile terminal platform development, processed by CPU, result shows on mobile terminal display screen.
Parameter arranges module for the physical parameters such as the line density, elastic modulus, diameter, length of cable are set; Acceleration analysis module is for calling the API that intelligent mobile terminal operating system provides, and access bottom hardware, reads the Character of Cable Force of Cable stayed Bridge vibration signal that acceleration transducer gathers; Vibration data processing module, for Character of Cable Force of Cable stayed Bridge vibration signal is carried out to FFT conversion, obtains the cable natural frequency of vibration, calculates Suo Li according to the physical relation of Suo Li and the natural frequency of vibration.; Display module is for showing cable vibration waveform, frequency spectrum and measurement result.Intelligent mobile terminal acceleration transducer sample frequency is 20Hz, 60Hz or 100Hz.
The measuring method of above-mentioned measurement mechanism is as follows:
(1) start detection program, is arranged module and is arranged the physical parameter of cable by parameter.
(2) mobile terminal display screen upwards, is fixed mobile terminal and cable with double sticky tape.As shown in Figure 2.
(3) gather Character of Cable Force of Cable stayed Bridge vibration signal by acceleration analysis module.
(4) vibration data processing module is carried out FFT conversion to Character of Cable Force of Cable stayed Bridge vibration signal, obtains the cable natural frequency of vibration, calculates Suo Li according to the physical relation of Suo Li and the natural frequency of vibration.
(5) showing screen display cable vibration waveform, frequency spectrum and measurement result by display module.
The physical relation of vibration frequency method, FFT conversion, acceleration analysis, waveform, frequency spectrum demonstration, Suo Li and the natural frequency of vibration described in the present embodiment etc. all adopts known solution of the prior art, relevant above-mentioned known solution, those skilled in the art all understands, and does not repeat them here.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (6)
1. the cord force of cable-stayed bridge measurement mechanism based on mobile terminal, is integrated with acceleration transducer on mobile terminal, it is characterized in that, described measurement mechanism comprises that parameter arranges module, acceleration analysis module and vibration data processing module, wherein:
Parameter arranges module for the physical parameter of cable is set;
Acceleration analysis module is for calling the API that intelligent mobile terminal operating system provides, and access bottom hardware, reads the Character of Cable Force of Cable stayed Bridge vibration signal that acceleration transducer gathers;
Vibration data processing module, for Character of Cable Force of Cable stayed Bridge vibration signal is carried out to FFT conversion, obtains the cable natural frequency of vibration, calculates Suo Li according to the physical relation of Suo Li and the natural frequency of vibration.
2. the cord force of cable-stayed bridge measurement mechanism based on mobile terminal according to claim 1, is characterized in that, described measurement mechanism also comprises a display module, and this module is for demonstration screen display cable vibration waveform, frequency spectrum and measurement result at mobile terminal.
3. the cord force of cable-stayed bridge measurement mechanism based on mobile terminal according to claim 1, is characterized in that, described acceleration transducer sample frequency is 20Hz, 60Hz or 100Hz.
4. the cord force of cable-stayed bridge measurement mechanism based on mobile terminal according to claim 1, is characterized in that, the physical parameter that described parameter arranges the cable of module setting comprises: the line density of cable, elastic modulus, diameter, length.
5. the method based on cord force of cable-stayed bridge measurement mechanism claimed in claim 1, is characterized in that, comprises step:
(1) start detection program on mobile terminal, arranges the physical parameter of cable;
(2) the mobile terminal back side is fixed on cable;
(3) call the API that intelligent mobile terminal operating system provides, access bottom hardware, reads the Character of Cable Force of Cable stayed Bridge vibration signal that acceleration transducer gathers;
(4) Character of Cable Force of Cable stayed Bridge vibration signal is carried out to FFT conversion, obtain the cable natural frequency of vibration, calculate Suo Li according to the physical relation of Suo Li and the natural frequency of vibration.
6. the method for the cord force of cable-stayed bridge measurement mechanism based on mobile terminal according to claim 5, is characterized in that, after described step (4), also comprises step:
(5) show cable vibration waveform, frequency spectrum and measurement result.
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| CN201410334835.0A CN104155044A (en) | 2014-07-14 | 2014-07-14 | Measuring device and measuring method for cable force of cable-stayed bridge based on mobile terminal |
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| CN106840499A (en) * | 2017-01-10 | 2017-06-13 | 赵墨林 | Pole wire Tensile Test Method, device and system |
| CN110196279A (en) * | 2019-05-30 | 2019-09-03 | 杭州友邦演艺设备有限公司 | A kind of arenas steel wire safety detection method |
| CN110220630A (en) * | 2019-07-05 | 2019-09-10 | 大连大学 | A kind of portable bridge cable force detecting device |
| CN110730516A (en) * | 2018-07-17 | 2020-01-24 | 天津工业大学 | Portable dynamic elasticity modulus tester controlled by mobile terminal |
| CN111242058A (en) * | 2020-01-16 | 2020-06-05 | 江苏东印智慧工程技术研究院有限公司 | Android and HHT-based time-varying cable force identification method |
| CN111912557A (en) * | 2020-08-31 | 2020-11-10 | 五邑大学 | Cable-stayed bridge cable force real-time monitoring device |
| CN113295317A (en) * | 2021-05-20 | 2021-08-24 | 吉林大学 | Bridge construction cable force testing method and device based on bionic principle |
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| CN110196279A (en) * | 2019-05-30 | 2019-09-03 | 杭州友邦演艺设备有限公司 | A kind of arenas steel wire safety detection method |
| CN110220630A (en) * | 2019-07-05 | 2019-09-10 | 大连大学 | A kind of portable bridge cable force detecting device |
| CN111242058A (en) * | 2020-01-16 | 2020-06-05 | 江苏东印智慧工程技术研究院有限公司 | Android and HHT-based time-varying cable force identification method |
| CN111912557A (en) * | 2020-08-31 | 2020-11-10 | 五邑大学 | Cable-stayed bridge cable force real-time monitoring device |
| CN113295317A (en) * | 2021-05-20 | 2021-08-24 | 吉林大学 | Bridge construction cable force testing method and device based on bionic principle |
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Application publication date: 20141119 |