CN102928066B - Bridge amplitude detection device and bridge amplitude detection method based on triangular amplitude detection sensor - Google Patents
Bridge amplitude detection device and bridge amplitude detection method based on triangular amplitude detection sensor Download PDFInfo
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- CN102928066B CN102928066B CN201210466285.9A CN201210466285A CN102928066B CN 102928066 B CN102928066 B CN 102928066B CN 201210466285 A CN201210466285 A CN 201210466285A CN 102928066 B CN102928066 B CN 102928066B
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Abstract
The invention provides a bridge amplitude detection device based on a triangular amplitude detection sensor, comprising four parts: the triangular amplitude detection sensor, a gating switch, an impedance analyzer and an upper computer, wherein the upper computer controls the gating switch to sequentially measure impedance values of three triangular coils; the impedance analyzer is used for actually measuring a difference value between the actually-measured impedance values and a specified impedance value through calculation so as to judge the amplitude range of a bridge; the impedance values are introduced into the upper computer through a data line to be analyzed; and when the impedance difference value reaches a pre-set threshold value, i.e., the bridge reaches the requirements of a dangerous bridge, a detecting device can alarm immediately. The invention further provides a bridge amplitude detection method. The device disclosed by the invention has the characteristics of wide detection amplitude range, good linear characteristic, high detection precision, good timelessness and wide application range.
Description
Technical field
The invention belongs to electromagnetic sensing technology field, relate to a kind of bridge amplitude detection device and method based on triangle amplitude acquisition sensor.
Background technology
Bridge amplitude is a very important parameter for bridge structure, and it directly reflects the transverse integral rigidity of bridge structure, is the important evidence of reflection bridge linear change.The load-bearing capacity of bridge amplitude and bridge and the ability resisting the dynamic loads such as earthquake have substantial connection, the accurate detection means of science not only all has great significance for the Timeliness coverage of the detection of load carrying capacity of bridge, bridge shockproof mitigation and unsafe bridge, simultaneously also can for improving theoretical and construction technology experience integration time of Bridge Design.Detection now for bridge amplitude mainly contains photoelectric image method, piezoelectric acceleration sensor method etc.Photoelectric image method is organically integrated light path parsing and image acquisition, and measuring accuracy is high, and measurement parameter kind is many, generally extensively adopts in engineer applied, but its instrument costly, requires higher to user of service.Piezoelectric acceleration sensor method can obtain shift value according to accekeration through twice integration, and this sensor bulk is little, lightweight, survey frequency wide ranges, and can many kinds of parameters in detecting bridge beam vibration process; But because measured acceleration signal average is non-vanishing, after integration, this situation can be exaggerated, particularly after twice integration, displacement amplitude value will produce serious skew, greatly have impact on the order of accuarcy of measurement, and can increase hardware circuit cost.
Summary of the invention
An object of the present invention overcomes the deficiencies in the prior art, provides the bridge amplitude detection device based on triangle amplitude acquisition sensor.This sniffer is based on triangle amplitude acquisition sensor, it utilizes, and two triangular coils are aspectant to be placed on bridge fixing Metallic rod both sides, coil design triangularity is because triangular coils is applicable to large-scale displacement detection, compared to solenoid-shaped coil, triangular coils has good linear characteristic.This triangle amplitude acquisition sensor be the principle design that changes along with metal vibration of bar based on coil impedance.Be characterized in that detected amplitude scope is large, linear characteristic is good, and accuracy of detection is high, and promptness is good, applied range.Its technical scheme adopted is as described below.
A kind of bridge amplitude detection device based on triangle amplitude acquisition sensor, it is characterized in that, comprise triangle amplitude acquisition sensor, gating switch, electric impedance analyzer and host computer four part, PC control gating switch, can the resistance value of sequentially determining two triangular coils, electric impedance analyzer is by the difference calculating actual measurement resistance value and demarcate between resistance value, the size of the amplitude amplitude of bridge can be judged, by data line, resistance value is imported host computer analysis, when impedance differences reaches the threshold value of setting, also when namely bridge reaches the requirement of unsafe bridge, sniffer can be reported to the police.
Wherein, described triangle amplitude acquisition sensor is made up of the triangular coils being evenly distributed on fixing metal bar both sides.
Wherein, the number of turns of described each triangular coils is between 3-200, the diameter of coiling is between 0.1mm-10mm, and two triangular coils ground coiling length of side, the coiling number of turn, coiling density are all identical, and the size of triangular coils can adjust accordingly according to the change of detection amplitude.
Another object of the present invention is to provide a kind of detection method of the bridge amplitude detection device based on triangle amplitude acquisition sensor, and the method adopts following steps:
(1) Metallic rod is fixed in the place to be detected level of bridge, adjustment triangle amplitude acquisition sensor makes Metallic rod be positioned over the centre position of two triangular coils, after sniffer placement is appropriate, by host computer successively gating two detecting coils, measured the resistance value L ' of two coils by electric impedance analyzer
1, L '
2, and be set as calibration value;
(2) adjust Metallic rod, make it successively be positioned over the bottom of upper and lower triangular coils, and measure the resistance value of Metallic rod two coils when coil bottom respectively and be designated as L ", L "
2, and be set to calibration value;
(3) when bridge normally runs, by PC control gating switch, electric impedance analyzer is utilized to measure the resistance value L of two triangular coils successively
1, L
2, it is real-time transmitted to host computer by data line, then the upper amplitude of bridge is
with the product of the high h of triangular coils, lower amplitude is
with the product of the high h of triangular coils, and the size of bridge amplitude is presented in host computer interface, when amplitude exceeds the secure threshold of setting, carries out warning and notify staff in time.
The advantage of the method is in the normal operation not affecting bridge, not by the interference of various weather, tests the running status of bridge quickly and easily, for bridge security navigation provides authentic communication.Relative additive method, this technology is more practical and convenient, simple and quick, is the bridge security of operation pick-up unit having feasibility.
Accompanying drawing explanation
Fig. 1 is the bridge amplitude detection apparatus structure schematic diagram based on triangle amplitude acquisition sensor of the present invention;
Fig. 2 is the triangular coils adjustment schematic diagram of the detection method of the bridge amplitude detection device based on triangle amplitude acquisition sensor of the present invention.
Embodiment
Provide preferred embodiment of the present invention below, these embodiments unrestricted content of the present invention.
embodiment 1
Shown in Figure 1, the embodiment of the present invention provides a kind of bridge amplitude detection device based on triangle amplitude acquisition sensor, comprise triangle amplitude acquisition sensor 6, gating switch 4, electric impedance analyzer 3 and host computer 5 four part, host computer 5 controls gating switch 4, can the resistance value of sequentially determining two triangular coils 1, electric impedance analyzer 3 is by the difference calculating actual measurement resistance value and demarcate between resistance value, the size of the amplitude amplitude of bridge can be judged, by data line, resistance value is imported host computer 5 to analyze, when impedance differences reaches the threshold value of setting, also when namely bridge reaches the requirement of unsafe bridge, sniffer can be reported to the police.
Wherein, described triangle amplitude acquisition sensor 6 is made up of the triangular coils 1 being evenly distributed on fixing metal bar 2 both sides.
Wherein, the number of turns of described each triangular coils 1 is between 3-200, the diameter of coiling is between 0.1mm-10mm, and two triangular coils ground coiling length of side, the coiling number of turn, coiling density are all identical, and the size of triangular coils can adjust accordingly according to the change of detection amplitude.
embodiment 2
Another embodiment of the present invention provides a kind of detection method of the bridge amplitude detection device based on triangle amplitude acquisition sensor, and the method adopts following steps:
(1) Metallic rod 2 is fixed in the place to be detected level of bridge, adjustment triangle amplitude acquisition sensor 6 makes Metallic rod 2 be positioned over the centre position of two triangular coils 1, after sniffer placement is appropriate, by host computer successively gating two detecting coils, measured the resistance value L ' of two coils by electric impedance analyzer
1, L '
2, and be set as calibration value;
(2) as shown in Figure 2, adjust Metallic rod 2 successively, make it successively be positioned over the bottom of upper and lower triangular coils 1, and measure the resistance value of Metallic rod 2 two coils when coil bottom respectively and be designated as L ", L "
2, and be set to calibration value;
(3) when bridge normally runs, control gating switch 4 by host computer 5, utilize electric impedance analyzer 3 to measure the resistance value L of two triangle 1 coils successively
1, L
2, it is real-time transmitted to host computer 5 by data line, then the upper amplitude of bridge is
with the product of the high h of triangular coils, lower amplitude is
with the product of the high h of triangular coils 1, and the size of bridge amplitude is presented on upper 5 machine interfaces, when amplitude exceeds the secure threshold of setting, carries out warning and notify staff in time.
Claims (1)
1., based on a detection method for the bridge amplitude detection device of triangle amplitude acquisition sensor, the method adopts following steps:
(1) Metallic rod is fixed in the place to be detected level of bridge, adjustment triangle amplitude acquisition sensor makes Metallic rod be positioned over the centre position of two triangular coils, after sniffer placement is appropriate, by host computer successively gating two detecting coils, measured the resistance value L of two coils by electric impedance analyzer
1', L
2', and be set as calibration value;
(2) adjust Metallic rod, make it successively be positioned over the bottom of upper and lower triangular coils, and measure the resistance value of Metallic rod two coils when coil bottom respectively and be designated as L
1", L
2", and be set to calibration value;
(3) when bridge normally runs, by PC control gating switch, electric impedance analyzer is utilized to measure the resistance value L of two triangular coils successively
1, L
2, it is real-time transmitted to host computer by data line, then the upper amplitude of bridge is
with the product of the high h of triangular coils, lower amplitude is
with the product of the high h of triangular coils, and the size of bridge amplitude is presented in host computer interface, when amplitude exceeds the secure threshold of setting, carries out warning and notify staff in time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210466285.9A CN102928066B (en) | 2012-11-19 | 2012-11-19 | Bridge amplitude detection device and bridge amplitude detection method based on triangular amplitude detection sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210466285.9A CN102928066B (en) | 2012-11-19 | 2012-11-19 | Bridge amplitude detection device and bridge amplitude detection method based on triangular amplitude detection sensor |
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| CN102928066A CN102928066A (en) | 2013-02-13 |
| CN102928066B true CN102928066B (en) | 2015-01-07 |
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| CN104296861B (en) * | 2014-11-06 | 2017-11-17 | 安徽理工大学 | A kind of vibration of beam frequency identification system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839685A (en) * | 2010-06-11 | 2010-09-22 | 天津大学 | Measurement device and method for wire roundness based on electromagnetic sensor |
| CN102721981A (en) * | 2012-07-06 | 2012-10-10 | 上海海事大学 | Underground pipeline distribution detection device and method based on rectangular hollow core sensor array |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173701A (en) * | 1981-04-21 | 1982-10-26 | Japanese National Railways<Jnr> | Eddy current type device and method for measuring rail displacement |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839685A (en) * | 2010-06-11 | 2010-09-22 | 天津大学 | Measurement device and method for wire roundness based on electromagnetic sensor |
| CN102721981A (en) * | 2012-07-06 | 2012-10-10 | 上海海事大学 | Underground pipeline distribution detection device and method based on rectangular hollow core sensor array |
Non-Patent Citations (1)
| Title |
|---|
| JP昭57-173701A 1982.10.26 * |
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