CN103076277A - Knocking load applying device for knocking scan type bridge damage detecting - Google Patents
Knocking load applying device for knocking scan type bridge damage detecting Download PDFInfo
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- CN103076277A CN103076277A CN2012105848022A CN201210584802A CN103076277A CN 103076277 A CN103076277 A CN 103076277A CN 2012105848022 A CN2012105848022 A CN 2012105848022A CN 201210584802 A CN201210584802 A CN 201210584802A CN 103076277 A CN103076277 A CN 103076277A
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Abstract
The invention discloses a knocking load applying device for knocking scan type bridge damage detecting, which comprises a traveling car, a knocking device and a knocking control device. The traveling car can move on a to-be-detected bridge; the knocking device is arranged on the traveling car, can generate a knocking load, and can transfer the knocking load to the to-be-detected bridge through the traveling car; and the knocking control device is connected with the knocking device, and is used for controlling the knocking device to generate a preset knocking load. The knocking load applying device for knocking scan type bridge damage detecting provided by the invention can continuously and steadily apply the knocking load with preset frequency and amplitude values to the to-be-detected bridge, so as to meet the requirement of knocking scan type bridge damage detecting.
Description
Technical field
The present invention relates to a kind of system of knocking, particularly relate to a kind of knock the scan-type damage detection for bridges knock the load applying device.
Background technology
Be accompanied by the progress of science and technology and the raising of trip demand, various highway and track traffic rapidly increase with the quantity of bridge, these bridges are in the process of using, constantly be subject to temperature variation, high wind, the erosion of the external environments such as rainfall, be subject to simultaneously carload, the prolonged and repeated effect of vehicular impact, and Partial Bridges also can suffer flood, the damage of the disasteies such as earthquake, increase along with tenure of use, fatigue effect and catabiosis in various degree generally appears in bridge, pontic has been accumulated a large amount of external world's damages, cause a lot of bridges to become unsafe bridge on the definite meaning, a large amount of examples that collapses all appearred in bridge both domestic and external, the serious life security that has threatened people and property safety, so, effectively bridge is carried out damage check in real time very important.
At present, existing bridge structural damage identification technology mainly can be divided into the local detection of off-line and online whole monitoring dual mode: the local detection of off-line refers to when bridge is not worked, adopt nondestructiving detecting means, such as visual inspection, ultrasound wave, electromagnetic eddy, X ray etc., come the damage in the careful detecting structure, this class methods accuracy of detection is higher, but often need to suspend traffic, affect the normal operation of bridge, and need to know in advance the Position Approximate of damage, exist and detect the dead angle, detection efficiency is low; Online whole monitoring then is to preset sensor in bridge structure, the real-time structural response signal that obtains, infer degree of impairment wherein, although this kind method does not need to interrupt the bridge traffic, but accuracy of detection is lower, and has the problem such as noise immunity, permanance of the transmission of installation, magnanimity signal of sensor and storage and sensor.
For above-mentioned technical matters, a kind of technical scheme of knocking the scan-type damage detection for bridges is designed and developed in inventor's plan, can easyly, efficient, high-precision finish bridge and detect, and knocks load by bridge is applied, gather simultaneously the response signal of bridge, detect bridge damnification.Wherein, the load of knocking that applies has significant impact to the accuracy of testing result, is a critical link.
At first, knock the body of a bridge that puts on whole bridge to be measured that load must scan-type, and knock load in the process in whole applying and must keep stable, applying of percussion power must be rationally, accurate response signal could be obtained, and then the damage information of bridge could be determined.In addition, in order to satisfy the demand that detects, other restriction and requirement to be arranged also to knocking load, for example it should have knocking frequency and knocking amplitude of expection, knocking frequency should be controllable, obtaining highly sensitive bridge response signal, and can not cause the resonance of bridge; The dynamics of knocking should be enough large, to inspire desirable bridge response to bridge local damage sensitivity etc.This shows, bridge detects has many requirements and restrictive condition to the load of knocking that applies, and general conventional knocking device can't meet the demands far away, and what need the accurate research and design of a kind of process of exploitation knocks the load applying device, to fill up technological gap.
Summary of the invention
The object of the present invention is to provide a kind of knock the scan-type damage detection for bridges knock the load applying device, the load of knocking of expected frequence and amplitude can be put on bridge to be measured continuously and stably, thereby satisfy the demand of knocking the scan-type damage detection for bridges.
To achieve these goals, the invention provides a kind of knock the scan-type damage detection for bridges knock the load applying device, comprising: travelling car, can be mobile at bridge to be measured; Knocking device is arranged on the described travelling car, and described knocking device can produce and knock load, and will knock load by described travelling car and be passed to bridge to be measured; Knock control device, be connected in described knocking device, be used for controlling described knocking device to produce the predetermined load of knocking.
Preferably, above-mentioned knock the scan-type damage detection for bridges knock the load applying device, wherein, described travelling car is connected with a drive unit, it is mobile at bridge to be measured that described drive unit drives described travelling car.
Preferably, above-mentioned knock the scan-type damage detection for bridges knock the load applying device, wherein, described drive unit is towing vehicle.
Preferably, above-mentioned knock the scan-type damage detection for bridges knock the load applying device, wherein, described travelling car comprises: vehicle body; Wheel is arranged at described vehicle body, and described wheel is rigidity wheel disc and direct contact measured bridge surface.
Preferably, above-mentioned knock the scan-type damage detection for bridges knock the load applying device, wherein, described wheel comprises a front vehicle wheel and two rear wheels, described front vehicle wheel is positioned on vertical vehicle body axis of described travelling car, and two described rear wheels are located at the both sides of described vertical vehicle body axis symmetrically.
Preferably, above-mentioned knock the scan-type damage detection for bridges knock the load applying device, wherein, described knocking device is vibrator, described vibrator is fixed in described vehicle body, the described control device that knocks is the vibrator controller.
Preferably, above-mentioned knock the scan-type damage detection for bridges knock the load applying device, wherein, described vibrator comprises base, the base of described vibrator is seamless to be fixed in described vehicle body.
Preferably, above-mentioned knock the scan-type damage detection for bridges knock the load applying device, wherein, described travelling car is by towing vehicle traction and mobile at bridge to be measured, described vibrator controller is arranged in the described towing vehicle.
The load applying device that knocks that knocks the scan-type damage detection for bridges of the present invention has the following advantages and characteristics at least:
1, the load applying device that knocks that knocks the scan-type damage detection for bridges of the present invention comprises a travelling car, this travelling car can be mobile on bridge to be measured surface, thereby can the continuous body of a bridge that puts on bridge to be measured of load will be knocked, applying of scan-type of realization knocked load, and then can reach the purpose that quickly and easily scanning detects whole bridge.
2, the load of knocking that the load applying device can provide adjustable frequency and adjustable amplitude of knocking of knocking the scan-type damage detection for bridges of the present invention, to obtain highly sensitive ideal response signal, make testing result more accurate, and, knocking frequency can adjust flexibly according to detecting needs, not only can avoid causing the resonance of bridge, also can choose the suitable load frequency interval of knocking according to detecting principle, to get rid of interference noise.
3, the travelling car that knocks the load applying device of scan-type damage detection for bridges that knocks of the present invention is through particular design, has rigid structure, can with knock load stable be passed to bridge to be measured, and the stationarity of travelling car own is good, knock in the process and can not produce vibration interference, further guaranteed the accuracy of testing result.
4, of the present invention knock the scan-type damage detection for bridges to knock the load applying apparatus structure simple, cost is low, simple operation and can adapt to multiple testing environment.
Description of drawings
Fig. 1 is that the present invention knocks load applying apparatus structure schematic diagram;
Fig. 2 is that the present invention knocks another angle structural representation of load applying device;
Fig. 3 is that the present invention knocks the load applying device and is located at and knocks scan-type damage detection for bridges device structure schematic diagram.
The main element label declaration:
1 travelling car
10 drive units
11 vehicle bodies
12 front vehicle wheels
13 rear wheels
21 knocking devices
22 knock control device
L vehicle body axis
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer, below in conjunction with accompanying drawing specific embodiment is described in detail.
Please in conjunction with reference to figure 1, Fig. 2 and Fig. 3, wherein Fig. 1 is that the present invention knocks load applying apparatus structure schematic diagram, Fig. 2 is that the present invention knocks another angle structural representation of load applying device, Fig. 3 is that the present invention knocks the load applying device and is located at and knocks scan-type damage detection for bridges device structure schematic diagram, for realizing that bridge is carried out integral body knocks the scan-type damage check, need a kind of scan-type damage detection for bridges equipment that knocks of design, wherein namely comprise the load applying device that knocks of the present invention, and remaining signal acquiring system and signal processing system, the load applying device that knocks of the present invention is mainly used in the load of knocking of expected frequence and amplitude is put on bridge to be measured continuously and stably, thereby can satisfy whole detection demand of knocking scan-type damage detection for bridges equipment.Bridge to be measured knocks load according to this and produces response signal, carry out signals collecting by signal pickup assembly again, the final response signal that obtains bridge and by signal processing system Treatment Analysis in addition, obtain bridge damnification information, that is to say, it is the basis that whole bridge detects that the present invention knocks the load of knocking that the load applying device produces.
As shown in the figure, the load applying device that knocks of the present invention mainly comprises: travelling car 1, and can be mobile at bridge to be measured; Knocking device 21 is arranged on the travelling car 1, and knocking device 21 can produce and knock load, and will knock load by travelling car and be passed to bridge to be measured; Knock control device 22, be connected in knocking device 21, be used for control knocking device 22 to produce the predetermined load of knocking.
As shown in Fig. 1 and Fig. 2, travelling car 1 carrying knocking device 21, and can drive it in bridge movement to be measured, when travelling car 1 moves, carry and to knock subsystem 2 sustainable applying and knock load, thereby can realize the scanning of knocking to whole bridge to be measured.Travelling car 1 can connect a drive unit 10, and is driven and mobile at bridge to be measured by this drive unit 10, and in the present embodiment, drive unit 10 is a towing vehicle, 1 motion of tethered sliding dolly.In other embodiments, but travelling car 1 also self has power, and can be mobile at bridge.
Travelling car is except the effect with carrying, as mentioned above, it also plays the effect of knocking load of transmitting, so, travelling car itself should be through particular design to reduce or to eliminate buffer action and interference to knocking load fully, make and knock load and can completely effectively be delivered to bridge to be measured, for example in the present embodiment, travelling car 1 includes vehicle body 11 and wheel, wherein vehicle body 11 can be the rigidity vehicle body, and vehicle body 11 materials can be preferably steel, adopts affixed mode to connect between each parts of vehicle body 11, and each parts fits tightly, and disturbs the transmission of knocking load to produce collision between reduction or each parts of elimination vehicle body.Vehicle body 11 itself is designed to rigid suspension, does not knock load thereby can not cushion to weaken.The weight of vehicle body 11 should not kick the beam, and beats in order to avoid produce when knocking.In addition, the weight of vehicle body 11 and structure also should pass through particular design, in the process of design and production, the natural frequency of just having determined travelling car itself according to weight and the structure of vehicle body, apply when knocking load at knocking device 21, should note knocking the frequency of load, avoid travelling car to produce resonance effect.
Wheel also is rigid wheel, be arranged at vehicle body 11 belows or both sides, its selection preferably can be steel, to have good shock resistance and to knock load and transmit performance, felly is without buffer units such as plastic cement tires, that is to say that wheel is rigidity wheel disc (such as the steel wheel disc), load is effectively knocked to bridge transmission to be measured with the most direct in the surface of the direct contact measured bridge of rigidity wheel disc.In the present embodiment, the wheel of travelling car 1 includes front vehicle wheel 12 and rear wheel 13, front vehicle wheel 12 is provided with one, and rear wheel 13 is provided with two, and front vehicle wheel 12 is positioned on vertical vehicle body axis L of travelling car, the both sides of being located at vehicle body axis L of two rear wheel 13 symmetries, front vehicle wheel 12 and two rear wheels 13 form isosceles triangles, thereby make the movement of travelling car 1 more stable, and bear when knocking load when vehicle body 11, dolly still can be stablized and moves ahead, and does not beat or jolts.Certainly, the quantity of travelling car wheel and laying mode can be according to actual measurement environment flexible design, and those skilled in the art can design according to above-mentioned disclosure accommodation other scheme, but all should belong to protection scope of the present invention.
The exciting force of the generation of vibrator namely knocks the vehicle body 11 that load will directly act on travelling car 1, and vehicle body and wheel by travelling car will knock the bridge floor that load is delivered to bridge to be measured.
More than be the structure composition that the present invention knocks the load applying device, illustrate that below in conjunction with accompanying drawing the present invention knocks the simple application of load applying device: drive unit 10 tethered sliding dollies 1 are mobile at bridge to be measured, for the later stage can make things convenient for accurately definite bridge damnification position, drive unit 10 and travelling car 1 should be uniform motion as far as possible.Meanwhile, be arranged at knocking device 21 on the travelling car 1 and under the control of knocking control device 22, vehicle body applied and knock load, knock the frequency of load and amplitude size and all be controlled by and knock control device 22, thereby can produce the desirable load of knocking.Knock load by dolly vehicle body, wheel transmission and finally put on bridge to be measured, the bridge floor that travelling car is passed by all is subject to knocking scanning.
From the above, of the present invention knock the scan-type damage detection for bridges knock the load applying device, can with expected frequence and amplitude knock putting on of load continous-stable bridge to be measured, thereby satisfy the demand when knocking the scan-type damage detection for bridges.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
- One kind knock the scan-type damage detection for bridges knock the load applying device, it is characterized in that, comprising:Travelling car can be mobile at bridge to be measured;Knocking device is arranged on the described travelling car, and described knocking device can produce and knock load, and will knock load by described travelling car and be passed to bridge to be measured;Knock control device, be connected in described knocking device, be used for controlling described knocking device to produce the predetermined load of knocking.
- According to claim 1 knock the scan-type damage detection for bridges knock the load applying device, it is characterized in that, described travelling car is connected with a drive unit, it is mobile at bridge to be measured that described drive unit drives described travelling car.
- According to claim 2 knock the scan-type damage detection for bridges knock the load applying device, it is characterized in that, described drive unit is towing vehicle.
- According to claim 1 knock the scan-type damage detection for bridges knock the load applying device, it is characterized in that, described travelling car comprises:Vehicle body;Wheel is arranged at described vehicle body, and described wheel is rigidity wheel disc and direct contact measured bridge surface.
- According to claim 4 knock the scan-type damage detection for bridges knock the load applying device, it is characterized in that, described wheel comprises a front vehicle wheel and two rear wheels, described front vehicle wheel is positioned on vertical vehicle body axis of described travelling car, and two described rear wheels are located at the both sides of described vertical vehicle body axis symmetrically.
- According to claim 4 knock the scan-type damage detection for bridges knock the load applying device, it is characterized in that, described knocking device is vibrator, described vibrator is fixed in described vehicle body, the described control device that knocks is the vibrator controller.
- According to claim 6 knock the scan-type damage detection for bridges knock the load applying device, it is characterized in that, described vibrator comprises base, the base of described vibrator is seamless to be fixed in described vehicle body.
- According to claim 6 knock the scan-type damage detection for bridges knock the load applying device, it is characterized in that, described travelling car is by towing vehicle traction and mobile at bridge to be measured, described vibrator controller is arranged in the described towing vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105848022A CN103076277A (en) | 2012-12-28 | 2012-12-28 | Knocking load applying device for knocking scan type bridge damage detecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105848022A CN103076277A (en) | 2012-12-28 | 2012-12-28 | Knocking load applying device for knocking scan type bridge damage detecting |
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| CN103076277A true CN103076277A (en) | 2013-05-01 |
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| CN2012105848022A Pending CN103076277A (en) | 2012-12-28 | 2012-12-28 | Knocking load applying device for knocking scan type bridge damage detecting |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411743A (en) * | 2013-07-04 | 2013-11-27 | 东南大学 | Mobile shock vibration test method for bridge by using mobile device |
| CN103969329A (en) * | 2014-04-01 | 2014-08-06 | 清华大学 | Miniature material damage detection device |
| CN104195941A (en) * | 2014-08-19 | 2014-12-10 | 中国路桥工程有限责任公司 | Bridge floor damage detecting vehicle |
| CN104568475A (en) * | 2015-02-02 | 2015-04-29 | 中南大学 | Mobile numerical control model vehicle |
| CN105953996A (en) * | 2016-06-30 | 2016-09-21 | 东南大学 | Bridge detection and evaluation method and equipment based on impact vibration |
| CN104406757B (en) * | 2014-11-17 | 2016-10-05 | 东南大学 | It is applicable to the integrated apparatus that small bridge fast and safely diagnoses |
| CN107300451A (en) * | 2017-01-09 | 2017-10-27 | 温州大学 | A kind of detection method quickly estimated based on damage beam intrinsic frequency |
| CN108918666A (en) * | 2018-04-16 | 2018-11-30 | 清华大学 | A kind of passive percussive material damage detection device and method |
| CN112432751A (en) * | 2020-10-28 | 2021-03-02 | 华南理工大学 | Excitation and wave jet flow transmission detection device for mobile power detection |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411743B (en) * | 2013-07-04 | 2015-09-16 | 东南大学 | Movable equipment is utilized to carry out the method for testing of portable impact shock to bridge |
| CN103411743A (en) * | 2013-07-04 | 2013-11-27 | 东南大学 | Mobile shock vibration test method for bridge by using mobile device |
| CN103969329A (en) * | 2014-04-01 | 2014-08-06 | 清华大学 | Miniature material damage detection device |
| CN104195941A (en) * | 2014-08-19 | 2014-12-10 | 中国路桥工程有限责任公司 | Bridge floor damage detecting vehicle |
| CN104195941B (en) * | 2014-08-19 | 2016-03-30 | 中国路桥工程有限责任公司 | Bridge floor damage check car |
| CN104406757B (en) * | 2014-11-17 | 2016-10-05 | 东南大学 | It is applicable to the integrated apparatus that small bridge fast and safely diagnoses |
| CN104568475A (en) * | 2015-02-02 | 2015-04-29 | 中南大学 | Mobile numerical control model vehicle |
| CN105953996A (en) * | 2016-06-30 | 2016-09-21 | 东南大学 | Bridge detection and evaluation method and equipment based on impact vibration |
| CN107300451A (en) * | 2017-01-09 | 2017-10-27 | 温州大学 | A kind of detection method quickly estimated based on damage beam intrinsic frequency |
| CN107300451B (en) * | 2017-01-09 | 2019-09-13 | 温州大学 | A kind of detection method quickly estimated based on damage beam intrinsic frequency |
| CN108918666A (en) * | 2018-04-16 | 2018-11-30 | 清华大学 | A kind of passive percussive material damage detection device and method |
| CN112432751A (en) * | 2020-10-28 | 2021-03-02 | 华南理工大学 | Excitation and wave jet flow transmission detection device for mobile power detection |
| CN112432751B (en) * | 2020-10-28 | 2022-07-26 | 华南理工大学 | Excitation and wave jet flow transmission detection device for mobile power detection |
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Application publication date: 20130501 |