CN102147284A - Sensor for monitoring sound vibration and structural stress change of reinforced concrete structure building - Google Patents
Sensor for monitoring sound vibration and structural stress change of reinforced concrete structure building Download PDFInfo
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- CN102147284A CN102147284A CN 201010607717 CN201010607717A CN102147284A CN 102147284 A CN102147284 A CN 102147284A CN 201010607717 CN201010607717 CN 201010607717 CN 201010607717 A CN201010607717 A CN 201010607717A CN 102147284 A CN102147284 A CN 102147284A
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Abstract
The invention discloses a sensor for monitoring sound vibration and a structural stress change of a reinforced concrete structure building. The sensor consists of a sensing unit, a signal processing unit, a signal transmitting unit and a power supplying unit distributed in or on the surface of a reinforced concrete structure. The sensing unit consists of one or more copolymer piezo-electric sensors for sensing the sound and the vibration of 0.01 Hz to 10 kHz and a structural stress of 0.01 kPa to 1000 kPa. The signal processing unit preprocesses a received sensing signal or data of the sensing unit. The signal transmitting unit transmits the data to a monitoring base station. A power supply source supplies power to the overall sensor. The sensor disclosed by the invention has the characteristics of low cost, easy installation and flexible networking; and the long-term healthy and real-time monitoring and early warning of any large-area building can be realized.
Description
[technical field]
The present invention relates to fabric structure health monitoring early warning and sensor and circuit design field, be specifically related to a kind of low cost, can be in steel reinforced concrete structure building extensive layout, the sensor of comprehensive buildings acoustical vibration and structural stress and crack monitoring.
[background technology]
Large scale structure health monitoring technology responds and environmental parameter by measurement structure, and contrasts by structure analysis and experiment, in the hope of detection, identification and the assessment of implementation structure damage.Structural damage is caused owing to being subjected to environmental activity (as earthquake, high wind, asymmetry settlement of foundation etc.), artificial destruction or long-term accumulated fatigue.By the analytical structure response data, can grasp the stressed variation or the deformation state of structure, whether most important monitoring exists damage.In case detect damage, will provide corresponding early warning.
The monitoring content of large scale structure health detecting system comprises:
(1) the fixedly mode of structure and corresponding damping thereof;
(2) structure is carried structural response and mechanical state under the effect at normal load and wind;
(3) structure is at accident (such as violent earthquake, typhoon or asymmetry settlement of foundation etc.) degree of impairment afterwards;
(4) the true fatigue conditions of structural elements;
(5) duty of important non-structural element (as the bearing at bridge pier place) and affiliated facility;
(6) the residing environmental baseline of structure is such as wind speed, temperature, ground motion etc.
Wherein the most important thing is the health monitoring after structure meets with accident (such as violent earthquake, typhoon or asymmetry settlement of foundation etc.) and fatigue damage (as distress in concrete or the reinforcing bar deformation etc.) monitoring of structure, and provide corresponding early warning.
The most important target of monitoring structural health conditions and safety assessment development, be that real-time operation state to structure carries out monitoring and evaluation, according to the Monitoring Data analysis result, the design load duty parameter is verified, and the stressed mechanism of the power transmission of structure carried out deep discussion and research, for structural theory research provides long-continued measured test data.The key of dealing with problems is to realize the real-time health monitoring of low cost, the wide buildings that covers.
Configuration state monitoring based on vibration analysis is the main research contents in this field with the health assessment method.This method with modal parameter structure can the reflect structure kinematic behavior power fingerprint or status flag, the health status that the dynamic characteristic by contrast serviceable condition and impaired state comes evaluation structure.The core of dealing with problems remain realize low-cost, the wide buildings sound that covers, vibration and structural stress changes and coagulation on the real-time monitoring of structural deformation such as crack.
[summary of the invention]
Fundamental purpose of the present invention be exactly solve to the buildings health of reinforced concrete structure on a large scale, chronically, problems of monitoring in real time, the sensor in a kind of energy continuous monitoring buildings acoustical vibration and structural stress variation and crack is provided, have low cost, high reliability, can the dense layout monitoring point, sound, vibration, STRESS VARIATION, structural deformation and the distress in concrete of buildings in the real-time monitor large-area zone, thus carry out fabric structure health analysis and early warning.
For achieving the above object, the invention provides a kind of buildings acoustical vibration and structural stress variation monitoring sensor of reinforced concrete structure, it is characterized in that: comprise at least one acoustical vibration and STRESS VARIATION sensing unit, signal processing unit, signal transmission unit and a power supply unit.Each acoustical vibration and STRESS VARIATION sensing unit comprise at least one multipolymer piezoelectric acoustic vibration transducer and at least one STRESS VARIATION sensor.All the sensors in the same sensing unit and a signal processing unit are interconnected, and a signal processing unit links to each other with a signal transmission unit, and each unit all provides energy by power supply unit.
The healthy salt measurement unit of specific buildings structure, i.e. acoustical vibration, STRESS VARIATION and crack sensing unit, it is characterized in that: described monitoring means comprises one or more multipolymer piezoelectric acoustic vibration transducers and structural stress change sensor.Sensing unit can obtain sound, the vibration of 0.01Hz to 10k Hz, can obtain the structural stress variation of 0.01kPa to 1000kPa, can monitor distress in concrete and malformation.The multipolymer piezoelectric sensor of sensing unit, perceives sound vibration and structural stress change, perceptual structure deformation and distress in concrete, the passive cable of perceptual signal process (such as, superpower toughness high density polyethylene (HDPE), low electric capacity-89pF/m, can reach 100m or longer) be connected to signal processing unit, carry out sample quantization afterwards, outwards send by signal transmission unit.
The invention has the beneficial effects as follows: provide a kind of can to the buildings health of reinforced concrete structure on a large scale, chronically, the sensor of monitoring in real time, provide a kind of full structure, on a large scale, continuous buildings monitoring method, have low cost, can the dense layout monitoring point, the abnormal conditions of sound, vibration, STRESS VARIATION, structural deformation and the distress in concrete of buildings in the real-time monitor large-area zone, thus carry out buildings construction health analysis and early warning.
[embodiment and description of drawings]
The application's feature and advantage will be by embodiment, in conjunction with the accompanying drawings.
The embodiment of the acoustical vibration of the buildings that is based on reinforced concrete structure that Fig. 1 provides and the sensor of structural stress variation monitoring.The structural stress change sensor as shown in Figure 2, is built and whole pillar integrally combines in advance along the concrete column length direction.This sensor can be monitored the trickle STRESS VARIATION of cylinder itself, thus the structural health situation of monitoring pillar.The acoustical vibration sensor as Fig. 4, is attached to pillar surface and fixing, and the sound and the vibration that produced by ectocine of pillar can be received by this multipolymer acoustical vibration sensor, thus the structural health situation of monitoring pillar.Above-mentioned two sensors are connected to signal processing unit, signal transmission unit and power supply unit by passive cable.
Fig. 2 is the example of a strain gauge, and whole sensor is made up of multipolymer piezoelectric sensor, plastics protection head, plastics protection tail and passive cable.Multipolymer sensor body sectional view is hard protective seam, packed layer as shown in Figure 3 from outside to inside successively, and center sensor is the multipolymer piezoelectric.The hard protective seam is made of the good metal material of pliability, and as copper, so whole sensor has certain pliability, also keeps excellent toughness.
Fig. 4 is the example of an acoustical vibration sensor, and whole sensor is made up of multipolymer piezoelectric sensor, fixed head and passive cable.The longitudinal sectional drawing of sensor is that fixed head, packed layer, multipolymer piezoelectric, packed layer and hard protective seam are formed as shown in Figure 5 from top to bottom successively.When implementing to install fixed head is fixed on the concrete column surface by mode glued, mechanical fasteners.
Above content be in conjunction with a kind of embodiment to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. the buildings acoustical vibration of a reinforced concrete structure and structural stress variation monitoring sensor is characterized in that: comprise at least one acoustical vibration and STRESS VARIATION sensing unit, signal processing unit, signal transmission unit and a power supply unit.Described each acoustical vibration and stress sensing unit comprise at least one multipolymer piezoelectric acoustic vibration transducer and at least one STRESS VARIATION sensor.All the sensors in the same sensing unit and a signal processing unit are interconnected, and a signal processing unit links to each other with a signal transmission unit, and above-mentioned each unit all provides energy by power supply unit.
2. specific sound vibration monitoring cellular construction as claimed in claim 1 is characterized in that: described monitoring means comprises one or more multipolymer piezoelectric acoustic, vibrating sensing unit, and sensing unit can obtain sound, the vibration of 0.01Hz to 10k Hz.
3. ad hoc structure STRESS VARIATION as claimed in claim 1 and crack sensor monitoring cellular construction is characterized in that: described monitoring means comprises one or more copolymer structure STRESS VARIATION sensing units.This sensing unit can obtain the structural stress variation of 0.01kPa to 1000kPa, can monitor distress in concrete and malformation.
4. as claim 2 and 3 described specific sensing unit structures, it is characterized in that: the multipolymer piezoelectric sensor of described sensing unit, perceives sound, vibration and structural stress change, perceptual structure deformation and distress in concrete, perceptual signal is through passive cable (such as, superpower toughness high density polyethylene (HDPE), low electric capacity-89pF/m, can reach 100m or longer).
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| CN 201010607717 CN102147284A (en) | 2010-12-27 | 2010-12-27 | Sensor for monitoring sound vibration and structural stress change of reinforced concrete structure building |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393449A (en) * | 2011-10-27 | 2012-03-28 | 上海交通大学 | Real-time monitoring method and device used for concrete structure |
| CN103557973A (en) * | 2013-11-20 | 2014-02-05 | 重庆交通大学 | In-service structure prestress in-situ detecting system and method |
| CN104236627A (en) * | 2014-09-05 | 2014-12-24 | 上海应用技术学院 | Health monitoring system for ship collision pier structure |
| CN105223343A (en) * | 2015-10-19 | 2016-01-06 | 北京智博联科技股份有限公司 | A kind of vibration transducer detecting prefabricated concrete structure reinforced bar sleeve grouting plumpness |
| CN106226506A (en) * | 2016-08-18 | 2016-12-14 | 长沙理工大学 | The system of detection prestressed reinforced concrete construction corrosive crack and aggregate manufacture method |
| CN110948502A (en) * | 2019-12-18 | 2020-04-03 | 湖北三江航天红阳机电有限公司 | Robot skin and robot |
| CN113237948A (en) * | 2021-04-16 | 2021-08-10 | 中国三峡建设管理有限公司 | Concrete pouring process monitoring device and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393449A (en) * | 2011-10-27 | 2012-03-28 | 上海交通大学 | Real-time monitoring method and device used for concrete structure |
| CN102393449B (en) * | 2011-10-27 | 2014-01-15 | 上海交通大学 | Real-time monitoring method and device used for concrete structure |
| CN103557973A (en) * | 2013-11-20 | 2014-02-05 | 重庆交通大学 | In-service structure prestress in-situ detecting system and method |
| CN103557973B (en) * | 2013-11-20 | 2015-09-09 | 重庆交通大学 | Existing structure prestress in situ detection system and method |
| CN104236627A (en) * | 2014-09-05 | 2014-12-24 | 上海应用技术学院 | Health monitoring system for ship collision pier structure |
| CN105223343A (en) * | 2015-10-19 | 2016-01-06 | 北京智博联科技股份有限公司 | A kind of vibration transducer detecting prefabricated concrete structure reinforced bar sleeve grouting plumpness |
| CN105223343B (en) * | 2015-10-19 | 2017-06-23 | 北京智博联科技股份有限公司 | A kind of vibrating sensor for detecting prefabricated concrete structure reinforced bar sleeve grouting plumpness |
| CN106226506A (en) * | 2016-08-18 | 2016-12-14 | 长沙理工大学 | The system of detection prestressed reinforced concrete construction corrosive crack and aggregate manufacture method |
| CN110948502A (en) * | 2019-12-18 | 2020-04-03 | 湖北三江航天红阳机电有限公司 | Robot skin and robot |
| CN113237948A (en) * | 2021-04-16 | 2021-08-10 | 中国三峡建设管理有限公司 | Concrete pouring process monitoring device and method |
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Application publication date: 20110810 |