CN102169013A - Structural displacement monitoring sensor for concrete steel building - Google Patents
Structural displacement monitoring sensor for concrete steel building Download PDFInfo
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- CN102169013A CN102169013A CN 201010607733 CN201010607733A CN102169013A CN 102169013 A CN102169013 A CN 102169013A CN 201010607733 CN201010607733 CN 201010607733 CN 201010607733 A CN201010607733 A CN 201010607733A CN 102169013 A CN102169013 A CN 102169013A
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Abstract
The invention discloses a structural displacement monitoring sensor for a concrete steel building, which consists of a sensing unit, a signal processing unit, a signal transmitting unit and a power supply unit which are distributed on a reinforced concrete structure of the building, wherein sensing unit consists of one or more of copolymer piezoelectric sensors which sense voice and vibration and the variation of the structural stress of between 0.01 and 1,000 kPa; the signal processing unit performs preprocessing on the received sensing signal or data of the sensing unit; the signal transmitting unit transmits the data to a monitoring base station; and the power supply unit is responsible for supplying power to the integral sensor. The monitoring sensor has the characteristics of low cost, easy installation and flexible networking and can realize the long-term healthy real-time monitoring and early warning of any large-area buildings.
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 expansion, high sensitivity, high reliability can be in steel reinforced concrete structure building the displacement structure monitoring sensor of extensive layout.
[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 remains the real-time monitoring that realizes low-cost, the wide buildings sound that covers, vibration and structural deformations such as structural stress variation and distress in concrete.
[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, provide a kind of can continuous monitoring the sensor of displacement structure such as structure foundation uneven subsidence, have low cost, high reliability, can the dense layout monitoring point, sound, vibration, STRESS VARIATION, the displacement structure 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 displacement structure monitoring sensor of reinforced concrete structure, it is characterized in that: comprise at least one acoustical vibration and displacement structure sensing unit, signal processing unit, signal transmission unit and a power supply unit.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.
Specific buildings health monitoring cellular construction, promptly the acoustical vibration sensing unit comprises one or more multipolymer piezoelectric acoustic vibrating sensings unit, and this sensing unit can obtain sound and the vibration of 0.01Hz to 10k Hz, the displacement of auxiliary judgment fabric structure.The displacement structure sensing unit can obtain the structural stress variation of 0.01kPa to 1000kPa, can survey distress in concrete and malformation, the displacement of auxiliary judgment fabric structure for salt.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 surveyed of salt 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 and the distress in concrete of buildings in the real-time monitor large-area zone, thereby comprehensively draw the state of fabric structure displacement, finish fabric structure 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 displacement monitoring sensor of the buildings that is based on reinforced concrete structure that Fig. 1 provides.The displacement structure sensor, as shown in Figure 2, arrange along structure 1 length direction, extend through steering structure 2 after structure 1 and structure 2 intersections and along structure 2 length directions, whole sensor adopts securing member to be fastened on structure 1 and structure 2 surfaces, also can adopt the mode of building to be embedded in structure 1 and structure 2 bodies.Sensor is arranged and is kept certain tension force in the process.The STRESS VARIATION of this sensor between can monitoring of structures, thus judge whether displacement is arranged between the structure.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 displacement structure sensor, and whole sensor is made up of multipolymer displacement transducer and passive cable.Multipolymer displacement sensing body sectional view as shown in Figure 3, the sensor of coaxial configuration is flexible protective layer, packed layer, multipolymer piezoelectric and packed layer from outside to inside successively.The flexible protective layer is made of the good macromolecular material of pliability, so whole sensor has fine pliability, can arrange according to the shape of various structures.
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. a concrete steel building displacement structure monitoring sensor is characterized in that: comprise at least one acoustical vibration and displacement structure sensing unit, signal processing unit, signal transmission unit and a power supply unit.Described each acoustical vibration and displacement structure sensing unit comprise at least one multipolymer piezoelectric acoustic vibration transducer and at least one displacement structure 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 the acoustical vibration of 0.01Hz to 10k Hz.
3. ad hoc structure displacement monitoring cellular construction as claimed in claim 1 is characterized in that: described monitoring means comprises one or more copolymer structure STRESS VARIATION and copolymer structure displacement sensing unit.This sensing unit can obtain structural stress variation and the displacement structure of 0.01kPa to 1000kPa.
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 displacement structure, 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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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010607733 CN102169013A (en) | 2010-12-27 | 2010-12-27 | Structural displacement monitoring sensor for concrete steel building |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010607733 CN102169013A (en) | 2010-12-27 | 2010-12-27 | Structural displacement monitoring sensor for concrete steel building |
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| CN102169013A true CN102169013A (en) | 2011-08-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806203A (en) * | 2016-04-21 | 2016-07-27 | 合肥工业大学 | Three-dimensional relative displacement sensor |
| CN113552220A (en) * | 2021-08-13 | 2021-10-26 | 同济大学 | Reinforced concrete structure health monitoring system |
Citations (3)
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| US20040219351A1 (en) * | 2001-02-02 | 2004-11-04 | Ingo Borchers | Component having vibration-damping properties, mixture for manufacturing the component, and method of manufacturing such a component |
| CN101226680A (en) * | 2008-01-24 | 2008-07-23 | 南通大学 | Device for monitoring soar structure wireless remote health based on GPRS technique |
| CN201277903Y (en) * | 2008-06-18 | 2009-07-22 | 董毓利 | Vibration monitoring apparatus for building structure collapse in fire disaster |
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2010
- 2010-12-27 CN CN 201010607733 patent/CN102169013A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040219351A1 (en) * | 2001-02-02 | 2004-11-04 | Ingo Borchers | Component having vibration-damping properties, mixture for manufacturing the component, and method of manufacturing such a component |
| CN101226680A (en) * | 2008-01-24 | 2008-07-23 | 南通大学 | Device for monitoring soar structure wireless remote health based on GPRS technique |
| CN201277903Y (en) * | 2008-06-18 | 2009-07-22 | 董毓利 | Vibration monitoring apparatus for building structure collapse in fire disaster |
Non-Patent Citations (1)
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| 《电子技术应用》 20081231 王金斗等 "压电传感技术的研究及应用" 89-93 1-4 , 第8期 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806203A (en) * | 2016-04-21 | 2016-07-27 | 合肥工业大学 | Three-dimensional relative displacement sensor |
| CN105806203B (en) * | 2016-04-21 | 2018-08-28 | 合肥工业大学 | A kind of three-dimensional relative displacement transducer |
| CN113552220A (en) * | 2021-08-13 | 2021-10-26 | 同济大学 | Reinforced concrete structure health monitoring system |
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Application publication date: 20110831 |