CN114659441A - Method for measuring micro-deformation of building surface - Google Patents
Method for measuring micro-deformation of building surface Download PDFInfo
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- CN114659441A CN114659441A CN202210165186.0A CN202210165186A CN114659441A CN 114659441 A CN114659441 A CN 114659441A CN 202210165186 A CN202210165186 A CN 202210165186A CN 114659441 A CN114659441 A CN 114659441A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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Abstract
The invention relates to a building deformation measurement technology, in particular to a method for measuring micro deformation of a building surface, which comprises the steps of burying piezoelectric sensors at intervals at the same horizontal height of a building, forming a piezoelectric sensing network by a plurality of piezoelectric sensors at the same horizontal height, transmitting signals of the plurality of piezoelectric sensors to a signal processor, and analyzing and processing data by the signal processor to obtain the deformation condition of the building surface; according to the invention, the piezoelectric sensors which are arranged at intervals are arranged at the same horizontal height of the building to form a piezoelectric sensing network, so that the influence of the external load on the building can be monitored in real time, and the deformation condition with the time sequence characteristic is further judged through the real-time measurement data so as to judge whether the external load substantially influences the building or not, and the problem of insufficient accuracy of the measurement of the micro-deformation of the building by single measurement in the prior art is effectively solved.
Description
Technical Field
The invention relates to a building deformation measurement technology, in particular to a method for measuring micro deformation of a building surface.
Background
The deformation of the building refers to a phenomenon that the shape or position of the building is changed under the action of load. According to the regulation of an industry standard 'building deformation measurement Specification' (JGJ 8-2016), the deformation of a building can be divided into two main categories of settlement and displacement, wherein the settlement refers to vertical deformation and comprises settlement and rising; the displacement is a general term for other deformations besides sedimentation, and includes horizontal displacement, inclination, deflection, cracks, convergence deformation, wind vibration deformation, sunlight deformation and the like. The method has important significance for measuring the deformation generated by the load-bearing effect of the building, for example, after the micro deformation of the building is detected and the deformation is increased, the loss of inestimable personnel and property can be avoided by rapidly making an emergency plan, so that an effective and low-cost detection scheme is particularly important.
In the prior art, for example, chinese patent publication No. CN103884291A discloses a building surface flexible deformation monitoring method based on a NURBS parametric curved surface, which is based on a point cloud model obtained by a three-dimensional laser scanning technique, and performs NURBS curved surface modeling on point cloud data, and then performs parameter back-solving on the NURBS parametric curved surface to obtain corresponding points of the building point cloud model before and after deformation, and according to the deformation of the corresponding points before and after deformation, the deformation of each point of the building is calculated quickly and accurately. According to the technical scheme, the deformation of the current building relative to the deformation can be judged quickly in single measurement, but for the small deformation of the surface of the building, three-dimensional laser scanning equipment is erected at different time nodes to obtain the trend conclusion of the deformation of the building, so that the cost is high, and the implementation difficulty is high. As also introduced in the article "research on micro-deformation of buildings based on GB-SAR" by zhou school et al, the working principle and key technology of micro-deformation monitoring system (IBIS-L) based on ground-based synthetic aperture radar interferometry are obtained by analyzing and processing the monitored data of the building, and experiments show that the IBIS system can realize high-resolution, high-precision, real-time monitoring of deformation of the building. However, the technology has high professional requirements and high implementation cost, and has certain difficulty in popularization and application at the present stage.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for measuring micro-deformation of a building surface, which has the advantages of strong real-time performance and low cost and can accurately judge whether the building surface has a deformation trend.
In order to achieve the purpose, the invention adopts the following technical scheme:
the measuring method comprises the steps that piezoelectric sensors are buried at the same horizontal height of a building at intervals, a plurality of piezoelectric sensors located at the same horizontal height form a piezoelectric sensing network, signals of the piezoelectric sensors are transmitted to a signal processor, and the signal processor analyzes and processes data to obtain the deformation condition of the building surface.
In a further technical scheme, multiple groups of piezoelectric sensing networks are arranged at intervals along the height direction of a building.
In a further technical scheme, each piezoelectric sensing network is correspondingly arranged at the middle lower part of each building, preferably at the bottom of each building.
In a further technical scheme, the signal processor specifically analyzes the influence of pressure unbalance of the building at different positions at the same height on current and voltage difference values of the piezoelectric sensors, compares the influence with a preset electric signal warning value, and triggers an alarm device in a corresponding direction to obtain the deformation condition of the building surface if the preset electric signal warning value is exceeded by the value.
In a further technical scheme, the piezoelectric sensor comprises a protection box made of a carbon fiber reinforced composite material, the piezoelectric material is pre-fixed in the protection box, and springs are arranged between the inner wall of the protection box and the piezoelectric material and used for transmitting pressure.
Compared with the prior art, the invention has the following technical effects:
according to the method for measuring the micro-deformation of the building surface, provided by the invention, the piezoelectric sensors which are arranged at intervals are arranged at the same horizontal height of the building to form a piezoelectric sensor network, so that the influence of the external load on the building can be monitored in real time, and the deformation condition with the time sequence characteristic is further judged according to the real-time measurement data, so that whether the external load substantially influences the building or not is judged, and the problem that the accuracy of the measurement of the micro-deformation of the building is insufficient in the prior art by single measurement is effectively solved.
Furthermore, the micro-deformation condition of the building surface is judged according to the time sequence characteristics based on the measurement scheme provided by the invention, so that the deformation tendency of the building surface is timely and accurately judged, time is saved for the formulation of an emergency plan, and the damage to personnel and property loss is avoided;
in addition, according to the scheme provided by the invention, the grasping of the deformation conditions of the building surface in different directions can be further improved through the arrangement of the piezoelectric sensing network, and the judgment precision of the micro-deformation conditions of the building surface is improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified with the specific embodiments.
As mentioned above, the invention provides a method for measuring micro-deformation of a building surface, which comprises the steps of burying piezoelectric sensors at intervals at the same level of a building, forming a piezoelectric sensing network by a plurality of piezoelectric sensors at the same level, transmitting signals of the piezoelectric sensors to a signal processor, and analyzing and processing data by the signal processor to obtain the deformation condition of the building surface.
In the measuring method provided by the invention, a plurality of piezoelectric sensors which are arranged at intervals are arranged at the same horizontal height of a building to form a piezoelectric sensing network, so that the influence of the external load on the building can be monitored in real time, and the deformation condition with the time sequence characteristic is further judged according to the real-time measurement data so as to judge whether the external load substantially influences the building or not, and the problem of insufficient accuracy of single measurement on the measurement of the micro-deformation of the building in the prior art is effectively solved.
Furthermore, the micro-deformation condition of the building surface is judged according to the time sequence characteristics based on the measurement scheme provided by the invention, so that the deformation tendency of the building surface is timely and accurately judged, time is saved for the formulation of an emergency plan, and the damage to personnel and property loss is avoided;
in addition, according to the scheme provided by the invention, the grasping of the deformation conditions of the building surface in different directions can be further improved through the arrangement of the piezoelectric sensing network, and the judgment precision of the micro-deformation conditions of the building surface is improved.
According to the measuring method provided by the invention, no special requirement is made on the distance between the piezoelectric sensors embedded at the same horizontal height, the deformation condition of the building can be effectively monitored, the smaller the distance between the adjacent piezoelectric sensors is, the higher-precision measurement of the pressure change condition of the building surface can be inevitably carried out, and the higher-precision feedback of the deformation condition of the building surface can be further carried out, but the implementation cost of the scheme is increased, and the monitoring precision of the deformation condition of the building surface is correspondingly reduced along with the increase of the distance between the adjacent piezoelectric sensors. In one embodiment of the present invention, the burying spacing of adjacent piezoelectric sensors is 1m to 3 m.
According to the measuring method provided by the invention, in order to improve the grasp of the deformation conditions of different height positions of the building, a plurality of groups of piezoelectric sensing networks are arranged at intervals along the height direction of the building, and further, the deformation conditions of the building surface in the same direction can be further verified by arranging the piezoelectric sensing networks at different heights, so that the judgment precision of the deformation conditions is improved.
Further, in the measuring method provided by the invention, each piezoelectric sensing network is correspondingly arranged at the middle lower part of each building. By arranging the piezoelectric sensors at the middle lower part of each building, the pressure change of the building under load can be effectively measured, and particularly preferably, each piezoelectric sensing network is correspondingly arranged at the bottom of each building. Thus, the construction is convenient, and the same level is confirmed.
According to the measuring method provided by the invention, the signal processor specifically analyzes the influence of pressure unbalance of the building at different positions at the same height on the current and voltage difference values of the piezoelectric sensors, carries out numerical comparison with a preset electric signal warning value, and triggers an alarm device in a corresponding direction to obtain the deformation condition of the building surface if the numerical comparison exceeds the preset warning value.
In the invention, the piezoelectric sensor is used for acting the surface deformation signal of the building on the piezoelectric sensor in a pressure mode, so that the change of an electric signal is generated, namely, the measurement of a mechanical quantity is converted into the measurement of an electric quantity, and the pressure unbalance phenomenon of the building is fed back. In a specific embodiment of the present invention, the piezoelectric sensor includes a protection box made of a carbon fiber reinforced composite material, the piezoelectric material is pre-fixed in the protection box, and springs are disposed between the inner wall of the protection box and the piezoelectric material for transmitting pressure. The piezoelectric material is protected by the protection box made of the carbon fiber reinforced composite material, and the piezoelectric material is prevented from being embedded into a building wall body and being physically damaged.
According to the measurement method provided by the invention, the piezoelectric material with a positive piezoelectric effect, which is well known to those skilled in the art, can be selected, for example, the piezoelectric material can be specifically selected to be polyvinylidene fluoride.
The method for measuring the deformation of the building surface has the advantages that the deformation of the building surface is monitored, the real-time performance is high, the deformation phenomenon with the tendency is effectively fed back, and the safety of the building is well guaranteed.
The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The method for measuring the micro-deformation of the building surface is characterized by comprising the steps of burying piezoelectric sensors at intervals at the same horizontal height of a building, forming a piezoelectric sensing network by a plurality of piezoelectric sensors at the same horizontal height, transmitting signals of the piezoelectric sensors to a signal processor, and analyzing and processing data by the signal processor to obtain the deformation condition of the building surface.
2. The measurement method according to claim 1, wherein the piezoelectric sensor networks are arranged in a plurality of groups at intervals in a height direction of a building.
3. A measuring method according to claim 2, wherein each piezoelectric sensor network is arranged in the middle and lower part of each building, preferably in the bottom of each building.
4. The method according to claim 1, wherein the signal processor analyzes the effect of pressure imbalance of the building at different positions at the same height on the current-voltage difference of the piezoelectric sensors, compares the current-voltage difference with a preset electric signal alarm value, and triggers an alarm device in a corresponding direction to obtain the deformation of the building surface if the current-voltage difference exceeds the preset alarm value.
5. The measuring method according to claim 1, wherein the piezoelectric sensor comprises a protective case made of carbon fiber reinforced composite material, the piezoelectric material is pre-fixed in the protective case, and springs are arranged between the inner wall of the protective case and the piezoelectric material for transmitting pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210165186.0A CN114659441A (en) | 2022-02-17 | 2022-02-17 | Method for measuring micro-deformation of building surface |
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| CN202210165186.0A CN114659441A (en) | 2022-02-17 | 2022-02-17 | Method for measuring micro-deformation of building surface |
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| CN114659441A true CN114659441A (en) | 2022-06-24 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147231A (en) * | 2010-12-27 | 2011-08-10 | 深圳思量微系统有限公司 | Structural displacement monitoring sensor for building with steel structure |
| CN102169014A (en) * | 2010-12-27 | 2011-08-31 | 深圳思量微系统有限公司 | Monitoring sensor for voice vibration and variation of structural stress in steel structure building |
| CN105091951A (en) * | 2015-09-25 | 2015-11-25 | 江苏省泰州引江河管理处 | Deformation monitoring and state early-warning method for hydraulic structure of sluice station |
| CN105606070A (en) * | 2016-03-07 | 2016-05-25 | 三峡大学 | Device and method for testing vertical and horizontal deformation of building |
| CN106032982A (en) * | 2015-03-16 | 2016-10-19 | 中铁西北科学研究院有限公司深圳南方分院 | Automated monitoring pre-warning method and automated monitoring pre-warning system for building inclining deformation |
| CN109141514A (en) * | 2017-08-11 | 2019-01-04 | 上海华测导航技术股份有限公司 | A kind of building safety detection method |
| CN113252776A (en) * | 2021-03-29 | 2021-08-13 | 东莞理工学院 | Building contact interface monitoring method |
-
2022
- 2022-02-17 CN CN202210165186.0A patent/CN114659441A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147231A (en) * | 2010-12-27 | 2011-08-10 | 深圳思量微系统有限公司 | Structural displacement monitoring sensor for building with steel structure |
| CN102169014A (en) * | 2010-12-27 | 2011-08-31 | 深圳思量微系统有限公司 | Monitoring sensor for voice vibration and variation of structural stress in steel structure building |
| CN106032982A (en) * | 2015-03-16 | 2016-10-19 | 中铁西北科学研究院有限公司深圳南方分院 | Automated monitoring pre-warning method and automated monitoring pre-warning system for building inclining deformation |
| CN105091951A (en) * | 2015-09-25 | 2015-11-25 | 江苏省泰州引江河管理处 | Deformation monitoring and state early-warning method for hydraulic structure of sluice station |
| CN105606070A (en) * | 2016-03-07 | 2016-05-25 | 三峡大学 | Device and method for testing vertical and horizontal deformation of building |
| CN109141514A (en) * | 2017-08-11 | 2019-01-04 | 上海华测导航技术股份有限公司 | A kind of building safety detection method |
| CN113252776A (en) * | 2021-03-29 | 2021-08-13 | 东莞理工学院 | Building contact interface monitoring method |
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