CN105300586A - Monitoring system and method of wind and rain load of structure surface - Google Patents
Monitoring system and method of wind and rain load of structure surface Download PDFInfo
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- CN105300586A CN105300586A CN201510665011.6A CN201510665011A CN105300586A CN 105300586 A CN105300586 A CN 105300586A CN 201510665011 A CN201510665011 A CN 201510665011A CN 105300586 A CN105300586 A CN 105300586A
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Abstract
The invention discloses a monitoring system and method of the wind and rain load of a structure surface. According to the monitoring system and method, a plurality of piezoelectric ceramic sensors are arranged to form an array, and the array is encapsulated in an encapsulation material through an alignment and stress-free encapsulation method, so that a sensor encapsulation body can be formed, and therefore, the problems of brittleness in the quality of piezoelectric ceramic sheets and poor waterproof performance of the piezoelectric ceramic sensors can be solved; the piezoelectric ceramic sensors are advantageous in low cost; the sensor encapsulation body can be bonded at a tested structure surface through using epoxy resin, and the piezoelectric ceramic sensors can be utilized to monitor the wind and rain load of the structure surface in real time; and charge pulse signals generated by the piezoelectric ceramic sensors due to the action of the wind and rain load can be acquired through a signal acquisition system, and the charge pulse signals can be analyzed and processed, so that a stress field on the surface of the sensor encapsulation body can be obtained, and therefore, tiny wind and rain load of the structure surface can be monitored in real time. Compared with other monitoring methods, the monitoring method of the invention has the advantages of reliability, stability, low cost, high sensitivity, easiness in implementation and suitability for large-scale and wide use.
Description
Technical field
The present invention relates to the monitoring technical field of body structure surface dynamic load, specifically relate to a kind of monitoring system and method for body structure surface wind and rain load.
Background technology
Code for structural design based on the linear behavior of structure under dynamic load is along with the further increasing of modern building fabric height, span, profile area, the further genralrlization of new material, new system, wind, rain load and coupling effect thereof are more and more subject to the attention of architects, and wind load is considered in design load by existing high-rise specification.But owing to lacking measured data, in design or experiment, reference value is lacked for the wind of nonlinearity, rain load.So for wind, this faint load of rain load, the load transducer developing small range is very necessary.
The sensitive element of the sensor of the faint loads such as existing measurement wind and rain is as MEMS element, and price is high, is not easy to widespread use.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention proposes a kind of system and method utilizing piezoceramic-polymer monitoring of structures surface wind and rain load, effectively can solve the problem of small wind and rain load measurement cost, measuring accuracy, is suitable for large-scale popularization and uses.
Technical scheme of the present invention is achieved in that
A monitoring system for body structure surface wind and rain load, comprises signal acquiring system and sensor encapsulation, and described sensor encapsulation is pasted on tested structural outer surface; Described sensor encapsulation comprises encapsulating material and is located at several piezoceramic transducers being arranged into array in described encapsulating material by the accurate Non-stress packaging method that flushes, and described piezoceramic transducer is connected with described signal acquiring system; Described piezoceramic transducer can produce the charge pulse signal of corresponding wind and rain load action power on it, and is transferred to described signal acquiring system; Described signal acquiring system can according to the charge pulse signal of each piezoceramic transducer received, and analyzing and processing obtains acting on the stress field on sensor encapsulation surface.
As a further improvement on the present invention, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece; Described encapsulating material is waterproof, corrosion resistant flexible material, and several piezoelectric ceramic pieces being arranged into array flush Non-stress packaging method by standard and are encapsulated in this flexible material.
As a further improvement on the present invention, described piezoelectric ceramic piece is square, and area is 25mm
2; Thickness is 10mm, and the spacing between adjacent two piezoelectric ceramic pieces is 5mm.
A monitoring method for body structure surface wind and rain load, comprises the steps:
A. sensor package,
Several piezoceramic transducers are arranged into array, and use encapsulating material to carry out standard to flush Non-stress packaging, form sensor encapsulation;
B. sensor is arranged,
Used by sensor encapsulation epoxy resin to be pasted onto tested body structure surface, carry out wind and rain load Real-Time Monitoring;
C. signals collecting,
Each piezoceramic transducer is connected with a signal acquiring system, by signal acquiring system, the charge pulse signal that piezoelectric ceramic piece each in sensor encapsulation produces is gathered;
D. load calculates,
According to direct piezo electric effect, the charge pulse signal produced by the piezoceramic transducer collected and the piezoelectric constant of piezoceramic transducer self calculate the load suffered by each piezoceramic transducer, according to said method, the stress field of whole sensor package surface is finally obtained.
As a further improvement on the present invention, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece; Described encapsulating material is waterproof, corrosion resistant flexible material, and several piezoelectric ceramic pieces being arranged into array flush Non-stress packaging method by standard and are encapsulated in this encapsulating material.
As a further improvement on the present invention, described piezoelectric ceramic piece is square, and area is 25mm
2; Thickness is 10mm, and the spacing between adjacent two piezoelectric ceramic pieces is 5mm.
The invention has the beneficial effects as follows: the monitoring system that the invention provides a kind of body structure surface wind and rain load, flush Non-stress packaging method by standard and be encapsulated in encapsulating material by several piezoceramic transducers being arranged into array and form sensor encapsulation, the piezoelectric ceramic piece matter that can solve piezoceramic transducer is crisp, the problem of water proofing property difference, and in piezoceramic transducer hinge structure, MEMS element has lower-cost significant advantage.By being used by sensor encapsulation epoxy resin to be pasted onto tested body structure surface, the wind and rain load of piezoceramic transducer to body structure surface can be utilized to carry out Real-Time Monitoring; Each piezoceramic transducer is connected by signal acquiring system, the charge pulse signal due to the generation of wind and rain load action power on piezoceramic transducer can be gathered, then, according to the charge pulse signal of each piezoceramic transducer received, analyzing and processing obtains acting on the stress field on sensor encapsulation surface, namely can carry out Real-Time Monitoring by the wind and rain load small to body structure surface.
The invention provides a kind of monitoring method of body structure surface wind and rain load, first, several piezoelectric ceramic pieces are arranged in array format, form piezoceramic transducer array, then its outer use there is water proofing property, corrosion resistant flexible material carries out standard and flushes Non-stress packaging method, forms sensor encapsulation.When needing the wind and rain load measuring certain structural outer, can epoxy resin be used to paste by outside geodesic structure this sensor encapsulation, when there being wind and rain load action in the above, piezoelectric ceramics sector-meeting produces the charge pulse signal of direct ratio load thereon, by this charge pulse signal of signal acquiring system collection analysis, the size of corresponding wind and rain load can be calculated again according to the piezoelectric constant of piezoelectric ceramic piece, finally can obtain the whole stress field acted on above sensor encapsulation.Therefore, the present invention compares other monitoring method, reliable and stable, and cost is low, highly sensitive, easy to implement, is applicable to widely using on a large scale.
Accompanying drawing explanation
Fig. 1 is the structural representation of sensor encapsulation in the present invention;
Fig. 2 is the fundamental diagram of the monitoring method of body structure surface wind and rain load of the present invention;
By reference to the accompanying drawings, make the following instructions:
1---signal acquiring system 2---sensor encapsulation
21---encapsulating material 22---piezoceramic transducer
Embodiment
In order to more clearly understand technology contents of the present invention, describe in detail especially exemplified by following examples, its object is only better understand content of the present invention but not limit the scope of the invention.
As shown in Figure 1, a kind of monitoring system of body structure surface wind and rain load, comprise signal acquiring system 1 and sensor encapsulation 2, described sensor encapsulation is pasted on tested structural outer surface; Described sensor encapsulation comprises encapsulating material 21 and is located at several piezoceramic transducers 22 being arranged into array in described encapsulating material by the accurate Non-stress packaging method that flushes, and described piezoceramic transducer is connected with described signal acquiring system; Described piezoceramic transducer can produce the charge pulse signal of corresponding wind and rain load action power on it, and is transferred to described signal acquiring system; Described signal acquiring system can according to the charge pulse signal of each piezoceramic transducer received, and analyzing and processing obtains acting on the stress field on sensor encapsulation surface.Like this, flush Non-stress packaging method by standard and be encapsulated in encapsulating material by several piezoceramic transducers being arranged into array and form sensor encapsulation, the piezoelectric ceramic piece matter that can solve piezoceramic transducer is crisp, the problem of water proofing property difference, and in piezoceramic transducer hinge structure, MEMS element has lower-cost significant advantage.By being used by sensor encapsulation epoxy resin to be pasted onto tested body structure surface, the wind and rain load of piezoceramic transducer to body structure surface can be utilized to carry out Real-Time Monitoring; Each piezoceramic transducer is connected by signal acquiring system, the charge pulse signal due to the generation of wind and rain load action power on piezoceramic transducer can be gathered, then, according to the charge pulse signal of each piezoceramic transducer received, analyzing and processing obtains acting on the stress field on sensor encapsulation surface, namely can carry out Real-Time Monitoring by the wind and rain load small to body structure surface.
Preferably, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece; Described encapsulating material is waterproof, corrosion resistant flexible material, and several piezoelectric ceramic pieces being arranged into array flush Non-stress packaging method by standard and are encapsulated in this encapsulating material.Like this, by use waterproof, corrosion resistant flexible material (polymkeric substance), piezoelectric ceramic piece and electronic circuit are encapsulated, the encapsulating to piezoelectric ceramics chip arrays can be realized, crisp to solve piezoelectric ceramic piece matter, the problem of water proofing property difference.Wherein, the monitoring principle of piezoelectric ceramic piece is as follows: piezoelectric ceramics has piezoelectric effect, and when applying acting force to its surface, piezoelectric ceramics can produce the electric charge be directly proportional to acting force, by the size of piezoelectric ceramics output charge amount, the stressed size of piezoelectric ceramics can be judged.Take piezoelectric ceramics as the piezoceramic transducer of sensitive element (sensing element), flush Non-stress packaging by multi-disc piezoelectric ceramics standard and form, the stress field on its surface of effect can be accurately measured.
Preferably, described piezoelectric ceramic piece is square, and area is 25mm
2; Thickness is 10mm, and the spacing between adjacent two piezoelectric ceramic pieces is 5mm.
As shown in Figure 2, a kind of monitoring method of body structure surface wind and rain load, comprises the steps:
A. sensor package,
Several piezoceramic transducers are arranged into array, and use encapsulating material to encapsulate, form sensor encapsulation;
B. sensor is arranged,
Used by sensor encapsulation epoxy resin to be pasted onto tested body structure surface, carry out wind and rain load Real-Time Monitoring;
C. signals collecting,
Each piezoceramic transducer is connected with a signal acquiring system, by signal acquiring system, the charge pulse signal that piezoelectric ceramic piece each in sensor encapsulation produces is gathered;
D. load calculates,
According to direct piezo electric effect, the charge pulse signal produced by the piezoceramic transducer collected and the piezoelectric constant of piezoceramic transducer self calculate the load suffered by each piezoceramic transducer, according to said method, the stress field of whole sensor package surface is finally obtained.Namely the stress field of the load stress composition of all the sensors is the stress field of whole sensor package surface.
Preferably, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece; Described encapsulating material is waterproof, corrosion resistant flexible material, and several piezoelectric ceramic pieces being arranged into array flush Non-stress packaging method by standard and are encapsulated in this encapsulating material.
Preferably, described piezoelectric ceramic piece is square, and area is 25mm
2; Thickness is 10mm, and the spacing between adjacent two piezoelectric ceramic pieces is 5mm.
To sum up, the invention provides a kind of monitoring method of body structure surface wind and rain load, first, several piezoelectric ceramic pieces and electronic circuit are arranged in array format, form piezoceramic transducer array, then its outer use there is water proofing property, corrosion resistant flexible material carries out standard and flushes Non-stress packaging method, forms sensor encapsulation.When needing the wind and rain load measuring certain structural outer, can epoxy resin be used to paste by outside geodesic structure this sensor encapsulation, when there being wind and rain load action in the above, piezoelectric ceramics sector-meeting produces the charge pulse signal of direct ratio load thereon, by this charge pulse signal of signal acquiring system collection analysis, the size of corresponding wind and rain load can be calculated again according to the piezoelectric constant of piezoelectric ceramic piece, finally can obtain the whole stress field acted on above sensor encapsulation.Therefore, the present invention compares other monitoring method, reliable and stable, and cost is low, highly sensitive, easy to implement, is applicable to widely using on a large scale.
Above embodiment is with reference to accompanying drawing, to a preferred embodiment of the present invention will be described in detail.Those skilled in the art by carrying out amendment on various forms or change to above-described embodiment, but when not deviating from essence of the present invention, drops within protection scope of the present invention.
Claims (6)
1. a monitoring system for body structure surface wind and rain load, is characterized in that: comprise signal acquiring system (1) and sensor encapsulation (2), described sensor encapsulation is pasted on tested structural outer surface; Described sensor encapsulation comprises encapsulating material (21) and is located at several piezoceramic transducers (22) being arranged into array in described encapsulating material by the accurate Non-stress packaging method that flushes, and described piezoceramic transducer is connected with described signal acquiring system; Described piezoceramic transducer can produce the charge pulse signal of corresponding wind and rain load action power on it, and is transferred to described signal acquiring system; Described signal acquiring system can according to the charge pulse signal of each piezoceramic transducer received, and analyzing and processing obtains acting on the stress field on sensor encapsulation surface.
2. the monitoring system of body structure surface wind and rain load according to claim 1, is characterized in that, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece; Described encapsulating material is waterproof, corrosion resistant flexible material, and several piezoelectric ceramic pieces being arranged into array flush Non-stress packaging method by standard and are encapsulated in this flexible material.
3. the monitoring system of body structure surface wind and rain load according to claim 2, it is characterized in that, described piezoelectric ceramic piece is square, and area is 25mm
2; Thickness is 10mm, and the spacing between adjacent two piezoelectric ceramic pieces is 5mm.
4. a monitoring method for body structure surface wind and rain load, is characterized in that: comprise the steps:
A. sensor package,
Several piezoceramic transducers are arranged into array, and use encapsulating material to carry out standard to flush Non-stress packaging, form sensor encapsulation;
B. sensor is arranged,
Used by sensor encapsulation epoxy resin to be pasted onto tested body structure surface, carry out wind and rain load Real-Time Monitoring;
C. signals collecting,
Each piezoceramic transducer is connected with a signal acquiring system, by signal acquiring system, the charge pulse signal that piezoelectric ceramic piece each in sensor encapsulation produces is gathered;
D. load calculates,
According to direct piezo electric effect, the charge pulse signal produced by the piezoceramic transducer collected and the piezoelectric constant of piezoceramic transducer self calculate the load suffered by each piezoceramic transducer, according to said method, the stress field of whole sensor package surface is finally obtained.
5. the monitoring method of body structure surface wind and rain load according to claim 4, is characterized in that, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece; Described encapsulating material is waterproof, corrosion resistant flexible material, and several piezoelectric ceramic pieces being arranged into array flush Non-stress packaging method by standard and are encapsulated in this encapsulating material.
6. the monitoring method of body structure surface wind and rain load according to claim 5, it is characterized in that, described piezoelectric ceramic piece is square, and area is 25mm
2; Thickness is 10mm, and the spacing between adjacent two piezoelectric ceramic pieces is 5mm.
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Cited By (3)
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| CN109211514A (en) * | 2018-10-31 | 2019-01-15 | 大连理工大学 | A kind of rainfall collision force measuring device |
| CN112945362A (en) * | 2021-01-29 | 2021-06-11 | 长安大学 | Dynamic sensing device and measuring method for axle weight and vehicle speed |
| CN114061810A (en) * | 2021-11-03 | 2022-02-18 | 重庆大学 | Three-dimensional stress wave propagation monitoring device and method |
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Cited By (5)
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| CN109211514A (en) * | 2018-10-31 | 2019-01-15 | 大连理工大学 | A kind of rainfall collision force measuring device |
| CN109211514B (en) * | 2018-10-31 | 2024-03-08 | 大连理工大学 | Rainfall collision force measuring device |
| CN112945362A (en) * | 2021-01-29 | 2021-06-11 | 长安大学 | Dynamic sensing device and measuring method for axle weight and vehicle speed |
| CN114061810A (en) * | 2021-11-03 | 2022-02-18 | 重庆大学 | Three-dimensional stress wave propagation monitoring device and method |
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