CN102564548B - Dynamic weighing piezoelectric sensor for vehicle - Google Patents

Dynamic weighing piezoelectric sensor for vehicle Download PDF

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Publication number
CN102564548B
CN102564548B CN201210014978.4A CN201210014978A CN102564548B CN 102564548 B CN102564548 B CN 102564548B CN 201210014978 A CN201210014978 A CN 201210014978A CN 102564548 B CN102564548 B CN 102564548B
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CN
China
Prior art keywords
stress
described
weighing
check weighing
piezoelectric sensor
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CN201210014978.4A
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Chinese (zh)
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CN102564548A (en
Inventor
岳正军
涂必文
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郑州衡量电子科技有限公司
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Priority to CN201210014978.4A priority Critical patent/CN102564548B/en
Publication of CN102564548A publication Critical patent/CN102564548A/en
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Publication of CN102564548B publication Critical patent/CN102564548B/en

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Abstract

The invention provides a dynamic weighing piezoelectric sensor for a vehicle. The dynamic weighing piezoelectric sensor comprises a weighing stress profile and a quartz piezoelectric sensor; the weighing stress profile comprises a stress deformation cavity, a weighing stress top plate and a weighing supporting bottom plate; the quartz piezoelectric sensor is arranged in the stress deformation cavity; the upper and lower stress surfaces of the quartz piezoelectric sensor are respectively in contact with the upper and lower deformation stress inner cavity surfaces of the stress deformation cavity; the weighing stress top plate is arranged in parallel to the weighing supporting bottom plate; the stress deformation cavity is arranged between the weighing stress top plate and the weighing supporting bottom plate; and the centers of the upper and lower outer cavity surfaces of the stress deformation cavity are respectively arranged in the centers of the weighing stress top plate and the weighing supporting bottom plate. The dynamic weighing piezoelectric sensor for the vehicle has the advantages of scientific design, capability of realizing dynamic measurement, high measurement value precision and high weighing efficiency, and is easy to produce and install.

Description

Dynamic weighing piezoelectric sensor for vehicle

Technical field

The present invention relates to a kind of sensor, specifically, relate to a kind of dynamic weighing piezoelectric sensor for vehicle.

Background technology

The sensor kind of existing vehicle weighing system includes force transformation formula, bridge-type, bended plate type, etc., the physical dimension of these sensors is very large, and weigh for be the weight of whole axle; It is made by the steel plate of tons of conventionally, such design waste resource, and in actual installation, exists that great in constructing amount, long construction period, installation are complicated, the long problems such as traffic that affect of cement solidification time, in later stage use procedure, also there is draining inconvenience, safeguard problem frequently; Moreover existing sensor is weighed, most of kinetic measurements are more a lot of than static measurement low precision, to vehicle pass-through, bring very burden, measure inefficiency, affect traffic.

In order to solve the problem of above existence, people are seeking a kind of desirable technical solution always.

Summary of the invention

The object of the invention is for the deficiencies in the prior art, thereby a kind of design science is provided, can realizes dynamically weighting, measured value precision is high, check weighing efficiency is high, be easy to the dynamic weighing piezoelectric sensor for vehicle producing and install.

To achieve these goals, the technical solution adopted in the present invention is: a kind of dynamic weighing piezoelectric sensor for vehicle, it includes the stressed section bar of check weighing and quartz piezoelectric sensor, the stressed section bar of described check weighing includes stress and deformation cavity, described quartz piezoelectric sensor setting is in described stress and deformation cavity, and the bearing up-down force face of described quartz piezoelectric sensor contacts with the stressed inner cavity surface of deformation up and down of described stress and deformation cavity respectively.

Based on above-mentioned, the stressed section bar of described check weighing also includes the stressed top board of check weighing and check weighing support baseboard, and described stress and deformation cavity is arranged between the stressed top board of described check weighing and described check weighing support baseboard.

Based on above-mentioned, the stressed top board of described check weighing and described check weighing support baseboard be arranged in parallel, and the center of external cavity surface up and down of described stress and deformation cavity is separately positioned on the center of the stressed top board of described check weighing and described check weighing support baseboard.

Based on above-mentioned, it also includes the road surface stress layer being arranged on the stressed top board of described check weighing.

Based on above-mentioned, between the stressed top board of described check weighing and described road surface stress layer, be provided with two groups of bars that test the speed.

Based on above-mentioned, the both sides of described stress and deformation cavity are respectively arranged with buffer compartment absciss layer.

Based on above-mentioned, the both sides of described road surface stress layer and the stressed top board of described check weighing are respectively arranged with separation layer.

The relative prior art of the present invention has outstanding substantive distinguishing features and marked improvement, and specifically, this dynamic weighing piezoelectric sensor for vehicle can be realized the check weighing that do not stop, and kinetic measurement value is accurate, precision is high; In addition, its good weatherability, without temperature and time drift, horizontal unbalance loading high conformity, natural frequency is high, weighing accuracy long time stability; Moreover, easily to install, road surface injury is little, short construction period, long service life, consistent with pavement life, be applicable to existing freeway facility; This dynamic weighing piezoelectric sensor for vehicle reasonable in design, quartz piezoelectric sensor stress equalization, high conformity, it has advantages of design science, can realize dynamically weighting, measured value precision is high, check weighing efficiency is high, be easy to produce and install.

Accompanying drawing explanation

Fig. 1 is cross section structure schematic diagram of the present invention.

In figure: 11. stress deformation cavitys, the stressed top board of 12. check weighing, 13. check weighing support baseboards, 2. quartz piezoelectric sensor, the bar that 3. tests the speed, 4. road surface stress layer, 5. buffer compartment absciss layer, 6. separation layer.

Embodiment

Below by embodiment, technical scheme of the present invention is described in further detail.

As shown in Figure 1, a kind of dynamic weighing piezoelectric sensor for vehicle, this sensor integral body is strip, and it includes the road surface stress layer 4 of strip, the stressed section bar of check weighing of strip and the quartz piezoelectric sensor 2 of strip.

The stressed section bar of described check weighing includes stress and deformation cavity 11, the stressed top board 12 of check weighing and check weighing support baseboard 13, wherein, the stressed top board 12 of described check weighing be arranged in parallel with described check weighing support baseboard 13, described stress and deformation cavity 11 is arranged between the stressed top board 12 of described check weighing and described check weighing support baseboard 13, and the center of external cavity surface up and down of described stress and deformation cavity 11 is separately positioned on the stressed top board 12 of described check weighing and described check weighing support baseboard 13 center; The stressed top board 12 of described check weighing is parallel to each other with described check weighing support baseboard 13, and the upper and lower cavity face of described stress and deformation cavity 11 is parallel to each other, so that stress and deformation cavity 11 vertical applied forces are balanced; The two side of described stress and deformation cavity 11 is outer arch shape, is beneficial to the 11 vertical applied force deformation of stress and deformation cavity; The two side deformation of described stress and deformation cavity 11 has certain component, but component is very little, and component is directly proportional to external force.

Described quartz piezoelectric sensor 2 is arranged in described stress and deformation cavity 11, and the bearing up-down force face of described quartz piezoelectric sensor 2 contacts with the stressed inner cavity surface of deformation up and down of described stress and deformation cavity 11 respectively; Described road surface stress layer 4 is arranged on the stressed top board 12 of described check weighing, and the bearing up-down force face of described quartz piezoelectric sensor 2 is positioned at the vertical applied force center of the stressed section bar of described check weighing.

Between the stressed top board 12 of described check weighing and described road surface stress layer 4, be provided with two groups of bars 3 that test the speed, described in the upper surface of bar 3 upper surfaces higher than the stressed top board 12 of described check weighing that test the speed; By two groups of bars 3 that test the speed, can calculate the speed of a motor vehicle of vehicle.

During installation, in the direction perpendicular to highway, dig the groove that 75mm is wide, 70mm is dark, then, make described check weighing support baseboard 13 down, this dynamic weighing piezoelectric sensor for vehicle is positioned in described groove, then build embedding and fix.

The both sides of described stress and deformation cavity 11 are respectively arranged with buffer compartment absciss layer 5, and described buffer compartment absciss layer 5 consists of frothing foam; When stress and deformation cavity 11 outwards produces deformation, buffer compartment absciss layer 5 can play buffer action, in addition, building embedding fixedly time, can play the buffer action between Embedding Material and sensor.

The both sides of described road surface stress layer 4 and the stressed top board 12 of described check weighing are respectively arranged with separation layer 6, and described separation layer 6 consists of foam; Building embedding fixedly time, separation layer 6 can play the buffer action between Embedding Material and sensor.

Vehicle, by road surface stress layer 4, then, passes to the stressed top board 12 of check weighing and stress and deformation cavity 11 by gravity successively, and now, stress and deformation cavity 11 vertical applied forces also micro-deformation occur; Stress and deformation cavity 11 vertical deformations, the stressed inner cavity surface of deformation up and down of stress and deformation cavity 11 passes to vertical strength in the bearing up-down force face of quartz piezoelectric sensor 2, and now, quartz piezoelectric sensor 2 stress and deformations, produce electric charge; That is, utilize quartz piezoelectric effect, when vehicle or weight are pressed on quartz crystal, quartz crystal the two poles of the earth produce electric charge, because the quantity of electric charge is directly proportional to external force size, with circuit detect produced electric charge number, can calculate the weight of vehicle or weight.

Piezoelectric effect refers to some crystal, and when being subject to External Force Acting along certain orientation, inner meeting produces polarization phenomena, produces the electric charge that equal and opposite in direction symbol is contrary at it on certain two surface simultaneously; After external force is removed, return to again not electriferous state; When force direction changes, the polarity of electric charge is also along with change; Stressed the produced quantity of electric charge of crystal is directly proportional to the size of external force.

Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement the specific embodiment of the present invention; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.

Claims (2)

1. a dynamic weighing piezoelectric sensor for vehicle, it includes the stressed section bar of check weighing and quartz piezoelectric sensor, the stressed section bar of described check weighing includes stress and deformation cavity, described quartz piezoelectric sensor setting is in described stress and deformation cavity, and the bearing up-down force face of described quartz piezoelectric sensor contacts with the stressed inner cavity surface of deformation up and down of described stress and deformation cavity respectively; The stressed section bar of described check weighing also includes the stressed top board of check weighing and check weighing support baseboard, and described stress and deformation cavity is arranged between the stressed top board of described check weighing and described check weighing support baseboard; The stressed top board of described check weighing and described check weighing support baseboard be arranged in parallel, and the center of external cavity surface up and down of described stress and deformation cavity is separately positioned on the center of the stressed top board of described check weighing and described check weighing support baseboard; On the stressed top board of described check weighing, be provided with road surface stress layer; The both sides of described stress and deformation cavity are respectively arranged with buffer compartment absciss layer; The both sides of described road surface stress layer and the stressed top board of described check weighing are respectively arranged with separation layer, it is characterized in that: between the stressed top board of described check weighing and described road surface stress layer, be provided with two groups of bars that test the speed, described in the upper surface of bar upper surface higher than the stressed top board of described check weighing that test the speed.
2. dynamic weighing piezoelectric sensor for vehicle according to claim 1, is characterized in that: the both sides of described stress and deformation cavity are respectively arranged with buffer compartment absciss layer.
CN201210014978.4A 2012-01-18 2012-01-18 Dynamic weighing piezoelectric sensor for vehicle CN102564548B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210014978.4A CN102564548B (en) 2012-01-18 2012-01-18 Dynamic weighing piezoelectric sensor for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210014978.4A CN102564548B (en) 2012-01-18 2012-01-18 Dynamic weighing piezoelectric sensor for vehicle

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Publication Number Publication Date
CN102564548A CN102564548A (en) 2012-07-11
CN102564548B true CN102564548B (en) 2014-04-16

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CN104318805A (en) * 2014-10-28 2015-01-28 成都和音科技有限公司 Sensing bar for parking
CN104374459A (en) * 2014-11-01 2015-02-25 绵阳市奇石缘科技有限公司 I-beam type vehicle dynamic weighing sensor
CN105136354A (en) * 2015-08-18 2015-12-09 吉林大学 Highway pavement load spectrum piezoelectric arc detection apparatus
CN107768164A (en) * 2017-12-08 2018-03-06 江苏省交通技师学院 A kind of guide pin bushing spring pressure switch
CN108801417A (en) * 2018-04-10 2018-11-13 广州晶石传感技术有限公司 Sound double mode weighing sensor
CN108801428A (en) * 2018-04-10 2018-11-13 广州晶石传感技术有限公司 A kind of sound double mode weighing sensor shell section material
CN108470658A (en) * 2018-06-05 2018-08-31 江苏省交通技师学院 A kind of foam pressure formula switch
CN109506747A (en) * 2018-11-28 2019-03-22 中北大学 A kind of weighing piezoelectric transducer, preparation method and freeway weighing system

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US4793429A (en) * 1988-04-20 1988-12-27 Westinghouse Electric Corp. Dynamic vehicle-weighing system
US5501111A (en) * 1990-12-09 1996-03-26 Kistler Instrumente Ag Force sensor systems especially for determining dynamically the axle load, speed, wheelbase and gross weight of vehicles
US5410109A (en) * 1993-04-22 1995-04-25 Tarter; Ralph E. Vehicle on-board weighing system and method
CH689599A5 (en) * 1993-11-23 1999-06-30 Kk Holding Ag Transducer arrangement for installation in carriageways for the purpose of detecting the weights and / or the driving dynamic reactions of vehicle wheels.
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CN101625254B (en) * 2009-07-20 2013-12-18 江西省交通运输技术创新中心 Piezoelectric type dynamic strip-shaped weighing plate
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CN202420639U (en) * 2012-01-18 2012-09-05 郑州衡量电子科技有限公司 Piezoelectric sensor for dynamic weight measurement of vehicle

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Address after: 450001 Zhengzhou City, Henan High-tech Zone electronic and electrical industrial park long Ding enterprise center two red Nan Road 8

Patentee after: Zhengzhou measurement of Polytron Technologies Inc

Address before: Room 103, room 5, Sakura street, Zhengzhou high tech Development Zone, Henan, Henan

Patentee before: Zhengzhou Hengliang Electronic Science & Technology Co., Ltd.

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