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A weighing piezoelectric sensor, its preparation method and expressway weighing system

A sensor and heavy-duty technology, applied in the field of highway weighing system, can solve the problems of great influence of traffic flow, plastic deformation, and decreased accuracy, so as to improve life and work stability, good corrosion resistance, and reduce weight. Effect

Active Publication Date: 2020-11-17
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The expressway weighing system is suitable for the expressway toll-by-weight system, and can be used for overload control, overspeed control and road monitoring. At present, most of the load cells used on the road are bulky and require the help of heavy machinery during installation. The traffic flow has a great influence, and it is easy to cause traffic jams. For example: the whole vehicle weighing scheme, the distance between the center line of the dynamic scale and the center line of the toll booth is about 20 meters. long road
Others, such as the bending plate weighing scheme, are bulky, and the bending plate will produce plastic deformation after long-term rolling, which will reduce the accuracy, and the existing weighing scheme obtains and transmits analog signals, which will cause signal distortion

Method used

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  • A weighing piezoelectric sensor, its preparation method and expressway weighing system
  • A weighing piezoelectric sensor, its preparation method and expressway weighing system
  • A weighing piezoelectric sensor, its preparation method and expressway weighing system

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Embodiment 1 of the present invention provides a weighing piezoelectric sensor.

[0048] like figure 1 As shown, the weighing piezoelectric sensor includes:

[0049]The pressure conduction structure 1, the preloading force splint 2, the quartz piezoelectric crystal 3 and the signal conditioning circuit 4; Arranged above the bottom plate 21, the two symmetrical pre-tightening side plates 22 clamp the pressure conduction structure 1 above the quartz piezoelectric crystal 3; the quartz piezoelectric crystal 3 is provided with electrode, the quartz piezoelectric crystal is connected to the signal conditioning circuit 4 through the electrode, the quartz piezoelectric crystal 3 is used to weigh the analog signal of the weight applied on the pressure conduction structure, and the The analog signal of weight is sent to the signal conditioning circuit; the signal conditioning circuit 4 is used to convert the analog signal of weight output by the quartz piezoelectric crystal 3 ...

Embodiment 2

[0054] Embodiment 2 of the present invention provides a preferred embodiment of the weighing piezoelectric sensor of the present invention.

[0055] The weighing piezoelectric sensor also includes a housing 5, and the pressure conducting structure 1, the pre-tensioning splint 2, the quartz piezoelectric crystal 3 and the signal conditioning circuit 4 are sealed by hollow glass microspheres reinforced foam plastic 6. A preset structure, the preset structure is provided in the casing 5 . The hollow glass microsphere reinforced foam plastic 6 is bonded to the pressure conduction structure 1, the pre-tensioning splint 2, the quartz piezoelectric crystal 3 and the signal conditioning circuit 4, and is formed into a square shape, and finally put into the housing 5. The material is elastic and light in weight. The structure can eliminate lateral vibration to a certain extent without affecting the vertical force measurement of the sensor. The shell 5 has various lengths, such as 1000...

Embodiment 3

[0061] Embodiment 3 of the present invention provides another preferred embodiment of the weighing piezoelectric sensor of the present invention.

[0062] The thickness of the surface layer 7 is 5mm, the width is 80mm, and the thickness of the AB glue is 1mm; the height of the two quartz piezoelectric crystals 3 is 10mm, the width is 20mm, and the length is 200mm; The height of the bottom plate 21 is 10mm, the width is 100mm, and the length is 200mm; the width of the circuit board of the signal conditioning circuit 4 is 20mm, the diameter of the conduit 7 is 3mm, the height of the shell 5 is 88mm, and the width of the shell 5 is 106mm .

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Abstract

The invention discloses a weighing piezoelectric sensor, a manufacturing method thereof and a highway weighing system. The weighing piezoelectric sensor comprises a pressure transmission structure, aprestressed clamping plate, a quartz piezoelectric crystal and a signal conditioning circuit, wherein the prestressed clamping plate is composed of a bottom plate and two symmetric prestressed side plates, the quartz piezoelectric crystal is arranged above the bottom plate, and the two symmetric prestressed side plates clamps the pressure transmission structure above the quartz piezoelectric crystal; the quartz piezoelectric crystal is provided with an electrode and connected with the signal conditioning circuit through the electrode. The weighing piezoelectric sensor achieves weighing throughthe pressure transmission structure, the prestressed clamping plate and the quartz piezoelectric crystal to simplify the structure of the highway weighing system, and by converting measured analog signals into digital signals for transmission through the signal conditioning circuit, avoids distortion during a signal transmission process and improves the weighing precision.

Description

technical field [0001] The invention relates to the field of traffic supervision, in particular to a weighing piezoelectric sensor, a preparation method thereof and a highway weighing system. Background technique [0002] The highway weighing system is suitable for the highway weighing toll system, which can be used for overload control, overspeed control and road monitoring. At present, most of the load cells used on the road are bulky and require the help of heavy machinery during installation. The flow has a great influence and is likely to cause traffic congestion. For example: the whole vehicle weighing scheme, the distance between the center line of the dynamic weighing platform and the center line of the toll booth is about 20 meters. longer road. Others, such as the bent plate weighing scheme, are bulky, and the bending plate will produce plastic deformation after being rolled for a long time, which will reduce the accuracy, and the existing weighing scheme obtains ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01G19/02G01G21/00
CPCG01G19/021G01G21/00
Inventor 李新娥范锦彪杨伟艺杜红棉闵希凯王睿程亚杰王莎莎
Owner ZHONGBEI UNIV
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