Unlock instant, AI-driven research and patent intelligence for your innovation.

Weighing piezoelectric sensor, manufacturing method thereof and highway 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: 2019-03-22
ZHONGBEI UNIV
View PDF6 Cites 4 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Weighing piezoelectric sensor, manufacturing method thereof and highway weighing system
  • Weighing piezoelectric sensor, manufacturing method thereof and highway weighing system
  • Weighing piezoelectric sensor, manufacturing method thereof and highway weighing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

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

Embodiment 2

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

[0055] The weighing piezoelectric sensor also includes a housing 5, the pressure conduction structure 1, the pre-tightening splint 2, the quartz piezoelectric crystal 3 and the signal conditioning circuit 4 are sealed by hollow glass microsphere reinforced foam plastic 6. A preset structure, the preset structure is arranged in the casing 5 . Hollow glass microsphere reinforced foam plastics 6 are bonded around the pressure conduction structure 1, the pre-tightening splint 2, the quartz piezoelectric crystal 3 and the signal conditioning circuit 4, and form a square shape, and finally put into the shell 5, the The material is elastic and light in weight. This structure can eliminate lateral vibration to a certain extent without affecting the vertical force measurement of the sensor. Shell 5 length has multiple forms, is 1000mm, 1500m...

Embodiment 3

[0061] Embodiment 3 of the present invention provides another preferred implementation 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 thickness of the symmetrical pretension side plate 22 of the pretension splint 2 The height of the bottom plate 21 is 10mm, the width is 100mm, and the length is 200mm; the circuit board width 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 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Yield strengthaaaaaaaaaa
Elastic modulusaaaaaaaaaa
Login to View More

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, its preparation method and expressway weighing system. Background technique [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. The road is long. 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 transmi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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