CN216925768U - Pressure sensor for weighing vehicle - Google Patents
Pressure sensor for weighing vehicle Download PDFInfo
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- CN216925768U CN216925768U CN202220357839.0U CN202220357839U CN216925768U CN 216925768 U CN216925768 U CN 216925768U CN 202220357839 U CN202220357839 U CN 202220357839U CN 216925768 U CN216925768 U CN 216925768U
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Abstract
The utility model discloses a pressure sensor for vehicle weighing, which comprises a base, wherein a through hole is formed in the center of the base, grooves for placing annular metal blocks are symmetrically formed in two ends of the through hole, resistance strain gauges for detecting pressure are uniformly arranged on the inner wall of each annular metal block, at least two tangent planes are uniformly arranged on the outer wall of each annular metal block, and a stress transition plate is arranged on each annular metal block.
Description
Technical Field
The utility model relates to the field of vehicle sensors, in particular to a pressure sensor for vehicle weighing.
Background
The current vehicle-mounted weighing sensor scheme mainly comprises a weighing pressure sensor and a deformation displacement sensor.
The existing weighing pressure sensors mainly comprise cantilever beam weighing sensors, spoke type pressure sensors, S-shaped tension and compression sensors, tension sensors, micro sensors, diaphragm box type sensors, column type sensors, hanging type sensors, multi-dimensional force sensors, static torque sensors, dynamic torque sensors and the like, the sensors are used in the engineering field of various industries, the measured data and the precision of various applications are different, and a certain product needs to be selected according to requirements.
In the application field of the vehicle-mounted weighing system, the conventional weighing pressure sensor products listed above cannot be applied to the specific engineering application due to the factors of narrow installation space, frequent vibration impact, large pretightening force and the like. The wide-range pressure sensor is too large to be installed; the sensor with smaller size has too small measuring range and can not meet the requirement of bearing capacity required in the field of vehicle-mounted weighing application.
The deformation displacement sensor detects the micro-deformation or displacement of the frame or the axle and converts the micro-deformation or displacement into weight through an algorithm, and the defect is that the material characteristics of the frame or the axle are uncertain, so that the acquired micro-deformation or displacement is uncontrollable, the precision is low, and the error is large.
In view of these problems, a new sensor is needed which can accurately detect the load of a vehicle, and has small size, thin thickness, large measurement range and high precision, so that the utility model patent of application No. 202121911425. X: the application provides a solution in a weighing pressure sensor applied to a vehicle, but the application finds that the integral strength is insufficient and the sensor is easy to damage after long-time testing, so the application provides a solution for solving the problems.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims to provide a pressure sensor for weighing a vehicle, which improves the integral strength and firmness, improves the measurement accuracy and avoids potential safety hazards caused by the driving of the vehicle due to the sensor.
The technical scheme is as follows: the utility model relates to a pressure sensor for weighing a vehicle, which comprises a base and is characterized in that: the base center is provided with the perforation, the perforation both ends symmetry is provided with the recess of placing ring shape metal block, evenly be provided with the resistance strain gauge that is used for detecting pressure on the inner wall of ring shape metal block, evenly be provided with on the outer wall of ring shape metal block and be no less than two tangent planes, be provided with the atress on the ring shape metal block and cross the cab apron, the external diameter that the cab apron was crossed in the atress is greater than the external diameter of ring shape metal block.
Preferably, the groove comprises an upper notch and a lower notch, the height of the lower notch is not higher than that of the circular metal block, and the inner wall of the lower notch is matched with the outer wall of the circular metal block; the inner wall of the upper notch is matched with the outer wall of the stressed transition plate
Go up the inner wall of notch and lower notch and cross the cab apron with the atress respectively and match each other with the outer wall of ring shape metal block, be favorable to crossing the cab apron to the atress and the location of ring shape metal block on the horizontal plane, prevent to slide, simultaneously because be provided with the tangent plane on the ring shape metal block outer wall, the lower notch inner wall that corresponds is provided with the tangent plane because of matcing each other with ring shape metal block outer wall equally, the existence of tangent plane can prevent that ring shape metal block from taking place to rotate on the horizontal plane.
The arrangement of the stressed transition plate in the upper notch can ensure that the stressed surface of the circular metal block is the whole upper end surface forever, so that the measurement accuracy of the gravity is improved, and the stress is not uniform due to the change of the stressed position, thereby influencing the measurement accuracy.
Preferably, the thickness of the base is set to be between 15 and 25mm, and the thickness from the bottom surface of the base to the bottom of the lower notch is between 6 and 10 mm.
The increase in the thickness of the base can further improve the strength of the whole.
Preferably, chamfers for improving the measurement accuracy are arranged on the edge of the top surface and the edge of the bottom surface of the circular metal block.
Preferably, the stressed transition plate is connected with the base through a bolt, and the height of the stressed transition plate is higher than that of the upper notch.
The stressed transition plate is higher than the base, so that the weight of the vehicle can be completely applied to the stressed transition plate, and the measuring accuracy cannot be influenced.
Preferably, the through hole comprises an upper through hole and a lower through hole, the inner diameter of the upper through hole is larger than that of the lower through hole, a cylindrical metal block is connected in the lower through hole in an interference mode, and the cylindrical metal block protrudes out of the bottom of the base.
The punched hole is arranged for positioning the whole body in a vehicle, the upper punched hole is used for being connected with a screw cap head protruding from the bottom of a spring steel plate of the vehicle, the cylindrical metal block is used for being connected with a pit groove on the top plane of an axle in the vehicle, and the device is positioned between the axle of the vehicle and the spring steel plate through the upper punched hole and the cylindrical metal block, so that the weight of the vehicle is detected.
Preferably, a lateral threading hole is formed in the outer wall of the corresponding groove in the base, and a cable for transmitting a pressure signal detected by the resistance strain gauge to an external monitoring device is arranged in the lateral threading hole.
Has the advantages that:
(1) this application has improved the holistic intensity of device through the base of integration, prevents to produce in the course of the work because the damage that factors such as the vibrations of vehicle in the operation process lead to, and then has improved the safety of traveling of vehicle.
(2) The setting of transition plate is crossed through the atress to this application, has guaranteed that the area of ring shape metal block atress is fixed unchangeable, has further improved the degree of accuracy of measuring weight.
(3) This application sets up the tangent plane through the side at ring shape metal block to ensure that ring shape metal block can not rotate in the course of the work, and then improved the degree of accuracy of measuring weight.
(4) This application has improved the degree of accuracy of measuring weight through set up the chamfer at the up end edge and the lower terminal surface edge at ring shape metal block.
Drawings
FIG. 1 is a side view of the present application;
FIG. 2 is a top view of the subject application with the stressed transition plate removed;
FIG. 3 is a side view of a circular ring shaped metal block in the present application;
fig. 4 is a side sectional view of the present application after installation on a vehicle.
Detailed Description
The present application is further illustrated with reference to specific examples below.
As shown in fig. 1-3, which are structural schematic diagrams of the present application, in this embodiment, the present application includes a base 1, a thickness of the base 1 is 20mm, a through hole 2 is disposed in a center of the base 1, two ends of the through hole 2 are symmetrically provided with grooves 4 for placing a circular metal block 3, a stress transition plate 6 is disposed on the circular metal block 3, and an outer diameter of the stress transition plate 6 is greater than an outer diameter of the circular metal block 3.
In this embodiment, the through hole 2 comprises an upper through hole 21 and a lower through hole 22, the inner diameter of the upper through hole 21 is larger than that of the lower through hole 22, a cylindrical metal block 23 is connected in the lower through hole 22 in an interference mode, the cylindrical metal block 23 protrudes out of the bottom of the base 1, the device can be integrally positioned in the vehicle through the through hole 2, the upper through hole 21 is used for being connected with a nut head protruding out of the bottom of a spring steel plate 8 of the vehicle, the cylindrical metal block 23 is used for being connected with a pit groove in the top plane of an axle 9 in the vehicle, and the device is positioned between the axle 9 and the spring steel plate 8 of the vehicle through the upper through hole 21 and the cylindrical metal block 23, so that the weight of the vehicle is detected.
In this embodiment, evenly be provided with 4 tangent planes 5 on the outer wall of ring shape metal block 3, place in the lower notch 42 in recess 4, and the height that highly is not higher than ring shape metal block 3 of lower notch 42, the inner wall of lower notch 42 and the outer wall phase-match of ring shape metal block 3, consequently be provided with tangent plane 5 on the inner wall of lower notch 42 equally, the setting of the tangent plane 5 of lower notch 42 can effectually prevent that ring shape metal block 3 from rotating in notch 42 down, influence the degree of accuracy of weighing.
In the present embodiment, the height from the bottom surface of the lower notch 42 to the bottom surface of the base 1 is 8mm, which further improves the strength of the base 1 as a whole.
In the present embodiment, the edges of the top surface and the edges of the bottom surface of the circular metal block 3 are provided with chamfers 31 for improving the measurement accuracy.
In this embodiment, the groove 4 includes an upper notch 41 and a lower notch 42, the upper notch 41 is disposed above the lower notch 42, the inner wall of the upper notch 41 matches with the outer wall of the stressed transition plate 6, and the upper notch 41 is disposed to prevent the stressed transition plate 6 from sliding on a horizontal plane.
In the embodiment, the stressed transition plate 6 is connected with the base 1 through bolts, is 1mm higher than the upper notch 41, ensures that the weight of a vehicle is completely applied to the stressed transition plate 6, and can ensure that the stressed surface of the circular ring-shaped metal block 3 is the upper end surface of the whole circular ring-shaped metal block 3 due to the arrangement of the stressed transition plate 6, so that the stress is not uniform due to the change of the stressed position, and the measurement accuracy is not affected.
In this embodiment, evenly be provided with the resistance strain gage that is used for detecting pressure on the inner wall of ring shape metal block 3, the cable in the lateral direction through wires hole 7 that resistance strain gage passed through 1 on the base and set up on the corresponding recess 4 outer wall transmits the pressure signal that detects to outside monitoring devices.
As shown in fig. 4, which is a side cross-sectional view of the present embodiment after being installed on a vehicle, a screw head protruding from the bottom of the spring steel plate 8 of the vehicle extends into the upper through hole 21, and the cylindrical metal block 23 extends into a pit groove on the top plane of the axle 9, so that the present invention is fixed at a position a between the spring steel plate 8 and the axle 9, and after being installed on the vehicle, the present invention does not slide during the driving process of the vehicle, the accuracy of vehicle-mounted weight detection can be ensured, and the safety of the vehicle during driving can also be ensured.
Claims (7)
1. A pressure sensor for weighing a vehicle, comprising a base (1), characterized in that: base (1) center is provided with perforation (2), perforation (2) both ends symmetry is provided with recess (4) of placing ring shape metal block (3), evenly be provided with the resistance strain gauge that is used for detecting pressure on the inner wall of ring shape metal block (3), evenly be provided with on the outer wall of ring shape metal block (3) and be no less than two tangent plane (5), be provided with atress cab apron (6) on ring shape metal block (3), the external diameter that cab apron (6) was crossed in the atress is greater than the external diameter of ring shape metal block (3).
2. A pressure sensor for weighing a vehicle according to claim 1, wherein: the groove (4) comprises an upper notch (41) and a lower notch (42), the height of the lower notch (42) is not higher than that of the circular metal block (3), and the inner wall of the lower notch (42) is matched with the outer wall of the circular metal block (3); the inner wall of the upper notch (41) is matched with the outer wall of the stressed transition plate (6).
3. A pressure sensor for weighing a vehicle as recited in claim 1, wherein: the thickness of the base (1) is set between 15 mm and 25mm, and the thickness from the bottom surface of the base (1) to the bottom of the lower notch (42) is between 6 mm and 10 mm.
4. A pressure sensor for weighing a vehicle according to claim 1, wherein: and chamfers (31) for improving the measurement accuracy are arranged on the edges of the top surface and the bottom surface of the circular metal block (3).
5. A pressure sensor for weighing a vehicle as recited in claim 1, wherein: the stress transition plate (6) is connected with the base (1) through a bolt, and the height of the stress transition plate (6) is higher than that of the upper notch (41).
6. A pressure sensor for weighing a vehicle as recited in claim 1, wherein: the perforation (2) comprises an upper perforation (21) and a lower perforation (22), the inner diameter of the upper perforation (21) is larger than that of the lower perforation (22), a cylindrical metal block (23) is connected in the lower perforation (22) in an interference mode, and the cylindrical metal block (23) protrudes out of the bottom of the base (1).
7. A pressure sensor for weighing a vehicle as recited in claim 1, wherein: the base (1) is provided with lateral threading holes (7) on the outer wall corresponding to the grooves (4), and cables for transmitting pressure signals detected by the resistance strain gauges to an external monitoring device are arranged in the lateral threading holes (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220357839.0U CN216925768U (en) | 2022-02-22 | 2022-02-22 | Pressure sensor for weighing vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220357839.0U CN216925768U (en) | 2022-02-22 | 2022-02-22 | Pressure sensor for weighing vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216925768U true CN216925768U (en) | 2022-07-08 |
Family
ID=82267633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220357839.0U Active CN216925768U (en) | 2022-02-22 | 2022-02-22 | Pressure sensor for weighing vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216925768U (en) |
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2022
- 2022-02-22 CN CN202220357839.0U patent/CN216925768U/en active Active
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