CN201003975Y - Plate ring type sensor - Google Patents

Abstract

The utility model discloses a plate-ring type sensor, comprising an elastic body (1) with an embedding groove (5) at the bottom, a pressure gauge (2) with a connecting lead (4) in the embedding groove (5), and is characterized in that a cover plate (6) is arranged outside the bottom of the elastic body (1). The utility model has the advantages of simple structure, elastic deformation of the elastic body is not easy to occur, good linearity of the sensor, high measurement accuracy, and convenient use and maintenance.

Description

Plate ring sensor

technical field

The utility model relates to a sensor, in particular to a portable sensor used for vehicle wheel weight or axle weight weighing.

Background technique

With the development of road traffic, for road protection and safety monitoring, it is necessary to limit the weight of vehicles driving on the road. Usually, the weighing of the wheel weight or axle weight of the vehicle is carried out with fixed equipment, and its structure is complicated. , high cost and inconvenient to use, a portable weighing device has appeared, which is light in weight and simple to make. It is composed of a plurality of elastic bodies 1 connected as shown in Figure 1. The protruding bearing head 3 has a receiving groove (not shown in the figure) on its bottom surface. The resistance strain gauge 2 can be accommodated in the receiving groove and connected to an external circuit board through a lead wire 4. When in use, the bearing head 3 can accurately sense In the case of stress, the resistance value of the elastic body 1 changes after being pressed, which can cause the pressure gauge 2 to generate an output measurement signal. It has a simple structure and good measurement accuracy, but when the carrier 3 is displaced downward under pressure, it will cause elastic The periphery of the body 1 is excessively bent upwards, so that the moment arm of the bending stress will inevitably produce a slight elongation, and there is an objective upward warping characteristic between the stress and strain and the measuring range of the sensor, which directly affects the measurement accuracy of the sensor, so there is still room for improvement .

Contents of the invention

The purpose of the utility model is to provide a plate ring sensor with small excessive deformation and higher precision.

The technical solution of the utility model is: a plate ring sensor, comprising an elastic body with an embedded groove at the bottom, a pressure gauge for connecting lead wires is arranged in the embedded groove, and a cover plate is arranged at the bottom of the elastic body.

There is a cover plate at the bottom of the elastic body, which fixes the bottom of the elastic body, which can prevent the elastic body from being displaced outward and excessively upturned when it is stressed, so as to avoid the upward warping of the linear curve and ensure the measurement accuracy of the pressure gauge. The measurement accuracy can be from The existing 5/1000 is increased to 1/1000 or even 2/10000, while the structure is simple.

The bottom of the elastic body is provided with an annular groove, and a sealing gasket is arranged in the annular groove, which can seal the gap between the cover plate and the elastic body, and prevent the pressure gauge in the embedded groove from being damaged.

As an optimized solution, the said annular groove is provided with an extended wire groove, and the side wall of the wire groove is provided with a lead hole communicating with the outside of the embedding groove and the elastic body respectively. The sealing pad is provided with a convex portion with a through hole, and the wires are sequentially passed through the lead hole and the through hole to be connected with the pressure gauge. In this way, it is possible to avoid opening holes on the cover plate to connect lead wires, destroying the rigidity of the cover plate, thereby affecting its stress and strain, and ensuring measurement accuracy.

In order to facilitate disassembly and reuse, the cover plate and the elastic body are flexibly connected, and the cover plate can be fixed by means of screw connection, etc., which can also avoid damage to the strain gauge during disassembly.

The utility model has the advantages that the structure is simple, the elastic body is not easy to be elastically deformed, the linearity of the sensor is good, the measurement precision is high, and the use and maintenance are convenient.

Description of drawings

Accompanying drawing 1 is the structural representation of sensor in the prior art;

Accompanying drawing 2 is the structural representation of the utility model embodiment;

Accompanying drawing 3 is the rear view of the elastic body in the utility model embodiment;

Accompanying drawing 4 is A-A direction sectional view among Fig. 3;

1. Elastomer, 2. Pressure gauge, 3. Bearing head, 4. Lead wire, 5. Embedded groove, 6. Cover plate, 7. Annular groove, 8. Gasket, 9. Convex part, 10. Through hole, 11, wire groove, 12, lead hole, 13, lead hole.

Detailed ways

Example:

Referring to Figures 2, 3 and 4, a plate-ring sensor includes an elastic body 1 with a slot 5 at the bottom, a protruding bearing head 3 on the surface of the elastic body 1, and a pressure gauge 2 inside the slot 5. , the strain gauge 2 is placed in the embedded groove 5 and connected to the external circuit board through the lead wire 4; an annular groove 7 is arranged at the bottom of the elastic body 1, and a sealing gasket 8 is arranged in the annular groove 7, and a flexible connection device is arranged outside the bottom surface of the elastic body 1 There is a cover plate 6, the cover plate 6 can be connected to the bottom of the elastic body 1 by bolts, and can also be connected to the bottom of the elastic body 1 by other possible flexible connection methods, the purpose of which is to facilitate disassembly and maintenance of the sensor. For better sealing, the annular groove 7 is provided with an extended wire groove 11, and the side wall of the wire groove 11 is provided with lead holes 12, 13 respectively communicating with the outside of the embedding groove 5 and the elastic body 1. The pad 8 is provided with a protrusion 9 having a through hole 10 , and the lead wire 4 passes through the lead hole 12 , the through hole 10 , and the lead hole 13 to connect with the piezometer 2 in sequence.

When in use, the bearing head 3 can accurately sense the force, and then move downward after being pressed, and transmit the corresponding stress to the elastic body 1. After the elastic body 1 is pressed, the resistance value changes, which can make the pressure gauge 2 generate For measuring signals, the cover plate 6 provided at the bottom of the elastic body 1 can fix the bottom of the elastic body 1, avoiding the outward displacement and upward excessive bending deformation of the elastic body when it is stressed, improving the linearity and ensuring the measurement accuracy of the pressure gauge , from the original 5/1000 to 1/10000 or even 2/10,000, which can prevent the pressure gauge in the slot from being damaged by corrosion.

The above detailed description is a specific description for one of the feasible embodiments of the present utility model. This embodiment is not intended to limit the patent scope of the present utility model. Any equivalent implementation or change that does not deviate from the utility model shall include within the patent scope of this case.

Claims (4)

1. A plate-ring type sensor, comprising an elastic body (1) that is provided with an embedding groove (5) at the bottom, and a pressure gauge (2) that connects the lead wire (4) in the embedding groove (5), is characterized in that: A cover plate (6) is arranged outside the bottom of the elastic body (1). 2. The plate-ring sensor according to claim 1, characterized in that: the bottom surface of the elastic body (1) is provided with an annular groove (7), and a sealing gasket (8) is arranged in the annular groove (7). 3. The plate-ring sensor according to claim 2, characterized in that: said annular groove (7) is provided with an extended wire groove (11), and the side walls of the wire groove (11) are respectively provided with The lead holes (12), (13) communicated with the outside of the embedding groove (5) and the elastic body (1), and correspondingly provided with a through hole (10) on the gasket (8). The protruding part (9), the lead wire (4) passes through the lead hole (12), the through hole (10) and the lead hole (13) in order to be connected with the pressure gauge (2). 4. The plate-ring sensor according to claim 1, 2 or 3, characterized in that: the cover plate (6) and the elastic body (1) are movably connected.

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