Strain type narrow strip sensor

Abstract

The utility model discloses a strain type narrow strip sensor which comprises a force transmission device, the force transmission device comprises an elastic plate and a force transmission column arranged in the middle of the elastic plate, the bottom end of the elastic plate is recessed upwards to form a containing groove, the force transmission column is cylindrical, and the top end of the force transmission column extends upwards to be higher than the top face of the elastic plate. A strain area is arranged in the accommodating groove, at least two strain gauges are attached in the strain area, and the strain gauges are electrically connected; according to the strain type narrow strip sensor, the stress plate and the force transmission column are arranged in a split manner, so that the manufacturing difficulty and cost of the strain type narrow strip sensor are reduced; meanwhile, the force transmission column extending to be higher than the top end of the elastic plate can increase or decrease the height of the strain type narrow strip sensor by increasing or cutting off the force transmission column according to the height requirement of the strain type narrow strip sensor in use.

Description

Technical Field

[0001] This utility model relates to the field of weighing sensor technology, and in particular to a strain gauge narrow strip sensor. Background Technology

[0002] Overloaded vehicles severely damage highway infrastructure. Because the load of overloaded vehicles far exceeds the design load of highways and bridges, frequent travel accelerates road surface damage, leading to problems such as ruts and cracks, significantly shortening the normal service life of highways, and even potentially causing serious safety accidents such as bridge collapses. Therefore, the detection of vehicle overload is extremely important. Real-time monitoring and recording of the weight information of passing vehicles provides accurate data support for traffic management departments, which helps to achieve precise off-site enforcement and overload control. As a result, narrow strip weighing sensors with high precision, high speed, and high stability have gradually emerged by installing sensors in narrow areas to capture and measure the weight of objects in dynamic states in real time.

[0003] For example, Chinese utility model patent CN221571636U, entitled "Membrane-Type Weighing Sensor," discloses a diaphragm-type weighing sensor, including an elastomer, a signal assembly, a filler, and a bottom sealing plate. The elastomer includes a column, a connecting column, and a flange. The column is recessed from its end face towards the connecting column to form a deformation cavity. The flange and column are each provided with two or more upper connecting holes. The signal assembly includes a circuit board and a strain gauge assembly. The signal lines of the strain gauge assembly are connected to the circuit board, and the output lines of the circuit board pass through the column. The filler fills the deformation cavity and encloses the circuit board. The bottom sealing plate closes the opening of the deformation cavity. In the above patent, the connecting column and its radially protruding flange are integrally formed. In manufacturing, this integral forming increases processing difficulty and production cost, and the fixed height of the connecting column makes it unsuitable for all operating heights. Utility Model Content

[0004] I. Technical problems to be solved

[0005] This invention addresses the aforementioned deficiencies in the existing technology by proposing a strain gauge narrow strip sensor to solve the problems mentioned in the background section.

[0006] II. Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides a strain gauge narrow strip sensor, including a force transmission device. The force transmission device includes an elastic plate and a force transmission column disposed in the middle of the elastic plate. The bottom end of the elastic plate is recessed upward to form a receiving groove. The force transmission column is cylindrical and its top end extends upward to a height higher than the top surface of the elastic plate. A strain zone is provided in the receiving groove. At least two strain gauges are attached to the strain zone and are electrically connected to each other.

[0008] A force-bearing plate, the bottom end of which is fixedly connected to the top end of the force-transmitting column.

[0009] In the above technical solution, a screw hole is provided at the center of the force-bearing plate, and the top of the force-transmitting column is recessed downward to form a screw groove that cooperates with the screw hole.

[0010] In the above technical solution, the bottom end of the force-bearing plate is connected to the top end of the force-transmitting column by welding.

[0011] In the above technical solution, the accommodating grooves are spaced at the bottom end of the elastic plate and increase in size as the elastic plate grows.

[0012] In the above technical solution, an electrical cable channel is provided between the receiving grooves, and the electrical cable channel is used to place the electrical cables for electrical connection between the strain gauges.

[0013] III. Beneficial Effects

[0014] Compared with the prior art, the present invention has the following advantages: The present invention separates the force plate and the force transmission column, which reduces the manufacturing difficulty and cost of the strain gauge narrow strip sensor. At the same time, the force transmission column extending above the top of the elastic plate can increase or decrease the height of the strain gauge narrow strip sensor by increasing or cutting the force transmission column according to the height requirements when the strain gauge narrow strip sensor is used. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 3 This is a circuit connection diagram of the present invention.

[0018] In the diagram: 1 is the force transmission device, 10 is the elastic plate, 11 is the force transmission column, 100 is the receiving groove, 101 is the strain zone, 102 is the strain gauge, 103 is the wire channel, 104 is the wire, 110 is the screw groove, 2 is the force plate, and 20 is the screw hole. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0020] Please see Figure 1-3This utility model provides a strain gauge narrow strip sensor, including a force transmission device 1. The force transmission device 1 includes an elastic plate 10 and a force transmission column 11 disposed in the middle of the elastic plate 10. The bottom end of the elastic plate 10 is recessed upward to form a receiving groove 100. The force transmission column 11 is cylindrical and its top end extends upward to a height higher than the top surface of the elastic plate 10. A strain zone 101 is provided in the receiving groove 100. At least two strain gauges 102 are attached to the strain zone 101 and are electrically connected to each other.

[0021] Force-bearing plate 2, the bottom end of which is fixedly connected to the top end of force-transmitting column 11.

[0022] In the above structure, the bottom end of the force plate is fixedly mounted on the top of the cylindrical force transmission column. The separate force plate and force transmission device reduce the manufacturing difficulty and cost of the strain gauge narrow strip sensor during the production process. The cylindrical force transmission column allows the force transmitted from the force plate to be more concentrated. At the same time, the top of the force transmission column extends upwards above the top of the elastic plate. When the overall height of the strain gauge narrow strip sensor needs to be increased, the force transmission column can be heightened by welding to the top of the force transmission column, and then the force plate can be installed on the heightened force transmission column to increase the overall height of the strain gauge narrow strip sensor. When the overall height of the strain gauge narrow strip sensor needs to be reduced, the height of the force transmission column can be reduced by cutting off the part of the force transmission column above the top of the elastic plate, and then the force plate can be installed on the cut-off force transmission column to reduce the overall height of the strain gauge narrow strip sensor. The above scheme allows the uniformly processed strain gauge narrow strip sensor to be adapted to the usage environment with different height requirements, increasing the application range of the strain gauge narrow strip sensor.

[0023] Specifically, a screw hole 20 is provided at the center of the force plate 2, and the top of the force transmission column 11 is recessed downward to form a screw groove 110 that cooperates with the screw hole 20. Users can fix the force plate to the force transmission column by passing a screw through the screw hole and screwing it into the screw groove. The fixing and installation method of using screws in conjunction with screw holes and screw grooves can reduce the assembly difficulty when assembling strain gauge narrow strip sensors, and can be disassembled or installed multiple times.

[0024] Specifically, the bottom end of the load-bearing plate 2 is connected to the top end of the force transmission column 11 by welding. Welding can eliminate the gap between the load-bearing plate and the force transmission column, making them completely fused together and thus improving the integrity of the structure.

[0025] Specifically, the receiving grooves 100 are spaced apart at the bottom end of the elastic plate 10 and increase in number as the elastic plate 10 grows, so that the strain gauge narrow strip sensor can be designed to be longer or shorter, making it adaptable to more usage environments.

[0026] Specifically, an electrical cable channel 103 is provided between the receiving grooves 100. The electrical cable channel 103 is used to place the wires used for electrical connection between the strain gauges 102. Opening the electrical cable channel can accommodate the wires 104 connecting the strain gauges, making it more aesthetically pleasing and neat. At the same time, the electrical cable channel can also protect the wires from being damaged by collisions and squeezing.

Claims

1. A strain gauge narrow strip sensor, characterized in that, include: A force transmission device (1) includes an elastic plate (10) and a force transmission column (11) disposed in the middle of the elastic plate (10). The bottom end of the elastic plate (10) is recessed upward to form a receiving groove (100). The force transmission column (11) is cylindrical and its top end extends upward to a height above the top surface of the elastic plate (10). A strain zone (101) is provided in the receiving groove (100). At least two strain gauges (102) are attached to the strain zone (101) and are electrically connected to each other. The bottom end of the force-bearing plate (2) is fixedly connected to the top end of the force-transmitting column (11).

2. The strain gauge narrow strip sensor as described in claim 1, characterized in that: The force-bearing plate (2) has a screw hole (20) at its center, and the top of the force transmission column (11) is recessed downward to form a screw groove (110) that works in conjunction with the screw hole (20).

3. A strain gauge narrow strip sensor as described in claim 1, characterized in that: The bottom end of the force-bearing plate (2) is connected to the top end of the force transmission column (11) by welding.

4. A strain gauge narrow strip sensor as described in claim 1, characterized in that: The receiving grooves (100) are spaced apart at the bottom end of the elastic plate (10) and increase in number as the elastic plate (10) grows.

5. A strain gauge narrow strip sensor as described in claim 4, characterized in that: A wire channel (103) is provided between the receiving grooves (100), and the wire channel (103) is used to place wires (104) for electrical connection between the strain gauges (102).

Images