Strain type narrow strip weighing sensor for road

Abstract

The utility model discloses a strain type narrow strip weighing sensor for a road, which comprises an elastic body, the elastic body comprises a stress plate, a force transmission column vertically connected to the lower end of the stress plate and an elastic plate arranged at one end of the force transmission column, the force transmission column is arranged at the center position of the elastic plate, and the elastic plate is arranged at the other end of the force transmission column. The two ends of the elastic plate extend downwards to form supporting parts, a containing groove is formed between the supporting parts, at least two strain areas are arranged in the containing groove, at least two strain gauges are attached to the strain areas, and the strain gauges are electrically connected through a cable to form a measuring circuit. According to the utility model, the measurement position of the strain gauge is changed from the force transmission column to the strain area arranged in the accommodating groove, so that a more accurate measurement effect is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a highway weighing technical field, concretely relates to a strain type narrow strip weighing sensor for highway. BACKGROUND

[0002] The detection of vehicle overload is extremely important, and the weight information of the passing vehicle is monitored and recorded in real time, so that the weight of the object in the dynamic state is captured and measured in real time by installing a sensor in a narrow area, and a narrow strip type weighing sensor with high precision, high speed and high stability gradually arises.

[0003] Most of the narrow strip type weighing sensors on the market are to detect the force on the force transmission column by attaching strain gauges to the force transmission column, but the measurement result is low in accuracy.

[0004] Based on the above reasons, it is necessary to improve the existing technology. INVENTION CONTENTS

[0005] I. Technical problems to be solved

[0006] The utility model is in view of the above-mentioned defects existing in the prior art, and a strain type narrow strip weighing sensor for highway is provided to solve the problems in the above background technology.

[0007] II. Technical scheme

[0008] To solve the above technical problems, the utility model provides a strain type narrow strip weighing sensor for highway, which comprises an elastic body, the elastic body comprises a stress plate, a force transmission column vertically connected to the lower end of the stress plate and an elastic plate arranged at one end of the force transmission column, the force transmission column is arranged at the center position of the elastic plate, the elastic plate extends downward at both ends to form a support part, a containing groove is formed between the support parts, at least two strain areas are arranged in the containing groove, at least two strain gauges are attached in the strain areas, and the strain gauges are electrically connected to form a measurement circuit through a cable.

[0009] In the above technical scheme, the stress plate, the force transmission column and the elastic plate are integrally formed.

[0010] In the above technical scheme, isolation layers are arranged at both ends of the elastic body, and a protective plate with the same size as the isolation layer is arranged outside the isolation layer.

[0011] In the above technical scheme, the top of the isolation layer is higher than the stress plate to form a groove part, and wear-resistant glue is uniformly laid in the groove part.

[0012] In the above technical scheme, a polishing layer is formed on the surface of the wear-resistant glue by polishing.

[0013] In the technical scheme, the gap is uniformly filled with sealant between the isolation layer and the force transmission column.

[0014] In the technical scheme, the gap between the seal plate and the accommodating groove is filled with sealant.

[0015] III. Advantages

[0016] Compared with the prior art, the utility model has the advantages that: the utility model changes the measurement position of the strain gauge from the force transmission column to the strain area arranged in the accommodating groove, so that more accurate measurement effect is realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective structural schematic view of the utility model.

[0018] Figure 2 It is a perspective structural schematic view of the utility model.

[0019] Figure 3 It is a sectional structural schematic view of the utility model.

[0020] Figure 4 It is a circuit connection schematic view of the utility model.

[0021] In the drawing: 1 is an elastic body, 10 is an isolation layer, 11 is a guard plate, 100 is a groove part, 101 is wear-resistant glue, 102 is sealant, 2 is a stress plate, 3 is a force transmission column, 4 is an elastic plate, 40 is a support part, 41 is an accommodating groove, 42 is a strain area, 43 is a strain gauge, 410 is a seal plate, and 5 is a cable. DETAILED DESCRIPTION

[0022] The specific implementation of the utility model will be described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0023] Please refer to Figures 1-4 The utility model provides a kind of strain type narrow strip weighing sensor for highway, including elastic body 1, the elastic body 1 includes stress plate 2, vertical connection in the lower end of the stress plate force transmission column 3 and the elastic plate 4 being arranged in the force transmission column 3 one end, the force transmission column 3 is arranged in the elastic plate 4 center position, the elastic plate 4 both ends extend downward and form support part 40, the support part 40 between formation accommodating groove 41, at least two strain areas 42 are arranged in the accommodating groove 41, at least two strain gauges 43 are attached in the strain area 42, the strain gauge 43 is electrically connected by cable 5 between formation measurement circuit.

[0024] In the above structure, cable is connected byFigure 4 The strain gauge is connected to the measuring circuit in a connecting mode, when the vehicle is pressed on the force receiving plate, the force receiving plate bears the same pressure as the weight of the vehicle, and the force receiving plate transmits the pressure to the middle part of the elastic plate through the force transmission column, the middle part of the elastic plate starts to deform and bend downward after receiving the pressure transmitted by the force transmission column, and the accommodating groove recessed in the middle part of the elastic plate deforms at the same time, the strain area is arranged at the deformation position in the accommodating groove, so that the strain gauge in the strain area also deforms, the strain gauge deforms and stretches under the action of external force, so that the internal resistance value of the strain gauge increases, and then the change of the resistance value is detected by the measuring circuit and is converted into a measurable electric signal.

[0025] When the vehicle is no longer pressed on the force receiving plate, the force receiving plate no longer transmits pressure downward through the force transmission column, the elastic plate resets the accommodating groove at the lower end, and the strain gauge resets to restore the internal resistance value to the original value, and the overall structure changes the measurement position of the strain gauge to the strain area arranged in the accommodating groove, thereby realizing more accurate measurement effect.

[0026] Specifically, the force receiving plate 2, the force transmission column 3 and the elastic plate 4 are integrally formed, the integral forming integrates the force receiving plate, the force transmission column and the elastic plate into one whole, reduces the connecting points between the parts, reduces the risk of loosening and damage caused by improper connection or long-term use, so that the overall structure is more solid and durable, and can withstand greater external force and pressure.

[0027] Specifically, the elastic body 1 is provided with an isolation layer 10 at both ends, and the isolation layer 10 is provided with a guard plate 11 with the same size as the isolation layer 10 outside. The guard plate arranged outside the isolation layer can improve the protection of the isolation layer and prevent the isolation layer from being bumped.

[0028] Specifically, the top of the isolation layer 10 is higher than the force receiving plate 2 to form a groove part 100, and wear-resistant glue 101 is uniformly laid in the groove part 100. The groove part can limit and accommodate the wear-resistant glue, facilitating the laying of the wear-resistant glue.

[0029] Specifically, the surface of the wear-resistant glue 101 is formed into a polishing layer by polishing. Polishing the surface of the wear-resistant glue into a smooth polishing layer can prevent the occurrence of additional friction and resistance due to the uneven surface of the wear-resistant glue, which affects the measurement of the sensor and causes errors.

[0030] Specifically, a gap is formed between the isolation layer 10 and the force transmission column 3, and the gap is uniformly filled with sealant 102. Uniformly filling the gap with sealant can effectively prevent dust, moisture and other impurities from entering the interior, thereby effectively protecting the internal force transmission column from damage and significantly improving the accuracy of the weighing sensor.

[0031] Specifically, the accommodating groove 41 is provided with a sealing plate 410 at an opening thereof, and a gap between the sealing plate 410 and the accommodating groove 41 is filled with sealing glue 102, so that the sealing plate is prevented from being at the bottom of the accommodating groove, and the strain gauge is more easily sealed, and the sealing glue can prevent external dust, moisture and other impurities from invading the internal strain gauge, so that the strain gauge is not damaged.

[0032] The above is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A strain gauge load cell for highway use, characterized in that, The utility model relates to a kind of elastic body (1), the elastic body (1) includes force plate (2), force transmission column (3) being connected vertically in the lower end of the force plate and elastic plate (4) being arranged in one end of the force transmission column (3), the force transmission column (3) is arranged in the central position of the elastic plate (4), the elastic plate (4) both ends extend downward and form support part (40), accommodating groove (41) is formed between the support part (40), at least two strain areas (42) are arranged in the accommodating groove (41), at least two strain gauges (43) are attached in the strain area (42), and the strain gauge (43) is electrically connected by cable (5) between the strain gauge (43) and forms measurement circuit. The force plate (2), the force transmission column (3) and the elastic plate (4) are integrally formed.

2. A strain gauge load bar for use in highway weighing applications as claimed in claim 1 wherein: The elastic body (1) is provided with an isolation layer (10) at both ends, and the outer side of the isolation layer (10) is provided with a guard plate (11) which is the same size as the isolation layer (10).

3. The strain gauge narrow strip weighing sensor for highways as described in claim 1, characterized in that: The top of the isolation layer (10) is higher than the force plate (2) to form a groove (100), and the groove (100) is uniformly paved with wear-resistant glue (101).

4. A strain gauge load bar for use in highway weighing applications as claimed in claim 3 wherein: The surface of the wear-resistant glue (101) is formed into a polishing layer by polishing.

5. A strain gauge load bar for use in highway weighing applications as claimed in claim 4 wherein: The isolation layer (10) and the force transmission column (3) form a gap, and the gap is uniformly filled with sealant (102).

6. A strain gauge load bar for highway weighing scales as claimed in claim 3 wherein: the load bar is formed from a single piece of material. The accommodating groove (41) is provided with a sealing plate (410) at the opening, and the gap between the sealing plate (410) and the accommodating groove (41) is filled with sealant (102).

7. A strain gauge load bar for highway weighing scales as defined in claim 1 wherein: the load bar is formed of a single piece of material. ​

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