CN101447130A - Highway transport vehicle unbalance-loading detecting device - Google Patents

Abstract

The invention relates to an off-load detection device for a road transport vehicle. It includes a semiconductor laser (7), a photoelectric potential sensor (6) and a reflector (4), and the semiconductor laser (7), a photoelectric potential sensor (6) and a reflector (4) are respectively installed on leaf springs on both sides of the axle (1) Outer side, wherein the semiconductor laser (7) and the photoelectric position sensitive sensor (6) are fixed side by side on the outer side of the middle position of the leaf spring (1), and the reflector (4) is fixed on the same side near the end of the leaf spring (1) The mirror surface of reflector (4) is facing the photosensitive surface of photoelectric potential sensitive sensor (6). The reflected light falls on the photosensitive surface of the photoelectric potential sensitive sensor (6). The device has a simple structure, can accurately judge the unbalanced load phenomenon of operating vehicles, and provides a necessary guarantee for the safe operation of road transport vehicles.

Description

A road transport vehicle eccentric load detection device

Technical field:

The invention relates to an eccentric load detection device for a road transport vehicle, which is mainly suitable for a road transport vehicle using a leaf spring as a suspension system, and belongs to the technical field of road transport vehicle safety detection.

Background technique:

The unbalanced load of road transport vehicles is an extremely important factor causing traffic safety accidents, especially in the case of high speed, emergency steering, etc., the unbalanced load of vehicles can easily cause rollover and cargo falling off, resulting in vicious traffic accidents. Existing road transport vehicle load measurement methods mainly involve the weighing of the vehicle axle load and the total vehicle weight, and rarely involve the unbalanced load of each axle of the vehicle, that is, the detection of the vehicle's unbalanced load.

Invention content:

The purpose of the present invention is to provide a road transport vehicle eccentric load detection device, which can judge the vehicle eccentric load by detecting the load difference on both sides of the vehicle bearing shaft, and reduce the probability of traffic safety accidents.

Above-mentioned purpose of the present invention is achieved in that, in conjunction with accompanying drawing, description is as follows:

A road transport vehicle eccentric load detection device, which includes a semiconductor laser 7, a photoelectric potential sensor 6 and a reflector 4, and the semiconductor laser 7, the photoelectric potential sensor 6 and the reflector 4 are respectively installed on the steel plates on both sides of the axle On the outside of the spring 1, the semiconductor laser 7 and the photoelectric potential sensor 6 are fixed side by side on the outside of the middle position of the leaf spring 1, and the reflector 4 is fixed on the same side near the end of the leaf spring 1, that is, on the lifting lug 2 or the spring support 9 The mirror surface of reflector 4 is facing the photosensitive surface of photoelectric potential sensitive sensor 6, and the line laser light emitted by semiconductor laser 7 when the vehicle is unloaded coincides with the photosensitive surface center of photoelectric potential sensitive sensor through reflector reflection, and the reflected light falls on the photoelectric potential when fully loaded. Sensitive sensor 6 photosensitive surface.

The semiconductor laser 7 and the photoelectric position sensitive sensor 6 are fixed in the middle box body 5, the reflector 4 is fixed in another box body 3, and the two box bodies 5, 3 are clamped and fixed by a clamp, and the two box bodies 5 , 3 The relative position in the horizontal direction can be adjusted, and its horizontal distance will be determined by the elastic coefficient of the spring.

For a car that independently uses leaf springs for one axle, the installation position of the box body 3 can be changed, and its specific position will be determined by the deformation of the leaf spring when the static axle load of the vehicle on the side where the device components are installed reaches the rated value. When the load is lower than 110% of the rated static axle load, the light emitted by the semiconductor laser will fall on the photosensitive surface of the photoelectric position sensitive sensor after being reflected by the reflector; and the car with two axles sharing the leaf spring, the installation position of the middle box body 5 can be Change, position change principle is consistent with the former.

When the vehicle is loaded, the leaf spring 1 is deformed due to the load, so that the main direction of the laser beam and the normal line of the reflector 4 present an included angle, thereby causing a certain deviation of the beam after being reflected by the mirror surface, so that the photoelectric potentiometer 6 is sensitive The position of the light spot on the surface changes. The offset is proportional to the angle of rotation. The deformation of the leaf spring 1 is related to the load weight and the running speed of the vehicle. When the vehicle is stationary or running at a certain speed, the deformation of the leaf spring 1 has a monotonous linear relationship with the load. If the load distribution of the vehicle is relatively uniform, the signals detected by the photoelectric position sensitive sensors 6 on both sides are basically the same; The difference will be further magnified. In case of special running conditions such as turbulence, due to the shock generated by the vibration, there will be a large difference in the load value signals detected by the sensors on both sides, but this difference is an instantaneous change, not a constant value. It will not be judged as partial load. Therefore, once the unbalanced load of the vehicle reaches or exceeds a certain value, the signals detected by the sensors on both sides are processed and compared, and the absolute value of the difference obtained will continue to be greater than or equal to a certain value, so that a conclusion can be drawn— - Offloaded vehicles.

Beneficial effects of the present invention: the device has the advantages of simple structure, convenient installation, good dynamic response, high measurement accuracy, stable long-term operation, etc., and has the function of self-calibration. Therefore, it can be widely used in the unbalanced load detection and monitoring of various road transport vehicles, and provides certain technical guarantee for the safe operation of road transport vehicles.

Description of drawings:

Fig. 1 is a schematic diagram 1 of installation of the present invention.

Figure 2 is a view from direction A.

Figure 3 is a view from direction B.

Fig. 4 is the installation diagram 2 of the present invention

In the figure: 1. Leaf spring 2. Lifting lug 3. Box body 4. Reflector 5. Intermediate box body 6. Photoelectric position sensitive sensor 7. Semiconductor laser 8. Lifting lug 9. Spring support 10. Spring support

Detailed ways:

The present invention will be described in further detail below in conjunction with the embodiment shown in accompanying drawing:

Refer to Figures 1 to 4: a road transport vehicle eccentric load detection device related to the present invention is especially suitable for road transport vehicles using leaf springs as the suspension system, including reflectors 4 installed on both sides of the same bearing shaft, photoelectric potential The sensitive sensor 6, the semiconductor laser 7, and the reflector 4 are placed in the box body 3, and the box body 3 is fixed on the outside of the leaf spring 1 near the end of the leaf spring 1 by corresponding clamps, such as the lifting lug 2 or the spring support 9. , the photoelectric position sensitive sensor 6 and the semiconductor laser 7 are horizontally fixed side by side in the middle box body 5, and the middle box body 5 is also fixed on the outside of the middle part of the leaf spring 1 by corresponding clamps. The reflector 4 and the photoelectric potentiometer 6 are located on the same side of the leaf spring 1, and both are either at a position close to the spring or at a position away from the spring at the same time; by adjusting the position of the box body 3 or the middle box body 5, it is ensured that the reflector 4 The mirror is aligned with the photosensitive surface of the photoelectric potential sensitive sensor 6, and when the vehicle is unloaded, the line laser light emitted by the semiconductor laser 7 is reflected by the mirror 4 and coincides with the center of the photosensitive surface of the photoelectric potential sensitive sensor 6. When the vehicle is fully loaded, the reflected light falls on the photoelectric surface. Position-sensitive sensor 6 is in the photosensitive surface.

When the vehicle is loaded, the leaf spring 1 is deformed due to the load, so that the positional relationship between the mirror 4 and the photoelectric potential sensor 6 changes, that is, the angle between the two surfaces changes, and the laser beam emitted by the semiconductor laser 7 passes through the reflection. The mirror 4 will generate a certain offset after the specular reflection, and the photoelectric potential sensitive sensor 6 will sense the vehicle load by detecting this offset. The photoelectric position sensitive sensors 6 installed on both sides of the same bearing shaft respectively detect two load signal values. If the two signal values are compared after processing and always maintain a constant large difference, it can be judged that the The vehicle is unbalanced.

Claims (2)

1, a kind of highway transport vehicle unbalance-loading detecting device, it comprises semiconductor laser (7), photopotential dependent sensor (6) and catoptron (4), be characterised in that described semiconductor laser (7), photopotential dependent sensor (6) and catoptron (4) are installed on vehicle bridge both sides leaf springs (1) outside respectively, semiconductor laser wherein (7) and photopotential dependent sensor (6) are fixed in the outside, leaf spring (1) centre position side by side, and catoptron (4) is fixed in the same side and closes near leaf spring (1) end; The minute surface of catoptron (4) is right against the light-sensitive surface of photopotential dependent sensor (6), the line laser of semiconductor laser (7) emission overlapped with photopotential dependent sensor light-sensitive surface center through mirror reflects when vehicle was unloaded, and the full load reflection ray drops in photopotential dependent sensor (6) light-sensitive surface.

2, a kind of highway transport vehicle unbalance-loading detecting device according to claim 1, it is characterized in that described semiconductor laser (7) and photopotential dependent sensor (6) are fixed in the middle box body (5), catoptron (4) is fixed in another box body (3), two box bodys (5,3) grip by anchor clamps, two box bodys (5,3) relative position in the horizontal direction can be regulated, and its horizontal range will be by the elasticity coefficient size decision of spring.

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