Body position detection device for car washing

Abstract

The invention relates to a car body position detection device for car washing, which comprises a measuring device 1, a detector 3, an image processor and an electrical control module 4, and is characterized in that the measuring device 1, the detector 3 and the image processor are connected with the electrical control module 4 through lines, the measuring device 1, the detector 3 and cameras 2 in the image processor are fixed on a frame body 5, the frame body can be placed on a car washing frame 8 in a back-and-forth moving manner through a driving mechanism, and the driving mechanism 8 is connected with the electrical control module 4; the measuring device 1 comprises a transmitter 11 and a receiver 12, the image processor comprises the cameras 2 and an image recognition and operation module, the cameras 2 are fixed at the upper parts of the frame body 5 and located at two sides above an automobile 7. The advantages lie in that position values of protruding parts such as reflectors and a luggage rack on the car body contour can be measured, and measurement is performed quickly in a non-contact and automated manner; and meanwhile, the tire azimuth and the wheelbase are measured, special cleaning can be performed on tires accordingly, the head, the tail and inlet and outlet conditions of the automobile are judged, and model judgment is assisted.

Description

technical field [0001] The invention relates to the field of car washing, in particular to a vehicle body position detection device for car washing. Background technique [0002] When developing a computerized car washing machine, it is necessary to measure some dimensions of the car to be washed, so that the working mechanism such as the high-pressure water nozzle and the car body can maintain a suitable distance. However, how to accurately know and determine the geometric dimensions and position parameters of objects such as reflectors and roof racks is a technical problem that has not been well resolved in the industry for a long time. Due to the inaccurate position parameters and geometric dimension data, the cleaning equipment The cleaning effect is greatly reduced. In addition, for cleaning equipment, the measurement requirements of the body shape have its own particularity: not only the body contour is measured, but also the position information of the car body is me...

AI Technical Summary

Problems solved by technology

This invention mainly utilizes the principle of ultrasonic sensor echo position measurement to detect the target object and its orientation, and solves the problems of complex structure and high failure rate in conventional photoelectric sensor measurement methods.

However, it can be known from the principle of ultrasonic distance measurement that the sensor emits a cone-shaped beam, and what is detected is not the echo reflected by the specified measured point in the beam projection area, and the unit energy density decreases rapidly as the distance increases. , the ability to detect local protrusions on the surface of the vehicle body such as luggage racks and reflectors is weak and unstable, and the detection results cannot be used to accurately identify the geometric features of the contour line on the cross-section of the vehicle body; what's more, the calculated It is the distance between a reflection point and the sensor, and the distance between the reflection point and the vertical plane where the sensor is located cannot be obtained

Therefore, it has been proven from principle to practice that ultrasonic sensors are difficult to meet the precise measurement requirements of computerized car washing machines for keeping the car body close to work, and it is also impossible to detect the tire position and carry out targeted cleaning actions

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