Vehicle body position detection method for washing vehicles

Abstract

The present invention provides a vehicle body position detection method for washing vehicles. The vehicle body position detection method comprises the following steps: a measurer (1) measures the height of a vehicle body, a detector (3) measures the position of a tire (71), the contour line of the vehicle body is measured through an image processor, the measurer (1) and the detector (3) are connected with the image processor through a line and an electrical control module (4), the measurer (1), the detector (3) and a camera (2) in the image processor are fixed on a frame body (5), the frame body (5) is arranged on a vehicle washing frame (8) and can move back and forth by means of a driving mechanism, and the driving mechanism is connected with the electrical control module (4). The vehicle body position detection method for washing vehicles can measure the position values of the projecting portions such as retroreflectors, a baggage holder and the like on the vehicle body contour, and the measurement is rapidly performed in a non-contact and automation mode. Besides, the vehicle body position detection method for washing vehicles measures the tire orientation and the wheelbase so as to perform special cleaning of tires, determine the head and tail and in-out position condition of the vehicle and assist to determine the type of the vehicle.

Description

technical field [0001] The invention relates to the field of car washing, in particular to a method for detecting the position of a car body 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 b...

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

Images