Rapid detection method for automobile passage circle with pressure-regulating liquid spraying device

Abstract

The invention relates to an automobile passage circle rapid detection method with a pressure regulating liquid spraying device. The method comprises the steps of preparation before detection, field actual measurement and data analysis. During preparation before measurement, a pressure regulating liquid spraying device is installed, and measuring points are preset according to the structure of a detected vehicle (21) and a right triangle: a rear axle center outer measuring point A (13), an outermost side front measuring point B (14) and a rear axle center inner measuring point C (15). The pressure regulating liquid spraying device is provided with a first pump (3), a second pump (4) and a pressure regulating valve (8), the inner diameter of a spraying pipe (9) is a high duralumin pipe of 10+ / - 0.5 mm, and the diameter of a nozzle (10) is 3 + / - 0.2 mm. During field actual measurement, the detected vehicle (21) is positioned and arranged, the liquid spraying device is started, liquid issprayed at a low position to form a track, and data are measured according to preset measuring points. During data analysis, the turning radius of the front point of the outer side of the detected vehicle (21) is calculated through right-angled triangle layout, and the vehicle channel circle trafficability of the detected vehicle (21) is judged. The method has the advantages of being simple, convenient to operate, good in repeatability of the detection process and wide in detected vehicle types.

Description

technical field [0001] The invention relates to a rapid detection method for vehicle passage circles with a pressure regulating liquid spraying device used in the technical field of vehicle detection. Background technique [0002] Chinese patent application CN106969923A discloses a vehicle channel circular track testing system and method, and Chinese utility model patent approval CN206832478U discloses a vehicle channel circular track testing system, or uses the ground concentric circle method to judge whether the vehicle under inspection exceeds the channel line Vehicle curve passability, or use the field rotating column method to determine the vehicle curve passability by means of angle distance signal acquisition and trajectory data fitting. The detection and operation defects are: limited space, large error, and too long time , low efficiency, poor test repeatability, high safety risk, difficult to grasp the position of the concentric circle, difficult to control the ins...

AI Technical Summary

Problems solved by technology

[0002] Chinese patent application CN106969923A discloses a vehicle channel circular track testing system and method, and Chinese utility model patent approval CN206832478U discloses a vehicle channel circular track testing system, or uses the ground concentric circle method to judge whether the vehicle under inspection exceeds the channel line Vehicle curve passability, or use the field rotating column method to determine the vehicle curve passability by means of angle distance signal acquisition and trajectory data fitting. The detection and operation defects are: limited space, large error, and too long time , low efficiency, poor test repeatability, high safety risk, difficult to grasp the position of the concentric circle, difficult to control the inspected vehicle, difficult to install and debug the detection device, and high maintenance cost of the detection site

[0003] In the existing technology, on the one hand, the normal-pressure liquid spray trajectory device for vehicle passage circle detection is not conducive to the continuous display and shape maintenance of the trajectory, which brings interference to subsequent parameter measurement

On the other hand, the vehicle under inspection needs to drive dynamically during the detection of the vehicle passage circle, which virtually increases the safety risk and expands the detection error

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