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

A technology of spraying device and vehicle channel, applied in vehicle testing, measuring device, testing of machine/structural components, etc., can solve problems such as continuous appearance of unfavorable trajectories and shape retention, poor test repeatability, and increased safety risks, etc. Achieve the effect of avoiding fluctuations in detection parameters, accurate and reliable detection data, and avoiding site interference.

Active Publication Date: 2021-03-26
XIANGYANG DAAN AUTOMOBILE TEST CENT
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  • Abstract
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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

Method used

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Embodiment Construction

[0014] The present invention will be further described below according to the embodiments provided by the accompanying drawings.

[0015] The first part, detection principle.

[0016] Pre-test preparation stage: when the car is turning, the axes of all the wheels intersect at one point, and all the wheels move around a common center of circle, which is called the steering center O point 16 of the car. This steering center O point 16 is the intersection of the radial straight line passing through the center of the front outer wheel and the front inner wheel of the vehicle and perpendicular to the plane of the front wheel and the extension line passing through the axis of the rear axle of the vehicle. When the vehicle is turning around the turning center O point 16, all points on the vehicle perform circular motion around the turning center O point 16, because the turning center O point 16 is on the extension line of the rear axle axis of the vehicle, and the rear axle axis is p...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 吴笛黄柏杨赵俊杰赵伟刘福坤
Owner XIANGYANG DAAN AUTOMOBILE TEST CENT
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