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Wind tunnel test and evaluation method for vehicle side window rainwater visual field management performance

A technology of wind tunnel test and evaluation method, which is applied in aerodynamic test, machine/structural component test, measurement device, etc., can solve the problems of less vehicle side window rainwater vision management performance test and evaluation method, vehicle safety hidden danger and other problems , to achieve the effect of convenient use, improved performance and high repeatability

Active Publication Date: 2021-02-26
CATARC TIANJIN AUTOMOTIVE ENG RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are few relevant test and evaluation methods for the management performance of the rainwater field of view of the side windows of automobiles in China at present, which leads to major safety hazards when the vehicle is driving in rainy days.

Method used

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  • Wind tunnel test and evaluation method for vehicle side window rainwater visual field management performance
  • Wind tunnel test and evaluation method for vehicle side window rainwater visual field management performance
  • Wind tunnel test and evaluation method for vehicle side window rainwater visual field management performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Take one test vehicle 1 to carry out the following test and evaluate the rainwater vision management performance of its side window 11, including the following steps:

[0074] S1: Outline the range of the main viewing area 111 inside the main driver's side window 11 of the test vehicle 1. The range of the main viewing area 111 is the collection of the ranges of the left and right eyes viewing the rearview mirror from the driver's position during car design;

[0075] S2: Draw a square grid 4 inside the driver's side window 11 of the test vehicle 1;

[0076] S3: Fix the background board 3 on the outer side of the main driver of the car, the horizontal distance between the top of the background board 3 and the wind tunnel nozzle 2 is 1.75m, and ensure that the field of view of the side window 11 of the main driver is completely covered by the background board 3;

[0077] S4: Mount the camera on the passenger side of the vehicle, aim the lens at the driver's side window 11 ...

Embodiment 2

[0092] Get 1 test vehicle 2 to carry out the following test and evaluate its side window 11 rainwater field of view management performance. The test steps and parameters are exactly the same as in Example 1. According to the test results, the vehicle side window 11 rainwater field of view management performance is carried out according to the following method evaluate:

[0093] First, the subjective evaluation method is used to evaluate the rainwater visual field management performance of the vehicle side window 11: according to the test results, after the test, the side window 11 field of view of the test vehicle 1 is relatively clear, and the subjective score is 6.5 points. Window 11 has good rainwater vision management performance.

[0094] Then use the objective evaluation method to evaluate the management performance of the vehicle side window 11 rainwater visual field: according to the test results, the ratio of the total number of polluted grids in the main visual field...

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Abstract

The invention provides a wind tunnel test method for vehicle side window rainwater visual field management performance. The wind tunnel test method comprises the following steps of: S1, drawing a square grid in a main driving side window of a test vehicle; S2, fixing the test vehicle on a wind tunnel plenum rotating hub dynamometer; S3, calibrating rainfall equipment in the wind tunnel according to the rainfall required by the test; S4, opening the rainfall equipment in the wind tunnel, and setting the flow of the rainfall equipment; and S5, starting a fan in the wind tunnel to a designated wind speed, after the wind speed is stable, starting a windshield wiper to the maximum hanging frequency, stopping the windshield wiper after t seconds, and meanwhile stopping the fan. According to thewind tunnel test and evaluation method for the vehicle side window rainwater visual field management performance, the environment wind tunnel is used for testing the vehicle side window rainwater management performance, the repeatability is high, the rainfall can be independently adjusted, the test result can be used for evaluating the vehicle rainwater management performance and optimizing the vehicle shape, and the method has important significance on the rainwater development of the automobile side window.

Description

technical field [0001] The invention belongs to the technical field of automobile testing, and in particular relates to a wind tunnel test and evaluation method for the management performance of rainwater field of view of vehicle side windows. Background technique [0002] When driving in bad weather such as rainy days, rainwater stays on the windows, forming water stains in the form of dots and flakes, which distorts the driver's line of sight and reduces the clarity of vision, thus posing a major hidden danger to safe driving. In European and American countries, quite stringent requirements are put forward for the visibility management of the side windows of cars in rainy weather, and the rainwater management capability is regarded as an important part of car safety performance. [0003] When driving in rainy days, the movement of rainwater on the front windshield is forcibly affected by the wipers, while the side windows are not equipped with external rainwater removal eq...

Claims

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Application Information

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IPC IPC(8): G01M9/02G01M9/06
CPCG01M9/02G01M9/06G01M9/067Y02A90/10
Inventor 王利利刘学龙秦青张扬郝剑虹王海洋李景王执涛徐辰
Owner CATARC TIANJIN AUTOMOTIVE ENG RES INST CO LTD
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