A System for Measuring the Initial Velocity of Automobile Braking

A braking initial speed, vehicle braking technology, applied in the direction of braking safety system, etc., can solve the problems of inability to directly record the initial braking speed, no way to measure the braking distance, misjudgment by the party responsible for the accident, etc. Compensate for low precision, high accuracy, and the effect of promoting development

Inactive Publication Date: 2017-01-04
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The braking distance in this formula is the estimated value of the braking trace left by the on-site braking. The disadvantage is that there is a large subjective error, and there may even be mistakes, resulting in misjudgment by the party responsible for the accident.
The above methods cannot directly record the initial braking speed at that time, let alone measure the precise braking distance

Method used

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  • A System for Measuring the Initial Velocity of Automobile Braking
  • A System for Measuring the Initial Velocity of Automobile Braking
  • A System for Measuring the Initial Velocity of Automobile Braking

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Experimental program
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Embodiment Construction

[0016] 1. Left front brake; 2. Brake combination valve; 3. Right front brake; 4. Brake master cylinder; 5. Vacuum booster; 6. Brake pedal; 7. Brake; 8. MCU; 9. A / D conversion ; 10, amplifier; 11, pressure sensor.

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Such as figure 1 The system for measuring the initial speed of automobile braking described in the present invention includes: pressure sensor, amplifier, A / D conversion, MCU. The specific working process of this system is as follows: when the driver stepped on the brake pedal 6, the vacuum booster With the help of 5, the braking force is amplified, the brake fluid in the brake master cylinder 4 flows into the brake combination valve 2 under the action of a certain pressure, the valve of the brake combination valve 2 is opened, and the brake fluid passes through the brake pipeline Acting on the brake, a pressure sensor 11 is arranged on the hydrauli...

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Abstract

A system for measuring the initial speed of automobile braking, which belongs to the field of automobile braking. The pressure sensor senses the real-time pressure, and then transmits the sensed real-time pressure to the amplifier. After the amplification of the amplifier, the voltage is simulated by the A / D converter. The signal is converted into a digital signal and input to the MCU. The MCU compares the input real-time pressure with the preset maximum pressure. If the input real-time pressure is greater than or equal to the maximum pressure, the timing module starts timing; if the input real-time pressure is less than the maximum pressure Pressure, the timing module stops working; and record the duration, and then input the recorded time into the calculation module; according to the calculation formula of the calculation module, it will be substituted, and the initial braking speed will be solved, and the result will be stored.

Description

technical field [0001] The invention relates to a system for measuring the initial braking speed of an automobile, which belongs to the field of automobile braking. Background technique [0002] The braking performance of a car is one of the main performances of a car. Braking performance is directly related to traffic safety. Major traffic accidents are often related to situations such as too long braking distance and sideslip during emergency braking. Therefore, automobile braking performance is an important guarantee for safe driving of automobiles. At present, in traffic accidents, it is necessary to measure the braking distance to estimate the initial braking speed and then determine the party responsible for the accident. There are the following basic formulas: [0003] Brake print formula with zero final speed: [0004] [0005] The final speed is not zero brake mark formula: [0006] [0007] is the initial braking velocity, is the friction coefficient ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T17/22
Inventor 石沛林李朋超张橹
Owner SHANDONG UNIV OF TECH
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