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Automobile running recorder

A technology of driving recorder and automobile, which is applied in the direction of instruments, wheel testing, vehicle parts, etc., and can solve the problems of not reflecting the driving condition of the car, high price, wheel lock, etc.

Inactive Publication Date: 2005-05-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, since most domestic cars are not equipped with anti-lock braking systems (ABS), the wheels sometimes lock up during emergency braking, and the sliding speed of the car is much higher than the speed of the wheel rotation (such as figure 1 The vehicle body speed and wheel speed in the vehicle), the wheel speed cannot reflect the real driving condition of the car at this time, it is necessary to measure and record the real-time vehicle speed
Traditionally, there are mainly wheel speed measuring instruments such as five-wheel meter and non-contact five-wheel meter, which are only suitable for measuring wheel speed, and are not suitable for real-time measurement of vehicle speed during emergency braking, so they cannot truly reflect the driving speed of the car , and the price is higher

Method used

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Embodiment Construction

[0013] What this embodiment adopts is the ADXL05 miniature force balance type acceleration sensor of American Analog Devices (AD), which integrates a complete acceleration sensor and signal conditioning amplifier inside. Only a few external resistors and capacitors are needed to realize acceleration measurement and signal adjustment and amplification. It can be conveniently installed on the car seat for acceleration measurement in different directions.

[0014] It works as figure 2 Shown:

[0015] In the ADXL05 integrated acceleration sensor, a movable center electrode is placed between multiple fixed electrodes. The center electrode is fixed on the inertial mass. When the inertial mass is at rest, the center electrode remains at the center of the left and right fixed electrodes. When there is acceleration , the inertial mass drives the center electrode to move under the action of acceleration, so that the center electrode is different from the left and right fixed gaps, so...

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Abstract

The automobile running recorder features the increased acceleration sensor on the basis of traditional automobile running recorder. The measurement and record system is one Flash-type 8 bit monochip computer, and the speed values in different time while straight line brake is calculated in trapezium formula. The recorder is easy to calibrate, low in cost and simple in powering.

Description

technical field [0001] The invention relates to a vehicle driving recorder, which relates to a vehicle driving recording device, in particular to the technical field of measuring vehicle driving speed. Background technique [0002] At present, most of the automobile driving recorders used in China use wheel speed sensors to record the vehicle speed curve in the braking process (such as figure 1 shown). In fact, since most domestic cars are not equipped with anti-lock braking systems (ABS), the wheels sometimes lock up during emergency braking, and the sliding speed of the car is much higher than the speed of the wheel rotation (such as figure 1 The vehicle body speed and wheel speed in the vehicle), the wheel speed cannot reflect the real driving condition of the car at this time, it is necessary to measure and record the real-time vehicle speed. Traditionally, there are mainly wheel speed measuring instruments such as five-wheel meter and non-contact five-wheel meter, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R16/02G01M17/013G01P7/00
Inventor 许沧粟于洪波
Owner ZHEJIANG UNIV