Transmission electronic odometer speed-measuring system and method

An odometer and transmission technology, which is applied to instruments, measuring devices, measuring distances, etc., can solve problems such as large deviation, achieve high precision, improve anti-interference, and reduce volume and cost.

Inactive Publication Date: 2010-05-26
QIJIANG GEAR TRANSMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0014] Aiming at the defects and deficiencies in the prior art, the purpose of the present invention is to propose a transmission electronic odometer speed measurement system capable of accurately measuring the rotational speed, which can overcome the increasing deviation caused by the defect of the pulse signal generating module in the prior art. Larger problems, and the advantage of having direct calculations for different impulse signals

Method used

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  • Transmission electronic odometer speed-measuring system and method
  • Transmission electronic odometer speed-measuring system and method
  • Transmission electronic odometer speed-measuring system and method

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Embodiment Construction

[0057] see figure 1 , Transmission electronic odometer speed measurement system, one end of the flexible shaft is connected with the transmission gear, and the sensor is used to sense the rotation of the flexible shaft and send out a pulse signal (the flexible shaft and the sensor are not shown in the figure). The electronic control module U1 is used to receive the pulse signal sent by the above-mentioned sensors, and the electronic control module U1 adopts the Atmega16L single-chip microcomputer of Atmel Company. The electric control module sets the pulse signal acquisition time by the first timer T1 inside it, and the electric control module calculates the interval time of all pulse signals within the validity period of the first timer, according to the preset ratio, the longest and the shortest Part of the time interval is deleted, the remaining time interval is calculated as an average time interval, and the speed or mileage is calculated according to the average time inte...

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Abstract

The invention proposes a transmission electronic odometer speed measuring system and method, and it is for speed measuring error caused by the transmission electronic odometer having error in the existing technologies, providing a transmission electronic odometer speed measuring system, including: the electronic control module, and the electronic control module is used for receiving the pulse signal issued by the said sensor, and with its internal first timer to set the pulse signal acquisition time. Also it provides a speed measuring method, including: statistic the interval between each twoadjacent pulse signals received by the electric control module during the available time of the first timer; sorting the above intervals, and in accordance with the predetermined ratio, deleting the maximum and minimum; computing the remaining intervals to obtain an average value, and using the average interval to calculate the rotating speed. The invention can accurately measure the rotating speed, and solve the problem that the transmission electronic odometer can not be quantitative evaluated.

Description

technical field [0001] The invention relates to a transmission electronic odometer and a speed measurement method thereof, in particular to a transmission electronic odometer speed measurement system and a speed measurement method. Background technique [0002] The traditional speed odometer is mechanical. A typical mechanical odometer is connected to a flexible shaft. There is a steel cable inside the flexible shaft. The other end of the flexible shaft is connected to a certain gear of the transmission. The rotation of the gear drives the rotation of the steel cable. The cable drives a magnet in the cover ring of the odometer to rotate. The cover ring is connected with the pointer and the pointer is placed at zero through the hairspring. The speed of the magnet rotation causes the change of the size of the magnetic force line, and the balance is broken, so the pointer is driven. This speed odometer is simple and practical, and is widely used in large and small cars. Howeve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C23/00G01C22/00G01C22/02G01P3/64G01P3/66
Inventor 罗光涛王占鑫
Owner QIJIANG GEAR TRANSMISSION
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