Gearbox rotating speed measuring method
A technology of speed measurement and gearbox, applied in speed/acceleration/shock measurement, linear/angular velocity measurement, measuring devices, etc., can solve problems such as poor high-speed performance and unguaranteed performance, achieve accurate measurement, eliminate interference, and improve real-time sexual effect
Active Publication Date: 2015-06-24
武汉理工通宇新源动力有限公司
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Problems solved by technology
The accuracy and stability of the frequency measurement and period measurement method are relatively high, but it cannot guarantee that the real-time performance can be improved under the premise of accuracy stability, while the measurement period method calculates the rotational speed by measuring the time interval between two adjacent pulses of the rotational speed signal. Its high-speed performance is not good
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[0038] The present invention will be further described below in conjunction with specific examples and accompanying drawings.
[0039] The invention provides a method for measuring the rotational speed of a gearbox, which comprises the following steps:
[0040] S1. Set the input shaft rotational speed measurement sensor on the toothed disc on any gear position x, sample the rotational speed with the sampling clock frequency Fclk, and measure the pulse period P of the rotational speed pulse 入 , and put it into the pulse period array; the pulse period P of the speed pulse 入 is a count value, the time between adjacent speed pulses=P 入 / Fclk;
[0041] S2, update the effective pulse period in real time;
[0042] S3. Input shaft speed calculation:
[0043] For each revolution of the input shaft, take all the pulse periods sampled in this time period, and calculate the average value P of all pulse periods sampled in the period of one revolution of the input shaft 入nx ;
[0044]...
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The invention provides a gearbox rotating speed measuring method. The gearbox rotating speed measuring method comprises the steps that an input shaft rotating speed measuring sensor is arranged on a fluted disk on any gear x, the rotating speed is sampled at a sampling clock frequency, and the pulse period of a rotating speed pulse is measured; the rotating speed value of an input shaft is calculated according to a transmission ratio and the number of a full circle of teeth on the fluted disk; an output shaft rotating speed measuring sensor is arranged on a fluted disk on an output shaft, the output rotating speed is sampled at a sample time clock frequency, and the pulse period of the output rotating speed pulse is measured; when the gear is fixed, the rotating speed of the output shaft is calculated according to the number of a full circle of teeth on the fluted disk on the output shaft and the pulse period; in the gear shifting process, the rotating speed of the output shaft is calculated according to the average value of k newest pulse periods of the output rotating speed pulses. The gearbox rotating speed measuring method can meet the requirements for accurate, stable and real-time measurement of the rotating speed during gear shifting of a gearbox at the same time.
Description
technical field [0001] The invention is applied in the field of transmission control of electric vehicles, and in particular relates to a method for measuring the rotational speed of a transmission. Background technique [0002] Regardless of the traditional automobile engine speed control or the current electric vehicle speed control and shift control, the measurement of the speed signal has become an important technical parameter for the safe driving of the car. The accuracy and stability of the speed measurement are extremely important. The traditional speed measurement speed cannot be simultaneously Guarantee its accuracy, timeliness and reliability. [0003] Since the gearbox and motor used in electric vehicles are integrated, when the gearbox shifts gears, the speed of the motor needs to be adjusted. The speed adjustment process has great interference with the speed sensor and the signal conditioning circuit module. The traditional speed sensor signal conditioning modu...
Claims
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IPC IPC(8): G01P3/481
Inventor 张子起高瑶瑶曹政策刘中林
Owner 武汉理工通宇新源动力有限公司