A voltage-type speed measurement method and speed measurement device for an electric bicycle
An electric bicycle, voltage-type technology, applied in the direction of the device using the electric/magnetic method, can solve the problems of low reliability of the system, reduce the service life of the system, etc., and achieve the effect of solving the problem of vehicle speed measurement and improving reliability
Active Publication Date: 2019-11-08
HENAN NORMAL UNIV
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Problems solved by technology
The current achievements are as follows: a speed measurement system for electric bicycles is designed in the patent "A Speed Measurement System for Electric Bicycles" with the authorized announcement number CN204255973U. However, the system uses photoelectric sensors, which will reduce the service life of the system when the bicycle bumps; The patent "Bicycle Speed Measuring System" with the authorized announcement number CN102087297B can also realize bicycle speed measurement. However, this method requires a light emitting module and a light receiving module. Considering that the bicycle may run bumpy, the reliability of the system is still not high.
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[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0019] like figure 1 Shown, the present invention comprises the following steps:
[0020] The first step is to collect the winding voltage y between the two phases of the electric bicycle drive motor, and go to the second step. ;
[0021] In the second step, the control coefficient matrix L is designed using the pole configuration technique, so that A+LC is a Hurwitz matrix. Go to step three. in, C=[1 0];
[0022] The third step is to build the observer
[0023]
[0024]
[0025]
[0026] in, C=[1 0]; and are the observer state variable 1 and state variable 2 respectively; y is the winding voltage between the two phases of the electric bicycle drive motor; is the parameter observed by the observer; and is the initial value of the observed variable (value range is 0 to 1000); l is the intermediate state variable; l(0) and l 0...
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The invention discloses an electric bicycle voltage type speed measurement method and a speed measurement device. The speed measurement device comprises a voltage sensor, a signal amplifier, a filter, a bicycle speed estimator and a Bluetooth output module. The voltage sensor collects winding voltage between two phases of a driving motor of an electric bicycle; the collected signal is processed by the signal amplifier and the filter and then is transmitted to the bicycle speed estimator; and through the estimation of the bicycle speed estimator, the speed of the electric bicycle is outputted through the Bluetooth output module. The beneficial effects of the invention are that: by taking the electric bicycle which uses a permanent magnet synchronous motor as the driving motor as a research object, the invention provides the electric bicycle voltage speed measurement method and the speed measurement device, which solve the electric bicycle speed detection problem while improving reliability of a speed detection system.
Description
technical field [0001] The invention relates to a voltage-type speed measurement method and a speed measurement device of an electric bicycle whose drive motor is a permanent magnet synchronous motor. Background technique [0002] With the enhancement of people's environmental awareness, electric bicycles are increasingly favored by users. In the market, permanent magnet synchronous motors are widely used as driving motors for electric bicycles due to their small size and high power density. Accurate speed measurement of electric bicycles has also become one of the necessary functions of electric bicycles. The current achievements are as follows: a speed measurement system for electric bicycles is designed in the patent "A Speed Measurement System for Electric Bicycles" with the authorized announcement number CN204255973U. However, the system uses photoelectric sensors, which will reduce the service life of the system when the bicycle bumps; The patent "Bicycle Speed M...
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IPC IPC(8): G01P3/52
CPCG01P3/52
Inventor 王立吴喜桥李雪萍
Owner HENAN NORMAL UNIV