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A voltage-type dimensionality reduction 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 reducing the service life of the system, the system reliability is not high, and achieve the effect of improving reliability

Active Publication Date: 2019-11-22
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • A voltage-type dimensionality reduction speed measurement method and speed measurement device for an electric bicycle
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  • A voltage-type dimensionality reduction speed measurement method and speed measurement device for an electric bicycle

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Such as 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] The second step is to build an observer

[0022] z(0)=z 0

[0023]

[0024] η(0)=η 0

[0025]

[0026] Among them, z is the state variable of the observer; y is the winding voltage between the two phases of the electric bicycle drive motor; are the parameters observed by the observer; z(0) and z 0 is the initial value of the observed variable (value range is 0-1000); η is the intermediate state variable 1; is the intermediate state variable 2; η(0) and η 0 is the initial value of the intermediate variable (the value range is 0-1000); β is the control parameter (the value range is 0-10000); α is...

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Abstract

The invention discloses an electric bicycle voltage type dimension-reducing velocity measurement method and velocity measurement apparatus. The apparatus comprises a voltage sensor, a signal amplifier, a filter, a speed estimator and a Bluetooth output module. The voltage sensor acquires winding voltages between two phases of a driving motor of an electric bicycle, acquired signals, after being processed by the signal amplifier and the filter, are sent to the speed estimator, and through estimation of the speed estimator, a speed of the electric bicycle is output through the Bluetooth output module. The apparatus and method provided by the invention have the following advantages: the electric bicycle voltage type dimension-reducing velocity measurement method and velocity measurement apparatus are brought forward by taking the electric bicycle which takes the driving motor as a permanent magnetic synchronous motor as a research object, the problem of speed measurement of the electric bicycle is solved, and at the same time, the reliability of a speed measurement system is improved.

Description

technical field [0001] The invention relates to a voltage-type dimension-reduction speed measurement method and a speed measurement device for an electric bicycle whose driving motor is a permanent magnet synchronous motor. Background technique [0002] As people's concept of green travel continues to increase, 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 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/46
CPCG01P3/46
Inventor 王立吴喜桥李雪萍
Owner HENAN NORMAL UNIV