Rotating speed measurement method and displacement data detection method for washing machine with MEMS sensor
A technology for speed measurement and washing machine, which is applied to the control device of washing machine, washing device, textile and paper making, etc. It can solve the problems of consuming hardware and software resources, low resolution of washing machine speed, and affecting the accuracy of displacement measurement, so as to reduce the impact of interference , Reduce system complexity, reduce the effect of data transmission
Inactive Publication Date: 2021-02-02
厦门翰普电子有限公司
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However, the rotational speed of the washing machine is usually measured by means of a rotary encoder or by measuring the rotational speed of the washing machine motor, which consumes redundant hardware and software resources, and the measured rotational speed data is a unidirectional rotational speed, and the washing machine will have relatively large Large speed disturbance, which makes the obtained washing machine speed resolution low, and thus affects the accuracy of displacement measurement
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[0029] like figure 1 As shown, the present invention discloses a method for measuring the rotational speed of a washing machine with a MEMS sensor, which comprises the following steps:
[0030] S11. Collect the MEMS sensor once with a certain adoption period T to obtain the original acceleration data of the three axes, and then take out the zero offset acceleration values respectively to obtain the acceleration data of the three axes, accumulate the sampling times, and store the sampling values;
[0031] S12. Judging whether the sampling frequency M is greater than the set sampling frequency, if not greater, then enter step S11, and continue to collect the original three-axis acceleration data; otherwise, clear the sampling frequency to zero, and process the stored three-axis acceleration data, Obtain new triaxial acceleration data; through this step, the random interference of the triaxial data can be removed.
[0032] In this embodiment, the number of sampling times is se...
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The invention relates to a rotating speed measurement method and a displacement data detection method for a washing machine with an MEMS sensor. A vibration detection module in the washing machine with the MEMS sensor is used for obtaining rotating speed data through three-axis acceleration data, interference impact in a working process is reduced through the filtering of three-axis rotating speeddata, and thus more stable and accurate rotating speed data of the washing machine is obtained. The rotating speed data of the washing machine can provide more accurate rotating speed reference for washing machine vibration detection, and is used for setting different IIR filter parameters and gains of a washing machine vibration detection module. Moreover, since there is no need to provide a rotating speed signal outside the washing machine and an upper computer is not needed to transmit a real-time rotating speed, data transmission with the upper computer is reduced, occupied chip resourcesof the upper computer are reduced, and the system complexity of the washing machine is reduced.
Description
technical field [0001] The invention relates to the field of washing machine application control, in particular to a washing machine rotation speed measurement method and displacement data detection method. Background technique [0002] When the washing machine dehydrates, the motor is used as the power source. The vibration generated by the motor during operation becomes the vibration source of the washing machine. The inner cylinder rotates under the drive of the motor. Due to the existence of clothes, an eccentric load will be generated inside the inner cylinder, causing the inner cylinder to Vibration will occur due to variable load and eccentric direction. At the same time, the outer cylinder will also vibrate due to the vibration of the motor and the vibration of the inner cylinder. If the amplitude is too large, it will collide with the shell of the washing machine, which will affect the washing effect and service life of the washing machine. . Therefore, measuring t...
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IPC IPC(8): D06F33/48D06F103/24D06F103/26
CPCD06F33/48D06F2103/24D06F2103/26
Inventor 吴山水杨连军李云孝
Owner 厦门翰普电子有限公司