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Method for estimating operating speed of elevator door based on energy threshold algorithm

A technology of energy threshold and speed estimation, applied in calculation, transportation and packaging, complex mathematical operations, etc., can solve problems such as speed signal error and distortion, achieve accurate judgment, improve efficiency, and reduce labor costs

Active Publication Date: 2018-11-23
HANGZHOU DIANZI UNIV +1
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Problems solved by technology

The acceleration signal of the elevator door can be used to calculate and estimate its real-time running speed very well, but the acceleration sensor is accompanied by various noises and interferences during the on-site acquisition process, resulting in the integrated speed signal in the process of acceleration signal processing. A large error, and the result after the second integration has serious distortion

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  • Method for estimating operating speed of elevator door based on energy threshold algorithm
  • Method for estimating operating speed of elevator door based on energy threshold algorithm
  • Method for estimating operating speed of elevator door based on energy threshold algorithm

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Embodiment Construction

[0089] The present invention will be further described below in conjunction with accompanying drawing and example.

[0090] like Figure 1-7 As shown, the present invention adopts a time-domain detrending term, fast Fourier transform to frequency-domain filtering, and inverse Fourier transform to time-domain by processing the measured elevator door acceleration signal, and adopts an energy threshold algorithm for denoising. Integrate the algorithm to obtain the precise speed signal, and propose a real-time running speed estimation method of the elevator door based on the energy threshold algorithm.

[0091] The present invention first obtains through on-the-spot measurement figure 1 The raw signal of the acceleration of the elevator door is chaotic and disorderly. figure 2 It is the time-domain image after detrending the original signal of the acceleration, and the image after the detrending process is shifted to the horizontal line as a whole, which means that a large amou...

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Abstract

The invention discloses a method for estimating the operating speed of an elevator door based on an energy threshold algorithm. The method comprises the following steps: 1, obtaining an original acceleration signal of the operation of the elevator door through an acceleration sensor; 2, performing the detrend item processing of an obtained acceleration signal; 3, converting the signal to a frequency domain through the fast Fourier transform, and performing the filtering to remove noise; 4, carrying out the inverse Fourier transform of the filtered frequency domain signal, and calculating the energy of the acceleration signal; 5, setting a threshold value for the operating stage of an elevator, and removing a jitter noise signal; 6, performing the integrating processing of a final acceleration signal q(t) to obtain a corresponding real-time speed signal. The method removes the jitter interference signal at the opening and closing moments of the elevator and at the opening and closing gaps, can guarantee the reduction of usable signals, and obtains a speed signal through integration.

Description

technical field [0001] The invention belongs to the field of electrical control and digital signal processing, and relates to a method for estimating the real-time running speed of an elevator door based on an energy threshold algorithm. Background technique [0002] As a means of public transportation, the most basic and essential function of an elevator is to ensure that people or goods are delivered to the destination floor smoothly and safely. Ensuring the safe operation of elevators and minimizing losses has become a top priority for government regulators, elevator manufacturers, elevator suppliers and other departments to urgently solve. [0003] In the safe operation of the elevator, the door switch and running speed are one of the important indicators to measure whether the elevator is running normally. The acceleration signal of the elevator door can be used to calculate and estimate its real-time running speed very well, but the acceleration sensor is accompanied ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06F17/15G06F17/11B66B5/00
CPCG06F17/11G06F17/156B66B5/0018G06F2218/02G06F2218/08
Inventor 曹九稳戴浩桢张未来
Owner HANGZHOU DIANZI UNIV
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