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Dynamic adjustment first-order lag filtering method with high sensitivity

A dynamic adjustment, high sensitivity technology, applied in the field of signal processing, can solve the problem of inability to take into account sensitivity and smoothness

Inactive Publication Date: 2018-04-20
CHIPSEA TECH SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Based on this, therefore the primary purpose of the present invention is to provide a first-order lag filter method with high sensitivity and dynamic adjustment, which can not be restricted by hardware conditions, and overcome the problem that the traditional first-order lag filter cannot take into account sensitivity and smoothness. defect

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  • Dynamic adjustment first-order lag filtering method with high sensitivity
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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] figure 1 As shown, it is the first-order lag filter method of dynamic adjustment realized by the present invention, figure 1 As shown in , the filtering process is as follows:

[0029] Step 1: First, redesign the filter formula and improve the traditional first-order lag filter formula to reduce the amount of calculation. In order to facilitate the calculation of the single-chip computer of the high-precision kitchen scale, the filter formula is designed as follows:

[0030] Yn=Xn*α÷256+Yn-1*(256-α)÷256 (Formula 1)

[0031] In (Formula 1), α is the filter coefficient (value range 0-255); ...

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Abstract

The invention discloses a dynamic adjustment first-order lag filtering method with high sensitivity. The method comprises the steps of adjusting a filtering coefficient; judging a data change direction of this time; judging whether to accelerate response shake elimination count or not and updating a filtering counter; judging whether the filtering counter reaches the maximum or not; updating the filtering coefficient; and the like. According to the method, the constraint of a hardware condition can be removed, and the defect that the sensitivity and stability cannot be taken into considerationat the same time in a traditional first-order lag filtering method is overcome.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to a filtering method for signals. Background technique [0002] At present, the goal of signal processing is to eliminate uninteresting signals, and the means of elimination can be roughly divided into two categories: hardware and software. [0003] On the hardware, by adding filter circuits, high-performance AD ​​and other methods are adopted. The software uses related algorithms according to the law of the signal, and the commonly used signal processing algorithm has a first-order lag filter. It is to use software programming to realize the function of hardware low-pass filter. It has a good suppression effect on periodic interference and is suitable for occasions with high fluctuation frequency. However, this algorithm also has obvious disadvantages: phase lag, low sensitivity, and for single-chip microcomputers without multiplication and division instructions, the ...

Claims

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Application Information

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IPC IPC(8): H03H17/02
CPCH03H17/0201
Inventor 姜智陈华辉
Owner CHIPSEA TECH SHENZHEN CO LTD
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