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A Digital Filtering Method with Low Resource Consumption

A technology of resource consumption and digital filtering, applied in the direction of digital technology network, impedance network, electrical components, etc., to achieve the effect of occupying less resources

Active Publication Date: 2017-08-25
SHENYANG NORTHEAST ELECTRIC POWER CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a digital filtering method with low resource consumption, which solves the problem of balance between the effect of analog low-pass filtering and resource occupation in the process of automatic control of industrial equipment realized by small microcontrollers

Method used

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  • A Digital Filtering Method with Low Resource Consumption
  • A Digital Filtering Method with Low Resource Consumption
  • A Digital Filtering Method with Low Resource Consumption

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Embodiment Construction

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described in detail below by taking the application of the method of the present invention in the "controller of steam extraction adjustment valve" as an embodiment and referring to the accompanying drawings.

[0019] One working mode of the extraction steam adjustment valve is "remote control", that is, the central control room controls the extraction steam adjustment valve through the analog "control command", and the extraction steam control valve controller receives the "control command" from the central control room and Real-time detection of the analog "valve position feedback signal" from the steam extraction adjustment valve for control processing. Because these two signals are analog quantities, they are inevitably subject to various interferences during transmission, so filtering must be performed.

[0020] After t...

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Abstract

The present invention relates to the field of industrial automatic control, in particular to a digital filtering method with low resource consumption, comprising: setting filtering related parameters, and obtaining the sampling value of each sampling through N times of sampling, where N is a natural number; when the first sampling value is detected , the first sampling value is directly output as the first filtering; for sampling values ​​other than the first sampling value, it is judged whether the difference between this sampling value and the last sampling value is within the relative variation range of the sampling value; if it is , the weighted average calculation is performed on the current sampling value and the previous sampling value to obtain the current filtering output, otherwise, according to the processing strategy of the sampling value beyond the normal range, it is decided to use the current sampling value as the current filtering output or transfer to the next filtering output calculation. The invention has the advantages of occupying less resources and avoiding memory overflow, and is suitable for the application of small and micro-controllers in most industrial environments.

Description

technical field [0001] The invention relates to the field of industrial automatic control, in particular to a digital filtering method with low resource consumption, which is used for digital filtering of collected analog quantities. Background technique [0002] In the field of industrial automatic control, due to the limitation of the on-site electromagnetic environment, noises of different orders of magnitude are often coupled into the on-site analog signal of the equipment. If the analog signal is not filtered, it will affect the performance and control quality of the system. Usually, it can be used There are two ways of hardware filtering or software filtering for filtering. [0003] Hardware filtering refers to the use of hardware filters to directly filter analog signals. This method is necessary and irreplaceable for simple systems that only use analog circuits. However, when sampling a digital control system, software can also be used to filter the sampled values ​...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H17/02
Inventor 刘宝军张弢王学东
Owner SHENYANG NORTHEAST ELECTRIC POWER CONTROL