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Waveform Frequency Calculation Method

A technology of waveform frequency and calculation method, which is applied in the field of industrial control, can solve the problems of frequency calculation interference and incorrect calculation, and achieve the effect of shielding interference

Active Publication Date: 2021-05-07
北京威努特技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional frequency calculation method cannot adapt to the change of the waveform, which causes the change of the waveform to cause great interference to the calculation of the frequency and cannot be calculated correctly

Method used

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Examples

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Embodiment Construction

[0026] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] The method of the present invention comprises the following steps:

[0028] Step 1. To determine the center line, first store a piece of waveform data, and the amount of waveform data is greater than or equal to one cycle of the waveform.

[0029] Step 2. Find the maximum value Max and the minimum value Min in the data stored in step 1. The specific steps are as follows:

[0030] Step 2.1, the sampling value assigned to the maximum value Max reaches the minimum value.

[0031] Step 2.2. At the same time assign the minimum value Min to the maximum value reached by a sampling value.

[0032] Step 2.3, by comparing the maximum value Max and the minimum value Min value with the sampled value, when the sampled value is greater than the maximum value Max, the maximum value Max is replaced by the current sampled value, similarly when the sampled valu...

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Abstract

The invention discloses a waveform frequency calculation method, comprising: step 1, determining the center line. Step 2. Find a maximum value Max and a minimum value Min in the data stored in step 1. Step 3. Set the value of the central line Mline as Mline=(Max+Min) / 2. Step 4. When the value of the current waveform is less than Mline, start searching for the maximum value Max when the value of the waveform is greater than or equal to the value of the center line Mline. Step 5. Start searching for the maximum value when the value of the waveform is less than or equal to the value of the center line Mline Minimum value Min. Step 6. Re-correct the value of the central line Mline, that is, Mline=(Max+Min) / 2. Step 7: Calculate the sampling frequency by using the sampling frequency and the sampling points between the maximum value Max and the minimum value Min. The invention has the advantages of automatically adjusting calculation parameters and adaptively calculating the frequency of the waveform according to the change of the waveform, and can automatically shield the interference, and can be filtered out by the algorithm when the amplitude of the interference wave does not exceed the midline value.

Description

technical field [0001] The invention relates to a waveform frequency calculation method and belongs to the technical field of industrial control. Background technique [0002] At present, with the continuous integration of industrialization and informatization, more and more information technologies have been applied to the industrial field. At the same time, due to the widespread use of common software, hardware and network facilities in industrial control systems and the integration with enterprise management information systems, industrial control systems are becoming more and more open, and data exchange occurs with enterprise intranets and the Internet. Therefore, it is necessary to start industrial control vulnerability mining for industrial control equipment, that is, for industrial control equipment to implement vulnerability mining for industrial control protocols. During the test process, it is necessary to monitor multiple outputs of the equipment, and the analog ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 王方立黄敏龙国东
Owner 北京威努特技术有限公司
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