CN113654771B - Formatting method and system for vibration waveform of spring type operating mechanism - Google Patents

Formatting method and system for vibration waveform of spring type operating mechanism Download PDF

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Publication number
CN113654771B
CN113654771B CN202110737031.5A CN202110737031A CN113654771B CN 113654771 B CN113654771 B CN 113654771B CN 202110737031 A CN202110737031 A CN 202110737031A CN 113654771 B CN113654771 B CN 113654771B
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vibration waveform
sampling point
data
operating mechanism
type operating
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CN113654771A (en
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周玮
李鹏
刘宗杰
董勤晓
雷雨秋
李会兵
余辉
李志远
刘赫
方泳皓
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
Jining Power Supply Co
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
Jining Power Supply Co
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3275—Fault detection or status indication
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation

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  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

The invention provides a formatting method and a formatting system of a vibration waveform of a spring-type operating mechanism, which are characterized in that through analyzing a vibration waveform history sample of the spring-type operating mechanism, experience values for determining a vibration waveform starting interval and a starting position are calculated and used as a first threshold Q 1 for judging the starting interval of a collected sample and a second threshold Q 2 for judging the starting position of the starting interval of the sample, then the collected vibration waveform sample of the spring-type operating mechanism is uniformly divided into N groups according to set conditions, each group of sampling point data is processed to generate a data set, the vibration waveform starting interval is determined according to the data set and the first threshold Q 1, and finally the vibration waveform starting position is determined according to the sampling point data in the vibration waveform starting interval and the first threshold Q 2. The method and the system can effectively avoid pulse interference in the vibration waveform of the spring type operating mechanism, so that the accuracy of determining the starting position of the vibration waveform reaches more than 99%, and further, data consistency guarantee is provided for subsequent fault diagnosis.

Description

Formatting method and system for vibration waveform of spring type operating mechanism
Technical Field
The present invention relates to the field of high voltage signal processing, and more particularly, to a method and system for formatting vibration waveforms for a spring-type operating mechanism.
Background
The operating mechanism of the GIS breaker has the main function of realizing the separation and combination of the contacts. The operating mechanism is a very important component of the circuit breaker, and the failure of the mechanism can have very serious consequences. There are many different types of mechanisms available for selection by different types of circuit breakers. A common feature of all mechanisms is the storage of potential energy in an elastic medium, which can be obtained by storing energy from a low power source for a longer period of time, such as a low power motor. During the closing and opening operations, the accumulated energy is released in milliseconds, providing a significant work of operation to accelerate the contacts to the desired speed before they are separated.
According to the difference of energy storage modes, three types of operating mechanisms suitable for GIS circuit breakers are generally adopted: spring type, hydraulic type and compressed air type. In one embodiment, several types of combinations are possible, such as pneumatic opening and spring closing, and vice versa. Some medium voltage circuit breakers, such as vacuum circuit breakers, use electromagnetic operating mechanisms. There is also a recent operating mechanism that is motor driven. Among them, spring-type and hydraulic-spring-type operating mechanisms are the most widely used operating mechanisms in practical applications of electric power systems. The spring operating mechanism uses the stored energy spring as a power source to realize the opening and closing of the circuit breaker. The method is widely applied to various products of 72.5 kV-252 kV series circuit breakers (including GIS circuit breakers) of a power system. During the operation of the spring type operating mechanism, metallic collision mainly occurs. The acceleration sensor can be used for measuring rich vibration signals generated in the action process of the spring type operating mechanism. If the spring type operating mechanism has a latent fault, the vibration signal of the spring type operating mechanism has unique characteristics. The latent fault can be identified by processing and analyzing the vibration signal, and the operating mechanism is maintained and overhauled in time, so that the latent fault is prevented from being aggravated, and the operating mechanism and even the breaker or the isolating switch are prevented from being invalid. The vibration signal is processed and analyzed, and the first step is to format it so that the starting time and the time length of the vibration waveform are consistent. If the formatting causes inaccurate determination of the start time of the vibration waveform, the accuracy of the subsequent data processing and analysis process will be greatly affected. The first independent pulse waveform of the vibration waveform is found to be caused by electromagnetic interference caused by the instant of switching on and off electromagnet, and is introduced into a measuring system through a sensor shell or a power supply. Because the on-line monitoring system of the operating mechanism can only share the power supply with the switching-on/off electromagnet, the interference is difficult to eliminate. In the prior art, the starting position of vibration is judged directly by setting a threshold value, so that the vibration is easy to be interfered by a first independent pulse in a waveform, and the occurrence time of the first independent pulse is used as the starting time of the vibration waveform by mistake. How to eliminate the interference of the first pulse and accurately judge the starting position of the vibration waveform, so that the effective formatting of the vibration waveform of the spring-type operating mechanism lacks a technical means for realizing the related implementation.
Disclosure of Invention
In order to solve the problem that the prior art lacks a technical scheme for effectively formatting the vibration waveform of the spring type operating mechanism so as to accurately judge the starting problem of the vibration waveform, the invention provides a formatting method of the vibration waveform of the spring type operating mechanism, which comprises the following steps:
Uniformly dividing a vibration waveform sample of the spring type operating mechanism into N groups according to time scales, wherein N is a natural number;
Calculating the average value of the group of waveforms according to the data of L sampling points in the i-th group of waveforms, taking an absolute value of the difference between the data of each sampling point and the average value, and summing the absolute values to S i to generate a data set S= { S 1,S2……Si……SN }, wherein i is more than or equal to 1 and less than or equal to N;
Determining a vibration waveform starting interval of a vibration waveform sample of the spring type operating mechanism according to a set first threshold Q 1 and a data set S, and determining the total number L' of sampling point data of the vibration waveform starting interval, wherein the vibration waveform starting interval is a j-1 th group and a j-1 th group of vibration waveforms, and j is more than or equal to 1 and less than or equal to N-1;
And determining the vibration waveform starting position of the vibration waveform sample of the spring type operating mechanism according to the set second threshold Q 2 and the total number L' of the sampling point data.
Further, before the vibration waveform sample of the spring type operating mechanism is uniformly divided into N groups according to the time scale, the method further comprises: and collecting vibration waveform data of the spring type operating mechanism, and when the sampling point data is larger than a set collection threshold value, generating and storing vibration waveform samples of the spring type operating mechanism according to a set sampling interval, wherein the sampling interval comprises [ t-t 0, t ] and [ t, t+t 1 ], and t is the time when the sampling point data is larger than the set collection threshold value.
Further, the vibration waveform sample of the spring type operating mechanism is uniformly divided into N groups according to time scales, wherein the calculation formula of N is as follows:
Wherein T is the total time length of a vibration waveform sample of the spring type operating mechanism, and T a is the starting time of continuous occurrence of a vibration signal in the vibration waveform determined according to a historical sample of the vibration waveform of the spring type operating mechanism; t b is the time at which the independent pulse first occurs in the vibration waveform determined from the historical sample of the vibration waveform of the spring-type operating mechanism, Representing an upward rounding.
And taking j from 1 to N-1 in order from small to large, determining that a vibration waveform starting interval is the j-1 th group and the j-th group vibration waveforms when the value of j meets a first criterion min (S j,Sj+1,Sj+2……SN)＞Q1), wherein Q 1 is the number of the group where the manually determined vibration waveform starting position is located, 2 x is less than or equal to N, in the N groups of vibration waveforms, when historical samples of the vibration waveforms of the spring type operating mechanism are uniformly divided into N groups according to time scales, calculating the average value of the group of waveforms according to data of L sampling points in the i groups of waveforms, taking an absolute value of the difference between the data of each sampling point and the average value, and summing the absolute values to S i to generate a data set S= { S 1,S2……Si……SN }, wherein 1 is less than or equal to N and x is less than or equal to 2 times the maximum value selected from the data set S' = { S 1,S2……Sx-1 }.
When j=1, the total number L' =l of sampling point data in the initial interval of the vibration waveform;
When j is more than 1 and less than or equal to N-1, the total number L' =2L of sampling point data in the initial interval of the vibration waveform.
Further, the determining the vibration waveform starting position of the vibration waveform sample of the spring-type operating mechanism according to the set second threshold Q 2 and the total number L' of the sampling point data includes:
Taking K from 1 to L '-K in the order from small to large, and taking data from a kth sampling point to a (K+k) -1 sampling point as a data set Z k, wherein K 0 is less than or equal to K and less than or equal to L'/5;
Calculating an average value of K sampling point data in a data set Z k, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values S k;
And when S k＞Q2, determining the starting position of the vibration waveform as a kth sampling point, wherein Q 2 is an empirical value obtained by manually determining the starting position of the vibration waveform as the kth sampling point in a history sample of the vibration waveform of the spring type operating mechanism, calculating an average value from the kth sampling point data to the (K+k) -1 th sampling point data, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values.
According to another aspect of the present invention, there is provided a system for formatting a vibration waveform of a spring-type operating mechanism, the system comprising:
The data grouping unit is used for uniformly dividing the vibration waveform sample of the spring type operating mechanism into N groups according to time scales, wherein N is a natural number;
A data set unit, which is used for calculating the average value of the group of waveforms according to the data of L sampling points in the i-th group of waveforms, taking an absolute value for the difference between the data of each sampling point and the average value, and summing the absolute values to S i, so as to generate a data set S= { S 1,S2……Si……SN }, wherein 1 is less than or equal to i is less than or equal to N;
the starting interval unit is used for determining a vibration waveform starting interval of the vibration waveform sample of the spring type operating mechanism according to the set first threshold Q 1 and the data set S, and determining the total number L' of sampling point data of the vibration waveform starting interval, wherein the vibration waveform starting interval is a j-1 th group and a j-1 th group of vibration waveforms, and j is more than or equal to 1 and less than or equal to N-1;
And the starting position unit is used for determining the vibration waveform starting position of the vibration waveform sample of the spring type operating mechanism according to the set second threshold value Q 2 and the total number L' of the sampling point data.
Further, the system also comprises a data sample unit for collecting vibration waveform data of the spring type operating mechanism, when the sampling point data is larger than a set collection threshold value, a vibration waveform sample of the spring type operating mechanism is generated and stored according to a set sampling interval, wherein the sampling interval comprises [ t-t 0, t ] and [ t, t+t 1 ], and t is the time when the sampling point data is larger than the set collection threshold value.
Further, the data grouping unit uniformly divides the vibration waveform sample of the spring type operating mechanism into N groups according to time scales, wherein the calculation formula of N is as follows:
Wherein T is the total time length of a vibration waveform sample of the spring type operating mechanism, and T a is the starting time of continuous occurrence of a vibration signal in the vibration waveform determined according to a historical sample of the vibration waveform of the spring type operating mechanism; t b is the time at which the independent pulse first occurs in the vibration waveform determined from the historical sample of the vibration waveform of the spring-type operating mechanism, Representing an upward rounding.
Further, the initial section unit determines a vibration waveform initial section of the vibration waveform sample of the spring-type operating mechanism according to the set first threshold Q 1 and the data set S, and determines the total number L' of sampling points of the vibration waveform initial section includes:
And taking j from 1 to N-1 in order from small to large, determining that a vibration waveform starting interval is the j-1 th group and the j-th group vibration waveforms when the value of j meets a first criterion min (S j,Sj+1,Sj+2……SN)＞Q1), wherein Q 1 is the number of the group where the manually determined vibration waveform starting position is located, 2 x is less than or equal to N, in the N groups of vibration waveforms, when historical samples of the vibration waveforms of the spring type operating mechanism are uniformly divided into N groups according to time scales, calculating the average value of the group of waveforms according to data of L sampling points in the i groups of waveforms, taking an absolute value of the difference between the data of each sampling point and the average value, and summing the absolute values to S i to generate a data set S= { S 1,S2……Si……SN }, wherein 1 is less than or equal to N and x is less than or equal to 2 times the maximum value selected from the data set S' = { S 1,S2……Sx-1 }.
When j=1, the total number L' =l of sampling point data in the initial interval of the vibration waveform;
When j is more than 1 and less than or equal to N-1, the total number L' =2L of sampling point data in the initial interval of the vibration waveform.
Further, the determining, by the starting position unit, the vibration waveform starting position of the vibration waveform sample of the spring-type operating mechanism according to the set second threshold Q 2 and the total number L' of the sampling point data includes:
Taking K from 1 to L' -K in order from small to large, and taking data from the kth sampling point to the (K+k-1) th sampling point as a data set Z k, wherein, Wherein K 0 is a natural number;
Calculating an average value of K sampling point data in a data set Z k, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values S k;
And when S k＞Q2, determining the starting position of the vibration waveform as a kth sampling point, wherein Q 2 is an empirical value obtained by manually determining the starting position of the vibration waveform as the kth sampling point in a history sample of the vibration waveform of the spring type operating mechanism, calculating an average value from the kth sampling point data to the (K+k) -1 th sampling point data, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values.
According to the formatting method and the formatting system for the vibration waveform of the spring-type operating mechanism, through analysis of the vibration waveform history sample of the spring-type operating mechanism, experience values for determining a vibration waveform starting interval and a starting position are calculated and used as a first threshold Q 1 for judging the starting interval of a collected sample and a second threshold Q 2 for judging the starting position of the starting interval of the sample, then the collected vibration waveform sample of the spring-type operating mechanism is uniformly divided into N groups according to set conditions, each group of sampling point data is processed to generate a data set, the vibration waveform starting interval is determined according to the data set and the first threshold Q 1, and finally the vibration waveform starting position is determined according to the sampling point data in the vibration waveform starting interval and the first threshold Q 2. The method and the system can effectively avoid pulse interference in the vibration waveform of the spring type operating mechanism, so that the accuracy of determining the starting position of the vibration waveform reaches more than 99%, and further, data consistency guarantee is provided for subsequent fault diagnosis.
Drawings
Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:
FIG. 1 is a flow chart of a method for formatting vibration waveforms of a spring type operating mechanism according to a preferred embodiment of the present invention;
Fig. 2 is a waveform diagram of vibration when the spring type operating mechanism is closed according to the preferred embodiment of the present invention;
fig. 3 is a schematic diagram of a system for formatting vibration waveforms of a spring type operating mechanism according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flowchart of a method for formatting vibration waveforms of a spring type operating mechanism according to a preferred embodiment of the present invention. As shown in fig. 1, a method 100 for formatting a vibration waveform of a spring-type operating mechanism according to the preferred embodiment starts in step 101.
In step 101, vibration waveform data of the spring type operating mechanism is collected, when the sampling point data is greater than a set collection threshold value, a vibration waveform sample of the spring type operating mechanism is generated and stored according to a set sampling interval, wherein the sampling interval comprises [ t-t 0, t ] and [ t, t+t 1 ], and t is the time when the sampling point data is greater than the set collection threshold value.
In the preferred embodiment, the vibration waveform of the spring type operating mechanism is collected through the oscilloscope according to the designed sampling rate, when the vibration signal does not trigger the collection threshold value, the oscilloscope only collects the signal and does not store the signal, and when the sampling point data is larger than the set collection threshold value, the vibration waveform sample of the spring type operating mechanism is generated according to the set sampling interval and stored. Fig. 2 is a waveform diagram of vibration when the spring type operating mechanism is closed according to the preferred embodiment of the present invention. As shown in fig. 2, vibration pulse appears at the position of 0.15s, and takes the vibration pulse as an acquisition origin, 150ms sampling point data is acquired forwards, 350ms sampling point data is acquired backwards, and the total time length t=0.5 s of the vibration waveform sample of the spring-type operating mechanism is obtained, wherein the total number of data sampling points is 100000.
In step 102, the vibration waveform sample of the spring-type operating mechanism is uniformly divided into N groups according to the time scale, wherein N is a natural number.
Preferably, the vibration waveform sample of the spring type operating mechanism is uniformly divided into N groups according to time scales, wherein the calculation formula of N is as follows:
Wherein T is the total time length of a vibration waveform sample of the spring type operating mechanism, and T a is the starting time of continuous occurrence of a vibration signal in the vibration waveform determined according to a historical sample of the vibration waveform of the spring type operating mechanism; t b is the time at which the independent pulse first occurs in the vibration waveform determined from the historical sample of the vibration waveform of the spring-type operating mechanism, Representing an upward rounding.
As can be seen from fig. 2, in the vibration waveform of the spring-type operating mechanism, the vibration waveform is continuous or continuous from the occurrence of the first vibration pulse, but the continuous vibration starts to occur after a certain period of time. When the spring type operating mechanism is used for switching on and off, the starting time of the switching-on and switching-off coil current is 0.15s, the switching-on and switching-off electromagnet does not start to act, the operating mechanism should not have vibration signals, pulses in the vibration waveform appearing at the moment should be electromagnetic interference, and only the time of 0.17s is the time when the vibration waveform continuously vibrates. Assuming that fig. 2 is a vibration waveform history sample, it can be determined that t a＝0.17s,tb =0.15 s. Since the vibration waveforms of samples of the same sensor, the same installation position of the same operating mechanism, the same oscilloscope, the same sampling rate and different moments collected by the filter have the same characteristics under normal conditions, the samples are collected according to the installation of the spring-type operating mechanism, and t a and t b which are determined by analysis are empirical values which can be used as subsequent sample formatting, and the first threshold Q 1 and the second threshold Q 2 are the same as described below.
In step 103, calculating the average value of the i-th set of waveforms according to the data of L sampling points in the set of waveforms, taking an absolute value of the difference between the data of each sampling point and the average value, and summing the absolute values S i to generate a data set S= { S 1,S2……Si……SN }, wherein 1 is less than or equal to i is less than or equal to N;
In step 104, a vibration waveform starting interval of the vibration waveform sample of the spring-type operating mechanism is determined according to the set first threshold value Q 1 and the data set S, and the total number L' of sampling point data of the vibration waveform starting interval is determined, wherein the vibration waveform starting interval is the j-1 th group and the j-1 th group of vibration waveforms, and j is more than or equal to 1 and less than or equal to N-1.
In step 105, a vibration waveform starting position of the vibration waveform sample of the spring-type operating mechanism is determined according to the set second threshold value Q 2 and the total number L' of the sampling point data.
Preferably, the determining the vibration waveform starting section of the vibration waveform sample of the spring-type operating mechanism according to the set first threshold Q 1 and the data set S, and determining the total number L' of sampling point data of the vibration waveform starting section includes:
And taking j from 1 to N-1 in order from small to large, determining that a vibration waveform starting interval is the j-1 th group and the j-th group vibration waveforms when the value of j meets a first criterion min (S j,Sj+1,Sj+2……SN)＞Q1), wherein Q 1 is the number of the group where the manually determined vibration waveform starting position is located, 2 x is less than or equal to N, in the N groups of vibration waveforms, when historical samples of the vibration waveforms of the spring type operating mechanism are uniformly divided into N groups according to time scales, calculating the average value of the group of waveforms according to data of L sampling points in the i groups of waveforms, taking an absolute value of the difference between the data of each sampling point and the average value, and summing the absolute values to S i to generate a data set S= { S 1,S2……Si……SN }, wherein 1 is less than or equal to N and x is less than or equal to 2 times the maximum value selected from the data set S' = { S 1,S2……Sx-1 }.
When j=1, the total number L' =l of sampling point data in the initial interval of the vibration waveform;
When j is more than 1 and less than or equal to N-1, the total number L' =2L of sampling point data in the initial interval of the vibration waveform.
Preferably, the determining the vibration waveform starting position of the vibration waveform sample of the spring-type operating mechanism according to the set second threshold Q 2 and the total number L' of the sampling point data includes:
Taking K from 1 to L '-K in the order from small to large, and taking data from a kth sampling point to a (K+k) -1 sampling point as a data set Z k, wherein K 0 is less than or equal to K and less than or equal to L'/5;
Calculating an average value of K sampling point data in a data set Z k, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values S k;
And when S k＞Q2, determining the starting position of the vibration waveform as a kth sampling point, wherein Q 2 is an empirical value obtained by manually determining the starting position of the vibration waveform as the kth sampling point in a history sample of the vibration waveform of the spring type operating mechanism, calculating an average value from the kth sampling point data to the (K+k) -1 th sampling point data, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values.
Fig. 3 is a schematic diagram of a system for formatting vibration waveforms of a spring type operating mechanism according to a preferred embodiment of the present invention. As shown in fig. 3, the formatting system 300 of vibration waveforms of the spring type operating mechanism according to the preferred embodiment includes:
and the data sample unit 301 is configured to collect vibration waveform data of the spring-type operating mechanism, and when the sampling point data is greater than a set collection threshold, generate and store vibration waveform samples of the spring-type operating mechanism according to a set sampling interval, where the sampling interval includes [ t-t 0, t ] and [ t, t+t 1 ], and t is a time when the sampling point data is greater than the set collection threshold.
A data grouping unit 302, configured to divide the vibration waveform sample of the spring-type operating mechanism into N groups according to the time scale, where N is a natural number;
A data set unit 303, configured to calculate an average value of the group of waveforms according to data of L sampling points in the i-th group of waveforms, take an absolute value for a difference between data of each sampling point and the average value, and sum the absolute values S i to generate a data set s= { S 1,S2……Si……SN }, where 1.ltoreq.i.ltoreq.n;
The starting interval unit 304 is configured to determine a vibration waveform starting interval of the vibration waveform sample of the spring-type operating mechanism according to a set first threshold Q 1 and a data set S, and determine a total number L' of sampling points of the vibration waveform starting interval, where the vibration waveform starting interval is a j-1 th group and a j-1 th group of vibration waveforms, and j is greater than or equal to 1 and less than or equal to N-1;
And a starting position unit 305, configured to determine a vibration waveform starting position of the vibration waveform sample of the spring-type operating mechanism according to the set second threshold Q 2 and the total number L' of the sampling point data.
Preferably, the data grouping unit 302 uniformly divides the vibration waveform sample of the spring-type operating mechanism into N groups according to the time scale, wherein the calculation formula of N is as follows:
Wherein T is the total time length of a vibration waveform sample of the spring type operating mechanism, and T a is the time when an independent pulse appears for the first time in the vibration waveform determined according to a history sample of the vibration waveform of the spring type operating mechanism; t b is the starting time of the continuous occurrence of the vibration signal in the vibration waveform determined from the historical sample of the vibration waveform of the spring-type operating mechanism, Representing an upward rounding.
Preferably, the initial interval unit 304 determines, according to the set first threshold Q 1 and the data set S, a vibration waveform initial interval of the vibration waveform sample of the spring-type operating mechanism, and determines the total number L' of sampling points of the vibration waveform initial interval includes:
And taking j from 1 to N-1 in order from small to large, determining that a vibration waveform starting interval is the j-1 th group and the j-th group vibration waveforms when the value of j meets a first criterion min (S j,Sj+1,Sj+2……SN)＞Q1), wherein Q 1 is the number of the group where the manually determined vibration waveform starting position is located, 2 x is less than or equal to N, in the N groups of vibration waveforms, when historical samples of the vibration waveforms of the spring type operating mechanism are uniformly divided into N groups according to time scales, calculating the average value of the group of waveforms according to data of L sampling points in the i groups of waveforms, taking an absolute value of the difference between the data of each sampling point and the average value, and summing the absolute values to S i to generate a data set S= { S 1,S2……Si……SN }, wherein 1 is less than or equal to N and x is less than or equal to 2 times the maximum value selected from the data set S' = { S 1,S2……Sx-1 }.
When j=1, the total number L' =l of sampling point data in the initial interval of the vibration waveform;
When j is more than 1 and less than or equal to N-1, the total number L' =2L of sampling point data in the initial interval of the vibration waveform.
Preferably, the determining, by the starting position unit 305, the vibration waveform starting position of the vibration waveform sample of the spring-type operating mechanism according to the set second threshold Q 2 and the total number L' of the sampling point data includes:
Taking K from 1 to L' -K in order from small to large, and taking data from the kth sampling point to the (K+k-1) th sampling point as a data set Z k, wherein, Wherein K 0 is a natural number;
Calculating an average value of K sampling point data in a data set Z k, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values S k;
And when S k＞Q2, determining the starting position of the vibration waveform as a kth sampling point, wherein Q 2 is an empirical value obtained by manually determining the starting position of the vibration waveform as the kth sampling point in a history sample of the vibration waveform of the spring type operating mechanism, calculating an average value from the kth sampling point data to the (K+k) -1 th sampling point data, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values.
The step of formatting the vibration waveform sample by the formatting system of the vibration waveform of the spring-type operating mechanism to determine the starting position of the vibration waveform is the same as the step adopted by the formatting method of the vibration waveform of the spring-type operating mechanism, and the technical effects achieved by the formatting system are the same, and are not repeated herein.
The invention has been described with reference to a few embodiments. However, as is well known to those skilled in the art, other embodiments than the above disclosed invention are equally possible within the scope of the invention, as defined by the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a/an/the [ means, component, etc. ]" are to be interpreted openly as referring to at least one instance of said means, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.

Claims (10)

1. A method for formatting a vibration waveform of a spring-type operating mechanism, the method comprising:
Uniformly dividing a vibration waveform sample of the spring type operating mechanism into N groups according to time scales, wherein N is a natural number;
Calculating the average value of the group of waveforms according to the data of L sampling points in the i-th group of waveforms, taking an absolute value of the difference between the data of each sampling point and the average value, and summing the absolute values to S i to generate a data set S= { S 1,S2……Si……SN }, wherein i is more than or equal to 1 and less than or equal to N;
Determining a vibration waveform starting interval of a vibration waveform sample of the spring type operating mechanism according to a set first threshold Q 1 and a data set S, and determining the total number L' of sampling point data of the vibration waveform starting interval, wherein the vibration waveform starting interval is a j-1 th group and a j-1 th group of vibration waveforms, and j is more than or equal to 1 and less than or equal to N-1;
And determining the vibration waveform starting position of the vibration waveform sample of the spring type operating mechanism according to the set second threshold Q 2 and the total number L' of the sampling point data.
2. The method of claim 1, wherein prior to uniformly dividing the spring-type actuator vibration waveform samples into N groups according to the time scale, further comprising: and collecting vibration waveform data of the spring type operating mechanism, and when the sampling point data is larger than a set collection threshold value, generating and storing vibration waveform samples of the spring type operating mechanism according to a set sampling interval, wherein the sampling interval comprises [ t-t 0, t ] and [ t, t+t 1 ], and t is the time when the sampling point data is larger than the set collection threshold value.
3. The method of claim 1, wherein the vibration waveform samples of the spring-type operating mechanism are uniformly divided into N groups according to a time scale, wherein the calculation formula of N is:
Wherein T is the total time length of a vibration waveform sample of the spring type operating mechanism, and T a is the starting time of continuous occurrence of a vibration signal in the vibration waveform determined according to a historical sample of the vibration waveform of the spring type operating mechanism; t b is the time at which the independent pulse first occurs in the vibration waveform determined from the historical sample of the vibration waveform of the spring-type operating mechanism, Representing an upward rounding.
4. The method according to claim 1, wherein determining a vibration waveform start section of the vibration waveform sample of the spring-type operating mechanism according to the set first threshold Q 1 and the data set S, and determining a total number L' of sampling point data of the vibration waveform start section includes:
Taking j from 1 to N-1 in order from small to large, determining that a vibration waveform starting interval is a j-1 group and a j-th group vibration waveform when the value of j meets a first criterion min (S j,Sj+1,Sj+2……SN)＞Q1), wherein Q 1 is a number which is equal to or less than 1 and equal to or less than N and is equal to or less than x and is equal to N of a group where a manually determined vibration waveform starting position is located in the N groups of vibration waveforms when historical samples of the vibration waveform of the spring type operating mechanism are uniformly divided into N groups according to time scales, calculating an average value of the group of waveforms according to data of L sampling points in the i-th group of waveforms, taking an absolute value of a difference between data of each sampling point and the average value, summing the absolute values to S i, and generating a data set S= { S 1,S2……Si……SN = { S 1,S2……Sx-1 }, wherein 1 is equal to or less than N and x is equal to or less than N;
when j=1, the total number L' =l of sampling point data in the initial interval of the vibration waveform;
When j is more than 1 and less than or equal to N-1, the total number L' =2L of sampling point data in the initial interval of the vibration waveform.
5. The method of claim 4, wherein determining the vibration waveform starting position of the spring-type actuator vibration waveform sample according to the set second threshold value Q 2 and the total number of sampling point data L' comprises:
Taking K from 1 to L '-K in the order from small to large, and taking data from a kth sampling point to a (K+k) -1 sampling point as a data set Z k, wherein K 0 is less than or equal to K and less than or equal to L'/5;
Calculating an average value of K sampling point data in a data set Z k, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values S k;
And when S k＞Q2, determining the starting position of the vibration waveform as a kth sampling point, wherein Q 2 is an empirical value obtained by manually determining the starting position of the vibration waveform as the kth sampling point in a history sample of the vibration waveform of the spring type operating mechanism, calculating an average value from the kth sampling point data to the (K+k) -1 th sampling point data, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values.
6. A system for formatting a vibration waveform of a spring-type operating mechanism, the system comprising:
The data grouping unit is used for uniformly dividing the vibration waveform sample of the spring type operating mechanism into N groups according to time scales, wherein N is a natural number;
A data set unit, which is used for calculating the average value of the group of waveforms according to the data of L sampling points in the i-th group of waveforms, taking an absolute value for the difference between the data of each sampling point and the average value, and summing the absolute values to S i, so as to generate a data set S= { S 1,S2……Si……SN }, wherein 1 is less than or equal to i is less than or equal to N;
the starting interval unit is used for determining a vibration waveform starting interval of the vibration waveform sample of the spring type operating mechanism according to the set first threshold Q 1 and the data set S, and determining the total number L' of sampling point data of the vibration waveform starting interval, wherein the vibration waveform starting interval is a j-1 th group and a j-1 th group of vibration waveforms, and j is more than or equal to 1 and less than or equal to N-1;
And the starting position unit is used for determining the vibration waveform starting position of the vibration waveform sample of the spring type operating mechanism according to the set second threshold value Q 2 and the total number L' of the sampling point data.
7. The system of claim 6, further comprising a data sample unit configured to collect vibration waveform data of the spring-type actuator, and generate and store vibration waveform data of the spring-type actuator according to a set sampling interval when the sampling point data is greater than a set collection threshold, wherein the sampling interval includes [ t-t 0, t ] and [ t, t+t 1 ], and t is a time when the sampling point data is greater than the set collection threshold.
8. The system of claim 6, wherein the data grouping unit uniformly divides the vibration waveform samples of the spring-type operating mechanism into N groups according to a time scale, wherein the calculation formula of N is:
Wherein T is the total time length of a vibration waveform sample of the spring type operating mechanism, and T a is the starting time of continuous occurrence of a vibration signal in the vibration waveform determined according to a historical sample of the vibration waveform of the spring type operating mechanism; t b is the time at which the independent pulse first occurs in the vibration waveform determined from the historical sample of the vibration waveform of the spring-type operating mechanism, Representing an upward rounding.
9. The system of claim 6, wherein the start interval unit determines a vibration waveform start interval of the vibration waveform sample of the spring-type operating mechanism according to the set first threshold Q 1 and the data set S, and determining the total number L' of sampling points of the vibration waveform start interval includes:
Taking j from 1 to N-1 in order from small to large, determining that a vibration waveform starting interval is a j-1 group and a j-th group vibration waveform when the value of j meets a first criterion min (S j,Sj+1,Sj+2……SN)＞Q1), wherein Q 1 is a number which is equal to or less than 1 and equal to or less than N and is equal to or less than x and is equal to N of a group where a manually determined vibration waveform starting position is located in the N groups of vibration waveforms when historical samples of the vibration waveform of the spring type operating mechanism are uniformly divided into N groups according to time scales, calculating an average value of the group of waveforms according to data of L sampling points in the i-th group of waveforms, taking an absolute value of a difference between data of each sampling point and the average value, summing the absolute values to S i, and generating a data set S= { S 1,S2……Si……SN = { S 1,S2……Sx-1 }, wherein 1 is equal to or less than N and x is equal to or less than N;
when j=1, the total number L' =l of sampling point data in the initial interval of the vibration waveform;
When j is more than 1 and less than or equal to N-1, the total number L' =2L of sampling point data in the initial interval of the vibration waveform.
10. The system of claim 9, wherein the starting position unit determining the vibration waveform starting position of the vibration waveform sample of the spring-type operating mechanism according to the set second threshold value Q 2 and the total number L' of the sampling point data comprises:
Taking K from 1 to L' -K in order from small to large, and taking data from the kth sampling point to the (K+k-1) th sampling point as a data set Z k, wherein, Wherein K 0 is a natural number;
Calculating an average value of K sampling point data in a data set Z k, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values S k;
And when S k＞Q2, determining the starting position of the vibration waveform as a kth sampling point, wherein Q 2 is an empirical value obtained by manually determining the starting position of the vibration waveform as the kth sampling point in a history sample of the vibration waveform of the spring type operating mechanism, calculating an average value from the kth sampling point data to the (K+k) -1 th sampling point data, taking an absolute value of a difference between each sampling point data and the average value, and summing the absolute values.
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