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CN-121165693-B - Fault diagnosis method for beam profile detector control panel

CN121165693BCN 121165693 BCN121165693 BCN 121165693BCN-121165693-B

Abstract

The invention relates to the technical field of fault diagnosis, and particularly discloses a fault diagnosis method for a control panel of a beam profile detector, comprising the following steps of S1, acquiring digital signals of all acquisition channels in different working environments in a set time window, and calculating stability indexes of the signals by comparison; the method comprises the steps of S2, screening out two signals with highest stability indexes and corresponding channels as stability channels, and calculating correlation coefficients between the two stability signals, S3, acquiring real-time digital signals of the stability channels and the correlation coefficients thereof in real time when equipment works, generating a correlation coefficient regression line, and judging whether the equipment has faults or not by calculating whether the included angle between the regression line and a horizontal line exceeds a preset threshold value or not.

Inventors

  • QIAN LEI
  • Chong Jiacheng

Assignees

  • 无锡锐捷芯盛电子科技有限公司

Dates

Publication Date
20260508
Application Date
20251028

Claims (7)

  1. 1. The fault diagnosis method for the beam profile detector control board is characterized by comprising the following steps: step S1, acquiring all acquisition channels of a beam profile detector, setting a time window, acquiring digital signals of all the acquisition channels under different working environments in the time window, and comparing all the digital signals to obtain a stability index of each digital signal; Step S2, screening out two digital signals with highest stability indexes, marking the two digital signals as stable signals, marking an acquisition channel corresponding to the stable signals as a stable channel, and acquiring a correlation coefficient between the two stable signals; Step S3, when the beam profile detector starts to work, acquiring real-time digital signals of two stable channels in real time, acquiring correlation coefficients between the two real-time digital signals in real time, marking the correlation coefficients as real-time correlation coefficients, and generating a correlation coefficient regression line; in step S1, the process of obtaining the stability index of each digital signal includes: For any acquisition channel, acquiring all digital signals of the acquisition channel under each working environment, placing each digital signal in the same coordinate system, and overlapping starting points, wherein in the coordinate system, each abscissa value is sequentially crossed to form a vertical line parallel to the ordinate axis; Acquiring the highest point of each vertical line, connecting the highest points in sequence by a smooth curve in a coordinate system to obtain an upper boundary curve, acquiring the lowest point of each vertical line, connecting the lowest points in sequence by a smooth curve in a coordinate system to obtain a lower boundary curve, and obtaining the stability index of the acquisition channel according to the upper boundary curve and the lower boundary curve Wherein U (t) represents an expression of the upper boundary curve, D (t) represents an expression of the lower boundary curve, t represents an abscissa value, t 1 represents a 1 st abscissa value, t n represents an nth abscissa value, and n is the total number of abscissa values.
  2. 2. The fault diagnosis method for a beam profile detector control board according to claim 1, wherein in step S1, the working environment includes a plurality of working environment parameters, different working environments refer to different working environment parameters, and the working environment parameters include mechanical vibration intensity and environmental temperature.
  3. 3. The fault diagnosis method for a beam profile detector control board according to claim 1, wherein in step S1, the process of acquiring the digital signal of each acquisition channel includes: And acquiring a synchronous trigger circuit integrated in the beam profile detector, synchronously acquiring data of each acquisition channel under the drive of the same clock source to obtain analog signals of each acquisition channel, and converting the analog signals based on the ADC to obtain digital signals, wherein the parameter setting of data acquisition comprises that the sampling rate is greater than or equal to 1kHz and the resolution is greater than or equal to 16 bits.
  4. 4. The fault diagnosis method for a beam profile detector control board according to claim 1, wherein in step S1, the process of obtaining the highest point and the lowest point of the vertical line includes: For any vertical line, all intersection points of the vertical line and each digital signal are obtained, the intersection point with the lowest ordinate value is marked as the lowest point of the vertical line, and the intersection point with the highest ordinate value is marked as the highest point of the vertical line.
  5. 5. The fault diagnosis method for a beam profile detector control board according to claim 1, wherein in step S2, the process of acquiring the correlation coefficient between two stable signals includes: Under any working environment, respectively acquiring digital signal sequences of two stable signals and respectively marking the digital signal sequences as X= { X 1 ,x 2 ,...,x n } and Y= { Y 1 ,y 2 ,...,y n }, wherein X 1 represents the 1 st sampling point in the digital signal sequence X, and Y 1 represents the 1 st sampling point in the digital signal sequence Y Wherein X i represents the ith sample point in the digital signal sequence X, Y i represents the ith sample point in the digital signal sequence Y, i ε [1, n ] and i is a positive integer; And acquiring all the pearson correlation coefficients of the two stable signals in each working environment, and acquiring the average value of all the pearson correlation coefficients, and recording the average value as the correlation coefficient between the two stable signals.
  6. 6. The fault diagnosis method for a beam profile detector control board according to claim 1, wherein in step S3, the generation process of the correlation coefficient regression line includes: The method comprises the steps of taking a number as an abscissa and a correlation coefficient as an ordinate, establishing a new coordinate system, numbering real-time correlation coefficients between two real-time digital signals obtained in real time, converting each number and the corresponding real-time correlation coefficient into coordinate points of corresponding positions in the new coordinate system, fitting each coordinate point based on a least square method, obtaining regression lines of each coordinate point, and marking the regression lines as correlation coefficient regression lines.
  7. 7. The method according to claim 1, wherein in step S3, if the included angle is smaller than or equal to a preset included angle threshold, the real-time correlation coefficients of the two stable signals are continuously monitored.

Description

Fault diagnosis method for beam profile detector control panel Technical Field The invention relates to the technical field of fault diagnosis, in particular to a fault diagnosis method for a beam profile detector control panel. Background Beam profile detectors are critical diagnostic devices in accelerator units whose control board is responsible for processing weak signals from the detector, whose long-term stability is directly related to the reliability of the beam monitoring data. In actual operation, the control board is subjected to mechanical vibration and thermal cycle stress continuously, so that intermittent faults such as poor contact of the plug-in unit and micro cracks of welding spots are easy to occur. Such faults are transient, highly random and difficult to reproduce and capture in conventional static testing and periodic spot inspection. The existing fault diagnosis scheme mainly has two types of defects, one of the two types of defects is that the existing fault diagnosis scheme is dependent on comparing the current performance with pre-stored health state reference parameters, however, the performance of a control board slowly drifts along with normal aging of components, so that a static reference gradually fails and false alarm is easily caused, and meanwhile, the method cannot be suitable for a new board card or a replacement board card which lacks a unified gold standard due to batch difference. Secondly, the conventional fault diagnosis scheme can interfere the normal operation of the system by injecting test signals and analyzing response, and cannot reflect fault characteristics under the real beam load and complex electromagnetic environment. Therefore, a method for accurately diagnosing intermittent faults in real time without depending on historical health data during online working of a control board is urgently needed in the field, so that the limitation of the prior art is overcome, and the operation and maintenance guarantee level of a beam profile detection system is improved. Disclosure of Invention The invention aims to provide a fault diagnosis method for a beam profile detector control board, which solves the following technical problems. The aim of the invention can be achieved by the following technical scheme: The fault diagnosis method for the beam profile detector control panel comprises the following steps: step S1, acquiring all acquisition channels of a beam profile detector, setting a time window, acquiring digital signals of all the acquisition channels under different working environments in the time window, and comparing all the digital signals to obtain a stability index of each digital signal; Step S2, screening out two digital signals with highest stability indexes, marking the two digital signals as stable signals, marking an acquisition channel corresponding to the stable signals as a stable channel, and acquiring a correlation coefficient between the two stable signals; And step S3, when the beam profile detector starts to work, acquiring real-time digital signals of the two stable channels in real time, acquiring correlation coefficients between the two real-time digital signals in real time, recording the correlation coefficients as real-time correlation coefficients, generating a correlation coefficient regression line, setting a horizontal line, acquiring an included angle between the correlation coefficient regression line and the horizontal line in real time, and if the included angle exceeds a preset included angle threshold value, judging that the beam profile detector has faults. As a further scheme of the invention, the working environment comprises a plurality of working environment parameters, different working environments refer to different working environment parameters, and the working environment parameters comprise mechanical vibration intensity and environment temperature. As a further scheme of the invention, the process of acquiring the digital signals of each acquisition channel comprises the following steps: And acquiring a synchronous trigger circuit integrated in the beam profile detector, synchronously acquiring data of each acquisition channel under the drive of the same clock source to obtain analog signals of each acquisition channel, and converting the analog signals based on the ADC to obtain digital signals, wherein the parameter setting of data acquisition comprises that the sampling rate is greater than or equal to 1kHz and the resolution is greater than or equal to 16 bits. As a further scheme of the invention, the process for obtaining the stability index of each digital signal comprises the following steps: For any acquisition channel, acquiring all digital signals of the acquisition channel under each working environment, placing each digital signal in the same coordinate system, and overlapping starting points, wherein in the coordinate system, each abscissa value is sequentially crossed to form a vertical line