CN-122015914-A - Swing angle tension bridge sensing signal calibration method of aluminum ingot continuous casting machine

CN122015914ACN 122015914 ACN122015914 ACN 122015914ACN-122015914-A

Abstract

The invention discloses a method for calibrating a swing angle tension bridge sensing signal of an aluminum ingot continuous casting machine, which relates to the technical field of sensing signal correction, and comprises the steps of taking the rotation rhythm of a traction wheel of the casting machine as a reference, screening synchronous oscillation components from an original swing angle sensing signal to obtain periodic characteristic components; the method comprises the steps of carrying out dynamic association analysis on the phase track and the amplitude envelope of the periodic characteristic component to obtain a dynamic association relation between the phase track and the amplitude envelope, carrying out active time disturbance on the periodic characteristic component based on the dynamic association relation to obtain the co-variation response strength of the phase track and the amplitude envelope under the disturbance, and carrying out weighting construction on the verified cooperative variation mode between the phase track and the amplitude envelope of the periodic characteristic component based on the co-variation response strength.

Inventors

GUO JIANMIN
WEN JINBAO
CHEN BO
WEN YI
HOU YI
WANG YUN
DU TIANSHU

Assignees

徐州市新东电电工机械有限公司

Dates

Publication Date: 20260512
Application Date: 20260228

Claims (10)

1. A method for calibrating a sensing signal of a swing angle tension bridge of an aluminum ingot continuous casting machine, which is characterized by comprising the following steps: S1, acquiring an output signal of a swing angle tension bridge sensor based on the running state of an aluminum ingot continuous casting machine to obtain an original swing angle sensing signal; S2, screening synchronous oscillation components from an original swing angle sensing signal by taking the rotary rhythm of a traction wheel of the casting machine as a reference to obtain periodic characteristic components; s3, carrying out dynamic association analysis on the phase track and the amplitude envelope of the periodic characteristic component to obtain a dynamic association relation between the phase track and the amplitude envelope; s4, performing active time disturbance on the periodic characteristic component based on the dynamic association relation to obtain the covariant response intensity of the phase track and the amplitude envelope under the disturbance; s5, based on the covariant response intensity, weighting the verified cooperative variation mode between the phase track and the amplitude envelope of the periodic characteristic component to obtain dynamic correction mapping; s6, processing the original swing angle sensing signal through dynamic correction mapping to obtain a calibrated swing angle signal.
2. The method for calibrating a swing angle tension bridge sensing signal of an aluminum ingot continuous casting machine according to claim 1, wherein the method for acquiring the output signal of the swing angle tension bridge sensor based on the operation state of the aluminum ingot continuous casting machine to obtain an original swing angle sensing signal comprises the following steps: based on a pulse signal of a rotary encoder of a traction wheel of the casting machine, analyzing the running period and the phase of the casting machine in real time to obtain a state time sequence identifier synchronous with the traction action; According to the state time sequence identification, synchronous triggering and acquisition are carried out on the output signals of the swing angle tension bridge sensor, and a discrete signal sequence is obtained; And performing unsteady state section identification and steady state section extraction on the discrete signal sequence to obtain an original swing angle sensing signal.
3. The method for calibrating a sensing signal of a swing angle tension bridge of an aluminum ingot continuous casting machine according to claim 1, wherein the step of selecting a synchronous oscillation component from an original swing angle sensing signal by taking a rotation rhythm of a traction wheel of the casting machine as a reference to obtain a periodic characteristic component comprises the steps of: acquiring real-time rotation frequency of the traction wheel as a fundamental frequency, and determining a target analysis frequency band based on the fundamental frequency; in a target analysis frequency band, performing time-frequency conversion on the original swing angle sensing signal to obtain time-frequency energy distribution of the signal; determining the coherence of time-frequency energy distribution and fundamental frequency and harmonic frequency thereof, and generating a synchronous energy spectrum representing the synchronism strength of each period; According to the synchronous energy spectrum, intercepting signal fragments corresponding to a time period with the synchronism intensity exceeding a preset threshold value from an original swing angle sensing signal, and combining to form a synchronous oscillation component; And connecting the synchronous oscillation components in a waveform manner according to the rotation period of the traction wheel to obtain periodic characteristic components.
4. The method for calibrating a sensing signal of a swing angle tension bridge of an aluminum ingot continuous casting machine according to claim 1, wherein the step of performing dynamic correlation analysis on a phase track and an amplitude envelope of the periodic characteristic component to obtain a dynamic correlation between the phase track and the amplitude envelope comprises the steps of: based on the acceleration section of the phase track and the rising edge of the amplitude envelope, overlapping interval identification is carried out on the acceleration section and the rising edge of the amplitude envelope on a time window, and a cooperative oscillation interval is obtained; Tracking the appearance sequence of the phase track angular velocity extremum and the amplitude envelope change rate extremum based on the cooperative oscillation interval to obtain a dominant sequence relation; And constructing a cooperative mode of the phase track and the amplitude envelope based on the relationship between the cooperative oscillation interval and the dominant order, so as to obtain a primary dynamic association relationship.
5. The method for calibrating a sensing signal of a swing angle tension bridge of an aluminum ingot continuous casting machine according to claim 4, wherein the obtaining a dynamic association relationship between a phase trajectory and an amplitude envelope further comprises: performing stability evaluation on the duration time of the collaborative oscillation interval in different traction wheel rotation periods to obtain a steady-state collaborative region and a transient collaborative region; carrying out repeatability analysis on the dominant order relationship in a steady-state coordination area and a transient coordination area to obtain a weight factor; And weighting the primary dynamic association relation based on the weight factors to obtain a weighted dynamic association relation, and taking the weighted dynamic association relation as a dynamic association relation.
6. The method for calibrating a swing angle tension bridge sensing signal of an aluminum ingot continuous casting machine according to claim 1, wherein the method for actively perturbing the periodic characteristic component based on the dynamic association relationship to obtain the co-variation response strength of the phase track and the amplitude envelope under the perturbation comprises the following steps: Based on the dominant order relation in the dynamic association relation, identifying a key time sequence point in which the phase track leads the amplitude envelope or the amplitude envelope leads the phase track in the periodic characteristic component; Applying a time sequence offset reverse to the dominant order relation to the key time sequence points to obtain a disturbance post-component of time sequence reversal; Observing the sequence self-recovery process of the phase track and the amplitude envelope in the disturbed component to obtain the trend and the speed measurement of the convergence of the phase track and the amplitude envelope to the dominant sequence relation; Based on the convergence trend and the speed, quantifying the stability measurement of the dynamic association relationship under the time sequence reversal pressure, and obtaining the co-transformation response intensity.
7. The method for calibrating a sensing signal of a swing angle tension bridge of an aluminum ingot continuous casting machine according to claim 6, wherein the applying a timing offset reverse to a dominant order relationship to the critical timing point to obtain a post-disturbance component of the timing reversal comprises: Dividing the key time sequence points into a high weight time sequence point subset and a low weight time sequence point subset based on weight factors associated with the key time sequence points in the dynamic association relation; Applying a first time sequence offset mode which is completely reverse to the dominant order relation to the high-weight time sequence point subset, and applying a second time sequence offset mode which is partially reverse to the dominant order relation to the low-weight time sequence point subset to obtain an offset scheme of partition modulation; and executing time sequence offset on the periodic characteristic component according to the offset scheme of the partition modulation to obtain a disturbed component with reversed time sequence.
8. The method for calibrating a sensing signal of a swing angle tension bridge of an aluminum ingot continuous casting machine according to claim 6, wherein the weighting structure is performed on the verified cooperative variation pattern between the phase track and the amplitude envelope of the periodic characteristic component based on the common-variation response intensity to obtain a dynamic correction map, and the method comprises the following steps: based on the comparison result of the time sequence verification intensity and the partition response in the covariant response intensity, extracting a target mode characteristic set which remains stable under disturbance from the cooperative change mode; based on the covariant response intensity, carrying out weight distribution on the stability contribution degree of different features in the target mode feature set to obtain a weighted mode rule; And carrying out structural coding on the correction relation between the phase track and the amplitude envelope according to the weighting mode rule to obtain dynamic correction mapping.
9. The method for calibrating a sensing signal of a swing angle tension bridge of an aluminum ingot continuous casting machine according to claim 8, wherein the weight distribution is performed on the stability contribution degrees of different characteristics in a target mode characteristic set based on the common-transformation response intensity to obtain a weighted mode rule, and the method comprises the following steps: Dividing the features into a steady-state feature subset and a transient feature subset according to steady-state collaborative region attributes or transient collaborative region attributes corresponding to the target mode feature set in the partition response comparison result; Distributing basic reconstruction weights to the steady-state feature subsets according to the time sequence verification intensity, and distributing self-adaptive attenuation weights to the transient feature subsets according to response divergence characteristics of the transient feature subsets to obtain a differential weight distribution scheme; And based on the differential weight distribution scheme, regularized organization is carried out on the target mode feature set to form a weighted mode rule.
10. The method for calibrating a swing angle tension bridge sensing signal of an aluminum ingot continuous casting machine according to claim 1, wherein the processing the original swing angle sensing signal through dynamic correction mapping to obtain a calibrated swing angle signal comprises: Based on the correction relation of the codes in the dynamic correction mapping, performing characteristic decoupling and relation correction on the signal section matched with the mapping rule in the original swing angle sensing signal to obtain a preliminary correction signal section; performing transition smooth connection between the feature points which are corrected according to the mapping rule in the preliminary correction signal segment and adjacent uncorrected feature points to obtain a continuous correction signal of natural transition; And carrying out amplitude normalization and time sequence alignment on the continuous correction signal to resynchronize the continuous correction signal with the rotating rhythm of the traction wheel of the casting machine, thereby obtaining a corrected swing angle signal.

Description

Swing angle tension bridge sensing signal calibration method of aluminum ingot continuous casting machine Technical Field The invention relates to the technical field of sensor signal correction, in particular to a method for calibrating a sensor signal of a swing angle tension bridge of an aluminum ingot continuous casting machine. Background The swing angle tension bridge sensing signal of the aluminum ingot continuous casting machine is core data reflecting the running state of equipment and the stability of a casting process, the accuracy of the swing angle tension bridge sensing signal directly influences the quality control of products, and the traditional signal calibration method is mostly dependent on a fixed rule processing mode, but in the aluminum ingot casting process, the change of working conditions such as fine adjustment of casting speed, fluctuation of aluminum liquid supply flow and the like can directly lead to dynamic adjustment of the rotation rhythm of a traction wheel, so that the periodic characteristic and phase-amplitude collaborative mode of the swing angle sensing signal evolve in real time. The traditional fixed rule processing mode cannot adjust the separation and calibration logic along with the dynamic evolution process, so that not only is effective signal components synchronous with the equipment operation rhythm difficult to accurately separate from original signals with mixed interference, but also the dynamic variation signal deviation cannot be calibrated in a targeted manner, and finally, the accuracy and the calibration precision of the signal separation are difficult to meet the actual production requirements. Disclosure of Invention The invention provides a method for calibrating a sensing signal of a swing angle tension bridge of an aluminum ingot continuous casting machine, which aims to solve the problems in the background technology. In order to achieve the above purpose, the invention provides a method for calibrating a sensing signal of a swing angle tension bridge of an aluminum ingot continuous casting machine, which comprises the following steps: S1, acquiring an output signal of a swing angle tension bridge sensor based on the running state of an aluminum ingot continuous casting machine to obtain an original swing angle sensing signal; S2, screening synchronous oscillation components from an original swing angle sensing signal by taking the rotary rhythm of a traction wheel of the casting machine as a reference to obtain periodic characteristic components; s3, carrying out dynamic association analysis on the phase track and the amplitude envelope of the periodic characteristic component to obtain a dynamic association relation between the phase track and the amplitude envelope; s4, performing active time disturbance on the periodic characteristic component based on the dynamic association relation to obtain the covariant response intensity of the phase track and the amplitude envelope under the disturbance; s5, based on the covariant response intensity, weighting the verified cooperative variation mode between the phase track and the amplitude envelope of the periodic characteristic component to obtain dynamic correction mapping; s6, processing the original swing angle sensing signal through dynamic correction mapping to obtain a calibrated swing angle signal. Preferably, based on the running state of the aluminum ingot continuous casting machine, the method collects the output signal of the swing angle tension bridge sensor to obtain an original swing angle sensing signal, and includes: based on a pulse signal of a rotary encoder of a traction wheel of the casting machine, analyzing the running period and the phase of the casting machine in real time to obtain a state time sequence identifier synchronous with the traction action; According to the state time sequence identification, synchronous triggering and acquisition are carried out on the output signals of the swing angle tension bridge sensor, and a discrete signal sequence is obtained; And performing unsteady state section identification and steady state section extraction on the discrete signal sequence to obtain an original swing angle sensing signal. Preferably, the step of screening the synchronous oscillation component from the original swing angle sensing signal by taking the rotation rhythm of the traction wheel of the casting machine as a reference to obtain a periodic characteristic component comprises the following steps: acquiring real-time rotation frequency of the traction wheel as a fundamental frequency, and determining a target analysis frequency band based on the fundamental frequency; in a target analysis frequency band, performing time-frequency conversion on the original swing angle sensing signal to obtain time-frequency energy distribution of the signal; determining the coherence of time-frequency energy distribution and fundamental frequency and harmonic frequency thereof, a