CN110646515A - Optical device damage detection method and device, electronic equipment and readable storage medium - Google Patents
Optical device damage detection method and device, electronic equipment and readable storage medium Download PDFInfo
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Abstract
The application provides an optical device damage detection method, an optical device damage detection device, an electronic device and a readable storage medium. Therefore, by utilizing the characteristic that the element can generate an acoustic transmission signal in the operation process when physical damage exists, the damage type and the damage degree of the light-to-be-detected device are determined by acquiring and processing the acoustic transmission signal. Compared with the related art, the optical device does not need to be disassembled, the limiting condition is less, and the detection efficiency is higher.
Description
Technical Field
The present disclosure relates to the field of optical technologies, and in particular, to a method and an apparatus for detecting damage to an optical device, an electronic device, and a readable storage medium.
Background
In the application process of the optical device, the optical device can be damaged to a certain extent due to factors such as initial defects of the optical device, the use environment and the like, so that the performance of the optical device is seriously influenced. The detection of damage to the optical device therefore plays a crucial role in the optical field.
At present, the damage detection method of the optical device mainly comprises the following steps: before the optical device is installed in the system or after the optical device is detached from the system, the optical device is fixed on a specific clamping device and is detected in a mode of acquiring damage images through manual vision or computer vision. This method requires frequent handling of the optical device, which results in low detection efficiency and more restrictions.
Disclosure of Invention
An embodiment of the present application provides a method and an apparatus for detecting damage to an optical device, an electronic device, and a readable storage medium, so as to solve the problems of low detection efficiency and more limitations of the related art.
The embodiment of the application provides a method for detecting damage of an optical device, which comprises the following steps: acquiring an acoustic propagation signal generated when a device to be measured operates; processing the acoustic propagation signal to obtain characteristic parameters of the acoustic propagation signal; determining the type, the strength and the activity of an acoustic propagation signal source in the optical device to be tested based on the characteristic parameters; and determining the damage type and the damage degree of the optical device to be detected based on the type, the strength and the activity of the acoustic propagation signal source.
In the implementation process, the acoustic propagation signal generated when the optical device to be tested operates is acquired and processed to obtain the characteristic parameters of the acoustic propagation signal, the type, the strength and the activity of the acoustic propagation signal source in the optical device to be tested are determined based on the characteristic parameters, and finally the damage type and the damage degree of the optical device to be tested are determined based on the type, the strength and the activity of the acoustic propagation signal source. Therefore, by utilizing the characteristic that the element can generate an acoustic transmission signal in the operation process when physical damage exists, the damage type and the damage degree of the light-to-be-detected device are determined by acquiring and processing the acoustic transmission signal. Compared with the related art, the optical device does not need to be disassembled, the limiting condition is less, and the detection efficiency is higher.
Further, the processing the acoustic propagation signal to obtain the characteristic parameter of the acoustic propagation signal includes: processing the acoustic propagation signal to obtain a time domain waveform and a frequency spectrum of the acoustic propagation signal; and determining the characteristic parameters of the acoustic propagation signals based on the time domain waveform and the frequency spectrum of the acoustic propagation signals.
In the implementation process, the time domain waveform and the frequency spectrum of the acoustic propagation signal are obtained by processing the acoustic propagation signal, and then the characteristic parameters of the acoustic propagation signal are determined based on the time domain waveform and the frequency spectrum of the acoustic propagation signal. The determined characteristic parameters of the acoustic propagation signals are related to the time domain waveform and the frequency spectrum of the acoustic propagation signals, so that the characteristic information of the acoustic propagation signals can be effectively embodied, and the accuracy of detecting the damage of the optical device to be detected is improved.
Further, the characteristic parameter includes a time-domain waveform of the acoustic propagation signal, and determining the type of the acoustic propagation signal source in the optical device to be tested based on the characteristic parameter includes: when the time domain waveform is continuous, determining the type of the sound propagation signal source to be a continuous sound propagation signal source; and when the time domain waveform is discontinuous, determining the type of the sound propagation signal source as a burst type sound propagation signal source.
In practical applications, the inventors have found that, for a continuous type acoustic propagation signal source, the waveform of the generated acoustic propagation signal is continuous, while the waveform of the generated acoustic propagation signal is discontinuous. The implementation process is based on the type judgment, and the implementation method is simple, reliable in result and high in practical application value.
Further, the characteristic parameter includes the event number of the acoustic propagation signal, and determining the activity of the acoustic propagation signal source in the optical device to be tested based on the characteristic parameter includes: and determining the activity of the sound propagation signal source according to the corresponding relation between the preset change condition of the number of the events and the activity of the sound propagation signal source and the obtained number of the events of the sound propagation signal.
In the implementation process, the activity of the sound propagation signal source is determined according to the number of the events of the sound propagation signal and the corresponding relation between the preset number of the events and the activity of the sound propagation signal source, the detection national standard requirement of the sound propagation signal is met, and the detection result has better accuracy.
Further, the characteristic parameter includes energy of the acoustic propagation signal, and determining the intensity of the acoustic propagation signal source in the optical device to be tested based on the characteristic parameter includes: and determining the strength of the acoustic propagation signal source according to the obtained energy of the acoustic propagation signal and the corresponding relation between the preset energy and the strength of the acoustic propagation signal source.
In practical applications, the greater the energy of the acoustically propagated signal, the higher the intensity. In the implementation process, the strength of the acoustic propagation signal source is determined based on the energy of the acoustic propagation signal, the implementation is simple, the result is reliable, and the method has good practical application value.
Further, the characteristic parameter includes an amplitude of the acoustic propagation signal, and determining the intensity of the acoustic propagation signal source in the optical device to be tested based on the characteristic parameter includes: and determining the strength of the acoustic propagation signal source according to the obtained amplitude of the acoustic propagation signal and the corresponding relation between the preset amplitude and the strength of the acoustic propagation signal source.
In practical applications, generally, the larger the amplitude of the acoustically propagated signal, the higher the intensity of the acoustically propagated signal. Therefore, in the implementation process, the strength of the acoustic propagation signal source is determined based on the amplitude of the acoustic propagation signal, the implementation is simple, the result is reliable, and the method has good practical application value.
Further, the determining the damage type and the damage degree of the optical device to be tested based on the type, the strength, and the activity of the acoustic propagation signal source includes: determining the damage type of the optical device to be tested based on the type of the acoustic propagation signal source and the preset corresponding relation between the type of the acoustic propagation signal source and the damage type; and determining the damage degree of the optical device to be tested based on the strength and the activity of the acoustic propagation signal source and the corresponding relation of the preset strength, activity and damage degree.
In the practical application process, different types of damage can cause different types of sound propagation signal sources, and the strength and activity of the sound propagation signal sources can reflect the damage degree of the device. In the implementation process, the damage type of the optical device to be tested is determined based on the type of the acoustic propagation signal source, the damage degree of the optical device to be tested is determined based on the strength and activity of the acoustic propagation signal source, the whole process is very simple to implement, and the reliability is high, so that the method has good practical application value.
Further, the acquiring the acoustic propagation signal generated when the optical device under test operates includes: acquiring acoustic propagation signals generated when the optical device to be detected runs through at least four sensors preset on the optical device to be detected; the optical device damage detection method further comprises: after acoustic propagation signals generated when the optical device to be measured runs are acquired through at least four sensors preset on the optical device to be measured, the coordinate position of an acoustic propagation signal source in the optical device to be measured is determined based on the coordinate position of each sensor and the time difference of each sensor receiving the acoustic propagation signals.
In the process, the generation position of the signal can be calculated based on at least four known positions and the time difference of the same signal reaching different positions, so that an engineer can accurately position the coordinates of the damage position of the element, and the later repair and other operations are facilitated.
The embodiment of the present application further provides an optical device damage detection device, including: the device comprises an acquisition module and a processing module; the acquisition module is used for acquiring an acoustic propagation signal generated when the optical device to be detected operates; the processing module is used for processing the acoustic propagation signal to obtain a characteristic parameter of the acoustic propagation signal, determining the type, the strength and the activity of an acoustic propagation signal source in the optical device to be tested based on the characteristic parameter, and determining the damage type and the damage degree of the optical device to be tested based on the type, the strength and the activity of the acoustic propagation signal source.
In the implementation process, the acoustic propagation signal generated when the optical device to be tested operates is acquired and processed to obtain the characteristic parameters of the acoustic propagation signal, the type, the strength and the activity of the acoustic propagation signal source in the optical device to be tested are determined based on the characteristic parameters, and finally the damage type and the damage degree of the optical device to be tested are determined based on the type, the strength and the activity of the acoustic propagation signal source. Therefore, by utilizing the characteristic that the element can generate an acoustic transmission signal in the operation process when physical damage exists, the damage type and the damage degree of the light-to-be-detected device are determined by acquiring and processing the acoustic transmission signal. Compared with the related art, the optical device does not need to be disassembled, the limiting condition is less, and the detection efficiency is higher.
The embodiment of the application also provides electronic equipment, which comprises a processor, a memory, a communication bus and a sensor; the communication bus is used for realizing connection communication among the processor, the memory and the sensor; the sensor is used for being arranged on the device to be measured so as to obtain an acoustic propagation signal generated by the device to be measured during operation and transmit the acoustic propagation signal to the processor through the communication bus; the processor is configured to execute one or more programs stored in the memory to implement any of the above-described optical device damage detection methods.
The embodiment of the present application further provides a readable storage medium, where one or more programs are stored, and the one or more programs are executable by one or more processors to implement any one of the above-mentioned optical device damage detection methods.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic flowchart of a method for detecting damage to an optical device according to an embodiment of the present disclosure;
fig. 2 is a schematic view illustrating a damage detection of a laser device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of an optical device damage detection apparatus according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
The first embodiment is as follows:
in order to solve the problems of low detection efficiency and more limiting conditions of the related technology, the embodiment of the application provides the optical device damage detection method, so that the online detection of the damage of the to-be-detected optical device is realized based on the characteristic that the to-be-detected optical device can generate acoustic emission when being damaged. As shown in fig. 1, the method for detecting damage to an optical device provided in the embodiment of the present application includes:
s101: and acquiring an acoustic propagation signal generated when the device to be measured operates.
In the embodiment of the present application, a sensor (such as an acoustic emission sensor) for acquiring an acoustic propagation signal may be arranged on the optical device to be measured, so as to acquire the acoustic propagation signal generated when the optical device to be measured operates. In order to improve the effectiveness of acquiring the acoustic propagation signal, an acoustic coupling agent can be coated on the contact position of the sensor and the optical device to be measured so as to reduce the energy loss of the acoustic propagation signal at the contact surface of the sensor.
It should be noted that the acoustic propagation signal described in the embodiments of the present application is an ultra-high frequency stress wave pulse signal generated at a damaged position when the optical device is damaged and excited, and in some documents, the acoustic propagation signal is also referred to as an acoustic emission signal. In the embodiments of the present application, the location where the acoustic propagation signal is generated (i.e., the damage location of the optical device) is referred to as an acoustic propagation signal source.
In the embodiment of the present application, in order to ensure that the acoustic propagation signal can be effectively processed, after the acoustic propagation signal is collected by the sensor, the acoustic propagation signal may be amplified first, and then the operation of the embodiment of the present application is performed.
In the embodiment of the present application, the optical device under test may be any element in an optical system, such as a laser. In the embodiments of the present application, the optical devices are classified into two types, the first type is a device (such as a laser, etc.) which can generate excitation by itself, and the second type is a device (such as an optical lens, etc.) which cannot generate excitation by itself. For the first type of device, the device to be tested can be started and used to generate excitation through its own excitation source (such as a power supply) so as to operate the device to be tested. For the second type of device, the optical device under test needs to be excited from the outside (such as an external load, an external magnetic field, etc.), so that the optical device under test can operate. It is noted that in practical applications, the first type of device may also be used to operate the optical device under test in the form of an externally applied stimulus.
S102: and processing the sound propagation signals to obtain the characteristic parameters of the sound propagation signals.
In embodiments of the present application, the characteristic parameters of the acoustically propagated signal may include one or more of ringing count, event number, energy, amplitude, time domain waveform, and the like.
In the embodiment of the present application, the acoustic propagation signal may be processed to obtain a time-domain waveform and a frequency spectrum of the acoustic propagation signal. And then determining the characteristic parameters of the sound propagation signals based on the time domain waveform and the frequency spectrum of the sound propagation signals. It should be noted that, when the acoustic propagation signal is acquired, the time domain waveform of the acoustic propagation signal may be directly obtained and displayed by an oscilloscope or other equipment. And the frequency spectrum of the acoustic propagation signal can be obtained by performing Fourier transform on the time domain waveform.
In the embodiment of the application, characteristic parameters such as event number and ringing count can be determined according to the time domain waveform. For example, the envelope of the time-domain waveform of the acoustically propagated signal may be detected, and an event may be considered to occur when the envelope of the waveform exceeds a predetermined threshold voltage for a predetermined time. The total number of events detected during the acoustic emission process is the event number. Illustratively, a threshold voltage may be set, and the number of pulses in the waveform that exceed the threshold voltage is the ringing count. And the characteristic parameters of the acoustic propagation signal such as energy, amplitude and the like can be determined according to the frequency spectrum of the acoustic propagation signal.
S103: and determining the type, the strength and the activity of the acoustic propagation signal source in the optical device to be tested based on the characteristic parameters.
It should be noted that the acoustic propagation signal source described in the embodiment of the present application is a position where damage occurs in the optical device under test to generate an acoustic propagation signal.
In the embodiment of the present application, the type of the acoustic propagation signal source in the optical device under test may be determined according to the time domain waveform of the acoustic propagation signal. Illustratively, it may be determined whether the time-domain waveform of the acoustically propagated signal is continuous. If the time domain waveform is continuous, determining that the type of the sound propagation signal source is a continuous sound propagation signal source; if the time domain waveform is discontinuous, the type of the acoustic propagation signal source can be determined to be a burst type acoustic propagation signal source.
In the embodiment of the present application, the activity of the acoustic propagation signal source in the optical device under test may also be determined according to the event number of the acoustic propagation signal. For example, the activity of the sound propagation signal source may be determined according to a corresponding relationship between a preset change condition of the number of events and the activity of the sound propagation signal source, and the obtained number of events of the sound propagation signal. For example, when the acceleration rate of the event number of the acoustic propagation signal is greater than the preset high-activity acceleration rate in the process from the start of operation to the time when the optical device to be tested is in the stable state, the activity of the acoustic propagation signal source is determined to be high activity; when the acceleration rate of the event number of the acoustic propagation signal is greater than the preset medium activity acceleration rate and less than or equal to the preset high activity acceleration rate in the process from the beginning of operation to the keeping of the stable state of the optical device to be tested, determining the activity of the acoustic propagation signal source as the medium activity; otherwise, the activity of the acoustic propagation signal source is determined to be low activity. It should be noted that specific values of the preset high-activity acceleration rate and the preset medium-activity acceleration rate may be set by engineers according to actual needs.
In the embodiment of the present application, the strength of the acoustic propagation signal source may also be determined according to the magnitude of the energy or amplitude of the acoustic propagation signal. For example, the strength of the acoustic propagation signal source may be determined according to the obtained energy of the acoustic propagation signal and a preset correspondence between the energy and the strength of the acoustic propagation signal source, for example: the energy average value can be obtained from the obtained energy of the acoustic propagation signal by taking the first N maximum energies, and the intensity of the acoustic propagation signal source is determined to be high intensity when the energy average value is greater than a preset high intensity energy threshold value according to the obtained energy average value and the corresponding relation between the preset energy and the intensity of the acoustic propagation signal source; when the energy average value is smaller than a preset medium intensity energy threshold value, determining the intensity of the sound propagation signal source to be low intensity; and when the energy average value is greater than or equal to the medium-intensity energy threshold and less than or equal to the high-intensity energy threshold, determining the intensity of the sound propagation signal source to be medium intensity. For example, the strength of the acoustic propagation signal source may be determined according to the obtained amplitude of the acoustic propagation signal and a preset corresponding relationship between the amplitude and the strength of the acoustic propagation signal source, for example: the amplitude average value can be calculated by taking the first M maximum amplitudes from the obtained amplitudes of the acoustic propagation signals, and the intensity of the acoustic propagation signal source is determined to be high intensity when the amplitude average value is greater than a high intensity amplitude threshold value according to the amplitude average value and the corresponding relation between the preset amplitude and the intensity of the acoustic propagation signal source; when the amplitude average value is smaller than the medium intensity amplitude threshold value, determining the intensity of the sound propagation signal source to be low intensity; and when the amplitude average value is greater than or equal to the medium intensity amplitude threshold value and less than or equal to the high intensity amplitude threshold value, determining the intensity of the sound propagation signal source to be medium intensity. It should be noted that specific values of N, M, the high intensity energy threshold, the medium intensity energy threshold, the high intensity amplitude threshold, and the medium intensity amplitude threshold may be set by engineers according to actual needs.
S104: and determining the damage type and the damage degree of the optical device to be detected based on the type, the strength and the activity of the acoustic propagation signal source.
In the embodiment of the application, the damage type of the optical device to be tested can be determined based on the type of the acoustic propagation signal source and the preset corresponding relation between the type of the acoustic propagation signal source and the damage type; and determining the damage degree of the optical device to be detected based on the strength and the activity of the acoustic propagation signal source and the corresponding relation of the preset strength, activity and damage degree.
Exemplarily, when the type of the acoustic propagation signal source is a continuous acoustic propagation signal source, the damage type of the optical device to be measured can be determined to be plastic deformation, thermal melting and the like; when the type of the acoustic propagation signal source is a burst-type acoustic propagation signal source, the damage type of the optical device to be measured can be determined to be crack, optical breakdown and the like.
For example, the damage degree of the optical device to be measured may be divided into K (K is a preset integer greater than or equal to 1) classes in sequence from light to high, and corresponding intensity and activity levels are preset for each class. For example, it may be assumed that the damage degrees of the optical device to be measured are sequentially divided into 3 classes from light to high, and the 3 classes are respectively recorded from light to high as class 1, class 2, and class 3, and when the intensity of the acoustic propagation signal source is high intensity and/or the activity of the acoustic propagation signal source is high activity, the damage degree of the optical device to be measured is determined to be the 3 rd class damage degree; when the intensity of the sound propagation signal source is low and the activity of the sound propagation signal source is low, determining the damage degree of the optical device to be tested as the 1 st type damage degree; and otherwise, determining the damage degree of the to-be-detected optical device as the 2 nd type damage degree.
In this application embodiment, can confirm whether need remind the user to treat the optical device to change or maintain according to the damage degree of the optical device that awaits measuring after determining the damage degree of the optical device that awaits measuring. For example, in the above example, if the damage degree of the optical device to be tested is the 3 rd damage degree, it indicates that the damage degree of the optical device to be tested is relatively heavy, and the user may be prompted to replace the optical device. If the damage degree of the optical device to be tested is the 2 nd type damage degree, the damage degree of the optical device to be tested is general, and a user can be reminded of maintaining the optical device, such as film coating and the like. If the damage degree of the optical device to be detected is the 1 st type damage degree, the damage degree of the optical device to be detected is relatively low, and a user can be reminded of performing maintenance operation on the optical device or not.
In the embodiment of the present application, in order to facilitate a user to know a damage position, at least four sensors may be used to acquire an acoustic propagation signal generated when the optical device to be measured operates. At this time, since there may be a difference in the time when the signal sent by the same sound propagation signal source reaches different positions, the time when the sensor disposed at different positions of the device to be measured receives the signal sent by the same sound propagation signal source may be different. Therefore, the position of the sound propagation signal source can be calculated based on the position of each sensor and the time difference of the sensors receiving the signals emitted by the same sound propagation signal source. Taking the case where four sensors are provided as an example, the coordinate values of the respective sensors are recorded when the sensors are provided. The coordinate values of the four sensors recorded are (x1, y1, z1), (x2, y2, z2), (x3, y3, z3), (x4, y4, z4), and Δ t1Is the time difference between the sensor at (x1, y1, z1) and the sensor at (x2, y2, z2) in receiving the signal from the same sound propagation signal source, Δ t2The sensor at (x1, y1, z1) and the sensor at (x3, y3, z3) receive the same sound propagation signal source to send outTime difference of the signals of (1), Δ t3Is the time difference between the sensor at (x1, y1, z1) and the sensor at (x4, y4, z4) receiving the signal from the same source of acoustic propagation signals. The propagation speed of the acoustic propagation signal in the optical device to be measured is v, (x, y, z) is the coordinate of the acoustic propagation signal source to be solved, and the following equation set can be constructed:
and solving the equation set, and taking a set of solutions of which x, y and z are all more than or equal to 0 as the coordinates of the sound propagation signal source.
It should be noted that, in the embodiment of the present application, when the user is reminded, the location of the sound propagation signal source and the type of the sound propagation signal source may be displayed to the user, so that the user can perform subjective analysis to determine whether to replace the optical device.
It should be noted that, in the embodiment of the present application, if the acoustic propagation signal is not acquired, it may be considered that the optical device to be tested is not damaged.
To sum up, the optical device damage detection method provided in the embodiment of the present application obtains the acoustic propagation signal generated when the optical device to be detected operates, processes the acoustic propagation signal to obtain the characteristic parameter of the acoustic propagation signal, determines the type, the intensity, and the activity of the acoustic propagation signal source in the optical device to be detected based on the characteristic parameter, and determines the damage type and the damage degree of the optical device to be detected based on the type, the intensity, and the activity of the acoustic propagation signal source. Therefore, by utilizing the characteristic that the element can generate an acoustic transmission signal in the operation process when physical damage exists, the damage type and the damage degree of the light-to-be-detected device are determined by acquiring and processing the acoustic transmission signal. Compared with the related art, the optical device does not need to be disassembled, the limiting condition is less, and the detection efficiency is higher.
Example two:
in this embodiment, on the basis of the first embodiment, a process of performing online damage detection on a laser device is taken as an example to further illustrate the present application.
Referring to fig. 2, a sensor 22 is disposed on each of the left, right, front, rear, and lower surfaces of a laser device 21, and an acoustic coupling agent is applied to the contact surface between the sensor and the laser device to ensure good transmission of an acoustic propagation signal.
And calibrating the detection equipment 23, judging whether the calibration of the detection equipment is normal and whether the response amplitude of each channel sensor meets the standard requirement, and adjusting the part of the detection equipment which does not meet the standard requirement.
And operating the laser device, and acquiring an acoustic propagation signal generated when the laser device is damaged in real time by using the sensor. And displaying the time domain waveform of the collected sound propagation signal, and performing Fast Fourier Transform (FFT) processing on the time domain waveform of the sound propagation signal to obtain the frequency spectrum of the sound propagation signal.
The number of events of the acoustic propagation signal is extracted from the time-domain waveform of the acoustic propagation signal, and the energy of the acoustic propagation signal is extracted from the frequency spectrum of the acoustic propagation signal. In this embodiment of the present application, the detection device may display the obtained time domain waveform, the event number of the acoustic propagation signal, and the energy, so as to be known by the user.
Determining the position of an acoustic propagation signal source by using a three-dimensional positioning method, specifically, solving a spatial position coordinate (x, y, z) of the acoustic propagation signal source according to the propagation velocity v of an acoustic propagation signal in an optical device material to be detected and the time difference of signals received by each sensor, wherein the equation is as follows:
wherein, (x1, y1, z1), (x2, y2, z2), (x3, y3, z3), (x4, y4, z4), (x5, y5, z5) are coordinates of 5 sensors, respectively, Δ t1Is the time difference between the sensor at (x1, y1, z1) and the sensor at (x2, y2, z2) in receiving the signal from the same sound propagation signal source, Δ t2Is the time difference between the sensor at (x1, y1, z1) and the sensor at (x3, y3, z3) in receiving the signal from the same sound propagation signal source, Δ t3Is the time difference between the sensor at (x1, y1, z1) and the sensor at (x4, y4, z4) in receiving the signal from the same sound propagation signal source, Δ t4Is the time difference between the sensor at (x1, y1, z1) and the sensor at (x5, y5, z5) receiving the signal from the same source of acoustic propagation signals.
Judging the type of the sound propagation signal source according to the waveform characteristics of the sound propagation signal, wherein the specific corresponding relationship is shown in the following table I:
watch 1
| Wave form characteristics | Type of source of acoustic propagation signals |
| Continuously distributed | Continuous acoustic propagation signal source |
| Non-continuous distribution | Burst type sound propagation signal source |
And determining the activity of the sound propagation signal source according to the acceleration of the number of events in the process from the beginning of operation to the stable state maintenance of the optical device to be tested. Specifically, when the acceleration rate of the event number is larger than the preset high-activity acceleration rate, determining that the sound propagation signal source has high activity; when the acceleration of the number of events is larger than the acceleration of the preset middle activity and smaller than or equal to the acceleration of the preset high activity in the process from the beginning of running to the keeping of the stable state of the optical device to be tested, determining that the sound propagation signal source is the middle activity; otherwise, the acoustic propagation signal source is determined to be low activity.
Judging the source intensity of the sound propagation signal according to the energy of the sound propagation signal, and taking the average value of the first 5 maximum energies to determine the intensity of the sound propagation signal source, wherein the specific corresponding relationship is shown in the following table two:
watch two
| Intensity level of a source of an acoustic propagation signal | Intensity Q of acoustic propagation signal source |
| Low strength | Q<a |
| Medium strength | a≤Q≤b |
| High strength | Q>b |
Wherein b and a are respectively a preset high intensity energy threshold and a middle intensity energy threshold.
And determining the damage type of the laser device according to the third table and determining the damage degree of the laser device according to the fourth table.
Watch III
| Type of source of acoustic propagation signals | Type of damage to optical device |
| Continuous acoustic propagation signal source | Plastic deformation, heat fusion, etc |
| Burst type sound propagation signal source | Cracks, optical breakdown, etc |
Watch four
Wherein, I and II level damage show that laser device damage degree is lighter, can not change, only need to carry out appropriate adjustment (such as coating film etc.). III/IV grade damage shows that the laser device is relatively heavy in damage degree and needs to be replaced in time.
The embodiment of the application realizes nondestructive detection on the damage of the laser device in the operation process of the laser device by using the acoustic propagation signal, avoids operations such as disassembly, assembly and readjustment of the laser device, realizes real-time monitoring of the laser device, diagnoses the damage type and the damage degree of the laser device timely and reliably, evaluates the service life of the laser device, and judges whether the laser device needs to be replaced. Meanwhile, the detection result has certain foresight, and an engineer can predict the development trend of the damage according to the measured characteristic parameters, the damage position, the damage type and the damage degree, so that the method has certain early warning capability.
Example three:
based on the same inventive concept, the embodiment of the present application also provides an optical device damage detection apparatus 100. Referring to fig. 3, fig. 3 shows an optical device damage detection apparatus corresponding to the method steps shown in fig. 1. It should be understood that the apparatus 100 may perform the various steps involved in the method of fig. 1 described above; the specific functions of the apparatus 100 can be referred to the above description, and the detailed description is appropriately omitted here to avoid redundancy. The device 100 includes at least one software functional module that can be stored in memory in the form of software or firmware or solidified in the operating system of the device 100. Specifically, the method comprises the following steps:
referring to fig. 3, the apparatus 100 includes: an acquisition module 101 and a processing module 102. Wherein:
the obtaining module 101 is configured to obtain an acoustic propagation signal generated when the optical device to be detected operates;
the processing module 102 is configured to process the acoustic propagation signal to obtain a characteristic parameter of the acoustic propagation signal, determine the type, the intensity, and the activity of the acoustic propagation signal source in the optical device to be detected based on the characteristic parameter, and determine the damage type and the damage degree of the optical device to be detected based on the type, the intensity, and the activity of the acoustic propagation signal source.
In a feasible implementation manner of the embodiment of the present application, the processing module 102 is specifically configured to process an acoustic propagation signal to obtain a time-domain waveform and a frequency spectrum of the acoustic propagation signal; the characteristic parameters of the acoustic propagation signal are determined based on the time domain waveform and the frequency spectrum of the acoustic propagation signal.
In a possible implementation manner of the embodiment of the present application, the characteristic parameter includes a time-domain waveform of the acoustic propagation signal; the processing module 102 is specifically configured to determine that the type of the acoustic propagation signal source is a continuous acoustic propagation signal source when the time domain waveform is continuous; and when the time domain waveform is discontinuous, determining the type of the sound propagation signal source as a burst type sound propagation signal source.
In a possible implementation of the embodiment of the present application, the characteristic parameter includes the number of events of the acoustic propagation signal; the processing module 102 is specifically configured to determine the activity of the sound propagation signal source according to a corresponding relationship between a preset change condition of the number of events and the activity of the sound propagation signal source and the obtained number of events of the sound propagation signal.
In a possible implementation of the embodiment of the present application, the characteristic parameter includes an energy of the acoustic propagation signal; the processing module 102 is specifically configured to determine the strength of the acoustic propagation signal source according to the obtained energy of the acoustic propagation signal and a corresponding relationship between preset energy and the strength of the acoustic propagation signal source.
In a possible implementation of the embodiment of the present application, the characteristic parameter includes an amplitude of the acoustic propagation signal; the processing module 102 is specifically configured to determine the strength of the acoustic propagation signal source according to the obtained amplitude of the acoustic propagation signal and a preset correspondence between the amplitude and the strength of the acoustic propagation signal source.
In a feasible implementation manner of the embodiment of the present application, the processing module 102 is specifically configured to determine a damage type of the optical device to be measured based on the type of the acoustic propagation signal source and a preset correspondence between the type of the acoustic propagation signal source and the damage type; and determining the damage degree of the optical device to be detected based on the strength and the activity of the acoustic propagation signal source and the corresponding relation of the preset strength, activity and damage degree.
In a possible implementation manner of the embodiment of the present application, the obtaining module 101 is specifically configured to obtain, through at least four sensors preset on a device to be measured, an acoustic propagation signal generated when the device to be measured operates; the processing module 102 is further configured to determine, after acquiring, by at least four sensors preset on the to-be-measured optical device, an acoustic propagation signal generated when the to-be-measured optical device operates, a coordinate position of an acoustic propagation signal source in the to-be-measured optical device based on a coordinate position of each sensor and a time difference between the sensors receiving the acoustic propagation signal.
It should be understood that the content of the method steps in fig. 1 described in the first embodiment can be implemented by the apparatus 100 of the present embodiment, and for the sake of brevity, the content described in some of the first embodiment is not repeated in this embodiment.
Example four:
the present embodiment provides an electronic device, which is shown in fig. 4 and includes a processor 401, a memory 402, a communication bus 403, and a sensor 404. Wherein:
the communication bus 403 is used to enable connection communication between the processor 401, the memory 402, and the sensor 404.
The sensor 404 is disposed on the device to be measured to obtain an acoustic propagation signal generated by the device to be measured during operation, and transmit the acoustic propagation signal to the processor 401 through the communication bus 403.
The processor 401 is configured to execute one or more programs stored in the memory 402 to implement the steps of the optical device damage detection method described in the first embodiment and/or the second embodiment.
It will be appreciated that the processor 401 may be an integrated circuit chip having signal processing capabilities. The Memory 402 may include, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Read-Only Memory (EPROM), electrically Erasable Read-Only Memory (EEPROM), and the like.
It will be appreciated that the configuration shown in fig. 4 is merely illustrative and that the electronic device may include more or fewer components than shown in fig. 4 or may have a different configuration than shown in fig. 4. For example, the electronic device may further include a display unit (e.g., a display), and the display unit may provide a display interface between the electronic device and a user, so as to display the obtained data of the characteristic parameter of the acoustic propagation signal, the determined damage type and damage degree of the optical device to be measured, and the like, to the user for reference. In this embodiment, the display unit may be a liquid crystal display or a touch display. In the case of a touch display, the display can be a capacitive touch screen or a resistive touch screen, which supports single-point and multi-point touch operations. The support of single-point and multi-point touch operations means that the touch display can sense touch operations simultaneously generated from one or more positions on the touch display, and the sensed touch operations are sent to the processor for calculation and processing. In addition, the electronic device may further include an input-output unit, so as to provide a user with input data to realize the interaction of the user with the electronic device, thereby enabling the user to operate on the displayed data. Illustratively, the input/output unit may include, but is not limited to, a mouse, a keyboard, and the like.
It should be noted that the processor 401 may be a general-purpose processor, including a Central Processing Unit (CPU), etc.; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, etc.
The present embodiment further provides a readable storage medium, such as a floppy disk, an optical disk, a hard disk, a flash Memory, a usb (Secure Digital Memory Card), an MMC (Multimedia Card), etc., in which one or more programs for implementing the above steps are stored, and the one or more programs can be executed by one or more processors to implement the steps of the method for detecting damage to an optical device according to the first embodiment and/or the second embodiment. And will not be described in detail herein.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
In this context, a plurality means two or more.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (11)
1. A method for detecting damage to an optical device, comprising:
acquiring an acoustic propagation signal generated when a device to be measured operates;
processing the acoustic propagation signal to obtain characteristic parameters of the acoustic propagation signal;
determining the type, the strength and the activity of an acoustic propagation signal source in the optical device to be tested based on the characteristic parameters;
and determining the damage type and the damage degree of the optical device to be detected based on the type, the strength and the activity of the acoustic propagation signal source.
2. The method for detecting damage to an optical device according to claim 1, wherein the processing the acoustic propagation signal to obtain the characteristic parameter of the acoustic propagation signal comprises:
processing the acoustic propagation signal to obtain a time domain waveform and a frequency spectrum of the acoustic propagation signal;
and determining the characteristic parameters of the acoustic propagation signals based on the time domain waveform and the frequency spectrum of the acoustic propagation signals.
3. The optical device damage detection method according to claim 1, wherein the characteristic parameter includes a time-domain waveform of the acoustic propagation signal;
determining the type of the acoustic propagation signal source in the optical device to be tested based on the characteristic parameters comprises:
when the time domain waveform is continuous, determining the type of the sound propagation signal source to be a continuous sound propagation signal source;
and when the time domain waveform is discontinuous, determining the type of the sound propagation signal source as a burst type sound propagation signal source.
4. The optical device damage detection method according to claim 1, wherein the characteristic parameter includes an event number of the acoustic propagation signal;
determining the activity of the acoustic propagation signal source in the optical device to be tested based on the characteristic parameters comprises:
and determining the activity of the sound propagation signal source according to the corresponding relation between the preset change condition of the number of the events and the activity of the sound propagation signal source and the obtained number of the events of the sound propagation signal.
5. The optical device damage detection method according to claim 1, wherein the characteristic parameter includes an energy of the acoustic propagation signal;
determining the intensity of the acoustic propagation signal source in the optical device to be tested based on the characteristic parameters comprises:
and determining the strength of the acoustic propagation signal source according to the obtained energy of the acoustic propagation signal and the corresponding relation between the preset energy and the strength of the acoustic propagation signal source.
6. The optical device damage detection method according to claim 1, wherein the characteristic parameter includes an amplitude of the acoustic propagation signal;
determining the intensity of the acoustic propagation signal source in the optical device to be tested based on the characteristic parameters comprises:
and determining the strength of the acoustic propagation signal source according to the obtained amplitude of the acoustic propagation signal and the corresponding relation between the preset amplitude and the strength of the acoustic propagation signal source.
7. The method of claim 1, wherein the determining the damage type and the damage degree of the optical device under test based on the type, the intensity, and the activity of the acoustic propagation signal source comprises:
determining the damage type of the optical device to be tested based on the type of the acoustic propagation signal source and the preset corresponding relation between the type of the acoustic propagation signal source and the damage type;
and determining the damage degree of the optical device to be tested based on the strength and the activity of the acoustic propagation signal source and the corresponding relation of the preset strength, activity and damage degree.
8. The method of any of claims 1-7, wherein the obtaining the acoustic propagation signal generated during operation of the optical device under test comprises:
acquiring acoustic propagation signals generated when the optical device to be detected runs through at least four sensors preset on the optical device to be detected;
the optical device damage detection method further comprises:
after acoustic propagation signals generated when the optical device to be measured runs are acquired through at least four sensors preset on the optical device to be measured, the coordinate position of an acoustic propagation signal source in the optical device to be measured is determined based on the coordinate position of each sensor and the time difference of each sensor receiving the acoustic propagation signals.
9. An optical device damage detection apparatus, comprising: the device comprises an acquisition module and a processing module;
the acquisition module is used for acquiring an acoustic propagation signal generated when the optical device to be detected operates;
the processing module is used for processing the acoustic propagation signal to obtain a characteristic parameter of the acoustic propagation signal, determining the type, the strength and the activity of an acoustic propagation signal source in the optical device to be tested based on the characteristic parameter, and determining the damage type and the damage degree of the optical device to be tested based on the type, the strength and the activity of the acoustic propagation signal source.
10. An electronic device comprising a processor, a memory, a communication bus, and a sensor;
the communication bus is used for realizing connection communication among the processor, the memory and the sensor;
the sensor is used for being arranged on the device to be measured so as to obtain an acoustic propagation signal generated by the device to be measured during operation and transmit the acoustic propagation signal to the processor through the communication bus;
the processor is configured to execute one or more programs stored in the memory to implement the optical device damage detection method according to any one of claims 1 to 8.
11. A readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the optical device damage detection method according to any one of claims 1 to 8.
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