Acoustic equipment system clock and physical quantity calibration method, device and equipment depending on acoustic equipment system clock
By calibrating the system clock of the ultrasonic detection device using GPS time reference signals, the problem of difficulty in realizing the calibration of wireless ultrasonic detection device in the Internet of Things environment is solved, and wireless calibration of the acoustic device system clock and physical quantity measurements relying on the system clock is realized, improving the accuracy and reliability of measurement.
Patent Information
- Application Number
- CN202510144425.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2025-05-30
AI Technical Summary
In industry, ultrasonic detection equipment needs to be calibrated regularly using test blocks, making it difficult to achieve wireless measurement and calibration in an Internet of Things environment.
By obtaining the time reference signal output by GPS, the correction coefficient and uncertainty of the acoustic device system clock are determined, and the physical quantity measurement results dependent on the acoustic device system clock are corrected according to these parameters to achieve wireless calibration.
Wireless calibration of the system clock of the acoustic equipment and the physical quantity measurements that rely on the system clock are realized, improving the accuracy and reliability of the measurement.
Smart Images
Figure CN120063357A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of calibration of acoustic device systems, and particularly to a calibration method, device, and equipment for the system clock of an acoustic device system and physical quantities dependent on the system clock of the acoustic device system. Background Art
[0002] In industry, ultrasonic detection and monitoring is a very important method. For example, pulse ultrasonic signals are used for time-of-flight measurement to calculate the thickness of the object under test; the measurement of the longitudinal wave and (or) transverse wave and surface wave sound velocities of ultrasonic waves is used to judge the internal stress state; pulse ultrasonic signals and reflections are used for internal damage detection, including detection methods such as TOFD (Time Of Flight Diffraction) and phased array ultrasonic. Among them, time-related measurement is the basis of these detections, and its accuracy is very important.
[0003] Industrial ultrasonic detection equipment needs to be calibrated regularly to ensure the accuracy of measurement. Currently, ultrasonic detection equipment is usually calibrated and traced using test blocks with known thickness and damage. However, with the rapid development of the industrial Internet of Things, the above ultrasonic detection equipment has been gradually improved into a monitoring sensor and installed on the object under test for a long time. This makes it difficult to calibrate, verify, and trace the ultrasonic detection equipment using test blocks. Therefore, there is an urgent need for a wireless measurement and calibration method for ultrasonic detection equipment. Summary of the Invention
[0004] The purpose of this application is to provide a calibration method, device, and equipment for the system clock of an acoustic device system and physical quantities dependent on the system clock of the acoustic device system, which can realize wireless calibration of the system clock of the acoustic device and the physical quantity measurement dependent on the system clock.
[0005] To achieve the above purpose, this application provides the following solutions:
[0006] In the first aspect, this application provides a calibration method for the system clock of an acoustic device system and physical quantities dependent on the system clock of the acoustic device system, including: obtaining a time reference signal output by GPS; determining a correction coefficient of the system clock of the acoustic device according to the system clock of the acoustic device and the time reference signal; determining the uncertainty of the system clock of the acoustic device according to the correction coefficient; determining the uncertainty of the physical quantity measurement dependent on the system clock of the acoustic device according to the uncertainty of the system clock of the acoustic device; and respectively correcting the system clock of the acoustic device and the physical quantity measurement result dependent on the system clock of the acoustic device according to the correction coefficient of the system clock of the acoustic device to obtain a calibrated system clock of the acoustic device and a calibrated physical quantity measurement result.
[0007] In a second aspect, the present application provides an acoustic device system clock and a calibration device for physical quantities dependent on the acoustic device system clock, including: a reference signal acquisition module, a correction coefficient determination module, a system clock uncertainty acquisition module, a physical quantity uncertainty acquisition module, and a correction module.
[0008] The reference signal acquisition module is configured to acquire a time reference signal output by a GPS; the correction coefficient determination module is configured to determine a correction coefficient of the acoustic device system clock according to the acoustic device system clock and the time reference signal; the system clock uncertainty acquisition module is configured to determine the uncertainty of the acoustic device system clock according to the correction coefficient; the physical quantity uncertainty acquisition module is configured to determine the uncertainty of the measurement of the physical quantity dependent on the acoustic device system clock according to the uncertainty of the acoustic device system clock; the correction module is configured to respectively correct the acoustic device system clock and the measurement result of the physical quantity dependent on the acoustic device system clock according to the correction coefficient of the acoustic device system clock to obtain a calibrated acoustic device system clock and a calibrated physical quantity measurement result.
[0009] In a third aspect, the present application provides a computer device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the method for calibrating the acoustic device system clock and the physical quantities dependent on the acoustic device system clock according to any one of the above.
[0010] According to the specific embodiments provided by the present application, the present application has the following technical effects:
[0011] The present application provides a method, device, and equipment for calibrating an acoustic device system clock and physical quantities dependent on the acoustic device system clock. By receiving an accurate time reference signal output by a GPS, comparing the acoustic device system clock with the time reference signal, the accuracy of the system clock can be determined, and according to the accuracy of the system clock, the accuracy of the measurement of the physical quantity dependent on the acoustic device system clock can be judged. Further, according to the measured error of the acoustic device system clock, the measurement result of the physical quantity dependent on the acoustic device system clock is corrected to achieve wireless calibration of the system clock of the acoustic device and the measurement of the physical quantity dependent on the system clock. Description of the Drawings
[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0013] Figure 1Schematic flowchart of a method for calibrating the system clock of an acoustic device and physical quantities dependent on the system clock of the acoustic device in an embodiment of the present application;
[0014] Figure 2 Schematic diagram of GPS time synchronization output provided in an embodiment of the present application;
[0015] Figure 3 Schematic structural diagram of a computer device provided in an embodiment of the present application. Detailed implementation manners
[0016] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0017] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.
[0018] Different from using standard test blocks for traceability calibration of measured geometric quantities; considering that the acoustic measurement (monitoring) system before leaving the factory or before use has been calibrated with test blocks. During its long-term use, its measurement uncertainty mainly comes from time measurement errors; its main source is whether the system clock is accurate.
[0019] The present application measures and calibrates the standard clock of the acoustic measurement system based on the GPS standard clock signal, and further can calibrate other measurement results dependent on the system clock.
[0020] In an exemplary embodiment, as Figure 1 shown, a method for calibrating the system clock of an acoustic device and physical quantities dependent on the system clock of the acoustic device is provided, including the following steps 101 to 105. Wherein:
[0021] Step 101: Obtain the time reference signal output by GPS.
[0022] Step 102: Determine the correction coefficient of the system clock of the acoustic device according to the system clock of the acoustic device and the time reference signal.
[0023] Step 103: Determine the uncertainty of the system clock of the acoustic device according to the correction coefficient.
[0024] Step 104: Determine the uncertainty of the measurement of the physical quantity dependent on the system clock of the acoustic device according to the uncertainty of the system clock of the acoustic device.
[0025] Step 105: According to the correction coefficient of the acoustic device system clock, correct the acoustic device system clock and the physical quantity measurement results that depend on the acoustic device system clock respectively, to obtain a calibrated acoustic device system clock and calibrated physical quantity measurement results.
[0026] Implementing the above Step 101 to Step 105 can achieve wireless measurement and calibration of the system clock of the acoustic device, the flight time of the sound signal, and the measurement accuracy of other physical quantities related to the system clock.
[0027] Exemplarily, the physical quantities that depend on the acoustic device system clock are the flight time of the sound signal, the spectrum contained in the ultrasonic wave, and other physical quantities related to the system clock.
[0028] In another exemplary embodiment of the present application, Step 101 may specifically use a GPS receiver to obtain an accurate time reference signal output by the GPS.
[0029] In another exemplary embodiment of the present application, generally, the PPS signal output by the GPS is used as an accurate time reference signal to measure the clock error of the acoustic device system. There are various specific measurement methods. In this application, two measurement methods are taken as examples and combined with Figure 2 , taking the PPS signal output by the GPS as the time reference signal, a trigger signal can be obtained once per second, and Step 102 above will be elaborated in detail.
[0030] Method 1: Take the PPS signal output by the GPS as the time reference signal, and use the rising edge or falling edge of the PPS signal output by the GPS as the trigger signal; record the duration of the acoustic device system clock between two adjacent trigger signals; according to the recorded duration of the acoustic device system clock, use the formula to calculate the correction coefficient of the acoustic device system clock; in the formula, r 1 is the correction coefficient, and t 1 is the duration of the acoustic device system clock.
[0031] The interval between each trigger signal is 1 s.
[0032] Method 2: Take the PPS signal output by the GPS as the time reference signal, and use the rising edge or falling edge of the PPS signal output by the GPS as the trigger signal; record the number of pulses generated by the acoustic device system between two adjacent trigger signals; according to the recorded number of pulses generated by the acoustic device system, use the formula to calculate the correction coefficient of the acoustic device system clock; in the formula, r 1 is the correction coefficient, n 1 is the duration of the acoustic device system clock, and f 1 is the frequency of the pulses generated by the acoustic device system.
[0033] r 1 The closer it is to 1, the better the accuracy indicates.
[0034] In another exemplary embodiment of the present application, the calculation formula for the uncertainty of the system clock in the above step 103 is:
[0035]
[0036] In the formula, Δt 1 is the uncertainty of the system clock, and r 1 is the correction coefficient.
[0037] The smaller the uncertainty, the more accurate it indicates.
[0038] In another exemplary embodiment of the present application, for the measurement accuracy of the physical quantity dependent on the system clock of the acoustic device, the uncertainty of the system clock can be introduced according to the relationship between the measurement result and the system clock to calculate the measurement accuracy of the physical quantity dependent on the system clock of the acoustic device. When the physical quantity dependent on the system clock of the acoustic device is thickness, the above step 104 may specifically include: multiplying the uncertainty of the system clock of the acoustic device by v / 2, and determining the obtained result as the uncertainty of the measurement of the physical quantity dependent on the system clock of the acoustic device; where v is the sound velocity of the material to be measured.
[0039] In another exemplary embodiment of the present application, the system clock error of the acoustic device measured is corrected, and the measurement results of the flight time and other physical quantities dependent on the system clock are further corrected. The time quantity measured by the subsequent system can be calibrated by multiplying by r 1 and the frequency quantity measured can be calibrated by dividing by r 1 for calibration.
[0040] In one example, when the physical quantity dependent on the system clock of the acoustic device is a time quantity, the above step 105 may specifically include: multiplying the measurement result of the physical quantity dependent on the system clock of the acoustic device by the correction coefficient of the system clock of the acoustic device to obtain the calibrated measurement result of the physical quantity.
[0041] If the time quantity is thickness, when measuring the thickness and performing non-destructive testing by acoustic pulses, the calculation of the flight time needs to multiply by r 1 on the basis of the system measurement result to reflect the true thickness, defect position and defect size. Then the formula for correcting the measurement result of the physical quantity dependent on the system clock of the acoustic device is:
[0042] d2 = d × r 1 ;
[0043]
[0044] Wherein, d2 is the calibrated thickness measurement result, d is the thickness measurement result, r 1 is the correction coefficient, v is the sound velocity of the material to be measured, t is the measurement time, and n is the number of ultrasonic penetrations.
[0045] In another example, when the physical quantity dependent on the acoustic device system clock is a frequency quantity, step 105 above may specifically include: dividing the measurement result of the physical quantity dependent on the acoustic device system clock by the correction coefficient of the acoustic device system clock to obtain the calibrated physical quantity measurement result.
[0046] In another exemplary embodiment of the present application, to output the 1s time of the system clock, the system output duration can be set to r 1 . This method can be applied to Method 1.
[0047] In another exemplary embodiment of the present application, after step 105 above, the method may further include: the correction coefficient after each calibration is the correction coefficient obtained from this measurement multiplied by the correction coefficient before calibration.
[0048] In the present application, the accuracy of the system clock, flight time, and other system clock-dependent related physical quantities can be traced back to the GPS system.
[0049] By receiving the accurate time reference signal output by the GPS, comparing the acoustic device system clock with this time signal, the accuracy of the system clock can be determined. Further, based on the accuracy of the system clock, the accuracy of the sound signal flight time and other system clock-dependent related physical quantity measurements can be judged.
[0050] On this basis, the acoustic device system clock can be corrected according to the measured acoustic device system clock error, and further the measurement results of the flight time and other system clock-dependent related physical quantities can be corrected. Or, without correcting the acoustic device system clock, directly correct the flight time and other system clock-dependent related physical quantities.
[0051] Specifically, generally, the PPS signal output by the GPS system is used as the accurate time reference signal to measure the acoustic device system clock error.
[0052] There are various specific measurement methods. Method 1: Within the standard clock period of the received GPS signal (such as 1PPS), record the duration of the measured acoustic device system, the difference between the acoustic device system duration and the GPS signal standard clock period; judge the accuracy of the system clock according to the difference.
[0053] Method 2: The measured acoustic device system generates high-frequency pulse signals (such as 100 MHz). During the standard clock cycle (such as 1PPS) of the received GPS signal, record the number of pulses generated by the measured acoustic device system, and judge the accuracy of the system clock according to the number of pulses within the standard clock cycle.
[0054] Since the measurement of the flight time of the acoustic signal and other physical quantities related to the system clock depends on the accuracy of the system clock, the measurement accuracy of the flight time of the acoustic signal and other physical quantities related to the system clock can be calculated according to the hardware and software implementation processes of the measured system.
[0055] Furthermore, the error correction shown above is a linear method. The drift ratio of the system clock frequency can be calculated and multiplied by this drift ratio in the subsequent measurement results for correction.
[0056] During the measurement process, there is also a certain random error in the standard clock of the GPS. Therefore, when measuring the clock error of the measured acoustic system, multiple measurements can be used to eliminate the influence of the random error in the GPS standard clock on the measurement results.
[0057] Based on the same inventive concept, the embodiment of the present application also provides an acoustic device system clock and physical quantity calibration device for the physical quantity calibration method of the acoustic device system clock and the physical quantity dependent on the acoustic device system clock involved above. The implementation solution provided by this device to solve the problem is similar to the implementation solution recorded in the above method. Therefore, the specific limitations in one or more embodiments of the acoustic device system clock and physical quantity calibration device provided below can refer to the limitations on the physical quantity calibration method of the acoustic device system clock and the physical quantity dependent on the acoustic device system clock in the above text, and will not be repeated here.
[0058] In an exemplary embodiment, an acoustic device system clock and physical quantity calibration device for the physical quantity dependent on the acoustic device system clock is provided, including: a reference signal acquisition module, a correction coefficient determination module, a system clock uncertainty acquisition module, a physical quantity uncertainty acquisition module, and a correction module.
[0059] A reference signal acquisition module for acquiring a time reference signal output by GPS; a correction coefficient determination module for determining a correction coefficient of the acoustic device system clock according to the acoustic device system clock and the time reference signal; a system clock uncertainty acquisition module for determining the uncertainty of the acoustic device system clock according to the correction coefficient; a physical quantity uncertainty acquisition module for determining the uncertainty of the physical quantity measurement dependent on the acoustic device system clock according to the uncertainty of the acoustic device system clock; a correction module for respectively correcting the acoustic device system clock and the physical quantity measurement result dependent on the acoustic device system clock according to the correction coefficient of the acoustic device system clock to obtain a calibrated acoustic device system clock and a calibrated physical quantity measurement result.
[0060] In an exemplary embodiment, a computer device is provided. The computer device can be a server or a terminal, and its internal structure diagram can be as Figure 3 shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store the calibrated physical quantity measurement results. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements a calibration method for an acoustic device system clock and a physical quantity dependent on the acoustic device system clock.
[0061] Those skilled in the art can understand that Figure 3 the structure shown in
[0062] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0063] Specific examples are used in this article to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.
Claims
1. A method for calibrating a system clock of an acoustic device and a physical quantity dependent on the system clock of an acoustic device, characterized in that: include: Get the time reference signal output by GPS; Determining a correction coefficient of the acoustic device system clock according to the acoustic device system clock and the time reference signal; determining the uncertainty of a system clock of the acoustic device according to the correction coefficient; Determine the uncertainty of the measurement of physical quantities that rely on the acoustic device system clock based on the uncertainty of the acoustic device system clock; According to the correction coefficient of the acoustic device system clock, the acoustic device system clock and the physical quantity measurement result dependent on the acoustic device system clock are corrected respectively to obtain a calibrated acoustic device system clock and a calibrated physical quantity measurement result.
2. The method for calibrating a physical quantity of an acoustic device system clock and a physical quantity dependent on the acoustic device system clock according to claim 1, characterized in that: Determining a correction coefficient of the acoustic device system clock according to the acoustic device system clock and the time reference signal, specifically comprising: The PPS signal output by GPS is used as the time reference signal, and the rising edge or falling edge of the PPS signal output by GPS is used as the trigger signal; Record the duration of the acoustic device system clock between two adjacent trigger signals; According to the recorded duration of the acoustic device system clock, the formula Calculate the correction coefficient of the acoustic device system clock; where r1 is the correction coefficient and t1 is the duration of the acoustic device system clock.
3. The method for calibrating a system clock of an acoustic device and a physical quantity dependent on the system clock of an acoustic device according to claim 1, characterized in that: Determining a correction coefficient of the acoustic device system clock according to the acoustic device system clock and the time reference signal, specifically comprising: The PPS signal output by GPS is used as the time reference signal, and the rising edge or falling edge of the PPS signal output by GPS is used as the trigger signal; Record the number of pulses generated by the acoustic device system between two adjacent trigger signals; Based on the number of pulses generated by the recorded acoustic device system, the formula Calculate the correction factor of the acoustic device system clock; where r1 is the correction factor, n1 is the duration of the acoustic device system clock, and f1 is the frequency of the pulses generated by the acoustic device system.
4. The method for calibrating a system clock of an acoustic device and a physical quantity dependent on the system clock of an acoustic device according to claim 1, characterized in that: The calculation formula for the uncertainty of the system clock is: Where Δt1 is the uncertainty of the system clock and r1 is the correction coefficient.
5. The method for calibrating a system clock of an acoustic device and a physical quantity dependent on the system clock of an acoustic device according to claim 1, characterized in that: When the physical quantity that depends on the acoustic device system clock is thickness, the uncertainty of the measurement of the physical quantity that depends on the acoustic device system clock is determined according to the uncertainty of the acoustic device system clock, specifically including: The uncertainty of the acoustic device system clock is multiplied by v / 2, and the result is determined as the uncertainty of the measurement of the physical quantity that depends on the acoustic device system clock; where v is the sound velocity of the material being measured.
6. The method for calibrating a system clock of an acoustic device and a physical quantity dependent on the system clock of an acoustic device according to claim 1, characterized in that: When the physical quantity dependent on the acoustic device system clock is a time quantity, the physical quantity measurement result dependent on the acoustic device system clock is corrected according to the correction coefficient of the acoustic device system clock to obtain a calibrated physical quantity measurement result, specifically including: The physical quantity measurement result that depends on the acoustic device system clock is multiplied by the correction coefficient of the acoustic device system clock to obtain a calibrated physical quantity measurement result.
7. The method for calibrating a physical quantity of an acoustic device system clock and a physical quantity dependent on the acoustic device system clock according to claim 6, characterized in that: If the time quantity is thickness, the formula for correcting the measurement result of the physical quantity that depends on the system clock of the acoustic device is: d2=d×r1; Where d2 is the calibrated thickness measurement result, d is the thickness measurement result, r1 is the correction coefficient, v is the sound velocity of the material being measured, t is the measurement time, and n is the number of ultrasonic penetrations.
8. The method for calibrating a system clock of an acoustic device and a physical quantity dependent on the system clock of an acoustic device according to claim 1, characterized in that: When the physical quantity dependent on the acoustic device system clock is a frequency quantity, the physical quantity measurement result dependent on the acoustic device system clock is corrected according to the correction coefficient of the acoustic device system clock to obtain a calibrated physical quantity measurement result, specifically including: The physical quantity measurement result that depends on the acoustic device system clock is divided by the correction coefficient of the acoustic device system clock to obtain a calibrated physical quantity measurement result.
9. An acoustic device system clock and a physical quantity calibration device dependent on the acoustic device system clock, characterized in that: The acoustic device system clock and the physical quantity calibration device dependent on the acoustic device system clock include: A reference signal acquisition module is used to obtain a time reference signal output by GPS; A correction coefficient determination module, used to determine the correction coefficient of the acoustic device system clock according to the acoustic device system clock and the time reference signal; A system clock uncertainty obtaining module, used to determine the uncertainty of the acoustic device system clock according to the correction coefficient; A physical quantity uncertainty obtaining module, used for determining the uncertainty of the physical quantity measurement dependent on the acoustic device system clock according to the uncertainty of the acoustic device system clock; The correction module is used to correct the acoustic device system clock and the physical quantity measurement results dependent on the acoustic device system clock according to the correction coefficient of the acoustic device system clock, so as to obtain a calibrated acoustic device system clock and a calibrated physical quantity measurement result.
10. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the acoustic device system clock and the physical quantity calibration method dependent on the acoustic device system clock as described in any one of claims 1 to 8.