Ultrasonic transducer characteristic parameter labeling system and labeling method

Abstract

The invention discloses a labeling system and a labeling method for characteristic parameters of an ultrasonic transducer, and relates to the field of medical ultrasonic calibration labeling. The method comprises the following steps: acquiring an optimal frequency of a to-be-ultrasonic transducer based on an ultrasonic transducer parameter; under the optimal frequency, the driving voltage is adjusted, the power at the sound intensity calibration points of the ultrasonic transducer reaches the standard power value, the corresponding power values of the sound intensity calibration points under different voltage values are obtained, and then the linear relation between the ultrasonic sound intensity power values of all the sound intensity points on the ultrasonic transducer and the voltage is obtained. According to the invention, the problem of difference between different ultrasonic transducers is solved.

Description

Technical Field

[0001] The present invention relates to the field of medical ultrasound calibration and labeling, and in particular to a labeling system and a labeling method for characteristic parameters of an ultrasound transducer. Background Art

[0002] Medical ultrasound is mainly achieved by ultrasonic transducers, which can convert high-frequency electrical energy into mechanical energy and convert electrical signals into mechanical vibrations by the piezoelectric effect. Piezoelectric ceramics are a type of functional ceramics. When an electric field is applied to a piezoelectric ceramic, the piezoelectric ceramic will undergo a slight deformation, which is the inverse piezoelectric effect of the piezoelectric ceramic. Ultrasound is generated by the inverse piezoelectric effect.

[0003] Ultrasonic transducers have individual differences due to various factors in their manufacturing process, including material inhomogeneity, slight changes in process parameters, and accidental factors in the production process. The characteristics of ultrasonic transducers depend on the material selection and manufacturing process, and the performance of transducers of the same size and shape varies greatly. Individual differences may cause fluctuations in the performance parameters of piezoelectric ceramics, thereby affecting their performance in characteristic applications. At the same time, the operation of piezoelectric ceramics themselves will be affected by temperature, resulting in a significant impact on important parameters during use.

[0004] At present, in order to solve the problem of individual differences in ultrasonic transducers, most people prefer to optimize the design and manufacture of ultrasonic transducers to solve it, by improving the preparation process, strengthening the quality control of piezoelectric ceramic sheets, or customizing the design according to the needs of different fields. Or choose to pass strict performance testing or consistency inspection. There are two main inspection methods, one is the self-easy calibration method, and the other is the adjustment matching element method; the self-easy calibration method is a calibration method based on the characteristics of the transducer itself, but the accuracy of the result is affected by temperature fluctuations, and temperature is one of the important factors in the operation of the transducer. When the parameters are adjusted and compared manually each time, the time, temperature, and other factors will affect the accuracy of the result; adjusting the matching element requires the detection of the state of the matching element, and the matching circuit is stable according to the temperature of the transducer and other factors, so as to ensure the output of the specified voltage, but this calibration method designs multiple technical links and is technically difficult, and frequent replacement of matching elements will also increase costs. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the present invention solves the problem of differences between different ultrasonic transducers, automatically regulates the voltage of the ultrasonic transmitting module without the need to use complex multi-link technology, and ensures that the output power of the ultrasonic transducer reaches a unified standard value without being affected by its own temperature and individual differences, thereby avoiding errors caused by temperature and human factors.

[0006] A first aspect of the present invention provides a system for labeling characteristic parameters of an ultrasonic transducer, comprising:

[0007] a parameter receiving unit, for receiving setting parameters, wherein the setting parameters include the effective area of ​​the ultrasonic transducer probe, the duty cycle, the number of sound intensity calibration points and the sound intensity value of each sound intensity calibration point, wherein the sound intensity values ​​of the sound intensity calibration points are arranged in order from small to large, and are respectively I 1 ,I 2 ,I 3 ,…,I n ;

[0008] A frequency calibration unit, used to obtain an optimal frequency of the ultrasonic transducer based on the ultrasonic transducer parameters;

[0009] The power calibration unit adjusts the driving voltage at the optimal frequency so that the power at the sound intensity calibration point of the ultrasonic transducer reaches the standard power value, and records the driving voltage at this time as V 1 、V 2 、V 3 ,…,V n , and then the linear relationship between the standard power value and voltage of all sound intensity points on the ultrasonic transducer is obtained.

[0010] Furthermore, the operating temperature includes a maximum temperature, a minimum temperature and a mean temperature.

[0011] Furthermore, the ultrasonic transducer adopts a periodic working mode, and the duty cycle is the ratio of the working time of the ultrasonic transducer to the cycle time.

[0012] Furthermore, the ultrasonic transducer characteristic parameter annotation system writing unit is used to write the power and voltage values ​​corresponding to the optimal frequency and sound intensity calibration point into the ultrasonic transmitting module.

[0013] A second aspect of the present invention provides a method for labeling characteristic parameters of an ultrasonic transducer, which is implemented based on the labeling system for characteristic parameters of an ultrasonic transducer and includes the following steps:

[0014] The parameter receiving step receives setting parameters, wherein the setting parameters include the effective area of ​​the ultrasonic transducer probe, the duty cycle, the number of sound intensity calibration points, and each sound intensity calibration point, wherein the sound intensity calibration points are arranged in order from small to large, and are respectively I 1 ,I 2 ,I 3 ,…,I n ;

[0015] A frequency calibration step, based on the ultrasonic transducer parameters, obtaining the optimal frequency of the ultrasonic transducer;

[0016] The power calibration step is to adjust the driving voltage at the optimal frequency so that the power at the sound intensity calibration point of the ultrasonic transducer reaches the standard power value, and record the driving voltage at this time as V 1 、V 2 、V 3 ,…,V n , and then the linear relationship between the standard power value and voltage of all sound intensity points on the ultrasonic transducer is obtained.

[0017] Furthermore, the method for constructing the linear relationship between the standard power value and the voltage includes:

[0018] Calculate the standard power value corresponding to each sound intensity calibration point, which is P 1 , P 2 , P 3 ,…,P n ;

[0019] Taking the power points corresponding to each sound intensity point as nodes, several power intervals are obtained, which are [P 1 , P 2 ),[P 2 , P 3 ),…[P n-1 , P n ], any target power P in the i-th power interval in The current relationship between and the corresponding voltage value V is:

[0020]

[0021] Furthermore, the frequency calibration step includes: adjusting the operating frequency while keeping the set parameters unchanged, and taking the operating frequency when the output power is maximum as the optimal frequency.

[0022] Furthermore, the sound intensity calibration points include a minimum ultrasonic sound intensity point and a maximum ultrasonic sound intensity point.

[0023] Compared with the prior art, the present invention has the following technical effects:

[0024] 1. The present invention is based on the difference problem between different piezoelectric ultrasonic transducers. After adjusting the working frequency value of the ultrasonic transmitting module to obtain the corresponding optimal working frequency value, several points within the ultrasonic sound intensity range are selected for output power detection, the voltage value corresponding to the required accuracy of the ultrasonic sound intensity is calculated, and the data set of the relationship between the voltage and the output power after detection is stored, which solves the nonlinear problem between the sound power output and the voltage control. During the calibration, multiple groups of piecewise linear relationships between power and voltage are established, and the relationship between different control voltages and the output power is given, avoiding data processing and analysis errors caused by environmental factors and human control factors. The linear relationship shortens the time for calibrating the power, avoids the heating of the transducer due to long-term operation, and affects the output power. At the same time, automatic calibration avoids errors caused by human factors.

[0025] 2. The present invention adjusts specific parameters (frequency, voltage, etc.) and matches the hardware circuit to make the ultrasonic transducer work in the best state; the present invention can perform automatic calibration function, calibrate the working voltage of the ultrasonic transducer at different temperatures, and store it in the ultrasonic transducer for verification again. The present invention can be applied to the calibration field of medical ultrasonic transducers with higher requirements, and can also be applied to the calibration process of industrial transducers with the same principle.

[0026] 3. The present invention performs automatic transducer characteristic parameter detection after the equipment is debugged, and avoids the error caused by human factors through automatic functions. In the automatic detection process, the highest temperature and the lowest temperature required by the ultrasonic transducer are used to perform calibration functions at different temperatures to avoid the error caused by temperature affecting the operation of the ultrasonic transducer. During automatic detection, the temperature is coordinated according to the temperature range required for the calibration of the ultrasonic transducer, so that each ultrasonic transducer can be calibrated in different working states according to its own temperature range.

[0027] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the structure of a marking system for characteristic parameters of an ultrasonic transducer according to a specific embodiment of the present invention;

[0029] Figure 2 It is an overall flow chart of a method for marking characteristic parameters of an ultrasonic transducer according to a specific embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of a power calibration process according to a specific embodiment of the present invention;

[0031] Figure 4 It is a schematic diagram of a power calibration system interface according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0033] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic manner, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0034] While some exemplary embodiments of the present invention have been described for the purpose of illustration, it should be understood that the present invention may be implemented in other ways not specifically shown in the drawings.

[0035] like Figure 1 As shown, in a specific embodiment, a system for labeling characteristic parameters of an ultrasonic transducer is provided, including a parameter receiving unit, a frequency calibration unit, a power calibration unit, a writing unit and a verification unit.

[0036] The parameter receiving unit is used to receive setting parameters, and the setting parameters include the effective area of ​​the probe of the ultrasonic transducer, the duty cycle, the number of sound intensity calibration points, the sound intensity calibration points and the operating temperature.

[0037] The effective area refers to the effective radiation area, which is set based on the requirements of the national standard (GB 9706.205-2020) for the acoustic output of ultrasonic transducers. It is related to the structure and acoustic output characteristics of the transducer and can be obtained according to the corresponding measurement and calculation formulas given in the national standard.

[0038] The ultrasonic transducer in this embodiment is used in the medical field. The duty cycle is based on the requirements of medical treatment and adopts an intermittent (periodic) working mode. The duty cycle is the percentage of the working time in the entire cycle.

[0039] In this embodiment, the number of sound intensity calibration points may be determined based on the actual use of the ultrasonic transducer accuracy. If the required accuracy is extremely high, all sound intensity points within the range may be selected. If the required accuracy is normal, an average selection is made based on the sound intensity point range, and the specific number is set by the actual situation. For example, when the sound intensity point range of the calibrated ultrasonic transducer is 0.1-2W / cm^2, the compensation is made at intervals of 0.1, and the selected sound intensity calibration points are 0.1W / cm^2, 0.2W / cm^2, 0.3W / cm^2, 0.4W / cm^2, 0.5W / cm^2, ..., 1.8W / cm^2, 1.9W / cm^2, and 2.0W / cm^2, respectively. In actual application, the calibration accuracy can be adjusted as needed. After all calibration points are determined according to the calibration accuracy, when making a selection, except for the lowest sound intensity point and the highest sound intensity point, the remaining calibration detection points can be selected according to actual usage. If the required ultrasonic transducer working accuracy is extremely high, all sound intensity points can be selected for calibration. If the required ultrasonic transducer working accuracy is relatively stable, individual intermediate sound intensity calibration points can be selected on average for calibration.

[0040] In this embodiment, the sound intensity calibration points are selected based on the national standard (GB 9706.205-2020), and are selected on the basis of determining the number of calibration parameters. The ultrasonic sound intensity calibration points must include the minimum ultrasonic sound intensity point and the maximum ultrasonic sound intensity point. Other sound intensity points are selected within the range of the lowest sound intensity and the highest sound intensity. The remaining sound intensity calibration points can be randomly selected. In order to obtain more accurate labeling results, the remaining sound intensity calibration points are selected according to a certain rule so that the voltage values ​​corresponding to the remaining ultrasonic sound intensity points are calculated linearly. The remaining sound intensity points can also be averaged according to the sound intensity working range of the ultrasonic transducer to be calibrated.

[0041] Since the ultrasonic transducer is affected by temperature, the operating temperature is added to the parameters in this embodiment, so that the temperature of the piezoelectric transducer works within the temperature range adapted to the human body. For the specific use range of the ultrasonic transducer temperature, the operating temperature includes the highest temperature, the lowest temperature and the mean temperature. The mean temperature described in this embodiment is the middle temperature between the highest point temperature, the lowest point and the lowest point. By simultaneously performing three different temperature detection and marking, the problem of personalized differences caused by material problems or manufacturing processes is compensated. In this embodiment, the real-time temperature is obtained by the temperature sensor each time and the data is marked within a fixed temperature range to avoid damage caused by too low or too high temperature.

[0042] The maximum temperature and the minimum temperature in this embodiment are mainly input according to the actual operating temperature range of the calibration ultrasonic transducer to match the temperature when the calibrated ultrasonic transducer is used, so as to avoid inaccurate output power when the ultrasonic transducer is used within the temperature range.

[0043] The frequency calibration unit is used to obtain the optimal frequency of the ultrasonic transducer based on the ultrasonic transducer parameters, and the optimal frequency is the working frequency when the output power value is larger. After the frequency calibration is performed, the data involved in the subsequent power calibration and the operation of the computer hardware can all work according to the calibration frequency.

[0044] The power calibration unit is used to adjust the driving voltage at the optimal frequency so that when the ultrasonic transducer is at a specified sound intensity, the power at the sound intensity calibration point of the ultrasonic transducer reaches a standard power value, and the driving voltage at this time is recorded to obtain the linear relationship between the ultrasonic sound intensity and the voltage at all sound intensity points on the ultrasonic transducer.

[0045] In this embodiment, n sound intensity calibration points are selected within the sound intensity range, and the sound intensity values ​​of the sound intensity calibration points are arranged in order from small to large, respectively. 1 ,I 2 ,I 3 ,…,I n , the standard power values ​​corresponding to each sound intensity calibration point are P 1 , P 2 , P 3 ,…,Pn, where the standard power value of the i-th sound intensity calibration point is: P i =I i *A ER , A ER is the effective radiation area; the voltages when each sound intensity point reaches the standard power value are obtained through the power calibration unit and are V 1 、V 2 、V 3 ,…,V n .

[0046] Taking the power points corresponding to each sound intensity calibration point as nodes, several power intervals are obtained, which are [P 1 , P 2 ),[P 2 , P 3 ),…[P n-1 , P n ], any target power P in the i-th power interval in The current relationship between and the corresponding voltage value V is:

[0047]

[0048] Through the above current relationship, the voltage value required to achieve the target power at the required sound intensity point can be obtained.

[0049] For example, the ultrasonic sound intensity ranges from 0.1W / cm 2 -2W / cm 2, select sound intensity points of 0.1, 0.5, 1, 1.5, and 2 as calibration data. During calibration, the target power value corresponding to each sound intensity point will also record the corresponding voltage value. Through the power calibration unit, five sets of voltage and power data sets are obtained. By calculating the segmented linear relationship between multiple sets of voltage and power, the voltage value corresponding to the target power value of each sound intensity point within the sound intensity point of 0.1W / cm^2-2W / cm^2 can be obtained.

[0050] The writing unit is used to write the power and voltage values ​​corresponding to the sound intensity calibration point at the optimal frequency into the ultrasonic transmitting module. In this embodiment, after the detection and marking are completed, at the optimal frequency, based on the temperature range of the ultrasonic transducer, at the lowest temperature point, the voltage and power data set corresponding to the sound intensity calibration point, at the highest temperature point, the voltage and power data set corresponding to the sound intensity calibration point, at the intermediate temperature point, the voltage and power data set corresponding to the sound intensity calibration point. These three sets of data sets are written into the ultrasonic transducer, and an Excel table containing different temperature data sets of sound intensity, voltage, and power after detection and marking is automatically generated. Data processing and analysis errors caused by environmental factors and human control factors are avoided, personalized differences caused by material problems or manufacturing processes are compensated, and traceable data sets are formed for different ultrasonic transducers.

[0051] The verification unit is used to check again after calibrating the voltage and frequency whether the calibrated optimal working frequency value and the power and voltage values ​​corresponding to the required ultrasonic sound intensity point are written successfully. After writing the temperature data set into the ultrasonic transducer, any sound intensity point within the sound intensity range of the ultrasonic transducer can be selected to repeat the work to check whether the output power reaches the standard output power value when the written data is worked twice, thereby enhancing the rigor and standardization of the detection and labeling.

[0052] In the above embodiments, each of the above units can be implemented by hardware modules, software programs, or hardware combined with software. In this embodiment, the above units are loaded into the main control chip in the form of software programs to achieve the above effects, and the corresponding temperature data and power data are obtained by combining existing components such as existing temperature sensors and power meters. In this embodiment, after the digital ultrasonic power meter and the ultrasonic transmitting board start sending data, real-time data processing is immediately performed with very little delay; a data visual module can be used, and after the detection system communicates with the computer hardware, the contents of the sent and received data will be displayed in the interface window to achieve real-time data processing; the calibration process can be automated, and by processing data internally, the accuracy of the calibration power value is improved, the time for calibrating the piezoelectric transducer is shortened, and data precision is achieved.

[0053] The labeling system of this embodiment solves the problems of time-consuming, low precision and efficiency caused by manually adjusting the voltage values ​​in sequence to reach the target power. It can automatically adjust the voltage value in a short time, establish a more accurate relationship between voltage and power, and simplify user operation.

[0054] Based on the ultrasonic transducer characteristic parameter labeling system described in the above embodiment, a method for labeling ultrasonic transducer characteristic parameters is provided in a specific embodiment. Figure 2 As shown, the following steps are included:

[0055] S1, a parameter receiving step, receiving setting parameters, wherein the setting parameters include an effective area of ​​a probe of an ultrasonic transducer, a duty cycle, the number of sound intensity calibration points, and the sound intensities of the n sound intensity calibration points.

[0056] Mark the connection between the serial port of the system, the power meter and the ultrasonic transducer to avoid communication disconnection, then set the working parameters of the ultrasonic transmitting module, calculate the output power corresponding to each sound intensity calibration point of the ultrasonic transducer, the number of sound intensity calibration points and the operating temperature range of the ultrasonic transducer.

[0057] S2: a frequency calibration step, obtaining the optimal frequency of the ultrasonic transducer based on the ultrasonic transducer parameters.

[0058] The parameters of the pressure ultrasonic transducer (electric ceramic sheet) are discrete. For each different transducer, the impedance matching principle needs to be adopted to ensure the maximum efficiency of the sound power output. The system needs to control the inherent characteristics of each transducer, that is, select the inherent frequency to work. After the frequency calibration is completed, the frequency of all working points is ensured to be the optimal frequency during the subsequent power calibration, so that the working efficiency is the best.

[0059] In this embodiment, the frequency calibration step includes: setting the number of sound intensity points that need to be calibrated, setting the same duty cycle and operating voltage, keeping parameters other than the operating frequency unchanged, adjusting the operating frequency value, observing the parameters of the digital ultrasonic power meter, and finding the frequency that can maximize the output power within the adjustment range. This frequency is the optimal frequency.

[0060] S3, power calibration step, at the optimal frequency, adjust the driving voltage so that the power at the sound intensity calibration point of the ultrasonic transducer reaches the standard power value, and record the driving voltage at this time as V 1 、V 2 、V 3 ,…,V n, and then obtain the linear relationship between the standard power value and voltage of all sound intensity points on the ultrasonic transducer. The specific linear relationship is as described above and will not be repeated here. After calibrating the selected ultrasonic sound intensity point through power calibration and saving the voltage and power corresponding to the calibrated ultrasonic sound intensity point, the specific example is as follows Figure 3 As shown, it saves the time of detection and calibration, improves the accuracy of data processing, and avoids errors caused by environmental factors and human factors;

[0061] S4, writing step. In this embodiment, after the calibration is completed, the calibrated voltage, power and other data are manually written into the ultrasonic transducer as a data set, and the data set is saved to the local device to form an Excel table.

[0062] S5, verification step, through the verification unit and the data acquisition module from the lower computer to verify the automatic detection system, re-verify the written voltage and output power data set to achieve a repeated verification effect. The verification step includes calibration verification and treatment verification.

[0063] The calibration verification process includes:

[0064] 1). Read the best frequency point;

[0065] 2). Read the voltage value and output power value of the randomly selected sound intensity calibration point within the required ultrasonic sound intensity range to check whether the data written to the probe head is successfully written;

[0066] 3). Adjust different duty cycle data, obtain the working voltage value and target power value corresponding to each sound intensity point written into the ultrasonic transducer, control the ultrasonic on and off of the ultrasonic transducer, and compare the actual power meter reading (actual output power) with the target power when the ultrasound is turned on to further verify whether the calibration data is correct.

[0067] 4) During the verification process, you can arbitrarily select values ​​within the sound intensity point range of the ultrasonic transducer and perform random ultrasonic start verification to check whether there is data at the other sound intensity points and whether they can work normally. Observe whether the digital ultrasonic power meter is the same as the standard value.

[0068] The ultrasonic transducer in this embodiment is used in the field of medical ultrasonic treatment, so treatment verification is required. The specific target power data can be obtained by inputting the ultrasonic sound intensity data and the effective area of ​​the probe used. The software will send the target power value corresponding to the sound intensity to the transducer. The transducer automatically calculates the voltage value corresponding to the target power through the written data set during calibration. The ultrasonic transmission module will work according to the voltage value, duty cycle, and frequency. At this time, the ultrasound is turned on and the transducer starts working. This working method is consistent with the working steps of turning on ultrasound for treatment in the sonic dynamic intelligent diagnosis and treatment system for arterial plaques, and the re-verification of the calibrated probe can be completed in the annotation system of the ultrasonic transducer characteristic parameters.

[0069] The following embodiments are used to further illustrate the present invention. The system interface for marking the characteristic parameters of the ultrasonic transducer used in this embodiment is as follows: Figure 4 shown.

[0070] After the automatic detection system connects the power meter and the ultrasonic transmitter board, the serial communication part is performed first. By selecting the baud rate and serial port number corresponding to the connection between the ultrasonic transmitter board and the power meter, the communication connection is performed. When the business does not need communication, click the "Close Serial Port" button to disconnect from the computer hardware, and the current connection status is reflected in the interface.

[0071] Enter the effective area, duty cycle, and number of required calibration parameters to set the basic parameters of the ultrasonic transmitter module.

[0072] Click "Frequency Calibration" to calibrate the optimal working frequency value. After confirming the optimal working frequency value, click the "Save Frequency" button to store the optimal working frequency value in the piezoelectric transducer.

[0073] After selecting the individual ultrasonic sound intensity calibration point to be calibrated, click the "Power Calibration" button. The calibration automatically adjusts the voltage value so that the output power value of the working ultrasonic transmitting module reaches the standard output power value. Then, click the "Save" button to store the relationship between voltage and output power into the "Control Parameters Write to Front-end Control Chip" module.

[0074] Click the "Write" button in "Write control parameters to front-end control chip". The automatic detection system will write the calibrated power and corresponding driving voltage relationship data set into the ultrasonic transmitting module, and obtain the real-time working temperature of the temperature sensor. The ultrasonic transmitting module will mark the relationship data set within the fixed temperature range of the piezoelectric transducer.

[0075] Adjust the constant temperature box to the lowest point (highest point, middle point) of the ultrasonic transducer working range, obtain the data returned by the ultrasonic transducer temperature sensor, and after reaching the temperature point, ensure that other data except the voltage value remain unchanged. The detection and annotation system automatically adjusts the voltage value, and compares the output power value displayed by the digital ultrasonic power meter with the standard power value, and automatically adjusts it. After it is within the error range, it is automatically saved to the data set. At this point, the business of detecting and establishing the voltage and power relationship data set of the pressure ceramic ultrasonic transducer within a fixed temperature range is completed. The obtained input is shown in Table 1, where the calibration sound intensity working point is the working point selected during the calibration process, the voltage required for 100% duty cycle is the voltage value when the sound intensity point reaches the target power during calibration, the total power is the target power, and the temperature is the ultrasonic transducer temperature during calibration;

[0076] Table 1: Data table of each calibration sound intensity point

[0077]

[0078] According to the experiment, the present invention can be combined with the digital ultrasonic power meter and ultrasonic transmitting board in the prior art to solve the difference problem between various piezoelectric ultrasonic transducers. After adjusting the working frequency value of the ultrasonic transmitting module by computer software to obtain the corresponding optimal working frequency value, several points within the ultrasonic sound intensity range are selected for output power detection. The computer hardware automatically calculates the voltage value corresponding to the required accuracy of the ultrasonic sound intensity, and stores the data set of the relationship between the voltage and the output power after detection in the piezoelectric transducer to avoid data processing and analysis errors caused by environmental factors and human control factors. It realizes automated, simplified, efficient, high-precision and fast calibration operations, and has the advantages of accurate and real-time calibration data, real-time data processing, data visualization, high efficiency and small error, and reasonable working temperature of piezoelectric transducers.

[0079] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A labeling system for characteristic parameters of an ultrasonic transducer, characterized in that: include: The parameter receiving unit is used to receive the setting parameters, wherein the setting parameters include the effective area of ​​the ultrasonic transducer probe, the duty cycle, the number of sound intensity calibration points and the sound intensity value of each sound intensity calibration point, wherein the sound intensity values ​​of the sound intensity calibration points are arranged in order from small to large, namely, I1, I2, I3, ..., I n ; A frequency calibration unit, used to obtain an optimal frequency of the ultrasonic transducer based on the ultrasonic transducer parameters; The power calibration unit adjusts the driving voltage at the optimal frequency so that the power at the sound intensity calibration point of the ultrasonic transducer reaches the standard power value, and records the driving voltage at this time as V1, V2, V3, ..., V n , and then the linear relationship between the standard power value and voltage of all sound intensity points on the ultrasonic transducer is obtained.

2. The ultrasonic transducer characteristic parameter labeling system according to claim 1, characterized in that: The operating temperature includes a maximum temperature, a minimum temperature and a mean temperature.

3. The ultrasonic transducer characteristic parameter labeling system according to claim 1, characterized in that: The ultrasonic transducer adopts a periodic working mode, and the duty cycle is the ratio of the working time of the ultrasonic transducer to the cycle time.

4. The ultrasonic transducer characteristic parameter labeling system according to claim 1, characterized in that: The ultrasonic transducer characteristic parameter annotation system writing unit is used to write the power and voltage values ​​corresponding to the optimal frequency and sound intensity calibration point into the ultrasonic transmitting module.

5. A method for marking characteristic parameters of an ultrasonic transducer, characterized in that: The implementation of the labeling system of the characteristic parameters of the ultrasonic transducer according to any one of claims 1 to 4 comprises the following steps: The parameter receiving step receives setting parameters, wherein the setting parameters include the effective area of ​​the ultrasonic transducer probe, the duty cycle, the number of sound intensity calibration points, and the sound intensity value of each sound intensity calibration point, wherein the sound intensity values ​​of the sound intensity calibration points are arranged in order from small to large, and are respectively I1, I2, I3, ..., I n ; A frequency calibration step, based on the ultrasonic transducer parameters, obtaining the optimal frequency of the ultrasonic transducer; The power calibration step is to adjust the driving voltage at the optimal frequency so that the power at the sound intensity calibration point of the ultrasonic transducer reaches the standard power value, and record the driving voltage at this time as V1, V2, V3, ..., V n , and then the linear relationship between the standard power value and voltage of all sound intensity points on the ultrasonic transducer is obtained.

6. A method for marking characteristic parameters of an ultrasonic transducer according to claim 5, characterized in that: The method for constructing the linear relationship between the standard power value and the voltage includes: Calculate the standard power value corresponding to each sound intensity calibration point, which is P1, P2, P3, ..., P n ; Taking the power points corresponding to each sound intensity point as nodes, several power intervals are obtained, namely [P1, P2), [P2, P3), … [P n-1 , P n ], any target power P in the i-th power interval in The current relationship between and the corresponding voltage value V is:

7. The method for marking characteristic parameters of an ultrasonic transducer according to claim 5, characterized in that: The frequency calibration step includes: adjusting the operating frequency while keeping the set parameters unchanged, and taking the operating frequency when the output power is maximum as the optimal frequency.

8. The method for marking characteristic parameters of an ultrasonic transducer according to claim 5, characterized in that: The sound intensity calibration points include a minimum ultrasonic sound intensity point and a maximum ultrasonic sound intensity point.

Images