Multi-ultrasonic horn remote sharing type driving device and method

Abstract

The application discloses a kind of multi-ultrasonic vibration head remote sharing type driving device and method, it is related to ultrasonic equipment development field, the method includes ultrasonic host computer, switch switching control module, multiple transmission lines and multiple ultrasonic vibration heads;Ultrasonic host computer calculates the transmission decay variable of the transmission line corresponding to target ultrasonic vibration head, generates the initial driving signal of target ultrasonic vibration head based on the ideal driving signal of target ultrasonic vibration head and transmission decay variable, while generating control signal;Target ultrasonic vibration head is any one of multiple ultrasonic vibration heads;The transmission line corresponding to target ultrasonic vibration head is used to obtain the final driving signal of target ultrasonic vibration head, to remotely drive target ultrasonic vibration head;Switch switching control module opens the switch corresponding to target ultrasonic vibration head according to control signal.The application realizes the time-sharing driving of multiple remote ultrasonic vibration heads by single ultrasonic host computer, improves the efficiency of detection, and reduces equipment cost.

Description

Technical Field

[0001] This application relates to the field of ultrasonic equipment development, and in particular to a remote shared drive device and method for multiple ultrasonic transducers. Background Technology

[0002] Current ultrasonic sensing primarily operates on a one-to-one basis, requiring a dedicated ultrasonic transducer and transducer for each measurement point. This method has limitations for large workpieces requiring multi-point ultrasonic sensing, particularly in the following ways:

[0003] First, if multiple monitoring points need to be ultrasonically sensed simultaneously, multiple ultrasonic main units need to be deployed, making the entire ultrasonic detection system expensive.

[0004] Secondly, the sensing detection at each detection point requires manual operation, resulting in low detection efficiency and making it inconvenient for real-time online monitoring.

[0005] Furthermore, the ultrasonic transducer and its accompanying transducer should not be too far from the main unit. This is because ultrasonic drive signals, especially high-frequency drive signals, suffer from waveform distortion due to transmission line losses after long-distance transmission, severely reducing the driving efficiency of the ultrasonic transducer and shortening its lifespan. This limitation also restricts the realization of one-to-many remote ultrasonic drive.

[0006] Therefore, current ultrasonic sensing methods are fundamentally incapable of achieving large-scale distributed ultrasonic sensing. Furthermore, implementing online ultrasonic sensing is even less suitable for large workpieces in service. Summary of the Invention

[0007] The purpose of this application is to provide a remote shared driving device and method for multiple ultrasonic transducers, which can realize time-sharing driving of multiple remote ultrasonic transducers through a single ultrasonic host, thereby improving detection efficiency and reducing equipment costs.

[0008] To achieve the above objectives, this application provides the following solution:

[0009] In a first aspect, this application provides a remote shared drive device for multiple ultrasonic transducers, comprising: an ultrasonic main unit, a switch control module, multiple transmission lines, and multiple ultrasonic transducers;

[0010] The plurality of ultrasonic transducers are connected one-to-one with a plurality of transmission lines, and the plurality of transmission lines are all connected to the switch switching control module, which is connected to the ultrasonic main unit; the plurality of ultrasonic transducers are located at different positions.

[0011] The ultrasonic generator is used to calculate the transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer, generate the initial drive signal of the target ultrasonic transducer based on the ideal drive signal of the target ultrasonic transducer and the transmission attenuation variable, and generate a control signal at the same time; the target ultrasonic transducer is any one of a plurality of ultrasonic transducers.

[0012] The transmission line corresponding to the target ultrasonic transducer is used to transmit the initial drive signal to the target ultrasonic transducer to obtain the final drive signal of the target ultrasonic transducer, so as to remotely drive the target ultrasonic transducer.

[0013] The switch switching control module is used to turn on the switch corresponding to the target ultrasonic transducer according to the control signal.

[0014] Secondly, this application provides a remote shared driving method for multiple ultrasonic transducers, including:

[0015] Identify the target ultrasonic transducer;

[0016] The transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer is calculated by the ultrasonic transducer host. Based on the ideal drive signal of the target ultrasonic transducer and the transmission attenuation variable, the initial drive signal of the target ultrasonic transducer is generated, and the control signal is generated.

[0017] According to the control signal, the switch corresponding to the target ultrasonic transducer is turned on by switching the control module via a switch.

[0018] The initial drive signal is transmitted to the target ultrasonic transducer through the transmission line corresponding to the target ultrasonic transducer to obtain the final drive signal of the target ultrasonic transducer, so as to remotely drive the target ultrasonic transducer.

[0019] According to the specific embodiments provided in this application, this application has the following technical effects:

[0020] This application provides a remote shared driving device and method for multiple ultrasonic transducers. It calculates the transmission attenuation of the transmission line corresponding to the target ultrasonic transducer. Based on this, the initial driving signal of the target ultrasonic transducer is derived from its ideal driving signal. After the initial driving signal undergoes transmission attenuation through the transmission line, the final driving signal of the target ultrasonic transducer is obtained. This final driving signal approximates the ideal driving signal, thus better driving the target ultrasonic transducer. This solves the problem of distortion caused by remote transmission of the driving signal through the transmission line, reduces losses in the driving of the target ultrasonic transducer, and improves the driving speed of the target ultrasonic transducer. Furthermore, it utilizes a single ultrasonic host and a switch-changing control module to perform time-division control of multiple ultrasonic transducers, realizing remote one-to-many ultrasonic transducer driving, reducing manual operation and the number of ultrasonic hosts, improving detection efficiency, and saving costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a remotely shared drive device with multiple ultrasonic transducers provided in an embodiment of this application;

[0023] Figure 2 This is a flowchart illustrating a remote shared driving method for multiple ultrasonic transducers provided in an embodiment of this application.

[0024] Figure label:

[0025] Multiple ultrasonic transducers-1, switch-2, switch switching control module-3, ultrasonic main unit-4, power supply module-5. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] To make the objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In one exemplary embodiment, such as Figure 1 As shown, a remote shared drive device for multiple ultrasonic transducers is provided. The remote shared drive device for multiple ultrasonic transducers includes: an ultrasonic host 4, a switch switching control module 3, multiple transmission lines, and multiple ultrasonic transducers 1.

[0029] The plurality of ultrasonic transducers 1 are connected one-to-one with a plurality of transmission lines, and the plurality of transmission lines are all connected to the switch switching control module 3, which is connected to the ultrasonic host 4; the plurality of ultrasonic transducers 1 are located at different positions.

[0030] The ultrasonic host 4 is used to calculate the transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer, generate the initial drive signal of the target ultrasonic transducer based on the ideal drive signal of the target ultrasonic transducer and the transmission attenuation variable, and generate a control signal at the same time; the target ultrasonic transducer is any one of the multiple ultrasonic transducers 1.

[0031] The transmission line corresponding to the target ultrasonic transducer is used to transmit the initial drive signal to the target ultrasonic transducer to obtain the final drive signal of the target ultrasonic transducer, so as to remotely drive the target ultrasonic transducer.

[0032] The switch switching control module 3 is used to turn on the switch 2 corresponding to the target ultrasonic transducer according to the control signal. The switch switching control module 3 is a one-to-many type, single-pole multi-throw switch 2.

[0033] In another exemplary embodiment of this application, the initial driving signal is an initial adaptation waveform. The ultrasonic host 4 specifically includes: a transmission attenuation variable acquisition unit, a total compensation waveform acquisition unit, an initial adaptation waveform synthesis unit, and a control signal generation unit.

[0034] The transmission attenuation variable acquisition unit is used to calculate the transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer based on the length of the transmission line corresponding to the target ultrasonic transducer, the electrical parameters of the transmission line corresponding to the target ultrasonic transducer, and the parameters of the target ultrasonic transducer.

[0035] The total compensation waveform acquisition unit is connected to the transmission attenuation acquisition unit. The total compensation waveform acquisition unit is used to obtain the total compensation waveform of the target ultrasonic transducer based on the ideal driving signal of the target ultrasonic transducer and the transmission attenuation of the transmission line corresponding to the target ultrasonic transducer. The transmission line is a twisted pair cable or a coaxial cable.

[0036] The initial adaptation waveform synthesis unit is connected to the total compensation waveform acquisition unit. The initial adaptation waveform synthesis unit is used to synthesize an initial adaptation waveform that is consistent with the total compensation waveform of the target ultrasonic transducer using digital frequency synthesis technology.

[0037] The control signal generation unit is used to generate control signals.

[0038] When using digital frequency synthesis technology, the STM32F103C8T6 can be used as the main control chip, and the AD9851 digital frequency synthesizer can be used for implementation.

[0039] In this application, when the signal amplitude of the initial adaptive waveform synthesized by the control digital frequency synthesis technology is too small to reach the amplitude required for the final adaptive waveform, a waveform that is identical except for the amplitude is synthesized first.

[0040] In another exemplary embodiment of this application, the process of calculating the transmission attenuation of a sine wave of a certain frequency through a twisted pair of cables of length L is as follows:

[0041] The propagation constant of the transmission line is: Where R0 is the distributed resistance of the transmission line, L0 is the distributed inductance of the transmission line, C0 is the distributed capacitance of the transmission line, G0 is the distributed conductance of the transmission line, and the above are the distributed parameters per unit length of the transmission line. γ(f) is the propagation constant, j is the imaginary unit, and ω is the angular frequency.

[0042] According to transmission line theory, the transfer function is: Where L is the length of the twisted pair, H L (w) represents the transmission function value of the signal.

[0043] The characteristic impedance Z0(w) of the transmission line is:

[0044] Reflection coefficient Γ L (f) is: Among them, Z L Z0(f) is the load impedance at frequency f, and Z0(f) is the characteristic impedance at frequency f.

[0045] Without impedance matching, the signal generated by the ultrasonic host 4 may be reflected multiple times on the twisted pair. According to the transmission function and reflection coefficient mentioned above, the sum of the downlink waves from distance x = 0 to distance x = L is V. + x＝L Then the voltage V1 at point 4 of the ultrasonic host can be expressed as:

[0046] The load terminal voltage V2 can be expressed as:

[0047] The transmission attenuation of a sine wave with frequency f through a twisted pair of wires of length L is as follows:

[0048]

[0049] Where cosh[] represents the hyperbolic cosine function and sinh[] represents the hyperbolic sine function.

[0050] In another exemplary embodiment of this application, the total compensation waveform acquisition unit specifically includes: an ideal drive signal decomposition subunit, a basic compensation waveform acquisition subunit, and a total compensation waveform acquisition subunit.

[0051] The ideal drive signal decomposition subunit is used to decompose the ideal drive signal of the target ultrasonic transducer into multiple ideal drive sub-signals.

[0052] The basic compensation waveform acquisition subunit is connected to the ideal drive signal decomposition subunit. The basic compensation waveform acquisition subunit is used to back-calculate each ideal drive sub-signal based on multiple ideal drive sub-signals and the transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer, to obtain multiple basic compensation waveforms.

[0053] The total compensation waveform acquisition subunit is connected to the basic compensation waveform acquisition subunit, and the total compensation waveform acquisition subunit is used to synthesize multiple basic compensation waveforms into a total compensation waveform.

[0054] In this application, the ideal driving signal of the target ultrasonic transducer is a square wave, and the ideal driving sub-signal is a sine wave. Fourier transform is used to decompose the ideal driving signal of the target ultrasonic transducer into multiple ideal driving sub-signals. Furthermore, to achieve the best possible effect, the number of waveforms should be increased as much as possible; nine or more waveforms are sufficient to approximate a square wave. For a square wave with a duty cycle of 50%, frequency f, and amplitude A, the sine wave obtained by Fourier transform can be expressed as (ω = 2πf):

[0055]

[0056] Where n is the sequence number of different harmonics, t is the time, and f(t) represents a sine wave.

[0057] Taking any decomposed sine wave as an example, the calculation is as follows: The analytical model for twisted-pair cables needed at this point is: Among them, R, C, and L' are the analytical model parameters of twisted pair cables, and the values ​​of R, C, and L' are different for different specifications of twisted pair cables.

[0058] When the frequency of the sine wave is nf, the impedance of the ultrasonic transducer can be set to Z. L (nf)=(a-jb)Ω, where a and b are the real and imaginary parts of the ultrasonic transducer impedance. Generally, the characteristic impedance Z0=100Ω is taken.

[0059] The propagation constant γ(f) is prepared as follows:

[0060]

[0061] The reason is that the frequency of a sine wave is in the tens of megahertz or even higher, and when f >> 1:

[0062]

[0063] The decay H(nf) corresponding to a sine wave with frequency nf can be obtained as follows:

[0064]

[0065] Based on Euler's formula, H(nf) can be transformed into a calculation in the complex frequency domain, and the final result is:

[0066]

[0067] Let M be the real part of the denominator and N be the imaginary part, then:

[0068]

[0069] Where ∠-θ represents the amount of phase reduction, ω=2πnf.

[0070] Then for the expression is The sine wave needs to be based on the compensation waveform generated by the ultrasonic host 4.

[0071] Initial adaptation waveform f ‘ The expression for (t) is:

[0072] In another exemplary embodiment of this application, the multi-ultrasonic transducer remote shared drive device further includes: a power supply module 5, connected to the ultrasonic host 4 and the switch switching control module 3, for supplying power to the ultrasonic host 4 and the switch switching control module 3.

[0073] The significant advantages of this invention are: (1) One power supply module 5 can drive a large number of ultrasonic transducers to detect the state of the target, and can quickly and efficiently switch the target ultrasonic transducers, thus improving the detection efficiency; (2) The whole does not require too many equipment or compensation devices, and the demand for manpower is also reduced, thus reducing manpower costs, economic costs, and time costs; (3) It can lay the foundation for more subsequent state detection, prediction and other expansion measures, and has more room for utilization.

[0074] In another exemplary embodiment of this application, when the waveform to be synthesized may exceed the frequency range synthesized by digital frequency synthesis technology, but a more ideal effect is desired, frequency conversion technology can be considered to achieve the purpose of synthesis.

[0075] Based on the same inventive concept, such as Figure 2 As shown in the figure, this application embodiment also provides a remote shared driving method for multiple ultrasonic transducers, which includes the following steps 201 to 204.

[0076] Step 201: Determine the target ultrasonic transducer.

[0077] Step 202: Calculate the transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer using the ultrasonic host 4; generate the initial drive signal of the target ultrasonic transducer based on the ideal drive signal of the target ultrasonic transducer and the transmission attenuation variable; and generate the control signal.

[0078] Step 203: According to the control signal, the switch corresponding to the target ultrasonic transducer is turned on by switching control module 3.

[0079] Step 204: The initial drive signal is transmitted to the target ultrasonic transducer through the transmission line corresponding to the target ultrasonic transducer to obtain the final drive signal of the target ultrasonic transducer, so as to remotely drive the target ultrasonic transducer.

[0080] As an optional implementation, the multi-ultrasonic transducer remote shared driving method further includes:

[0081] The initial drive signal information of the target ultrasonic transducer is stored in a table, so that the initial drive signal of the target ultrasonic transducer is generated again based on the initial drive signal information of the target ultrasonic transducer stored in the table.

[0082] As an optional implementation, step 202 specifically includes steps 301 to 303.

[0083] Step 301: Calculate the transmission attenuation of the transmission line corresponding to the target ultrasonic transducer based on the length of the transmission line, the electrical parameters of the transmission line, and the parameters of the target ultrasonic transducer.

[0084] Step 302: Based on the ideal driving signal of the target ultrasonic transducer and the transmission attenuation of the transmission line corresponding to the target ultrasonic transducer, the total compensation waveform of the target ultrasonic transducer is obtained.

[0085] Step 303: Based on the total compensation waveform, an initial adaptation waveform consistent with the total compensation waveform of the target ultrasonic transducer is synthesized using digital frequency synthesis technology, and a control signal is generated.

[0086] As an optional implementation, step 301 specifically includes steps 401 to 403.

[0087] Step 401: Decompose the ideal driving signal of the target ultrasonic transducer into multiple ideal driving sub-signals.

[0088] Step 402: Based on multiple ideal driving sub-signals and the transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer, reverse the calculation of each ideal driving sub-signal to obtain multiple basic compensation waveforms.

[0089] Step 403: Based on multiple basic compensation waveforms, synthesize the total compensation waveform of the target ultrasonic transducer.

[0090] This invention proposes a one-to-many remote driving method for ultrasonic transducers, which not only facilitates the realization of distributed online ultrasonic sensing modes based on ultrasound, but also significantly reduces the number of ultrasonic driving hosts, effectively lowering the cost of ultrasonic monitoring systems and greatly improving the efficiency of ultrasonic detection operations.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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, they should be considered to be within the scope of this specification.

[0092] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A remote-shared drive device for multiple ultrasonic transducers, characterized in that, The multi-ultrasonic transducer remote shared drive device includes: an ultrasonic main unit, a switch control module, multiple transmission lines, and multiple ultrasonic transducers. The plurality of ultrasonic transducers are connected one-to-one with a plurality of transmission lines, and the plurality of transmission lines are all connected to the switch switching control module, which is connected to the ultrasonic main unit; the plurality of ultrasonic transducers are located at different positions. The ultrasonic generator is used to calculate the transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer, generate the initial drive signal of the target ultrasonic transducer based on the ideal drive signal of the target ultrasonic transducer and the transmission attenuation variable, and generate a control signal at the same time; the target ultrasonic transducer is any one of a plurality of ultrasonic transducers. The transmission line corresponding to the target ultrasonic transducer is used to transmit the initial drive signal to the target ultrasonic transducer to obtain the final drive signal of the target ultrasonic transducer, so as to remotely drive the target ultrasonic transducer. The switch switching control module is used to turn on the switch corresponding to the target ultrasonic transducer according to the control signal.

2. The multi-ultrasonic transducer remote shared drive device according to claim 1, characterized in that, The initial drive signal is the initial adaptation waveform; The ultrasonic host specifically includes: The transmission attenuation variable acquisition unit is used to calculate the transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer based on the length of the transmission line corresponding to the target ultrasonic transducer, the electrical parameters of the transmission line corresponding to the target ultrasonic transducer, and the parameters of the target ultrasonic transducer. The total compensation waveform acquisition unit is connected to the transmission attenuation acquisition unit and is used to obtain the total compensation waveform of the target ultrasonic transducer based on the ideal driving signal of the target ultrasonic transducer and the transmission attenuation of the transmission line corresponding to the target ultrasonic transducer. An initial adaptation waveform synthesis unit is connected to the total compensation waveform acquisition unit and is used to synthesize an initial adaptation waveform that is consistent with the total compensation waveform of the target ultrasonic transducer using digital frequency synthesis technology. The control signal generation unit is used to generate control signals.

3. The multi-ultrasonic transducer remote shared drive device according to claim 2, characterized in that, The total compensation waveform acquisition unit specifically includes: An ideal drive signal decomposition subunit is used to decompose the ideal drive signal of the target ultrasonic transducer into multiple ideal drive sub-signals; The basic compensation waveform acquisition subunit is connected to the ideal drive signal decomposition subunit. It is used to back-calculate each ideal drive sub-signal based on multiple ideal drive sub-signals and the transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer to obtain multiple basic compensation waveforms. The total compensation waveform acquisition subunit is connected to the basic compensation waveform acquisition subunit and is used to synthesize multiple basic compensation waveforms into a total compensation waveform.

4. The multi-ultrasonic transducer remote shared drive device according to claim 1, characterized in that, The transmission line is a twisted pair cable.

5. The multi-ultrasonic transducer remote shared drive device according to claim 1, characterized in that, The multi-ultrasonic transducer remote shared drive device further includes a power supply module, which is connected to the ultrasonic host and the switch switching control module, and is used to supply power to the ultrasonic host and the switch switching control module.

6. A remote shared driving method for multiple ultrasonic transducers, applied to the remote shared driving device for multiple ultrasonic transducers as described in any one of claims 1-5, characterized in that, The remote shared driving method for multiple ultrasonic transducers includes: Identify the target ultrasonic transducer; The transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer is calculated by the ultrasonic transducer host. Based on the ideal drive signal of the target ultrasonic transducer and the transmission attenuation variable, the initial drive signal of the target ultrasonic transducer is generated, and the control signal is generated. According to the control signal, the switch corresponding to the target ultrasonic transducer is turned on by switching the control module via a switch. The initial drive signal is transmitted to the target ultrasonic transducer through the transmission line corresponding to the target ultrasonic transducer to obtain the final drive signal of the target ultrasonic transducer, so as to remotely drive the target ultrasonic transducer.

7. The remote shared driving method for multiple ultrasonic transducers according to claim 6, characterized in that, The remote shared driving method for multiple ultrasonic transducers also includes: The initial drive signal information of the target ultrasonic transducer is stored in a table, so that the initial drive signal of the target ultrasonic transducer is generated again based on the initial drive signal information of the target ultrasonic transducer stored in the table.

8. The remote shared driving method for multiple ultrasonic transducers according to claim 6, characterized in that, The transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer is calculated by the ultrasonic transducer host. Based on the ideal drive signal of the target ultrasonic transducer and the transmission attenuation variable, an initial drive signal for the target ultrasonic transducer is generated, and a control signal is generated, specifically including: Based on the length of the transmission line corresponding to the target ultrasonic transducer, the electrical parameters of the transmission line corresponding to the target ultrasonic transducer, and the parameters of the target ultrasonic transducer, the transmission attenuation of the transmission line corresponding to the target ultrasonic transducer is calculated. Based on the ideal driving signal of the target ultrasonic transducer and the transmission attenuation of the transmission line corresponding to the target ultrasonic transducer, the total compensation waveform of the target ultrasonic transducer is obtained. Based on the total compensation waveform, an initial adaptation waveform consistent with the total compensation waveform of the target ultrasonic transducer is synthesized using digital frequency synthesis technology, and a control signal is generated.

9. The remote shared driving method for multiple ultrasonic transducers according to claim 8, characterized in that, Based on the ideal driving signal of the target ultrasonic transducer and the transmission attenuation of the transmission line corresponding to the target ultrasonic transducer, the total compensation waveform of the target ultrasonic transducer is obtained, specifically including: The ideal driving signal of the target ultrasonic transducer is decomposed into multiple ideal driving sub-signals; Based on multiple ideal driving sub-signals and the transmission attenuation variable of the transmission line corresponding to the target ultrasonic transducer, multiple basic compensation waveforms are obtained by back-calculating each ideal driving sub-signal. The total compensation waveform of the target ultrasonic transducer is synthesized based on multiple basic compensation waveforms.

10. The remote shared driving method for multiple ultrasonic transducers according to claim 9, characterized in that, The ideal driving signal of the target ultrasonic transducer is decomposed into multiple ideal driving sub-signals, specifically including: The ideal driving signal of the target ultrasonic transducer is decomposed into multiple ideal driving sub-signals using Fourier transform.

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