Transmitting device of ultrasonic transducer and ultrasonic transducer system

Abstract

The invention provides a transmitting device of an ultrasonic transducer and an ultrasonic transducer system. In the transmitting device, an ultrasonic excitation module is used for transmitting a controllable waveform excitation signal; the ultrahigh-voltage adjustable module is used for realizing adjustable output of ultrahigh voltage; the reverse protection module is used for performing direct current isolation on the ultrahigh voltage and the ultrasonic excitation module and transmitting a waveform excitation signal to the emission mode gating module; the ultra-high-voltage bias applying module is used for applying ultra-high voltage to the waveform excitation signal output by the reverse protection module to form an ultrasonic excitation signal with ultra-high-voltage bias; and the transmitting mode gating module is used for outputting an ultrasonic excitation signal with or without ultrahigh pressure bias to the ultrasonic transducer. The transmitting device can realize ultrahigh-voltage direct-current bias, bias parameters are adjustable and controllable, an arbitrary waveform transmitting scheme can be controlled, full compatibility and full coverage of various types of ultrasonic transducers are realized, and the use cost is low.

Description

Technical Field

[0001] The present application relates to the field of ultrasonic transducers, and in particular to a transmitting device of an ultrasonic transducer and an ultrasonic transducer system. Background Art

[0002] In recent years, flexible wearable ultrasound technology is becoming a revolutionary force in the field of medical imaging detection. Among them, wearable ultrasound transducers need to be both flexible and high-performance, which is often a major challenge in design. Traditional ultrasound transducers based on piezoelectric ceramics or single crystals are rigid, while transducers based on flexible piezoelectric materials are difficult to meet the requirements.

[0003] There is a modified PVDF flexible piezoelectric material in the prior art, which can exhibit piezoelectric performance comparable to that of traditional piezoelectric ceramics under ultra-high voltage (above 10KV) DC bias conditions, and is expected to achieve a breakthrough in wearable ultrasonic transducer technology. However, the traditional ultrasonic transmitting circuit used for piezoelectric transducers does not have a high-voltage bias circuit. In recent years, the high-voltage bias circuit used in the ultrasonic transmitting circuit of the capacitive micromechanical ultrasonic transducer (CMUT) can only achieve a high voltage of about 100V because of the conventional DC / DC boost scheme, which is difficult to meet the demand. Although the modified PVDF flexible piezoelectric material can exhibit piezoelectric performance comparable to that of traditional piezoelectric ceramics under ultra-high voltage DC bias conditions, it needs to apply an ultra-high voltage bias of tens of thousands of volts to achieve optimal performance when used.

[0004] Therefore, the existing technology has the following disadvantages: the transmitting circuit for piezoelectric ultrasonic transducers cannot provide high-voltage bias and cannot be used for capacitive micromechanical ultrasonic transducers and flexible ultrasonic transducers; the transmitting circuit for capacitive micromechanical ultrasonic transducers can only achieve a high-voltage bias of tens of volts, which does not meet the demand for the tens of thousands of volts of ultra-high voltage bias required by flexible ultrasonic transducers, and is limited by the disadvantages such as the unadjustable bias high voltage, so the usage scenarios are still greatly restricted. Summary of the invention

[0005] Based on the problems existing in the prior art, the present application provides an ultrasonic transducer transmitting device and an ultrasonic transducer system. The specific scheme is as follows:

[0006] A transmitting device for an ultrasonic transducer, used for realizing ultrasonic excitation with ultra-high voltage DC bias for the ultrasonic transducer, the transmitting device comprising an ultrasonic excitation module, an ultra-high voltage adjustable module, a reverse protection module, an ultra-high voltage bias applying module and a transmitting mode gating module;

[0007] The ultrasonic excitation module is used to emit a controllable waveform excitation signal;

[0008] The ultra-high voltage adjustable module is used to achieve an adjustable output of ultra-high voltage;

[0009] The reverse protection module is used to isolate the ultra-high voltage from the ultrasonic excitation module by direct current, and transmit the waveform excitation signal to the transmission mode selection module;

[0010] The ultra-high voltage bias application module is used to apply the ultra-high voltage to the waveform excitation signal output by the reverse protection module to form an ultrasonic excitation signal with an ultra-high voltage bias;

[0011] The transmission mode selection module is used to output an ultrasonic excitation signal with or without an ultra-high voltage bias to the ultrasonic transducer.

[0012] In some specific embodiments, it also includes:

[0013] A programmable control module is communicatively connected to the ultrasonic excitation module, the ultrahigh voltage adjustable module and the emission mode selection module, and is used for:

[0014] Generate a voltage control signal involving a working sequence according to preset requirements and transmit it to the ultrasonic excitation module, so that the ultrasonic excitation module generates a waveform excitation signal according to the voltage control signal;

[0015] Generate a voltage regulation control instruction according to preset requirements and transmit it to the ultra-high voltage adjustable module, so that the ultra-high voltage adjustable module adjusts the ultra-high voltage output according to the voltage regulation control instruction;

[0016] A gating signal is generated according to preset requirements and transmitted to the transmission mode gating module, so that the transmission mode gating module outputs an ultrasonic excitation signal with or without an ultra-high voltage bias according to the gating signal.

[0017] In some specific embodiments, the ultrasonic excitation module specifically includes:

[0018] A digital-to-analog conversion module, used to receive the voltage control signal and output a corresponding analog voltage according to the voltage control signal;

[0019] The operational amplifier amplification module is used to perform operational amplifier amplification on the analog voltage to obtain a waveform excitation signal adapted to the ultrasonic transducer.

[0020] In some specific embodiments, the ultra-high voltage adjustable module specifically includes:

[0021] A reference voltage module, used for outputting a reference voltage according to the voltage regulation control instruction;

[0022] A transformer module, used for boosting the reference voltage by a corresponding amplitude to obtain a quasi-ultra-high voltage;

[0023] The voltage doubling filter module is used to convert the quasi-ultra-high voltage output by the transformer module from alternating current to direct current and filter it to obtain an adjustable output ultra-high voltage.

[0024] In some specific embodiments, an ultra-high voltage capacitor is provided in the reverse protection module, and the ultra-high voltage capacitor is used to isolate the ultra-high voltage from the ultrasonic excitation module by direct current, and allows the waveform excitation electrical signal to still pass normally.

[0025] In some specific embodiments, a protection device is further provided in the reverse protection module, and the protection device and the ultra-high voltage capacitor form a double protection for the ultrasonic excitation module;

[0026] When the ultra-high voltage capacitor can effectively isolate DC, the protection device exhibits a high-impedance state; when the ultra-high voltage capacitor cannot effectively isolate DC, the protection device conducts the dangerous voltage to the ground, thereby forming secondary protection for the ultrasonic excitation module.

[0027] In some specific embodiments, a conducting device is provided in the ultra-high voltage bias applying module;

[0028] The ultra-high voltage output by the ultra-high voltage adjustable module passes through the conductive device and is applied to the waveform excitation signal output by the reverse protection module to form an ultrasonic excitation signal with an ultra-high voltage bias.

[0029] In some specific embodiments, a switch device is provided in the emission mode gating module;

[0030] The programmable control module outputs the selection signal to the switch device, thereby controlling the switch device to output an ultrasonic excitation signal with or without an ultra-high voltage bias.

[0031] In some specific embodiments, the protection device includes a varistor or a diode.

[0032] In some specific embodiments, the conductive device includes a low internal resistance inductor or a diode.

[0033] In some specific embodiments, the switching device includes a high-voltage relay or a high-voltage switch.

[0034] An ultrasonic transducer system comprises an ultrasonic transducer and any one of the above-mentioned transmitting devices, wherein the transducer array of the ultrasonic transducer is a single array element or multiple array elements; and the transmitting device is connected to the ultrasonic transducer.

[0035] Beneficial effects: This application proposes an ultrasonic transducer transmitting device and an ultrasonic transducer system. The transmitting device can realize ultra-high voltage DC bias, and the bias parameters are adjustable and controllable. It can control any waveform transmission scheme, realize full compatibility and full coverage of various types of ultrasonic transducers, and has low use cost. The overall volume of the transmitting device can be reduced, and it can be applied to wearable flexible ultrasonic transducers, expanding the diversification of applications.

[0036] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic diagram of the module relationship of the transmitting device of the present application;

[0039] Figure 2 It is a module schematic diagram of the ultrasonic excitation module of the present application;

[0040] Figure 3 It is a partial circuit diagram of the ultrasonic excitation module of the present application;

[0041] Figure 4 It is a module schematic diagram of the ultra-high voltage adjustable module of the present application;

[0042] Figure 5 It is a partial circuit diagram of the ultra-high voltage adjustable module of the present application;

[0043] Figure 6 It is a partial circuit diagram of the reverse protection module of the present application;

[0044] Figure 7 It is a partial circuit diagram of the ultra-high voltage bias application module of the present application;

[0045] Figure 8 is a schematic diagram of the present application before and after applying an ultra-high voltage bias;

[0046] Fig. 9 It is a schematic diagram of the principle of the transmission mode selection module of the present application.

[0047] Figure numerals: 1 - ultrasonic excitation module; 2 - ultra-high voltage adjustable module; 3 - reverse protection module; 4 - ultra-high voltage bias application module; 5 - emission mode selection module; 6 - programmable control module; 7 - ultrasonic transducer. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] This application proposes a transmitting device for an ultrasonic transducer, which can realize flexible adjustment of ultra-high voltage bias voltage and is compatible with different types of ultrasonic transducers. The module diagram of the two-dimensional array transducer is shown in the attached figure. Figure 1 The modules are shown in the attached Figure 2-9 The specific plan is as follows:

[0050] A transmitting device of an ultrasonic transducer 7 is used to realize ultra-high voltage DC bias for the ultrasonic transducer 7. The transmitting device comprises an ultrasonic excitation module 1, an ultra-high voltage adjustable module 2, a reverse protection module 3, an ultra-high voltage bias applying module 4 and a transmitting mode selection module 5.

[0051] Among them, the ultrasonic excitation module 1 is used to emit a controllable arbitrary waveform excitation signal. To achieve compatibility with various types of ultrasonic transducers 7, the traditional method of emitting excitation signals by controlling the conduction of field effect tubes cannot meet the requirements. This application adopts a programmable control digital-to-analog conversion chip to emit excitation signals in any form. It should be noted that the arbitrary waveform generated by the ultrasonic excitation module 1 is an important link in achieving compatibility with various types of ultrasonic transducers 7. The waveform excitation signal can directly go to the emission mode selection module to become an ultrasonic excitation signal without ultra-high voltage bias, or it can be processed later to become an ultrasonic excitation signal with ultra-high voltage bias.

[0052] Among them, the ultra-high voltage adjustable module 2 is used to achieve ultra-high voltage adjustable output. A single bias voltage cannot meet the use scenarios of various types of ultrasonic transducers 7. The present invention adopts a programmable control multi-tap transformer and an adjustable reference voltage to achieve ultra-high voltage adjustable output. It should be noted that the ultra-high voltage adjustable module 2 can generate ultra-high voltage and is adjustable in multiple gears, which is compatible with various types of ultrasonic transducers 7, while the traditional solution cannot achieve an ultra-high voltage bias of tens of thousands of volts.

[0053] Among them, the reverse protection module 3 is used to isolate the ultra-high voltage from the ultrasonic excitation module 1 by direct current, and transmit the waveform excitation signal to the transmission mode selection module 5. If the ultra-high voltage used for biasing is not isolated and protected, it is easy to reversely damage the ultrasonic excitation module 1. The present invention adopts a circuit with an ultra-high voltage capacitor as the core to realize reverse protection of ultra-high voltage bias, which has strong application value and protection value in practical applications.

[0054] Among them, the ultra-high voltage bias application module is used to apply ultra-high voltage to the waveform excitation signal output by the reverse protection module 3 to form an ultrasonic excitation signal with ultra-high voltage bias. After the ultra-high voltage adjustable output, how to apply it to the transmission path of the ultrasonic transducer 7 is extremely important. Undesirable methods will cause great loss and interference. This application adopts a circuit with low internal resistance inductors as the core to realize the bias application of the ultrasonic transducer 7.

[0055] Among them, the transmission mode selection module 5 is used to output an ultrasonic excitation signal with or without an ultra-high voltage bias to the ultrasonic transducer 7. The output of the present application can be an unbiased emission directly emitted by the ultrasonic excitation module 1, or a biased emission after applying an ultra-high voltage, and the selection of the two is programmable.

[0056] In some specific embodiments, the transmitting device further includes: a programmable control module 6, which is communicatively connected to the ultrasonic excitation module 1, the ultrahigh voltage adjustable module 2 and the emission mode selection module 5, and is used to: generate a voltage control signal involving a working sequence according to a preset requirement and transmit it to the ultrasonic excitation module 1, so that the ultrasonic excitation module 1 generates a waveform excitation signal according to the voltage control signal; generate a voltage regulation control instruction according to a preset requirement and transmit it to the ultrahigh voltage adjustable module 2, so that the ultrahigh voltage adjustable module 2 performs ultrahigh voltage output adjustment according to the voltage regulation control instruction; generate a selection signal according to a preset requirement and transmit it to the emission mode selection module 5, so that the emission mode selection module 5 outputs an ultrasonic excitation signal with or without an ultrahigh voltage bias according to the selection signal. In practical applications, the programmable control module 6 can be implemented by a variety of devices and design languages ​​such as a field programmable gate array or a single-chip microcomputer.

[0057] In some specific embodiments, the ultrasonic excitation module 1 specifically includes: a digital-to-analog conversion module, which is used to receive a voltage control signal and output a corresponding analog voltage according to the voltage control signal; and an operational amplifier module, which is used to perform operational amplifier amplification on the analog voltage to obtain a waveform excitation signal adapted to the ultrasonic transducer 7. For example, Figure 2 As shown, the ultrasonic excitation module 1 is composed of three parts: an analog-to-digital conversion module, an operational amplifier module, and a transmission denoising module.

[0058] The programmable control module 6 sends a voltage control word to the digital-to-analog conversion module, and the digital-to-analog conversion module outputs the corresponding analog voltage after receiving the voltage control word. The programmable control module 6 can send voltage control words of various working sequences according to various requirements, thereby realizing continuous dynamic control of analog voltage in any form. After amplification by the operational amplifier and transmission denoising, an ultrasonic excitation signal of any waveform form can be output.

[0059] Specifically, Figure 3 As shown, the programmable control module 6 sends CLK, WRT, and DATA to the digital-to-analog conversion module (DAC), CLK is the working clock of the DAC, WRT is the write enable signal of the DAC, and DATA is the write data bus of the DAC. During the effective period of WRT enable, the voltage control word of DATA is sent according to the conversion rate of the CLK working clock, so that the DAC outputs the analog voltage set for conversion. After the analog voltage is amplified by the two-stage operational amplifier LV-Buffer and HV-AMP, the output is an excitation signal suitable for the ultrasonic transducer 7, and then passes through the filter circuit composed of inductor L1, resistor R1, and capacitor C5 to achieve denoising of the ultrasonic excitation signal. Among them, the capacitors C1, C2, C3, and C4 in the circuit play the role of isolating direct current and passing alternating current in the transmission path; VDD and VSS are low-voltage power supplies for powering the DAC and LV-Buffer; VPP and VNN are high-voltage power supplies for powering the HV-AMP.

[0060] In some specific embodiments, the ultra-high voltage adjustable module 2 specifically includes: a reference voltage module, which is used to output a reference voltage according to a voltage regulation control instruction; a transformer module, which is used to boost the reference voltage by a corresponding amplitude to obtain a quasi-ultra-high voltage; a voltage doubling filter module, which is used to convert the quasi-ultra-high voltage output by the transformer module from alternating current to direct current and filter it to obtain an adjustable output ultra-high voltage. In some embodiments, the ultra-high voltage adjustable module 2 also includes a sampling monitoring module, which collects the output voltage. After the programmable control module 6 reads the output voltage, it can accurately correct the control word of the reference voltage. For example, as shown in the attached figure, Figure 4 As shown, the ultra-high voltage adjustable module 2 consists of five parts: adjustable reference voltage, tap selection, multi-tap transformer, voltage doubling filter, and sampling monitoring.

[0061] The programmable control module 6 sends a voltage regulation control instruction to the adjustable voltage reference voltage module, and the voltage output by the reference voltage module is a relatively low voltage. After the reference voltage passes through the transformer, it can be boosted by a corresponding amplitude according to the turns ratio of the primary winding and the secondary winding. After passing through the voltage doubling filter module and the sampling monitoring module, a large-scale multi-gear high-precision ultra-high voltage adjustable output can be achieved. The function of the voltage doubling filter module is to convert the alternating current of the transformer into direct current after boost filtering.

[0062] Exemplarily, the transformer module of the present application adopts a multi-tap transformer with multiple turns settings, and the tap selection is controlled by the programmable control module 6 to perform multi-level adjustment.

[0063] Specifically, Figure 5 As shown, the programmable control module 6 sends a voltage regulation control command to the reference voltage module composed of M1, M2, and M3, where M1 and M2 are field effect transistors, and M3 is an inverter. The control command is directly given to pin 1 of M1 and to pin 1 of M2 via M3. Pins 2 of M1 and M2 are respectively connected to pins a and c of the primary winding of the multi-tap transformer T1, pins 3 of M1 and M2 are connected to V-, and pin b of T1 is connected to V+. The secondary winding of T1 has multiple taps d, e, f, g, and h, of which e, f, g, and h enter the multi-speed selection module. The module is controlled by the programmable control module 6 and performs four-select tap selection. Different tap selections are different turns ratios of the transformer module, corresponding to optional output values ​​of multiple gears. After the gear is selected, the boost output of T1 formed with d enters the voltage doubling filter module. In the attached Figure 5 The voltage doubling filter module composed of C1, C2, D1, and D2, that is, the part shown in the dotted box, can be repeatedly connected in series in multiple stages as needed to obtain a higher voltage output. The LC filter module composed of L1 and C3 can filter out noise, and the output after filtering is an ultra-high voltage adjustable output. In order to set the ultra-high voltage output value more accurately, the present application performs precision resistor voltage division on the output by R1 and R2, and after the voltage division, it enters the sampling monitoring module for sampling, and the sampling results are fed back to the programmable control module 6. The programmable control module 6 can adjust the output high voltage according to the monitoring results.

[0064] In some specific embodiments, an ultra-high voltage capacitor is provided in the reverse protection module 3, and the ultra-high voltage capacitor is used to isolate the ultra-high voltage from the ultrasonic excitation module 1 by direct current, and allow the waveform excitation electrical signal to still pass normally. Furthermore, a protective device is also provided in the reverse protection module 3, and the protective device and the ultra-high voltage capacitor form a double protection for the ultrasonic excitation module 1; when the ultra-high voltage capacitor can effectively isolate the DC, the protective device exhibits a high-impedance state; when the ultra-high voltage capacitor cannot effectively isolate the DC, the protective device conducts the dangerous voltage to the ground, thereby forming a secondary protection for the ultrasonic excitation module 1. In some specific embodiments, the protective device includes a varistor or a diode. The principle of the reverse protection module 3 is as shown in the attached figure. Figure 6 shown.

[0065] Take the varistor as a protective device as an example. The function of the ultra-high voltage capacitor is to isolate the ultra-high voltage of tens of thousands of volts from the arbitrary waveform ultrasonic excitation module 1 by direct current, while the waveform excitation signal emitted by the ultrasonic excitation module 1 can still pass normally. The role of the varistor is the secondary protection after the ultra-high voltage capacitor. When the ultra-high voltage capacitor can achieve effective isolation, the varistor exhibits a high-resistance state and will not affect the normal operation of the arbitrary waveform ultrasonic excitation module 1; when the ultra-high voltage capacitor fails for extreme reasons, the varistor will respond in a very short time and conduct the dangerous voltage to the ground, thereby forming a secondary protection for the arbitrary waveform ultrasonic excitation module 1.

[0066] The reverse protection module 3 ensures the safe transmission of the arbitrary waveform ultrasonic excitation signal to the next level. The input is a waveform excitation signal, and the output is also a waveform excitation signal. No functional changes are made to the signal. It is a key circuit protection measure of this application.

[0067] In some specific embodiments, a conduction device is provided in the ultra-high voltage bias application module 4; the ultra-high voltage output by the ultra-high voltage adjustable module 2 passes through the conduction device and is applied to the waveform excitation signal output by the reverse protection module 3 to form an ultrasonic excitation signal with an ultra-high voltage bias. In some specific embodiments, the conduction device includes a low internal resistance inductor or a diode. The principle of the ultra-high voltage bias application module 4 is as shown in the attached figure. Figure 7 shown.

[0068] Take a low internal resistance inductor as a conduction device as an example. Figure 8 It is a schematic diagram before and after applying the ultra-high voltage bias. Before the application, the example is the ±60V excitation signal output by the arbitrary waveform ultrasonic excitation module 1, and the signal fluctuates around 0V. After the ultra-high voltage bias is applied, the original 0V baseline voltage is raised to 10000V in the example, and the original +60V positive peak value becomes 10000V+60V=10060V, and the original -60V negative peak value becomes 10000V-60V=9940V, and continues to fluctuate around the ultra-high voltage bias of 10000V by ±60V.

[0069] The traditional way to apply high voltage bias is to use a pull-up resistor, but the pull-up resistor method will form a voltage difference across the resistor and cause heat loss and thermal noise. The characteristics of low internal resistance inductors are more suitable for applying ultra-high voltage bias.

[0070] The present application can switch between biased transmission and unbiased transmission. In some specific embodiments, a switch device is provided in the transmission mode selection module 5; the programmable control module 6 outputs a selection signal to the switch device, thereby controlling the switch device to output an ultrasonic excitation signal with or without an ultra-high voltage bias. The principle of the transmission mode selection module 5 is as shown in the attached figure. Fig. 9As shown. In some specific embodiments, the switch device includes a high-voltage relay or a high-voltage switch. The programmable control module 6 sends a selection signal to control the closing of the high-voltage relay contacts, and selects whether there is a biased transmission output to the ultrasonic transducer 7. When one of the paths is selected, the other path is turned off. Unbiased transmission is a waveform excitation signal output by the ultrasonic excitation module 1. Biased transmission is the output signal after the ultra-high voltage bias application module 4 applies ultra-high voltage to the output of the reverse protection module 3.

[0071] Compatibility with other types of ultrasonic transducers 7 can be achieved through transmission mode selection. Special designs are also made in details such as ultra-high voltage bias application and reverse protection to achieve a small-sized ultrasonic transmission circuit with ultra-high voltage DC bias that can be used for wearable ultrasonic transducer 7.

[0072] In some embodiments, a combination of a miniaturized multi-tap transformer + tap selection + adjustable reference voltage can provide the flexible ultrasonic transducer 7 with an ultra-high voltage DC bias of tens of thousands of volts and adjustable in multiple gears, thereby maximizing the piezoelectric properties of the modified PVDF flexible piezoelectric material under ultra-high voltage DC bias.

[0073] The present application also proposes an ultrasonic transducer system, comprising an ultrasonic transducer and any of the above-mentioned transmitting devices, wherein the transducer array of the ultrasonic transducer is a single array element or multiple array elements; and the transmitting device is connected to the ultrasonic transducer.

[0074] This application proposes a transmitting device and an ultrasonic transducer system for an ultrasonic transducer. The transmitting device can realize ultra-high voltage DC bias, and the bias parameters are adjustable and controllable. It can control any waveform transmission scheme, realize full compatibility and full coverage of various types of ultrasonic transducers, and has low use cost. The overall volume of the transmitting device can be reduced, and it can be applied to wearable flexible ultrasonic transducers, expanding the diversification of applications.

[0075] Those skilled in the art should understand that the modules of the present application described above can be implemented by a general-purpose computing system, they can be concentrated on a single computing system, or distributed on a network composed of multiple computing systems, and optionally, they can be implemented by program codes executable by a computer system, so that they can be stored in a storage system and executed by the computing system, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0076] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

[0077] The above disclosure only discloses several specific implementation scenarios of the present application. However, the present application is not limited thereto, and any changes that can be conceived by technicians in this field should fall within the scope of protection of the present application.

Claims

1. A transmitting device of an ultrasonic transducer, characterized in that: Used to realize ultrasonic excitation with ultra-high voltage DC bias for ultrasonic transducers, the transmitting device includes an ultrasonic excitation module, an ultra-high voltage adjustable module, a reverse protection module, an ultra-high voltage bias application module and a transmitting mode selection module; The ultrasonic excitation module is used to emit a controllable waveform excitation signal; The ultra-high voltage adjustable module is used to achieve an adjustable output of ultra-high voltage; The reverse protection module is used to isolate the ultra-high voltage from the ultrasonic excitation module by direct current, and transmit the waveform excitation signal to the transmission mode selection module; The ultra-high voltage bias application module is used to apply the ultra-high voltage to the waveform excitation signal output by the reverse protection module to form an ultrasonic excitation signal with an ultra-high voltage bias; The transmission mode selection module is used to output an ultrasonic excitation signal with or without an ultra-high voltage bias to the ultrasonic transducer.

2. The transmitting device according to claim 1, characterized in that: Also includes: A programmable control module is communicatively connected to the ultrasonic excitation module, the ultrahigh voltage adjustable module and the emission mode selection module, and is used for: Generate a voltage control signal involving a working sequence according to preset requirements and transmit it to the ultrasonic excitation module, so that the ultrasonic excitation module generates a waveform excitation signal according to the voltage control signal; Generate a voltage regulation control instruction according to preset requirements and transmit it to the ultra-high voltage adjustable module, so that the ultra-high voltage adjustable module adjusts the ultra-high voltage output according to the voltage regulation control instruction; A gating signal is generated according to preset requirements and transmitted to the transmission mode gating module, so that the transmission mode gating module outputs an ultrasonic excitation signal with or without an ultra-high voltage bias according to the gating signal.

3. The transmitting device according to claim 2, characterized in that: The ultrasonic excitation module specifically includes: A digital-to-analog conversion module, used to receive the voltage control signal and output a corresponding analog voltage according to the voltage control signal; The operational amplifier amplification module is used to perform operational amplifier amplification on the analog voltage to obtain a waveform excitation signal adapted to the ultrasonic transducer.

4. The transmitting device according to claim 2, characterized in that: The ultra-high voltage adjustable module specifically includes: A reference voltage module, used for outputting a reference voltage according to the voltage regulation control instruction; A transformer module, used for boosting the reference voltage by a corresponding amplitude to obtain a quasi-ultra-high voltage; The voltage doubling filter module is used to convert the quasi-ultra-high voltage output by the transformer module from alternating current to direct current and filter it to obtain an adjustable output ultra-high voltage.

5. The transmitting device according to claim 1, characterized in that: The reverse protection module is provided with an ultra-high voltage capacitor, which is used to isolate the ultra-high voltage from the ultrasonic excitation module by direct current and allows the waveform excitation electrical signal to pass normally.

6. The transmitting device according to claim 5, characterized in that: The reverse protection module is also provided with a protection device, and the protection device and the ultra-high voltage capacitor form a double protection for the ultrasonic excitation module; When the ultra-high voltage capacitor can effectively isolate DC, the protection device exhibits a high-impedance state; when the ultra-high voltage capacitor cannot effectively isolate DC, the protection device conducts the dangerous voltage to the ground, thereby forming secondary protection for the ultrasonic excitation module.

7. The transmitting device according to claim 1, characterized in that: The ultra-high voltage bias application module is provided with a conducting device; The ultra-high voltage output by the ultra-high voltage adjustable module passes through the conductive device and is applied to the waveform excitation signal output by the reverse protection module to form an ultrasonic excitation signal with an ultra-high voltage bias.

8. The transmitting device according to claim 2, characterized in that: The transmission mode gating module is provided with a switch device; The programmable control module outputs the selection signal to the switch device, thereby controlling the switch device to output an ultrasonic excitation signal with or without an ultra-high voltage bias.

9. The transmitting device according to claim 6, characterized in that: The protection device includes a varistor or a diode.

10. The transmitting device according to claim 7, characterized in that: The conduction device includes a low internal resistance inductor or a diode.

11. The transmitting device according to claim 8, characterized in that: The switching device includes a high-voltage relay or a high-voltage switch.

12. An ultrasonic transducer system, characterized in that: It comprises an ultrasonic transducer and the transmitting device according to any one of claims 1 to 11, wherein the transducer array of the ultrasonic transducer is a single array element or multiple array elements; and the transmitting device is connected to the ultrasonic transducer.

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