An ultrasonic transducer signal anti-interference transmission method and device

Abstract

The application relates to the technical field of ultrasonic transducers, in particular to an ultrasonic transducer signal anti-interference transmission method and device, which comprises a signal preprocessing unit, an anti-interference unit, an isolation driving unit and a receiving demodulation and decoding unit; the signal preprocessing unit receives original electric signals and differentially amplifies to generate differential signals; the anti-interference unit collects the working environment temperature in real time through a temperature monitoring module, an encoding strategy selection module and a modulation parameter control module dynamically select optimal encoding rules and adjust modulation parameters according to the working environment temperature, and a signal processing module converts the differential signals into digital signals and completes encoding modulation; the isolation driving unit isolates the signals and power amplifies; the receiving demodulation and decoding unit demodulates and decodes according to corresponding rules and restores ultrasonic signals; the application dynamically adapts the encoding rules, the modulation parameters and the heat dissipation strategy through temperature monitoring, suppresses the high-temperature performance drift of the anti-interference unit and guarantees reliable transmission of the ultrasonic transducer signals.

Description

Technical Field

[0001] This invention relates to the technical field of ultrasonic transducers, and in particular to a method and apparatus for anti-interference transmission of ultrasonic transducer signals. Background Technology

[0002] In wire bonding, ultrasonic transducers are one of the components that enable reliable bonding. By generating precise and controllable ultrasonic vibrations, combined with process parameters such as pressure and temperature, they complete the metallurgical connection between the chip and the substrate or lead frame. Their performance directly affects the bonding quality, strength, and packaging yield. To achieve stable signal transmission and anti-interference, an anti-interference unit with signal acquisition, analysis, compensation, and driving functions is typically used. Compensation algorithms ensure the anti-interference transmission of the transducer signal, thereby maintaining the stability of resonant frequency tracking and vibration control. However, this approach has significant drawbacks in practical applications:

[0003] Both the transducer and the anti-interference unit generate heat during operation. In high-temperature environments, the anti-interference unit will experience performance drift, leading to decreased signal acquisition accuracy, reduced compensation and adjustment capabilities, and decreased resonant frequency tracking accuracy. This causes the transducer output amplitude fluctuation to exceed the process allowable range, resulting in problems such as poor bonding and insufficient bonding strength, which affect the yield of semiconductor packaging and product reliability.

[0004] Therefore, there is an urgent need for an ultrasonic transducer signal anti-interference transmission device that can suppress the high-temperature performance drift of the anti-interference unit. Summary of the Invention

[0005] This invention provides a method and apparatus for anti-interference transmission of ultrasonic transducer signals, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An ultrasonic transducer signal anti-interference transmission device, comprising:

[0008] The signal preprocessing unit is used to receive the raw electrical signal from the ultrasonic transducer and perform differential amplification to generate a differential signal;

[0009] An anti-interference unit, connected to a signal preprocessing unit, includes: a temperature monitoring module that monitors the operating ambient temperature of the anti-interference unit in real time; an encoding strategy selection module that selects the corresponding optimized encoding rule based on the operating ambient temperature; a modulation parameter control module that dynamically adjusts the modulation parameters based on the operating ambient temperature; and a signal processing module that converts the differential signal into a digital signal, encodes it using the optimized encoding rule, and modulates the encoded signal using the modulation parameters.

[0010] The isolation drive unit isolates and amplifies the modulated signal.

[0011] The receiving demodulation and decoding unit demodulates and decodes the signal according to the optimized encoding rules to restore the ultrasonic signal.

[0012] Furthermore, it also includes:

[0013] An electromagnetic shielding unit is wrapped around the outside of the main vibration area of ​​the ultrasonic transducer, forming an installation cavity with the ultrasonic transducer. An anti-interference unit is set inside the installation cavity.

[0014] The heat dissipation unit includes a circulating heat dissipation channel embedded in the electromagnetic shielding unit, and a medium supply module connected to the circulating heat dissipation channel.

[0015] The adjustment module is electrically connected to the anti-interference unit and the media supply module;

[0016] The adjustment module receives the ambient temperature transmitted by the temperature monitoring module and triggers operations hierarchically according to the preset range of the ambient temperature.

[0017] Furthermore, the adjustment module triggers operations hierarchically based on the preset temperature range of the operating environment, including:

[0018] When the temperature is in the first temperature rise range, a command is sent to the encoding strategy selection module to activate the encoding rule that adds redundant check bits;

[0019] When the temperature enters the second temperature rise range, a carrier frequency adjustment command is simultaneously sent to the modulation parameter control module and the circulation flow rate of the medium supply module is increased.

[0020] When the temperature reaches the third temperature rise range, the control signal processing module starts the reduced data rate transmission mode and maximizes the heat dissipation flow rate.

[0021] The first temperature rise range is the temperature range below the first threshold, the second temperature rise range is the temperature range from the first threshold to the second threshold, and the third temperature rise range is the temperature range above the second threshold, where the second threshold is higher than the first threshold.

[0022] Furthermore, the electromagnetic shielding unit is a metal shielding shell with an insulating layer on its outer wall.

[0023] Furthermore, the circulating heat dissipation channels are evenly distributed along the inner wall of the electromagnetic shielding unit; the circulating heat dissipation channels run through both ends of the electromagnetic shielding unit, forming a closed loop with the medium supply module.

[0024] Furthermore, the mounting cavity is filled with a thermally conductive and insulating medium.

[0025] Furthermore, the medium supply module includes a cooling medium storage tank, a circulating pump, and a flow regulating valve. The outlet end of the cooling medium storage tank is connected to the inlet end of the circulating pump, the outlet end of the circulating pump is connected to the inlet end of the flow regulating valve, the outlet end of the flow regulating valve is connected to one end of the circulating heat dissipation channel, and the other end of the circulating heat dissipation channel is connected to the inlet end of the cooling medium storage tank, forming a closed loop. The flow regulating valve is electrically connected to the regulating module, and its opening is controlled by the regulating module to regulate the circulating flow rate of the cooling medium.

[0026] Furthermore, the temperature monitoring module includes several temperature sensors, which are located at different positions within the mounting cavity.

[0027] An ultrasonic transducer signal anti-interference transmission method, employing the ultrasonic transducer signal anti-interference transmission device described above, includes:

[0028] The system receives the raw electrical signal from the ultrasonic transducer and performs differential amplification to generate a differential signal.

[0029] The operating ambient temperature of the anti-interference unit is monitored in real time, and the corresponding optimized coding rule is selected according to the operating ambient temperature, and the modulation parameters are dynamically adjusted.

[0030] The differential signal is converted into a digital signal, encoded using optimized coding rules, and the encoded signal is modulated using modulation parameters.

[0031] The modulated signal is isolated and amplified, and then demodulated and decoded according to the optimized coding rules to restore the ultrasonic signal.

[0032] The technical solution of this invention can achieve the following technical effects:

[0033] The original electrical signal of the ultrasonic transducer is differentially amplified by the signal preprocessing unit. The temperature monitoring module in the anti-interference unit captures the ambient temperature in real time. The encoding strategy selection module and modulation parameter control module dynamically adapt and optimize the encoding rules and modulation parameters according to the temperature. The signal processing module completes the signal conversion, encoding, and modulation. Together with the isolation drive unit and the receiving demodulation and decoding unit, reliable signal transmission is achieved. At the same time, the electromagnetic shielding unit can isolate external electromagnetic interference. The heat dissipation unit and the adjustment module work together to trigger encoding optimization, modulation parameter adjustment, and heat dissipation intensity adjustment operations in a hierarchical manner according to the preset temperature range. The adjustment module can dynamically optimize the heat dissipation strategy based on the feedback information of the encoding and modulation parameters. Combined with the thermally conductive insulating medium in the mounting cavity, the heat dissipation and insulation effects are further improved. This can suppress the performance drift of the anti-interference unit under high temperature conditions, ensure signal acquisition accuracy, compensation adjustment capability, and resonant frequency tracking accuracy, stabilize the transducer output amplitude, avoid problems such as poor bonding and insufficient bonding strength, improve the yield of semiconductor packaging and product reliability, and achieve synergy between signal anti-interference transmission and high temperature adaptive adjustment, adapting to the actual application requirements of wire bonding process.

[0034] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the ultrasonic transducer signal anti-interference transmission device in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram showing the connection between the electromagnetic shielding unit and the heat dissipation unit in an embodiment of the present invention;

[0038] The following labels are used in the attached diagram: 1. Ultrasonic transducer; 111. Temperature sensor; 2. Electromagnetic shielding unit; 21. Mounting cavity; 22. Thermally conductive insulating medium; 3. Heat dissipation unit; 31. Circulating heat dissipation channel; 32. Medium supply module; 321. Cooling medium storage tank; 322. Circulating pump; 323. Flow regulating valve. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] like Figure 1 As shown, an ultrasonic transducer signal anti-interference transmission device of the present invention includes:

[0042] The signal preprocessing unit is used to receive the raw electrical signal from the ultrasonic transducer and perform differential amplification to generate a differential signal;

[0043] An anti-interference unit, connected to a signal preprocessing unit, includes: a temperature monitoring module that monitors the operating ambient temperature of the anti-interference unit in real time; an encoding strategy selection module that selects the corresponding optimized encoding rule based on the operating ambient temperature; a modulation parameter control module that dynamically adjusts the modulation parameters based on the operating ambient temperature; and a signal processing module that converts the differential signal into a digital signal, encodes it using the optimized encoding rule, and modulates the encoded signal using the modulation parameters.

[0044] The isolation drive unit isolates and amplifies the modulated signal.

[0045] The receiving demodulation and decoding unit demodulates and decodes the signal according to the optimized encoding rules to restore the ultrasonic signal.

[0046] In this embodiment, the ultrasonic transducer generates a raw electrical signal, which is received by the signal preprocessing unit. To suppress interference such as common-mode noise, the signal preprocessing unit differentially amplifies the raw electrical signal. By comparing the difference between the two input signals, the effective signal is amplified and common-mode noise is suppressed, thereby generating a differential signal with a high signal-to-noise ratio. For example, a differential amplifier with a high common-mode rejection ratio can be used, and its input terminal is directly connected to the signal output terminal of the ultrasonic transducer.

[0047] The anti-interference unit integrates multiple functional modules to achieve intelligent anti-interference processing of signals; its temperature monitoring module can achieve real-time temperature monitoring by installing a thermistor or integrating a temperature sensor on or near the circuit board of the anti-interference unit; the coding strategy selection module selects the corresponding optimized coding rule based on the real-time operating environment temperature information provided by the temperature monitoring module. For example, when the temperature rises, channel noise may increase. At this time, the coding strategy selection module selects a coding rule with stronger error correction capability, such as cyclic redundancy check or convolutional code, to improve the robustness of data transmission; if the temperature is low and the channel conditions are good, a coding rule with higher coding efficiency can be selected to reduce data transmission overhead.

[0048] The modulation parameter control module also dynamically adjusts the modulation parameters according to the ambient temperature to optimize the signal performance in the transmission channel. For example, when the temperature rises, causing channel attenuation or increased noise, the modulation parameter control module adjusts parameters such as carrier frequency or modulation depth to enhance the signal's resistance to attenuation or reduce the bit error rate. The carrier frequency can be adjusted by digitally controlling the oscillator, or the modulation depth can be adjusted by changing the output amplitude of the digital-to-analog converter. The signal processing module can quantize the continuous analog signal into discrete digital values ​​through the analog-to-digital converter, encode the digital signal using the optimized encoding rules selected by the encoding strategy selection module, and add redundant information to the data to improve its anti-interference capability during transmission. For example, Hamming code or Reed-Solomon code can be used for encoding. Finally, the modulation parameters provided by the modulation parameter control module are used to modulate the encoded signal, converting the digital encoded signal into an analog high-frequency signal suitable for transmission. For example, frequency shift keying, phase shift keying, or quadrature amplitude modulation can be used.

[0049] The isolation drive unit is used to isolate and amplify the modulated signal. The isolation function uses electrical isolation technologies such as optocouplers or isolation transformers to block ground loop current and common-mode noise to protect subsequent circuits and ensure signal purity. The power amplification ensures that the modulated signal has sufficient power to overcome transmission loss before it is transmitted to the receiving end. For example, a broadband power amplifier can be used to improve the driving capability.

[0050] The receiving demodulation and decoding unit is located at the end of the signal transmission link. It receives the signal transmitted through the isolation drive unit and demodulates and decodes the received signal according to the optimized coding rules adopted by the coding strategy selection module in the anti-interference unit. The demodulation process restores the high-frequency modulated signal to the baseband digital coded signal, and the decoding process recovers the original ultrasonic signal information from the coded signal. For example, if the transmitting end uses frequency shift keying modulation and Hamming code encoding, the receiving end will correspondingly use a frequency shift keying demodulator and a Hamming code decoder to restore the signal.

[0051] Through the above processing, the original ultrasonic signal can be accurately restored, thereby ensuring the stability and accuracy of the ultrasonic transducer.

[0052] As a preferred embodiment of the above, such as Figure 1 and Figure 2 As shown, an ultrasonic transducer signal anti-interference transmission device further includes an electromagnetic shielding unit 2, a heat dissipation unit 3, and an adjustment module; wherein, the electromagnetic shielding unit 2 is wrapped around the outside of the main vibration area of ​​the ultrasonic transducer 1, forming an installation cavity 21 between the electromagnetic shielding unit 2 and the ultrasonic transducer 1, and the anti-interference unit is disposed in the installation cavity 21; the heat dissipation unit 3 includes a circulating heat dissipation channel 31 embedded in the electromagnetic shielding unit 2, and a medium supply module 32 connected to the circulating heat dissipation channel 31; the adjustment module is electrically connected to the anti-interference unit and the medium supply module 32; the adjustment module receives the working environment temperature transmitted by the temperature monitoring module, and triggers operations hierarchically according to the preset range of the working environment temperature.

[0053] In this embodiment, the electromagnetic shielding unit 2 is used to protect internal electronic components from external electromagnetic interference by blocking or attenuating the propagation of electromagnetic waves, or to prevent the leakage of electromagnetic radiation generated by internal components. Its implementation may include, but is not limited to, a shell made of conductive material, or a composite material with electromagnetic shielding function. The mounting cavity 21 is enclosed by the electromagnetic shielding unit 2 and the vibration area of ​​the main body of the ultrasonic transducer 1 to form a relatively closed space, providing a controlled physical environment for the anti-interference unit, which helps to isolate external environmental interference and provide space for internal thermal management.

[0054] The heat dissipation unit 3 is used to actively or passively remove internally generated heat to maintain internal components within a suitable operating temperature range. It can be a liquid cooling system based on fluid circulation, a fan-based forced air cooling system, or a thermoelectric semiconductor cooler. The circulating heat dissipation channel 31 is the channel in the heat dissipation unit 3 that guides the flow of the cooling medium. Its design can be integrally formed inside the electromagnetic shielding unit 2, for example, by casting or machining, or it can be an additional pipe structure. The geometry and layout of the channel affect cooling efficiency; it can be serpentine, spiral, or grid-like to increase the heat exchange area. The medium supply module 32 is responsible for supplying and maintaining the flow of cooling medium to the circulating heat dissipation channel 31. For liquid cooling systems, it may include a coolant reservoir. Storage tanks, circulating pump 322, and flow control valves, etc., and for air-cooled systems, fans, air filters, etc.; the regulating module receives the working environment temperature transmitted from the temperature monitoring module and controls the corresponding actuators according to preset logic or algorithms to optimize and stabilize the device performance; this module can be implemented by a microcontroller, digital signal processor, or programmable gate array, etc.; the hierarchical triggering operation is a phased, multi-level response mechanism, that is, different operating strategies are triggered according to different preset ranges of the working environment temperature. For example, only slight adjustments are made in the lower temperature range, and stronger intervention measures are initiated in the higher temperature range, so that the device can perform fine management according to the actual situation to avoid over- or under-response.

[0055] Furthermore, the adjustment module triggers operations hierarchically based on the preset temperature range of the operating environment, specifically including:

[0056] When the temperature is in the first temperature rise range, an instruction is sent to the encoding strategy selection module to activate the encoding rule that adds redundant check bits. At this time, the media supply module 32 runs at the basic flow rate.

[0057] When the temperature enters the second temperature rise range, a carrier frequency adjustment command is simultaneously sent to the modulation parameter control module and the circulation flow rate of the medium supply module 32 is increased.

[0058] When the temperature reaches the third temperature rise range, the control signal processing module starts the reduced data rate transmission mode and maximizes the heat dissipation flow rate.

[0059] The first temperature rise range is the temperature range below the first threshold, the second temperature rise range is the temperature range from the first threshold to the second threshold, and the third temperature rise range is the temperature range above the second threshold, where the second threshold is higher than the first threshold.

[0060] In this embodiment, the first threshold and the second threshold are preset temperature critical points used to distinguish different degrees of temperature rise. By setting the thresholds, the device can accurately determine the current temperature range and trigger corresponding hierarchical response measures to ensure that the most appropriate strategy can be adopted under different temperature conditions. For example, the first threshold can be set to 80% of the upper limit of the normal operating temperature of the device, and the second threshold can be set to 95% of the upper limit of the normal operating temperature of the device. The temperature monitoring module continuously monitors the operating environment temperature of the anti-interference unit and transmits the real-time temperature data to the adjustment module. The adjustment module judges the received temperature data according to the preset first, second and third temperature rise ranges.

[0061] When the temperature is in the first temperature rise range, it means the ambient temperature is slightly rising. The adjustment module sends a command to the encoding strategy selection module to activate an encoding rule that adds redundant check bits. By adding extra check information to the original data, the anti-interference and error correction capabilities of the encoded signal are enhanced. Even if a slight increase in temperature leads to a slight increase in noise, the integrity and accuracy of data transmission can still be effectively guaranteed. When the temperature enters the second temperature rise range, it means the ambient temperature has further increased, entering a moderate temperature rise state. While activating the encoding rule that adds redundant check bits, the adjustment module sends a carrier frequency adjustment command to the modulation parameter control module. By changing the carrier frequency, it avoids specific noise bands that may appear at the current temperature or optimizes the signal transmission characteristics in the current environment. The increased circulation rate of the medium supply module 32 increases the flow rate of the cooling medium, thereby enhancing the heat dissipation efficiency of the heat dissipation unit 3 and more actively controlling the temperature rise. When the temperature reaches the third temperature rise range, it means that the working environment temperature has reached a state of severe temperature rise, and the device faces high thermal stress. The adjustment module controls the signal processing module to start the reduced data rate transmission mode, thereby reducing the data transmission rate in exchange for higher signal transmission reliability and reducing the bit error rate caused by high temperature. At the same time, it maximizes the heat dissipation flow rate so that the heat dissipation unit 3 can operate at the highest efficiency to reduce the temperature as soon as possible and protect the equipment from overheating damage. This hierarchical response mechanism enables the device to take gradual and matched intervention measures according to the degree of temperature change, avoiding the limitations of a single strategy and ensuring that the ultrasonic signal can still maintain efficient and stable transmission in complex and variable environmental temperatures.

[0062] The electromagnetic shielding unit 2 is used to enclose the vibration area of ​​the main body of the ultrasonic transducer 1 and form a mounting cavity 21. The anti-interference unit is set in the mounting cavity 21 to provide electromagnetic shielding. However, in practical applications, especially in humid, conductive environments or environments requiring high electrical safety, a simple metal shielding shell may pose a risk of electrical contact with the external environment or adjacent components, which may lead to short circuit leakage or interference with signal transmission. Therefore, as a preferred embodiment, the electromagnetic shielding unit 2 is a metal shielding shell with an insulating layer on its outer wall.

[0063] The metal shielding shell is an outer shell structure made of conductive metal material. It can use the conductivity of metal to reflect and absorb electromagnetic waves, thereby blocking external electromagnetic interference from entering the internal circuit and preventing electromagnetic radiation generated by the internal circuit from leaking out. As one implementation method, the metal shielding shell can be made of materials such as stainless steel, aluminum alloy or copper alloy, which have good conductivity and mechanical strength. As another implementation method, the metal shielding shell can be formed by processes such as stamping, casting or welding to ensure its structural integrity and shielding effect.

[0064] The insulating layer is a non-conductive material layer covering the outer surface of the metal shielding housing to provide electrical isolation and prevent accidental electrical contact between the metal housing and the external environment or adjacent components, thereby avoiding short circuits, leakage, and potential equipment failures or safety hazards. As one implementation method, the insulating layer can be formed by spraying epoxy resin, polyimide coating, or polytetrafluoroethylene film, exhibiting excellent insulation performance and environmental resistance. Alternatively, the insulating layer can be achieved through anodizing, ceramic coating, or wrapping with an insulating sleeve to provide reliable electrical isolation protection. Through this structural combination, the device not only achieves stable signal anti-interference transmission but also improves its operational reliability and safety, avoiding the introduction of new electrical risks due to the metallic characteristics of the electromagnetic shielding unit 2.

[0065] The anti-interference unit generates heat during operation. If the design of the circulating heat dissipation channel 31 in the heat dissipation unit 3 is unreasonable, it may lead to local heat accumulation, affecting heat dissipation efficiency, and thus causing the operating environment temperature of the anti-interference unit to rise, affecting its performance stability and signal transmission reliability. In this regard, as a preferred embodiment, the circulating heat dissipation channel 31 is evenly distributed along the inner wall of the electromagnetic shielding unit 2. The circulating heat dissipation channel 31 passes through both ends of the electromagnetic shielding unit 2 and forms a closed loop with the medium supply module 32.

[0066] In this embodiment, the circulating heat dissipation channel 31 is a channel that carries the cooling medium and performs heat exchange. By uniformly distributing it along the inner wall of the electromagnetic shielding unit 2, the heat dissipation area can be maximized, ensuring that heat can be uniformly and efficiently transferred from the inner wall of the electromagnetic shielding unit 2 to the cooling medium, avoiding local overheating. This distribution method can be achieved by forming multiple parallel and equally spaced annular or spiral channels on the inner wall of the electromagnetic shielding unit 2 through integral molding or welding. The circulating heat dissipation channel 31 runs through both ends of the electromagnetic shielding unit 2, which means that the channel extends from one end to the other in the axial direction of the electromagnetic shielding unit 2 to form an inlet and outlet, ensuring that the cooling medium can flow completely through the entire heat dissipation area, covering the entire length of the anti-interference unit, thereby achieving comprehensive heat removal.

[0067] The circulating heat dissipation channel 31 and the medium supply module 32 form a closed loop. The cooling medium flows continuously between the medium supply module 32 and the circulating heat dissipation channel 31 without direct contact with the external environment, realizing the reuse of the medium, ensuring the continuous supply and circulation of the cooling medium, maintaining stable heat dissipation capacity, and reducing medium loss and environmental pollution. This structural combination enables the operating temperature of the anti-interference unit to be precisely controlled within the optimal range, improving the performance stability of core components such as the signal preprocessing unit and the anti-interference unit, and ensuring the reliability of ultrasonic signal transmission.

[0068] Furthermore, the mounting cavity 21 is filled with a thermally conductive and insulating medium 22.

[0069] The thermally conductive insulating medium 22 is a material that possesses both good thermal conductivity and excellent electrical insulation properties. Its thermal conductivity ensures that the heat generated during the operation of the anti-interference unit can be effectively conducted from the heat source to the inner wall of the mounting cavity 21, and then transferred to the heat dissipation unit 3. Its electrical insulation properties ensure that short circuits or leakage will not occur in the internal circuits of the anti-interference unit during heat conduction, thereby maintaining the electrical safety and signal integrity of the device. As a specific implementation, the mounting cavity 21 can be filled with thermally conductive silicone or thermally conductive potting compound; for example, an organosilicon thermally conductive potting compound with high thermal conductivity and good dielectric properties can be selected. After the anti-interference unit is installed in the mounting cavity 21, the thermally conductive potting compound is injected into the mounting cavity 21 by vacuum potting, so that it completely covers the surface of the anti-interference unit and is in close contact with the inner wall of the mounting cavity 21. After potting, a curing process is performed to form a bubble-free, uniformly filled thermally conductive insulating layer.

[0070] Efficient heat transfer and electrical isolation between the anti-interference unit and the electromagnetic shielding unit 2 are achieved by filling the mounting cavity 21 with a thermally conductive insulating medium 22. When the anti-interference unit operates in the mounting cavity 21, its internal electronic components generate heat. This heat is first absorbed by the thermally conductive insulating medium 22. Due to its excellent thermal conductivity, the thermally conductive insulating medium 22 can quickly conduct heat from the surface of the anti-interference unit to the inner wall of the mounting cavity 21, where the inner wall of the mounting cavity 21 is in close contact with the electromagnetic shielding unit 2. The electromagnetic shielding unit 2 has a built-in circulating heat dissipation channel 31. Therefore, the heat is transferred through the thermally conductive insulating medium 22, the inner wall of the mounting cavity 21, and the wall of the electromagnetic shielding unit 2 to the cooling medium in the circulating heat dissipation channel 31. The cooling medium circulates under the drive of the medium supply module 32, carrying away the heat and thus effectively cooling the anti-interference unit in the mounting cavity 21. At the same time, the insulating properties of the thermally conductive insulating medium 22 ensure electrical isolation between the anti-interference unit circuit and the electromagnetic shielding unit 2, avoiding electrical faults that may be caused by heat conduction and ensuring the stability and safety of the ultrasonic transducer 1 signal anti-interference transmission device.

[0071] Based on the above embodiments, in order to accurately, efficiently, and stably control the circulation of the cooling medium to adapt to the heat dissipation requirements of the anti-interference unit under different operating ambient temperatures and to ensure the long-term reliability of the heat dissipation system, the medium supply module 32 includes a cooling medium storage tank 321, a circulation pump 322, and a flow regulating valve 323. The cooling medium storage tank 321 is used to store the cooling medium and provide a continuous source of coolant for the heat dissipation system. It can be made of corrosion-resistant and well-sealed materials, such as stainless steel, engineering plastics, or composite materials, to ensure the purity of the cooling medium and the long-term stability of the system. In addition, the storage tank can also integrate a liquid level sensor for monitoring the cooling medium. The system has a reserve capacity and issues an alarm or automatically replenishes the fluid when the level is too low. The circulating pump 322 is the power source that drives the flow of the cooling medium. It can extract the cooling medium from the storage tank and deliver it to the circulating heat dissipation channel 31 at a certain pressure and flow rate. It can be a centrifugal pump, gear pump, or peristaltic pump, depending on the required flow rate, head, and properties of the cooling medium. The flow regulating valve 323 is used to precisely control the flow rate of the cooling medium in the circulating heat dissipation channel 31. By adjusting the opening of the valve, the flow rate of the cooling medium flowing through the heat dissipation channel can be changed, thereby achieving fine control of the heat dissipation capacity. It can be an electric regulating valve, a pneumatic regulating valve, or a proportional control valve.

[0072] In this embodiment, the outlet end of the cooling medium storage tank 321 is connected to the inlet end of the circulating pump 322, ensuring that the circulating pump 322 can continuously draw cooling medium from the cooling medium storage tank 321, which is the starting point of the cooling medium circulation. The connection can be in the form of flexible hose, rigid pipe or integrated flow channel, and the sealing of the connection must be ensured to prevent leakage. The outlet end of the circulating pump 322 is connected to the inlet end of the flow regulating valve 323, so that the cooling medium output by the circulating pump 322 first passes through the flow regulating valve 323 for precise flow control. The connection method also needs to consider sealing and pressure resistance to adapt to the pressure of the pumped medium. The outlet end of the flow regulating valve 323 is connected to one end of the circulating heat dissipation channel 31. The cooling medium controlled by the flow regulating valve 323 is introduced into the circulating heat dissipation channel 31 to begin its heat dissipation process inside the electromagnetic shielding unit 2. The connection should ensure that the fluid enters the flow channel smoothly and reduce resistance. The other end of channel 31 is connected to the inlet of cooling medium storage tank 321, forming a closed loop. After absorbing heat through the circulating heat dissipation channel 31, the cooling medium returns to the cooling medium storage tank 321, completing one cycle. This closed loop design ensures the reuse of cooling medium and reduces consumption. In addition, the closed loop system is equipped with a filter to remove impurities and an expansion tank to cope with volume changes caused by thermal expansion and contraction of the cooling medium. The flow regulating valve 323 is electrically connected to the regulating module, which controls its opening to regulate the circulating flow rate of the cooling medium. The regulating module calculates the required cooling medium flow rate based on the ambient temperature fed back by the temperature monitoring module and controls the opening of the flow regulating valve 323 through an electrical signal. For example, the regulating module can output a 4-20mA current signal or a 0-10V voltage signal to the electric regulating valve to precisely adjust the valve opening, thereby dynamically regulating the circulating flow rate of the cooling medium to match the real-time heat dissipation requirements.

[0073] When the anti-interference unit is working, the heat it generates is transferred to the thermally conductive insulating medium 22 inside the mounting cavity 21 and further to the circulating heat dissipation channel 31 inside the electromagnetic shielding unit 2. The cooling medium stored in the cooling medium storage tank 321 is drawn out from the outlet end of the storage tank under the drive of the circulating pump 322 and enters through the inlet end of the circulating pump 322. Then, the cooling medium flows out from the outlet end of the circulating pump 322 and enters the inlet end of the flow regulating valve 323. Under the electrical control of the regulating module, the flow regulating valve 323 precisely adjusts its opening degree according to the working environment temperature monitored in real time by the temperature monitoring module, thereby controlling the flow rate of the cooling medium. The regulated cooling medium enters the circulating heat dissipation channel 31 from the outlet end of the flow regulating valve 323 and flows in the channel. The electromagnetic shielding unit 2 absorbs heat; the cooled medium, after absorbing heat, flows out from the other end of the circulating heat dissipation channel 31 and returns to the inlet of the cooled medium storage tank 321 to complete a closed loop; throughout the process, the regulating module dynamically adjusts the opening of the flow regulating valve 323 according to the temperature change of the anti-interference unit's working environment, thereby regulating the circulating flow rate of the cooled medium to ensure that the heat dissipation system can provide appropriate cooling capacity according to actual needs; this closed loop design not only ensures the continuous supply and reuse of the cooled medium, but also enables the heat dissipation capacity to match the real-time heat load of the anti-interference unit through the precise control of the flow regulating valve 323 by the regulating module, thereby effectively maintaining the anti-interference unit within the optimal operating temperature range and avoiding performance degradation or failure due to overheating.

[0074] Based on the above embodiments, the ultrasonic transducer 1 signal anti-interference transmission device monitors the working environment temperature of the anti-interference unit in real time through the temperature monitoring module, and adjusts the encoding strategy and modulation parameters and controls the heat dissipation unit 3 according to the temperature. In order to fully and accurately reflect the real thermal state of the entire working environment, the temperature monitoring module includes several temperature sensors 111, and multiple temperature sensors 111 are set in different positions in the mounting cavity 21.

[0075] The temperature monitoring module is responsible for acquiring the temperature information of the anti-interference unit's working environment in real time, providing accurate temperature data input for encoding strategy selection, modulation parameter control, and heat dissipation management. This module can be an independent hardware circuit or a temperature acquisition interface integrated into the main control chip. It converts the analog signal output by the sensor into a digital signal through an analog-to-digital converter for analysis by the processor. The temperature sensor 111 is used to sense the ambient temperature and convert the temperature information into an electrical signal. It can be a thermistor, thermocouple, resistance temperature detector, or semiconductor temperature sensor 111, etc., and is distributed in multiple representative areas inside the mounting cavity 21. For example, it can be placed near the chip with high heat generation in the anti-interference unit, at the inlet and outlet of the heat dissipation channel, and in different corners of the mounting cavity 21. This distributed arrangement can obtain more comprehensive temperature distribution information inside the mounting cavity 21, rather than just the temperature of a certain point, thereby enabling the identification of local hot spots or temperature gradients.

[0076] When the anti-interference unit is working, it generates heat inside. This heat may create an uneven temperature field within the mounting cavity 21. By strategically arranging several temperature sensors 111 in key heat-generating areas, heat dissipation paths, and locations where temperature gradients may exist within the mounting cavity 21, the temperature monitoring module can collect temperature data from multiple discrete points in real time. This multi-point temperature data is transmitted to the adjustment module, which can comprehensively analyze this multi-point data, such as calculating the average temperature, identifying the highest temperature point, or analyzing the temperature gradient. Based on more accurate and comprehensive temperature information, the adjustment module can more timely and accurately determine the actual thermal state of the anti-interference unit, thereby more effectively triggering the coding strategy selection module to adjust and optimize coding rules, the modulation parameter control module to dynamically adjust modulation parameters, and the media supply module 32 to increase the circulation flow rate, among other heat dissipation operations. This makes the temperature management of the anti-interference transmission device more refined and intelligent.

[0077] The present invention also provides a method for anti-interference transmission of ultrasonic transducer signals, applied to the above-mentioned ultrasonic transducer signal anti-interference transmission device, comprising:

[0078] The system receives the raw electrical signal from the ultrasonic transducer and performs differential amplification to generate a differential signal.

[0079] The operating ambient temperature of the anti-interference unit is monitored in real time, and the corresponding optimized coding rule is selected according to the operating ambient temperature, and the modulation parameters are dynamically adjusted.

[0080] The differential signal is converted into a digital signal, encoded using optimized coding rules, and the encoded signal is modulated using modulation parameters.

[0081] The modulated signal is isolated and amplified, and then demodulated and decoded according to the optimized coding rules to restore the ultrasonic signal.

[0082] This method receives the raw electrical signal from the ultrasonic transducer and differentially amplifies it to suppress common-mode noise and provide a high-quality differential signal. Based on real-time temperature information, it selects the corresponding optimized coding rule and dynamically adjusts the modulation parameters, enabling the signal processing strategy to adaptively match the current environmental conditions and ensure optimal anti-interference performance at different temperatures. By converting the differentially amplified analog signal into a digital signal and encoding it using the selected optimized coding rule, the error correction capability of the signal is enhanced. Simultaneously, the dynamically adjusted modulation parameters modulate the encoded signal to adapt it to the characteristics of the transmission channel. Finally, the modulated signal undergoes isolation and power amplification to ensure the integrity and effectiveness of the transmission. At the receiving end, the received signal is demodulated and decoded according to the optimized coding rule used at the transmitting end to accurately reconstruct the original ultrasonic signal. The entire process forms a closed-loop adaptive anti-interference mechanism, enabling the ultrasonic transducer signal to maintain high-fidelity transmission even in complex and changing environments.

[0083] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined herein, and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. An ultrasonic transducer signal interference rejection transmission device, characterized by, include: The signal preprocessing unit is used to receive the raw electrical signal from the ultrasonic transducer and perform differential amplification to generate a differential signal; An anti-interference unit, connected to the signal preprocessing unit, includes: a temperature monitoring module for real-time monitoring of the operating environment temperature of the anti-interference unit; an encoding strategy selection module for selecting a corresponding optimized encoding rule based on the operating environment temperature; a modulation parameter control module for dynamically adjusting the modulation parameters based on the operating environment temperature; and a signal processing module for converting the differential signal into a digital signal, encoding it using the optimized encoding rule, and modulating the encoded signal using the modulation parameters. The isolation drive unit isolates and amplifies the modulated signal. The receiving demodulation and decoding unit demodulates and decodes the signal according to the optimized encoding rules to restore the ultrasonic signal; Also includes: An electromagnetic shielding unit is wrapped around the outside of the main vibration area of ​​the ultrasonic transducer, forming a mounting cavity with the ultrasonic transducer. The anti-interference unit is disposed in the mounting cavity. The heat dissipation unit includes a circulating heat dissipation channel embedded in the electromagnetic shielding unit, and a medium supply module connected to the circulating heat dissipation channel. The adjustment module is electrically connected to the anti-interference unit and the medium supply module; The adjustment module receives the ambient temperature transmitted by the temperature monitoring module, and triggers operations hierarchically according to the preset range of the ambient temperature, including: When the temperature is in the first temperature rise range, an instruction is sent to the encoding strategy selection module to activate the encoding rule that adds redundant check bits; When the temperature enters the second temperature rise range, a carrier frequency adjustment command is simultaneously sent to the modulation parameter control module and the circulation flow rate of the medium supply module is increased. When the temperature reaches the third temperature rise range, the control signal processing module starts the reduced data rate transmission mode and maximizes the heat dissipation flow rate. The first temperature rise range is the temperature range below the first threshold, the second temperature rise range is the temperature range from the first threshold to the second threshold, and the third temperature rise range is the temperature range above the second threshold, wherein the second threshold is higher than the first threshold.

2. The ultrasonic transducer signal anti-jamming transmission apparatus of claim 1, wherein, The electromagnetic shielding unit is a metal shielding shell with an insulating layer on its outer wall.

3. The ultrasonic transducer signal anti-jamming transmission apparatus of claim 1, wherein, The circulating heat dissipation channels are evenly distributed along the inner wall of the electromagnetic shielding unit; the circulating heat dissipation channels pass through both ends of the electromagnetic shielding unit, forming a closed loop with the medium supply module.

4. The ultrasonic transducer signal anti-jamming transmission apparatus of claim 1, wherein, The mounting cavity is filled with a thermally conductive and insulating medium.

5. The ultrasonic transducer signal anti-jamming transmission apparatus of claim 1, wherein, The medium supply module includes a cooling medium storage tank, a circulating pump, and a flow regulating valve. The outlet end of the cooling medium storage tank is connected to the inlet end of the circulating pump, the outlet end of the circulating pump is connected to the inlet end of the flow regulating valve, the outlet end of the flow regulating valve is connected to one end of the circulating heat dissipation channel, and the other end of the circulating heat dissipation channel is connected to the inlet end of the cooling medium storage tank, forming a closed loop. The flow regulating valve is electrically connected to the regulating module, and its opening is controlled by the regulating module to regulate the circulating flow rate of the cooling medium.

6. The ultrasonic transducer signal anti-jamming transmission apparatus of claim 1, wherein, The temperature monitoring module includes several temperature sensors, which are disposed at different locations within the mounting cavity.

7. A method for interference-resistant transmission of ultrasonic transducer signals, using an interference-resistant transmission device for ultrasonic transducer signals according to one of claims 1 to 6, characterized in that include: The system receives the raw electrical signal from the ultrasonic transducer and performs differential amplification to generate a differential signal. The operating environment temperature of the anti-interference unit is monitored in real time, and the corresponding optimized coding rule is selected according to the operating environment temperature, and the modulation parameters are dynamically adjusted. The differential signal is converted into a digital signal, encoded using the optimized encoding rule, and the encoded signal is modulated using the modulation parameters. The modulated signal is isolated and amplified, and then demodulated and decoded according to the optimized coding rules to restore the ultrasonic signal.

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