An ultrasonic parameter self-adaptive adjusting device and method based on multi-parameter monitoring

Abstract

The application provides an ultrasonic parameter self-adaptive adjustment device based on multi-parameter monitoring, comprising a parameter acquisition module, a data processing module, a parameter adjustment module and an ultrasonic generation module; the parameter acquisition module synchronously acquires the contaminated soil pressure signal and the vibration speed signal of the ultrasonic action area, and transmits the acquired signals to the data processing module; the data processing module receives the signals transmitted by the parameter acquisition module and performs filtering, amplification and analog-digital conversion processing, obtains real-time contaminated soil pressure values and real-time vibration speed values, compares the real-time values with corresponding safety threshold values, if any real-time value exceeds the corresponding threshold value, sends an adjustment instruction to the parameter adjustment module, and triggers a safety warning; the parameter adjustment module is built-in with a PID safety control algorithm; the ultrasonic generation module generates corresponding ultrasonic signals according to the parameters output by the parameter adjustment module and acts on the target object; comprising an ultrasonic signal generator and a special ultrasonic transducer for strata, the transducer is fixed through a support and closely contacts with the strata, generates ultrasonic waves after receiving the signal of the parameter adjustment module and acts on the strata, and realizes sonoluminescence.

Description

Technical Field

[0001] This application belongs to the field of soil and groundwater environmental remediation technology, specifically relating to an ultrasonic parameter adaptive adjustment device and method for multi-parameter monitoring of soil contaminated by chlorinated hydrocarbon organic pollutants. Background Technology

[0002] In industrial activities such as petroleum and chemical processing, persistent organic pollutants such as chlorinated hydrocarbons and polycyclic aromatic hydrocarbons seep into the ground, causing long-term pollution of deep soil and groundwater. These pollutants are highly toxic and difficult to decompose naturally. Traditional remediation methods, such as excavation and chemical injection, face problems such as high costs, limited effectiveness, and the potential for secondary pollution in deep underground environments.

[0003] Chlorinated hydrocarbons (such as tetrachloroethylene (PCE) and trichloroethylene (TCE)) are common high-density, recalcitrant organic pollutants found in industrial sites. Due to their chemical stability, strong hydrophobicity, and ease of migration and diffusion in underground environments, they pose a serious threat to the ecological environment and human health.

[0004] Currently, in-situ remediation technologies for chlorinated hydrocarbon-contaminated soil mainly include chemical oxidation, bioremediation, and physical methods. Chemical oxidation requires the injection of large amounts of chemical oxidants into the ground, which can easily lead to short-circuiting and bypassing in highly heterogeneous strata, creating treatment dead zones. Furthermore, it is incomplete in oxidizing high-chlorinated hydrocarbons and may produce more toxic intermediate products (such as vinyl chloride). Bioremediation has a long cycle and is highly dependent on environmental conditions (such as temperature, pH, and nutrients), often making startup difficult for high-concentration pollution or anaerobic environments. Physical methods (such as thermal desorption) are extremely energy-intensive, economically inefficient, and unsuitable for large-scale, deep-seated pollution remediation.

[0005] Sonoluminescence is a physical phenomenon that converts sound energy into light energy. This process involves extreme high temperature, high pressure, and ultraviolet radiation, and can generate hydroxyl radicals in situ, providing a new pathway for pollutant degradation. However, applying sonoluminescence to complex and porous soil media faces significant challenges: the heterogeneity and anisotropy of the soil lead to complex sound wave propagation paths, severe energy attenuation, and wavefront distortion, making it difficult to form a stable and controllable high-intensity sound field in the target area to effectively excite sonoluminescence. Summary of the Invention

[0006] In view of this, this application addresses the lack of a systematic solution in the existing technology that can effectively overcome the complexity of the strata and achieve precise adaptive and stable maintenance of the sound field.

[0007] Specifically, an ultrasonic parameter adaptive adjustment device based on multi-parameter monitoring is provided, including: a parameter acquisition module, a data processing module, a parameter adjustment module, and an ultrasonic generation module; the parameter acquisition module: the parameter acquisition module synchronously acquires the contaminated soil pressure signal and vibration velocity signal in the ultrasonic action area, and transmits the acquired signals to the data processing module; The parameter acquisition module includes a contaminated soil pressure sensor and a vibration velocity sensor; Data processing module: It has built-in safety thresholds for soil pressure and vibration velocity corresponding to the strata (the soil monitoring data collected in this application corresponds to the soil below the groundwater level. This part of the soil contains saturated water, and the content of pollutants in it is relatively stable and easy to test accurately). It receives the signal transmitted by the parameter acquisition module and performs filtering, amplification and analog-to-digital conversion processing to obtain the real-time soil pressure value and real-time vibration velocity value. It compares the real-time value with the corresponding safety threshold. If any real-time value exceeds the corresponding threshold, it sends an adjustment command to the parameter adjustment module and triggers a safety warning. Parameter adjustment module: The microcontroller output interface is connected to the conversion chip to convert the digital adjustment signal into an analog signal, which is then used by the power drive circuit to control the power transistor of the ultrasonic generator module; it has a built-in PID safety control algorithm with proportional coefficient Kp, integral coefficient Ki, and derivative coefficient Kd, and the adjustment priority is set as: ultrasonic power > pulse frequency > duty cycle; Ultrasonic generation module: Generates corresponding ultrasonic signals based on the parameters output by the parameter adjustment module and applies them to the target object; includes an ultrasonic signal generator and a formation-specific ultrasonic transducer. The transducer is fixed by a bracket and in close contact with the formation. After receiving the signal from the parameter adjustment module, it generates ultrasonic waves that act on the formation to achieve sonoluminescence.

[0008] Furthermore, the contaminated soil pressure sensor adopts a silicon piezoresistive sensor with a range of 0-100 kPa, an accuracy of ±0.1% of full scale, and a response time of less than 1 millisecond. The pressure-sensing surface of the sensor's detection end is connected to the external contaminated soil through sintered permeable metal stone. After being encapsulated as a whole, it is embedded 1.5m deep inside the silty clay layer on the side wall of the foundation pit through drilling to ensure the capture of subtle changes in the pressure of the contaminated soil. The ground vibration velocity sensor is a triaxial MEMS accelerometer with a range of ±10g and a frequency response range of 0-1000 Hz. It is anchored to the ground surface around the foundation pit by expansion bolts, with a distance of ≤3m from the ultrasonic action area. It can simultaneously collect vibration data in three directions to ensure comprehensive capture of the real vibration response.

[0009] Furthermore, the data processing module includes a signal calling unit and a core processing unit. The signal calling unit uses an operational amplifier to form a second-order low-pass filter circuit and a non-inverting amplifier circuit to filter out high-frequency noise and interference signals in the acquired signal, amplify the weak signal output by the sensor, and amplify the weak signal to the range that the core processing unit can recognize. The core processing unit uses a microcontroller with a built-in 12-bit AD conversion module and a sampling rate of 1MHz. It receives analog-to-digital conversion processing signals through an interface, has built-in Flash memory to store safety thresholds and control strategies, and is connected to a red warning light and a buzzer as safety warning components. On the other hand, this application provides a method for adaptive adjustment of ultrasound parameters under multi-parameter monitoring, which includes the following steps: S1: Parameter initialization: The safe range of contaminated soil pressure and vibration velocity range of the stratum are determined by test, and the contaminated soil pressure threshold P0 (MPa) and vibration velocity threshold V0 (mm / s) are preset; the initial ultrasonic power P1, initial pulse frequency F1kHz, and initial duty cycle D1=40% are preset according to the requirements of acoustic luminescence; the above parameters are written into the Flash memory of the data processing module through the host computer. S2: Signal Acquisition: Start the ultrasonic generator module, and the parameter acquisition module simultaneously acquires the pressure signal and vibration velocity signal of the contaminated soil in the ultrasonic action area, and transmits the signal to the data processing module; S3: Data Processing: The signal calling unit of the data processing module filters the received contaminated soil pressure signal and vibration velocity signal, filtering out noise signals with a frequency higher than 100Hz, and then amplifies the signal to the range of 0-3.3V through the amplification circuit; subsequently, the microcontroller's AD conversion module converts the amplified analog signal into a digital signal with a conversion accuracy of 12 bits, obtaining the real-time contaminated soil pressure value P and the real-time vibration velocity value V. S4: Threshold judgment: The data processing module compares the real-time contaminated soil pressure value P with the threshold P0, and at the same time compares the real-time vibration velocity value V with the threshold V0. If P≤P0 and V≤V0, then return to step S2 to continue collecting signals; if P>P0 or V>V0, then execute step S5. S5: Parameter Adjustment and Safety Control: The data processing module sends an adjustment command to the parameter adjustment module and activates an audible and visual warning. The parameter adjustment module calculates the adjustment amount according to the PID safety control algorithm, combined with the deviation between P and P0 ΔP=P-P0 and the deviation between V and V0 ΔV=V-V0, following the priority of "first reduce power, then adjust frequency duty cycle". The parameters of the ultrasonic generator module are adjusted to P1-ΔP1, F1-ΔF1, and D1-ΔD1. If the real-time value still exceeds the safety threshold within 10 seconds after adjustment, the ultrasonic generator module is controlled to reduce power by 50%. If it continues to exceed the limit, operation is suspended. S6: Loop Feedback: 10 seconds after parameter adjustment, once the parameter adjustment is complete, return to step S2 to continue acquiring signals, thereby achieving dynamic adaptive adjustment of ultrasound parameters.

[0010] Furthermore, the calibration method for safety thresholds P0 and V0 is as follows: through indoor similar simulation tests, the change curves of contaminated soil pressure and vibration velocity under different ultrasonic parameters are measured. Combined with mechanical indicators such as shear strength and permeability coefficient of the stratum, the maximum contaminated soil pressure value and vibration velocity value that do not cause instability are determined as safety thresholds. Before field application, the rationality of the thresholds needs to be verified through small-scale trial construction.

[0011] Furthermore, the parameter adjustment module calculates the adjustment amount according to the PID algorithm, first determining the contaminated soil pressure deviation e. p (t) = P - P0, vibration velocity deviation e v (t) = V - V0; Based on the adjustment priority, priority is given to e. p (t) Calculate the power adjustment ΔP1 using the PID formula: ΔP1 = K p1 ×e p (t) + K i1 ×∫0 t e p (τ)dτ + K_d1×de p (t) / dt based on e v (t) Calculate the frequency adjustment ΔF1 using the PID formula: ΔF1 = K p2 ×e v (t) + K i2 ×∫0 t e v (τ)dτ + K_d2×de v (t) / dt is finally combined with e p (t) and e v (t) Calculate the duty cycle adjustment ΔD1: ΔD1 = α × [K p3 ×e p (t) + K i3 ×∫0 t e p [(τ)dτ]+ (1-α)×[K] p4 ×e v (t) + K i4 ×∫0 t e v In the formula, K p1 -K p4 K represents the proportionality coefficient for each parameter. i1 -K i4K_d1-K_d2 are the integral coefficients of each parameter, K_d1-K_d2 are the differential coefficients of each parameter, and α is the weighting coefficient (0 < α < 1). The adjusted ultrasound parameters are: P1-ΔP1, F1-ΔF1, D1-ΔD1. After the parameters are updated, continuous monitoring is performed. If the real-time value still exceeds the safety threshold within the set time after adjustment, the power is reduced according to the preset ratio. If it continues to exceed the standard, operation is suspended.

[0012] Further, in step S6, there is a cyclic feedback: 5 seconds after parameter adjustment, the sampled values ​​are P 2MPa and V 2 mm / s, which are still slightly above the limit. The device then fine-tunes the power to W 2W and the frequency to f 1 kHz. After 10 seconds, the sampled values ​​are P 3MPa and V 3mm / s, which have returned to within the safe threshold, and the warning is lifted. Subsequently, if the formation state changes due to ultrasonic processing and P exceeds 4MPa, the device quickly adjusts the parameters to the safe range, realizing dynamic adaptive adjustment of ultrasonic parameters.

[0013] Compared with existing technologies, this application provides an ultrasonic parameter adaptive adjustment device and its usage method based on multi-parameter monitoring, which effectively overcomes the technical problems of soil heterogeneity and unstable, uncontrollable high-intensity sound fields that have not been addressed in general sonoluminescence remediation of soil media pollutants. It can effectively cope with complex strata and achieve a systematic solution for soil pollution remediation that provides precise, adaptive, and stable sound field maintenance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0016] Figure 1 This is a schematic diagram of an ultrasonic parameter adaptive adjustment device based on multi-parameter monitoring according to this application. Detailed Implementation

[0017] The embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] See appendix Figure 1 This application proposes an adaptive adjustment device for ultrasound parameters based on multi-parameter monitoring, comprising: a parameter acquisition module, a data processing module, a parameter adjustment module, and an ultrasound generation module; Parameter acquisition module: The parameter acquisition module synchronously acquires the pressure signal and vibration velocity signal of the contaminated soil in the ultrasonic treatment area, and transmits the acquired signals to the data processing module; The parameter acquisition module includes a contaminated soil pressure sensor and a vibration velocity sensor. The contaminated soil pressure sensor is a silicon piezoresistive sensor with a range of 0-100 kPa, an accuracy of ±0.1% of full scale, and a response time of less than 1 millisecond. The pressure-sensing surface of the sensor's detection end is connected to the contaminated soil through sintered permeable metal stone. After being encapsulated as a whole, it is embedded 1.5m deep inside the silty clay layer on the side wall of the foundation pit through drilling to ensure the capture of subtle changes in the pressure of the contaminated soil. The ground vibration velocity sensor is a triaxial MEMS accelerometer with a range of ±10g and a frequency response range of 0-1000 Hz. It is anchored to the ground surface around the foundation pit by expansion bolts, with a distance of ≤3m from the ultrasonic action area. It can simultaneously collect vibration data in three directions to ensure comprehensive capture of the real vibration response. Data processing module: It has built-in safety thresholds for contaminated soil pressure and vibration velocity corresponding to the stability of the strata. It receives the signal transmitted by the parameter acquisition module and performs filtering, amplification and analog-to-digital conversion processing to obtain the real-time contaminated soil pressure value and the real-time vibration velocity value. It compares the real-time value with the corresponding safety threshold. If any real-time value exceeds the corresponding threshold, it sends an adjustment command to the parameter adjustment module and triggers a safety warning. The data processing module includes a signal calling unit and a core processing unit. The signal calling unit uses an operational amplifier to form a second-order low-pass filter circuit and a non-inverting amplifier circuit to filter out high-frequency noise and interference signals in the acquired signal, amplify the weak signal output by the sensor, and amplify the weak signal to the range that the core processing unit can recognize. The core processing unit uses a microcontroller with a built-in 12-bit AD conversion module and a sampling rate of 1MHz. It receives analog-to-digital conversion signals (real-time contaminated soil pressure value and real-time vibration velocity value) through an interface, has built-in Flash memory to store safety thresholds and control strategies, and is connected to a red warning light and a buzzer as safety early warning components. Parameter adjustment module: The microcontroller output interface is connected to the conversion chip to convert the digital adjustment signal into an analog signal, which is then used by the power drive circuit to control the power transistor of the ultrasonic generator module; it has a built-in PID safety control algorithm with proportional coefficient Kp, integral coefficient Ki, and derivative coefficient Kd, and the adjustment priority is set as: ultrasonic power > pulse frequency > duty cycle; It is used to receive adjustment instructions from the data processing module. According to the preset adjustment strategy with the core of maintaining formation stability, it precisely adjusts the ultrasonic power, pulse frequency and duty cycle of the ultrasonic generator module. If the real-time value still exceeds the standard after parameter adjustment, it controls the ultrasonic generator module to reduce power or stop operation. Ultrasonic generation module: Generates corresponding ultrasonic signals based on the parameters output by the parameter adjustment module and applies them to the target object; includes an ultrasonic signal generator and a formation-specific ultrasonic transducer. The transducer is fixed by a bracket and in close contact with the formation. After receiving the signal from the parameter adjustment module, it generates ultrasonic waves that act on the formation to achieve sonoluminescence.

[0019] On the other hand, this application proposes a method for adaptive adjustment of ultrasound parameters under multi-parameter monitoring, which includes the following steps: S1: Parameter initialization: The safe range of contaminated soil pressure and vibration velocity range of the stratum are determined by test, and the contaminated soil pressure threshold P0 (MPa) and vibration velocity threshold V0 (mm / s) are preset; the initial ultrasonic power P1, initial pulse frequency F1kHz, and initial duty cycle D1=40% are preset according to the acoustic luminescence requirements; the above parameters are written into the Flash memory of the data processing module through the host computer.

[0020] The calibration method for safety thresholds P0 and V0 is as follows: Through indoor similar simulation tests, the change curves of contaminated soil pressure and vibration velocity under different ultrasonic parameters are measured. Combined with mechanical indicators such as shear strength and permeability coefficient of the stratum, the maximum contaminated soil pressure value and vibration velocity value that will not cause instability are determined as safety thresholds. Before field application, the rationality of the thresholds needs to be verified through small-scale trial construction.

[0021] S2: Signal Acquisition: Start the ultrasonic generator module, and the parameter acquisition module simultaneously acquires the pressure signal and vibration velocity signal of the contaminated soil in the ultrasonic action area, and transmits the signal to the data processing module; S3: Data Processing: The signal calling unit of the data processing module filters the received contaminated soil pressure signal and vibration velocity signal, filtering out noise signals with frequencies higher than 100Hz (such as vibration interference from construction machinery), and then amplifies the signal to the range of 0-3.3V through an amplification circuit (adapting to the AD input range of the microcontroller); subsequently, the AD conversion module of the microcontroller converts the amplified analog signal into a digital signal with a conversion accuracy of 12 bits, obtaining the real-time contaminated soil pressure value P and the real-time vibration velocity value V. For example, in a certain sampling, P=1.3MPa and V=5.2mm / s.

[0022] S4: Threshold judgment: The data processing module compares the real-time contaminated soil pressure value P with the threshold P0, and at the same time compares the real-time vibration velocity value V with the threshold V0. If P≤P0 and V≤V0, then return to step S2 to continue collecting signals; if P>P0 or V>V0, then execute step S5. S5: Parameter Adjustment and Safety Control: The data processing module sends an adjustment command to the parameter adjustment module and activates an audible and visual warning. The parameter adjustment module calculates the adjustment amount according to the PID safety control algorithm, combined with the deviation between P and P0 ΔP=P-P0 and the deviation between V and V0 ΔV=V-V0, following the priority of "first reduce power, then adjust frequency duty cycle". The parameters of the ultrasonic generator module are adjusted to P1-ΔP1, F1-ΔF1, and D1-ΔD1. If the real-time value still exceeds the safety threshold within 10 seconds after adjustment, the ultrasonic generator module is controlled to reduce power by 50%. If it continues to exceed the limit, operation is suspended. More specifically, the parameter adjustment module calculates the adjustment amount according to the PID algorithm, first determining the contaminated soil pressure deviation e. p (t) = P - P0, vibration velocity deviation e v (t) = V - V0; Based on the adjustment priority, priority is given to e. p (t) Calculate the power adjustment ΔP1 using the PID formula: ΔP1 = K p1 ×e p (t) + K i1 ×∫0 t e p (τ)dτ + K_d1×de p (t) / dt based on e v (t) Calculate the frequency adjustment ΔF1 using the PID formula: ΔF1 = K p2 ×e v (t) + K i2 ×∫0 t e v (τ)dτ + K_d2×de v (t) / dt is finally combined with e p (t) and e v(t) Calculate the duty cycle adjustment ΔD1: ΔD1 = α × [K p3 ×e p (t) + K i3 ×∫0 t e p [(τ)dτ]+ (1-α)×[K] p4 ×e v (t) + K i4 ×∫0 t e v In the formula, K p1 -K p4 K represents the proportionality coefficient for each parameter. i1 -K i4 K_d1-K_d2 are the integral coefficients of each parameter, K_d1-K_d2 are the differential coefficients of each parameter, and α is the weighting coefficient (0 < α < 1). The adjusted ultrasound parameters are: P1-ΔP1, F1-ΔF1, D1-ΔD1. After the parameters are updated, continuous monitoring is performed. If the real-time value still exceeds the safety threshold within the set time after adjustment, the power is reduced according to the preset ratio. If it continues to exceed the standard, operation is suspended.

[0023] S6: Loop Feedback: 10 seconds after parameter adjustment, once the parameter adjustment is complete, return to step S2 to continue acquiring signals, thereby achieving dynamic adaptive adjustment of ultrasound parameters.

[0024] For example, 5 seconds after parameter adjustment, the sampled values ​​are P 2MPa and V 2 mm / s, which are still slightly above the limit. The device then fine-tunes the power to W2W and the frequency to f 1 kHz. After 10 seconds, the sampled values ​​are P 3MPa and V 3mm / s, which have returned to within the safe threshold, and the warning is lifted. Subsequently, if the formation state changes due to ultrasonic processing and P exceeds 4MPa, the device quickly adjusts the parameters to the safe range, realizing dynamic adaptive adjustment of ultrasonic parameters.

[0025] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention. All should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An adaptive adjustment device for ultrasonic parameters based on multi-parameter monitoring, comprising: The system includes a parameter acquisition module, a data processing module, a parameter adjustment module, and an ultrasonic generation module. The parameter acquisition module synchronously acquires the pressure and vibration velocity signals of the contaminated soil in the ultrasonic field and transmits the acquired signals to the data processing module. The parameter acquisition module includes a contaminated soil pressure sensor and a vibration velocity sensor; Data processing module: It has built-in safety thresholds for contaminated soil pressure and vibration velocity corresponding to the stability of the strata. It receives the signal transmitted by the parameter acquisition module and performs filtering, amplification and analog-to-digital conversion processing to obtain the real-time contaminated soil pressure value and the real-time vibration velocity value. It compares the real-time value with the corresponding safety threshold. If any real-time value exceeds the corresponding threshold, it sends an adjustment command to the parameter adjustment module and triggers a safety warning. Parameter adjustment module: The microcontroller output interface is connected to the conversion chip to convert the digital adjustment signal into an analog signal, which is then used by the power drive circuit to control the power transistor of the ultrasonic generator module; it has a built-in PID safety control algorithm with proportional coefficient Kp, integral coefficient Ki, and derivative coefficient Kd, and the adjustment priority is set as: ultrasonic power > pulse frequency > duty cycle; Ultrasonic generation module: Generates corresponding ultrasonic signals based on the parameters output by the parameter adjustment module and applies them to the target object; includes an ultrasonic signal generator and a formation-specific ultrasonic transducer. The transducer is fixed by a bracket and in close contact with the formation. After receiving the signal from the parameter adjustment module, it generates ultrasonic waves that act on the formation to achieve sonoluminescence.

2. The ultrasonic parameter adaptive adjustment device based on multi-parameter monitoring according to claim 1, characterized in that: The contaminated soil pressure sensor uses a silicon piezoresistive sensor with a range of 0-100 kPa, an accuracy of ±0.1% of full scale, and a response time of less than 1 millisecond. The pressure-sensing surface of the sensor's detection end is connected to the external contaminated soil through sintered permeable metal stone. After being encapsulated as a whole, it is embedded 1.5m deep inside the silty clay layer on the side wall of the foundation pit through drilling to ensure the capture of subtle changes in the pressure of the contaminated soil. The ground vibration velocity sensor is a triaxial MEMS accelerometer with a range of ±10g and a frequency response range of 0-1000 Hz. It is anchored to the ground surface around the foundation pit by expansion bolts, with a distance of ≤3m from the ultrasonic action area. It can simultaneously collect vibration data in three directions to ensure comprehensive capture of the real vibration response.

3. The ultrasonic parameter adaptive adjustment device based on multi-parameter monitoring according to claim 1, characterized in that: The data processing module includes a signal calling unit and a core processing unit. The signal calling unit uses an operational amplifier to form a second-order low-pass filter circuit and a non-inverting amplifier circuit to filter out high-frequency noise and interference signals in the acquired signal, amplify the weak signal output by the sensor, and amplify the weak signal to the range that the core processing unit can recognize. The core processing unit uses a microcontroller with a built-in 12-bit AD conversion module and a sampling rate of 1MHz. It receives analog-to-digital conversion processing signals through an interface, has built-in Flash memory to store safety thresholds and control strategies, and is connected to a red warning light and a buzzer as safety warning components.

4. A method for adaptive adjustment of ultrasound parameters under multi-parameter monitoring according to any one of claims 1-3, comprising the following steps: S1: Parameter initialization: The safe range of contaminated soil pressure and vibration velocity range of the stratum are determined by test, and the contaminated soil pressure threshold P0 (MPa) and vibration velocity threshold V0 (mm / s) are preset; the initial ultrasonic power P1, initial pulse frequency F1kHz, and initial duty cycle D1=40% are preset according to the requirements of acoustic luminescence; the above parameters are written into the Flash memory of the data processing module through the host computer. S2: Signal Acquisition: Start the ultrasonic generator module, and the parameter acquisition module simultaneously acquires the pressure signal and vibration velocity signal of the contaminated soil in the ultrasonic action area, and transmits the signal to the data processing module; S3: Data Processing: The signal calling unit of the data processing module filters the received contaminated soil pressure signal and vibration velocity signal, filtering out noise signals with a frequency higher than 100Hz, and then amplifies the signal to the range of 0-3.3V through the amplification circuit; subsequently, the microcontroller's AD conversion module converts the amplified analog signal into a digital signal with a conversion accuracy of 12 bits, obtaining the real-time contaminated soil pressure value P and the real-time vibration velocity value V. S4: Threshold judgment: The data processing module compares the real-time contaminated soil pressure value P with the threshold P0, and at the same time compares the real-time vibration velocity value V with the threshold V0. If P≤P0 and V≤V0, then return to step S2 to continue collecting signals; if P>P0 or V>V0, then execute step S5. S5: Parameter Adjustment and Safety Control: The data processing module sends an adjustment command to the parameter adjustment module and activates an audible and visual warning. The parameter adjustment module calculates the adjustment amount according to the PID safety control algorithm, combined with the deviation between P and P0 ΔP=P-P0 and the deviation between V and V0 ΔV=V-V0, following the priority of "first reduce power, then adjust frequency duty cycle". The parameters of the ultrasonic generator module are adjusted to P1-ΔP1, F1-ΔF1, and D1-ΔD1. If the real-time value still exceeds the safety threshold within 10 seconds after adjustment, the ultrasonic generator module is controlled to reduce power by 50%. If it continues to exceed the limit, operation is suspended. S6: Loop Feedback: 10 seconds after parameter adjustment, once the parameter adjustment is complete, return to step S2 to continue acquiring signals, thereby achieving dynamic adaptive adjustment of ultrasound parameters.

5. The method for adaptive adjustment of ultrasound parameters under multi-parameter monitoring according to claim 4, characterized in that: The calibration method for safety thresholds P0 and V0 is as follows: Through indoor similar simulation tests, the change curves of contaminated soil pressure and vibration velocity under different ultrasonic parameters are measured. Combined with mechanical indicators such as shear strength and permeability coefficient of the stratum, the maximum contaminated soil pressure value and vibration velocity value that will not cause instability are determined as safety thresholds. Before field application, the rationality of the thresholds needs to be verified through small-scale trial construction.

6. The method for adaptive adjustment of ultrasound parameters under multi-parameter monitoring according to claim 4, characterized in that: The parameter adjustment module calculates the adjustment amount according to the PID algorithm, first determining the pressure deviation e of the contaminated soil. p (t) = P - P0, vibration velocity deviation e v (t) = V - V0; Based on the adjustment priority, priority is given to e. p (t) Calculate the power adjustment ΔP1 using the PID formula: ΔP1 = K p1 ×e p (t) + K i1 ×∫0 t e p (τ)dτ + K_d1×de p (t) / dt based on e v (t) Calculate the frequency adjustment ΔF1 using the PID formula: ΔF1 = K p2 ×e v (t) + K i2 ×∫0 t e v (τ)dτ + K_d2×de v (t) / dt is finally combined with e p (t) and e v (t) Calculate the duty cycle adjustment ΔD1: ΔD1 = α×[K p3 ×e p (t) + K i3 ×∫0 t e p [(τ)dτ] + (1-α)×[K] p4 ×e v (t)+ K i4 ×∫0 t e v In the formula, K p1 -K p4 K represents the proportionality coefficient for each parameter. i1 -K i4 K_d1-K_d2 are the integral coefficients of each parameter, K_d1-K_d2 are the differential coefficients of each parameter, and α is the weighting coefficient (0 < α < 1). The adjusted ultrasound parameters are: P1-ΔP1, F1-ΔF1, D1-ΔD1. After the parameters are updated, continuous monitoring is performed. If the real-time value still exceeds the safety threshold within the set time after adjustment, the power is reduced according to the preset ratio. If it continues to exceed the standard, operation is suspended.

7. The method for adaptive adjustment of ultrasound parameters under multi-parameter monitoring according to claim 4, characterized in that: In step S6, the feedback loop works as follows: 5 seconds after parameter adjustment, the sampled values ​​are P 2MPa and V 2 mm / s, which are still slightly above the limit. The device then fine-tunes the power to W 2W and the frequency to f 1 kHz. After 10 seconds, the sampled values ​​are P 3MPa and V 3mm / s, which have returned to within the safe threshold, and the warning is lifted. Subsequently, if the formation state changes due to ultrasonic processing and P exceeds 4MPa, the device quickly adjusts the parameters to the safe range, realizing the dynamic adaptive adjustment of ultrasonic parameters.

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