A biocompatible diamond acoustic cavity self-adapting noise reduction auxiliary system and method

Abstract

This invention discloses a biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system, comprising a diamond acoustic cavity, an acoustic signal acquisition module, an adaptive noise reduction processing module, and a feedback control module. The diamond acoustic cavity receives and transmits acoustic signals generated by biological tissue. The acoustic signal acquisition module is coupled to the diamond acoustic cavity, acquiring the acoustic signals and converting them into electrical signals. The adaptive noise reduction processing module is connected to the acoustic signal acquisition module, performing adaptive filtering and noise reduction processing on the electrical signals, and outputting the noise-reduced target signal. The feedback control module is connected to both the adaptive noise reduction processing module and the acoustic signal acquisition module, dynamically adjusting the filtering parameters of the adaptive noise reduction processing module based on the deviation between the target signal and a preset threshold. The advantages of this invention compared to existing technologies are: it provides a biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system and method that achieves high-sensitivity acquisition and high-quality noise reduction output of bioacoustic signals.

Description

Technical Field

[0001] This invention relates to the field of acoustic signal processing technology, specifically to a biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system and method. Background Technology

[0002] In fields such as biomedical testing, ultrasound imaging, and minimally invasive diagnosis and treatment, the quality of acoustic signal acquisition directly affects diagnostic accuracy and treatment outcomes.

[0003] Because acoustic signals generated by biological tissues are typically weak in amplitude, wide in bandwidth, and susceptible to interference from environmental noise, extremely high requirements are placed on the sensitivity and signal-to-noise ratio of acoustic sensing systems.

[0004] Diamond materials possess excellent acoustic properties, including high sound velocity, high acoustic impedance, low internal loss, and good thermal stability. Furthermore, after surface biocompatibility treatment, they can meet the safety requirements for in vitro and in vivo biomedical applications.

[0005] However, existing diamond acoustic sensing technology still faces the following problems in practical applications:

[0006] The acoustic coupling efficiency between biological tissues and acoustic sensors is low;

[0007] Environmental noise and artifacts caused by the motion of biological tissues have a significant impact on signal quality.

[0008] Temperature drift causes signal baseline shift, reducing detection reliability; traditional fixed-parameter filtering algorithms are difficult to adapt to dynamically changing noise environments. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the above-mentioned technical defects and provide a biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system and method for achieving high-sensitivity acquisition and high-quality noise reduction output of bioacoustic signals.

[0010] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: a biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system, comprising a diamond acoustic cavity, an acoustic signal acquisition module, an adaptive noise reduction processing module, and a feedback control module;

[0011] The diamond acoustic cavity receives and transmits acoustic signals generated by biological tissue. The acoustic signal acquisition module is coupled to the diamond acoustic cavity to acquire acoustic signals and convert them into electrical signals.

[0012] The adaptive noise reduction processing module is connected to the acoustic signal acquisition module, performs adaptive filtering and noise reduction processing on the electrical signal, and outputs the noise-reduced target signal.

[0013] The feedback control module is connected to the adaptive noise reduction processing module and the acoustic signal acquisition module respectively, and dynamically adjusts the filtering parameters of the adaptive noise reduction processing module according to the deviation between the target signal and the preset threshold.

[0014] Preferably, the diamond acoustic cavity is a microcavity structure, and its surface is treated with biocompatibility.

[0015] Preferably, the acoustic signal acquisition module includes any one of a piezoelectric transducer and a fiber optic acoustic sensor, and the acoustic signal acquisition module is covalently coupled to the diamond acoustic cavity.

[0016] Preferably, the adaptive noise reduction processing module includes a signal decomposition unit, a noise estimation unit, and an adaptive filtering unit;

[0017] The signal decomposition unit decomposes the electrical signal into multiple frequency band components;

[0018] The noise estimation unit estimates the background noise power spectrum based on the statistical characteristics of each frequency band component;

[0019] The adaptive filtering unit performs adaptive Wiener filtering on each frequency band component according to the noise power spectrum and the adjustment instructions output by the feedback control module.

[0020] Preferably, the feedback control module calculates the filtering convergence factor based on the real-time signal-to-noise ratio of the target signal and feeds the convergence factor back to the adaptive filtering unit.

[0021] Preferably, it also includes a biological tissue contact interface and a temperature compensation module;

[0022] The biological tissue contact interface is located at the front end of the diamond acoustic cavity, forming an acoustic coupling interface with the biological tissue.

[0023] The temperature compensation module is connected to the diamond acoustic cavity and the adaptive noise reduction processing module to monitor temperature changes and compensate for signal distortion caused by temperature drift.

[0024] Another aspect of this invention discloses an adaptive noise reduction method for a biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system, comprising the following steps:

[0025] S1: Receives and transmits acoustic signals generated by biological tissues through a biocompatible diamond acoustic cavity;

[0026] S2: Acquires acoustic signals and converts them into electrical signals;

[0027] S3: Perform adaptive filtering and noise reduction on the electrical signal and output the noise-reduced target signal;

[0028] S4: Based on the deviation between the target signal and the preset threshold, dynamically adjust the adaptive filtering parameters and feed them back to step S3.

[0029] Preferably, S3 includes:

[0030] S3.1: Decompose the electrical signal into multiple frequency band components;

[0031] S3.2: Estimate the background noise power spectrum based on the statistical characteristics of each frequency band component;

[0032] S3.3: Based on the noise power spectrum and the adjustment command fed back from S4, perform adaptive Wiener filtering on each frequency band component to obtain the target signal.

[0033] Preferably, S4 includes:

[0034] S4.1: Calculate the real-time signal-to-noise ratio of the target signal;

[0035] S4.2: Generate a filtering convergence factor based on the deviation between the real-time signal-to-noise ratio and the preset threshold;

[0036] S4.3: Feedback the filter convergence factor to S3 to dynamically control the filter convergence speed.

[0037] The advantages of this invention compared to the prior art are:

[0038] This invention uses a biocompatible diamond acoustic cavity as the acoustic transmission medium. It leverages the excellent characteristics of diamond, such as high sound velocity and low sound loss, to effectively improve the receiving sensitivity and transmission efficiency of weak bioacoustic signals. Furthermore, it forms a stable acoustic coupling interface through the biological tissue contact interface at the front end, reducing interface reflection loss.

[0039] The adaptive noise reduction processing module of this invention performs adaptive Wiener filtering on each frequency band component based on frequency band decomposition and noise power spectrum estimation to achieve differentiated dynamic noise reduction. At the same time, the feedback control module monitors the signal-to-noise ratio of the target signal in real time and calculates the filtering convergence factor, dynamically adjusting the filtering parameters to quickly adapt to the time-varying characteristics of the noise environment, avoiding distortion or insufficient noise reduction caused by fixed parameter filtering. It is suitable for various bioacoustic detection scenarios in vivo and in vitro. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system.

[0041] Figure 2 This is a flowchart illustrating the adaptive noise reduction auxiliary method. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings.

[0043] Combined with appendix Figure 1-2 As shown, this invention discloses a biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system, which is mainly composed of a diamond acoustic cavity, an acoustic signal acquisition module, an adaptive noise reduction processing module, and a feedback control module. The system is also equipped with a biological tissue contact interface and a temperature compensation module. The functional modules work together in coordination, and the overall structure has a high degree of integration, excellent biocompatibility and anti-interference ability.

[0044] When using:

[0045] The diamond acoustic cavity adopts a microcavity structure and the overall surface has undergone biocompatible modification treatment, making it non-toxic, harmless, and highly compatible. The front end of the cavity is equipped with an integrated biological tissue contact interface, which can closely fit with the biological tissue to be tested, forming a stable acoustic coupling interface. It can efficiently and stably receive and transmit acoustic signals generated autonomously by biological tissue with low loss, providing a reliable foundation for subsequent signal acquisition.

[0046] The acoustic signal acquisition module can be implemented using either a piezoelectric transducer or a fiber optic acoustic sensor. This module is stably coupled to the diamond acoustic cavity through covalent bonding. The connection structure is stable and not easy to fall off. It can accurately capture the original acoustic signal transmitted by the cavity and convert it into a standardized electrical signal for transmission, ensuring that there is no significant loss or distortion in the signal transmission process.

[0047] The adaptive noise reduction processing module is interconnected with the acoustic signal acquisition module and the feedback control module, and integrates a signal decomposition unit, a noise estimation unit and an adaptive filtering unit.

[0048] During operation, the signal decomposition unit first splits the received complete electrical signal into multiple independent frequency band components. The noise estimation unit accurately calculates the background noise power spectrum based on the statistical characteristics of each frequency band component. The adaptive filtering unit combines the noise power spectrum data and the adjustment instructions issued by the feedback control module to simultaneously perform adaptive Wiener filtering on different frequency band components, filtering out mixed interference noise in layers and effectively improving the purity of the effective signal.

[0049] The feedback control module forms a closed-loop control link, which collects the target signal after noise reduction in real time, calculates the real-time signal-to-noise ratio of the target signal, compares it with the preset signal threshold to determine the operation deviation, and dynamically generates an appropriate filter convergence factor accordingly. The control parameters are fed back to the adaptive filter unit in real time to correct the filter operation logic in real time, so that the noise reduction process can dynamically adapt to complex environmental noise changes and continuously maintain a stable noise reduction effect.

[0050] The temperature compensation module is connected to both the diamond acoustic cavity and the adaptive noise reduction module. It can sense the temperature fluctuations of the working environment and the cavity itself in real time, and perform real-time compensation and correction for acoustic signal distortion caused by temperature drift. This avoids the impact of temperature changes on signal acquisition and noise reduction accuracy, and greatly improves the operational stability of the system under complex working conditions.

[0051] In specific implementation of the present invention,

[0052] Relying on the acoustic coupling between the diamond acoustic cavity and biological tissue, bioacoustic signals are stably received and transmitted; then, the acoustic signal acquisition module completes signal acquisition and electrical signal conversion; subsequently, the adaptive noise reduction processing module completes signal frequency band decomposition, background noise estimation and adaptive Wiener filtering, and outputs the noise-reduced target signal.

[0053] This invention relies on a feedback control module to monitor signal quality in real time throughout the entire process, dynamically adjusts filtering parameters and convergence speed based on signal-to-noise ratio deviation, and continuously optimizes the noise reduction strategy by combining the distortion compensation function of the temperature compensation module. This achieves full-process adaptive closed-loop noise reduction, which can shield external interference noise to the greatest extent, completely preserve effective bioacoustic signals, and significantly improve detection accuracy and applicability.

[0054] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0055] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0056] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system, characterized in that: It includes a diamond acoustic cavity, an acoustic signal acquisition module, an adaptive noise reduction processing module, and a feedback control module; The diamond acoustic cavity receives and transmits acoustic signals generated by biological tissue. The acoustic signal acquisition module is coupled to the diamond acoustic cavity to acquire acoustic signals and convert them into electrical signals. The adaptive noise reduction processing module is connected to the acoustic signal acquisition module, performs adaptive filtering and noise reduction processing on the electrical signal, and outputs the noise-reduced target signal. The feedback control module is connected to the adaptive noise reduction processing module and the acoustic signal acquisition module respectively, and dynamically adjusts the filtering parameters of the adaptive noise reduction processing module according to the deviation between the target signal and the preset threshold.

2. The biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system according to claim 1, characterized in that: The diamond acoustic cavity is a microcavity structure, and its surface is treated with biocompatibility.

3. The biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system according to claim 1, characterized in that: The acoustic signal acquisition module includes either a piezoelectric transducer or a fiber optic acoustic sensor, and the acoustic signal acquisition module is covalently coupled to the diamond acoustic cavity.

4. The biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system according to claim 1, characterized in that: The adaptive noise reduction processing module includes a signal decomposition unit, a noise estimation unit, and an adaptive filtering unit; The signal decomposition unit decomposes the electrical signal into multiple frequency band components; The noise estimation unit estimates the background noise power spectrum based on the statistical characteristics of each frequency band component; The adaptive filtering unit performs adaptive Wiener filtering on each frequency band component according to the noise power spectrum and the adjustment instructions output by the feedback control module.

5. The biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system according to claim 1, characterized in that: The feedback control module calculates the filtering convergence factor based on the real-time signal-to-noise ratio of the target signal and feeds the convergence factor back to the adaptive filtering unit.

6. The biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system according to claim 1, characterized in that: It also includes biological tissue contact interfaces and temperature compensation modules; The biological tissue contact interface is located at the front end of the diamond acoustic cavity, forming an acoustic coupling interface with the biological tissue. The temperature compensation module is connected to the diamond acoustic cavity and the adaptive noise reduction processing module to monitor temperature changes and compensate for signal distortion caused by temperature drift.

7. The adaptive noise reduction auxiliary method for a biocompatible diamond acoustic cavity adaptive noise reduction auxiliary system according to any one of claims 1-6, characterized in that: Includes the following steps: S1: Receives and transmits acoustic signals generated by biological tissues through a biocompatible diamond acoustic cavity; S2: Acquires acoustic signals and converts them into electrical signals; S3: Perform adaptive filtering and noise reduction on the electrical signal and output the noise-reduced target signal; S4: Based on the deviation between the target signal and the preset threshold, dynamically adjust the adaptive filtering parameters and feed them back to step S3.

8. The adaptive noise reduction auxiliary method according to claim 7, characterized in that: S3 includes: S3.1: Decompose the electrical signal into multiple frequency band components; S3.2: Estimate the background noise power spectrum based on the statistical characteristics of each frequency band component; S3.3: Based on the noise power spectrum and the adjustment command fed back from S4, perform adaptive Wiener filtering on each frequency band component to obtain the target signal.

9. The adaptive noise reduction auxiliary method according to claim 7, characterized in that: S4 includes: S4.1: Calculate the real-time signal-to-noise ratio of the target signal; S4.2: Generate a filtering convergence factor based on the deviation between the real-time signal-to-noise ratio and the preset threshold; S4.3: Feedback the filter convergence factor to S3 to dynamically control the filter convergence speed.

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