A vehicle-embedded recording eavesdropping detection and shielding system and a method of using the same

Abstract

The application discloses a vehicle-mounted embedded recording eavesdropping detection and shielding system and a use method thereof, relates to the technical field of vehicles, and comprises an embedded host unit, at least two fixed control units and a distributed detection and interference array. The embedded host unit is fixedly installed in a vehicle and is connected with a vehicle power supply, and is internally provided with a master control unit, a power management module and a signal processing module; the control units are embedded in front and rear interior panels of the vehicle and communicate with the master control unit through in-vehicle wiring or a vehicle-mounted bus; the detection and interference array comprises an acoustic transducer and a radio frequency antenna and is electrically connected with the embedded host unit. The master control unit can respond to any control unit starting instruction, control the array to perform full-vehicle or partition scanning on in-vehicle eavesdropping equipment, and emit ultrasonic interference waves to block sound pickup and radio frequency interference signals to block wireless transmission according to the results. The technical effects of carrying-free all-weather protection, independent operation of front and rear rows without blind area, full-dimension accurate detection and directional composite interference are achieved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an in-vehicle embedded recording eavesdropping detection and shielding system and its usage method. Background Technology

[0002] With the increasing frequency of commercial espionage and the rising risk of privacy breaches, vehicles are gradually becoming important venues for mobile business negotiations and private communications. The widespread use of eavesdropping devices such as miniature voice recorders and concealed wireless eavesdropping devices poses a serious challenge to the information security of official vehicles, business reception vehicles, and private cars.

[0003] Current in-vehicle anti-eavesdropping protection systems largely rely on portable devices, requiring users to carry, place, and store them daily. These devices are easily forgotten, leading to gaps in protection and preventing 24 / 7 coverage. Some fixed solutions only support control in the front row, leaving rear passengers unable to independently start or stop the system, creating significant blind spots and making them unsuitable for various scenarios such as business receptions. Furthermore, existing solutions often employ single detection or interference methods, making it difficult to simultaneously cover acoustic recording and wireless transmission eavesdropping devices. They also generally use omnidirectional high-power interference modes, resulting in high power consumption and potential interference with legitimate electronic devices within the vehicle, failing to achieve precise, targeted zoned protection. Summary of the Invention

[0004] This application provides an in-vehicle embedded recording eavesdropping detection and shielding system and its usage method. It can solve the problems in related technologies, such as reliance on portable anti-eavesdropping devices which are easily forgotten, support for only a single area resulting in operational blind spots, limited detection and interference methods, and high power consumption due to omnidirectional interference that can easily affect legitimate electronic devices inside the vehicle.

[0005] According to a first aspect of this application, an in-vehicle embedded recording eavesdropping detection and shielding system is provided, comprising:

[0006] An embedded host unit is fixedly installed inside the vehicle and connected to the vehicle's power system. The embedded host unit has a built-in main control unit, a power management module, and a signal processing module. At least two fixed control units are embedded in the interior panels of the front and rear seat areas of the vehicle, respectively, and each of the fixed control units is connected to the main control unit via internal vehicle wiring or vehicle bus. A distributed detection and jamming array, including acoustic transducers and radio frequency antennas distributed in different locations inside the vehicle, is electrically connected to the embedded host unit. The main control unit is configured to: respond to a start command sent by any of the fixed control units, control the distributed detection and jamming array to perform a full-vehicle or zone scan of potential hidden eavesdropping devices in the vehicle, and, based on the scan results, control the distributed detection and jamming array to selectively emit ultrasonic jamming waves for blocking microphone pickup and / or radio frequency jamming signals for blocking wireless data transmission.

[0007] Optionally, the embedded host unit is fixedly installed inside the vehicle's center armrest box, under the front seats, or inside the center console, and is connected to the vehicle's ACC power supply or constant power supply via a wiring harness. The power management module is configured to: control the system to automatically enter a sleep state after the vehicle is turned off, and control the system to automatically pre-wake up when the vehicle is unlocked.

[0008] Optionally, the fixed control unit includes physical buttons or touch buttons, as well as status indicator lights for synchronously displaying the working status of the embedded host unit; The operating states include standby, scanning, interference, and hibernation.

[0009] Optionally, the main control unit is also configured to support a region enhancement mode: When a start signal is received from the fixed control unit in the front row, the detection sensitivity of the front row area and the energy of the interference beam are enhanced. When a start signal is received from the fixed control unit in the rear row, the detection sensitivity of the rear row area and the interference beam energy are enhanced.

[0010] Optionally, the acoustic transducer in the distributed detection and jamming array includes an ultrasonic transmitting element and a receiving element; The main control unit controls the acoustic transducer to emit ultrasonic scanning pulses and analyze the nonlinear harmonic components in the reflected waves using the principle of active sonar, in order to identify the characteristics of the hidden recording device caused by the nonlinearity of its internal circuitry.

[0011] Optionally, the radio frequency antenna in the distributed detection and jamming array is a multi-antenna array; The main control unit is configured to perform three-dimensional spatial positioning of the wireless eavesdropping source by comparing the phase difference of the signals arriving at different radio frequency antennas and using an angle-of-arrival algorithm.

[0012] Optionally, the ultrasonic interference wave emitted by the distributed detection and jamming array adopts parametric array technology. By emitting difference-frequency ultrasonic waves towards the target area, the interference noise that coincides with the speech spectrum is demodulated at the target microphone using the nonlinear effect of air.

[0013] Optionally, the fixed control unit includes a front control panel and a rear control panel; The front control panel is integrated into the driver's side door armrest control area or next to the center console storage compartment; The rear control panel is integrated at the front of the rear center armrest or at the rear air conditioning vent control panel.

[0014] According to a second aspect of this application, a method for using an in-vehicle embedded recording eavesdropping detection and shielding system is provided, comprising: S1 receives a start command triggered by the user through a fixed control unit installed on the front or rear interior panel of the vehicle. S2, the embedded host unit responds to the startup command, wakes up from sleep mode, and starts the distributed probe array; S3, the distributed detection array performs acoustic and radio frequency scanning of the entire vehicle or its zones within the vehicle interior; S4, the main control unit analyzes the scan data to identify the type and location information of potential eavesdropping devices; S5, based on the identification results, selectively activate the ultrasonic jamming module to interfere with microphone pickup, and / or activate the radio frequency blocking module to block wireless data transmission; S6, the current operating status of the system is fed back through the status indicator lights on the fixed control unit; S7, receiving a stop command triggered by the user via any of the fixed control units, stopping the interference and controlling the system to enter a sleep standby state.

[0015] Optionally, the main control unit analyzes the scan data to identify the type and location information of potential eavesdropping devices, including: If multiple start commands from different fixed control units are detected simultaneously within a preset time, or a specific combination of key commands is detected, then the partition priority mode is entered. In the partition priority mode, the main control unit will focus the detection sensitivity and interference energy on the designated area where the command is issued.

[0016] This application utilizes an embedded host unit that is fixedly installed and integrated with the vehicle's power system, along with fixed control units embedded in the interior panels of the front and rear seats. Combined with a distributed detection and interference array consisting of acoustic transducers and radio frequency antennas located in different positions within the vehicle, and with the main control unit capable of responding to the start command of any fixed control unit to perform a full-vehicle or zone scan, and selectively emitting ultrasonic interference waves and / or radio frequency interference signals based on the scan results, this application solves the problems in related technologies such as reliance on portable anti-eavesdropping devices that are easily forgotten, limited to single-area control resulting in blind spots, and single detection and interference methods with high omnidirectional interference power consumption that can easily affect legitimate electronic devices within the vehicle. This achieves the technical effects of portable, all-weather protection, independent operation with no blind spots for front and rear seats, and precise detection and directional composite interference across all dimensions.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0018] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an in-vehicle embedded recording eavesdropping detection and shielding system provided in an embodiment of this application; Figure 2 This is a flowchart illustrating the usage method of an in-vehicle embedded recording eavesdropping detection and shielding system provided in an embodiment of this application. Detailed Implementation

[0020] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0021] The following description, with reference to the accompanying drawings, describes an embodiment of the vehicle-mounted embedded recording eavesdropping detection and shielding system and its usage method.

[0022] Figure 1 This is a schematic diagram of the structure of an in-vehicle embedded recording eavesdropping detection and shielding system provided in an embodiment of this application.

[0023] like Figure 1 As shown, the system includes: An embedded host unit is fixedly installed inside the vehicle and connected to the vehicle's power system. The embedded host unit has a built-in main control unit, a power management module, and a signal processing module. At least two fixed control units are embedded in the interior panels of the front and rear seat areas of the vehicle, respectively, and each of the fixed control units is connected to the main control unit via internal vehicle wiring or vehicle bus. A distributed detection and jamming array, including acoustic transducers and radio frequency antennas distributed in different locations inside the vehicle, is electrically connected to the embedded host unit. The main control unit is configured to: respond to a start command sent by any of the fixed control units, control the distributed detection and jamming array to perform a full-vehicle or zone scan of potential hidden eavesdropping devices in the vehicle, and, based on the scan results, control the distributed detection and jamming array to selectively emit ultrasonic jamming waves for blocking microphone pickup and / or radio frequency jamming signals for blocking wireless data transmission.

[0024] In this embodiment, the present application relates to an in-vehicle embedded recording eavesdropping detection and shielding system, which includes an embedded host unit, at least two fixed control units, and a distributed detection and jamming array.

[0025] The embedded host unit features a vehicle-adaptive design, permanently installed in a concealed location within the vehicle interior, such as inside the center console, below the center console, or under the front seats. The host unit connects to the vehicle's power system via a dedicated wiring harness, plugging into either the vehicle's ACC power supply or constant power supply, without occupying the cigarette lighter socket and with no exposed cables. The embedded host unit integrates a main control unit, a power management module, and a signal processing module. The power management module connects directly to the vehicle's battery, automatically controlling the host to enter a microampere-level ultra-low power standby mode when the vehicle is off, maintaining only the wake-up function for the fixed control unit to avoid draining the vehicle battery. When the vehicle is ignited or any fixed control unit is triggered, the power management module immediately supplies power to all modules of the host, quickly waking the system to operational status.

[0026] The system features at least two fixed control units, embedded in the interior trim panels of the front and rear passenger areas, respectively. The front control unit is integrated into the driver's side door armrest control area or next to the center console storage compartment, while the rear control unit is integrated into the front of the rear center armrest or the rear air conditioning vent control panel, allowing for convenient operation by passengers in different seats. Each fixed control unit establishes a communication connection with the main control unit via internal vehicle wiring or the vehicle bus, ensuring real-time and reliable command transmission.

[0027] The distributed detection and jamming array includes multiple acoustic transducers and radio frequency antennas, distributed in different locations within the vehicle and electrically connected to the embedded host unit. The acoustic transducers are embedded in the front headliner reading light area, near the rear headliner handle, and inside the seat headrests. The radio frequency antennas are embedded in the base of the interior rearview mirror and the high-mounted brake light cover on the rear window. This distributed layout achieves three-dimensional coverage of the entire vehicle space, ensuring no blind spots in the detection and jamming range.

[0028] The main control unit, as the core control hub of the system, is configured to respond to a start command sent by any fixed control unit, and issue scanning control commands to the distributed detection and jamming array to control it to perform a full-vehicle scan or a designated zone scan for potential hidden eavesdropping devices inside the vehicle. The raw data generated during the scanning process is transmitted to the signal processing module for preprocessing and analysis. Based on the scan results output by the signal processing module, the main control unit issues corresponding jamming control commands to the distributed detection and jamming array, controlling it to selectively emit ultrasonic jamming waves to block microphone pickup, or radio frequency jamming signals to block wireless data transmission. It can also simultaneously initiate the transmission of both jamming signals depending on the type of eavesdropping device detected.

[0029] Through this application, a fixed embedded host unit that is deeply integrated with the vehicle power system is adopted, along with fixed control units independently deployed in the front and rear rows and a distributed detection and interference array throughout the vehicle. The main control unit can respond to the start command of any control unit to perform a full vehicle or zone scan, and selectively emit ultrasonic interference waves and / or radio frequency interference signals according to the scan results.

[0030] Compared with related technologies, this embodiment uses an embedded host unit, which is fixedly installed inside the vehicle and connected to the vehicle's power system. The embedded host unit has a built-in main control unit, a power management module, and a signal processing module. At least two fixed control units are embedded in the interior panels of the front and rear seats of the vehicle, respectively. Each fixed control unit is communicatively connected to the main control unit through internal vehicle wiring or a vehicle bus. A distributed detection and jamming array includes acoustic transducers and radio frequency antennas distributed in different locations inside the vehicle. The distributed detection and jamming array is electrically connected to the embedded host unit. The main control unit is configured to: respond to a start command sent by any of the fixed control units, control the distributed detection and jamming array to perform a full-vehicle or zone scan of potential hidden eavesdropping devices inside the vehicle, and, based on the scan results, control the distributed detection and jamming array to selectively emit ultrasonic jamming waves to block microphone pickup and / or radio frequency jamming signals to block wireless data transmission. It can solve the problems in related technologies, such as the reliance on portable anti-eavesdropping devices that are easily forgotten, the support for single-area control that creates blind spots, and the limited detection and interference methods with high power consumption in omnidirectional interference that can easily affect legitimate electronic devices in the vehicle. It achieves the technical effects of portable all-weather protection, independent operation of the front and rear rows without blind spots, and precise detection and directional composite interference in all dimensions.

[0031] Optionally, the embedded host unit is fixedly installed inside the vehicle's center armrest box, under the front seats, or inside the center console, and is connected to the vehicle's ACC power supply or constant power supply via a wiring harness. The power management module is configured to: control the system to automatically enter a sleep state after the vehicle is turned off, and control the system to automatically pre-wake up when the vehicle is unlocked.

[0032] In this embodiment, the embedded host unit adopts a vehicle-adaptive integrated structural design, and is fixedly installed inside the vehicle's center armrest, under the front seats, or inside the center console. These installation locations are all concealed areas within the vehicle interior, without occupying passenger space. Furthermore, the host unit's casing matches the surrounding interior materials and color scheme, achieving a seamless, factory-like integration with the vehicle's interior without any obtrusiveness, while effectively preventing malicious damage or removal. The host unit connects to the vehicle's ACC power supply or constant power supply via a dedicated wiring harness, without occupying the vehicle's cigarette lighter socket. There are no exposed cables throughout the entire process, and all wiring harnesses use original factory-grade connectors, complying with automotive-grade electrical safety standards to ensure the stability and reliability of the power supply.

[0033] The power management module is integrated into the embedded host unit and establishes a direct electrical connection with the vehicle's battery. The power management module monitors the vehicle's ignition and door lock status in real time. After the vehicle is turned off, it automatically cuts off power to non-essential modules within the host unit, and the control system enters a sleep state. In sleep mode, the overall system power consumption remains at the microampere level, retaining only the monitoring functions for vehicle unlocking signals and control unit trigger signals. This prevents excessive draining of the vehicle's battery when the vehicle is stationary for extended periods, ensuring normal vehicle starting performance. When the power management module detects a vehicle unlocking signal, it immediately initiates automatic pre-wake-up of the control system, completing the initialization and self-test processes of the core modules in advance. This allows the system to enter standby mode as soon as the user enters the vehicle, achieving a zero-delay protection response.

[0034] Through this application, since the embedded host unit is embedded in a concealed location in the vehicle and connected to the vehicle's native power supply through a dedicated wiring harness, and the power management module can automatically go into sleep mode after the vehicle is turned off and automatically wake up when the vehicle is unlocked, the problems of external power supply occupying the interface, exposed cables being easily damaged, high standby power consumption easily depleting the battery, and startup delay in related technologies can be solved, thus achieving the technical effects of concealed integration, low power consumption safe standby, and fast response protection.

[0035] Optionally, the fixed control unit includes physical buttons or touch buttons, as well as status indicator lights for synchronously displaying the working status of the embedded host unit; The operating states include standby, scanning, interference, and hibernation.

[0036] In this embodiment, the human-machine interface component of the fixed control unit consists of operation buttons and status indicator lights, which can realize convenient control of the system and intuitive feedback on its working status.

[0037] The fixed control unit integrates physical or touch buttons, which can be selected to match the interior style of different vehicle models. The physical buttons are made of automotive-grade waterproof and dustproof material with a matte, non-slip surface. The button travel is set at 1.5mm, providing clear and distinct tactile feedback, supporting blind operation while driving. The touch buttons use capacitive touch technology, with a 2.5D tempered glass surface that seamlessly integrates with the surrounding interior panels. They are sensitive to touch and resistant to fingerprints and scratches. The button layout follows a minimalist design principle, retaining only core function buttons. Users can start and stop the system with a single press, eliminating the need for multi-level menus and making the operation intuitive and easy to understand. The buttons for the front control unit are tilted 15° towards the driver, while the buttons for the rear control unit are horizontally positioned in the front operating area of ​​the armrest. Both designs conform to ergonomic design, ensuring that occupants in different positions can easily operate the system with one hand.

[0038] The fixed control unit also integrates high-brightness LED status indicators to synchronously display the real-time operating status of the embedded host unit. The indicator lights on all fixed control units maintain completely consistent status, ensuring that both front and rear passengers can simultaneously perceive the system's current protection status. The status indicators employ a diffuse reflection lighting design, providing soft, non-glaring illumination with excellent visibility in both direct sunlight and low-light conditions inside the vehicle. When the system is in sleep mode, the status indicators are completely off, producing no light pollution. When the system completes pre-wake-up and enters standby mode, the status indicators glow a faint white, indicating that the system is ready. When the system performs an in-vehicle scan, the status indicators flash blue, with the flashing frequency synchronized with the scan progress. When the system activates interference protection mode, the status indicators glow a solid red, clearly indicating that the system is currently in a safe protection state.

[0039] Through this application, since the fixed control unit is equipped with physical buttons or touch buttons that conform to automotive standards, and synchronously displays the four working states of the system—sleep, standby, scanning, and interference—through status indicator lights, it can solve the problems of complex operation, unclear status feedback, and inability of front and rear passengers to obtain protection information synchronously in related technologies. This achieves the technical effect of intuitive and convenient operation, accurate and clear status feedback, and synchronous and consistent information for multiple passengers.

[0040] Optionally, the main control unit is also configured to support a region enhancement mode: When a start signal is received from the fixed control unit in the front row, the detection sensitivity of the front row area and the energy of the interference beam are enhanced. When a start signal is received from the fixed control unit in the rear row, the detection sensitivity of the rear row area and the interference beam energy are enhanced.

[0041] In this embodiment, the main control unit is also configured to support a regional enhancement mode, which automatically adapts the detection and interference parameters according to the source of the activation signal, without requiring the user to perform additional mode switching operations.

[0042] When the main control unit receives a start signal from the fixed control unit in the front row, it automatically adjusts the operating parameters of the distributed detection and jamming array, enhancing the detection sensitivity in the front row area by 20%. This focuses on covering common hiding places for eavesdropping devices, such as the front footwell, center console storage compartment, glove box, and gaps between front seats. Simultaneously, the main control unit uses beamforming technology to control the projection direction and energy distribution of the jamming beam, concentrating most of the jamming energy in the front row area while maintaining only minimal basic protection in the rear row area, avoiding unnecessary disruption to the normal activities of rear passengers.

[0043] When the main control unit receives a start signal from the fixed control unit in the rear row, it also increases the detection sensitivity of the rear row area by 20%, focusing on scanning the gaps between the rear seats, behind the headrests, the rear center armrest, and the area around the rear window. 80% of the interference beam energy will be directed to the rear row area, while the front row area will only maintain basic detection capabilities. This effectively reduces the overall power consumption of the system while ensuring the safety of the core protected areas.

[0044] Through this application, since the main control unit supports the area enhancement mode that is automatically triggered based on the source of the start signal, it can specifically improve the detection sensitivity and interference beam energy of the corresponding area. Therefore, it can solve the problems of high power consumption and unnecessary interference to non-target areas in the unified protection mode of the whole area in related technologies, and achieve the technical effects of precise protection on demand, reduced system power consumption, and reduced impact on non-protected areas inside the vehicle.

[0045] Optionally, the acoustic transducer in the distributed detection and jamming array includes an ultrasonic transmitting element and a receiving element; The main control unit controls the acoustic transducer to emit ultrasonic scanning pulses and analyze the nonlinear harmonic components in the reflected waves using the principle of active sonar, in order to identify the characteristics of the hidden recording device caused by the nonlinearity of its internal circuitry.

[0046] In this embodiment, the acoustic transducers in the distributed detection and jamming array are composed of pairs of ultrasonic transmitting array elements and ultrasonic receiving array elements. Multiple sets of acoustic transducers are distributed and buried in different locations inside the vehicle, specifically including the front ceiling reading light area, the area near the handles on both sides of the rear ceiling, and the inside of the seat headrests, forming a three-dimensional acoustic detection network covering the entire vehicle space to ensure no blind spots in the common hiding areas of eavesdropping devices.

[0047] The main control unit controls each ultrasonic transmitting element to emit coded ultrasonic scanning pulses, covering areas such as the front footwell, seat gaps, behind headrests, glove box, and rear center armrest. When ultrasonic waves encounter objects during propagation, they generate reflected waves, which are collected by the corresponding ultrasonic receiving element and transmitted to the signal processing module of the embedded host unit.

[0048] The signal processing module performs spectral analysis on the reflected wave signal, extracting the frequency components based on the principle of active sonar. Ordinary non-metallic and metallic objects only reflect the fundamental frequency sound wave with the same frequency as the incident pulse, and their spectrum only shows a single fundamental frequency peak. However, the microphone circuit and signal amplification circuit inside the active recording device have inherent nonlinear characteristics, which will produce nonlinear distortion under ultrasonic illumination. In addition to the fundamental frequency, the reflected wave will also contain multiple nonlinear harmonic peaks such as the second harmonic and the third harmonic. When the presence of a second harmonic feature with an intensity of -40dB or higher is detected in the reflected wave, the main control unit can determine that a hidden active recording device exists in the corresponding area.

[0049] By means of this application, since the acoustic transducer adopts a paired design of transmitting and receiving array elements, and uses the principle of active sonar to analyze the nonlinear harmonic components in the reflected wave to identify the circuit characteristics of the hidden recording device, the problem of the inability to effectively detect active recording devices in hidden locations inside the vehicle and the easy misjudgment of ordinary objects as eavesdropping devices in related technologies can be solved, thus achieving the technical effect of high-accuracy non-contact detection and comprehensive coverage of hidden hiding points inside the vehicle.

[0050] Optionally, the radio frequency antenna in the distributed detection and jamming array is a multi-antenna array; The main control unit is configured to perform three-dimensional spatial positioning of the wireless eavesdropping source by comparing the phase difference of the signals arriving at different radio frequency antennas and using an angle-of-arrival algorithm.

[0051] In this embodiment, the radio frequency antennas in the distributed detection and jamming array adopt a multi-antenna array structure, deployed respectively within the rearview mirror base and the high-mounted brake light cover on the rear window. Each multi-antenna array consists of multiple independent radio frequency receiving elements, with a fixed spatial spacing between the elements, forming spatial diversity reception capability. The multi-antenna array supports full-band signal reception from 100kHz to 6GHz, fully covering the operating frequency bands of common wireless eavesdropping devices such as 4G, 5G, Wi-Fi, and Bluetooth, and can capture weak wireless transmission signals within the vehicle interior in real time.

[0052] The main control unit is configured to achieve three-dimensional spatial positioning of the wireless eavesdropping transmitter using an angle-of-arrival algorithm. When the multi-antenna array detects a suspicious wireless transmission signal, each radio frequency receiving element synchronously acquires the raw data of the signal and transmits it to the signal processing module for preprocessing. The main control unit extracts the phase difference information of the same signal arriving at different array elements, and calculates the incident azimuth and elevation angles of the signal by combining the spatial coordinates of each array element with the array geometry. Then, through multi-array cross-positioning, the three-dimensional spatial coordinates of the wireless eavesdropping transmitter are calculated, with positioning accuracy reaching the centimeter level. This allows for accurate identification of the transmitter's specific hiding location inside the vehicle, such as a concealed area approximately 15cm deep inside the seat back.

[0053] By means of this application, since the radio frequency antenna adopts a multi-antenna array structure and the main control unit compares the phase difference of the signal arriving at different antennas and uses the angle of arrival algorithm to perform three-dimensional spatial positioning of the wireless eavesdropping source, the problem of not being able to accurately locate the position of the wireless eavesdropping device in the vehicle and the easy occurrence of missed detection and misjudgment in related technologies can be solved, and the technical effect of full-band signal coverage and centimeter-level accurate three-dimensional positioning can be achieved.

[0054] Optionally, the ultrasonic interference wave emitted by the distributed detection and jamming array adopts parametric array technology. By emitting difference-frequency ultrasonic waves towards the target area, the interference noise that coincides with the speech spectrum is demodulated at the target microphone using the nonlinear effect of air.

[0055] In this embodiment, the ultrasonic interference wave emitted by the distributed detection and jamming array adopts parametric array technology. This technology utilizes the nonlinear characteristics of ultrasonic waves propagating in the air to achieve directional sound emission and difference frequency demodulation, and has extremely strong directivity and energy concentration.

[0056] The main control unit controls the acoustic transducer to emit two high-frequency ultrasonic beams with similar frequencies toward the located target area, typically a difference frequency ultrasonic beam of 40kHz and 41kHz. When the two ultrasonic beams propagate in the same direction through the air, they interact due to the nonlinear effects of the air, resulting in a difference frequency phenomenon. When the ultrasonic beams reach the target microphone location, they are automatically demodulated to produce a low-frequency sound wave with a frequency difference equal to the difference between the two ultrasonic beams, i.e., a 1kHz difference frequency sound. The spectrum of this difference frequency sound highly overlaps with the core spectrum of human speech, and its sound pressure level is sufficient to cover the intensity of normal conversation.

[0057] The microphone of the recording device simultaneously picks up both the original speech and the high-intensity interference noise. These two noises are completely superimposed in the time domain, making it impossible to reconstruct a clear original speech from the mixed signal even with subsequent digital filtering and spectrum separation. Meanwhile, the interference beam generated by parametric array technology has an extremely narrow main lobe width, concentrating its energy only in the target area and preventing it from spreading to non-target areas, effectively avoiding interference with normal voice communication in other parts of the vehicle.

[0058] By employing parametric array technology, this application addresses the issues of poor directivity, easy impact on non-target areas, and easy filtering and restoration of interference noise in related technologies. This achieves precise directional interference, completely unrecoverable recording content, and no impact on normal in-vehicle communication.

[0059] Optionally, the fixed control unit includes a front control panel and a rear control panel; The front control panel is integrated into the driver's side door armrest control area or next to the center console storage compartment; The rear control panel is integrated at the front of the rear center armrest or at the rear air conditioning vent control panel.

[0060] In this embodiment, the fixed control unit specifically includes a front control panel and a rear control panel, which correspond to the operation needs of the front and rear passengers of the vehicle, respectively. It adopts an embedded integration design that is integrated with the original vehicle interior to achieve a seamless installation effect.

[0061] The front control panel is integrated into the driver's side door armrest control area or next to the center console storage compartment. The driver's side door armrest control area is a native, frequently used area for vehicle operation. The control panel integrated here is on the same operating plane as the window and door lock controls, allowing the driver to start and stop the system simply by moving their hand naturally without shifting their gaze or changing their driving posture, effectively ensuring operational safety during driving. The integrated location next to the center console storage compartment also caters to the needs of the front passenger, allowing them to independently control the system while the driver is focused on driving. The mounting surface of the front control panel is completely flush with the surrounding interior panels, and the edges feature the same chamfered treatment as the original vehicle, achieving a seamless visual connection.

[0062] The rear control panel is integrated into the front of the rear center armrest or the rear air conditioning vent control panel. The front of the rear center armrest is the most easily accessible operating position for rear passengers; with their arms naturally resting on the armrest, passengers can directly operate the buttons with their fingertips without having to get up or significantly adjust their seating position. For models without a rear center armrest or with limited armrest space, the rear control panel can be integrated into the rear air conditioning vent control panel, making full use of the existing interior space without requiring an additional installation area. All control panels use the same materials and surface treatment processes as the original interior, with perfectly matched colors and textures to ensure a unified interior style.

[0063] By means of this application, since the fixed control unit adopts a front and rear row separate design and is integrated into the original high-frequency operation area of ​​the front and rear row interior of the vehicle, it can solve the problems of unreasonable position of the anti-eavesdropping device control unit, inconvenient operation, and damage to the original vehicle interior aesthetics in related technologies, and achieve the technical effect of convenient and efficient operation, adaptability to the interior layout of various models, and maintenance of the integrity of the vehicle interior.

[0064] Figure 2 A flowchart illustrating the usage method of an in-vehicle embedded recording eavesdropping detection and shielding system provided in this application embodiment includes the following steps: S1 receives a start command triggered by the user through a fixed control unit installed on the front or rear interior panel of the vehicle.

[0065] In some embodiments, a fixed control unit installed on the front or rear interior trim panels of the vehicle receives a start command triggered by the user. The fixed control unit is divided into a front control panel and a rear control panel. The front control panel is integrated into the driver's side door armrest control area or next to the center console storage compartment, while the rear control panel is integrated into the front of the rear center armrest or the rear air conditioning vent control panel. The user can trigger the start command by pressing a physical or touch button on the control unit. The physical button is made of automotive-grade waterproof and dustproof material, has a 1.5mm travel distance, provides clear tactile feedback, and supports blind operation. The touch button uses capacitive touch technology, with a 2.5D tempered glass surface, providing sensitive touch. The start command is transmitted in real-time to the main control unit of the embedded host unit via internal vehicle wiring or the vehicle bus, with a command transmission delay of less than 10ms, ensuring real-time operation.

[0066] S2, the embedded host unit responds to the startup command, wakes up from sleep mode, and starts the distributed probe array.

[0067] In some embodiments, the embedded host unit responds to a start command, wakes up from sleep mode, and starts the distributed detection array. When the vehicle is turned off, the system is in sleep mode. At this time, the power management module cuts off power to non-essential modules within the host unit, maintaining overall system power consumption at the microampere level, retaining only the monitoring function for control unit trigger signals. When the main control unit receives a valid start command, the power management module immediately supplies power to the main control unit, signal processing module, and distributed detection array, and the system completes the self-test and initialization process of the core modules. If the system has already completed pre-wake-up when the vehicle is unlocked, it can directly enter the working state after responding to the start command, without needing additional initialization time.

[0068] S3, the distributed detection array performs acoustic and radio frequency scanning of the entire vehicle or its zones within the vehicle interior.

[0069] In some embodiments, the distributed detection array performs acoustic and radio frequency (RF) scans of the entire vehicle or specific areas within the vehicle. Acoustic scanning is performed by ultrasonic transducers distributed throughout the vehicle, which emit coded ultrasonic scanning pulses to cover common hiding places for eavesdropping devices, such as the front footwell, seat gaps, behind headrests, glove box, and rear center armrest. RF scanning is performed by a multi-antenna array, scanning the entire frequency band from 100kHz to 6GHz in real time, comprehensively covering the operating frequency bands of common wireless eavesdropping devices such as 4G, 5G, Wi-Fi, and Bluetooth. During a full-vehicle scan, all detection elements operate synchronously; during a zone scan, only the detection elements in the corresponding area are activated, reducing system power consumption.

[0070] S4, the main control unit analyzes the scan data to identify the type and location information of potential eavesdropping devices.

[0071] In some embodiments, the main control unit analyzes the scanning data to identify the type and location information of potential eavesdropping devices. The signal processing module first preprocesses the acoustic reflected wave signal and the radio frequency received signal to remove environmental noise and interference signals. For acoustic scanning data, the main control unit extracts the spectral components of the reflected wave. When a second harmonic characteristic with an intensity of -40dB or higher is detected in the reflected wave, it is determined that an active recording device exists in the corresponding area. For radio frequency scanning data, the main control unit extracts the phase difference of the same signal arriving at different radio frequency antenna elements, uses the angle of arrival algorithm to calculate the incident azimuth and elevation angles of the signal, and calculates the three-dimensional spatial coordinates of the wireless eavesdropping source through multi-array cross-positioning, achieving a positioning accuracy of centimeters.

[0072] Optionally, the main control unit analyzes the scan data to identify the type and location information of potential eavesdropping devices, including: If multiple start commands from different fixed control units are detected simultaneously within a preset time, or a specific combination of key commands is detected, then the partition priority mode is entered. In the partition priority mode, the main control unit will focus the detection sensitivity and interference energy on the designated area where the command is issued.

[0073] In this embodiment, while the main control unit analyzes the scan data to identify the type and location information of potential eavesdropping devices, it simultaneously monitors the command input status of the control unit. If multiple start commands from different fixed control units are detected simultaneously within a preset time window of 500ms, or if a specific key combination command triggered by the user is detected, the main control unit will automatically switch the system operating mode and enter the partition priority mode.

[0074] In scenarios triggered by multiple startup commands, the main control unit records the source region of each startup command and independently configures enhancement parameters for the region corresponding to each command. A specific key combination command involves pressing and holding a function button on any fixed control unit for 3 seconds. This allows the user to manually designate the area of ​​the current control unit as the priority protection zone, and the system will remember this setting until the next mode switch.

[0075] In zone-priority mode, the main control unit reallocates resources of the distributed detection and jamming arrays, concentrating detection sensitivity and jamming energy on the designated area where the command is issued. The acoustic and radio frequency detection sensitivity in the designated area is uniformly increased by 20%, prioritizing the completion of full-dimensional scanning and data analysis of that area. 80% of the jamming energy is directed to the designated area using beamforming technology, forming a high-strength protective barrier. Non-designated areas maintain only minimal basic detection capabilities and do not actively emit jamming signals. This ensures the protection of the core area while minimizing overall system power consumption and reducing the impact on normal activities in unprotected areas.

[0076] Through this application, since the main control unit supports triggering the partition priority mode simultaneously through multiple commands or specific key combinations, and can concentrate the detection sensitivity and interference energy on the designated area, it can solve the problems of inflexible customization of protection areas, high power consumption of full-area protection and easy interference with non-target areas in related technologies, and achieve the technical effects of customizing the protection range on demand, accurately allocating system resources, and saving energy and reducing noise.

[0077] S5, based on the identification results, selectively activate the ultrasonic jamming module to interfere with microphone pickup, and / or activate the radio frequency blocking module to block wireless data transmission.

[0078] In some embodiments, based on the identification results, an ultrasonic jamming module is selectively activated to interfere with microphone pickup, and / or a radio frequency blocking module is activated to block wireless data transmission. If only an active recording device is detected, the main control unit controls the acoustic transducer to activate the ultrasonic jamming module, using parametric array technology to emit 40kHz and 41kHz difference frequency ultrasonic waves towards the target area. Utilizing air nonlinearity, 1kHz interference noise is demodulated at the target microphone; this noise highly overlaps with the core spectrum of human speech. If only a wireless eavesdropping device is detected, the main control unit controls the radio frequency antenna to activate the radio frequency blocking module, emitting a digital adaptive interference signal in the corresponding frequency band to suppress the signal-to-noise ratio to above 20dB, completely cutting off the wireless communication link. If both types of eavesdropping devices are detected simultaneously, both jamming modules are activated synchronously.

[0079] S6, the current operating status of the system is fed back through the status indicator lights on the fixed control unit.

[0080] In some embodiments, the current operating status of the system is indicated by status indicator lights on the fixed control units. The status indicator lights on all fixed control units remain completely synchronized, ensuring that both front and rear passengers can be aware of the system's operational status in real time. The status indicator lights employ a diffuse reflection lighting design, providing soft, non-glaring illumination with good visibility in both direct sunlight and low-light conditions inside the vehicle. When the system performs a scanning operation, the indicator light flashes blue, with the flashing frequency synchronized with the scanning progress; when the system activates interference protection, the indicator light remains solid red; when the system is in standby mode, the indicator light remains solid with a faint white glow.

[0081] S7, receiving a stop command triggered by the user via any of the fixed control units, stopping the interference and controlling the system to enter a sleep standby state.

[0082] In some embodiments, the system receives a stop command triggered by the user via any fixed control unit, stops interference, and controls the system to enter a sleep standby state. The user can trigger the stop command by pressing the stop button on any fixed control unit once. After the command is transmitted to the main control unit, the system first shuts down the ultrasonic interference module and the radio frequency blocking module, and then stops the scanning operation of the distributed detection array. The power management module then cuts off unnecessary power to the main control unit, signal processing module, and detection interference array, retaining only the monitoring function for the vehicle unlock signal and control unit trigger signal. The system enters a microampere-level ultra-low power sleep standby state, awaiting the next wake-up command.

[0083] This application, by adopting a step-by-step system control process, forms a complete closed-loop control logic from instruction reception, system wake-up, multi-dimensional scanning, accurate identification, directional interference, status feedback to hibernation standby. Therefore, it can solve the problems of cumbersome operation process, untimely response, and unclear control logic of anti-eavesdropping systems in related technologies, and achieve the technical effect of simple and efficient process, fast and accurate response, and fully automated closed-loop control.

[0084] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0085] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to these embodiments, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A vehicle-mounted embedded recording eavesdropping detection and shielding system, characterized in that, include: An embedded host unit is fixedly installed inside the vehicle and connected to the vehicle's power system. The embedded host unit has a built-in main control unit, a power management module, and a signal processing module. At least two fixed control units are embedded in the interior panels of the front and rear seat areas of the vehicle, respectively, and each of the fixed control units is connected to the main control unit via internal vehicle wiring or vehicle bus. A distributed detection and jamming array, including acoustic transducers and radio frequency antennas distributed in different locations inside the vehicle, is electrically connected to the embedded host unit. The main control unit is configured to: respond to a start command sent by any of the fixed control units, control the distributed detection and jamming array to perform a full-vehicle or zone scan of potential hidden eavesdropping devices in the vehicle, and, based on the scan results, control the distributed detection and jamming array to selectively emit ultrasonic jamming waves for blocking microphone pickup and / or radio frequency jamming signals for blocking wireless data transmission.

2. The vehicle-mounted embedded recording eavesdropping detection and shielding system according to claim 1, characterized in that, The embedded host unit is fixedly installed inside the vehicle's center armrest box, under the front seats, or inside the center console, and is connected to the vehicle's ACC power supply or constant power supply via a wiring harness. The power management module is configured to: control the system to automatically enter a sleep state after the vehicle is turned off, and control the system to automatically pre-wake up when the vehicle is unlocked.

3. The vehicle-mounted embedded recording eavesdropping detection and shielding system according to claim 1, characterized in that, The fixed control unit includes physical buttons or touch buttons, as well as status indicator lights for synchronously displaying the working status of the embedded host unit. The operating states include standby, scanning, interference, and hibernation.

4. The vehicle-mounted embedded recording eavesdropping detection and shielding system according to claim 1, characterized in that, The main control unit is also configured to support a region enhancement mode: When a start signal is received from the fixed control unit in the front row, the detection sensitivity of the front row area and the energy of the interference beam are enhanced. When a start signal is received from the fixed control unit in the rear row, the detection sensitivity of the rear row area and the interference beam energy are enhanced.

5. The vehicle-mounted embedded recording eavesdropping detection and shielding system according to claim 1, characterized in that, The acoustic transducer in the distributed detection and jamming array includes ultrasonic transmitting elements and receiving elements. The main control unit controls the acoustic transducer to emit ultrasonic scanning pulses and analyze the nonlinear harmonic components in the reflected waves using the principle of active sonar, in order to identify the characteristics of the hidden recording device caused by the nonlinearity of its internal circuitry.

6. The vehicle-mounted embedded recording eavesdropping detection and shielding system according to claim 1, characterized in that, The radio frequency antenna in the distributed detection and jamming array is a multi-antenna array; The main control unit is configured to perform three-dimensional spatial positioning of the wireless eavesdropping source by comparing the phase difference of the signals arriving at different radio frequency antennas and using an angle-of-arrival algorithm.

7. The vehicle-mounted embedded recording eavesdropping detection and shielding system according to claim 1, characterized in that, The ultrasonic interference wave emitted by the distributed detection and jamming array adopts parametric array technology. By emitting difference frequency ultrasonic waves towards the target area, the nonlinear effect of air is used to demodulate the interference noise that coincides with the speech spectrum at the target microphone.

8. The vehicle-mounted embedded recording eavesdropping detection and shielding system according to claim 1, characterized in that, The fixed control unit includes a front control panel and a rear control panel; The front control panel is integrated into the driver's side door armrest control area or next to the center console storage compartment; The rear control panel is integrated at the front of the rear center armrest or at the rear air conditioning vent control panel.

9. A method for using a vehicle-mounted embedded recording eavesdropping detection and shielding system, characterized in that, The method is applied to the vehicle-mounted embedded recording eavesdropping detection and shielding system according to any one of claims 1-8, comprising: S1 receives a start command triggered by the user through a fixed control unit installed on the front or rear interior panel of the vehicle. S2, the embedded host unit responds to the startup command, wakes up from sleep mode, and starts the distributed probe array; S3, the distributed detection array performs acoustic and radio frequency scanning of the entire vehicle or its zones within the vehicle interior; S4, the main control unit analyzes the scan data to identify the type and location information of potential eavesdropping devices; S5, based on the identification results, selectively activate the ultrasonic jamming module to interfere with microphone pickup, and / or activate the radio frequency blocking module to block wireless data transmission; S6, the current operating status of the system is fed back through the status indicator lights on the fixed control unit; S7, receiving a stop command triggered by the user via any of the fixed control units, stopping the interference and controlling the system to enter a sleep standby state.

10. The method of using the vehicle-mounted embedded recording eavesdropping detection and shielding system according to claim 9, characterized in that, The main control unit analyzes the scan data to identify the type and location information of potential eavesdropping devices, including: If multiple start commands from different fixed control units are detected simultaneously within a preset time, or a specific combination of key commands is detected, then the partition priority mode is entered. In the partition priority mode, the main control unit will focus the detection sensitivity and interference energy on the designated area where the command is issued.

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