Vehicle-mounted modularized anti-interference voiceprint acquisition device

Abstract

The utility model belongs to the technical field of automotive electronics, and particularly relates to a vehicle-mounted modularized anti-interference voiceprint acquisition device, which comprises a metal shell, a multi-interface expansion area, a protective frame, a heat dissipation module, a voiceprint acquisition unit, a bottom mounting hole site and a main control module, the heat dissipation module comprises metal fins and a fan which are arranged at the top of the metal shell, and the multi-interface expansion area comprises a USB interface, an HDMI interface and a Type-C interface. According to the vehicle-mounted modularized anti-interference voiceprint acquisition device, modularized design is adopted, core components such as the main control board, the acquisition module and the interface board are all of plug-in type structures, and electrical and mechanical connection is achieved through the interface board and the positioning clamping groove. By means of the design, equipment maintenance and upgrading are extremely convenient, when a certain module breaks down, only the corresponding plug-in module needs to be replaced, the whole equipment does not need to be replaced, and the maintenance cost is reduced. And meanwhile, a single module can be conveniently upgraded according to technical development and actual requirements, and the overall performance of the equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile electronic technology, concretely is a kind of vehicle-mounted modular anti-interference voiceprint collection device. BACKGROUND

[0002] With the rapid development of artificial intelligence technology, voiceprint recognition is gradually applied in the field of mechanical fault monitoring and diagnosis due to its convenience.In the vehicle-mounted scene, voiceprint recognition technology is expected to realize real-time monitoring and diagnosis of vehicle mechanical faults, and more natural and smooth human-computer interaction experience.However, traditional voiceprint collection devices face many challenges in actual vehicle-mounted environment:

[0003] Poor anti-interference capability: when the vehicle is running, engine, motor and other components will generate a large amount of electromagnetic interference, and the mechanical vibration during vehicle driving is also relatively violent.These interferences will seriously affect the quality of audio signals, resulting in a significant decrease in voiceprint recognition rate.For example, when the engine is running at high load, electromagnetic interference may cause the collected audio signals to be distorted, thereby interfering with the extraction of normal sound characteristics by the voiceprint recognition system.

[0004] Low collection accuracy: relying only on single-point microphone for audio collection, it is difficult to realize spatial positioning of sound and cannot effectively suppress background noise.In complex vehicle environment, various noises are interwoven, and the sound signals collected by single-point microphone often contain a large amount of useless information, limiting the accuracy of voiceprint recognition.For example, during vehicle driving, wind noise, tire noise and other background noise will mask the weak sound signals generated by mechanical faults, affecting the accuracy of fault diagnosis.

[0005] Poor heat dissipation performance: when acoustics collection equipment is continuously running for a long time, a large amount of heat will be generated.If heat is not dissipated in time, the high temperature of the equipment will affect the performance and life of its internal electronic components, thereby reducing the stability of the equipment.For example, some traditional voiceprint collection devices have decreased performance of internal chips due to poor heat dissipation after long-term use, resulting in increased voiceprint recognition error rate.

[0006] Low integration: existing devices usually adopt fixed integrated module design, which makes it difficult to maintain and upgrade the device.Once a module fails, the entire device often needs to be replaced, increasing the cost of use and maintenance difficulty.Moreover, with the continuous development of technology, it is difficult to upgrade the device flexibly to meet new needs.

[0007] Installation is limited: the installation structure of conventional devices lacks universality and cannot adapt to the structural characteristics of different vehicle models.The layout of the interior space, the installation position of electronic devices and other differences of different vehicle models result in that a large amount of customized work is needed during installation of traditional voiceprint collection devices, reducing the applicability and promotion efficiency of the product.

[0008] In addition, in the application of current voiceprint recognition technology in the vehicle-mounted field, the related equipment still has the following typical problems in the deployment and operation process:

[0009] Data transmission and analysis are limited: usually relying on local processing and local storage, the collected data cannot be transmitted to the cloud in real time. This makes the device unable to fully utilize the powerful computing resources and data analysis capabilities of the cloud, limiting the in-depth mining and analysis of voiceprint data, and making it difficult to achieve more accurate fault diagnosis and personalized human-computer interaction services.

[0010] Deployment is inconvenient: some devices need external SIM cards, which increases the production process and cost when the devices are mass-produced. Moreover, when deploying in multiple regions around the world, the compatibility problem of external SIM cards also brings great trouble to the deployment work due to different network frequency bands and operator policies in different regions.

[0011] High maintenance cost: lack of remote monitoring and OTA (Over-The-Air) upgrade capability, the maintenance of the device needs manual on-site operation. This not only consumes a lot of manpower and time cost, but also when the device fails, it cannot be repaired and upgraded in time, affecting the normal use of the device.

[0012] In summary, the existing vehicle-mounted voiceprint collection device has many shortcomings in actual application, and there is an urgent need for a voiceprint collection device with modularity, anti-interference, flexible installation, good heat dissipation, and eSIM networking to solve these problems. Content of the utility model

[0013] The utility model aims at providing a vehicle-mounted modular anti-interference voiceprint collection device, which can be widely applied in vehicle mechanical fault audio collection, voiceprint intelligent recognition monitoring and diagnosis, human-computer interaction, networking data transmission and other scenes, and has eSIM Internet of Things communication capability, providing strong support for the intelligent development of vehicles.

[0014] To achieve the above purpose, the utility model provides the following technical scheme: a vehicle-mounted modular anti-interference voiceprint collection device, comprising a metal shell, a multi-interface expansion area, a protective frame, a heat dissipation module, a voiceprint collector, a bottom mounting hole, a main control module and an antenna.

[0015] Preferably, the voiceprint collector comprises a plurality of microphone arrays and is installed inside the metal shell through a shockproof rod.

[0016] Preferably, the heat dissipation module comprises metal fins and a fan arranged at the top of the metal shell for active heat conduction and dissipation, and the front of the metal shell is provided with heat dissipation holes.

[0017] Preferably, the multi-interface expansion area includes USB, HDMI, Type-C interface, and supports communication with the vehicle-mounted terminal.

[0018] Preferably, the metal shell is provided with standard screw holes at the bottom, which is suitable for installation in various vehicle structures.

[0019] Preferably, the metal shell further includes an eSIM communication module, which is used for data communication with a remote server through a cellular network.

[0020] Preferably, the eSIM communication module is connected with the main control module through an SPI or UART bus, and realizes automatic uploading of abnormal voiceprint data and remote upgrading of the device through a built-in algorithm.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] 1. The vehicle-mounted modular anti-interference voiceprint collection device adopts modular design, and the core components such as the main control board, the collection module and the interface board are in plug-in type structure, and electrical and mechanical connection is realized through the interface board and the positioning slot. This design makes it extremely convenient to maintain and upgrade the device, and when a certain module fails, only the corresponding plug-in module needs to be replaced, without the need to replace the entire device, thereby reducing the maintenance cost. At the same time, it is convenient to upgrade the single module according to the technical development and actual demand, and the overall performance of the device is improved.

[0023] 2. The vehicle-mounted modular anti-interference voiceprint collection device is connected with a cloud platform through a vehicle-mounted cellular network. Real-time uploading of voiceprint feature data is realized, deep analysis is carried out by using the powerful computing resources of the cloud platform, the quality of fault diagnosis and man-machine interaction service is improved. Remote device control and data delivery are supported, the user can remotely adjust the device parameters to realize intelligent management. The device has a firmware over-the-air (FOTA) function, and the model and system can be updated in time to ensure that the performance of the device is always at the forefront. Multiple devices are connected to a unified management platform to realize multi-node collaborative operation, improve the overall system efficiency and reliability, and meet the complex scene requirements of intelligent transportation and fleet management. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Fig. 2 It is a schematic diagram of the internal structure of the collection device of the utility model.

[0026] In the drawing: 1, metal shell; 2, multi-interface expansion area; 3, protection frame; 4, heat dissipation module; 5, voiceprint collector; 6, bottom mounting hole; 7, main control module; 8, antenna. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0028] Please refer to Figs. 1-2 The utility model provides a technical scheme:

[0029] A vehicle-mounted modular anti-interference voiceprint collection device, comprising a metal shell 1, a multi-interface expansion area 2, a protective frame 3, a heat dissipation module 4, a voiceprint collector 5, a bottom mounting hole 6, a main control module 7 and an antenna 8.

[0030] The metal shell 1 is made of metal anti-electromagnetic interference material and has good shielding capability. The internal key units are provided with local shielding covers, and all power supplies and signal channels are provided with filter circuits. These measures effectively shield external electromagnetic interference, filter out power supply and signal clutter, greatly reduce the influence of electromagnetic interference and mechanical vibration on audio signals during vehicle operation, significantly improve the voiceprint recognition rate, and ensure accurate collection and identification of voiceprints in complex vehicle-mounted environments, providing reliable voice data basis for mechanical fault diagnosis and man-machine interaction.

[0031] The voiceprint collector 5 comprises an array of multiple microphones and is protected by a shockproof rod and is installed on the upper part of the metal shell. Four microphones form an array, and the protective frame 3 prevents components from colliding with the microphones. The voiceprint collection module microphone array collects vibration signals using a beamforming algorithm, multiple microphones work together to realize sound space positioning, effectively suppress background noise, and accurately collect target sound. Even in a noisy vehicle environment, weak mechanical fault sound or user voice commands can be clearly captured, greatly improving the collection accuracy, providing high-quality data for subsequent voiceprint analysis and recognition, and ensuring fault diagnosis accuracy and smoothness of man-machine interaction.

[0032] The heat dissipation module 4 comprises metal fins and a fan arranged on the top of the metal shell 1 for active heat conduction and dissipation. The upper surface center and the front surface of the metal shell 1 are provided with heat dissipation holes. The heat dissipation module 4 is in thermal contact with the shell body through the main control chip, the top fin-shaped heat dissipation structure and the optional built-in fan, forming a high-efficiency heat dissipation system. It can dissipate the heat generated during equipment operation in time, avoid performance degradation and equipment failure caused by overheating, prolong the service life of the equipment, improve the stability, and ensure that the device can maintain good performance in long-time continuous working state.

[0033] The multi-interface expansion area 2 includes USB, HDMI, and Type-C interfaces, and supports communication with a vehicle-mounted terminal. The antenna 8 is optional for eSIM or WIFI.

[0034] The metal shell 1 is provided with standard screw holes at the bottom, which is suitable for installation in various vehicle structures. According to the structural characteristics of different vehicle models, the installation position can be flexibly selected, such as the roof, A-pillar, instrument table, etc., which greatly improves the applicability of the product to various vehicle models, reduces the customization work in the installation process, and facilitates large-scale popularization and application.

[0035] The metal shell 1 further includes an eSIM communication module, which is used for data communication with a remote server through a cellular network.

[0036] The eSIM communication module is connected with the main control module 7 through an SPI or UART bus, and realizes automatic uploading of abnormal voiceprint data and remote upgrading of the device through a built-in algorithm.

[0037] All core components (main control board, acquisition module, interface board) adopt a plug-in structure, which is convenient for maintenance and upgrading. The electrical and mechanical connections between the modules are realized through the interface board and the positioning card slot. The internal wiring is reasonable, reducing the interference path. Through the vehicle-mounted cellular network, the cloud platform is connected. Real-time uploading of voiceprint feature data is realized, and deep analysis is performed using the powerful computing resources of the cloud platform to improve the quality of fault diagnosis and human-computer interaction services. Remote device control and data delivery are supported, and users can remotely adjust device parameters to realize intelligent management. It has the function of firmware remote upgrade (FOTA), which can update the model and system in time to ensure that the device performance is always at the forefront. Multiple devices are connected to a unified management platform to realize multi-node collaborative operation, improve the overall system efficiency and reliability, and meet the needs of complex scenarios such as intelligent transportation and fleet management.

[0038] The eSIM module works with the main control chip, and has a built-in abnormal event triggering mechanism. When an abnormal voiceprint is detected, the data reporting mode is automatically started, and the GPS positioning information is sent to the remote server. This function can timely detect vehicle mechanical failures, monitor abnormal situations such as illegal operations, and provide real-time protection for safe operation of vehicles, improving the level of vehicle intelligence and safety.

[0039] The eSIM module is an independent unit, supporting plug-in or on-board packaging, which is convenient for users to flexibly select according to actual needs. It provides a communication state detection interface for device self-checking and remote diagnosis, and timely discovery and solution of communication faults. It can expand eUICC and different cellular modules, support different operators and frequency bands, and enhance the applicability of the device in different regions around the world, and adapt to diverse network environments.

[0040] All power supply and signal channels are provided with filter circuit, the shell adopts conductive metal material, the internal key unit is provided with local shielding cover, the microphone adopts floating structure, combined with shockproof material, resists the vehicle body vibration, the mainboard is fixed on the shock pad of the bottom shell protection frame.

[0041] The main control chip is in thermal contact with the shell, which is beneficial to heat dissipation. The shell has dustproof and waterproof level (optional IP54). An over-temperature detection module is arranged to ensure the safe operation of the device for a long time.

[0042] The device is embedded with an eSIM module, which establishes a connection with a cloud platform through a vehicle-mounted cellular network (such as LTE, 5G or NB-IoT), and realizes the following functions: real-time uploading of voiceprint feature data, remote device control and data delivery, firmware remote upgrade (FOTA), keeping the model and system updated in real time, multiple devices can access a unified management platform, and multi-node collaborative operation is realized.

[0043] The eSIM communication module and the voiceprint collection module are connected through a digital isolator circuit to prevent high-frequency interference generated by wireless communication from affecting sound collection. A shielding cover is used to locally package the communication module, and a low-pass filter circuit is added to the power supply channel to ensure the purity of independent power supply of the main control and communication module.

[0044] The eSIM module cooperates with the main control chip, and an abnormal event triggering mechanism is built-in. When the collection end detects abnormal voiceprint (such as mechanical abnormal sound, illegal wake-up voice), it automatically starts data reporting mode, and sends the GPS positioning information to the remote server.

[0045] The eSIM module is designed as an independent unit, supporting plug-in or on-board packaging, providing communication state detection interface, facilitating device self-checking and remote diagnosis, and can be expanded to support different operators and frequency bands. This design makes it very convenient to maintain and upgrade the device. When a module fails, only the corresponding plug-in module needs to be replaced, without the need to replace the entire device, reducing maintenance costs. At the same time, it is convenient to upgrade individual modules according to technical development and actual needs, and improve the overall performance of the device.

[0046] Working principle:

[0047] Voiceprint collection: The voiceprint collection module is composed of multiple microphone arrays. By utilizing the coordinated work of multiple microphones and combining beamforming algorithms, the module can achieve spatial positioning of sound and suppression of background noise. When there is a sound signal inside the vehicle, the microphone array will synchronously collect the sound. Taking mechanical fault monitoring as an example, the sound generated by the fault will be captured by the microphone, and the beamforming algorithm can analyze the time difference and intensity difference of the sound signals received by each microphone to determine the direction of the sound source while suppressing background noise from other directions, thereby improving the clarity and accuracy of the collected voiceprint and ensuring the acquisition of high-quality voiceprint data.

[0048] Signal processing and recognition: The collected voiceprint signals are first transmitted to the main control module. The main control module integrates signal processing and edge AI operation chips. The signal processing chip performs preprocessing on the collected raw audio signals, including filtering, amplification, and other operations, to remove noise and interference in the signals and improve signal quality. Subsequently, the edge AI operation chip analyzes and processes the preprocessed signals based on the built-in voiceprint recognition algorithm, compares them with the pre-established voiceprint model in real time, and realizes the voiceprint recognition function. For example, in human-computer interaction scenarios, it can quickly and accurately identify the user's voice commands and determine whether it is a legal wake-up voice.

[0049] Anti-interference mechanism: In terms of anti-interference, the device adopts multiple measures. The shell module is made of metal electromagnetic interference shielding material, forming an electromagnetic shielding space to block external electromagnetic interference from entering the interior. All power supplies and signal channels inside are equipped with filter circuits to filter out noise in the power supply and signal, ensuring the stability of the power supply and the purity of the signal. For critical units, local shielding covers are also provided to further enhance electromagnetic shielding effect. In addition, the microphone adopts a floating structure combined with shockproof materials, and the mainboard is fixed on a shockproof bracket with shockproof pads, effectively reducing the impact of vehicle body vibration on voiceprint collection and device operation, ensuring stable operation of the device in complex vehicle electromagnetic and vibration environments.

[0050] Heat dissipation management: When running for a long time, components such as the main control chip will generate heat. The heat dissipation module conducts the heat generated by the chip to the shell through the thermal contact between the main control chip and the shell. The fin-shaped heat dissipation structure on the top of the device increases the heat dissipation area, promoting the dissipation of heat to the surrounding environment. If the device temperature is too high, the built-in fan will start, accelerating air flow through forced air cooling to remove more heat. At the same time, the over-temperature detection module monitors the internal temperature of the device in real time, and when the temperature exceeds the set threshold, triggers the corresponding protection mechanism, such as adjusting the device operating frequency or increasing the fan speed, to ensure that the device always operates stably within the appropriate temperature range.

[0051] ESIM communication and data interaction: The eSIM module embedded in the device establishes a connection with the cloud platform through the vehicle cellular network (such as LTE, 5G or NB-IoT). In terms of data transmission, when the acquisition end detects abnormal voice prints (such as mechanical abnormal sound, illegal wake-up voice), the eSIM module cooperates with the master chip to automatically start the data reporting mode according to the built-in abnormal event trigger mechanism. At this time, the device will send voice print feature data, abnormal event information, etc. to the remote server combined with the GPS positioning information. In terms of remote control and management, users can remotely control the running parameters of the device through the cloud platform, and the cloud platform can also issue updated data or instructions to the device to realize remote device control and data delivery. Moreover, through the firmware over-the-air (FOTA) function, the model and system of the device can be updated in time to ensure that the performance of the device is always in the best state, and multiple devices can be connected to a unified management platform to realize multi-node collaborative operation.

[0052] It should be noted that, in this text, relational terms such as first and second are used only to distinguish one entity or action from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or actions. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A vehicle-mounted modular anti-interference voiceprint acquisition device, characterized in that: It includes a metal casing (1), a multi-interface expansion area (2), a protective frame (3), a heat dissipation module (4), a voiceprint collector (5), bottom mounting holes (6), a main control module (7), and an antenna (8).

2. The vehicle-mounted modular anti-interference voiceprint acquisition device according to claim 1, characterized in that: The voiceprint collector (5) includes multiple microphone arrays and is mounted inside the metal housing (1) via a shock-absorbing rod.

3. The vehicle-mounted modular anti-interference voiceprint acquisition device according to claim 1, characterized in that: The heat dissipation module (4) includes metal fins disposed on the top of the metal shell (1) for active heat conduction and heat dissipation. The upper surface of the metal shell (1) has heat dissipation holes.

4. The vehicle-mounted modular anti-interference voiceprint acquisition device according to claim 1, characterized in that: The multi-interface expansion area (2) includes USB, HDMI, and Type-C interfaces, supporting communication with the vehicle terminal.

5. The vehicle-mounted modular anti-interference voiceprint acquisition device according to claim 1, characterized in that: The metal casing (1) has standard screw holes at the bottom, which are suitable for installation in various vehicle interior structures.

6. The vehicle-mounted modular anti-interference voiceprint acquisition device according to claim 1, characterized in that: The metal casing (1) also includes an eSIM communication module, which is used to communicate with a remote server via a cellular network.

7. The vehicle-mounted modular anti-interference voiceprint acquisition device according to claim 6, characterized in that: The eSIM communication module is connected to the main control module (7) via SPI or UART bus, and uses a built-in algorithm to realize the automatic uploading of abnormal voiceprint data and remote device upgrade functions.

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