CN113055800A - Intelligent acoustic node data acquisition system - Google Patents
Intelligent acoustic node data acquisition system Download PDFInfo
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- CN113055800A CN113055800A CN202110286242.1A CN202110286242A CN113055800A CN 113055800 A CN113055800 A CN 113055800A CN 202110286242 A CN202110286242 A CN 202110286242A CN 113055800 A CN113055800 A CN 113055800A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/04—Microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/003—Mems transducers or their use
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- Acoustics & Sound (AREA)
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- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses an intelligent acoustic node data acquisition system, which relates to the field of acoustic node data acquisition equipment and comprises a main control module, a front-end audio acquisition module, a power supply module, an external data transmission module and a wireless communication module. The invention provides an intelligent acoustic node data acquisition system, which adopts a small micro-MEMS microphone array, has the characteristics of miniaturization and low power consumption, meets the requirement of long-time hidden work, integrates the functions of data acquisition, data transmission and storage and data transmission, adopts a high-performance core processor as a main control module, can finish the acquisition and temporary storage of acoustic signal data, and is convenient for the acoustic node to perform subsequent data processing and wireless communication. The intelligent acoustic node data acquisition system can acquire acoustic signals in an environment in real time and temporarily store the acoustic signals to a high-capacity storage card, provides a serial communication function and a wireless communication function, improves integration and functionality of acoustic nodes, and reduces power consumption of the acoustic nodes.
Description
Technical Field
The invention relates to the field of acoustic node data acquisition equipment, in particular to an intelligent acoustic node data acquisition system.
Background
With the increasing importance and complexity of security work, the demand for acoustic detection monitoring is increasing day by day. The traditional acoustic detection nodes only have acoustic signal acquisition capacity, the requirement on network communication is high when an acoustic detection sensing network is formed, an electret condenser microphone is usually adopted in a data acquisition system of a conventional acoustic detection device, the size is large, the miniaturization is difficult, and the urgent requirements of large-range forward deployment blind-compensation and long-time omnibearing approaching detection can be met by the omnidirectional micro-array acoustic monitoring nodes.
An intelligent acoustic measurement node is expected to have long-time hidden working capacity, can acquire sound data from the environment, estimates the direction, motion, characteristics, energy, type and other parameter information of a target signal according to the sound signal data, and can send the parameter information to a composite monitoring node in an acoustic measurement sensing network.
Disclosure of Invention
The invention aims to provide an intelligent acoustic node data acquisition system to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an intelligent acoustic node data acquisition system comprises a main control module, a front-end audio acquisition module, a power supply module, an external data transmission module and a wireless communication module;
the main control module controls the front-end audio acquisition module to perform analog-to-digital conversion on the acquired acoustic signals, receives real-time acquired data transmitted by the front-end audio acquisition module, controls the external transmission circuit module to realize transmission and storage of the acquired data, and communicates with the wireless communication module;
the front-end audio acquisition module receives the control instruction transmitted by the main control module and performs data acquisition work of the acoustic signal according to the instruction;
the external data transmission module receives the control instruction transmitted by the main control module, and exchanges and transmits data with the main control module according to the instruction, so that the storage of the acquired data is completed;
the wireless communication module is used for realizing the data receiving and sending of the data acquisition system in a wireless communication mode;
the power supply module supplies power to the main control module, the front-end audio acquisition module, the external data transmission module and the wireless communication module.
Furthermore, the front-end audio acquisition module comprises a microphone array, a signal conditioning circuit and an A/D conversion circuit; the front-end audio acquisition module can acquire acoustic signals through the microphone array under set sampling frequency and sampling digit, converts the acoustic signals into array digital signals through the signal conditioning circuit and the A/D conversion circuit, and finally transmits the acquired array digital signal data to the main control module.
Furthermore, the external data transmission module can enable the main control module to exchange data with a PC (personal computer), so that serial port communication is realized, the main control module can transmit data with an external memory card, and acquired data are stored in the external memory card.
Further, the wireless communication module can enable the data acquisition system to select the data to be transmitted to transmit in a wireless communication mode through instructions.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an intelligent acoustic node data acquisition system, which adopts a small micro-MEMS microphone array, has the characteristics of miniaturization and low power consumption, meets the requirement of long-time hidden work, integrates the functions of data acquisition, data transmission and storage and data transmission, adopts a high-performance core processor as a main control module, can finish the acquisition and temporary storage of acoustic signal data, and is convenient for the acoustic node to perform subsequent data processing and wireless communication. The intelligent acoustic node data acquisition system can acquire acoustic signals in an environment in real time and temporarily store the acoustic signals to a high-capacity storage card, provides a serial port communication function and a wireless communication function, improves integration and functionality of acoustic nodes, reduces power consumption of the acoustic nodes, and has important economic significance.
Drawings
Fig. 1 is an overall schematic view of the present invention.
Fig. 2 is a schematic structural diagram of a front-end audio acquisition module according to the present invention.
Fig. 3 is a schematic structural diagram of a main control module according to the present invention.
Fig. 4 is a schematic structural diagram of an external data transmission module according to the present invention.
Fig. 5 is a schematic structural diagram of a power module according to the present invention.
Fig. 6 is a schematic structural diagram of a wireless communication module according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, an intelligent acoustic node data acquisition system includes a main control module, a front-end audio acquisition module, a power module, an external data transmission module, and a wireless communication module.
The front-end audio acquisition module of the intelligent acoustic node data acquisition system is shown in fig. 2, and is provided with sampling parameters such as sampling frequency, sampling digit, audio data transmission format and the like, the microphone array adopts an 8-channel rectangular planar array, the array structure is a double-layer structure and is divided into a lower-layer 4-element rectangular planar array and an upper-layer 4-element rectangular planar array, and a surface-mounted and packaged omnidirectional MEMS microphone SPA1687LR5H-1 is adopted as a microphone. The signal conditioning circuit adopts a filter capacitor and a low-power-consumption THS4524 differential amplifier, and can filter and amplify acoustic signals collected by each array element. The conditioned acoustic signals are sent to a multichannel synchronous analog-to-digital conversion circuit to obtain array digital signals, an ADS1278 is adopted by an analog-to-digital conversion chip, VCOM end output of the ADS1278 is buffered by an operational amplifier OPA350 and then is connected to a COM end of a THS4524 to provide reference voltage of differential input signals.
As shown in fig. 3, the main control module of the intelligent acoustic measurement node data acquisition system receives sampling data transmitted by the front-end audio acquisition module, and completes data transmission with external equipment, and the main control chip adopts a 32-bit high-performance floating-point DSP chip TMS320C6713B, so that the intelligent acoustic measurement node data acquisition system has high operation speed and strong operation capability, and supports the acoustic measurement node to perform signal processing on the sampling data through a compiling processing algorithm. The main control chip TMS320C6713B adopts an McASP interface to receive sampling data transmitted by an ADC chip of a front-end audio acquisition module, is externally connected with a FLASH chip M29W800DT70N6E through an EMIF interface to store a system boot program, is used as a high-speed large-capacity buffer memory with an SDRAM chip MT48LC8M16A2P-6AIT, adopts an asynchronous serial port expansion chip WK2168 to realize data expansion of a 4-channel UART serial bus through the EMIF interface, and is respectively connected with an electronic compass positioning module, a wireless communication module and an external data transmission module through a substring port of the WK 2168. The reset circuit provides external reset when the main control chip is halted. The LED circuit is used for displaying the working state of the system.
As shown in fig. 4, an external data transmission module of the intelligent acoustic measurement node data acquisition system is provided, and a level conversion chip SP3223EEY is connected to a UART interface of a main control module after asynchronous serial port expansion to implement a serial port communication function with a PC, so that acoustic signal data or an intermediate variable received by the main control module can be uploaded to the PC to check a system program operation state, and control information can be sent to the main control chip by using the PC to implement manual software control. The high-speed file management control chip CH378Q is connected with the main control module in an 8-bit parallel mode, can be inserted into an SD card to serve as an external large-capacity memory, and receives and stores real-time sampling data transmitted by the main control module or parameter data processed by a sound detection node processing algorithm signal.
The front-end audio acquisition module, the main control module and the external data transmission module are combined with manual work, hardware and software in various modes to acquire acoustic signal data automatically, so that the intelligent acoustic node data acquisition system can adapt to the requirements of different conditions, the flexibility of the system is improved, and the data acquired by the system in real time can be temporarily stored. By adopting the omnidirectional MEMS microphone array as the microphone array, the characteristics of small size and low power consumption of the system are ensured, and the integrated integration of the micro-system is convenient to realize.
The power module of the intelligent acoustic node data acquisition system is shown in fig. 5, and the power module supplies power to each module of the system through voltage conversion. The DC/DC power supply voltage reduction adjustable chip MP1584EN is used for converting access voltage into 5V and 3.3V, a high-precision voltage reference source REF5025AIDR is used for outputting 2.5V voltage to serve as the reference voltage of an A/D conversion chip ADS1278 of a front-end audio acquisition module, a two-way voltage stabilizer TPS70345PWP is used for simultaneously outputting 3.3V and 1.2V stable voltage to be used by a main control module, and a 5V-to-1.8V LDO power supply chip forward low voltage drop voltage stabilizer AMS1117 and a 5V-to-2.85V LDO power supply chip forward low voltage drop voltage stabilizer AMS1117 are used for supplying power to the front-end audio acquisition module. The power module adopts the access mode of external power supply input and built-in storage battery, and supplies power through voltage conversion, makes data acquisition system have more wholeness, also makes the power supply mode more nimble various, satisfies different work scene demands.
As shown in figure 6, the wireless communication module of the intelligent acoustic node data acquisition system adopts an LoRa wireless communication module ATK-LORA-01, is compatible with the advantages of low operation power consumption and long data information transmission distance through an LoRa spread spectrum technology, is connected with a UART interface of a main control module after asynchronous serial port expansion, and realizes wireless communication through configuring an instruction of the LoRa module by an upper computer. The acoustic measurement node can also send the parameter data after signal processing through the wireless communication module, so that the data volume of network communication is remarkably reduced, and the energy utilization efficiency is improved.
According to the intelligent acoustic node data acquisition system, all modules are integrally packaged under the condition that communication is not influenced, various parameters can be flexibly configured according to a working scene, the core control module is universal and programmable, convenience is brought to subsequent signal processing, and the flexibility of the intelligent acoustic node data acquisition system is improved.
The word "comprising" or "comprises", as used herein, does not exclude the presence of any other elements.
The intelligent acoustic node data acquisition system can acquire acoustic signals in space in real time and store acoustic signal data in an external large-capacity memory card, can transmit data with a PC (personal computer) to facilitate equipment debugging, has a wireless communication function, can realize data transmission, and completes data uploading networking.
In the above description, by way of illustration, the application in the intelligent acoustic node is described, but the intelligent acoustic node is not limited to the acoustic node, and may also be used for data acquisition of other acoustic devices. The intelligent acoustic measurement node has signal processing capacity and can send processing data to the composite monitoring node in the acoustic measurement network.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. An intelligent acoustic node data acquisition system is characterized by comprising a main control module, a front-end audio acquisition module, a power supply module, an external data transmission module and a wireless communication module;
the main control module controls the front-end audio acquisition module to perform analog-to-digital conversion on the acquired acoustic signals, receives real-time acquired data transmitted by the front-end audio acquisition module, controls the external transmission circuit module to realize transmission and storage of the acquired data, and communicates with the wireless communication module;
the front-end audio acquisition module receives the control instruction transmitted by the main control module and performs data acquisition work of the acoustic signal according to the instruction;
the external data transmission module receives the control instruction transmitted by the main control module, and exchanges and transmits data with the main control module according to the instruction, so that the storage of the acquired data is completed;
the wireless communication module is used for realizing the data receiving and sending of the data acquisition system in a wireless communication mode;
the power supply module supplies power to the main control module, the front-end audio acquisition module, the external data transmission module and the wireless communication module.
2. The intelligent acoustic node data acquisition system of claim 1, wherein the front-end audio acquisition module comprises a microphone array, a signal conditioning circuit and an a/D conversion circuit; the front-end audio acquisition module can acquire acoustic signals through the microphone array under set sampling frequency and sampling digit, converts the acoustic signals into array digital signals through the signal conditioning circuit and the A/D conversion circuit, and finally transmits the acquired array digital signal data to the main control module.
3. The system according to claim 1, wherein the external data transmission module enables the main control module to exchange data with a PC, thereby achieving serial communication, and enables the main control module to transmit data with an external memory card, and store the acquired data in the external memory card.
4. The intelligent acoustic node data acquisition system of claim 1, wherein the wireless communication module is capable of instructing the data acquisition system to select data to be transmitted for wireless communication.
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| CN202110286242.1A CN113055800A (en) | 2021-03-17 | 2021-03-17 | Intelligent acoustic node data acquisition system |
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| CN202110286242.1A CN113055800A (en) | 2021-03-17 | 2021-03-17 | Intelligent acoustic node data acquisition system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116369928A (en) * | 2023-03-23 | 2023-07-04 | 河南翔宇医疗设备股份有限公司 | Circuit structure for digital acquisition of electromyographic signal active electrode |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030137762A1 (en) * | 2001-12-03 | 2003-07-24 | Priester William B. | Data acquisition system |
| CN203799645U (en) * | 2014-05-05 | 2014-08-27 | 辽宁工业大学 | Microphone-array-based multichannel voice processing apparatus |
| CN107103911A (en) * | 2017-04-11 | 2017-08-29 | 浙江大学 | Voice signals enhancement system based on rectangular microphone array |
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2021
- 2021-03-17 CN CN202110286242.1A patent/CN113055800A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030137762A1 (en) * | 2001-12-03 | 2003-07-24 | Priester William B. | Data acquisition system |
| CN203799645U (en) * | 2014-05-05 | 2014-08-27 | 辽宁工业大学 | Microphone-array-based multichannel voice processing apparatus |
| CN107103911A (en) * | 2017-04-11 | 2017-08-29 | 浙江大学 | Voice signals enhancement system based on rectangular microphone array |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116369928A (en) * | 2023-03-23 | 2023-07-04 | 河南翔宇医疗设备股份有限公司 | Circuit structure for digital acquisition of electromyographic signal active electrode |
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