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A multi-channel sound signal acquisition system based on arm

A sound signal and acquisition system technology, applied in the field of signal processing, can solve the problems of expensive system, high complexity of system hardware and software, unfavorable large-scale promotion of sound signal acquisition system, etc., and achieve the effect of reducing system cost

Active Publication Date: 2020-03-20
HANGZHOU DIANZI UNIV
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  • Application Information

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Problems solved by technology

But such systems are often expensive, especially high-precision and high-speed acquisition systems
And this type of system contains modules such as DSP or FPGA, which often need to be programmed, and the system hardware complexity and software complexity are high
These factors have caused this type of sound signal acquisition system to be unfavorable for large-scale promotion

Method used

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  • A multi-channel sound signal acquisition system based on arm
  • A multi-channel sound signal acquisition system based on arm

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specific Embodiment approach

[0040] The specific implementation of the hardware of the present invention is as follows:

[0041] The system hardware architecture diagram of the present invention is as follows figure 1 As shown, in order to make the whole structure look clear and concise, the figure shows the core hardware architecture of the system, and some structural details are not shown in the figure. The core part of the hardware framework of the present invention includes an ARM platform, an AD module, and a sound signal sensor module, and also includes a front-end conditioning circuit, an SDRAM module, a NandFlash module, an SD card module, an Ethernet interface, and a serial interface. The sound signal sensor module includes 4 sound sensor probes to generate 4 sound signals, and the signals at this time are analog signals. The front-end conditioning circuit is located between the sound signal sensor and the AD module, and its main function is to condition the 4 analog signals output by the sensor...

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Abstract

The invention discloses a multi-channel sound signal acquisition system based on an ARM. A sound signal sensor module converts a sound signal into an analog signal and then outputs the analog signal to a front conditioning circuit. The front conditioning circuit inputs the conditioned analog signal to an AD module. The AD module conducts AD conversion on the analog signal to obtain a corresponding digital signal and transfers the digital signal to an ARM platform through an SPI bus in a special sequence. On the ARM platform, an EDMA module of the ARM is used for achieving ping-pong cache, and the data transmitted from the AD module is stored into the ping-pong cache. The ARM platform stores the data from the ping-pong cache in an SD card module or directly processes the data. The ARM platform is connected with an SDRAM module, a NandFlash module, the SD card module, a serial interface and an Ethernet interface. The multi-channel sound signal acquisition system based on the ARM reduces the system cost and reduces the complexity of hardware and software.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to an ARM-based multi-channel sound signal acquisition system. Background technique [0002] Signal processing is a general term for the processing of various types of electrical signals according to various intended purposes and requirements. Signals are divided into analog signals and digital signals. The processing of analog signals is called analog signal processing, and the processing of digital signals is called digital signal processing. Signal acquisition belongs to the first link of signal processing, and the signal can only be processed in the next step after being collected first. In other words, the object of signal processing can only be obtained through signal acquisition. Therefore, signal acquisition has a crucial impact on the later signal processing. Contemporary computers are the main tool for signal processing due to their powerful comput...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/16G01H17/00
CPCG01H17/00G06F3/162
Inventor 曹九稳陈智勇王建中
Owner HANGZHOU DIANZI UNIV
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