Acoustic sensor array control circuit for acoustic camera and control method thereof

Abstract

The invention discloses an acoustic sensor array control circuit for an acoustic camera. The acoustic sensor array control circuit comprises an acoustic sensor array, a digital acoustic signal processing module and a main control unit. The main control unit comprises a crystal oscillator, a bit clock phase-locked loop, a byte phase-locked loop, a bit clock allocation unit, a byte clock allocationunit and converters. The acoustic sensor array is provided with 8 branches, and each branch is uniformly provided with 8 acoustic sensor units. The 8 acoustic sensor units comprise 4 main channel sensors and 4 accessory channel sensors. The beneficial effects are that the plurality of acoustic sensor units arranged on the acoustic sensor array comprise the main channel sensors and the corresponding accessory channel sensors; and the same main control unit sends a clock source signal, and the signal is distributed to the sensor units of the array through a distributor, so that clock signals from the same clock source are transmitted to the acoustic sensors, and clock signal synchronization of the acoustic sensor units is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of sound source analysis, and in particular relates to an acoustic sensor array control circuit for an acoustic camera and a control method thereof. Background technique [0002] Among sound and image integrated acquisition technologies, acoustic cameras are cutting-edge measurement equipment that visualizes sound, and are new technology equipment required in various fields such as multimedia information communication equipment, home appliances, automobiles, and construction. An acoustic camera is a special device that uses an array of acoustic sensors to measure the distribution of sound fields within a certain range. It can be used to measure the position of the sound emitted by an object and the state of sound radiation, and display an intuitive image in the form of a cloud image, that is, acoustic imaging measurement. [0003] The acoustic sensor array uses multiple acoustic sensors to measure the sound ...

AI Technical Summary

Problems solved by technology

Multiple acoustic sensors on an existing acoustic sensor array send signals to different sensors from different clock sources, but the transmission of different clock sources will cause the signals of the acoustic sensors to be out of sync, resulting in poor synchronization of signal acquisition. Thus affecting the low accuracy of acoustic sensor array acquisition

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