Acoustic sensor array control circuit for acoustic camera and control method thereof
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An acoustic sensor and array control technology, which is used in material analysis, scientific instruments, television, etc. using sonic/ultrasonic/infrasonic waves. Achieve the effect of high integrity, improve stability and improve reliability
Pending Publication Date: 2019-04-30
四川天源宏创科技有限公司
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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 cau
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Embodiment 1
[0032] As shown in the figure, the acoustic sensor array control circuit for an acoustic camera of the present invention includes:
[0033] The acoustic sensor array is used for inductively collecting the sound signal of the sound source;
[0034] The digital sound signal processing module (model is ADAU7002), is used for receiving the sound signal to process and convert into digital signal, and the digital sound signal processing module is electrically connected with the main control unit;
[0035] The main control unit is used to send an excitation clock signal to the acoustic sensor array and receive a digital signal and an optical image, and obtain an acoustic data frame and an image data frame according to the digital signal and optical image processing;
[0036] The main control unit includes a crystal oscillator, a bit clock phase-locked loop, a byte phase-locked loop, a bit clock distribution unit, a byte clock distribution unit and a converter. The crystal oscillator ...
Embodiment 2
[0050] On the basis of embodiment 1, the number of sensors satisfies 2 n , the mechanisms of digital sound signal processing and data transmission are correspondingly expanded according to the distribution scheme of Embodiment 1, and the clock synchronization can be completed.
Embodiment 3
[0052] On the basis of Embodiment 1, the number of sensors can be adjusted according to actual demand, and the number of sensors can be increased or decreased.
[0053] Among them, taking 128 sensors as an example, based on the formation of the sensors in Embodiment 1, correspondingly expanding the branches, the array arrangement of 128 sensors can be completed, thereby obtaining an acoustic sensor array with good synchronization .
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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 ...
Claims
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Application Information
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