Design of a Cavity Volume Measurement System Based on Sound Pressure Method
In industrial production, a large number of precision small containers or chambers are usually involved, and their volume needs to be accurately measured. For products with irregular internal structures, conventional measurement methods cannot easily and effectively achieve volume measurement. A volume measurement system based on sound pressure method was designed to address the above issues. The system mainly consists of Micro Controller Unit (MCU) main control module, audio circuit, microphone, receiver, etc. During measurement, the receiver emits a fixed intensity detection sound, and the main control module collects the sound pressure inside the test chamber through a microphone, and calculates the volume based on the known sound pressure-volume conversion relationship. The experimental results indicate that within the range of 0.1～5.0 mL, the error of the test results meets expectations. The system can directly measure the volume of small cavities, with stronger applicability, simple structure, and convenient operation, which can effectively reduce the difficulty of measurement operation and equipment complexity.
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