High-directivity low-frequency sound wave transmission and measurement device and method
A low-frequency sound wave and measuring device technology, which is applied in measuring devices, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, and using sound waves/ultrasonic waves/infrasonic waves for material analysis, etc., to achieve the effect of simple device structure
Inactive Publication Date: 2017-04-26
SHANGHAI UNIV
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[0004] The purpose of the present invention is to overcome the problems that there is no special high-directivity low-frequency sound wave emission and measurement device at present, and provide a high-directivity low-frequency sound wave emission and measurement device and method, which can realize the emission of high-directivity low-frequency sound waves and measure
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[0019] Preferred embodiments of the present invention are discussed as follows in conjunction with the accompanying drawings:
[0020] see figure 1 , a high-directivity low-frequency sound wave emission and measurement device, including a computer 101, a signal processor 102, an acoustic parameter array 103, a sound level meter 104 and a data acquisition card 105, and the computer 101 is connected to the data acquisition card through wires in turn 105. The signal processor 102 and the acoustic parameter array 103 form a sound wave emission system; the sound level meter 104 is sequentially connected to the data acquisition card 105 and the computer 101 through wires to form a sound wave measurement system.
[0021] see figure 2 , a high-directivity low-frequency sound wave emission and measurement method, using the above-mentioned high-directivity low-frequency sound wave emission and measurement device to carry out high-directivity low-frequency sound wave emission and measu...
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The invention discloses a high-directivity low-frequency sound wave transmission and measurement device and a method. The device comprises a computer, a signal processor, an acoustic parametric array, a sound level meter and a data acquisition card; the computer is sequentially connected with the data acquisition card, the signal processor and the acoustic parametric array through wires to form a sound wave transmission system; the sound level meter is sequentially connected with the data acquisition card and the computer through wires to form a sound wave measurement system; a high-directivity high-frequency sound wave is transmitted by the sound wave transmission system, a low-frequency sound wave is generated on a to-be-detected reference position, and a sound wave frequency and a sound pressure level amplitude on the to-be-detected reference position are detected by a sound pressure level detector. The high-directivity low-frequency sound wave transmission and measurement device and the method can achieve remote and high-directivity transmission and real-time measurement of a low-frequency sound wave.
Description
technical field [0001] The invention relates to the technical field of sound wave detection, in particular to a device and method for emitting and measuring high-directivity low-frequency sound waves. Background technique [0002] The high-directivity low-frequency acoustic wave emission technology has broad application prospects in the field of non-contact acoustic resonance detection technology for non-metallic landmines, and has always been a difficult problem in the field of acoustic wave detection engineering technology. High-frequency sound waves (such as ultrasonic waves) have strong directivity, but are severely attenuated in the air and are difficult to transmit and propagate over a long distance; low-frequency sound waves have relatively small attenuation in the air but have strong divergence characteristics. The existing acoustic parameter array can realize the emission function of high-frequency sound waves with high directivity at a relatively long distance unde...
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IPC IPC(8): G01N29/12G01N29/22
CPCG01N29/12G01N29/22
Inventor 王驰宋紫阳梁堃段乃源张朋涛
Owner SHANGHAI UNIV