CAJ | 학술논문

为了得到更稳定的声速，提出了一种根据声管中不同位置处声压的频率响应特点测量声速的新方法。本方法选取2个距离适中的水听器为测量传感器，不需要改变水面位置和传感器位置，操作简单、数据处理方便、测量误差很小。可以应用于有压力的工况。消除了位于声管底部声源发射换能器处反射系数对声速测量的影响。仿真结果说明了函数的周期性以及频差的稳定性。通过实验测量，验证了方法的正确和可靠。根据频率响应精确测量水声声管中的声速，为声管测量系统提供准确的参考，保证了测量精度。
위료득도경은정적성속，제출료일충근거성관중불동위치처성압적빈솔향응특점측량성속적신방법。본방법선취2개거리괄중적수은기위측량전감기，불수요개변수면위치화전감기위치，조작간단、수거처리방편、측량오차흔소。가이응용우유압력적공황。소제료위우성관저부성원발사환능기처반사계수대성속측량적영향。방진결과설명료함수적주기성이급빈차적은정성。통과실험측량，험증료방법적정학화가고。근거빈솔향응정학측량수성성관중적성속，위성관측량계통제공준학적삼고，보증료측량정도。
Based on the characteristics of frequency responses at different positions , a new method of sound velocity measurement in a sound tube is suggested to get more stable sound velocity .Two hydrophones with moderate dis-tance are adopted for measuring sensors , and it does not need to change the position of the water surface and the sensor position .The operation of the experiment is simple , and the data processing is easy .The fluctuation of fre-quency differences is small .It can be used in the condition that pressure exists .The influence of the reflection coef-ficient of the transmitting transducer on the bottom of the sound tube is eliminated .As a result , more accurate sound velocity is obtained .Simulation results demonstrate the periodicity of the function and the stability of the frequency differences.The accuracy and reliability of this method are proved by the experiment's results.The local sound ve-locity can be measured correctly with the frequency response .This method offers an accurate reference for the sound tube measurement system .The precision of the measurement can be ensured .