【摘要】 介绍了一种基于LPC2194的水听器全频测试仪,用来在施工前确定检波器的好坏。全频测试仪采用绝对测量法对水听器各项性能参数进行测试,即在相同条件下测量未知待测水听器和声压计的响应,计算出待测水听器的最终响应值。测试仪硬件主要由信号源模块、功率放大模块、数据采集模块和串口通信模块等几部分组成,利用A/D转换芯片AD7705和AD7899进行数据采集,并采用串口与PC机通信,通过上位机进行显示;下位机软件采用Keil对主控制器进行编程,上位机采用VC6.0。利用本测试仪对被测水听器作了多次重复性试验,将测得参数与标准参数进行对比,结果表明,本系统稳定可靠,操作方便灵活,测试结果准确。更多还原

【Abstract】 This paper introduces a Hydrophone full-frequency tester based on LPC2194,the tester was tested before construction so as to ascertain its performance.The full-frequeney tester uses absolute measurement to test the performance parameters of Hydrophone,that was the response of unknown Hydrophone and sound pressure meter was tested under the same conditions and then the final value of the response of Hydrophone was calculated.Tester was mainly consist of signal source modules,power amplifier modules,data acquisition modules and serial communication modules,A/D converter chip AD7705 and AD7899 are used to design data capture circuit,the serial port was used to communicated with PC,the results were display by the host computer;the main controller was programmed by Keil,the host computer using VC6.0.The tester measured using the hydrophone made many repetitive tests,the parameters compared with the standard parameters,the results show that the system was reliable,flexible operation and results accurate.更多还原