天然气管道远程声通信接收机系统设计方法研究

Design Method of Remote Acoustic Communication Receiver for Gas Pipeline

通过设计远程声信号接收机系统实现天然气管道的有效监测和管道性能检测和故障排除。为了使接收机达到技术指标,滤波器电路的设计中需要带通滤波器设计成至少为16阶的滤波器,然而目前大多数的滤波器都是8阶的。对此具体分析了系统的设计原理及各模块的设计模型,在滤波器设计中,采用了一个8阶低通滤波器(S3528)和一个8阶高通滤波器(S3529)级连,成功设计出了一个16阶的带通滤波器;并对设计出的远程声信号接收机电路进行系统联调测试,测试结果实现了较好的性能指标,输入信号Vi1的峰峰值为2V、频率可变的正弦波,对应的输出信号Vo1的峰峰值结果显示出滤波器较好的性能指标,测试结果表明有效信号范围为0mV^5mV,放大环节,实测放大倍数为44300倍,实测通频带为87Hz^2215Hz,动态范围为34dB。完全符合设计要求,系统性能稳定,能有效应用天然气管道的声通信实践中,为下一步对天然气管道实现声通信远程监测奠定基础。

The remote acoustic signal receiver system was designed for effective monitoring of the natural gas pipeline, the fault diagno- sis and detection was realized based on this system. According to the technical index of the receiver, the band pass filter should be designed into at least 16 orders. Currently, the existing filters almost were 8 orders. The design principle and each module were analyzed in detail. In the filter design procedure, the 8-order low pass filter （S3528） and 8-order high pass filter （S3529） were used with cascade connection. The 16 orders band pass filter was designed successfully. Simulation and experiment was completed out finally. Test result shows nice perform- ance of the property. When the input signal Vii was the sinusoidal wave with peak-peak value is 2V and changeable frequency. The corre- sponding output signal Vol is normal and sows excellent index performance f the filter, all the test results meet to the requirement of the sys- tem. Experiment result shows that the effective signal range is 0mV-5mV. The enlargement factor is 44300, and the real frequeney band is 87Hz-2215Hz, and for the AGC, the control point is 0. lmV and the dynamic range is 34dB. The test property is stable and it meets the de- mands of the fuse system design. The research result provides good base for the next remote monitoring for the gas pipeline based on acoustic communication.