倾斜度测试并非测试检波器的倾斜程度
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摘要
倾斜度测试是408UL和428XL地震数据采集系统日检验的一个重要检验项目。仪器在进行倾斜度测试时,内置的测试信号源输出一个阶跃脉冲信号,激励检波器线圈产生振荡,输出电信号馈送给放大器,求取各放大器的输出与所有放大器输出的平均值的相对误差,即为该地震道倾斜度测试值。测试原理表明:该项测试是检验仪器包括检波器、大小传输线和放大器等采集设备对脉冲信号的响应程度,而非通常理解的检波器的倾斜程度。在野外采集现场做的调查也证明了这一点。倾斜度测试应该更名为脉冲响应测试。
The tilt testing of 408XL and 428XL seismic data acquisition system is an important daily test item.During the testing,the built-in test signal source of the seismic instrument outputs a step pulse signal to excite geophone coil to shock and then,the geophone outputs a pulse signal to feed to the amplifier.The different betwecn each amplifier and average value of all amplifiers' output is the value of the tilt test.Through analysis on the tilt testing principle,we can see that the tilt test is to test the responsiveness of acquisition device including geophone,transmission line and amplifier on the pulse signal,but not the usually measure the geophone′s tilt.That is proved by the investigation on acquisition site.So the tilt test should be renamed as impulse response test.
The tilt testing of 408XL and 428XL seismic data acquisition system is an important daily test item.During the testing,the built-in test signal source of the seismic instrument outputs a step pulse signal to excite geophone coil to shock and then,the geophone outputs a pulse signal to feed to the amplifier.The different betwecn each amplifier and average value of all amplifiers' output is the value of the tilt test.Through analysis on the tilt testing principle,we can see that the tilt test is to test the responsiveness of acquisition device including geophone,transmission line and amplifier on the pulse signal,but not the usually measure the geophone′s tilt.That is proved by the investigation on acquisition site.So the tilt test should be renamed as impulse response test.
引文
1Sercel公司.428XL user′s manual3.2010.3
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