摘要
声波测井仪器中的发射换能器发射的声功率越大,声波测井波形的幅度就越大,测井资料的质量就越有保证。从这个意义上说,最有效地激发声功率是提高声波测井仪器性能或测井资料质量的一个重要的技术手段。用在线测量的声波测井仪器的导纳圆参数可以分析发射电路与换能器的匹配情况。文章首先给出了一个动态试验结果,用小的感性负载串联到换能器的回路后,换能器发射声波的能量提高了近一倍。然后用单频的电路阻抗模型简单地分析了提高发射声功率的原因。最后通过一个计算例子指出,在某些频率,由于有相位因素的影响。
The larger acoustic power of the acoustic logging tool is,the larger amplitudes of waveforms of acoustic logging are,and the higher quality of acoustic data is. The most effective emittance is most important technical way to improve the acoustic logging tool. With the help of measured impedance or conductance data of the transducer,the coupling of transmitted circuit and transducer can be studied. The paper gives an experimental result. If a series excitation coil is used in the transmitted circuit,the amplitude of acoustic wave will increase. This influence is analysed by the phasor model. A calculating example displays that the voltage on the transducer larger than the source as the couple is well.
出处
《石油仪器》
2005年第2期63-65,92,共3页
Petroleum Instruments
关键词
声波测井
换能器
匹配
导纳圆
acoustic logging,transducer,coupling,conductance circularity
