岩石激发极化衰减谱采集系统设计

Acquisition system of induced polarization decay curve of shaly sands

理论和实验研究表明,岩石激发极化衰减谱含有丰富的地层信息,其采集系统对于谱分析至关重要。文章设计了激发极化衰减谱采集系统,该系统由夹持器、恒流源、控制电路和数据采集卡组成。研制了集成运放反馈型高精度可调正负恒流源,以单稳触发器和光电耦合器为基础研制了供电方向和时间控制电路。该系统的研制成功为激发极化衰减谱分析提供了坚实的基础。

The theoretic and experimental results show that the induced polarization decay curve contains sufficient information about the formations. The data acquisition system is very important for the curve analysis. In this paper, an acquisition system of induced polarization decay curve of shaly sands has been designed. It consists a core holder, a current power, a controlling unit and a data acquisition card. A high precision and adjustable current power and the corresponding controlling unit have been made by using an integration operation amplifier. The monostable trigger and photoelectricity coupling are used to make the controlling unit, which is used to control the supplying direction and time.