A Calibration Method for the Logging Instrument Used in Harsh Environments

Due to the impact of harsh environments with temperatures higher than 150 °C, the characteristics of the amplifying circuits of logging instrument can be changed, to cause the large measurement error. Therefore, a new calibration method is proposed to obtain the gain value and offset for pre-amplifier system. This method use multiple calibration signals and based on the last square theory to complete the calibration work. At the experiment of calibration for the multi-parameter formation water logging instrument, the gain error for the pre-amplifier system by this calibration be improve to no exceed 0.15% to compare with over 1% by tradition method.

[1]  D N Vizireanu,et al.  Simple, fast and accurate eight points amplitude estimation method of sinusoidal signals for DSP based instrumentation , 2012 .

[2]  Jie Xiao,et al.  Architecture and application of integrated spatial information service platform for digital mine , 2011 .

[3]  Florence Azaïs,et al.  Fully digital test solution for a set of ADCs and DACs embedded in a SIP or SOC , 2007, IET Comput. Digit. Tech..

[4]  A. Föhrenbach,et al.  SIMPLE++ , 2000, OR Spectr..

[5]  D N Vizireanu,et al.  A fast, simple and accurate time-varying frequency estimation method for single-phase electric power systems , 2012 .

[6]  J. Charbuciński,et al.  The application of PGNAA borehole logging for copper grade estimation at Chuquicamata mine. , 2004, Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine.

[7]  Y. Mukaigawa,et al.  Large Deviations Estimates for Some Non-local Equations I. Fast Decaying Kernels and Explicit Bounds , 2022 .

[8]  Wang Xuegang,et al.  Study of ultra-wideband radar signals-generated technology using two-channel signal generator , 2007 .

[9]  Xiao Liang,et al.  A radio-frequency source using direct digital synthesis and field programmable gate array for nuclear magnetic resonance. , 2009, The Review of scientific instruments.

[10]  Simona Halunga,et al.  Analytical formula for three points sinusoidal signals amplitude estimation errors , 2012 .

[11]  Michael Paul Gough,et al.  FPGA implementation of a delay-line readout system for a particle detector , 2006 .

[12]  Qingsong Ai,et al.  Intelligent monitoring and diagnosis for modern mechanical equipment based on the integration of embedded technology and FBGS technology , 2011 .