UDC 621.317.1: 621.3.087.92
HARDWARE AND SOFTWARE IMPLEMENTATION AND EXPERIMENTAL STUDY OF THE RELATED HISTOGRAM METHOD FOR TESTING THE ANALOG INPUT AND CONVERSION CHANNEL OF THE NI PCIE-6321 DATA ACQUISITION BOARD
А. M. Abramov, Ph.D. (Tech.), Associate Professor, Department of IIBMT, RSREU, Ryazan, Russia; orcid.org/0009-0006-7274-5206, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The paper considers the problem of hardware and software implementation of a new method of metro logical testing of ADCs, called coupled histograms method, which reduces the requirements for reference measuring instruments in terms of accuracy class due to the consideration of nonlinear component of meas uring signal (MS). The aim of the work is to experimentally study the method of coupled histograms to con firm the validity of its theoretical conclusions. The object of the study was a 16-bit channel of analog input and conversion of NI PCIe-6321 data acquisition board with integral nonlinearity of 4 LSB (least significant bit). The 16-bit block of NI PCIe-6321 analog output was used to generate initial MS (periodic voltage of triangular shape) and displacement signal (reference voltage). Analog adder was used to shift initial MS up and down. Maximum deviation of actual shape of generated MS from ideal linear shape during the experi ment was 3.1% of MS input range. The results of the experiment showed that a new method, with IC genera tor bit depth and the object of study being the same, can accurately estimate the boundaries of integral non linearity (INL) of the latter compared to histogram method with nonlinear IC. In addition, the results of test ing analog input and conversion channel of NI PCIe-6321 data acquisition board using coupled histograms method and sliding histogram method were compared.
Key words: : histogram, integral nonlinearity, code, data acquisition board, analog-to-digital converter, measuring signal, analog adder, module, experiment.