DIGITAL ANALYTICAL UNIT FOR X-RAY FLUORESCENT SPECTROMETERS

摘要

The invention relates to the field of X-ray instrumentation and can be used for accurate analysis of the composition of substances in a wide dynamic range. The device contains a proportional counter, preamplifier-shaper, stabilized power supply for the preamplifier-shaper, pulse generator, multiplexer, comparator, reference voltage source, scaling unit, blocking of distorted pulses, control unit, self-diagnostic unit, analog-digital and digital-analog converters, high-voltage module, high-voltage module adjustment unit, high-voltage control unit, and RS-485 interface unit. A proportional counter is connected through a series-connected preamplifier-shaper, multiplexer, and scaling unit to an analog-to-digital converter and to the first input of a comparator unit. The second input of the comparator is connected to a digital-to-analog converter, which is connected to the reference voltage source. The output of the comparator unit is connected to the first input of the control unit through the blocking of distorted pulses, the third input of which is connected to the high-voltage module through the high-voltage control unit. The input of the high-voltage module is connected to the first output of the control unit through the high-voltage module adjustment unit, the second output of which is connected to the second input of the multiplexer via a pulse generator and a self-diagnostic unit. The remaining outputs of the control unit are connected respectively to the control inputs of the digital-to-analog converter, the self-diagnostic unit, the multiplexer, the scaling unit, the comparison unit, the analog-digital converter and the RS-485 interface unit, the output of which is the output of the device. measurements by detecting and preventing the registration of a distorted signal. 1 il.