SU1190760A1 - Apparatus for detecting ionizing radiation - Google Patents

Abstract

DETECTION DEVICE (IONIZING RADIATIONS, containing: a detecting unit, including a detector connected to an amplifier, | the output of which is connected to the skip: the input of the regulating element.: The output is connected to the inputs; two amplitude differentials with | discriminators, and the lower one the level of the first amplitude differential discriminator is combined with the upper level of the second, reversible counter, information outputs; - The invention relates to technical physics, in particular to devices for Registration of ionizing radiation The aim of the invention is to improve the reliability of the device, the detection .. The block diagram of the device for detecting ionizing radiation is shown in the drawing.The device contains which is connected to the inputs of a digital-analog converter, the output of which is connected to the control input of the regulating element, and the display device characterized in that, in order to increase its reliability, it additionally introduces two AND schemes, an OR scheme, two decoders and frequency discrimination or, the output of the first and second amplitude differential discriminators are connected to the first inputs of the first and second circuits AND, the outputs of the first and second circuits AND are connected to the summing and subtractive inputs of the reversing counter, respectively, which are connected in parallel with the inputs of the first and second decoders, the outputs of the first and second decoders are connected to the second inputs of the first and second circuits AND, respectively, and the inputs of the OR circuit, the output of which is connected to the frequency discriminator, d which is connected to the display device. QD О О5 detecting unit 1, including a detector and amplifier, regulating. element 2, amplitude differential-discriminators 3 and 4, the first. 5 and the second 6 of the Nevoda diagrams of which are connected, respectively, with the summing and subtractive inputs of the reversible counter 7, whose information outputs are connected in parallel with the inputs of the first and second decipher

Description

tori 8, 9 and digital-to-analog converter 10. Descramblers yyhody, 8, 9 element OR 11 are connected to the input of the frequency discriminator 12 whose output is connected to the display device 13. The detection device works as follows. Pulses whose amplitude spectrum contains a reference peak from the output of the detection unit amplifier 1 through the regulating element 2 are placed on the code of the conjugate amplitude differential discriminators 3 and 4, the lower level of the discriminator 3 is aligned with the upper level of the discriminator 4). The pulses that fall into the window of the first discriminator 3, through the first normally open circuit AND 15 are posted to the summing counting input of the reversible counter 7, and the pulses that fall into the window of the second Discriminator 4, through the second normally open circuit And 6 arrive at the subtracting counting input of the reverse meter . The current state of the counter 7 is converted by the digital-to-analog converter 10 to an analog signal, which is fed to the regulating element 2. The regulating element changes the amplitude of the reference peak pulses so that the average value is kept constant. amplitudes. When the current code value of counter 7 approaches one of the limits of the range of one hundredth, when approaching the upper limit of the range, the first decryptor 8 determines the extreme Biepx position of the range, and when the counter is in this position, the output of the first decipher goes to the second input of the first circuit And 5 and closes it, at the same time on the summing input of the counter, the pulses are not received. The first pulse arriving from the output of the discriminator 4 passes to the subtracting input of the counter and removes the counter from the extreme position. In this case, the first circuit And 5 reopens and transmits pulses to the summed input of the counter. Each time counter 7 is set to the extreme position at the output of decipher 8, an impulse is generated, which is transmitted through the OR 11 circuit to the input of frequency discriminator J2, and if the output frequency reaches the limit, the output signal of the frequency discriminator includes indication. , The same happens .. as the reference peak approaches the lower boundary of the diapason; Thus, with significant destabilizing effects, the frequency of pulses arriving at frequency discriminator 12 increases and increasing: the predetermined frequency is switched on the display device 13. The intensity of the reproduction peak has little effect on its frequency, its exit to the stabilization limits, and therefore the device allows controlling the resolution. measuring path in alternating radiation fields. The imbalance signal arrives when the measuring path is still in | s in the normal operating mode and when the expected exit from the mode is predicted. The threshold of the frequency discriminator is established based on the measurement conditions; as the measurement conditions change, it may change. The threshold is set from the console or programmatically. It is characteristic that when passing the interference (i.e., a single exit to the edge of the stabilization range), the frequency discriminator does not trigger and does not signal a prior misalignment.

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Claims (1)

A DETECTION DEVICE OF IONIZING RADIATION containing a detecting unit including a detector connected to an amplifier (the output of which is connected to a regulating input of a regulating element, the output of which is connected to the inputs of two amplitude differential ^ ^! with the upper level of the second,. reversible counter, information outputs / /