SU437985A1 - Device for threshold period control - Google Patents

Description

one

The invention relates to the field of measuring tech- nics and can be used to create devices for the control of random variables on a given parameter.

The known devices for the normative monitor of the neurode containing the input driver, the reference frequency generator, the counters and indicators of the number of impulses are sufficient and do not even predict the possibility of determining the functional distribution of the neorod with a random input signal.

The purpose of the invention is to simplify the device and expand its functional capabilities.

This is achieved by the fact that one iidicato of the number of pulses is connected; to the input driver directly, and the other through the AND circuit, the second input of which is connected to a trigger connected via a non-switch to the outputs of the decoder, whose inputs are not connected to the counter.

The drawing shows the block diagram of the proposed device.

The device composes the input device 1, the generator 2 emulses of the reference frequency, the counter 3 imiulsov, denlifratora 4, the trigger 5, the circuit "And 6,

2

8 numbers

two indicators

PULSE AND SWITCH 9.

The device works as follows.

The signals, whose periods are to be measured, are fed to the input of the driver signals, which are the crust of them with narrow rectangular impulses. These pulses are received on the indicator 8, the number of pulses, their counting, their number during the measurement time and the input of the installation of the initial state of the counter 3. This counter calculates the non-periodic pulse that was received from the generator 2 and zero elapsed frequency. The decoder when switching the triggers of the counter 3 outputs the outputs of the pulses, which are quantized with a predetermined time step and the iphoid of the input signal. By activating trigger 5 to the corresponding, their output of the de-inflator minimizes the generation of a gain, its weight of the required duration, the start of which from the input pulse is set in accordance with the value of the measured differential differential of the period of the input signal.

A queue input pulse is fed to the circuit "And biv in the case of the presence of a control potential at its second input, passes through the indicator 7 of the number of pulses. Thus, indicator 7 counts the amount

only those pulses that coincide in time with the trigger potential 5. The pulse number indicator 8 counts the total number of pulses during the measurement time, so after the measurement time expires, the ratio of the number of pulses recorded in indicators 7 and 8 gives an estimate of the probability of occurrence of the input signal period at a given interval.

Subject invention

A device for threshold period monitoring, a counter, to the inputs of which are connected the outputs of the input signal generator and the reference frequency generator, and indicators of the number of pulses, characterized in that, in order to expand the functionality and simplify the device, it is equipped with serially connected decoder connected to it through a switch trigger and the circuit "And, the output of which is connected to the input of one of the indicators of the number of pulses, the other input of the circuit" And is connected to the input of the second indicator connected to the output of the driver input signals, and the decoder input is connected to the output of the counter.