SU871149A1 - Device for period tolerance control - Google Patents

Description

I

The invention relates to a measurement technique and can be used for the tolerance control of random variables in a given parameter.

A device for tolerance control of a period is known, comprising a driver for input signals, a reference generator, a pulse counter, an exemplary measure set in digital form, a comparator device and an indicator device Cll.

A disadvantage of the known device is the presence of an exemplary measure and a comparison device, which complicates the circuit and reduces the accuracy of the tolerance control.

The closest in technical essence to the invention is a device for a threshold period monitoring, containing a driver for input signals, a reference generator, a pulse counter, a decoder, whose input is connected to the output of a pulse counter, and an output through a switch to a separate control trigger input, a control counter , its input through the circuit And connected to the output of the control trigger, and the period counter C23.

This device controls the number of period values falling within a given interval, and does not provide automatic tolerance control of the probability that the random values of the period are exceeded by a predetermined threshold level.

The aim of the invention is to extend the functionality

10 devices by providing automatic tolerance control of the likelihood of exceeding a given threshold.

The goal is achieved by the fact that in a device for tolerance control of a period, containing a pulse shaper, a period counter, a reference generator, the output of which is connected to the counting input of a pulse counter, the outputs of which

20 through a serially connected decoder and a switch are connected to the first control trigger input, the output is connected to the first input of the AND element, the output of which is connected to the counting input of the control counter, a valve, a control unit, a decoder, a switch, an alarm trigger and an indicator are added, and shaper output

30 pulses connected to the first input

the valve whose output is connected to the installation input of the pulse counter, the counting input of the period counter, the second input of the And element and, through the control unit, to the second input of the control trigger, the outputs of the control counter through the serially connected additional decoder and switch are connected to the first input of the alarm trigger, the second input which is connected to the Reset bus, and the outputs - to the information inputs of the indicator, the control input of which is connected to the output of the period counter and the second input of the valve.

The drawing shows a block diagram of a device for period control.

The device for period tolerance control contains a shaper -1 pulses, a reference generator 2, a pulse counter 3, a decoder 4 whose inputs are connected to the output of counter 3, and the outputs through switch 5 to the first trigger input of the control, the counter 7 of the control element 8 is connected to the trigger output of the control, a 9-period counter, additional decoder 10 with a switch 11, an alarm trigger 12, an indicator 13, a controllable valve 14, and a control unit 15.

The output of the driver 1 is connected to the input of the controlled valve 14, the other input of which is connected to the output of the counter for 9 periods. The output of the valve 14 is connected to the inputs of the counter 3 pulses, the counter 9 periods of the element 8 And, the control unit 15, the output of which is connected to the second input of the trigger 6 kbntrol. The output of the control counter 7 is through an additional decoder 10 and a switch 11 is connected to one of the alarm trigger 12 inputs, the outputs of which are connected to the indicator 13, the second alarm trigger 12 input is connected to the Reset bus,

In order to automatically obtain in the control counter 7 the desired value of the probability of a predetermined threshold by a random period, the ratio of the number of pulses recorded in counters 7 and 9, the period counter 9 is made with a capacity of 10, where n 1,2,3

The decoder 4 is constructed so that. pulses at its outputs correspond to exceedances of instantaneous values of the period for setting threshold levels. Pulses at the outputs of decoder 10 appear when the values of the probability of exceeding a given threshold become greater than some limits considered acceptable. In this case, the switch 5 serves to set a specific threshold period value, and the switch 11 to set the permissible probability value

Indicator 13 provides two Goden Light, Not Goal.

If necessary, it may also contain an executive body that provides automatic control of the monitored process.

When the logical 1 device is turned on via the bus, the reset briefly acts on the trigger 12 of the alarm and sets it to the zero state. In the initial position, when signals are not received at the input of the device for tolerance control of the period, the number corresponding to zero. In this case, logical 1 at the output of the counter 9 periods prepares the controlled valve 14 for opening and turns off the light displays Goal, Not suitable indicator 13, Logic O at the output of the driver 1, and therefore, at the output of the controlled valve 14 closes the counter 3 pulses and element 8 I.

When a signal arrives at the input of the imager 1, a rectangular impulse appears at the output of the latter, the duration of which corresponds to an instantaneous value (the controlled period. Through the controlled valve 14, the rectangular impulse affects the control unit 15 and sets the trigger 6 to the zero state In addition, the signal at the output of the controlled valve 14 opens the counter 3 pulses, which counts the pulses of the reference generator 2, prepares element 8 I for opening, and is fixed by the counter 9 at.

If the monitored instant period value is less than the specified threshold, there is no signal at the corresponding output of the decoder 4, the control trigger b does not change its width, and at the output of element 8 AND does not appear logical 1, but if the instantaneous value of the period exceeds the predetermined threshold, at the moment when the output of the decoder 4 is exceeded, logical 1 appears, which through switch 5 sets the trigger 6 to the unit state. In this case, the output element 8 also appears logical 1, which, in turn, registers TC counter 7 control.

Claims (1)

The monitoring process continues until the 9-period counter capacity is filled. At the same time, a logical O appears at its output, which closes the controllable valve 14 and connects the indicator 13. Since the capacity of the 9 period counter is set to 10, at the end of the TICOHTP monitoring time, the control counter 7 has a recorded number corresponding to a random probability period before a given threshold. If by the end of the Tco, the probability rate recorded by the counter 7 is less than permissible, then the signal at the corresponding output of the decoder 10 is absent, and the trigger 12 does not change its state. At the same time, when the indicator 13 is turned on, the Goden board lights up. If, however, the probability value in the counter 7 exceeds the permissible value, then at the moment of exceeding at the output the deshfrarator .10 appears logical 1, which through the switch 11 sets the trigger 12 to the one state. In this case, when the indicator 13 is turned on, the light panel lights up. Not suitable. This device for period control differs favorably from the known one, because by introducing additional nodes and connections, it provides automatic tolerance control of the probability of a predetermined threshold being exceeded by a random period, which allows to automate the production process, increase labor productivity and the quality of products. The device for tolerance control period, containing a pulse shaper, a period counter, a reference generator, the output of which is connected to the counting input of the pulse counter, the outputs of which through serially connected decoder and switch are connected to the first control trigger input, the output of which is connected to the first the input element And, the output of which is connected to the counting input of the control counter, characterized in that, in order to expand the functional capabilities of the device, A valve, a control unit, a decoder, a switch, an alarm trigger and an indicator are entered; the output of the pulse shaper is connected to the first input of the valve, the output of which is connected to the setup input of the pulse counter, the counting input of the period counter, the second input of the And element and through the control unit to to the second control trigger input, control counter outputs through a series-connected additional decoder and a switch connected to the first alarm trigger input, the second input of which connected to the bus Reset, and the outlets - to the information inputs of the indicator, the control input of which is connected to the output of the period counter and the second input of the valve. Sources of information taken into account in the examination of 1, Tsapenko M, P. Measuring information systems, M., Energie, 1974, p. 238. 2, USSR author's certificate W 437985, cl. G 01 R 29/02, 1976 (prototype). C $ grew fr t T f / f LI / G IT g g 1 J one