SU421009A1 - DEVICE FOR ADMISSION CONTROL OF THE AMOUNT (DIFFERENCE) OF TEMPORARY INTERVALS - Google Patents

Description

one

The invention relates to electrical measuring equipment and can be used to extend the functionality of devices for tolerance control of the sum (difference) of time intervals.

A known device for tolerance control of the amount (difference) of time intervals, comprising a forming trigger, nominal trigger, AND circuit, OR circuit, nominal counter time selector, AND reverse circuit, nominal counter, programmable coincidence circuit, analyzing part formed by And with triggers, the time counter of the result counter, the result counter with the overflow scheme, the reference frequency generator, the programmable frequency divider and the programming device, are characterized by narrowed functions. opportunities.

The proposed device, in order to expand its functionality, is equipped with a reversible counter of nominal, recalculating trigger, trigger of reverse of the counter of nominal values, the counting input of which is connected to the output of the “And reverse” circuit, the first input of which is connected to the programming device as well. the second - with a zero output of the forming trigger, a single output associated with a single input trigger nomin2

la, and zero - with a counting input of the counting trigger.

Ia the drawing shows the block diagram of the proposed device.

5 The device consists of forming and counting triggers 1, 2; trigger 3 face value; schemes “And 4, 5; schemes “OR 6; temporary selector 7 nominal counter; schemes “And 8 reverse; trigger 9 reverse; reversible counter 10 denominations; programmed matching circuit 11; the analyzing part formed by the match schemes 12-15 and the triggers 16-19; the time selector 20 of the result counter; a result counter 21 with overflow circuit 22; reference frequency generator 23; programmable divider 24 frequency; programming device 25. The device operates as follows.

0 In the initial state, all the triggers and counters are reset to zero, the time selectors of the nominal and result counters are closed, the dividers 24 frequencies according to the program contain the division factor, the programmable circuit

5 11 matches the nominal value of the measured value is entered in fractions of the tolerance field. When measuring the sum of two time intervals with the leading edge of the first measured time interval, the formative

0 trigger 1 and trigger 3 nominal are translated to

the state "1", as a result of which the selector 7 opens, and the filling of the counter 10 of the nominal values begins. The back front of the nerve time interval trigger 1 returns to its original state, trigger 2 does not return to the state "1, changing the state of trigger 3 to zero. The key 7 is closed, and the filling of the counter 10 is stopped. Upon receipt of the second time interval, the filling of the counter resumes.

After the number of pulses in the counter 10, corresponding to the nominal pressure of the measured value in the tolerance zero, the coincidence circuit 11 generates a pulse that, acting on the zero input of the trigger 3, returns it to its original state. Since now the trigger 1 and the trigger 3 are in different states, the AND 5 circuit operates and the OR6 key opens the key 20, and the result counter 21 begins to fill. At the same time, the circuit “AND 13” is triggered, the trigger 18 enters the state “1 and closes the circuit“ AND 14. The single state of the trigger 18 indicates that the measured value is sick: e is nominal.

When the trailing edge of the second time interval arrives, the key 20 is closed. If the measured sum of the interval is outside the tolerance, then the circuit 22 is triggered, the trigger 19 goes to the state "1" and from its zero output the signal "not valid" is output. If the circuit 22 did not work, then at the measurement of the state of the trigger 2 through the circuit "And 12, the trigger 16 is triggered and through the open circuit" And 15, the signal "is issued.

If the sum of the two measured time intervals is less than the nominal value, the trailing edge of the second time interval will come earlier than the impulse from the output of the court 11 scheme, the triggers 1, 2 will return to the initial state, the AND 14 circuit will trigger “1 and close-1 circuit” AND 13. At the same time, the “AND 4” circuit works and through the “OR 6” circuit the selector 20 opens. The filling of the counter 21 continues until the torus 11 coincides with a pulse 3.

When measuring the difference of time intervals from the programming device 25, an opening potential is applied to the circuit And 8, as a result, the trigger 1 through the circuit "And controls the trigger 9 of the reverse." In the initial state, the trigger 9 of the reverse determines the addition mode of the counter 10. From the leading edge of the first time interval, trigger 1 through the And 8 scheme transfers the trigger 9 of the reverse to

state "1.

During the first interval, the counter 10 is filled in subtraction mode. With the arrival of the leading edge of the second interval, the trigger transfers the trigger 9 to the initial state,

and the counter 10 operates in the add mode. From the moment of the resetting of the counter 10, the formation of the nominal value of the time difference begins. Scheme 11 of the match registers the programmed value of the difference, and then, the same switchings follow as with the addition of time intervals.

Subject invention

A device for pre-trigger control of the amount (difference) of time intervals, containing a forming trigger, a nominal trigger, an AND scheme, an OR circuit, a nominal counter time selector, an And reverse scheme, a nominal counter, a programmable coincidence circuit, an analyzing part formed by the AND diagrams and triggers, a time counter for the result counter, a result counter with an overflow scheme, a reference frequency generator, a programmable frequency divider and a programming device, characterized in that, in order to expand functionality, it is equipped with a reversible nominal counter,

a counting trigger, a reverse trigger for a nominal counter, the counting input of which is connected to the circuit output, “And a reverse, the nerve input of which is connected to the programming device, and the second to the zero output of the forming trigger, a single input connected to the single input of the nominal trigger, and zero - with a countable entry of an uncountable trigger.

Fit