SU949624A1 - Time interval meter - Google Patents

Description

(54) BPEMEHHbiX INTERVAL METER

one

The invention relates to a measurement technique and can be used in measurements with a given relative error of time intervals varying within wide limits.

A device comprising a generator, an And element, a frequency divider, a tape and a multiplexer {t.

The disadvantage of the ordered device is its complexity.

Closest to the proposed technical entity is a device for measuring time intervals, containing sequentially. connected generator, element And, counter and buffer register 2.

A disadvantage of the known device is the need to store a large amount of data.

The purpose of the invention is to simplify the device by reducing the volume of measurement data while maintaining the specified measurement accuracy.

The goal is achieved by the fact that, in a device containing a series-connected generator, an element I, a bolt and a buffer register, are entered a control unit 1 and a counter for shifting pulses, the generator output being connected to the first input of the control unit, the first output of which is connected to the information input of a scoop the shift pulses and the shift input of the buffer register, the output of the last bit of which is connected to the second input of the control unit, the second output of which

10 is connected to the setup input of the shift pulse counter and the control input of the buffer register, the start-pulse bus is connected to the second input of the element I, the stop-pulse bus is connected to the third input

15 of the control unit and the bus stop for shifting the buffer register.

The drawing shows a functional diagram of the meter time intervals.

The meter contains a generator 1, block 2

20 controls, counter 3 shift impulses, buffer register 4, element 5, count 4Hk 6.

Claims (2)

The device works as follows. Let it be necessary to measure with a given relative error the duration of time intervals, having a common beginning, the duration of which can vary from t to IK. In the initial position (up to time point IH), counter 6, buffer register 4 and counter 3 shift pulses are in zero states, element 5 does not pass pulses from the output of generator 1 to the input of counter 6, and block 2 controls the pulses from output the generator I to the input of the counter 3 shifting pulses and the shifting input of the buffer register 4. After on, the Steps to the second input of the AND-5 element of the start-pulse from the output of the generator 1 through the element 5 And the input of the counter 6 starts to receive pulses, while the buffer register 4 tracks with counts and 6. To measure the temporal duration of Tervala, i, I gdei € - 1 to 71 m. At the moment of time, the third input of control unit 2 and the stop stop input of buffer register 4 is fed to a stop impulse, which firstly ensures that the buffer register 4 stops the tracing of binary counter 6 (then the code pattern recorded in buffer register 4 corresponds to the value of the measured value tj, secondly, the receipt of imputations from the output of the generator 1 through the control unit 2 to the shift input of the buffer register 4 and the input of the counter 3 shift pulses. In the buffer register 4, the code shift Combinations up to occurrence in the higher order of the buffer register 4 1, simultaneously shifting pulses are counted by the counter 3 shifting pulses. When appearing 1 in the older discharge of the buffer register 4, the second input of control unit 2 receives a signal that ensures the termination of the pulse from the generator output 1 through the control unit 2 to the shift input of the buffer register 4 and the input of the counter 3 shift pulses. After reading the code sequence from the upper bits of the buffer register 4 and from the counter 3 shifting pulse In this way, the control unit 2 ensures that the buffer register 4 keeps track of the counter 6 and sets the counter 3 shift pulses to O. After this, the meter is ready for the next measurement. When measuring, with a predetermined relative time interval, varying within wide limits, the use of the proposed meter will reduce the amount of stored data. For example, when measuring with a relative error of 2% of the durations of the time intervals from tH 10 to IK 0.1s, the volume of the data stored is more than doubled. Claims The time meter, containing a series-connected generator, element I, a counter and a buffer register, is about 0, and is based on the fact that, while maintaining a given measurement accuracy, a control unit and a counter pulse shifter, I, the output of the generator is connected to the first input of the control unit, the first output of which is connected to the information input of the counter of shifting pulses and the shifting input of the buffer register, the output of the last bit of which under Switched to the second input of the control unit, the second output of which is connected to the setup input of the shift counter pulses and the control input of the buffer register, the start-pulses command is connected to the second input of the element I, the stop pulse width is connected to the third input of the control unit and the buffer shift stop bus register. Sources of information taken into account during the examination 1. Author's certificate of the USSR N 450130, cl. G 04 F 10/04, 1976. 2. Physics of fast processes. M., Mir, 1971, t. 1, p. 39