SU676971A1 - Digital meter of mean duration of time interval series - Google Patents

Description

The invention relates to the field of electrical measuring equipment and can be used in automatic control systems for measuring the average duration of a series of time intervals with regard to their weight characteristics.

A device for measuring the average value of time intervals is known, comprising an exemplary frequency generator, a matching circuit, a collection circuit, a pulse counter, and a control unit 1.

The drawback of the device is the low measurement accuracy.

A known period meter of a harmonic signal period, containing a pulse counter with a memory register at the output, an exemplary frequency generator, the output of which is connected to the first input of the coincidence circuit, and a driver, controls the top, their signals, whose input is connected to the input terminal of the measured signal, and the outputs - with control unit, nm inputs of coincidence circuit, pulse counter and memory register 2.

Such a meter does not measure the average duration of a number of time intervals with regard to their weight characteristics.

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the duration of a number of time intervals, taking into account their weight characteristics.

The goal is achieved by introducing a trigger into the meter, a second coincidence circuit and a collection circuit, the output of which is connected to the input of the pulse counter, the transfer output of the low-order unit of the pulse counter is connected to the trigger input and the first input

second matching scheme. The trigger output is connected to the second input of the second matching circuit, and the outputs of the first and second matching circuit are connected to the inputs of the collection circuit.

The drawing shows a block diagram of a digital meter of the average duration of a number of time intervals.

The meter contains a memory register 1, a pulse counter 2, an equalizing driver 3, a trigger 4, an acquisition circuit 5, an exemplary frequency generator 6, a matching circuit 7 and 8, and an input terminal 9. The device operates as follows.

Before starting the measurement, all elements of the device are reset. With the arrival of the first time interval, the driver 3 opens the circuit R gokp prni and grtrtnk 2 n hmn rt read the number of pulses of the generator 6 arriving at its input through circuits 8 and 5. After the measured interval ends, the driver 3 closes circuit 8 and records the measurement result recorded in counter 2, in register 1 of memory.

When measuring the second and each subsequent time interval, the counter 2 continues to sum the number of pulses of the reference frequency, thereby increasing the result of the previous measurement. At the end of the next measured interval, the driver 3 shifts the number in counter 2 by one digit to the left, and then transfers the contents of the counter to register 1. In this case, each odd transfer unit from the least significant bit of the counter is remembered by trigger 4, and each even through circuit 7 and 5 enters the summing input of the counter 2 and sets the trigger 4 to the zero state. Thus, in the register 1 the integral part is permanently located, and in the trigger 4 it is half the least significant bit of the measurement result.

Claims (2)

1. USSR author's certificate number 68775, cl. G 04F 10/04, 1970. 2.Ornatsky P.P. Automatic measurements and devices. Kiev, "Wish School, 1973, p. 394.