SU563634A1 - Apparatus for measuring velocity - Google Patents

Description

N,

TO

N ..

and the frequency of the generator. unit.-L / where / C - gear ratio; Lsch unit. - the capacity of the meter unit; . Otosh. - transfer counter capacity

relationship;

N - the number of signals in 1 sec. Depending on the magnitude of the gear ratio, one of the meters is filled faster than the other. If (1, then first the counter 7 overflows, the output of which through the indicator coincidence circuit 5 passes to the indicator 9 of the traveled distance unit. The indicator can be executed integrating — in the form of a distance traveled counter or movement speed. disables trigger 4, and the pulses from the generator to the counters are stopped until the next input signal arrives. In counter 7, the difference is stored

D Lcsch. - Lsch.ed.izm.

After the arrival of the second signal, a difference of 2A is stored in the counter 7, and so on. Through Lo turns the difference becomes equal to the unit of measurement.

N ..

/ Zft

Sch. counted units

And the counter 7, via the coincidence circuit 5, produces an additional output signal at the start of operation of the trigger 4 and another output signal after the secondary overflow of the counter 7 from the generator 10. Thus, the maximum conversion error is always less than one revolution.

If, first, counter 8 overflows, the output of which disables trigger 4 and stops the flow of pulses from the generator to the counters until the next input signal arrives. In counter 7, the difference is stored

A. Unit. -LA, P0, 1, 2 ...

Through By turns loA takes the value Lsch. edm- and A 0. Next input signal

does not cause the movement of the counter 7 and the trip distance indicator. Thus, in this case, the conversion error is always less than turnover. Pulses of the unit of measurement of the distance arrive at the distance indicator after the rotational speed sensor makes the required number of them without averaging the number of revolutions or units of distance. If necessary, you can change the conversion factor of one of the counters 7, 8 and thereby change the unit of measure. To change the conversion factor, it is enough to change the capacity of only one of the counters, for example, install a switch or jumpers (connections) in its decoder.

Claims (3)

1. US patent number 3708150, class. 324-173, 1971. 2. US patent number 3787769, cl. 324-173, 1973. 3. US patent number 3739270, cl. 324-173, 1972.