SU645288A1 - Apparatus for remote checking of telephone set dial parameters - Google Patents

Description

connected to the first input of the adder 10 and to the inputs of the dividers 6, 7, the outputs of the coyur through the corresponding units of comparison 8, 9 are connected to the other inputs of the control unit, connected to the controllers 13-16. The output of the second time-voltage converter 5 is connected to other inputs of the comparison blocks 8, 9 and to the second input of the adder 10, the output of which is connected via the amplitude selectors 11, 12 to the additional inputs of the control unit connected to the output of the input package counter.

The device works as follows.

Measured non-rectangular parcels (Fig. 2, a), formed by the telephone dialer, are fed to the input transducer 1 of rectangular pulses into rectangular pulses, which form a direct (Fig. 2, b) and inverse (Fig. 2, c) a sequence of rectangular pulses, each of which is equal to the duration of the opening and closing contacts of the dialer.

These pulses are fed to a control unit that performs the following functions:

at the beginning of the first opening of the series (moment ti, fig. 2, d) it forms a pulse of resetting the counter 3 input packages;

at the same time, generates a pulse of zeroing converters 4, 5;

at the time of the end of each opening (moments 4. 4, 6 ..., fig. 2, e) generates a pulse of progress of the counter 3 input packages;

at the moment of termination of each closure (moments ts, is, t -..., fig. 2, e) analyzes the output voltages of blocks 8 and 9 and amplitude selectors 11 and 12, after which it generates a zeroing pulse of the converters 4, 5;

controls indicators 13-16.

As a result, at the beginning of the first opening, the 3 input parcels recorded the figure “O (the counter 3 of the parcel number was reset), and the output voltages of converters 4 and 5 and the adder 10 voltages are also zero.

During the first opening, the voltage at the output of converter 4 rises (Fig. 2, w, this voltage rises also at the output of voltage dividers 6, 7 and adder 10 (during the first opening, the voltage at the output of converter 5 is zero, fig . 2, h).

The division factor of the dividers 6, 7 voltage is set equal to the boundary-acceptable values of the norm of the pulse coefficient, for example, 1, 4 - for divider 6 and 1, 7 - for divider 7.

At the time of the end of the first unlock

A count of 3 input packages counts one pulse.

The output of converter 4 (proportional to the duration of the first opening) at the end of the first opening (moment 2) is fixed and stored for the entire time of the first closing. Now during the first closure, the voltage at the output of the converter 5 grows

(Fig. 2, h), as well as at the output of the adder 10.

Thus, by the time of the end of the first circuit (moment / g) the voltage at the output of converter 4 is proportional to the duration of the first opening, the voltage at the output of converter 5 is proportional to the duration of the first circuit, and the voltage at the output of adder 10 is proportional to the total duration of the opening and circuit. At this moment, the control unit analyzes the output voltages of the comparison units of 8 and 9 n amplitude selectors 11 and 12 (finding the amplitude response

selectors 11 and 12 are equal to the values corresponding to the limit-permissible closure and opening time (for example, for the selector 10-90 ms, for the selector 12 - ON and ms).

Obviously, for a dialer whose parameters meet the established standards, at the time of the end of the first closure (moment / h)

the output of the converter 5 must be greater than the output voltage of the divider 6 (lower norm of the pulse coefficient) and lower than the output voltage of the divider 7 (upper norm of the pulse coefficient), and the voltage at the output of the adder 10 must be greater than the threshold of amplitude selector 11 (lower norm total duration) and less than the trigger threshold of the amplitude selector 12 (upper norm of the total duration). In accordance with the best available at the outputs of the comparison blocks 8 and 9 and amplitude selectors 11 and 12, the control unit includes those or

other indicators 13-16 (“Rate of Immune Ratio,“ Duration, “Fault”).

At the end of the analysis, control unit 2 generates a reset pulse (moment

3), which zero converters 4.5. From the beginning of the next opening, the process is repeated. If it is necessary to select other front-acceptable values of the pulse coefficient and the total duration of the opening and closing, it is enough to change the division ratio of the dividers 6 and 7 and the response thresholds of the amplitude

selectors 11 n 12.

Claims (1)

Invention Formula A device for remotely checking the parameters of telephone dialers, comprising a serially connected input converter, a control unit and an input counter, characterized in that, in order to increase the reliability of the test, time interval-voltage converters, voltage dividers, comparison blocks, adder, amplitude selectors and indicators, while the outputs of the input converter are connected to the first inputs of the first and second converters, the time interval is voltage the second inputs of which are connected to another output of the control unit, the output of the first The 1g-time-voltage converter is connected to the first input of the adder and to the inputs of dividers, the outputs of which through the corresponding comparison blocks are connected to other inputs of the control unit connected to the indicators, and the output of the second time-voltage-converter is connected to other inputs of the comparison blocks and the second input of the adder, the output of which through the amplitude selectors is connected to the additional inputs of the control unit connected to the output of the counter of input bursts. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 253157, cl. And 04M 3/00, 1968. but Kj . S) z A S yy / k is iO at) l I I I I. I 11., 1., tj ts s-7; 3 3 tit .l: sij tsstis n n a: y ) A L A A A A A L L