SU720791A1 - Device for checking time parameters of dialing system - Google Patents

Description

-I; -.

The invention relates to communication technology and can be used to control the impulse coefficient of a contactee and the speed of rotation of a dial of a dialer of a calling device of a telegraph end point.

A device for controlling the time parameters of a dialer is known, comprising a control unit, an opening time counter and three AND elements, the first input of which is connected to the output of the closing time counter 1.

However, the known device does not provide a sufficient degree of control.

Pel invention - increasing the accuracy of control.

To achieve this goal, the device for controlling the time parameters of the dialer, containing the control unit, the opening time counter and the three I elements, the first input of which is connected to the output of the close time counter, the first and second outputs, the trigger and the period duration counter, when this is the first input of the first element AND connected with the first input of the second element and the second input of which is connected to the first input of the third element AND, the second input of the first element AND and the clock output of the control unit, the output of the circuit is connected to the third input of the first element And to the input of the first divider and to the input of the second divider, the output of which through a trigger is connected to the second input of the third element And, the third input of which is connected to the fourth input of the first element And, the output of the first divider and the third input The second element is And, the fourth input of which is connected to the trip output of the control unit, the control input of which is connected to the output of the period duration counter, the input of which is connected to the output of the third element And and the output of the trip time counter, the input of which is connected to the output of the second element I, and the output of the first element I connected to the input of the time counter closure.

Claims (1)

The drawing shows a structural electrical circuit of the proposed device. The proposed device contains a control unit 1, a counter 2 of the opening time, elements AND 3, 4, 5, dividers 6, 7, respectively, ten and twelve, trigger 8, period 9 counter, dialer 10, closure time 11. The proposed device works as follows. The pulses from the contacts of the dialer 10 enter the block 1, which forms the fronts of these pulses and separates the closure and open pulses into two outputs. One of these outputs is connected to the second input of an AND 3 element, and the second to the second input of an AND 4 element. The first inputs of all three IZ, 4, 5 elements through block 1 receive pulses from a clock generator (not shown). At the moment that the first pulse of the pulsing contacts opens from the dialer 10, counter 2 is allowed to work through the element 4. The pulses from the clock pulse generator arrive at counter 2, and their number is equal to the duration of the first opening time of the contacts of the dialer 10, taking into account their frequency, this is remembered counter. The length of time of the first contact closure, -subsequent to the opening, is counted and recorded by a counter 11 through the IZ element. After the closure of the contacts has been completed, the number of pulses of the generator counted on the counter 2 is added to the number of pulses, which is received during the second disconnection of the dialer 10 contacts. A similar addition will occur on the counter 11 during the second contact closure. At this time, dividers 6 and 7 count the number of moments of the transition of the pulse front of the IP dialer from the closing state to the contact opening state. So, when the first contact is opened, these counters are counted by one, after the end of the first circuit and the appearance of the second circuit, they will fix the number Two, 3aTiEf, M after the second circuit is completed, the number three, etc. This count will continue until the divisor b will not fix the number ten. This moment corresponds to the arrival of nine periods of disconnection of the device by the impulse contacts of the dialer 10. by removing the resolution from the third input of the AND 3, 4, 5 elements. Due to this, the duration of the tenth disconnection of the impulse contacts when dialing 10 digits O on the dialer, which always turns on during such checks, and the inter-run time is not taken into account when re-dialing the O number. Subsequent to this, the first opening of the contacts brings the divider 6 to the initial state, thereby permitting measurement. On the divider 7, the eleventh transition is fixed and the counter 9 continues to count the length of the tenth period. When this period ends, the divider 7 marks the arrival of twelve transitions, which corresponds to ten periods of pulses of the dialer 10. Trigger 8 is triggered and prohibits further operation of counter 9 at the second input of element 5 and 5. displayed on the indicator board. The operation of the counters 2, 11 is continued until the counter 11 records the number of pulses from the generator, a multiple of 10, where n is an integer number, depending on the required measurement accuracy. During this counting, the dividers 6, 7 work in a similar way with the difference that the work of the divider 7 no longer affects the result obtained, since the trigger 8, having triggered, continues to remain in its working state. Fixing the number of pulses equal to 10, the counter 11 prohibits further input of the pulses from the generator and information about the magnitude of the pulse coefficient of the dialer 10 through the control inputs from the counter 2 to the block 1. The indicator displays the quantitative value of this information. The invention allows to provide a quantitative assessment of the dialer parameters and, after checking, indicates the value of these parameters, regardless of whether they are normal or not. There is no need to select predetermined limits of the parameter tolerances and, thus, expand the measurement range of the values of these parameters. An apparatus for monitoring the time parameters of a dialer comprising a control unit, an opening time counter and three elements AND, the first input of the first of which is connected to the output of the closing time counter, characterized in that, in order to improve the control accuracy, the first and second dividers are entered, a trigger and a period duration counter, wherein the first input of the first element AND is combined with the first input of the second element AND, the second input of which is connected to the first input of the third element AND, the second input The first element And the clock output of the control unit, the output of which is connected to the third input of the first element, to the input of the first divider and to the input of the second divider, the output of which through a trigger is connected to the second input of the third element And, the third input is connected to the fourth input of the first element I, the output of the first divider and the third input of the second element I, the fourth input of which is connected to the trip output of the control unit, the control input which is connected to the output of the period duration counter, the input of which is connected to the output of the third And element and to the output of the opening time counter, the input of which is connected to the output of the second And element, and the output of the first And element connected to the input of the closing time counter. Sources of information taken into account in the examination of the USSR Author's Certificate of the USSR No. 557511, cl. H 04 M 3/22, 1975 (prototype).