SU773566A1 - High-accurancy time signal selector - Google Patents

Description

The invention relates to electric watch installations for stand-alone devices and electric watch systems. Known selector signal test time containing the detector, filter, two elements And connected in parallel with the filter and in series with each other and with the detector adder and pulse counter. The signal from the filter is compared first with the input signal and then with the signal detected after the first comparison. L3 The disadvantage of such a selector lies in its low reliability due to the lack of means for analyzing the duration of the signals and the period of their follow-up. The closest to the invention to the technical essence is the selector of time verification signals containing a detector, a pulse counter first and second And elements connected to the detector output, a third And element connected to the detector output and an output of the pulse counter and the fourth And element However, the accuracy of the selection of the exact time signal (the leading edge of the sixth pulse) by this device is insufficient, resulting in an inaccurate reference to the time scale, due to the discrepancy in time of the instrument correction time Yeni with the scale of the state of the service. This is explained by the error in the study of the pause duration. The aim of the invention is to improve the accuracy of the selection of time verification signals. The goal is achieved by the fact that a selector, a pulse counter, the first and second And elements connected to the detector output, the third And element connected to the detector output and the output of the pulse counter, and the fourth And element are entered into the selector of the time test signals, the pulse generator imitating a full time signal, two inverters, a delay element and a trigger, with the output of the pulse generator connected to the input of the first inverter and the second input of the second element And, the output of the first inverter is connected to and The information input of the pulse counter and to the second input of the first element I, the first input of which is connected through the second inverter to the detector output, the outputs of the first and second elements I are connected to the corresponding inputs of the fourth element K, the output of which is connected through the element of the delay T, to the first input of the trigger, the second input of which is connected to the detector output, and the output to the inputs of the zero setting of the pulse generator and the pulse counter.

The drawing shows a structural diagram of the proposed selector.

The device contains a detector 1, the second inverter 2, the first l second elements 3 and 4 And, the generator 5 pulses, the first inverter 6, the third element 7 And, the counter 8 pulses, the fourth element 9 And, the delay element 10, the trigger 11. The input terminal is connected with the input of the detector 1, the output of which is connected through the inverter 2 to the first input of the first element 3 AND directly to the first input of the second element 4 AND, the second input of the trigger 11 and the first input of the third element 7 AND, the outputs of the first and second elements 3 and 4 AND .neny with the inputs of the fourth element 9 And the output of the fourth element 9 And through the delay element 10 is connected to the first input of the trigger 11, the output of the trigger 11 is connected to the inputs of setting the zero generator 5 pulses and the counter 8 pulses, the output of the generator 5 pulses connected to the second input of the second element 4 And through the first inverter 6 with the second input of the first element 3 And and the information input of the pulse counter 8, the output of the pulse counter B is connected to the second input of the third element 7 And, the information input of the pulse generator 5 is the input signal of the reference frequency, you od third element 7 and is output selector checking the time signals.

The time selector signal selector works as follows.

When entering on. the input of the detector 1 time verification signal (six points of the audio signal) at the detector output a video pulse is generated, the leading edge of which trigger 11 is set to such a state that the pulse generator 5 begins to generate a signal, simulates a time test signal (six rectangular video pulses of duration 0.1 s and a period of 1 s).

Since the inverted and direct signals from detector 1 and generator 5 arrive at the inputs of elements 3 and 4, respectively, the output of element 9 I appears and a signal confirming the state of the trigger 11, i.e. allowing video generator to continue forming by generator 5, if the signal duration at the input of detector 1 coincides with the duration of the reference signal of generator 5. If the falling edges of the pulses from detector 1 and generator 5 do not match, and this time difference is greater than the delay time of element 10, then trigger 11 tilts, which leads to resetting the counter 8 and bringing the generator 5 to the initial state. If the rising edges of the pulses from the detector 1 and the generator 5 do not coincide in time, less than the delay time of element 10, the trigger 11 will remain in the same state and the falling edge

5, the video impulse generator 5 records the single information in the counter 3 pulses. At the pause stage between two consecutive pulses, the inputs of elements 3 and 4 come from detector 1 and generator 5 pulses that are shifted in phase by 90 relative to the previously received pulses. Therefore, at the output of element 9 I, the old signal remains

Since trigger 11 does not change its state, previously recorded information is stored in counter 8.

The specified sequence of analysis — the duration of the pulses and pauses repeats before recording in the counter 8 of the last (aiecToro) pulse, which, by overflowing the counter memory, causes the output of element 7 AND of the correction signal, provided that another input of element 7 And simultaneously detector 1 receives a pulse, the leading edge of which corresponds to the exact time.

Claims (2)

1. Accepted for Japan 44-19627, cl. 109 B 5. 2. Time check signal selector. Proceedings of the Institute, 1975, issue 18, p. 37 (prototype). Efrf 1sh m