SU530308A1 - Device for detecting time calibration signals - Google Patents

Description

You will reinvent it to the instrument-making device and it is used in correction devices for hours, for measuring the time of propagation of a cable, for monitoring the passage of a radio signal,

Devices are known for detecting iji calibration signals containing a receiver, a tunable clock with a comparator to a time interval meter.

Also known are devices for signaling calibration signals 2, comprising a receiver, a detector, switched on at its output, a key AND, a key OR, a pulse counter.

A disadvantage of the known devices is low noise immunity when detecting signals.

The circuit of the invention is an increase in the noise immunity of the device when detecting signals from the pk signal.

The goal is achieved by the fact that the device is equipped with a digital pulse analyzer and a time relay. A single input of the digital pulse analyzer is connected to the output of the receiver, the second input to the output of the first time relay, the second input of which

ha is connected to the outlet tsettektr. and with perg-th B-onf v key. Outputs ttsy rois:; - o ai ---. rijr-; 3avopa .tcoE are connected to the pulse counter and to the first input of the OR key, the second input of which is connected to the output of the second time delay. V. / key move OR connect ;, with the input of the mid-G: a,; key input And - with the release of g lgetchnka, & the output of the key M is connected to the input of the second relay BpsMoiiK i; with device output,

The drawing shows a functional diagram of the proposed device.

Claims (2)

By offering (a device for detecting signaling signals Ej e; ftrai contains 1, the output of which is connected to the first input of a digital analyzer 2, a relay of time 3, an output of 1: O: -o connected to the input of the digital analyzer 2. detector 4, the output output, the fflJJa 1, the 4th detector is connected to the turnout 3, and the key input is AND 5, the counter 6, the first window to the output TU {hi: o: eoro anajuisaTOpa 2, and the second t-yiOR switch .. a;:. is engaged with the output of the key OR 7, -: o-. j is connected to the output of the digital analog signal 2. The output of counter 6 is connected to the second input of the key AND 5, turnips of times 8, the output of which is connected to the input of the ITS 7 key, and the input is connected to the output of the key AND 5. The time detection signaling device works as follows: From the receiver 1 output, the time calibration signal in the form of a radio pulse pulse is fed to the 1SCH2 analyzer 2 input, using which recognizes time calibration signals. Digital analyzer 2 has two outputs, the first of which outputs a signal when its capacity is filled per l pulses, and the second one - on P + m pulses (p. the minimum number of periods of the normalized time calibration signal; n + t is the maximum number of periods of the normalized time calibration signal). The time calibration signal consists of these radio pulses with a repetition period equal to 1 sec and d, 1 pulse width of 0.1 sec, filling frequency is 1000 Hz. Each of the six radio pulse pulses contains 100 pulses. For reliable reception, it is necessary that p 100. When received from the output of receiver 1 of the first three radio pulses, a signal appears at the output of digital analyzer 2, which is recorded by the counter 6 behind. At the same time, from the output of detector 4, a pulse of a constant current is fed to the input time relay 3, which .. serves to return the digital ana to-. congestion 2 to its original state. If all six pulses meet the above conditions, then the sixth pulse through the key AND 5 post goes to the common output, since the key AND 5 opens from the fifth pulse recorded by the counter 6, and the output of the counter 6 is an impulse The current J / stan of the counting device 6 is zeroed by time relay 8. In the event that the incoming signal does not match the parameters of the standard signals from the device output, the exact time pulse does not arrive because the And 5 key is closed. For example, if the number of pulses in a single radio and gaulse is higher than n + tl, then from the second output of the digital analyzer 2, the OR 7 key is applied to the second input of counter 6, which impulses its pulse to zero. If the number of pulses in 0.1 sec is less than P, the digital analyzer 2 returns to the initial state with the help of time relay 3. Formula of the invention A device for detecting time calibration signals containing a sampler, a detector switched on at its output, a switch And, the key OR, a pulse counter, characterized by that, in order to increase the noise immunity of detecting time verification signals, it is equipped with a digital pulse analyzer and in time, the input of the digital pulse analyzer is connected to the output-- the receiver. If the output of the first time ruler is connected to the detector output and to the first key input AND, the digital pulse analyzer outputs are connected to the pulse counter input and to the first input of OR, the second input of which is connected to the output of the second time relay, key output OR is connected to the input of the counter, the second input of the AND key is connected to the output of the counter, and the output of the AND key is connected to the input of the second time relay and to the output of the device. Sources of information taken into account in the examination of the application: 1. Apparatuses for frequency and liblix measurements, psd ed. Gorshkova A.P. Ow. radio, 1971, p. 228. 2. Japanese Patent No. 19627, cl. 10985, 02.03.69 (prototype).