SU548834A1 - Device for measuring the shift of time scales - Google Patents

Description

one

The invention relates to a technique for transmitting time signals over radio channels and can, in particular, be used when installing clocks on fast-moving objects.

To measure the timescale shift, accurate time signals are used, if it does not know the propagation time of the radio waves to the receiver, then double the propagation time of radio waves in the radio channel and the delay of the transmitted radio signal 1 are measured.

It is also known a device for measuring the shift of the time scales of working hours included in a two-way radio channel, containing a receiver, a transmitter, a signal splitter connected to the receiver output, a countdown counter, to the control input of which through a controlled frequency divider, associated with the signal splitter, a clock tiacTOTbi generator is turned on, a recorder connected to the output of the countdown counter, with operating signals connected to the input of the transmitter and to the second input of the counting counter.

A disadvantage of devices of this type is the relatively long time for determining the magnitude of the scale shift,

The aim of the invention is to reduce the time for determining the magnitude of the shift scales.

For this, the input “Start of the countdown counter is connected to the output“ Model clock of the signal splitter.

FIG. 1 shows the proposed scheme

devices; in fig. 2 shows time diagrams, as shown, the operation of the device.

The reference hours for exemplary hours 1 (point A) and working hours 2 (point B) are connected by a two-way radio channel containing receiver 3, transmitter 4 and model hours 1 in point A and transmitter 5, receiver 6, signal splitter 7, a time interval meter containing a clock frequency generator 8 controlled by a divider 9

frequency and counter 10 countdown, and the registrar And in paragraph B.

The output of the model clock 1 is connected to the first input of the transmitter 4, the second input of which is connected to the output of the receiver 3. The output

pulses coinciding with the time scale of clock 2 are connected to the input of the transmitter 5, the output of the pulses corresponding to the end of the cycle is connected to the input “Stop of the counter 10; The output of receiver b is connected to the input of the signal splitter 7, one output of which is connected to the input Start of the counter 10 and the first control input of the frequency divider 9, and the second output of the signal splitter 7 is connected to the second control input of the splitter 9. The output of the counter 10 is connected to the recorder 11. In FIG. 2 accept the following notation:

12- signal of the time scale of working hours;

13- signal of time scale of model hours, delayed by time v relative to impulse 12; 14 - broadcast pulse of the time scale of reference clocks, delayed by the propagation time of radio waves in the radio channel; 15 is a retransmitted signal of the time scale of the working hours, delayed by a double propagation time of radio waves in the radio communication channel 6 relative to the pulse 12; 16 is the pulse of the end of the cycle.

The device works as follows.

A signal of 12 operating hours 2 is fed to the input of transmitter 5 and is radiated. At point A, the received signal of the time scale of the working hours from the output of receiver 3 is fed to the input of transmitter 4 and is re-radiated. The second time the transmitter enters a time scale signal 13 of an exemplary clock and is emitted.

The signals received at point B from the output of receiver B are fed to the input of signal separator 7. From the first output of signal separator, the translated time scale signal of an exemplary clock is fed to the "Start of counter 10" input, where the recording of the cycle value is set and the counting begins for which the signal 14 is also fed to the first control input of frequency divider 9, switching it to the direct pulse frequency transmission mode. From the second output of the signal splitter 7, the retransmitted signal 15 of the time scale of the working hours enters the second control input of frequency divider 9 and switches it to the frequency division by 2. The counter ends with the arrival of the pulse 16 end of the cycle. Counter indications are recorded by registrar 11.

It can be seen from the diagrams that y - 2E - p - Y - e - / J

The value of 8 can be determined through the known value of the cycle T as

T-n

e then

V- - n - 2 2

This formula shows the order of operations to determine the time shift between sample and working hours.

Claims (2)

1. Dudnik B. S. The use of reflected radio waves to calibrate anchor channels timescales. Measuring equipment N ° 6, 1973, pp. 36-39 (prototype). 2. Avt. St. N ° 322758, cl. G 04 C 11/02, 1972. -f o I- 7 crnapffT L .-- J 1I R lUrr: