SU473154A1 - Device for automatic time stamping - Google Patents

Description

one

The invention relates to devices for automatically assigning time scales to reception points of the time service by reference time signals transmitted by radio stations of pulse-phase radio navigation systems simultaneously with the transmission of navigation signals.

A device for automatic assignment of time scales, containing a reference oscillator, time saver, an automatic receiver indicator, an epoch control device, consisting of a recurrent frequency divider synchronized with a reference generator, a preset counter for selecting a clock pulse, determined by tables, a digital counter, is known. delays to form the delay of the pulses of the recurrent divider tied to the received navigation signals, taking into account the amount of propagation time Yeni radio transmitting station on the highway - collection point.

The disadvantages of the known device are the impossibility of ensuring the automatic installation of the time store using a recurrent frequency divider and ensuring the continuity of measurements and the input of measurement results into the computing device.

In order to eliminate these drawbacks, the proposed device for automatic anchoring of the time chords is equipped with a feedback pulse shaper, a trigger, an AND circuit and an electronic key. One of the outputs of the recurrent frequency divider is connected to the input of the feedback driver and, via a serially connected digital delay counter and electronic key, to the time interval meter and to the time store input, the output of which is connected to the second time meter input. The second input is connected to the second output of the recurrent frequency divider, the third output of which is connected to the second input of the feedback driver. The output of the latter is connected to the input of the recurrent divider, and the third input is connected to the second input of the electronic key and the output of the trigger, the first input of which is connected to the output of the automatic receiving-indicator and the second input of the electronic key. The second input of the trigger through the circuit “And is connected to the second output of the time storage, while the second output of the automatic receiver indicator is connected to the second input of the circuit“ I.

The drawing shows a block diagram of a device consisting of a recurrent frequency divider 1, synchronized by a reference generator 2 through time keeper 7 and having a control circuit from an automatic receiving indicator 3 and a feedback pulse generator 4, whose inputs are connected to the output of a recurrent frequency divider I and the intermediate bit of the same divider, and the control is exercised by the trigger 5, circuit "AND 6, connected to the second output of the receiver-indicator 3 and to the output of the time store 7, the digital delay counter 8, the input otorrhea connected to the output of the recurrence of the divider 1 and the output from the electronic key input meter 9 and slots 10.

The device works as follows.

Using the automatic receiver 3, using the command "start of the search, it searches and links to the navigation signals, controls the recurrent divider 1 so that the output signals of the divider coincide with the first impulses of the radio navigation signal packets.

By the same command, a signal from the output of the receiver-indicator 3, via trigger 5, turns on the driver of feedback pulses 4 and turns off the electronic switch 9.

The feedback pulse shaper 4 receives pulses from the output of the recurrent frequency divider 1 and from the intermediate bit of the same divider representing the shift register.

The intermediate bit of the recurrent frequency divider I is selected in accordance with the number of the operating recurrent frequency of the navigation signals, while part of the feedback pulses is eliminated, forming at the output of the divider 1 pulses following the recurrent-frequency.

After finishing the search for navigation signals, a command impulse is generated at the output of receiver 3 to prepare an & 6 pattern.

Using the tables of the Marine Observatory, the closest instant of coincidence of the second time store 7 with the 1st impulse of the navigation signal packet is detected and the corresponding time is accumulated on the clock of the time store 7.

The selected time impulse of the time saver 7 is passed through the prepared circuit “AND 6 to the trigger 5 and turns off the feedback pulse shaper 4 and turns on the electronic key 9.

Thus, the recurrent frequency divider 1 at the time of arrival of the pulse from the time store 7 becomes the divider

the frequencies at the output of which labels are formed are standard buttons and the phase of which corresponds to the temporal position of the recurrent navigation signals at time 5, as determined from the tables.

Pulses from the output of frequency divider 1 are fed to the input of a digital delay counter 8, where they are delayed by an amount characterizing the propagation time of radio signals on the path of the transmitting station - receiving point 4 (Gzad. 7vig.- dist., GDe Gda.-

delay value, dialed on the digital delay counter 8, Gnavig. - the period following navigation signals, / dist. - propagation time), and through the switched on electronic key 9, enter the time interval meter 10 and the automatic installation of the time store 7 with a frequency equal to, for example, the fundamental frequency of the track navigation signals.

Subject invention

A device for automatic binding, a time loop containing a reference oscillator, an automatic receiver indicator, a time keeper, a digital delay counter, a recurrent frequency divider and a time slot keeper, characterized in that, in order to extend the functionality, it is provided with a feedback pulse driver, a trigger And with an electronic key, one of the outputs of the recurrent frequency divider is connected to the input of the feedback null driver and Digital delay counter and electronic key to the time meter and to the input of the time store, the output of which is connected to the second

0 input of the time interval meter, and the second input - with the second output of the recurrent frequency divider, the third output of which is connected to the second input of the feedback pulse generator, the output of the last

5 is connected to the input of the recurrent divider, and the third input is connected to the second input of the electronic key and the trigger output, the first input of which is connected to the output of the automatic receiving indicator and the second input / to the electronic key, and the second input of the trigger is connected to the the second output of the time storage, while the second output of the automatic receiver-indicator is connected to the second input of the “I.