SU1242879A1 - Device for reception of time signals - Google Patents

Abstract

This invention relates to seismic exploration. Time of reception of signals of time is reduced and reliability increases. The device contains a receiver 1, filter 2, detector 3, shaper 4 demodulated signal, three installation trigger 5, 6 and 7, gene-p 8 stable frequency, frequency divider 9, two keys 10 and 11, reversible counter 12, block 13 the driver and the output driver 14. In order to achieve the goal, a control unit 15, a control unit 16, an OR element 17, a coincidence element 18, two switches 19 and 20 and an adder 21 are inserted into the device, which ensure the operability of the device in the absence of pulses in the receiving code message. 1 il. (L S o 00

Description

The invention relates to the field of seismic prospecting and is intended to receive a command for the initiation of seismic vibrations and measurement information (OM and HE signals), as well as to synchronize a radio channel.

The purpose of the invention is to reduce the time of reception of time signals and increase reliability by ensuring operability in the absence of pulses in the receiving code message.

The drawing shows the electrical structure of the device for receiving time signals.

The device contains a receiver 1, filter 2, detector 3, shaper 4 demodulated signal, first, second and third installation triggers 5, 6 and 7, stable frequency generator 8, frequency divider 9, first and second keys 10 and 11, reversible counter 12j block 13 delays, an output driver 14, a control unit 15, a control unit 16, an OR element 17, a coincidence element 18, first and second switches 19 and 20, an adder 21.

The device works as follows.

When the power supply is turned on, the unit 15 impulses a pulse that is applied to the reset reset of the reversible counter 12, the adder 21 and the control unit 16 and to one of the inputs of the installation triggers 5, 6 and 7. When I do this, the receive channel is reset to its original state.

A code pulse of radio pulses arrives at the receiver input, consisting of (and a signal OB, which, having passed through filter 2, the detector 3 and shaper 4, enters one of the inputs of the coincidence element 18 and into the control unit 16.

On the front of the front of the first pulse of the codeblock received in control unit 16, the latter throws the setting triggers 5 H 6 and generates its own sequence of pulses, which is fed to one of the inputs of the coincidence element 18. This sequence is a copy of the code side expected from the receiving side and serves to permit the passage of the second and subsequent code burst pulses through the match element 18. And

five

Q

the duration of each of the pulses of the sequence produced by the control unit 16 is selected taking into account the maximum possible spread

the reception times of the code sequence pulses. The resolving potential at the third input of element 1B of coincidence comes from the output of the set-up trigger 5 when it is thrown.

0 The control unit 16, in addition, selects according to the duration of the first impulse arriving at its input, which, if it matches the specified parameters, indicates

5 the beginning of the code parcel. If this correspondence is not observed, one of the outputs of the control unit 16 receives a signal in the control unit 15, which is an output pulse connected to the installation trigger 5, 6 and 7 by a reversing counter 12 and the adder 21, and returns the device to its initial state .

5 In the event that the first pulse of the device code recognition is recognized, the device continues operation. The flip-flop setup trigger 5 opens the key 10, through which pulses from

0 generator 8 through the divider 9, the frequencies arrive at a frequency / To the summing input of the reversible counter 12. The second pulse of the code input to the input of the element 18 coincides with the element OR 17 through the switch 19 briefly switches the outputs of the reverse switch - chip 12 with the inputs of the Adder 21. In this case, the adder 21 is recorded by the frequency recorded by the frequency between the first and second pulses of the code row allocated on the receiving side; T + + Ai - db, where T is the period of the pulse of the code row; , is the radio transmission error of the first pulse of the code sequence. At the moment of receiving the third pulse of the code set, the time between the first and third pulses of the code set: T + Aii-1 is applied in the same way to the inputs of the adder 21, resulting in the sum recorded in the adder 21. ZT-f. Similarly, the device performs everything.

q pulses of the code sequence, with the result that after the arrival of the nth pulse in the adder 21, the sum T-k (k-0/4 - (- L-L-SI-} A-b

five

31242879

The pulses of code dressing from the output of element 18, coinciding with the arrival at the input of element OR 17, are fed to the input of control unit 16, where they are counted. After 5 arrivals of the code positon pulse in block 16 from its other output, a signal arrives in control block 15. In this case, three pulses alternately appear on the three outputs of control unit 15. The first of them transfers the setup trigger 5, which closes the key 10, to the initial state (prohibit the frequency -f / n to the summing 5 input of the reversible counter 12, the second, the input to the control input of the switch 20, converts from the adder 21 to the reversible counter 12 the sum of the reception times of the second and subsequent 20 mp pulses of the codecount relative to the first, the third one - wrapped the sum of the matrix 21.

Simultaneously with the flip-flop of the flip-flop 5 from the pulse 25 from the output of the control unit 16, the flip-flop trigger 6 is flung, which triggers the delay unit 13. last pulse pulses of strictly fixed duration f, jq

(n - l) A + iAtl - (:: nH) uii, rear

t ()

.. ("M) .t. / V

after entering on words, giving the moment known with

the reset of which resets the installation trigger 6 to the initial state 35 starts the installation trigger, which coordinates the passage of the pulses through the key 11 .. At the same time, the pulses from the generator 8 through the frequency divide 9 with the frequency f- received- 40 tons to the reverse-reading subtracting input 12, reading the time recorded in it.

Since the time was written using the frequency -f / n, and the reading was made with frequency, the reversible counter 12

In the case of a code plug-in device from the output of the electric inputs of the control element, the fifth corresponding pulse, the element OR will be sent in block 16 to this block of pulses, the work is broken in that code pulse

. Proposes synchronization on the transmitting radio channel to the side of the impulse device f) after

. i-i

sync transmitter position.

time zero

ytn-i) U + L.utL / n

- (n-) uti / f7. When resetting the reversible counter 12, an impulse appears at its output, which resets the installation trigger 7, which closes the key 11, and enters the input of the driver 14. Thus, the driver 14 gains an impulse time

wickedness

t () T (p-1) / g + G D iu / M .. (“M) .t.,

wickedness

after the appearance of the information signal at the output of the launcher. In other words, a moment-time radio transmission was carried out with a fixed known shift (V2 and ±

m

and

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In the event that any impulse of the code dressing is not exceeded by the receiving equipment, i.e. will not arrive from the output of the element 18 coincidence at the inputs of the RSHI element 17 and the control unit 16, the latter, on the falling front of the corresponding pulse of its own sequence, generates a pulse arriving at another input of the OR element 17, and the operation of the device. va will continue. The pulse formed in block 16 of control is taken into account by this block when counting the number of pulses of the code parcel. Thus, the operation of the device will not be disrupted if one or several pulses are missing in the received code dressing.

. The proposed device synchronizes other devices on the transmitting and receiving sides of the radio channel. At the same time, on the receiving side, the pulse from the output of the proposed device in time is 1CG + t (g-1Vg f) after the occurrence of information. i-i

signal at the input of the transmitting channel launch unit sets the synchronization object to the specified position.

Formula

acquisitions

A device for receiving time signals containing a receiver, a filter, a detector and a demodulated signal generator connected in series, a stable frequency generator connected in series, a frequency divider and a first switch, the output of the first setting trigger is connected to the second input of the first switch, output

which is connected to the summing input of the reversible counter, the output of which is connected to the input of the output signal of the output signal and to the first input of the second setting trigger, the output of which is connected to the first input of the second key, the second input of which is connected to the second output of the frequency divider, and the output - to the subtracting input of the reversible counter, the third installation trigger is connected to the input of the delay unit, the output of which is connected to the first input of the third installation trigger and to the second input of the second installation trigger Pa, characterized in that, in order to reduce the time of reception of time signals and increase reliability by ensuring operability — in the absence of pulses in the receiving code message, a control unit and a series-connected control unit, an element of coincidence, an OR element, a per the out switch, the adder and the second switch, with the outputs of the control unit respectively connected

Compiled by O. Konstantinov Editor N. Egorov Tehredm. Khodanich Proofreader L. Patay

Order 3700/44

Circulation 728. Subscription

VNIIGSh of the USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

to the control input of the second switch. torus, to the first input of the control unit, to the control input of the adder, to 5 combined installation inputs of the first, second and third installation triggers, reversible counter and adder, to the first input of the first installation trigger, outputs of the unit

10 control units are respectively connected to the second input of the OR element, to the combined second inputs of the first and third setting trigger and to the corresponding inputs of the control unit, to the second input of the control unit, the output of the coincidence element is connected, the second output of which is combined with the third input of the control unit, and connected to the output of the de-modulated modulator (signal, and the third input of the coincidence element is connected to the output of the first setting trigger, the information outputs of the second switch are connected to the information 2 5 inputs of the reversible counter, the information outputs of which are connected to the information inputs of the first switch.

Claims (1)

• A device for receiving time signals, comprising a receiver, filter, detector and driver of a demodulated signal in series, a stable frequency generator, a frequency divider and a first key connected in series, the output of the first installation trigger is connected to the second input of the first key, the output of which is connected to the summing input of the reversible counter whose output is connected to the input of the output signal shaper and to the first input of the second installation trigger, the output of which is connected to the first input the second key, the second input of which is connected to the second output of the frequency divider, and the output to the subtracting input of the reversible counter, the third installation trigger is connected to the input of the delay unit, the output of which is connected to the first input of the third installation trigger and to the second input of the second installation trigger, characterized in that, in order to reduce the time of reception of time signals and increase reliability by ensuring operability in the absence of pulses in the receiving code package, a control unit is introduced and after ovatelno connected control unit, coincidence element, an OR gate, a first switch, an adder and a second switch, wherein the control unit outputs are respectively connected to the control input of the second switch ·, to the first input of the control unit to the control input of the adder, to 5 to the combined installation inputs of the first, second and third installation triggers, a reverse counter and an adder, to the first input of the first installation trigger, the outputs of the control unit 10 are respectively connected to the second input of the OR element, to the combined second inputs of the first and third installation trigger and to the corresponding inputs of the block control, the output of the coincidence element is connected to the second input of the control unit, the second output of which is combined with the third input of the control unit, and connected to the output of the de20 modulated (signal, and the third input of the coincidence element is connected to the output of the first installation trigger, the information outputs of the second switch are connected to the information inputs of the reverse counter, the information outputs of which are connected to the information inputs of the first switch.