SU650029A1 - Device for location communication line faolure location - Google Patents

Description

one

The invention relates to radio engineering;: can be used in an electrical circuit.

lisBECTHO device for determining the distance to the damage location of the communication linkage, Contains a quartz task of the i-e detector, the output of which is connected to the inputs of two frequency dividers, the first inputs of the sawtooth generator and the element NO. Zy.hod which is connected to the logical input of the logical node, the geyrator of clock pulses, the output of which is connected to the input of the geyrator of the probe, their imiu.p.-sov, correction unit, the output of which is connected to the first inputs of the two amplifiers, while the output of the second divider the frequencies are connected by the second input of the second generator ai; a form voltage, the output of which is connected to the first contact of the first switch, the second contact of which is connected to the output of the first sawtooth voltage generator and a horizontal plate of the elec tri-ray tube, and in; one of the first amplifier through 1Gx1 | block by;: .KEYS to the SECOND - NULL PICT; G: -l 1.

However, the known hstronothio is not o6cc, iv is sufficiently accurate and .means.

9

The purpose of the invention is to improve accuracy. To do this, the device for determining the distance to the place of damage to the communication line contains a Quarter master oscillator, the output of which is connected to the inputs of two frequency dividers and the first input; uiM of the sawtooth voltage generator and the element NO, whose output connects to the first input of the logical node,

clock generator gp1 pulses, the output of which is under; It is located at the inputs of the geyrator of zoidiruiluyi pulses, the correction unit, which is connected to the inputs of the sealer 11, while the output of the second controller is connected to the second input of the second sawtooth generator, the output of which is connected by the first contact of the first switch, the second contact of which is connected to the output of the first generator: a sawtooth voltage and a horizontal plate of the electron-beam of the tube, and the output of the first xilmtel through a matching unit is connected to the inopoMv input of the second power coupler,

Pnsdepy b.; ok nychitap ;, key, unit of measurement; remenp:., second generator of UHPs HMi; y.ibcO i, recalculated unit, b,; ok selection of delay l. hsmeigue delays, of which the second) n

the third inputs of the NO element and the logic node, the output of which is connected to the control input of the key, the signal input of which is connected to the output of the second amplifier, and the output of the key is connected to the vertical cathode ray tube base, and the outputs of the probe impulses are connected to the inputs of the subtractor, and the outputs of the first frequency divider are connected to the inputs of the delay element via the delay selector; the second input of the first sawtooth voltage generator is connected to the corresponding output of the nerve frequency divisor and the input clock pulse generator, whose output is connected to the input of the second sounding pulse generator and the inputs of the delay time measurement and correction unit coupled to a corresponding output of the delay element, the output of the subtraction unit is connected to the second input of the first amplifier.

The drawing shows a structural electrical circuit of a pre-expanded device.

The device for determining the distance to the link fault site contains a quartz oscillator generator 1, the output of which is connected to the inputs of two frequency dividers 2 and 3 and the first inputs of the generators 4 and 5 of the sawtooth voltage and the NO element 6, the output of which is connected to the first logic input node 7, generator 8 clock pulses, the output of which is connected to the input of the nerve generator 9 probing pulses, correction unit 10, the output of which is connected to the first inputs of two amplifiers And 12, while the output of the second frequency divider 3 Connected to the second input of the second generator 5 sawtooth voltage, the output of which is connected to the first contact of the first switch 13, the second contact of which is connected to the output of the first generator 4 of the sawtooth voltage and the horizontal plate of the cathode ray tube 14, the second switch 15, the output of the first amplifier 11 through the matching unit 16 is connected to the second input of the second amplifier 12, subtracting unit 17, key 18, delay time measuring unit 19, second probe pulse generator 20, counting unit 21, unit 22 you delay bursts and delay elements 23, the outputs of which are connected to the second and third inputs of the element NO 6 and logic node 7, the output of which is connected to the control input of the switch 18, the signal input of which is connected to the output of the second amplifier 12, and the output of the switch 18 is connected to the vertical plate of the cathode-ray tube 14, and the outputs of the subtraction unit 17 are connected to the outputs of the generators 9, 20 probe pulses, and the outputs of the first frequency divider 2 Hepto delay selection block 22 are connected to the inputs of the delay element 23, while the second input ne The generator 4 of the sawtooth voltage is connected to the corresponding output of the first frequency divider 2 and the generator input 8 clock pulses, the output of which is connected to the input of the second generator 20 probe pulses, and the inputs of the delay time measurement unit 19 and the correction unit 10 are connected to the corresponding output of the delay element 23 The output of the subtractor 17 is connected to the second input of the first amplifier 11.

The device works as follows.

The quartz master oscillator 1 generates a stable pulse sequence, which enters the input of the first frequency divider 2. The sounding is performed by the front of two-pole pulses and their duration is chosen to be greater than or equal to twice the propagation time of the electromagnetic energy over the wire line under study. Therefore, the frequency divider 2, the generator 8 provide a predetermined pulse duration at the outputs of the first 9 and second 20 generators of probe pulses.

The wired line through the second switch 15 receives the probe pulses of the first generator 9, are reflected from the heterogeneity and are fed to one of the inputs of the block 17, where the sum of the pulses of the first generator 9 n reflected pulses is generated. The second input of the subtracting unit 17 receives the pulses of the second generator 20. As a result of the subtraction, the output of the unit 17 will contain only reflected pulses that are amplified in the first amplifier 11. Thus, the transmitting and receiving paths are separated without using a bridge circuit.

To eliminate the remainder of the probe pulses after amplification, a matching unit 16 is turned on. Subsequently, the reflected pulses are amplified in amplifier 12. A correction is provided in both amplifiers, which is performed by means of a correction unit 10.

After the amplifier 12, a switch 18 is installed, the purpose of which is to transmit only the pulses reflected from the inhomogeneity to the input of the cathode-ray tube 14. The sweep of the beam is performed using the generator 4.

The device has the ability to view the actual picture of the reflected pulses. To do this, with the help of a switch 13 to the horizontal) BUT, the deflector plates connect the generator 5, the speed of which is several times less than the sweep speed of the generator 4, as the frequency divider 3 is at the input.

The key 18 is controlled by block 22, delay element 23, logical node 7, and element NO 6. The key must open at the moment the reflected momentum begins and close at the moment it ends. The logical node and the element NO 6 are used to stabilize the operation of the key 18.

Information about the time of the arrival of the reflected pulse at the input of the device is laid at the moment of the appearance of the first pulse of the delay element 23, since it coincides with the beginning of the reflected pulse. Therefore, a block 19 and an uncountable block 21 are connected to the first output of the delay element 23, which produces a delay time for the speed of propagation of electromagnetic energy along the wire line.

The result obtained, previously divided by two (as the pulse travels the distance to the heterogeneity and back), is displayed on the digital indicator of the scaler 21.

Claims (1)

Invention Formula A device for determining the distance to the fault line, containing a quartz master oscillator, the output of which is connected to the inputs of two frequency dividers and the nerve inputs of the sawtooth generator and the NO element, the output of which is connected to the first input of the logical node, clock generator, output which is connected to the input of the first probe pulse generator, the correction unit, the output of which is connected to the first inputs of two amplifiers, while the output of the second frequency divider is connected to the second the input of the second sawtooth generator, the output of which is connected to the first contact The first switch, the second contact of which is connected to the output of the sawtooth voltage nerve generator and the horizontal plate of the cathode ray tube, and the output of the first amplifier is connected to the second input of the second amplifier through a matching unit, characterized in that, in order to increase the accuracy, a block is inserted into it vychptapp, key, unit of measurementEn time delay, the second probe pulse generator, perepechy block, block selection delay and the delay element, the outputs of which are half-connected to the second and third inputs of the el There is NO NO logical gate, the output of which is connected to the control input of the key, the signal input of which is connected to the output of the second controller, and the output of the key is connected to the vertical plate of the cathode ray tube, and the outputs of the heaters of the probing imiuluses are connected to the inputs of the first the frequency divider is connected via the delay selector unit to the inputs of the delay element, while the second input of the first sawtooth voltage generator is connected to the corresponding output of the first frequency divider and in the clock pulse, the output of which is connected to the input of the second probe pulse generator, and the inputs of the delay time measurement unit and the correction unit are connected to the corresponding output of the delay element, and the output of the subtraction unit is connected to the second input of the first amplifier. Nostoch 1pki information taken into account during the examination 1. Germany Nent. 1219585, cl. 21e 29/10, publ. 1966.