SU1320108A1 - Device for automatic signalling on train approaching track work site - Google Patents

Abstract

The invention relates to railway technology, in particular, to warning systems that a train is approaching the location of track operations. The purpose of the invention is to increase the reliability of the device. A device for automatically signaling that a train is approaching the track work section contains a receiver 1 installed at the work site, connected by an output to one input of a unit 2 for counting reflected signals, to the other input of which the first output of a sweep unit 3 is connected, the output to one input of a pointing unit 4 the beam to the center of the scanning area, the other input of which is connected to the second output of block 3, one output to the input of matching unit 5, connected by an output to one input of scanning unit 6, another output block and 4 aiming the beam at the center of the scanning area is connected to the input of the block 7 for monitoring the number of reflected signals. The first, second and third outputs of block 7 are connected respectively to the input of block 8 of calculating the train travel time to the section of road work connected to the input of block 9 of the speed indication, the first input of the counter 10 scanning cycles and the input of block 3, the third output of which is connected a second input of the scanning unit 6 connected by an output to the input of the laser generator 11. The fourth output of the unit 3 is connected to the second input of the counter 10, the output connected to the input of the notification unit 12. Reflective elements 13 and 14 are installed in the control zone of approaching the train. 2 Il. SL Ег-7ГГо-с; г до 00

Description

one

The device relates to railway technology, in particular to warning systems that a train is approaching the location of track operations.

The preparation of the device for operation lies in the fact that it is installed near the trackwork area, at a certain distance from it (1.5-2.5 km). The invention aims to increase the reliability of reflecting elements 13 and 14, the device Mounted on the panel of the panel of the square of FIG. 1 shows a block diagram of a device 5. Thereafter, one of the workers of the automatic alarm system detects a coarse visual adjustment to the reflecting elements in a controlled area, for example, using an optical targeting system (not shown). When the power is turned on, the laser oscillator beam 11, controlled by scanning unit 6, starts line-by-line scanning (scanning) over an area of 5 (Fig. 1).

licking the train to the track section; in fig. 2 is a block diagram of device blocks. A device for automatically signaling that a train is approaching the track section contains a receiver 1 installed at the site where the receiver is connected to one input of the unit.

ka 2 counts of reflected signals, to another Laser beam, run across area S, the turn of which is connected to the first output of the sweep unit 3, output to one input of the beam pointing unit 4 to the center of the scanning area, the other input to which is connected to the second output of block 3,

therefore, it is reflected from the triple prism of the reflecting elements 13 and 14. Since the surface of each of the triple prisms is covered by the polarizer, the reflected rays differ due to polarization

one output - with the input of the unit 5 according to 20 each other. The main optical axes of the field, connected by the output to the single-axis triple prism reflecting the elevator of the scanning unit 6, the other outputs 13 and 14 are mutually perpendicular,

block 4 beam pointing to the center of the scan area is connected to the input of block 7

Therefore, the laser beam, consistently reaching the tripleprism reflecting elecontrol the number of reflected signals. Per 25 s 13 and 14 are converted to reflected, second and third outputs of block 7 soy rays polarized in the corresponding planes, which allows to register a certain sequence of their reception. The radiation reflected from the tripleprism is recorded by a pick ‑ 1. In this case

the counter input has 10 scanning cycles and 10 through the objective lens 15 and the optical input of the unit 3, the third output of which the filter 16 reflects the reflected rays to the mirror 17. In this case, the light beam is divided into two different beams. Further, one of the indicated light beams is directly, and the second is through the mirror 18 while 10, the output connected to the input of the unit falls respectively on the polarizers 19 and 12 of the alert. In the zone of control, there are only 20

if the polarization plane coincides with the main optical axis of the polarizer. Thereby, the device selects and signals received from each of the reflectors, namely, each of the photodetectors 21 and 22 receives a signal reflected respectively

the second and third dinenes, respectively, with the input of the unit 8 for calculating the train travel time to the section of track operations connected with the output to the input of the speed indication unit 9, with the first

connected to the second input of the scanning unit 6 connected by the output to the input of the laser generator 11. The fourth output of the unit 3 is connected to the second counting input of the train, reflecting elements 13 and 14 are installed.

Receiver 1 (Fig. 2) contains a lens 15, an optical filter 16, a mirror 17, a mirror 18, polarizers 1.9 and 20, photodetectors 21 and 22, amplifiers 23 and 24. The outputs of amplifiers 23 and 24 form the output of receiver 1.

40

the first and second reflectors. Electrical signals from the photodetector outputs

the first and second reflectors. Electrical signals from the photodetector outputs

The block 2 of the counting of the reflected signals 21 and 22 is amplified, respectively, amplifies elements AND 25-28, the outputs of which are connected to the inputs of the corresponding counters 29-32.

The beam pointing unit 4 at the center of the scan area contains adders 33-36 and comparison elements 37 and 38.

The device works as follows.

Consider the operation of the device in the search mode for reflecting elements when the device is coarsely tuned and when it deviates from the initial position in the retainers 23 and 24. During the scanning process, the beam first reflects from the triple prism of the reflecting element 14. After selecting the reflected beam in the receiver, 50 signal level "1, which arrives at one input of elements And 28 and 27 of block 2 of the account of the reflected signals. The other inputs of these elements And receive electrical signals from the outputs of the trigger block 3 scanner (Fig. 2 trigger is not shown).

due to vibrations or other55 the trigger is switched with a frequency selected by the external factors and in the control mode so that half

the presence of reflected signals and alert-period T, the laser beam

nor about the approach of the train. half of the scan. At that

Preparation of the device for operation consists in the fact that it is installed near the trackwork area, at a certain distance from it (1.5-2.5 km) and is subsequently reflected from the triple-prisms of reflective elements 13 and 14. Since the surface of each of the the triple prism is closed by the polarizer, the reflected rays are different due to polarization

 between themselves. The main optical axes of polarizers, tripleprism, reflecting elelefirst and second reflectors. Electrical signals from the photodetector outputs

21 and 22 are amplified, respectively, and 21 and 22 are amplified, respectively, by amplifiers 23 and 24. During the scanning process, a reflection of the beam from the triple prism of the reflecting element 14 occurs first. After selecting the reflected beam in the receiver, the output signal of the amplifier 24 is 50 one inputs of elements And 28 and 27 of block 2 of the account of the reflected signals. The other inputs of these elements And receive electrical signals from the outputs of the trigger block 3 scanner (Fig. 2 trigger is not shown).

55 Trigger switches with frequency, selected when the laser beam line-by-line runs from top to bottom (Fig. 1) on the upper half of the area S, the electrical signal of level "1 is present at the second inputs of the elements 25 and 26. During the second half period of time T, the beam moves over the lower half of the area S, and the electrical signal of level 1 comes from the sweep unit 3 to the second input of each of the elements 27 and 28. Thus, the periodic formation in the trigger of the unit 3 of the logical unit allows to identify the relative position of the area S, which is used for scanning, and a block of reflecting elements having a triple-peak arrangement of reflecting elements 13 and 14 that are different in height. Signals from elements 25-28 enter the inputs of the corresponding counters 29-32. The counter 29 registers the number of reflected signals received from the reflecting element 13, when scanning over the upper half of the area, and the counter 30 - over the lower half of the area 5. Similarly, the counters 31 and 32 register the pulses received from the reflecting element 14, while scanning respectively the upper or the lower half of the area 5. Recording the reflected signals separately from each triple prism when scanning only at the upper or only at the lower half of the area S allows you to correct the position of the center of the area di relative to the geometric center of the reflecting elements. This function is performed by block 4. In this case, information from counters 29-32 of block 2 for a certain number of scanning cycles L arrives at the input of adders 33-36 of block 4. At the same time, totalizers 33 and 34 calculate the total number of pulses and N2, obtained respectively from triple prism reflective elements 13 and 14. Similarly, adders 35 and 36 calculate the total number of pulses L / V and Mi, obtained as a whole from the triple prism reflective elements 13 and 14 when the laser beam moves respectively along the top or only the lower half of the area S scan.

Information from the outputs of the adders 33 and 34 is fed to the inputs of the comparison elements 37. Here, the number of reflected signals recorded from the triple prism of the reflecting elements 13 and 14 is compared. If the number of reflected signals from the reflecting element 13 (N) is greater than that from the reflecting element 14 (L 2), then in block 4 a control signal is generated

proportional to A ,, which then flows from the comparison element 37 to the input of the matching unit 5. This unit acts on the scanning unit 6 such

Thus, the center of the area S is shifted to the right by an amount directly proportional to AjV. If for N scan cycles in the adder 34 is registered

 the number of reflected signals is greater than N (N2-jVi-0), then a control signal appears at the output of the comparison element 37 arriving at the input of block 5. As a result, the correction unit affects the scanning unit in such a way that the center of area S shifted to the left. Similarly, vertical scanning area correction is performed. In this case, the comparison element 38 compares the total number of reflected signals

5 in the adder 35, when scanning over the upper half of the area 5, and the total number of reflected signals Δ „, obtained by scanning over the lower half of the area S. According to the comparison results, a control signal is produced, which

0 from the output of the matching unit 5 acts on the scanning unit 6 in such a way that the geometric center of the scanning area S is shifted up or down in proportion to the difference Check

s

 device operability is performed by block 7 of the control of the number of reflected signal signals. For this purpose, the inputs of this block are connected to the outputs of the adders.

0

In block 7, the total number of pulses, registered 1; horn1; 1H11, for a certain time from the nerve i Biopoi o reflector, with the specified minimum 4MC, TON, is compared; reflected signals / ;;. If the sum is N - {- jV

5 m, a command is received from the scanner unit 3 to the input of the blocking unit 6. But for this command, the scanning area is increased 4 times, and linear dimensions are 2 times larger. If necessary, the center square S is corrected in the manner described above. At the same time, the counter of 10 scanning cycles is turned on, the second input of KOTOpoi o receives information from block 7. In the event that. V cycles of the scanned layer of pulses that go to the second inlet; -, block 7. will appear less | strm 11M, pa his .hole formed KOMai: i :; mklocheni Olok; 12 warnings.

When po.ibcoBoi appears, the mobile g unit in the location of the reflecting elements successively overlaps the reflected lines from the first one and then from the second one to the reflecting element. As a result, a smaller number of .1сso will be fixed in the summation | 1e ЗЯ, than in the 5 summator 3-1. (jii iia, industrial differences / V --- V;: iiocTXTfiCT via b. yuc 7 to block 8 of calculation ivu Meini approx .; train trains. As Jos. 1; d-1ecp |) 1t reflected signals from both reflectors, In the next series of scanning cycles, the condition .m is also fulfilled and the health check unit by means of the scanner unit 3 switches unit 7 to the laser generator and the reflecting elements installed in the approach train control zone, which, in order to increase reliability, it is equipped with a block unfolding area di 4s. After ki, the beam pointing unit at the price of 7 p;

echoes will not be received by scanners, by the scanner

when scanning over a large area of 4S, - F block 7 through the counter 10 turns on block 12

alerts to indicate

a scan cycle counter, a unit calculating the train travel time to

 fj- .iv / iDjicnnn site travel work, control unit

the trains. At the same time, from block 8 of the computed-10, the number of reflected signals of the nvrLV counting blocks of the train to the area of reflected signals, one input of which

The pathway of the difference information is connected to the output of the receiver, another

. The Tipp of the recorded output to the first output of the scanner unit over a small area enters, the output to one input of the unit nana the display unit 9 of the speed of driving and driving the beam to the center of the area of the scan-moving unit and the other input connected to no appearance of the train. the second output of the scanner, one and

1In this way, the use of offer-and-other outputs — with the inputs of the scooter unit, allows for time-keeping and the number control unit to notify the workers on the tracks about the approached signals, the first, second and third

railroad mobile unit and half 20 outputs of which are connected respectively ...... P approximate estimate by the input of the unit for calculating the train movement time to the track work area, one input of the scan cycle counter and the input of the scanner, the third and fourth outputs of which are connected to 25 other inputs, respectively, of the scanning unit and the scan cycle counter, the output of the latter is connected to the input of the alarm unit, the output of the scanning unit is connected to the input of the laser generator.

the speed of movement of the rail mobile unit.

Claims (1)

Invention Formula A device for automatically signaling the approach of a train to the track section, containing a receiver installed at the site that is connected to the alarm block, a laser generator and reflective elements installed in the train approach control zone, characterized in that, in order to increase reliability, it is equipped with a block scanner, beam guidance unit at a price of 7p 7; o