CN206217921U - A kind of steel rail type track circuit shunting system - Google Patents

Abstract

A kind of steel rail type track circuit shunting system, the four meter shaft pulse signals produced by the magnetic head formula wheel detector installed in track block section two ends, each meter shaft pulse signal is detected by two magnetic head formula wheel detectors installed in left and right track to wheel, when two magnetic head formula wheel detectors only installed in left and right track are detected simultaneously by wheel and export useful signal, just make the meter shaft pulse signal of output effective.System carries out automatic discrimination to four tunnel meter shaft pulse signals, and the axletree to entering errant block section is counted, and when the axletree quantity for entering errant block section is identical, makes track block section Seize ACK message invalid automatically.Meter shaft pulse signal eliminates the shaking interference that unit filters narrow pulse interference and signal edge by impulse disturbances, further increases antijamming capability.The system is used to replace existing track branch circuit.

Description

A kind of steel rail type track circuit shunting system

Technical field

The utility model is related to a kind of track circuit, especially a kind of steel rail type track circuit shunting system.

Background technology

Track circuit rail level is because the influence of bad conducting objects causes track circuit shunting badness, train or locomotive to take rail The track relay of the track section is controlled during road can not be operating normally, and cause interlocking of signals to fail.Using axle count sensor side During case, mechanical pick-up device produces the signal that train arrives by the break-make of spring coordination electrode contact, easily produces contact to connect Touch bad and signal jitter interference；The infrared ray of infrared sensor is easily blocked by dust and debris, and is easily done by other illumination Disturb generation disturbing pulse；Ultrasound piezoelectric transducer due to must it is exposed outside, it is impossible to effectively protected, while also easily receiving To the interference effect of other barriers such as construction worker, disturbing pulse is produced；Eddy current coil sensing, magnetic head sensor sensing are easy Influenceed by metal sundries, for example, when construction of railways personnel hold spade and slip over magnetic head sensor, easily differentiating to magnetic head and making Into interference, disturbing pulse is exported.Above-mentioned various sensors are made when wheel enters or exits detection interval because vehicle passes through Into sensor vibration, wheel itself vibration and the reason such as sensor itself contact chatter, will also result in transducing signal edge Produce Vibrating pulse.

The content of the invention

In order to solve the problems, such as existing track circuit shunting badness, the utility model provides a kind of steel rail type track circuit Branch system, including the first from left magnetic head formula wheel detector, right magnetic head formula wheel detector, the second from left magnetic head formula wheel detector, Right two magnetic head formula wheel detectors, left three magnetic heads formula wheel detector, right three magnetic heads formula wheel detector, left quadruplex videotape recorder formula wheel Sensor, right quadruplex videotape recorder formula wheel detector, the first meter shaft pulse unit, the second meter shaft pulse unit；3rd meter shaft pulse list Unit, the 4th meter shaft pulse unit, meter shaft branching unit.

The first from left magnetic head formula wheel detector, right magnetic head formula wheel detector, the second from left magnetic head formula wheel detector, the right side Two magnetic head formula wheel detectors, left three magnetic heads formula wheel detector, right three magnetic heads formula wheel detector, left quadruplex videotape recorder formula wheel are passed Sensor, right quadruplex videotape recorder formula wheel detector export the first from left wheel-sensors signal, right wheel-sensors signal, the second from left wheel and pass respectively Sense signal, right two wheel-sensors signal, left three wheel-sensors signal, right three wheel-sensors signal, left four wheel-sensors signal, the right side Four wheel-sensors signals.

The first from left wheel-sensors signal and right wheel-sensors signal deliver to the first meter shaft pulse unit, and the second from left wheel is passed Sense signal and right two wheel-sensors signal deliver to the second meter shaft pulse unit, and left three wheel-sensors signal and right three wheel-sensors are believed Number the 3rd meter shaft pulse unit is delivered to, left four wheel-sensors signal and right four wheel-sensors signal deliver to the 4th meter shaft pulse list Unit.

The first meter shaft pulse unit exports the first meter shaft pulse signal, and the second meter shaft pulse unit exports the second meter shaft Pulse signal, the 3rd meter shaft pulse unit exports the 3rd meter shaft pulse signal, and the 4th meter shaft pulse unit exports the 4th meter shaft arteries and veins Rush signal；The first meter shaft pulse signal, the second meter shaft pulse signal, the 3rd meter shaft pulse signal, the 4th meter shaft pulse letter Number deliver to meter shaft branching unit, the meter shaft branching unit output track block section Seize ACK message.

The first from left magnetic head formula wheel detector is arranged on outside or inner side, the right magnetic head formula wheel-sensors of left track Device is arranged on the outside or inner side of right track, and on same axletree line；The second from left magnetic head formula wheel detector is installed The outside or inner side of right track are arranged in the outside or inner side of left track, right two magnetic heads formula wheel detector, and are in On same axletree line；The left three magnetic heads formula wheel detector is arranged on outside or inner side, the right three magnetic heads formula car of left track Wheel sensor is arranged on the outside or inner side of right track, and on same axletree line；The left quadruplex videotape recorder formula wheel-sensors Device is arranged on the outside or inner side that the outside or inner side of left track, right quadruplex videotape recorder formula wheel detector are arranged on right track, And on same axletree line.

The meter shaft branching unit includes count pulse generation module, counter module, discrimination module；The count pulse The input of generation module is the first meter shaft pulse signal, the second meter shaft pulse signal, the 3rd meter shaft pulse signal, the 4th meter shaft arteries and veins Signal is rushed, is output as adding count pulse, subtracted count pulse；Described plus count pulse, subtract count pulse and deliver to counter module；Institute The input for stating discrimination module is connected to the output of counter module, is output as track block section Seize ACK message.

The steel rail type track circuit shunting system also filters unit, the second impulse disturbances and filters including the first impulse disturbances Unit, the 3rd impulse disturbances filter unit, the 4th impulse disturbances and filter unit.

The first meter shaft pulse signal, the second meter shaft pulse signal, the 3rd meter shaft pulse signal, the 4th meter shaft pulse letter Number filter unit, the second impulse disturbances through the first impulse disturbances respectively and filter unit, the 3rd impulse disturbances and filter unit, the 4th arteries and veins Meter shaft branching unit is delivered to again after rushing interference filtering unit filtering interfering waveform.

First impulse disturbances filter unit, the second impulse disturbances and filter unit, the 3rd impulse disturbances and filter unit, Four impulse disturbances filter unit for structural parameters identical impulse disturbances filter unit.

The impulse disturbances filter unit includes positive anti-jamming circuit, reverse anti-jamming circuit, data selector；It is described The input signal of positive anti-jamming circuit and reverse anti-jamming circuit filters the input pulse of unit for impulse disturbances；The data Selector is alternative data selector；Two data input pins of the data selector are respectively connecting to positive anti-interference electricity Road and the output end of reverse anti-jamming circuit；The output signal of the data selector filters the output arteries and veins of unit for impulse disturbances Punching；The data selector selection control end is connected to output pulse.

The positive anti-jamming circuit includes that repid discharge diode, charging resistor, positive anti-interference capacitor, forward direction are anti-dry Disturb Schmidt circuit；The repid discharge diode cathode is positive anti-jamming circuit input, and anode is connected to positive anti-dry Disturb Schmidt circuit input；The charging resistor and repid discharge diodes in parallel；One end of the positive anti-interference capacitor Be connected to positive anti-interference Schmidt circuit input, other end be connected to impulse disturbances filter unit publicly or Power supply.

The reverse anti-jamming circuit includes quick charge diode, discharge resistance, reverse anti-interference capacitor, reversely anti-dry Disturb Schmidt circuit；The quick charge diode anode is reverse anti-jamming circuit input, and negative electrode is connected to reversely anti-dry Disturb Schmidt circuit input；The discharge resistance and quick charge diodes in parallel；One end of the reverse anti-interference capacitor Be connected to reverse anti-interference Schmidt circuit input, other end be connected to impulse disturbances filter unit publicly or Power supply.

The positive anti-interference Schmidt circuit output end is positive anti-jamming circuit output end, reverse anti-interference Schmidt Circuit output end is reverse anti-jamming circuit output end.

The beneficial effects of the utility model are：The system is detected on same axletree simultaneously by left and right two sensors Wheel, only left and right two sensors detect effective simultaneously, just export effective meter shaft pulse signal, can effectively eliminate The various interference signals of single-sensor output；System carries out automatic discrimination to 4 tunnel meter shaft pulse signals, inaccessible to entering errant Interval axletree is counted, and when the axletree quantity for entering errant block section is identical, automatically takes track block section Invalidating signal；Meter shaft pulse signal filters the shaking interference that unit filters narrow pulse interference and signal edge by impulse disturbances, enters One step improves the antijamming capability of system, and impulse disturbances filter the burst pulse Breadth Maximum of unit filtering can be by changing Charge constant is adjusted with discharge time constant.

Brief description of the drawings

Fig. 1 is magnetic head formula wheel detector installation site embodiment；

Fig. 2 is steel rail type track circuit shunting system embodiment structured flowchart；

Fig. 3 is meter shaft branching unit example structure block diagram；

Fig. 4 is the entrance logic state example ripple that the first meter shaft pulse signal and the second meter shaft pulse signal meet axletree Shape；

Fig. 5 is the first meter shaft pulse signal and the second meter shaft pulse signal meets axletree rolls logic state example ripple away from Shape；

Fig. 6 is the 3rd meter shaft pulse signal and the 4th meter shaft pulse signal meets axletree rolls logic state example ripple away from Shape；

Fig. 7 is the entrance logic state example ripple that the 3rd meter shaft pulse signal and the 4th meter shaft pulse signal meet axletree Shape；

Fig. 8 produces circuit embodiments to add count pulse or subtracting count pulse；

Fig. 9 filters unit embodiment for impulse disturbances；

Figure 10 filters the waveform of unit embodiment for impulse disturbances；

Figure 11 is the embodiment of counter module and discrimination module；

Figure 12 is the embodiment of the Schmidt circuit with high input impedance charcteristic.

Specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

It is as shown in Figure 1 wheel detector installation site embodiment.A first from left magnetic head formula wheel detector 201, right wheel Sensor 202 is separately mounted to left track 101, the inner side of right track 102, and on same axletree line B1.In locomotive, train Traveling in, when wheel shaft traveler car axis B1 positions, the first from left magnetic head formula wheel detector 201 and right magnetic head formula wheel Sensor 202 is respectively induced left and right wheel and exports useful signal simultaneously.The first from left magnetic head formula wheel detector 201 and right one Magnetic head formula wheel detector 202 needs to be separately mounted to left and right track outside or inner side, can be while or being separately mounted to Track outside or inner side, but necessarily be on same axletree line, i.e. the first from left magnetic head formula wheel detector 201 and right magnetic head formula Wheel detector 202 needs simultaneously to sense the left and right wheel on same axletree.

The second from left magnetic head formula wheel detector 203, right two magnetic heads formula wheel detector 204 are separately mounted to left track 101, the right side The inner side of track 102, and on same axletree line B2.In locomotive, the traveling of train, as wheel shaft traveler car axis B2 During position, the second from left magnetic head formula wheel detector 203 and right two magnetic heads formula wheel detector 204 are respectively induced left and right wheel simultaneously Useful signal is exported simultaneously.The second from left magnetic head formula wheel detector 203 and right two magnetic heads formula wheel detector 204 need to be respectively mounted On the outside of left and right track or inner side, can simultaneously or be separately mounted on track, outside or inner side, but necessarily be in On same axletree line, i.e., the second from left magnetic head formula wheel detector 203 and right two magnetic heads formula wheel detector 204 are needed simultaneously to same Left and right wheel on axletree is sensed.

Left three magnetic head formula wheel detectors 205, right three magnetic heads formula wheel detector 206 are separately mounted to left track 101, the right side The inner side of track 102, and on same axletree line B3.In locomotive, the traveling of train, as wheel shaft traveler car axis B3 During position, left three magnetic heads formula wheel detector 205 and right three magnetic heads formula wheel detector 206 are respectively induced left and right wheel simultaneously Useful signal is exported simultaneously.Left three magnetic head formula wheel detectors 205 and right three magnetic heads formula wheel detector 206 need to be respectively mounted On the outside of left and right track or inner side, simultaneously or track outside or inner side can be separately mounted to, but necessarily be in same On axletree line, i.e., left three magnetic heads formula wheel detector 205 and right three magnetic heads formula wheel detector 206 are needed simultaneously to same axletree On left and right wheel sensed.

Left quadruplex videotape recorder formula wheel detector 207, right quadruplex videotape recorder formula wheel detector 208 are separately mounted to left track 101, the right side The inner side of track 102, and on same axletree line B4.In locomotive, the traveling of train, as wheel shaft traveler car axis B4 During position, left quadruplex videotape recorder formula wheel detector 207 and right quadruplex videotape recorder formula wheel detector 208 are respectively induced left and right wheel simultaneously Useful signal is exported simultaneously.Left quadruplex videotape recorder formula wheel detector 207 and right quadruplex videotape recorder formula wheel detector 208 need to be respectively mounted On the outside of left and right track or inner side, can simultaneously or be separately mounted on track, outside or inner side, but necessarily be in On same axletree line, i.e., left quadruplex videotape recorder formula wheel detector 207 and right quadruplex videotape recorder formula wheel detector 208 are needed simultaneously to same Left and right wheel on axletree is sensed.

Fig. 2 show steel rail type track circuit shunting system embodiment structured flowchart.The first from left magnetic head formula wheel detector 201st, right magnetic head formula wheel detector 202, the second from left magnetic head formula wheel detector 203, right two magnetic heads formula wheel detector 204, Left three magnetic head formula wheel detectors 205, right three magnetic heads formula wheel detector 206, left quadruplex videotape recorder formula wheel detector 207, right four Magnetic head formula wheel detector 208 exports the first from left wheel-sensors signal Z1, right wheel-sensors signal Y1, the second from left wheel-sensors respectively Signal Z2, right two wheel-sensors signal Y2, left three wheel-sensors signal Z3, right three wheel-sensors signal Y3, left four wheel-sensors Signal Z4, right four wheel-sensors signal Y4, Z1, Y1 deliver to the input of the first meter shaft pulse unit 301, and Z2, Y2 deliver to second The input of meter shaft pulse unit 302, Z3, Y3 deliver to the input of the 3rd meter shaft pulse unit 303, and Z4, Y4 deliver to the 4th meter The input of axle pulse unit 304.

In system shown in Figure 2 embodiment, the first meter shaft pulse unit 301, the second meter shaft pulse unit 302, the 3rd meter shaft Pulse unit 303, the 4th meter shaft pulse unit 304 are structure function identical meter shaft pulse unit, with 2 input I1, I2,1 output end O1.The function of meter shaft pulse unit is：Only when 2 input I1, I2 signals are all effective, output O1 just has Effect.If input signal is effective high level, that is, when having detected wheel, wheel detector is output as high level, then meter shaft arteries and veins Rushing unit is and gate circuit；If input signal is Low level effective, that is, when having detected wheel, wheel detector is output as low Level, then meter shaft pulse unit is OR circuit.If be input into 2 wheel sensor signals one of meter shaft pulse unit being Effectively, another is Low level effective to high level, it is only necessary to which an output end for wheel detector increases by one instead wherein Phase device can just make 2 wheel sensor signals simultaneously for high level is effective, or be simultaneously Low level effective.

In system shown in Figure 2 embodiment, the first meter shaft pulse unit 301, the second meter shaft pulse unit 302, the 3rd meter shaft Pulse unit 303, the first meter shaft pulse signal M1, the second meter shaft pulse signal M2, the 3rd of the output of the 4th meter shaft pulse unit Meter shaft pulse signal M3, the 4th meter shaft pulse signal M4 are sent to meter shaft branching unit 500, the output rail of meter shaft branching unit 500 Road block section Seize ACK message J1.

It is illustrated in figure 3 meter shaft branching unit example structure block diagram, including count pulse generation module 501, counter Module 502, discrimination module 503.

The first from left magnetic head formula wheel detector 201, right magnetic head formula wheel detector 202, the second from left magnetic head formula wheel detector 203rd, right two magnetic heads formula wheel detector 204 be arranged on track block section one end be used for detect locomotive (train) whether from this End enters or rolls away from, left three magnetic heads formula wheel detector 205, right three magnetic heads formula wheel detector 206, left quadruplex videotape recorder formula wheel The other end that sensor 207, right quadruplex videotape recorder formula wheel detector 208 are arranged on track block section is used to detect locomotive (row Car) whether enter or roll away from from the end.

It is illustrated in figure 4 the first meter shaft pulse signal and the second meter shaft pulse signal meets the entrance logic state of axletree and shows Example waveform, Fig. 5 show the first meter shaft pulse signal and the second meter shaft pulse signal meets axletree rolls logic state example away from Waveform.

In Fig. 1 embodiments, locomotive (train) is from the first from left magnetic head formula wheel detector 201, right magnetic head formula wheel detector 202nd, when the second from left magnetic head formula wheel detector 203, right two magnetic heads formula wheel detector, 204 installation end injection block section, First have the first meter shaft pulse signal M1, after have the second meter shaft pulse signal M2, and wheel detector installation site axletree line B1 With the wheel diameter of the distance less than locomotive (train) of axletree line B2, it is ensured that M2 is to start effectively before M1 useful signals disappear. Differentiating the condition of the entrance logic state that the first meter shaft pulse signal M1 and the second meter shaft pulse signal M2 meet axletree is： Two meter shaft pulse signal M2 valid periods, the first meter shaft pulse signal M1 is from being effectively changed into invalid.In Fig. 4, signal in embodiment M1, signal M2 are Low level effective, and between the low period of signal M2, signal M1 is changed into high level and meets axletree from low level Entrance logic state, plus count pulse output end H1 exports one plus count pulse, subtracts count pulse output end L1 and does not export Pulse.

Locomotive (train) is from the first from left magnetic head formula wheel detector 201, right magnetic head formula wheel detector 202, the second from left magnetic head When formula wheel detector 203, the right installation end of two magnetic heads formula wheel detector 204 roll track block section away from, first there is the second meter shaft Pulse signal M2, after have the first meter shaft pulse signal M1, and M1 is to start effectively before M2 useful signals disappear.Differentiate the first meter shaft The condition for rolling logic state away from that pulse signal M1 and the second meter shaft pulse signal M2 meet axletree is：In the first meter shaft pulse letter Number M1 valid periods, the second meter shaft pulse signal M2 is from being effectively changed into invalid.In Fig. 5, signal M1, signal M2 are in embodiment Low level effective, between the low period of signal M1, signal M2 is changed into the entrance logic shape that high level meets axletree from low level State, subtracts count pulse output end L1 outputs one and subtracts count pulse, plus count pulse output end H1 does not export pulse.

It is illustrated in figure 6 the 3rd meter shaft pulse signal and the 4th meter shaft pulse signal meets the logic state of rolling away from of axletree and shows Example waveform, Fig. 7 show the 3rd meter shaft pulse signal and the 4th meter shaft pulse signal meets the entrance logic state example of axletree Waveform.

In Fig. 1 embodiments, locomotive (train) is from left three magnetic heads formula wheel detector 205, right three magnetic heads formula wheel detector 206th, when left quadruplex videotape recorder formula wheel detector 207, the right installation end of quadruplex videotape recorder formula wheel detector 208 roll track block section away from, First have the 3rd meter shaft pulse signal M3, after have a 4th meter shaft pulse signal M4, and wheel detector installation site axletree line B3 With the wheel diameter of the distance less than locomotive (train) of axletree line B4, it is ensured that M4 is to start effectively before M3 useful signals disappear. Differentiating the condition of the output logic state that the 3rd meter shaft pulse signal M3 and the 4th meter shaft pulse signal M4 meet axletree is： Four meter shaft pulse signal M4 valid periods, the 3rd meter shaft pulse signal M3 is from being effectively changed into invalid.In Fig. 6, signal in embodiment M3, signal M4 are Low level effective, and between the low period of signal M4, signal M3 is changed into high level and meets axletree from low level Entrance logic state, subtract count pulse output end L1 and export one and subtract count pulse, plus count pulse output end H1 is not exported Pulse.

Locomotive (train) is from left three magnetic heads formula wheel detector 205, right three magnetic heads formula wheel detector 206, left quadruplex videotape recorder When formula wheel detector 207, right 208 installation end injection block section of quadruplex videotape recorder formula wheel detector, first there is the 4th meter shaft Pulse signal M4, after have a 3rd meter shaft pulse signal M3, and M3 is to start effectively before M4 useful signals disappear.Differentiate the 3rd meter shaft The condition for rolling logic state away from that pulse signal M3 and the 4th meter shaft pulse signal M4 meet axletree is：In the 3rd meter shaft pulse letter Number M3 valid periods, the 4th meter shaft pulse signal M4 is from being effectively changed into invalid.In Fig. 7, signal M3, signal M4 are in embodiment Low level effective, between the low period of signal M3, signal M4 is changed into the entrance logic shape that high level meets axletree from low level State, plus count pulse output end H1 exports one plus count pulse, subtracts count pulse output end L1 and does not export pulse.

It is illustrated in figure 8 to add count pulse or subtract count pulse and produces circuit embodiments.In Fig. 8, C51, R51, D51 group Into differential circuit the rising edge in K2 signals can be converted to a positive pulse；Phase inverter F51 is by negative meter shaft pulse signal Be converted to positive meter shaft pulse signal.If K1 is M2 in Fig. 8, K2 is M1, then NAND gate F52 is output as plus count pulse H11；If K1 is M3 in Fig. 8, and K2 is M4, then NAND gate F52 is output as plus count pulse H12；Plus count pulse H11, plus count pulse H12 is negative pulse；In count pulse generation module 501, any one has in adding count pulse H11, adding count pulse H12 When negative pulse is exported, plus count pulse H1 output negative pulses.

If K1 is M1 in Fig. 8, K2 is M2, then NAND gate F52 is output as subtracting count pulse L11；If K1 is M4 in Fig. 8, K2 is M3, then NAND gate F52 is output as subtracting count pulse L12；Subtract count pulse L11, subtract count pulse L12 and be negative arteries and veins Punching；In count pulse generation module 501, any one has negative pulse to export in subtracting count pulse L11, subtracting count pulse L12 When, subtract count pulse L1 output negative pulses.

Counter module 502 is forward-backward counter, and its CP+ is input into add count pulse input, CP- to subtract count pulse End.The output Q of counter module 502 delivers to discrimination module 503.When the output Q of counter module 502 is not equal to 0, output Track block section Seize ACK message J1 effectively, illustrates that track block section has locomotive (train)；Track relay is controlled when J1 is effective Device coil losing electricity, connects red light circuit or semaphore is shown that barrier is forbidden.When the output Q of counter module 502 is equal to 0 When, the track block section Seize ACK message J1 of output is invalid, illustrates that track block section does not have locomotive (train)；The invalid time controls of J1 Track relay coil processed obtains electric, connects green light circuit or semaphore is shown that safety is passed through.MR is long-range clear input, Long-range unified for counter module 502 resets.

First meter shaft pulse unit, the second meter shaft pulse unit, the 3rd meter shaft pulse unit, the 4th meter shaft pulse unit and The function of meter shaft branching unit can be realized using various middle scale logic circuits, can also using CPLD, FPGA, PAL, The devices such as GAL are realized.

Be illustrated in figure 9 impulse disturbances and filter unit embodiment, including positive anti-jamming circuit, reverse anti-jamming circuit, Data selector.In embodiment, repid discharge diode, charging resistor, positive anti-interference capacitor, positive anti-interference Schmidt's electricity Road is respectively diode D11, resistance R11, electric capacity C11, Schmidt circuit F11, constitutes positive anti-jamming circuit；Quick charge Diode, discharge resistance, reverse anti-interference capacitor, reverse anti-interference Schmidt circuit are respectively diode D21, resistance R21, electricity Hold C21, Schmidt circuit F21, constitute reverse anti-jamming circuit.The input of the one termination Schmidt circuit F11 of electric capacity C11 End, other end is connected to publicly；The input of the one termination Schmidt circuit F21 of electric capacity C21, other end is connected to public affairs Altogether.P1 is input pulse end, and P2 is output pulse ends.

In Fig. 9 embodiments, data selector T11 is alternative data selector, and two data input signals are believed with output All it is same phase relation between number, Schmidt circuit F11, Schmidt circuit F21 are same phase Schmidt circuit, therefore, data choosing Select between device T11 outputs and positive anti-jamming circuit input is same phase relation, data selector T11 outputs and reverse anti-interference electricity Also it is same phase relation between the input of road.The function of data selector T11 is：When control end A=0 is selected, Y=D1 is exported；When During selection control end A=1, Y=D2 is exported.The output end Y (i.e. pulse output end P2) of data selector T11 is connected directly to number According to the selection control end A of selector T11, when output pulse P2 is low level, control data selector T11 selection Schmidt circuits The output signal A3 of F11 is sent to the output end Y of data selector；When output pulse P2 is high level, control data selector T11 The output signal A4 of selection Schmidt circuit F21 is sent to the output end Y of data selector.

Figure 10 filters the waveform of unit embodiment, including input pulse P1 and Schmidt circuit F11 outputs for impulse disturbances A3, Schmidt circuit F21 output A4, the waveform of output pulse P2.In Fig. 9, diode D11, resistance R11, electric capacity C11 are constituted not Symmetrical charge-discharge circuit, Schmidt circuit F11 is same phase Schmidt circuit, when input pulse P1 is maintained low level for a long time When, the output A3 of Schmidt circuit F11 is low level；When input pulse P1 is maintained high level for a long time, A3 is high level. P1 signals are fast to electric capacity C11 electric discharges, and when input pulse P1 becomes low level from high level, A1 current potentials are immediately turned into low level electricity Position, A3 becomes low level from high level immediately.P1 signals charge slowly to electric capacity C11, when input pulse P1 becomes high from low level During level, A1 current potentials from P1 high level signals by resistance R11 to electric capacity C11 charge and rise, when charging between reach T1, A1 When current potential rising meets and exceeds the upper limit threshold voltage of Schmidt circuit F11, A3 becomes high level from low level；When P1 just Pulse width is less than T1, and the charging interval is less than T1, and P1 becomes when A1 current potentials are not up to the upper limit threshold voltage of Schmidt circuit F11 Into low level, A1 current potentials are immediately turned into low level current potential, and A3 maintains low level state.In Figure 10, the original state of P1 and A3 is Low level.Positive burst pulse 11, positive burst pulse 12, the width of positive burst pulse 13 are respectively less than T1, A1 current potentials cannot be charged to or Upper limit threshold voltage more than Schmidt circuit F11, does not influence on A3 states；The width of the positive pulse 14 of P1 is more than T1, because This, after the rising edge of the positive pulse 14 of P1 crosses time T1, A3 is changed into high level from low level.The trailing edge of the positive pulse 14 of P1 A3 is set to be changed into low level from high level, the width of the positive pulse 15 of P1 is more than T1, after the rising edge of positive pulse 15 crosses time T1, A3 It is changed into high level from low level.The trailing edge of the positive pulse 15 of P1 makes A3 be changed into low level from high level, the positive pulse 16 of P1, just Pulse 17, the width of positive pulse 18 are respectively less than T1, therefore, positive pulse 16, positive pulse 17, positive pulse 18 do not influence on A3, A3 Maintain low level state.The width of the positive pulse 19 of P1 is more than T1, and after the rising edge of positive pulse 19 crosses time T1, A3 is from low level It is changed into high level.

In Fig. 9, diode D21, resistance R21, electric capacity C21 equally constitute asymmetric charge-discharge circuit, Schmidt circuit F21 It is same phase Schmidt circuit, when input pulse P1 is maintained low level for a long time, the output A4 of Schmidt circuit F21 is low electricity It is flat；When input pulse P1 is maintained high level for a long time, A4 is high level.P1 signals charge soon to electric capacity C21, when input arteries and veins Rush P1 from low level become high level when, A2 current potentials are immediately turned into high level current potential, and A4 becomes high level from low level immediately.P1 Signal is slow to electric capacity C21 electric discharges, and when input pulse P1 becomes low level from high level, A2 current potentials are passed through by P1 low level signals Resistance R21 to electric capacity C21 discharge, upon discharging between reach T2, A2 current potentials drop below the lower limit threshold of Schmidt circuit F21 During voltage, A4 becomes low level from high level；When P1 negative pulse width be less than T2, discharge time be less than T2, A2 current potentials not under When drop reaches the lower limit threshold voltage of Schmidt circuit F21, P1 is to become high level, and A2 current potentials are immediately turned into high level current potential, A4 maintains high level state.In Figure 10, the original state of P1 and A4 is low level.The rising edge of the positive pulse 11 of P1 makes A4 from low Level is changed into high level, and the width of the negative pulse 20 of P1 is more than T2, and after the trailing edge of negative pulse 20 crosses time T2, A4 is from high level It is changed into low level.The rising edge of the positive pulse 12 of P1 makes A4 be changed into high level from low level, the negative pulse 20 of P1, negative pulse 21 Width is respectively less than T2, therefore, negative pulse 20, negative pulse 21 do not influence on A4, and A4 maintains low level state.It is negative pulse 23, negative Pulse 24, negative pulse 25, the width of negative pulse 26 are respectively less than T2, and A2 current potentials cannot be through discharging at or below Schmidt circuit The lower limit threshold voltage of F21, does not influence on A4 states；The width of the negative pulse 27 of P1 is more than T2, therefore, in the negative pulse of P1 After 27 trailing edge crosses time T2, A4 is changed into low level from high level.In the rising edge of the negative pulse 27 of P1, A4 becomes from low level It is high level.

The output A3 of Schmidt circuit F11 input pulse P1 be low level when keep low level, input pulse P1 by Time T1 excessively is just changed into high level after low level is changed into high level.The output A4 of Schmidt circuit F21 is height in input pulse P1 High level is kept during level, time T2 is crossed after input pulse P1 is changed into low level from high level and is just changed into low level.In other words, When A3 is high level, A4 must be high level；When A4 is low level, A3 must be low level.

In Figure 10, the original state of A3, A4 is low level, and the output Y of data selector T11 is low level, data choosing Device T11 selection A3 are selected as output Y and in A3 for low level period maintains.When A3 is changed into high level at edge 30 from low level When, output Y is changed into high level, and data selector T11 selects A4 as output Y, and now A4 must be high level, maintain output Y High level state.When A4 is changed into low level at edge 31 from high level, output Y is changed into low level, data selector T11 choosings A3 is selected as output Y, now A3 must be low level, maintain the low level state of output Y.When A3 becomes at edge 32 from low level During for high level, output Y is changed into high level, and data selector T11 selects A4 as output Y, and now A4 must be high level, dimension Hold the high level state of output Y.

Impulse disturbances filter unit by the burst pulse 11 in P1 signals, burst pulse 12, burst pulse 13, burst pulse 23, narrow arteries and veins Punching 24, burst pulse 25, burst pulse 26 is all filtered out, and positive broad pulse 14 (including positive pulse 14, positive pulse 15, positive pulse 16, just Pulse 17 and positive pulse 18, negative pulse 23, negative pulse 24, negative pulse 25, negative pulse 26 are disturbing pulse), the negative energy of broad pulse 27 Enough pass through, make corresponding positive broad pulse 28 and negative broad pulse 29 occur in P2 signals.The output same phases of pulse P2 and input pulse P1, And the rising edge of broad pulse 28 for exporting is than the rising edge lag time T1 of positive broad pulse 14, trailing edge lag time T2 of input.

Positive pulse 11, positive pulse 12, positive pulse 13 are positive burst pulse, and wherein positive pulse 11 is single disturbing pulse, positive arteries and veins Punching 12, positive pulse 13 is continuous Vibrating pulse.Time T1 filters the positive burst pulse of maximum that unit can be filtered for impulse disturbances Width.T1 is upper by charge constant, the high level current potential of input pulse P1, low level current potential and Schmidt circuit F11's Limit threshold voltage joint effect.Under normal circumstances, the high level current potential of input pulse P1, low level current potential are definite value, therefore, adjust The value of whole T1 can be carried out by changing the upper limit threshold voltage of charge constant or Schmidt circuit F11.In Fig. 9, Charge constant is the product of charging resistor R11 and electric capacity C11.The impulse disturbances filter what unit allowed width more than T1 Positive pulse signal passes through.

Negative pulse 23, negative pulse 24, negative pulse 25, negative pulse 26 are negative burst pulse, and wherein negative pulse 23 is single interference Pulse, negative pulse 24, negative pulse 25, negative pulse 26 are continuous Vibrating pulse.Time T2 for impulse disturbances filter unit can The negative narrow pulse width of the maximum of filtering.T2 be subject to discharge time constant, the high level current potential of input pulse P1, low level current potential and The lower limit threshold voltage joint effect of Schmidt circuit F21.Under normal circumstances, high level current potential, the low level of input pulse P1 Current potential is definite value, therefore, the value for adjusting T2 can be by changing the lower limit threshold of discharge time constant or Schmidt circuit F21 Voltage is carried out.In Fig. 9, discharge time constant is the product of discharge resistance R21 and electric capacity C21.The impulse disturbances filter list Unit allows undersuing of the width more than T2 to pass through.

In Fig. 9, one end that electric capacity C11 connects publicly can filter the power supply end of unit with reconfiguration in impulse disturbances； Similarly, electric capacity C21 connect publicly one end can also individually or together with electric capacity C11 reconfiguration filters unit in impulse disturbances Power supply end.

In Fig. 9, Schmidt circuit F11, Schmidt circuit F21 can also simultaneously or separately select anti-phase Schmidt's electricity Road, can also be simultaneously or separately inverted relationship between input D1, D2 and output Y of data selector T11.When Schmidt's electricity Road F11, Schmidt circuit F21 simultaneously or separately select anti-phase Schmidt circuit, input D1, D2 of data selector T11 with , it is necessary to meet following condition when being simultaneously or separately inverted relationship between output Y, i.e.,：Believe when data selector T11 is exported When being same phase relation between number Y and positive anti-jamming circuit input signal, data selector T11 output signals Y with it is reversely anti-dry It is also same phase relation to disturb between circuit input signal；The output of the low level control selection Schmidt circuit F11 of Y is sent to data choosing The output end of device T11 is selected, the output of the high level control selections Schmidt circuit F21 of Y is sent to the output of data selector T11 End.When between data selector T11 output signals Y and positive anti-jamming circuit input signal for inverted relationship, data selection Also it is inverted relationship between device T11 output signals Y and reverse anti-jamming circuit input signal；The low level control selection of Y applies close The output of special circuit F21 is sent to the output end of data selector T11, the output of the high level control selections Schmidt circuit F11 of Y It is sent to the output end of data selector T11.

Figure 11 show the embodiment of counter module and discrimination module.In Figure 11, it is same that F81, F82 are 4 binary systems Step forward-backward counter 74HC193, collectively forms counter module.In F81, F82, to add counting input end, CPD is to subtract meter to CPU Number input, TCU is add carry pulse output end, and to subtract carry pulse output end, CR effectively resets input to TCD for high level End, LD is the data initialization control signal of Low level effective, and D3, D2, D1, D0 are preset data input, Q3, Q2, Q1, Q0 It is terminal count output.TCU, TCD of F81 is respectively connecting to CPU, CPD of F82, and F81, F82 collectively form 8 in cascaded fashion Position binary synchronous forward-backward counter, meter shaft scope is up to 255, wherein, counting output Q3, Q2, Q1, Q0 of F81 are 8 The low 4 of output is counted, counting output Q3, Q2, Q1, Q0 of F82 are 8 and count the high 4 of output, and they collectively constitute Fig. 3 The output Q of embodiment Counter module 502.The LD ends of F81, F82 directly input high level, i.e. LD and are in invalid shape State, now D3, D2, D1, D0 of F81, F82 can take over what level, in Figure 11 embodiments, D3, D2, D1, D0 of F81, F82 are equal It is connected to low level.CPU, CPD of F81 is respectively CP+, CP- signal end of counter module.Resistance R81, electric capacity C81 are constituted Electrification reset circuit, the output of electrification reset circuit is connected to the CR ends of F81, F82, for it is upper electric when output to F81, F82 Q3, Q2, Q1, Q0 reset；MR is long-range clear input.+ VDD is the power supply of counter module.

In Figure 11, F83 is 8 input nor gates, and model 74HC4078 constitutes discrimination module.8 inputs of F83 are Fig. 3 The input DA of discrimination module 503, is connected to the terminal count output of F81, F82 in embodiment.F83 is output as track block section Seize ACK message J1.When F81, F82 counting output not all 0 when, the track block section Seize ACK message J1 of output is low electricity It is flat, and in effective status；When the counting of F81, F82 exports all 0, the track block section Seize ACK message J1 of output is High level, and in disarmed state.

The positive anti-interference Schmidt circuit, reversely anti-interference Schmidt circuit are Schmidt circuit, input signal It is the voltage on electric capacity, it is therefore desirable to Schmidt circuit has high input impedance charcteristic.Schmidt circuit can select have height Cmos schmitt phase inverter CD40106,74HC14 of input impedance characteristic, or selection have high input impedance charcteristic The devices such as cmos schmitt NAND gate CD4093,74HC24.Cmos schmitt phase inverter or cmos schmitt NAND gate it is upper Limit threshold voltage, lower limit threshold voltage are the fixed value related to device.With schmitt inverter or Schmidt's NAND gate Constitute with phase Schmidt circuit, it is necessary to increase one-level phase inverter behind schmitt inverter or Schmidt's NAND gate.

Figure 12 show the embodiment of the Schmidt circuit with high input impedance charcteristic, wherein, Figure 12 (a) is mutually to apply together Close special circuit, Figure 12 (b) is anti-phase Schmidt circuit.F91, F93 cmos schmitt of the selection with high input impedance charcteristic are anti- Phase device 74HC14, F92 selection phase inverter 74HC06.

Schmidt circuit is also an option that using operational amplifier to constitute, and Schmidt's electricity is constituted using operational amplifier Road can neatly change upper limit threshold voltage, lower limit threshold voltage.Similarly, Schmidt's electricity is constituted using operational amplifier , it is necessary to using structure and circuit with high input impedance charcteristic during road.

Data selector can select the devices such as 74HC151,74HC152,74HC153, CD4512, CD4539 to constitute two choosings One data selector, it is also possible to constitute alternative data selector with gate circuit.

Schmidt circuit, data selector can also be with the first meter shaft pulse unit, the second meter shaft pulse unit, the 3rd meters Axle pulse unit, the 4th meter shaft pulse unit and meter shaft branching unit are used together CPLD, FPGA to realize its function.

Claims (6)

1. a kind of steel rail type track circuit shunting system, it is characterised in that：

Including the first from left magnetic head formula wheel detector, right magnetic head formula wheel detector, the second from left magnetic head formula wheel detector, right two magnetic Hair style wheel detector, left three magnetic heads formula wheel detector, right three magnetic heads formula wheel detector, left quadruplex videotape recorder formula wheel-sensors Device, right quadruplex videotape recorder formula wheel detector, the first meter shaft pulse unit, the second meter shaft pulse unit；3rd meter shaft pulse unit, Four meter shaft pulse units, meter shaft branching unit；

The first from left magnetic head formula wheel detector, right magnetic head formula wheel detector, the second from left magnetic head formula wheel detector, right two magnetic Hair style wheel detector, left three magnetic heads formula wheel detector, right three magnetic heads formula wheel detector, left quadruplex videotape recorder formula wheel-sensors Device, right quadruplex videotape recorder formula wheel detector export the first from left wheel-sensors signal, right wheel-sensors signal, the second from left wheel-sensors respectively Signal, right two wheel-sensors signal, left three wheel-sensors signal, right three wheel-sensors signal, left four wheel-sensors signal, right four Wheel-sensors signal；

The first from left wheel-sensors signal and right wheel-sensors signal deliver to the first meter shaft pulse unit, the second from left wheel-sensors letter Number and right two wheel-sensors signal deliver to the second meter shaft pulse unit, left three wheel-sensors signal and right three wheel-sensors signal send To the 3rd meter shaft pulse unit, left four wheel-sensors signal and right four wheel-sensors signal deliver to the 4th meter shaft pulse unit；

The first meter shaft pulse unit exports the first meter shaft pulse signal, and the second meter shaft pulse unit exports the second meter shaft pulse Signal, the 3rd meter shaft pulse unit exports the 3rd meter shaft pulse signal, and the 4th meter shaft pulse unit exports the 4th meter shaft pulse letter Number；

The first meter shaft pulse signal, the second meter shaft pulse signal, the 3rd meter shaft pulse signal, the 4th meter shaft pulse signal send To meter shaft branching unit, the meter shaft branching unit output track block section Seize ACK message.

2. steel rail type track circuit shunting system according to claim 1, it is characterised in that：

The first from left magnetic head formula wheel detector is arranged on the outside or inner side of left track, right magnetic head formula wheel detector peace Mounted in the outside or inner side of right track, and on same axletree line；

The second from left magnetic head formula wheel detector is arranged on the outside or inner side of left track, right two magnetic heads formula wheel detector peace Mounted in the outside or inner side of right track, and on same axletree line；

The left three magnetic heads formula wheel detector is arranged on the outside or inner side of left track, right three magnetic heads formula wheel detector peace Mounted in the outside or inner side of right track, and on same axletree line；

The left quadruplex videotape recorder formula wheel detector is arranged on the outside or inner side of left track, right quadruplex videotape recorder formula wheel detector peace Mounted in the outside or inner side of right track, and on same axletree line.

3. steel rail type track circuit shunting system according to claim 2, it is characterised in that：

The meter shaft branching unit includes count pulse generation module, counter module, discrimination module；

The input of the count pulse generation module is the first meter shaft pulse signal, the second meter shaft pulse signal, the 3rd meter shaft arteries and veins Signal, the 4th meter shaft pulse signal are rushed, is output as adding count pulse, subtracted count pulse；

Described plus count pulse, subtract count pulse and deliver to counter module；

The input of the discrimination module is connected to the output of counter module, is output as track block section Seize ACK message.

4. the steel rail type track circuit shunting system according to any one of claim 2-3, it is characterised in that：

Also unit, the second impulse disturbances being filtered including the first impulse disturbances and filtering unit, the 3rd impulse disturbances filter unit, the 4th Impulse disturbances filter unit；

The first meter shaft pulse signal, the second meter shaft pulse signal, the 3rd meter shaft pulse signal, the 4th meter shaft pulse signal point Not through the first impulse disturbances filter unit, the second impulse disturbances filter unit, the 3rd impulse disturbances filter unit, the 4th pulse do Disturb and deliver to meter shaft branching unit again after filtering unit filtering interfering waveform.

5. steel rail type track circuit shunting system according to claim 4, it is characterised in that：

First impulse disturbances filter unit, the second impulse disturbances and filter unit, the 3rd impulse disturbances and filter unit, the 4th arteries and veins Interference filtering unit is rushed for structural parameters identical impulse disturbances filter unit；

The impulse disturbances filter unit includes positive anti-jamming circuit, reverse anti-jamming circuit, data selector；

The input signal of the positive anti-jamming circuit and reverse anti-jamming circuit filters the input pulse of unit for impulse disturbances；

The data selector is alternative data selector；Two data input pins of the data selector are respectively connecting to The output end of positive anti-jamming circuit and reverse anti-jamming circuit；

The output signal of the data selector filters the output pulse of unit for impulse disturbances；The data selector selection control End processed is connected to output pulse.

6. steel rail type track circuit shunting system according to claim 5, it is characterised in that：The positive anti-jamming circuit Including repid discharge diode, charging resistor, positive anti-interference capacitor, positive anti-interference Schmidt circuit；The repid discharge Diode cathode is positive anti-jamming circuit input, and anode is connected to positive anti-interference Schmidt circuit input；It is described to fill Resistance and repid discharge diodes in parallel；One end of the positive anti-interference capacitor is connected to positive anti-interference Schmidt circuit Input, other end be connected to impulse disturbances filter unit publicly or power supply；

The reverse anti-jamming circuit includes quick charge diode, discharge resistance, reverse anti-interference capacitor, reversely anti-interference applies Close special circuit；The quick charge diode anode is reverse anti-jamming circuit input, and negative electrode is connected to reversely anti-interference applying Close special circuit input end；The discharge resistance and quick charge diodes in parallel；One end connection of the reverse anti-interference capacitor To reverse anti-interference Schmidt circuit input, other end be connected to impulse disturbances filter unit publicly or power supply Power supply；

The positive anti-interference Schmidt circuit output end is positive anti-jamming circuit output end, reverse anti-interference Schmidt circuit Output end is reverse anti-jamming circuit output end.