CN105000007A - Anti-slide control device for urban rail braking system - Google Patents
Anti-slide control device for urban rail braking system Download PDFInfo
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- CN105000007A CN105000007A CN201510449535.1A CN201510449535A CN105000007A CN 105000007 A CN105000007 A CN 105000007A CN 201510449535 A CN201510449535 A CN 201510449535A CN 105000007 A CN105000007 A CN 105000007A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
- B60T8/1761—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
- B60T8/3235—Systems specially adapted for rail vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
- B60T8/885—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention discloses an anti-slide control device for an urban rail braking system. The anti-slide control device comprises a main control module and an anti-slide valve driving module, wherein the main control module is used for receiving a speed signal of an axle and a braking instruction, generating a corresponding valve driving signal, a control signal and a life signal, outputting the signals to the anti-slide valve driving module and judging an operation state of the anti-slide valve driving module according to a feedback signal, wherein the life signal is used for showing whether the operation is abnormal or not; the anti-slide valve driving module is used for driving an anti-slide valve and comprises a valve driving unit, an exhaust valve protecting unit and a relay unit control unit; the valve driving unit, the exhaust valve protecting unit and the relay unit control unit are connected with each other in sequence; the valve driving unit is used for receiving the valve driving signal, driving the anti-slide valve and transmitting the feedback signal; the exhaust valve protecting unit is used for outputting an anti-slide failure protection triggering signal; and the relay control unit is used for controlling an electric state of a relay. The anti-slide control device for the urban rail braking system, disclosed by the invention, is advantaged in that the structure of the device is simple and compact; reliability and safety in the anti-slide control are high; the device is flexible to control; and fault monitoring and positioning can be achieved.
Description
Technical field
The present invention relates to rail braking technology field, city, particularly relate to a kind of anti-skidding control device for city rail brake system.
Background technology
Along with the quickening of urbanization process, increasing people are seeking trip mode that is more convenient, more environmental protection, and urban track traffic is owing to having the plurality of advantages such as convenient and swift, environmental protection and being favored.The operation of city national highway train is different from main line railway vehicle, it needs to start frequently, speed governing, braking, this just has higher requirement to the performance of motor vehicle braking system.For adapting to the reality need that resource-efficient and environment friendly society is built, urban rail transit vehicles adopt brake system needs maximum as far as possible to utilize electric braking, make both to produce certain economic benefit by the recovery of energy, the mechanical wear of brake shoe can be reduced again and the impact reduced environment.For adapting to the feature of short range start and stop car, train must start soon, stopping distance is short, and this just requires that brake system device has flexible operation, response rapidly, the feature such as to stop steadily, accurate and braking force is large.City railway vehicle is dynamic, trailer marshaling, and it requires that the braking force of each vehicle of marshaling is consistent as far as possible, and can adapt to the change of train passenger amount, namely has the regulatory function of sky, loaded vehicle, the longitudinal impact of train during to reduce train braking.Namely city rail braking control system is with accident failure to the safe side for principle of design, again for operation provides sufficient safety control.
City rail brake system adopt electric braking and air brake and brake system (the empty composite brakig of the micro-processor controlled electricity of electrical command), namely Hybrid mode is carried out to air brake and electric braking.Electric braking adopts regenerative brake or rheostatic brake, and air brake adopts the micro-processor controlled through type electric control braking of electrical command.City rail braking control system forms primarily of braking control system, foundation brake system and Air supply system three parts.
Braking control system comprises braking force control system, brake signal generating and speed-slackening signal transmitting device, wherein braking force control system is the common control equipment receiving braking instruction, realize brake-power control, inside is integrated with brak control unit (BrakeControl Unit, BCU), choker relief valve class component etc.; Brake signal generating is driver controller; Brake signal device comprises central means and vehicle termination device, for collect and transmit braking instruction, receives braking mode instruction by means of train network control system.Air supply system is made up of, for brake system provides pressurized air, as the propulsion source of air brake air compressor, dryer and Air compressor on off control device, total reservoir, control air cylinder, the blast main running through full car and cock etc.Foundation brake system is made up of brake cylinder and brake shoe or brake disc etc., receives the control command controlled by BCU, produces corresponding braking force.Air slide control can with electric braking sliding brake function system coordination action, can make the wheel slided recover as early as possible adhesion.Whether air slides and controls to judge to produce in air brake process according to shaft speed signal slide and utilize antiskid valve to carry out anti-sliding control.Namely anti-sliding control is reduce braking force when braking force is about to exceed adhesion, makes wheel recover to roll or creep state, avoids wheel sliding.
In the rail brake system of city, anti-sliding control is illustrated in fig. 1 shown below, anti-sliding control module carries out anti-skidding judgement by the shaft speed signal of collection No. 4 speed sensor, independently 4 groups of antiskid valve (pressure retaining valve, blow off valve) are controlled, wheel can not be there is in braking procedure to scratch event, usually require that anti-skidding efficiency is not less than 75%.Antiskid control system is when judging to slide, and employ many criterions, these criterions mainly contain velocity contrast, deceleration/decel, deceleration/decel differential and slip rate etc.The method of velocity contrast and deceleration/decel uses commonplace, as shown in Figure 2, by the change of anti-skid controller according to velocity contrast, deceleration/decel etc., correspondingly controls braking force change to avoid wheel sliding.But no matter adopting any criterion, is all stick together anti-skidding as main purpose with making full use of.
In the rail braking control system of city, the overall principle of fault-safety principle is:
When train traction operation or coasting, the principle of braking system faults failure to the safe side will avoid producing less desirable braking force, maintains operation to enable train; When train braking stops, the principle of braking system faults failure to the safe side to ensure enough braking forces, guarantees that train can emergency; When air brake slide protective thrashing or fault, air brake by maintenance use and without slide protective.
Ensure that the major measure of fault-safety principle comprises:
The independently emergency braking security loop of charged mode when adopting normal, once dead electricity, train implements emergency braking automatically, and namely emergency braking is " dead electricity braking "; Adopt the service braking master mode of " dead electricity alleviation ", when deceleration of electrons control unit dead electricity, service braking is in relieved state; Adopt the monitoring brake controller having safe condition; Adopt the monitoring anti-skid controller having safe condition; Braking is not enough to be detected; Do not alleviate and detect and force alleviation; Guarantee safe parts redundant and the measure of fault function degradation.
By above-mentioned requirements; all need to possess high reliability for controlling functions, anti-skidding function for monitoring and anti-skidding fail safe function part in the rail antiskid control system of city; if when anti-sliding control module occurs that anti-sliding control is abnormal; air brake may be caused to insist on continuous minimizing even disappear, thus have influence on vehicle safety.In current antiskid control system, the functional circuit such as anti-skidding fail safe, antiskid valve driving is usually separate, each circuit is built by discrete device and is formed, and circuit structure is complicated, not easily controls, and each functional circuit can not realize self-inspection flexibly, safety and reliability are not high; When a failure occurs, also cannot realize the location of trouble point, be unfavorable for the maintenance and maintenance etc. of field apparatus.
Summary of the invention
The technical problem to be solved in the present invention is just: the technical matters existed for prior art, the invention provides a kind of simple and compact for structure, with low cost, anti-sliding control reliability and safety is high, control flexibly and can realize the anti-skidding control device for city rail brake system of fault monitoring and location.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is:
For an anti-skidding control device for city rail brake system, comprising:
Main control module, for receiving speed signal and the braking instruction of axletree, generate corresponding valve drive signal, control signal and for representing the life signal whether operation is abnormal, export to antiskid valve driver module, and judge the running state of described antiskid valve driver module according to feedback signal;
Antiskid valve driver module, for Anti-slip regulation valve, comprise the valve driver element, blow off valve protected location and the relay control unit that connect successively, described valve driver element receives described valve drive signal Anti-slip regulation valve and sends feedback signal, and described blow off valve protected location controls to export anti-skidding fail safe energizing signal according to the driving condition of blow off valve, described control signal; Described relay control unit according to described anti-skidding fail safe energizing signal, control signal and life signal control relay electricity condition, and send feedback signal.
As a further improvement on the present invention: described main control module also comprises valve drive signal control and protection unit, described valve drive signal control and protection unit controls the satisfied default protective condition of state of blow off valve drive singal and pressure retaining valve drive singal in described valve drive signal.
As a further improvement on the present invention: described blow off valve protected location comprises the blow off valve output monitoring circuit and protective circuit that connect successively, the input end of described blow off valve output monitoring circuit connects described valve driver element, and the mouth of described protective circuit connects described relay control unit; Described blow off valve output monitoring circuit monitors the driving condition of blow off valve and receives described control signal, according to monitoring the driving condition result and described control signal that obtain, controlling to start described protective circuit and exporting anti-skidding fail safe energizing signal.
As a further improvement on the present invention: described protective circuit comprises the OR circuit, time delay electronic circuit and the maintenance electronic circuit that connect successively, the driving condition result that described OR circuit accesses described control signal, blow off valve output monitoring circuit monitors, carries out or output protection control signal after computing; Described time delay electronic circuit sends energizing signal to described maintenance electronic circuit under described protecting control signal control, after described maintenance electronic circuit receives energizing signal, controls export anti-skidding fail safe energizing signal and keep preset duration.
As a further improvement on the present invention: described valve driver element comprises virtual protection circuit, buffer circuit, pressure retaining valve driving circuit and blow off valve driving circuit, described virtual protection circuit connects pressure retaining valve driving circuit and blow off valve driving circuit respectively by described buffer circuit; In valve drive signal described in described virtual protection control circui, the state of blow off valve drive singal and pressure retaining valve drive singal meets default protective condition.
As a further improvement on the present invention: described pressure retaining valve driving circuit, blow off valve driving circuit are metal-oxide-semiconductor driving circuit; The mouth of described metal-oxide-semiconductor driving circuit is also provided with rectifier diode in case backflow, and TVS diode is to prevent output voltage too high.
As a further improvement on the present invention: described relay control unit comprises control circuit, the first switching valve, second switch pipe and relay reactive circuit, described control circuit connects one end of relay coil by second switch pipe, described first switching valve connects the other end of described relay coil, the other end of described first switching valve connects described blow off valve protected location, by the conducting control relay of described first switching valve, second switch pipe electricity condition; Described control circuit receives described control signal and life signal, controls the conducting of described second switch pipe, and the anti-skidding fail safe energizing signal that described first switching valve exports according to described blow off valve protected location controls conducting; Described relay reactive circuit output relay obtains the feedback signal of electricity condition.
As a further improvement on the present invention: described first switching valve, second switch pipe are MOS switching valve, solid-state relay or optocoupler.
As a further improvement on the present invention: described relay control unit also comprises the conducting state for monitoring the first switching valve and sends the switching valve observation circuit of feedback signal, described switching valve observation circuit connects the mouth of described first switching valve.
As a further improvement on the present invention: described main control module comprises DSP main control unit and FPGA monitoring unit, data interaction is carried out by parallel bus between described DSP main control unit and FPGA monitoring unit; Described FPGA monitoring unit obtains brakig force distribution instruction, is transferred to described DSP main control unit, and monitors the running state of described DSP main control unit.
Compared with prior art, the invention has the advantages that:
1) city of the present invention rail brake system antiskid valve control setup comprises main control module and antiskid valve driver module, control cock driver element is carried out by main control module launching valve drive singal, carry out antiskid valve drived control, control blow off valve protected location and relay control unit by control signal and life signal simultaneously, realize monitoring anti-sliding control and protecting, thus can failure to the safe side measure in time when fault, anti-sliding control is flexible, and safety and unfailing performance high; The feedback signal simultaneously returned by antiskid valve driver module can also realize fault monitoring and location, when monitoring abnormal, can excise the output of antiskid valve driver module in time, to ensure vehicle safety, and being beneficial to maintenance and the maintenance of field apparatus;
2) by the life signal sending some cycles, main control module of the present invention reflects that whether operation is normal, whether antiskid valve driver module can respond main control module fast by life signal abnormal, thus when being judged as abnormal, antiskid valve driver module can be excised, ensure anti-sliding control safety; Main control module when occurring abnormal, can be controlled antiskid valve driver module by control signal, under normal circumstances simultaneously, then can assist and realize monitoring antiskid valve driver module and checking;
3) the present invention feeds back signal to main control module by antiskid valve driver module, then main control module can according to the valve drive signal of feedback signal and transmission, control signal and life signal, each point in antiskid valve driver module is detected, to judge the running state of antiskid valve driver module, and then ensure when the failure to the safe side measure in time of abnormal energy appears in circuit;
4) blow off valve protected location of the present invention comprises blow off valve output monitoring circuit further, the driving condition of blow off valve is monitored by blow off valve output monitoring circuit, when monitoring blow off valve and being abnormal, control to perform anti-skidding fail safe action, protection blow off valve controls safety; Blow off valve protected location of the present invention comprises the protective circuit be made up of hardware circuit further, and structure is simple, and can effectively perform anti-skidding fail safe;
5) invention relay control unit further by arrange two switch controlled relays electricity condition, with when anti-skidding inefficacy or abnormal condition, can the timely block system relay coil power of control two switching valves be passed through, improve alerting ability and the safety performance of anti-sliding control; Relay control unit further comprises switching valve observation circuit, to realize the supervision of switching valve, and thus can failure to the safe side measure in time when occurring abnormal.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of anti-sliding control in the rail brake system of city.
Fig. 2 is the principle schematic of anti-sliding control in the rail brake system of city.
Fig. 3 is the structural representation of the present embodiment for the anti-skidding control device of city rail brake system.
Fig. 4 is the structural representation of valve driver element in the present embodiment.
Fig. 5 is the structural representation of blow off valve protected location in the present embodiment.
Fig. 6 is the structural representation of the present embodiment repeat circuit control unit.
Fig. 7 is the structural principle schematic diagram of main control module in the specific embodiment of the invention.
Fig. 8 is the structural principle schematic diagram of one group of anti-skidding drived control of valve in the specific embodiment of the invention.
Fig. 9 is the structural principle schematic diagram of an antiskid valve driver module in the specific embodiment of the invention.
Marginal data: 1, main control module; 2, antiskid valve driver module; 21, valve driver element; 211, virtual protection circuit; 212, buffer circuit; 213, pressure retaining valve driving circuit; 214, blow off valve driving circuit; 22, blow off valve protected location; 221, blow off valve output monitoring circuit; 222, protective circuit; 23, relay control unit; 231, control circuit; 232, the first switching valve; 233, second switch pipe; 234, relay reactive circuit; 235, switching valve observation circuit.
Detailed description of the invention
Below in conjunction with Figure of description and concrete preferred embodiment, the invention will be further described, but protection domain not thereby limiting the invention.
As shown in Figure 3, the present embodiment is used for the anti-skidding control device of city rail brake system, comprising:
Main control module 1, for receiving speed signal and the braking instruction of axletree, generate corresponding valve drive signal, control signal, for representing the life signal whether operation abnormal, and export to antiskid valve driver module 2, and judge the running state of antiskid valve driver module 2 according to feedback signal;
Antiskid valve driver module 2, for Anti-slip regulation valve, comprise the valve driver element 21, blow off valve protected location 22 and the relay control unit 23 that connect successively, valve driver element 21 receiving valve drive singal Anti-slip regulation valve also sends feedback signal, and blow off valve protected location 22 exports anti-skidding fail safe energizing signal according to the driving condition of blow off valve, control signal; Relay control unit 23 according to anti-skidding fail safe energizing signal, control signal and life signal control relay electricity condition, and send feedback signal.
In the present embodiment, main control module 1 gathers shaft speed sensor signal, according to the braking instruction such as shaft speed signal and brake-cylinder pressure signal, brakig force distribution, emergency braking, release of brake, after non-slip interior calculates, delivery valve drive singal and control signal to antiskid valve driver module 2, when occurring abnormal, antiskid valve driver module 2 can be controlled, to cut off respective shaft or all antiskid valve according to demand by control signal; Under normal circumstances, main control module 1 pair of antiskid valve driver module 2 can be assisted to monitor and check simultaneously.Valve driver element 21 receiving valve drive singal in antiskid valve driver module 2, drive pressure retaining valve, blow off valve, launching valve status feedback signal is to main control module 1; Blow off valve protected location 22 receives blow off valve driving condition and control signal, controls to export anti-skidding fail safe energizing signal; Relay control unit 23 reception control signal, life signal and blow off valve protected location 22 output signal, control relay electricity condition the feedback signal sending relay status to main control module 1.
In the present embodiment, main control module 1 also comprises valve drive signal control and protection unit, and in valve drive signal control and protection unit control cock drive singal, the state of blow off valve drive singal and pressure retaining valve drive singal meets default protective condition.The present embodiment is preset protective condition and is specifically comprised: 1. evacuation time must have the function of 5 seconds time-out and anti-skidding punishment of losing efficacy in 80 seconds; 2. do not allow pressure retaining valve dead electricity and blow off valve to obtain electric situation to occur simultaneously, realized the relay protective scheme of above-mentioned two protective conditions by valve drive signal control and protection unit control cock drive singal, thus realize antiskid valve protection.The present embodiment realizes presetting the control logic of protective condition especially by software mode, and mode is simple and be easy to realize.
The present embodiment controls antiskid valve driver module 2 by main control module 1 launching valve drive singal, carry out antiskid valve drived control, by control signal and life signal anti-sliding control monitored simultaneously and protect, thus can failure to the safe side measure in time when fault, anti-sliding control is flexible, and safety and unfailing performance high; The feedback signal simultaneously returned by antiskid valve driver module 2 can also realize fault monitoring and location, when monitoring abnormal, can excise the output of antiskid valve driver module 2 in time, to ensure vehicle safety, and being beneficial to maintenance and the maintenance of field apparatus.
By the life signal sending some cycles, the present embodiment main control module 1 reflects that whether operation is normal, whether antiskid valve driver module 2 can respond main control module 1 fast by this life signal abnormal, thus cut off anti-sliding control when being judged as exception, ensure anti-sliding control safety.The present embodiment life signal is specially the PWM ripple signal of square-wave signal or fixed duty cycle, also can adopt other types signal, and signal type and signal period can set according to the actual requirements.
As shown in Figure 4, in the present embodiment, valve driver element 21 comprises virtual protection circuit 211, buffer circuit 212, pressure retaining valve driving circuit 213 and blow off valve driving circuit 214, and virtual protection circuit 211 connects pressure retaining valve driving circuit 213 and blow off valve driving circuit 214 respectively by buffer circuit 212; In virtual protection circuit 211 control cock drive singal, the state of blow off valve drive singal and pressure retaining valve drive singal meets default protective condition.Pressure retaining valve driving circuit 213 according to pressure retaining valve drive singal drive pressure retaining valve, blow off valve driving circuit 214 according to blow off valve drive singal drive blow off valve, and export respectively pressure retaining valve, blow off valve driving condition feed back signal to main control module 1.
The present embodiment controls blow off valve drive singal and pressure retaining valve drive singal especially by virtual protection circuit 211, does not allow pressure retaining valve dead electricity and blow off valve to obtain and electricly to occur simultaneously, loses excessive to prevent air brake power or loses braking force.Virtual protection circuit 211 can also increase other defencive function according to the actual requirements, better to ensure vehicle safety.
In the present embodiment, pressure retaining valve driving circuit 213, blow off valve driving circuit 214 are metal-oxide-semiconductor driving circuit, are driven the on off state of pressure retaining valve, blow off valve by metal-oxide-semiconductor driving circuit.The present embodiment metal-oxide-semiconductor driving circuit specifically adopts the driving chip carrying the function such as overcurrent protection, open circuit detection, overheat protector, feedback of status; when the testing circuit in driving chip detects that overcurrent, open circuit, excess temperature etc. are abnormal; fault status information is sent by feedback of status pin; thus after main control module 1 receives these Feedback failure informations; by the valve drive signal sent, judge the faulty condition of this driving chip.
In the present embodiment, the mouth of metal-oxide-semiconductor driving circuit is also provided with rectifier diode in case backflow, and TVS (Transient Voltage Suppressor, transient voltage suppresses) diode is to prevent output voltage too high.
As shown in Figure 5, blow off valve protected location 22 comprises the blow off valve output monitoring circuit 221 and protective circuit 222 that connect successively, the input end connection valve driver element 21 of blow off valve output monitoring circuit 221, the mouth of protective circuit 222 connects relay control unit 23; Blow off valve output monitoring circuit 221 monitors the driving condition of blow off valve and reception control signal, according to monitoring the driving condition result and control signal that obtain, controlling starting protection circuit 222 and exporting anti-skidding fail safe energizing signal.The present embodiment monitors the driving condition of blow off valve by blow off valve output monitoring circuit 221, and when the driving condition monitoring blow off valve is abnormal, control protection electric circuit 222 performs anti-skidding fail safe action, ensures that blow off valve controls safety.
See Fig. 5, in the present embodiment, protective circuit 222 comprises the OR circuit, time delay electronic circuit and the maintenance electronic circuit that connect successively, the driving condition result that OR circuit incoming control signal, blow off valve output monitoring circuit 221 monitor, carries out or output protection control signal after computing; Time delay electronic circuit sends energizing signal to keeping electronic circuit under protecting control signal control, after keeping electronic circuit to receive energizing signal, controls export anti-skidding fail safe energizing signal and keep preset duration.By or door, time delay electronic circuit and keep the hardware circuit that forms of electronic circuit, the time length of restriction blow off valve, make there is antiskid valve evacuation time time-out and anti-skidding inefficacys is punished, to perform anti-skidding fail safe.The present embodiment, by protective circuit 222 specific implementation evacuation time 5 seconds time-out and 80 seconds anti-skidding functions of punishing that lost efficacy, also can increase other defencive functions according to the actual requirements.
The present embodiment virtual protection circuit 211, protective circuit 222 realize the protection of antiskid valve by the mode of hardware circuit, in conjunction with the protecting control of valve drive signal control and protection unit in main control module 1, can when relay protective scheme occurs abnormal wherein, another can ensure safe guiding, thus realizes redundancy; When valve drive signal control and protection unit realizes protecting control logic by software mode, can also realize soft and hardware redundancy together with virtual protection circuit 211, protective circuit 222, the mode combined by soft and hardware guarantees that antiskid valve controls safety.
As shown in Figure 6, the present embodiment repeat circuit control unit 23 comprises control circuit 231, first switching valve 232, second switch pipe 233 and relay reactive circuit 234, control circuit 231 connects one end of relay coil by second switch pipe 233, first switching valve 232 connects the other end of described relay coil, the other end of the first switching valve 232 connects described blow off valve protected location 22, by the conducting control relay of the first switching valve 232, second switch pipe 233 electricity condition; Control circuit 231 reception control signal and life signal, control the conducting of second switch pipe 233, and the anti-skidding fail safe energizing signal that the first switching valve 232 exports according to blow off valve protected location 22 controls conducting; Relay reactive circuit 234 output relay obtains the feedback signal of electricity condition.
The present embodiment by arrange in relay coil loop two switch controlled relays electricity condition; two switching valves are positioned over coil front end and rear end respectively; wherein the switching valve (the first switching valve 232) of front end controls whether conducting by the output of protective circuit 222; the switching valve (second switch pipe 233) of rear end controls its conducting by control circuit 231; during the whole conducting of two switching valves; relay coil obtains electric, and relay normally open point closes, normally closed disconnection.When blow off valve protected location 22 exports anti-skidding fail safe energizing signal, disconnect the first switching valve 232, relay coil must not be electric, performs anti-skidding fail safe; When the life signal that control circuit 231 receives is abnormal, disconnect second switch pipe 233, relay coil must not electricity, controls the opening of second switch pipe 233, disconnected state when life signal is normal by control signal; When the first switching valve 232, second switch pipe 233 conducting simultaneously, relay coil obtains electric.Relay circuit by two switch controlled relay coils electricity condition, with when anti-skidding inefficacy or abnormal condition, can pass through the timely block system relay coil power of control two switching valves, the alerting ability of raising anti-sliding control and safety performance.
In the present embodiment, the first switching valve 232, second switch pipe 233 can MOS switching valve, solid-state relay or optocouplers etc., and other also can be selected according to the actual requirements to have the device of similar switching function.
In the present embodiment, relay control unit 23 also comprises the conducting state for monitoring the first switching valve 232 and sends the switching valve observation circuit 235 of feedback signal, and switching valve observation circuit 235 connects the mouth of the first switching valve 232.The supervision of the first switching valve 232 is realized by switching valve observation circuit 235; main control module 1 judges the whether conducting of the first switching valve 232 by feedback signal; with the energy failure to the safe side measure in time when occurring abnormal; thus make (not conform to the situation of relay at safe condition; namely relay coil must not be electric), be convenient to main control module 1 and separately protective circuit 222 checked and monitored.
The present embodiment is returned by antiskid valve driver module 2 and feeds back signal to main control module 1, feedback signal comprises valve driving condition feedback signal, relay obtains electricity condition feedback signal and switching valve monitors feedback signal, then main control module 1 can according to the valve drive signal of feedback signal and transmission, control signal and life signal, each point of valve driver element 21 is detected, to judge state (the such as normal condition residing for valve driver element 21, overcurrent, open circuit, excess temperature etc.) and blow off valve protected location 22, the state of relay control unit 23, and then ensure when the failure to the safe side measure in time of abnormal energy appears in circuit.Feedback signal is monitored when main control module 1 receives switching valve, can in conjunction with control signal, the blow off valve drive singal sending to protective circuit 222 in blow off valve protected location 22, judge that the whether normal and blow off valve driving circuit 214 of the whether conducting of the first switching valve 232, protective circuit 222 exports whether time-out; Main control module 1 receives relay and obtains electricity condition feedback signal, then can in conjunction with control signal, blow off valve drive singal and life signal, judges the whether conducting of the first switching valve 232, whether+24V power supply be that valve-driving circuit exports power supply.
As shown in Fig. 7,8,9; in the specific embodiment of the invention, antiskid valve driver module 2 is two; corresponding 2 blows off valve of each antiskid valve driver module 2 and 2 pressure retaining valves; each antiskid valve driver module 2 comprises two groups of valve anti-sliding control structures of corresponding 4 valves; comprise 4 valve driver elements, 21,2 blow off valve protected locations 22 and 2 relay control units 23, wherein 2 valve driver elements, 21,1 blow off valve protected location 22 and 1 relay control unit 23 are one group.The present embodiment is specifically designed with the same antiskid valve driver module 2 of two groups of functions in the antiskid valve control system often saving car, single antiskid valve driver module 2 completes the drived control of 2 axles, 4 valves, by arranging the identical antiskid valve driver module 2 of two functions, PCB (Printed Circuit Board can be reduced, printed circuit board) design efforts would, reduce corresponding file in flow process, thus the spare unit quantity shortening time-to-market and reduce needed for later stage scene.
See Fig. 7, in the present embodiment, main control module 1 is by a CPU (Central Processor Unit, central processing unit) main control board realization, by a CPU to the driving of 8 valves and control, be convenient to CPU and consistent control is carried out to electromagnetic valve, ensure the promptness controlled simultaneously.The present embodiment CPU specifically adopts DSP, main control module 1 specifically comprises DSP (Digital Signal Processing, digital signal processing) main control unit and FPGA (Field Programmable GateArray, field programmable gate array) monitoring unit, carries out data interaction by parallel bus between DSP main control unit and FPGA monitoring unit; FPGA monitoring unit obtains brakig force distribution instruction, is transferred to DSP main control unit, and monitors the running state of DSP main control unit.DSP main control unit obtains 4 road speed signals by DSP, and simultaneously DSP to power on after normal operation with the transmission 2 road life signal in certain cycle, sends to two antiskid valve driver modules 2 respectively.FPGA monitoring unit obtains the instructions such as brakig force distribution by FPGA from pci bus, and by parallel bus, the command information of acquisition is sent to DSP, DSP, again in conjunction with 4 road speed signals of acquisition, is undertaken analyzing the corresponding 8 road valve control signals of rear transmission, 8 road control signals by the algorithm of inside.8 road valve control signals comprise 4 road blow off valve control signals, No. 4 pressure retaining valve control signals, export 8 valve driver elements 21 respectively to and control driving 4 groups of antiskid valve (4 blows off valve, 4 pressure retaining valves); 8 road control signals comprise 4 road control signals of control 4 blow off valve protected locations 22 and control 4 road control signals of 4 relay control units 23.
Anti-sliding control and anti-skidding function for monitoring are integrated in programmable digital circuit by DSP, FPGA by the present embodiment, one block of 3U plug-in unit is only needed to realize, while meeting circuit function, also there is high integration and high reliability, reduce half compared to traditional 6U or 2 piece of 3U plug-in unit volume that need simultaneously, greatly reduce volume size.
In the present embodiment, main control board receives the feedback signal that antiskid valve driver module 2 returns, feedback signal sends to DSP main control unit by I/O extended chip by I2C bus, if selected dsp chip has abundant I/O pin, then also directly feedback signal can be connected to the pin of dsp chip, I2C bus also can adopt SPI (Serial PeripheralInterface, Serial Peripheral Interface (SPI)) bus or other bus, I2C bus type specifically can be determined by selected I/O extended chip.The present embodiment is a reserved road SPI interface in main control board DSP, for cabinet in simulate plug-in unit and carry out data interaction.
In the present embodiment, main control board is also provided with FLASH and NVsRAM (Non-Volatile Static Random AccessMemory, Nonvolatile static random access memory), in order to record failure message in antiskid valve control process and process data; Main control board is arranged a slice house dog, for monitoring plug-in unit operation level and DSP main control unit, note abnormalities reset DSP, DSP is monitored together with house dog by FPGA, effectively can ensure the normal work of DSP, guarantee that DSP can normally launching valve drive singal and control signal simultaneously; Main control board is also arranged a road ethernet, the remote firmware realizing DSP main control unit upgrades, and also can adopt CAN communication, 485 communication or other signalling methodss.In main control board, the power-supply system of veneer mainly comprises and converts one-board power supply and VCC-S to various power supplys needed for veneer work through protection filtering process or power supply chip, wherein VCC-S is for controlling the power supply that power panel provides in cabinet, and in main control board, the type selecting of front-panel connector, back panel connector and concrete quantity can set according to system requirements.
As shown in Figure 8,9; in the present embodiment valve driver element 21, pressure retaining valve driving circuit 213, blow off valve driving circuit 214 are metal-oxide-semiconductor driving circuit; buffer circuit 212 specifically comprises two-way, and virtual protection circuit 211 connects pressure retaining valve metal-oxide-semiconductor driving circuit and blow off valve metal-oxide-semiconductor driving circuit respectively by a road buffer circuit 212.Pressure retaining valve drive singal is connected on the control pin of pressure retaining valve metal-oxide-semiconductor driving circuit, controls the driver output of pressure retaining valve after directly passing through to carry out isolation processing to buffer circuit 212.Blow off valve drive singal is through the virtual protection process of virtual protection circuit 211; namely forbid pressure retaining valve dead electricity, blow off valve obtains electric situation and occur simultaneously; after carrying out isolation processing by buffer circuit 212 again; be connected on the control pin of blow off valve metal-oxide-semiconductor driving circuit, control the driver output of blow off valve.Metal-oxide-semiconductor driving circuit exports terminating diode D1/D2, and front panel external connector relevant interface connects TVS pipe TS1/TS2, in metal-oxide-semiconductor driving circuit, the external driving power of driving chip is from relay, power vd D introduces from front panel, be connected to often opening or normally closed electric shock of relay, by the control to relay coil, realize the control to driving chip driving power.
In the present embodiment, in the protective circuit 222 of valve driver element 21, time delay electronic circuit is specially 5 seconds time delay electronic circuits, maintenance electronic circuits and is specially 80 seconds maintenance electronic circuits, namely makes antiskid valve evacuation time have 5 seconds time-out and anti-skidding inefficacy punishment in 80 seconds.Exported by blow off valve output monitoring circuit 221 pairs of blow off valve metal-oxide-semiconductor driving circuits and monitor; and monitoring result is fed back to protective circuit 222; if blow off valve metal-oxide-semiconductor driving circuit exports; then blow off valve output monitoring circuit 221 monitors metal-oxide-semiconductor driver output; then feed back the signal of a high level to protective circuit 222; when this high level signal time length is more than or equal to 5 seconds time; 5 seconds time delay electronic circuits will be given 80 seconds and keep electronic circuit to send an energizing signal; after within 80 seconds, keeping electronic circuit to receive this energizing signal, export anti-skidding fail safe energizing signal.
As shown in Figure 8,9, in the present embodiment relay control unit 23, the first switching valve 232, second switch pipe 233 all adopt metal-oxide-semiconductor, are respectively the first metal-oxide-semiconductor V1, the second metal-oxide-semiconductor V2.After keeping electronic circuit to receive energizing signal when 80 seconds, control the first metal-oxide-semiconductor pipe V1 to disconnect, and remain open state 80 seconds, then relay coil loop disconnects, relay coil must not electricity (i.e. relay _+24V must not electricity), and metal-oxide-semiconductor is without driving power (i.e. metal-oxide-semiconductor non-transformer output).Control circuit 231 controls the conducting of the second metal-oxide-semiconductor V2 according to control signal, life signal, and when life signal abnormal (as cycle mal, dutycycle mal or other error state), control circuit 231 directly controls the second metal-oxide-semiconductor V2 and disconnects; When life signal is normal, control circuit 231 will control the second metal-oxide-semiconductor V2 conducting or cut out according to control signal (high level, low level), so control relay coil electric, dead electricity.
The present embodiment antiskid valve driver module 2 receives valve drive signal, the control signal of antiskid valve by back panel connector, and launching valve driving condition feedback signal, switching valve monitor signal and relay feed back signal to DSP, DSP judges the running state of each unit of antiskid valve driver module 2 according to feedback signal.
Above-mentioned just preferred embodiment of the present invention, not does any pro forma restriction to the present invention.Although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention.Therefore, every content not departing from technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should drop in the scope of technical solution of the present invention protection.
Claims (10)
1. for an anti-skidding control device for city rail brake system, it is characterized in that, comprising:
Main control module (1), for receiving speed signal and the braking instruction of axletree, generate corresponding valve drive signal, control signal, for representing the life signal whether operation abnormal, and export to antiskid valve driver module (2), and judge the running state of described antiskid valve driver module (2) according to feedback signal;
Antiskid valve driver module (2), for Anti-slip regulation valve, comprise the valve driver element (21), blow off valve protected location (22) and the relay control unit (23) that connect successively, described valve driver element (21) receives described valve drive signal Anti-slip regulation valve and sends feedback signal, and described blow off valve protected location (23) controls to export anti-skidding fail safe energizing signal according to the output state of blow off valve, described control signal; Described relay control unit (23) obtaining electricity condition and sending feedback signal according to described anti-skidding fail safe energizing signal, control signal and life signal control relay.
2. the anti-skidding control device for city rail brake system according to claim 1; it is characterized in that: described main control module (1) also comprises valve drive signal control and protection unit, the state that described valve drive signal control and protection unit controls blow off valve drive singal and pressure retaining valve drive singal in described valve drive signal meets default protective condition.
3. the anti-skidding control device for city rail brake system according to claim 2, it is characterized in that: described blow off valve protected location (22) comprises the blow off valve output monitoring circuit (221) and protective circuit (222) that connect successively, the input end of described blow off valve output monitoring circuit (221) connects described valve driver element (21), and the mouth of described protective circuit (222) connects described relay control unit (23); Described blow off valve output monitoring circuit (221) monitors the driving condition of blow off valve and receives described control signal; according to monitoring the driving condition result and described control signal that obtain, controlling to start described protective circuit (222) and exporting anti-skidding fail safe energizing signal.
4. the anti-skidding control device for city rail brake system according to claim 3, it is characterized in that: described protective circuit (222) comprises the OR circuit, time delay electronic circuit and the maintenance electronic circuit that connect successively, the driving condition result that described OR circuit accesses described control signal, blow off valve output monitoring circuit (221) monitors, carries out or output protection control signal after computing; Described time delay electronic circuit sends energizing signal to described maintenance electronic circuit under described protecting control signal control, after described maintenance electronic circuit receives energizing signal, controls export anti-skidding fail safe energizing signal and keep preset duration.
5. the anti-skidding control device for city rail brake system according to claim 4, it is characterized in that: described valve driver element (21) comprises virtual protection circuit (211), buffer circuit (212), pressure retaining valve driving circuit (213) and blow off valve driving circuit (214), described virtual protection circuit (211) connects pressure retaining valve driving circuit (213) and blow off valve driving circuit (214) respectively by described buffer circuit (212); The state that described virtual protection circuit (211) controls blow off valve drive singal and pressure retaining valve drive singal in described valve drive signal meets default protective condition.
6. the anti-skidding control device for city rail brake system according to claim 5, is characterized in that: described pressure retaining valve driving circuit (213), blow off valve driving circuit (214) are metal-oxide-semiconductor driving circuit; The mouth of described metal-oxide-semiconductor driving circuit is also provided with rectifier diode in case backflow, and TVS diode is to prevent output voltage too high.
7. according to the anti-skidding control device for city rail brake system in claim 1 ~ 6 described in any one, it is characterized in that: described relay control unit (23) comprises control circuit (231), first switching valve (232), second switch pipe (233) and relay reactive circuit (234), described control circuit (231) connects one end of relay coil by second switch pipe (233), described first switching valve (232) connects the other end of described relay coil, the other end of described first switching valve (232) connects described blow off valve protected location (22), by described first switching valve (232), the conducting control relay of second switch pipe (233) electricity condition, described control circuit (231) receives described control signal and life signal, control the conducting of described second switch pipe (233), the anti-skidding fail safe energizing signal that described first switching valve (232) exports according to described blow off valve protected location (22) controls conducting, described relay reactive circuit (234) output relay obtains the feedback signal of electricity condition.
8. the anti-skidding control device for city rail brake system according to claim 7, is characterized in that: described first switching valve (232), second switch pipe (233) are MOS switching valve, solid-state relay or optocoupler.
9. the anti-skidding control device for city rail brake system according to claim 8, it is characterized in that: described relay control unit (23) also comprises the conducting state for monitoring the first switching valve (232) and sends the switching valve observation circuit (235) of feedback signal, and described switching valve observation circuit (235) connects the mouth of described first switching valve (232).
10. the anti-skidding control device for city rail brake system according to claim 8 or claim 9, it is characterized in that: described main control module (1) comprises DSP main control unit and FPGA monitoring unit, between described DSP main control unit and FPGA monitoring unit, carry out data interaction by parallel bus; Described FPGA monitoring unit obtains braking instruction by core bus, is transferred to described DSP main control unit, and monitors the running state of described DSP main control unit.
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| CN201510449535.1A CN105000007B (en) | 2015-07-28 | 2015-07-28 | A kind of anti-skidding control device for urban rail braking system |
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| CN113767039A (en) * | 2019-04-30 | 2021-12-07 | 法伊韦利传送器意大利有限公司 | System for monitoring the rotation of at least one axle of a railway vehicle or train |
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| CN105000007B (en) | 2018-04-17 |
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