CN112193282B - Emergency bypass fault detection circuit and method, rail transit vehicle and control system - Google Patents
Emergency bypass fault detection circuit and method, rail transit vehicle and control system Download PDFInfo
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- CN112193282B CN112193282B CN202011119253.2A CN202011119253A CN112193282B CN 112193282 B CN112193282 B CN 112193282B CN 202011119253 A CN202011119253 A CN 202011119253A CN 112193282 B CN112193282 B CN 112193282B
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- emergency
- control unit
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- emergency bypass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
- B61L27/50—Trackside diagnosis or maintenance, e.g. software upgrades
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses an emergency bypass fault detection circuit, an emergency bypass fault detection method, a rail transit vehicle and a control system. In order to ensure safe and reliable emergency braking action, when the microcomputer control unit fails, an emergency bypass independent of the microcomputer control unit is designed, the automatic brake controller is operated to realize mechanical air exhaust of a train pipe at an emergency braking position, meanwhile, a hard wire circuit is designed to control the relay to be electrified, the electromagnetic valve of the emergency bypass is electrified, a brake cylinder is switched on, the neutral electromagnetic valve is electrified, an air supplement passage of the train pipe is cut off, and the whole train reaches a braking state. The method can reliably detect the working state of the emergency bypass in real time when the automatic brake controller is arranged at the emergency brake position, thereby reducing the potential safety hazard.
Description
Technical Field
The invention relates to the field of rail transit, in particular to an emergency bypass fault detection circuit and method, a rail transit vehicle and a control system.
Background
At present, a locomotive braking system performs emergency braking when power is on, the emergency braking is triggered by a multi-channel triggering source such as pressing an emergency braking (emergency braking) button, operating an automatic braking controller to set an emergency braking position, sending an emergency braking signal by an ATP system, pulling a pilot valve and the like, and in order to ensure high reliability and high safety of the emergency braking, the locomotive and a train are safely stopped under emergency conditions, and the application of the emergency braking is also realized by adopting a redundant design mode of multi-channel circuit control and air circuit control. The emergency bypass electromagnetic valve is connected with the main air cylinder and the brake cylinder, when the emergency bypass electromagnetic valve is electrified, the main air charges the brake cylinder to generate brake pressure, the brake cylinder is braked, the vehicle neutral electromagnetic valve is electrified, an air supplementing passage of a train pipe is cut off, and the whole train achieves a brake state. And when the electromagnetic valve is powered off, the air charging passage of the main air to the brake cylinder is cut off, the passage of the brake cylinder exhausting air is opened, and the pressure of the brake cylinder is exhausted to the atmosphere to relieve.
Because the passage of the hard-line control relay of the emergency braking position of the automatic braking controller is a hot standby redundant control passage of the emergency braking, whether the redundant bypass really functions or not can not be judged when the microcomputer control unit is normal, and when the microcomputer control unit fails, the emergency braking bypass also fails, although the train pipe can be subjected to pressure reduction braking when the automatic braking controller is operated at the emergency position, the locomotive brake cylinder cannot be braked for the first time, and certain potential safety hazards exist. Therefore, it is particularly important to detect whether the automatic brake controller controls the emergency bypass brake path to be normal at the emergency brake position in real time, and if an emergency bypass fault is found in the locomotive servicing five-step brake test process, an alarm should be given in a cab display device to maintain in time, so that potential safety hazards are avoided.
Disclosure of Invention
The invention aims to solve the technical problem that aiming at the defects of the prior art, the invention provides the emergency bypass fault detection circuit, the method, the rail transit vehicle and the control system, when the automatic brake controller is arranged at an emergency brake position, the emergency bypass working state can be detected in real time, and the potential safety hazard is reduced.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an emergency bypass fault hard line detection circuit comprising:
a microcomputer control unit;
the automatic brake controller is connected with the first input end of the microcomputer control unit and a coil of the relay; the output end of the microcomputer control unit is connected with the emergency bypass electromagnetic valve; one end of a contact of the relay is connected in parallel between the output end of the microcomputer control unit and the emergency bypass electromagnetic valve.
The detection circuit provides a hardware basis for realizing real-time detection of the working state of the emergency bypass, and is simple in structure, low in cost and high in practicability.
The relay comprises two contacts; the first contact and the second contact are connected in parallel between the output end of the microcomputer control unit and the emergency bypass electromagnetic valve, and the second contact is connected with the second input end of the microcomputer control unit. The two contacts are mutually redundant, and the reliability of the relay contact is ensured.
The invention also provides a rail transit vehicle which comprises the detection circuit.
As an inventive concept, the invention also provides a method for realizing the detection of the emergency bypass fault of the locomotive brake by using the detection circuit, which comprises the following steps:
1) Placing the automatic brake controller in an emergency braking position; when the first input end of the microcomputer control unit is changed from low level to high level, delaying t1 to enable the output end of the microcomputer control unit to output high level;
2) In the time t2, if the first input end of the microcomputer control unit is at a high level, the output end of the microcomputer control unit is at a low level and the second input end of the microcomputer control unit is at a high level, the emergency bypass path has no fault; in the time t2, if the first input end is at a high level, the output end is at a low level, and the second input end is at a low level, the emergency bypass path has a fault; wherein t1 and t2 are set time.
The invention utilizes the microcomputer control unit to output the output end at a certain time when the emergency brake is delayed, and the real-time output time difference of the hard wire control relay (namely the relay) to detect whether the input point 2 (the second input end) is normal or not, and further judge whether the emergency bypass path is in fault or not.
In the present invention, t1> t2. The power on/off of the electromagnetic valve is controlled by the output of the microcomputer control unit and also controlled by a hard line of an emergency position of the brake controller, if the situation that the hard line channel is not in fault is detected, the situation that the electromagnetic valve is controlled by the hard line can be detected only by checking the power on of the electromagnetic valve when the microcomputer control unit does not output the power, therefore, the application sets two delay times, and the first delay time t1 is longer than the second delay time t2.
In order to prompt drivers and passengers to maintain timely when a fault occurs, the detection method further comprises the following steps:
3) When the emergency bypass path fails, a fault code is sent to the cab display device.
As an inventive concept, the invention also provides a rail transit vehicle control system, which comprises at least two input ends and a first output end; the first input end is connected with the automatic brake controller; the automatic brake controller is connected with a coil of the relay; the first output end is connected with an emergency bypass electromagnetic valve; and the second input end and one end of the relay contact are connected in parallel between the first output end and the emergency bypass electromagnetic valve.
The relay comprises two contacts; one end of the first contact and one end of the second contact are connected in parallel between the first output end and the emergency bypass electromagnetic valve, and the second contact is connected with the second input end.
Compared with the existing structure, the control system provided by the invention is additionally provided with the relay, can detect the working state of the emergency bypass in real time on the premise of not increasing the complex structure and excessive cost, and has the advantages of low cost and strong practicability.
When the automatic brake controller is arranged at an emergency brake position and the first input end is changed from a low level to a high level, delaying t1 to enable the output end to output the high level; in the time t2, if the first input end is at a high level, the output end is at a low level and the second input end is at a high level, the emergency bypass passage of the train has no fault; in the time t2, if the first input end is at a high level, the output end is at a low level, and the second input end is at a low level, the emergency bypass path of the train has a fault; wherein t1 and t2 are set time.
The control system can detect the working state of the emergency bypass in real time when the automatic brake controller is arranged at the emergency braking position, so that the brake cylinder of the locomotive is switched on at the first time, and potential safety hazards are reduced.
The control system of the present invention further comprises a second output; the second output end is connected with cab display equipment; when an emergency bypass path fails, a fault code is sent to the cab display device.
The display equipment of the cab can prompt faults, and drivers and passengers can maintain the equipment conveniently in time.
Compared with the prior art, the invention has the following beneficial effects:
1. the circuit of the invention has simple structure, safe use, high reliability, low cost and strong practicability;
2. according to the method, when the automatic brake controller is arranged at the emergency brake position, the working state of the emergency bypass can be reliably detected in real time, so that potential safety hazards are reduced;
3. the detection method can detect whether the detection path of the automatic brake controller-relay-electromagnetic valve-input point is failed or not when the emergency brake is performed, and if the detection path is failed, the fault code is sent to the display equipment to prompt drivers and passengers to maintain in time, so that the safety and the reliability of the emergency brake of the brake are improved.
Drawings
FIG. 1 is a schematic diagram of a detection circuit according to an embodiment of the present invention;
FIG. 2 is a flowchart of a detection method according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the detection circuit of embodiment 1 of the present invention includes a microcomputer control unit 4, an automatic brake controller 1, a relay, and an emergency bypass solenoid valve 3.
A microcomputer control unit: the method comprises the steps of collecting brake state information including position signals of an automatic brake controller, processing the position signals through control logic (the specific control logic is shown in embodiment 3), and outputting corresponding signals.
An automatic braking controller: the automatic brake controller is operated to be arranged at different positions, and the braking and relieving functions of the whole train are realized. The emergency braking position of the automatic braking controller is provided with a train pipe exhaust valve port, which can cause the emergency braking of the whole train.
A relay: in the embodiment, a voltage type relay is adopted, and a coil 2 of the relay is controlled by an emergency braking position hard line of an automatic braking controller.
Emergency bypass solenoid valve: the emergency bypass electromagnetic valve is electrified, the brake cylinder of the locomotive is switched on (the pressure is the pressure of the emergency brake cylinder), the electromagnetic valve is not electrified, and the brake cylinder pressure generated by the emergency bypass is relieved. The power on and off of the electromagnetic valve is controlled by the microcomputer control unit and is controlled by a normally open contact of the relay.
As shown in fig. 1, the microcomputer control unit collects an emergency braking position signal of the automatic braking controller and sends the signal to an input point 1 (a first input end), after an emergency braking state is judged, the corresponding electromagnetic valve of the vehicle is controlled to be powered off, so that the brake cylinder is switched on, and meanwhile, the output point 1 (an output end, namely a first output end) controls the emergency bypass electromagnetic valve to be powered on, so that a bypass gas circuit is conducted, and the brake cylinder is controlled to be switched on. When the automatic brake controller is in an emergency braking position, the hard wire controls the relay to be electrified, so that the normally open contact of the relay is closed, the emergency bypass electromagnetic valve is directly controlled to be electrified, bypass air circuit control is conducted, and the states of the relay contact and the electromagnetic valve are fed back to the microcomputer control unit input point 2 (a second input end). In order to ensure the reliability of the relay contact, two normally open contacts are adopted for wiring, and as long as one contact is normal, the bypass emergency brake can be normally applied.
Corresponding to embodiment 1, embodiment 2 of the present invention provides a rail transit vehicle including the detection circuit of embodiment 1.
Specifically, as shown in fig. 2, when the automatic brake controller is operated in the emergency braking position, embodiment 3 of the present invention is implemented as follows:
1) The microcomputer control unit collects that the input point 1 is changed from low level to high level, and starts to time t1, so that the output point 1 outputs high level.
2) The relay is electrified, and the normally open contact 1-2 or the normally open contact 3-4 is closed.
3) And in the time t2, the input point 1 is at a high level, the output point 1 is at a low level, and when the input point 2 is detected to be at a high level, the emergency bypass brake relay path and the contact path thereof have no fault.
4) And in the time t2, the input point 1 is at a high level, the output point 1 is at a low level, and when the input point 2 is detected to be at a low level, the emergency bypass brake relay path and the contact path thereof have faults. And storing fault information, sending the fault to cab display equipment, and prompting drivers and passengers on a main interface, emergently bypassing the fault of the relay and maintaining in time.
Where t1> t2.
In embodiment 3 of the present invention, t1 may be set to 500ms, and t2 may be set to 300ms, or t1 may be set to 700ms, and t2 may be set to 500ms.
The locomotive brake related to the embodiment 4 of the invention adopts a microcomputer control unit (control system), outputs corresponding signals through logic processing after receiving emergency braking signals, enables a brake cylinder of the locomotive to be braked, and enables a train pipe to conduct emergency air exhaust to realize emergency braking of the whole train. In order to ensure that the emergency braking action is safe and reliable, when the microcomputer control unit fails, the automatic braking controller is operated to realize mechanical air exhaust of the train pipe at the emergency braking position, meanwhile, the relay is controlled to be electrified by a hard wire circuit, the emergency bypass electromagnetic valve is electrified, the brake cylinder is braked, the neutral electromagnetic valve is electrified, the air supplementing passage of the train pipe is cut off, and the whole train reaches the braking state.
Specifically, the control system according to embodiment 4 of the present invention includes two input terminals and a first output terminal; the first input end (input point 1) is connected with the automatic brake controller 1; the automatic brake controller is connected with one end of a coil 2 of the relay; the first output end (output point 1) is connected with one end of the emergency bypass electromagnetic valve; the second input end is connected between the first output end and the emergency bypass electromagnetic valve in parallel, one ends of two contacts of the relay are connected between the first output end and the emergency bypass electromagnetic valve in parallel, and the second contact is connected with the second input end. As can be seen from the combination of FIG. 1, the other end of the relay coil and the other end of the emergency bypass solenoid valve are both connected with a vehicle 0V line, and the other ends of the two contacts of the relay are connected with a vehicle DC110V bus.
Claims (9)
1. An emergency bypass fault hard line detection circuit, comprising:
a microcomputer control unit;
the automatic brake controller is connected with the first input end of the microcomputer control unit and a coil of the relay; the output end of the microcomputer control unit is connected with the emergency bypass electromagnetic valve; the second input end of the microcomputer control unit and one end of the contact of the relay are connected in parallel between the output end of the microcomputer control unit and the emergency bypass electromagnetic valve;
placing the automatic brake controller in an emergency braking position; when the first input end of the microcomputer control unit is changed from low level to high level, delaying t1 to enable the output end of the microcomputer control unit to output high level;
in the time t2, if the first input end of the microcomputer control unit is at a high level, the output end of the microcomputer control unit is at a low level and the second input end of the microcomputer control unit is at a high level, the emergency bypass path has no fault; in the time t2, if the first input end is at a high level, the output end is at a low level, and the second input end is at a low level, the emergency bypass path has a fault;
wherein t1 and t2 are set time.
2. The emergency bypass fault hard wire detection circuit of claim 1, wherein the relay comprises two contacts; the first contact and the second contact are connected in parallel between the output end of the microcomputer control unit and the emergency bypass electromagnetic valve, and the second contact is connected with the second input end of the microcomputer control unit.
3. A rail transit vehicle characterised in that it comprises a detection circuit according to claim 1 or 2.
4. A method for detecting an emergency bypass fault of a locomotive brake by using the detection circuit of any one of claims 1 to 3, comprising:
1) Placing the automatic brake controller in an emergency braking position; when the first input end of the microcomputer control unit is changed from low level to high level, delaying t1 to enable the output end of the microcomputer control unit to output high level;
2) In the time t2, if the first input end of the microcomputer control unit is at a high level, the output end of the microcomputer control unit is at a low level and the second input end of the microcomputer control unit is at a high level, the emergency bypass path has no fault; in the time t2, if the first input end is at a high level, the output end is at a low level, and the second input end is at a low level, the emergency bypass path has a fault;
wherein t1 and t2 are set time.
5. The method of claim 4, wherein t1> t2.
6. The method of claim 4 or 5, further comprising:
3) When the emergency bypass path fails, a fault code is sent to the cab display device.
7. A rail transit vehicle control system is characterized by comprising at least two input ends and a first output end; the first input end is connected with the automatic brake controller; the automatic brake controller is connected with a coil of the relay; the first output end is connected with an emergency bypass electromagnetic valve; the second input end and one end of the relay contact are connected in parallel between the first output end and the emergency bypass electromagnetic valve; when the automatic brake controller is arranged at an emergency brake position and the first input end is changed from a low level to a high level, delaying t1 to enable the output end to output the high level; in the time t2, if the first input end is at a high level, the output end is at a low level, and the second input end is at a high level, the emergency bypass passage of the train has no fault; in the time t2, if the first input end is at a high level, the output end is at a low level, and the second input end is at a low level, the emergency bypass path of the train has a fault; wherein t1 and t2 are set time.
8. The rail transit vehicle control system of claim 7, wherein the relay includes two contacts; one end of the first contact and one end of the second contact are connected in parallel between the first output end and the emergency bypass electromagnetic valve, and the second contact is connected with the second input end.
9. The rail transit vehicle control system of claim 7, further comprising a second output; the second output end is connected with cab display equipment; when an emergency bypass path fails, a fault code is sent to the cab display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011119253.2A CN112193282B (en) | 2020-10-19 | 2020-10-19 | Emergency bypass fault detection circuit and method, rail transit vehicle and control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011119253.2A CN112193282B (en) | 2020-10-19 | 2020-10-19 | Emergency bypass fault detection circuit and method, rail transit vehicle and control system |
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| CN112193282A CN112193282A (en) | 2021-01-08 |
| CN112193282B true CN112193282B (en) | 2022-11-18 |
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| CN114475553B (en) * | 2022-01-14 | 2024-07-05 | 中国铁道科学研究院集团有限公司 | Emergency braking hard line control method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ATE499259T1 (en) * | 2006-12-13 | 2011-03-15 | Schweizerische Bundesbahnen Sbb | BRAKE DEVICE WITH EMERGENCY BRAKE AND EMERGENCY BRAKE BYPASS FUNCTION |
| DE102009051019A1 (en) * | 2009-10-28 | 2011-05-05 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Emergency braking device of a rail vehicle |
| CN203126827U (en) * | 2013-04-01 | 2013-08-14 | 广州市地下铁道总公司 | Emergency brake safety interlock circuit of rail transit vehicle |
| CN109080614B (en) * | 2018-08-22 | 2021-03-26 | 中车株洲电力机车有限公司 | Fault processing method, system and equipment for emergency braking loop |
| CN210129024U (en) * | 2019-03-20 | 2020-03-06 | 日立汽车系统(苏州）有限公司 | Load diagnosis device |
| CN110053600B (en) * | 2019-04-28 | 2020-08-25 | 中车株洲电力机车有限公司 | Rail locomotive braking system and emergency redundant access detection method thereof |
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Effective date of registration: 20220801 Address after: 266012 south side of Xinye road and west side of Herong Road, Qingdao high tech Industrial Development Zone, Qingdao, Shandong Province Applicant after: CRRC Brake System Co.,Ltd. Address before: 412001 Tianxin garden in Shi Feng District, Zhuzhou, Hunan Applicant before: CRRC ZHUZHOU LOCOMOTIVE Co.,Ltd. |
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