CN112722004A - Urban rail train derailment detection system - Google Patents
Urban rail train derailment detection system Download PDFInfo
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- CN112722004A CN112722004A CN202011563735.7A CN202011563735A CN112722004A CN 112722004 A CN112722004 A CN 112722004A CN 202011563735 A CN202011563735 A CN 202011563735A CN 112722004 A CN112722004 A CN 112722004A
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- Prior art keywords
- derailment detection
- derailment
- eddy current
- train
- urban rail
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning, or like safety means along the route or between vehicles or vehicle trains
Abstract
The invention discloses an urban rail train derailment detection system, which comprises a control unit and a derailment detection equipment unit, wherein the control unit is connected with the derailment detection equipment unit through a cable; the fixing and height adjusting mechanism is connected with the bearing structure through a bolt, and the eddy current sensor is connected with the bearing structure through a bolt. By adopting a non-contact derailment detection method and improving the detection method of the detection device, the detection reliability is improved and the false alarm is avoided by reasonably arranging the detection device on the whole vehicle.
Description
Technical Field
The invention relates to the technical field of urban rail transit, in particular to an urban rail train derailment detection system.
Background
With the acceleration of the urbanization process and the increasing demand of urban transportation, urban rail transit plays an increasingly important role in the field of public transportation. With the development of urban rail transit, the running safety of trains is more and more important, and due to high requirements on running safety, the trains must be equipped with reliable derailment detection devices, but the current derailment detection devices comprise contact type and non-contact type, the contact type derailment detection has the risk of damaging a bogie through collision detection with a rail surface, the non-contact type becomes the leading research direction, and various current non-contact type detection methods have the reliability and the risk of false alarm.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an urban rail train derailing detection system. Adopt novel non-contact derailment detection device, the device adopts the vortex electromagnetic induction mode, and the while is put in order the rational arrangement on the car, promotes the derailment and detects the reliability to avoid the mistake and report.
The technical scheme adopted by the invention is that the urban rail train derailment detection system comprises a control unit and a derailment detection equipment unit, wherein the control unit is connected with the derailment detection equipment unit through a cable, the control unit is arranged in each carriage, the derailment detection equipment unit is arranged on a bogie of each carriage, and the derailment detection equipment unit comprises a fixing and height adjusting mechanism, a bearing structure and an eddy current sensor; the fixing and height adjusting mechanism is connected with the bearing structure through a bolt, and the eddy current sensor is connected with the bearing structure through a bolt.
Further, the derailment detection system is directly or indirectly connected with the train control and management system TCMS and the brake loop line and used for transmitting command information or control commands.
Further, the 1 set of derailment detection system comprises 1 control unit and at least 2 derailment detection equipment units.
Furthermore, derailment detection equipment units are respectively arranged at the front and the rear of wheels in the diagonal direction on the bogie.
Furthermore, the derailment detection equipment unit adopts a non-contact eddy current induction mode to realize detection, the distance between the eddy current sensor and the rail surface of the train is set to be 50 +/-3 mm, and the maximum distance between the eddy current sensor and the rail surface of the train for effective detection is 60 mm.
Furthermore, the induction center of the eddy current sensor is in the same straight line with the longitudinal center of the train rail surface.
Further, eddy current sensor include outside protective housing and inside work magnetic core, the direct protective housing of load-bearing structure passes through bolted connection, the work magnetic core passes through bolted connection with the protective housing, the protective housing material be stereoplasm polytetrafluoroethylene material.
Furthermore, the fixing and height adjusting mechanism comprises a bogie mounting interface board and a derailing detection unit mounting board which are connected by bolts and nuts, the bogie mounting interface board and the derailing detection unit mounting board structurally adopt wedge-shaped tooth structures and are used for connection and interlocking in the vertical direction, and the derailing detection unit mounting board is provided with a kidney-shaped hole for adjusting the vertical elevation of equipment.
The invention has the beneficial effects that: the invention aims to solve the problem of derailment of an urban rail transit train in rail running and provides a detection system for dealing with vehicle derailment, which meets the requirement of safe running of a subway train, in order to prevent accidents caused by derailment.
Drawings
FIG. 1 is a layout view of the installation of a single carriage of the urban rail train derailment detection system of the present invention.
Fig. 2 is a block diagram of an urban rail train derailment detection apparatus according to the present invention.
FIG. 3 is a diagram of a motherboard of a host controller according to the present invention.
Fig. 4 is a left deviation critical diagram of the urban rail train in the non-derailed state according to the invention.
Fig. 5 is a schematic diagram of the eddy current sensor and the center of the rail surface being symmetrical according to the present invention.
Fig. 6 is a rightward deviation threshold diagram of the urban rail train in the non-derailed state according to the present invention.
Fig. 7 is a schematic diagram of the left deviation derailment threshold of the urban rail train according to the invention.
Fig. 8 is a schematic diagram of the right deviation derailment threshold of the urban rail train according to the invention.
The labels in the figure are: the method comprises the following steps of 1-a bogie, 2-a derailment detection equipment unit, 3-a rail wheel, 4-a fixing and height adjusting mechanism, 5-a bearing structure and 6-an eddy current sensor.
Detailed Description
The invention will now be further described with reference to the accompanying drawings, to the details of which the invention is not limited, and which are generally known to those skilled in the art and are intended to be covered by the scope of the invention.
The invention discloses a derailment detection system and a detection method for an urban rail train, wherein the number of derailment detection equipment units 2 of each derailment detection system is changeable, the number is at least 2, the maximum number is 8, and at least one derailment detection equipment unit 2 is respectively arranged on a left group of wheels and a right group of wheels of each carriage, and 4 are taken as an example.
The system comprises 1 control unit and 4 derailment detection equipment units 2, wherein the control unit is arranged in each carriage, and the derailment detection equipment units 2 are respectively arranged on a bogie 1 of each vehicle; the 4 derailment detection equipment units 2 are respectively connected with the control unit by cables; the derailment detection system is directly or indirectly connected with a train control and management system TCMS and a brake loop line and used for transmitting command information or controlling commands; each carriage is provided with a set of derailment detection system, and a plurality of sets of derailment detection systems of the whole train are respectively connected with the train TCMS and the brake loop.
The derailment detection equipment unit 2 comprises a fixing and height adjusting mechanism 4, a bearing structure 5 and an eddy current sensor 6; the fixing and height adjusting mechanism 4 is connected with the bearing structure 5 through a bolt, and the eddy current sensor 6 is connected with the bearing structure 5 through a bolt;
the derailment detection equipment unit 2 adopts a non-contact eddy current induction mode to realize detection, the eddy current derailment detection equipment unit flow sensor keeps a set distance (50 +/-3 mm) with the rail surface, the maximum distance of the eddy current sensor 6 from the effective detection of the rail surface is 60mm, and the eddy current sensor 6 can effectively sense the existence of the rail in normal driving.
As shown in fig. 5, the sensing center of the eddy current sensor 6 is designed to be aligned with the longitudinal center of the rail surface, during normal running of the train, the bogie 1 has a transverse offset relative to the rail, the transverse offset is a fixed value (the offset parameter of a certain train is ± 29.5mm depending on the train), referring to fig. 4 to 8, the eddy current sensor 6 can effectively detect the rail surface within the effective offset range of the bogie 1, in a normal state, the eddy current sensor 6 effectively detects that the effective value of the rail surface is 100%, the effective detection range without derailment but with derailment risk is 20% -100%, the main controller detects the state value of the controlled sensor in real time, when the detection range of a certain sensor is lower than 20%, the main controller judges that single-point derailment exists at the position, and records and stores in real time, when one sensor detection value of two sets of wheels at two sides of the train car of the system is lower than 20%, and the main controller determines that the carriage is derailed, immediately triggers a train brake loop to brake the train emergently, and simultaneously reports monitoring information to a train TCMS system.
Referring to table 1, in order to prevent misjudgment, the system requires that at least two detection points have single-point derailment, and the derailment is judged. The at least two detection points have single-point derailment, and at least one single-point derailment is formed in each group of wheel sets on two sides of the carriage, and the number of the single-point derailment is at least two.
The derailment detection system is installed in a matching mode by taking two bogies 1 in a carriage as a unit, and comprises 4 derailment detection equipment units 2 and 1 main control unit, wherein the main control unit is connected with an eddy current sensor 5 for monitoring the 4 derailment detection equipment units 2 in real time through cables, the 4 derailment detection equipment units 2 are distributed on the carriage in a variety mode, the number of the detection equipment units distributed on wheel groups on two sides of the carriage is required to be equal, and the distribution situation adopted in the position is shown in figure 1, namely, the front wheel and the rear wheel in the diagonal direction on each bogie 1 are respectively arranged;
the conditions for derailment were judged as shown in Table 1
The control unit comprises a first power supply module, a second power supply module, a sensor input board, a sensor processing board, a DI dry contact board, a working back board, a structural chassis and the like; the control unit has the basic functions of on-track detection, self-diagnosis and fault protection, data recording, MVB, DI and EB dry contact points, communication, redundancy, PTU and the like. MVB, DI, EB dry contact and TCMS communicate, transmit the order, state and trouble data. The control unit is connected in series with the whole vehicle brake loop line through an EB (electronic board) dry contact point, so that the derailment detection system can directly control the emergency brake of the vehicle. The host power supply module adopts a double hot standby redundancy architecture, and can realize the power supply redundancy function. When the single power supply fails, the standby power supply can be automatically switched, and the normal work of the system is not influenced during the failure switching. In order to prevent the accident from influencing the running of the vehicle, a single-vehicle fault bypass switch is arranged in a control unit of the derailment detection system, the switch is manually turned, then a main controller shields an emergency braking signal of the vehicle, namely, the derailment alarm is relieved, the brake is relieved, and simultaneously the shielding information is recorded.
The fixing and height adjusting mechanism 4 of the derailment detection equipment unit 2 is used as an intermediate link to effectively connect the bogie 1 with the derailment detection equipment unit 2, the single-group fixing and height adjusting mechanism 4 comprises a bogie 1 mounting interface plate and a derailment detection unit mounting plate which are connected by bolts and nuts, the mounting plate is provided with a waist-shaped hole to realize the adjustment of the upper elevation and the lower elevation of the equipment so as to adapt to the abrasion of wheels, the interface plate and the mounting plate structurally adopt a wedge-shaped tooth structure to realize the connection interlocking in the vertical direction and ensure the stable connection of the bogie mounting interface plate and the derailment detection unit mounting plate,
the eddy current sensor 6 is composed of a protective shell and a working magnetic core, the working magnetic core is arranged in the protective shell, the bearing structure is directly connected with the protective shell of the sensor through bolts, the working magnetic core is connected with the protective shell through bolts, and the protective shell effectively protects the working magnetic core from dust, water and external damage;
the protective shell of the eddy current sensor 6 is made of hard polytetrafluoroethylene material, the material is fatigue resistant, aging resistant, high temperature resistant, corrosion resistant and the like, meanwhile, the material has certain brittleness and is easy to be crushed by collision or extrusion, when the eddy current sensor 6 of the derailment detection equipment unit 2 is passively contacted with a foreign object to be extruded or collided due to a special condition in the running process of a train, the protective shell of the eddy current sensor 6 can be completely crushed in time, so that the sensor structure body is separated from the steel bearing structure body, a limited space is reserved for the extrusion or the collision from the bottom, thereby limited alleviate the structural body of collision damage derailment detection unit, more importantly prevent that the collision force from further transmitting to bogie 1 through the structural body of derailment detection equipment unit 2, lead to the collision damage to compromise bogie 1, consequently can play limited guard action. The eddy current sensor 6 is provided with a working indicator light for displaying the working state of the sensor, and the indicator light is normally on under the normal working state, which indicates that the derailment detection sensor normally works on the track. And if the working magnetic core in the derailing detection sensor does not work or cannot detect the track, the indicating lamp is not on.
Claims (8)
1. Urban rail train derailment detecting system, its characterized in that: the derailment detection device comprises a control unit and a derailment detection device unit, wherein the control unit is connected with the derailment detection device unit through a cable, the control unit is arranged in each carriage, the derailment detection device unit is arranged on a bogie of each carriage, and the derailment detection device unit comprises a fixing and height adjusting mechanism, a bearing structure and an eddy current sensor; the fixing and height adjusting mechanism is connected with the bearing structure through a bolt, and the eddy current sensor is connected with the bearing structure through a bolt.
2. The urban rail train derailment detection system according to claim 1, wherein: the derailment detection system is directly or indirectly connected with the train control and management system TCMS and the brake loop line and is used for transmitting instruction information or control commands.
3. The urban rail train derailment detection system according to claim 1, wherein: the 1 set of derailment detection system comprises 1 control unit and at least 2 derailment detection equipment units.
4. The urban rail train derailment detection system according to claim 1, wherein: and derailment detection equipment units are respectively arranged in front of and behind wheels in the diagonal direction on the bogie.
5. The urban rail train derailment detection system according to claim 1, wherein: the derailment detection equipment unit adopts a non-contact eddy current induction mode to realize detection, the distance between the eddy current sensor and the rail surface of the train is set to be 50 +/-3 mm, and the maximum distance between the eddy current sensor and the rail surface of the train for effective detection is 60 mm.
6. The urban rail train derailment detection system according to claim 5, wherein: the induction center of the eddy current sensor and the longitudinal center of the train rail surface are on the same straight line.
7. The urban rail train derailment detection system according to claim 5, wherein: the eddy current sensor comprises an external protective shell and an internal working magnetic core, the direct protective shell of the bearing structure is connected through a bolt, the working magnetic core is connected with the protective shell through a bolt, and the protective shell is made of hard polytetrafluoroethylene materials.
8. The urban rail train derailment detection system according to claim 1, wherein: the fixing and height adjusting mechanism comprises a bogie mounting interface board and a derailing detection unit mounting board which are connected by bolts and nuts, the bogie mounting interface board and the derailing detection unit mounting board structurally adopt a wedge-shaped tooth structure and are used for connection and interlocking in the vertical direction, and a waist-shaped hole is formed in the derailing detection unit mounting board and is used for adjusting the upper elevation and the lower elevation of equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011563735.7A CN112722004A (en) | 2020-12-25 | 2020-12-25 | Urban rail train derailment detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011563735.7A CN112722004A (en) | 2020-12-25 | 2020-12-25 | Urban rail train derailment detection system |
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| CN112722004A true CN112722004A (en) | 2021-04-30 |
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| CN202011563735.7A Pending CN112722004A (en) | 2020-12-25 | 2020-12-25 | Urban rail train derailment detection system |
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Citations (6)
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| WO2002029274A1 (en) * | 2000-09-30 | 2002-04-11 | Spectra Products Inc. | Wear monitoring apparatus for air brake system |
| CN101298253A (en) * | 2008-06-23 | 2008-11-05 | 哈尔滨工业大学 | Wheel sensor |
| CN102837709A (en) * | 2012-08-30 | 2012-12-26 | 北京交通大学 | Detection device used on heavy haul railway empty vehicle derailment early warning system |
| CN106004927A (en) * | 2016-06-17 | 2016-10-12 | 吉林瑞电科技有限公司 | Obstacle detection device for rail vehicle |
| CN110682935A (en) * | 2019-08-22 | 2020-01-14 | 张明宇 | Integrated obstacle detection and derailment detection system |
| CN210852486U (en) * | 2019-10-28 | 2020-06-26 | 湖南励诚轨道交通科技有限公司 | Non-contact train derailing detection device and train |
-
2020
- 2020-12-25 CN CN202011563735.7A patent/CN112722004A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002029274A1 (en) * | 2000-09-30 | 2002-04-11 | Spectra Products Inc. | Wear monitoring apparatus for air brake system |
| CN101298253A (en) * | 2008-06-23 | 2008-11-05 | 哈尔滨工业大学 | Wheel sensor |
| CN102837709A (en) * | 2012-08-30 | 2012-12-26 | 北京交通大学 | Detection device used on heavy haul railway empty vehicle derailment early warning system |
| CN106004927A (en) * | 2016-06-17 | 2016-10-12 | 吉林瑞电科技有限公司 | Obstacle detection device for rail vehicle |
| CN110682935A (en) * | 2019-08-22 | 2020-01-14 | 张明宇 | Integrated obstacle detection and derailment detection system |
| CN210852486U (en) * | 2019-10-28 | 2020-06-26 | 湖南励诚轨道交通科技有限公司 | Non-contact train derailing detection device and train |
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| 曹润国: "一种新型有源车轮传感器的研究与应用", 《铁道车辆》 * |
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Application publication date: 20210430 |
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