CN112550365A - Step type safety control curve design method for tramcar overspeed safety protection - Google Patents
Step type safety control curve design method for tramcar overspeed safety protection Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0018—Communication with or on the vehicle or train
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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 trains
- B61L23/08—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in one direction only
- B61L23/14—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in one direction only automatically operated
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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
- B61L27/70—Details of trackside communication
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06—COMPUTING; CALCULATING OR COUNTING
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Abstract
The invention relates to a step-type safety control curve design method for overspeed safety protection of a tramcar, which comprises the following steps: the train-mounted equipment acquires a safe speed-limiting starting position, a speed-limiting terminal point and a speed-limiting value of civil engineering in front of a line through a speed-limiting responder group on the line; the speed of the train reaching the small curve radius does not exceed the safe speed limit by adding the middle step-by-step safe speed limit in front of the small curve of the line. Compared with the prior art, the invention has the advantages of realizing the safe speed monitoring of the running train, realizing the smooth transition of the speed when the train continuously passes through a plurality of speed-limiting sections in front, realizing the comfort level of the running train and the like.
Description
Technical Field
The invention relates to a step type safety control curve design method for tramcar overspeed safety protection, in particular to a step type safety control curve design method for tramcar overspeed safety protection.
Background
Tramcars mostly run on open ground roads, and mainly ensure driving safety by visual driving of drivers, but the running safety of tramcars in special environments (such as curves, tunnels and the like) can be influenced by external objective environments, so that potential safety hazards of overspeed and derailment can be brought to operation, and in order to reduce the potential safety hazards, safety control equipment for overspeed protection is necessary to be equipped for the tramcars.
The existing urban rail transit industry speed monitoring technology used for tramcar projects has the following disadvantages:
1) the existing subway scheme needs to monitor the speed of the whole line, so that larger data manufacturing workload and cost can be brought, and the requirement of low-cost construction of tramcars can not be met;
2) the existing subway scheme is based on vehicle-mounted line maps for speed monitoring, and interconnection and intercommunication of trams are not convenient to realize.
Therefore, the current tramcar industry is still blank in the technical field of speed safety protection, and therefore, the design of a safety control method for tramcar overspeed safety protection becomes a technical problem to be solved at present.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a step-type safety control curve design method for the overspeed safety protection of a tramcar.
The purpose of the invention can be realized by the following technical scheme:
according to one aspect of the invention, a step-type safety control curve design method for overspeed safety protection of a tramcar is provided, which comprises the following steps:
the train-mounted equipment acquires a safe speed-limiting starting position, a speed-limiting terminal point and a speed-limiting value of civil engineering in front of a line through a speed-limiting responder group on the line;
the speed of the train reaching the small curve radius does not exceed the safe speed limit by adding the middle step-by-step safe speed limit in front of the small curve of the line.
As a preferred technical scheme, the speed limit transponder group stores three groups of speed limit data, namely PSR1, PSR2 and PSR3, wherein PSR3 is the actual safety speed limit of civil engineering, and PSR1 and PSR2 are intermediate safety speed limits added in front of PSR 3.
As a preferable technical scheme, when the train passes through the transponder group, the vehicle-mounted equipment simultaneously reads three pieces of speed limit information of PSR1, PSR2 and PSR 3.
As a preferred technical scheme, each speed limit message consists of three parts of contents, namely a speed limit starting coordinate, a speed limit length and a safety speed limit value;
the safety speed limit value of the PSR1 is greater than that of the PSR2, and the safety speed limit value of the PSR2 is greater than that of the PSR 3.
As a preferable technical scheme, the vehicle-mounted equipment monitors the actual speed of the train according to three safety speed limits of PSR1, PSR2 and PSR3 in sequence.
As a preferable technical scheme, when the train enters the PSR1 speed limit area, if the actual train speed is larger than a set value, the vehicle-mounted equipment sends an alarm, a service brake SB or an emergency brake EB command to the train, and the train is ensured to decelerate and not to cross the safe speed limit value of the area.
As an optimal technical scheme, the design of step-by-step speed limiting can realize that the train does not overspeed before approaching or entering a final safety speed limiting area, namely the train can normally brake at a reduced speed before entering a front safety speed limiting area, and the train is ensured not to overspeed after entering the safety speed limiting area.
As a preferable technical solution, the PSR curve is formed by the three pieces of speed limit information of PSR1, PSR2, and PSR3 stored in the speed limit transponder group.
As a preferable technical scheme, the final vehicle control curve is approximately parallel to the PSR curve, a set difference exists between the final vehicle control curve and the PSR curve in the speed limit value at the same position, and the speed of the final vehicle control curve at the same position is smaller than that of the PSR curve.
As a preferable technical scheme, the speed limit values of the PSR1, the PSR2 and the PSR3 are obtained by design and simulation calculation according to the actual operation efficiency requirement.
Compared with the prior art, the invention has the following advantages:
1) according to the method, based on vehicle-mounted and trackside point-type communication, a civil engineering safety speed limit in front is obtained, a safety protection reference curve of the train running speed is comprehensively calculated by combining the vehicle braking rate and the reaction time of each link, the train is ensured not to exceed the safety running speed according to the safety protection curve, and the train operation safety is ensured;
2) the invention adopts the step-type safe train control curve, thereby not only realizing the safe speed monitoring of the running train, but also realizing the smooth transition of the speed and the comfort level of the train running when the train continuously passes through a plurality of speed-limiting sections in front;
3) the invention can deploy the function at the line position needing speed protection according to the requirements of engineering projects, avoids the limitation that the ATP of the subway has to carry out speed monitoring on the whole line, and meets the operation characteristics that the visual driving of a driver is the main part and the speed safety protection of a system is the main part of a special road section of the tramcar;
4) according to the invention, the speed monitoring of the whole line is not needed, so that a large amount of data manufacturing work is saved, the project workload is reduced, and the requirement of low-cost construction of the tramcar is met;
5) the invention is based on point type communication, realizes speed monitoring within a relative distance range, and can conveniently realize the interconnection and intercommunication of the tramcar as long as the vehicle-mounted equipment and the trackside transponder meet a set communication protocol.
Drawings
FIG. 1 is a schematic overall design of the present invention;
FIG. 2 is a schematic diagram of the ATP step speed-limiting curve design according to the present invention;
FIG. 3 is a schematic view of a restricted speed zone in front of a train in accordance with the present invention;
fig. 4 is a schematic diagram of the division and design of the progressive speed limit zone according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
In order to reduce the potential safety hazard in the prior art and equip a tramcar with safety control equipment for overspeed protection, the invention only equips a vehicle with Chengdu No. 2 line project with an overspeed protection safety control system in the current domestic open line, and the system is developed by the company.
The overspeed protection safety control system is based on vehicle-mounted and trackside point type communication, acquires the civil engineering safety speed limit in front, and comprehensively calculates a safety protection reference curve of the train running speed by combining the vehicle braking rate and the reaction time of each link, and ensures that the train does not exceed the safety running speed according to the safety protection curve, thereby ensuring the operation safety of the train.
When a train runs on a line, the civil engineering speed limit of the line cannot be exceeded, otherwise, the risk of derailment and derailment exists, the train-mounted equipment acquires the safety speed limit starting position, the speed limit terminal point and the speed limit value of civil engineering in front of the line through a point type transponder on the line, and the train-mounted equipment monitors the speed accordingly.
As shown in fig. 1, the speed limit at the small curve radius of the front route is B3km/h, and in order to ensure that the speed of the train reaching the small curve radius does not exceed the safety speed limit B3km/h, the train speed needs to be controlled by the vehicle-mounted equipment in advance, so that the aim is achieved by adding intermediate step-by-step safety speed limits in front of the small curve of the route, specifically, the following steps are included:
1) the speed limit transponder group stores 3 groups of speed limit data, namely PSR1, PSR2 and PSR3, wherein PSR3 is the actual safety speed limit of civil engineering, namely the safety speed limit which can not be broken through by the train at last.
2) When the train passes through the transponder group, the vehicle-mounted equipment simultaneously reads three speed limit information of PSR1, PSR2 and PSR3, wherein each speed limit information consists of three parts, namely a speed limit starting coordinate, a speed limit length and a safety speed limit value.
3) The vehicle-mounted equipment monitors the actual speed of the train according to three safety speed limits of PSR1, PSR2 and PSR3 in sequence, and when the actual train speed is greater than a certain value when the train enters the PSR1 speed limit area of the figure 1, the vehicle-mounted equipment sends an alarm, a Service Brake (SB) or an Emergency Brake (EB) command to the train to ensure that the train does not slow down and cross the safety speed limit.
4) The design of gradual speed limiting can realize that the train does not overspeed before approaching or entering the final safety speed limiting area, namely the train can normally brake at a reduced speed before entering the front safety speed limiting area, and the train is ensured not to overspeed after entering the safety speed limiting area.
5) As shown in fig. 2 below, the PSR curve corresponds to the speed limit data in the transponder group, and the "Service braking curve to reach final PSR" curve is an actual reference curve for controlling the speed of the train, and the train running according to the reference curve can enter the front speed limit zone according to the specified speed and comfort level.
6) The slope of an actual train control reference curve is directly influenced by different speed limit values of each stage in the stepped speed limit, so that the actual running speed, time and efficiency of the train are influenced, the specific speed limit value of each stage needs to be designed and subjected to simulation calculation according to the actual operation efficiency requirement, and finally, the optimal speed limit stage is obtained.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Scene description: the train has a small curve line in front of the running, the speed limit is 30km/h, and the following figure 3 shows that:
before entering the speed-limiting area, the train can run at the highest speed 70 of the vehicle or the civil engineering, and the safety braking distance table at different speeds is calculated according to the initial highest speed limit and the train braking rate.
Two intermediate speed limit areas are designed in a speed range of [70km/h,30km/h ] according to a safety braking distance table under different speeds, and the length of each stage of speed limit area is respectively calculated, as shown in the following figure 4:
and finally, burning the calculated intermediate speed limit information (speed limit starting coordinates, speed limit length and speed limit value) into a responder group for the vehicle-mounted equipment to read and apply.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A step type safety control curve design method for overspeed safety protection of a tramcar is characterized by comprising the following steps:
the train-mounted equipment acquires a safe speed-limiting starting position, a speed-limiting terminal point and a speed-limiting value of civil engineering in front of a line through a speed-limiting responder group on the line;
the speed of the train reaching the small curve radius does not exceed the safe speed limit by adding the middle step-by-step safe speed limit in front of the small curve of the line.
2. The ladder type safety control curve design method for the overspeed safety protection of the tram as claimed in claim 1, wherein the speed limit transponder group stores three sets of speed limit data, PSR1, PSR2 and PSR3, wherein PSR3 is the actual safety speed limit of civil engineering, and PSR1 and PSR2 are the intermediate safety speed limit added in front of PSR 3.
3. The step-type safety control curve design method for the overspeed safety protection of the tram as claimed in claim 1, wherein the vehicle-mounted device reads three speed limit information of PSR1, PSR2 and PSR3 simultaneously when the train passes over the transponder group.
4. The step-type safety control curve design method for the overspeed safety protection of the tramcar according to claim 3, characterized in that each piece of speed limit information consists of three parts, namely a speed limit starting coordinate, a speed limit length and a safety speed limit value;
the safety speed limit value of the PSR1 is greater than that of the PSR2, and the safety speed limit value of the PSR2 is greater than that of the PSR 3.
5. The step-type safety control curve design method for the overspeed safety protection of the tram as claimed in claim 4, wherein the on-board unit monitors the actual speed of the train according to three safety limits of PSR1, PSR2 and PSR3 in sequence.
6. A stepped safety control curve design method for the overspeed safety protection of a tram as claimed in claim 5, wherein when the train enters the PSR1 speed limit area, if the actual train speed is greater than the set value, the onboard equipment will send out the warning, service brake SB or emergency brake EB command to the train to ensure that the train decelerates without crossing the safety limit value of the area.
7. The step-type safety control curve design method for the overspeed safety protection of the tramcar according to claim 4, characterized in that the design of step-by-step speed limit can realize that the train does not overspeed before approaching or entering the final safety speed limit area, i.e. the train can normally brake at a reduced speed before entering the front safety speed limit area, and the train is ensured not to overspeed after entering the safety speed limit area.
8. The step-type safety control curve design method for the overspeed safety protection of the tram according to claim 4, characterized in that a PSR curve is formed by the three pieces of speed limit information of PSR1, PSR2 and PSR3 stored in the speed limit transponder group.
9. The method as claimed in claim 8, wherein the final control curve is substantially parallel to the PSR curve, a set difference exists between the final control curve and the PSR curve in the speed limit value at the same position, and the final control curve has a speed lower than the PSR curve at the same position.
10. The step-type safety control curve design method for the overspeed safety protection of the tram according to claim 8, wherein the speed limit values of the PSR1, the PSR2 and the PSR3 are designed and calculated in a simulation mode according to actual operation efficiency requirements.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011452542.4A CN112550365A (en) | 2020-12-12 | 2020-12-12 | Step type safety control curve design method for tramcar overspeed safety protection |
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| CN202011452542.4A CN112550365A (en) | 2020-12-12 | 2020-12-12 | Step type safety control curve design method for tramcar overspeed safety protection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113879368A (en) * | 2021-09-28 | 2022-01-04 | 卡斯柯信号有限公司 | Train brake control method and equipment supporting multistage deceleration and storage medium |
| CN114872769A (en) * | 2022-04-08 | 2022-08-09 | 交控科技股份有限公司 | Railway static speed limit detection method and device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009254016A (en) * | 2008-04-01 | 2009-10-29 | Mitsubishi Electric Corp | Automatic train control system and automatic train control method |
| CN102616259A (en) * | 2011-01-27 | 2012-08-01 | 铁道部运输局 | Method and system for column control temporary speed limit |
| CN104554299A (en) * | 2014-11-21 | 2015-04-29 | 北京交控科技有限公司 | Automatic train drive method based on ATP/TD loop line mode |
| CN105667544A (en) * | 2016-01-05 | 2016-06-15 | 卡斯柯信号有限公司 | Automatic protection system for tramcar |
| US20160229422A1 (en) * | 2015-02-09 | 2016-08-11 | General Electric Company | Communication system and method of a vehicle consist |
| CN106274987A (en) * | 2016-08-31 | 2017-01-04 | 上海自仪泰雷兹交通自动化系统有限公司 | A kind of point type ATP means of defence under degraded signal system |
| CN109367584A (en) * | 2018-12-04 | 2019-02-22 | 卡斯柯信号有限公司 | A kind of ATP system for tramcar |
-
2020
- 2020-12-12 CN CN202011452542.4A patent/CN112550365A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009254016A (en) * | 2008-04-01 | 2009-10-29 | Mitsubishi Electric Corp | Automatic train control system and automatic train control method |
| CN102616259A (en) * | 2011-01-27 | 2012-08-01 | 铁道部运输局 | Method and system for column control temporary speed limit |
| CN104554299A (en) * | 2014-11-21 | 2015-04-29 | 北京交控科技有限公司 | Automatic train drive method based on ATP/TD loop line mode |
| US20160229422A1 (en) * | 2015-02-09 | 2016-08-11 | General Electric Company | Communication system and method of a vehicle consist |
| CN105667544A (en) * | 2016-01-05 | 2016-06-15 | 卡斯柯信号有限公司 | Automatic protection system for tramcar |
| CN106274987A (en) * | 2016-08-31 | 2017-01-04 | 上海自仪泰雷兹交通自动化系统有限公司 | A kind of point type ATP means of defence under degraded signal system |
| CN109367584A (en) * | 2018-12-04 | 2019-02-22 | 卡斯柯信号有限公司 | A kind of ATP system for tramcar |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113879368A (en) * | 2021-09-28 | 2022-01-04 | 卡斯柯信号有限公司 | Train brake control method and equipment supporting multistage deceleration and storage medium |
| CN113879368B (en) * | 2021-09-28 | 2022-12-02 | 卡斯柯信号有限公司 | Train brake control method and equipment supporting multistage deceleration and storage medium |
| EP4180302A4 (en) * | 2021-09-28 | 2024-02-28 | Casco Signal Ltd. | Train braking control method supporting multi-stage deceleration, device and storage medium |
| CN114872769A (en) * | 2022-04-08 | 2022-08-09 | 交控科技股份有限公司 | Railway static speed limit detection method and device |
| CN114872769B (en) * | 2022-04-08 | 2024-04-16 | 交控科技股份有限公司 | Railway static speed limit detection method and device |
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Application publication date: 20210326 |