TWI761882B - Method, track system and computer program product for determining prediction sign - Google Patents

Abstract

A method for determining a prediction sign includes: setting a time point of the prediction sign; determining if a train starting from a current station at the time point can pass through an intersection directly; determining if waiting time is greater than an upper limit of waiting time and times of stop are greater than an upper limit of stop times if the train cannot pass through the intersection directly; setting that the prediction sign shows “stop” if the waiting time is greater than the upper limit of waiting time and the times of stop are greater than the upper limit of stop times; setting that the prediction signs shows “go” after determining that the train can pass all intersections if the train can pass the intersection directly or the train cannot pass the intersection directly but the waiting time is less than the upper limit of waiting time and the times of stop are less than the upper limit of stop times.

Description

Forecast signal judgment method, track system and computer program product

The present disclosure relates to a method for judging a warning sign of a track system, which is used to indicate when it is possible to leave the station without violating the regulations on the number of stops and waiting time.

In some light rail systems, the power of the train comes from the supercapacitor mounted on the train. When the train stops at the station, the supercapacitor is charged. After the train leaves the station, it relies on the power supply from the capacitor to drive to the next station. However, the light rail has no absolute right of way, and sometimes it has to stop at the intersection and wait for the train to pass. In order to avoid the train running out of power, the management unit stipulates the maximum number of seconds and the number of stops between stations. If there are multiple intersections between the stations and the time of leaving the station is not appropriate, the train will stop waiting for seconds or stop more than the specified number of times, or even stop running without electricity, which will seriously affect the operation of the light rail.

The embodiment of the present invention provides a method for judging a warning sign, which is applicable to a track system. The track system includes a current stop station and a next stop station, there is at least one intersection between the current stop station and the next stop station, and the current stop station has a warning sign. The method for judging the warning sign includes: setting the time point of the warning sign; judging whether the train can immediately pass through the intersection when it departs from the current stop at the above-mentioned time point; if the train cannot pass the intersection immediately, judging whether the waiting time exceeds the upper limit of the waiting time , and judge whether the number of stops exceeds the upper limit of the number of stops; if the waiting time exceeds the upper limit of the waiting time or the number of stops exceeds the upper limit of the number of stops, set the warning sign to show that the station cannot leave the station at the time point; if the train can pass the intersection immediately, or the train cannot pass immediately At the intersection but the waiting time does not exceed the upper limit of the waiting time and the number of stops does not exceed the upper limit of the number of stops, after judging that the train can pass through all the intersections, a warning sign is set to indicate that the train can leave the station at the time point.

In some embodiments, the step of judging whether the train can immediately pass through the intersection when the train departs from the current stop at the time point to the intersection includes: adding the time point to the time when the train travels to the intersection to obtain the first time point; judging the first time point; Whether the time point is less than the starting time point of the passing phase of the intersection; and if the first time point is less than the starting time point of the passing phase of the intersection, it is judged that the train cannot pass through the intersection immediately.

In some embodiments, the above step of judging whether the train can immediately pass through the intersection when the train departs from the current stop at the time point to the intersection further includes: judging whether the first time point is less than the termination time point of the passing phase of the intersection; When the time is greater than or equal to the termination time point of the passing phase of the intersection, it is judged that the train cannot pass through the intersection immediately.

In some embodiments, the above step of judging whether the train can immediately pass through the intersection when the train departs from the current stop station to the intersection at the time point further includes: judging whether the first time point plus the time required to pass through the intersection is less than the passing time of the intersection If not, it is judged that the train cannot pass through the intersection immediately; if so, it is judged that the train can pass through the intersection immediately.

In some embodiments, the above step of judging whether the waiting time exceeds the upper limit of the waiting time includes: if the first time point is less than the starting time point of the traffic phase of the intersection, judging the waiting time plus the time required to wait until the starting time point Whether the time is greater than the upper limit of the waiting time; if the first time is greater than or equal to the end time of the traffic phase at the intersection, judge whether the waiting time plus the start time of the next traffic phase waiting to the intersection is greater than the upper limit of the waiting time.

In some embodiments, the step of judging that the train can pass through all the intersections includes: adding the time point to the time required to pass through the current intersection to obtain a second time point; and judging whether the train departs from the current intersection at the second time point Pass the remaining intersections.

From another perspective, an embodiment of the present invention provides a track system including a train, a current stop, a next stop, and a controller. There is at least one intersection between the current stop and the next stop. The controller is communicatively connected to the warning sign of the current stop to perform the following steps: setting the time point of the warning sign; judging whether the train can immediately pass through the intersection when it departs from the current stop at the time point; If you cannot pass the intersection immediately, judge whether the waiting time exceeds the upper limit of the waiting time, and judge whether the number of stops exceeds the upper limit of the number of stops; if the waiting time exceeds the upper limit of the waiting time or the number of stops exceeds the upper limit of the number of stops, the warning sign will be set to indicate that you cannot leave the station at the time point. ; If the train can pass through the intersection immediately, or the train cannot pass through the intersection immediately but the waiting time does not exceed the upper limit of the waiting time and the number of stops does not exceed the upper limit of the number of stops, set a warning sign after judging that the train can pass through all the intersections at the time point to show that it is possible to leave. stand.

From another perspective, an embodiment of the present invention provides a computer program product for the above-mentioned track system. The computer program product is used to be loaded and executed to complete the above-mentioned method for judging the warning sign.

In the above-mentioned system and method, it can be accurately determined whether the train can leave the station at a certain point in time, and at the same time, the limit of the number of stops and the waiting time can be met.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

The terms "first", "second", etc. used in this document do not mean a particular order or order, but are only used to distinguish elements or operations described in the same technical terms. In addition, with regard to "communication connection" as used herein, it means that two components can exchange information with each other through wired or wireless means.

FIG. 1 is a schematic diagram illustrating a track system according to an embodiment. Referring to FIG. 1 , the rail system includes a train 110 and a plurality of platforms. Taking the current stop 120 and the next stop 130 as an example, there is one or more intersections between the current stop 120 and the next stop 130 . At present, there is also a warning sign 140 on the docking station 120. The warning sign 140 can display at least two light signs 141 and 142, wherein the light sign 141 indicates "cannot leave the station", and the light sign 142 indicates "can leave the station".

The controller 150 is used to communicate with the warning sign 140 and execute a warning sign judging method to control the warning sign 140 to switch to the light signal 141 or the light signal 142 . The controller 150 can be a personal computer, a server, a central control computer, or various computer systems or electronic devices with computing capabilities.

Each intersection has a traffic sign to indicate whether the train 110 can pass through the intersection. For example, if the traffic sign at intersection 1 is in phase 161 or phase 163, it means that the train 110 cannot pass. If the traffic sign of the intersection 1 is in the phase 162, it means that the train 110 can pass through, and the phase 162 is referred to as the "passing phase" herein. If the traffic sign is not in the passing phase 162 when the train 110 arrives at the intersection 1, it means that the train 110 must stop and wait. In this embodiment, it is set that the waiting time of the train 110 traveling from the current stop 120 to the next stop 130 cannot exceed an upper limit of the waiting time, and the number of stops cannot exceed an upper limit of the number of stops. The controller 150 is used to control the advance sign 140 to indicate when the train 110 can leave the current stop 120, while complying with the above-mentioned restrictions on the waiting time and the number of stops.

2A and 2B are flow charts illustrating a method for judging a warning sign according to an embodiment. The method uses a simulation method to judge whether the departure of a train at a time point can meet the limitation of the waiting time and the number of stops. Please refer to FIG. 2A and FIG. 2B , in step 201 , initial setting is performed. A total of 7 variables are set here, the real number PredictTime represents the time point of the warning sign, the positive integer CrossingCnt represents the number of intersections, the integer WaitTimes represents the number of stops of the train, the real number WaitSec represents the waiting time of the train, and the real number T represents the traveling time of the simulated train. point, the real number Ti represents the time it takes for the train to pass through the current intersection, and the integer N represents the number of intersections the train has passed through. In step 201, PredictTime is set as the time to obtain the warning signal, CrossingCnt is set as the number of intersections from the current stop 120 to the next stop 130, T=PredictTime, WaitTimes=0, WaitSec= 0, N=0. Here, the (N+1)th intersection is the current intersection.

In step 202, it is judged whether the train has passed all the intersections, expressed by the above-mentioned variables, that is, it is judged that N>=CrossingCnt. If the result of step 202 is "Yes", go to step 203 to confirm that the number of parking times WaitTimes does not exceed the upper limit of the number of parking times, and the waiting time WaitSec does not exceed the upper limit of the waiting time, then in step 204, set the warning sign at this time point PredictTime shows that it is possible to leave stand.

If the result of step 202 is no, it means that the train has not passed all the intersections, and then the procedure S1 is performed to determine whether the train can immediately pass through the current intersection when it departs from the current stop 120 to the current intersection at the time point PredictTime. Here, "pass through immediately" means that when the train arrives at the intersection, the traffic sign at the intersection is in the passing phase, so the train does not need to stop and wait.

Please refer to FIG. 2B and FIG. 3 at the same time. Specifically, in step 205, the time point T is added to the time required to travel to the (N+1)th intersection, and the time required to travel to the (N+1)th intersection is expressed as T( N+1), so step 205 can be expressed as T+=T(N+1), and the updated time point T is called the first time point.

In step 206, it is judged whether the first time point T is less than the starting time point of the traffic phase at the (N+1)th intersection, and this judgment can be expressed as T>C ₁ PLS, where C ₁ PLS is the traffic phase 162 starting time point. If the result of step 206 is yes, it means that the train cannot pass through the (N+1)th intersection immediately. For example, in FIG. 3 , if the train departs at time point 301 , it is not in the traffic phase 162 when it arrives at the intersection, and must wait until the starting time point C ₁ PLS of the traffic phase 162 . Therefore, in step 207, the waiting time is added to the time required to wait until the start time point of the pass phase 162, and this calculation can be expressed as WaitSec+=C ₁ PLS-T. In addition, in step 207, the number of stops is added by 1, which is represented as WaitTimes+=1; and the time point T is also set as the starting time point of the passing phase 162, which is represented as T=C ₁ PLS.

If the result of step 206 is otherwise, go to step 208 to judge whether the first time point T is less than the termination time point of the (N+1)th intersection passing phase, and this judgment can be expressed as T>C ₁ PLE, where C ₁ PLE Indicates the end time point of the transit phase 162 . If the result of step 208 is no, it means that the train cannot pass the (N+1)th intersection immediately. For example, if the train departs at time point 303, it will miss the first pass phase 162 and must wait until the next pass. The starting time point C ₂ PLS of phase 164 . Therefore, in step 209, the waiting time is added to the starting time point of waiting until the next passing phase 164 of the intersection, and this calculation can be expressed as WaitSec+=C ₂ PLS-T. In addition, in step 209, the number of stops is added by 1, which is represented as WaitTimes+=1; and the time point T is also set as the starting time point of the traffic phase 164, which is represented as T=C ₂ PLS.

If the result of step 208 is yes, go to step 210 to determine whether the first time point T plus the time required to pass through the (N+1)th intersection is less than the end time point of the passing phase of this intersection, this step can be expressed as is T+Ti>C ₁ PLE. If the result of step 210 is otherwise, it is determined that the train cannot pass through the intersection immediately, and then step 209 is performed. If the result of step 210 is yes, it is judged that the train can pass through the intersection immediately. For example, in FIG. 3, if the train departs at time point 302, the train can directly pass through the (N+1)th intersection.

In step 211, it is determined whether the number of parking times WaitTimes exceeds the upper limit of the number of parking times. If the result of step 211 is otherwise, go to step 212 to determine whether the waiting time WaitSec exceeds the upper limit of the waiting time. If the result of step 211 or step 212 is yes, set the forecast sign to show that the station cannot be left at the time point PredictTime (step 213).

If the result of step 212 is no, it means that the train cannot pass through the intersection immediately but meets the limit of waiting time and number of stops, then proceed to step 214 to set the train to pass through the current intersection, that is, add the time point T to the time required to pass through the current intersection , expressed as T+=Ti. On the other hand, if the result of step 210 is YES, in step 215 the train is similarly set to pass through the (N+1)th intersection, which is expressed as T+=Ti. The updated time point T is also referred to as the second time point.

After setting the train to pass through the (N+1)th intersection, in step 216, continue to judge whether the train can pass the remaining intersections at the second time point T from the current intersection, that is, execute N+=1 and return to step 202.

2A and 2B are executed, it can be determined that the forecast sign at the time point PredictTime should display the station that can leave the station or the station that cannot be left, and then the time point PredictTime can be changed and the steps of FIG. 2 can be re-executed. In this way, as shown in FIG. 1 , the warning sign 140 can display corresponding lights at different time points to inform the train driver whether it is possible to leave the station at this time. It is worth noting that the light signal of the warning sign 140 can be represented by any color and shape pattern, and can also be represented by any text, number or symbol, and in some embodiments, it can also display how much time it still needs to wait before leaving. station, this disclosure is not limited to this.

On the other hand, it should be noted that each step in FIG. 2A and FIG. 2B can be implemented as a plurality of codes or circuits, and the present invention is not limited thereto. In addition, the methods of FIG. 2A and FIG. 2B may be used in conjunction with the above embodiments, or may be used alone. In other words, other steps may also be added between the steps in FIGS. 2A and 2B .

From another perspective, the present invention also proposes a computer program product, which can be written in any programming language and/or platform. When the computer program product is loaded into a computer system and executed, it can execute FIG. 2A . with the method of Figure 2B.

In the above-mentioned pre-announcement signal judgment method and track system, it is possible to accurately determine whether the train can leave the station at a certain point in time, and at the same time meet the restrictions on the number of stops and waiting time, which can provide a clear departure instruction for driving, and avoid the train Power outages affect operations.

Although the present invention has been disclosed above by the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the scope of the appended patent application.

110: Train 120: Current stop 130: Next stop 140: Prediction sign 141, 142: Light sign 150: Controller 161, 162, 163, 164: Phase S1: Program 201~216: Step 301~303, PredictTime: Time point T(N +1): The time required to travel to the (N+1)th intersection C ₁ PLS, C ₂ PLS: the starting time point C ₁ PLE: the ending time point Ti: the time required for the train to pass the i-th intersection

[FIG. 1] is a schematic diagram illustrating a track system according to an embodiment. [ FIG. 2A ] and [ FIG. 2B ] are flowcharts illustrating a method for determining a warning sign according to an embodiment. [ FIG. 3 ] is a schematic diagram illustrating determining whether a train can pass through an intersection according to an embodiment.

110: Train 120: Current stop 130: Next stop 140: Warning Sign 141, 142: Lights 150: Controller 161, 162, 163: Phases

Claims (4)

A method for judging a warning sign is applicable to a track system, the track system includes a current stop and a next stop, there is at least one intersection between the current stop and the next stop, and the current stop has a A warning sign, the method for judging the warning sign includes: setting a time point of the warning sign; judging whether a train can immediately pass through the at least one intersection when it departs from the current stop at the time point to the at least one intersection, The step of judging whether the train can immediately pass through the at least one intersection when it departs from the current stop station at the time point to the at least one intersection includes: adding the time point to the time when the train travels to the at least one intersection to obtain The first time point; if the first time point is less than the starting time point of the passing phase of the at least one intersection, it is judged that the train cannot pass through the at least one intersection immediately, a number of stops is added by 1, and a waiting time time plus the time required to wait until the starting time point; and if the first time is greater than or equal to the end time point of the passing phase of the at least one intersection or the first time point plus the time required to pass through the at least one intersection After the required time is greater than or equal to the termination time point of the traffic phase of the at least one intersection, determine that the train cannot pass through the at least one intersection immediately, add 1 to the number of stops, and add the waiting time to the waiting time until the The starting time of the next traffic phase of at least one intersection, otherwise it is judged that the train can pass through the at least one intersection immediately; if the train cannot pass the at least one intersection immediately, it is judged that the waiting time If the waiting time exceeds the upper limit of the waiting time or the number of parking times exceeds the upper limit of the number of parking times, set the warning sign to show that the number of stops cannot be displayed at this time. and if the train can pass through the at least one intersection immediately, or the train cannot pass through the at least one intersection immediately but the waiting time does not exceed the upper limit of the waiting time and the number of stops does not exceed the upper limit of the number of stops, the train is judged to be After passing through all the at least one intersection, the warning sign can be set to show that the station can be left at the time point. The method for judging an advance sign according to claim 1, wherein the step of judging that the train can pass through all the at least one intersection includes: adding the time point to the time required to pass through a current intersection to obtain the second time point; and judging whether the train can pass through the remaining at least one intersection when starting from the current intersection at the second time point. A track system, comprising: a train; a current stop; a next stop, wherein there is at least one intersection between the current stop and the next stop; and a controller that is communicatively connected to the current stop a warning sign, with To perform a plurality of steps: set a time point of the warning sign; determine whether the train can immediately pass through the at least one intersection when it departs from the current stop at the time point to the at least one intersection, wherein it is determined that the train is at the at least one intersection. The step of whether the time point can immediately pass through the at least one intersection when starting from the current stop station to the at least one intersection includes: adding the time point to the time when the train travels to the at least one intersection to obtain the first time point; if The first time point is less than the start time point of the passing phase of the at least one intersection, it is judged that the train cannot pass through the at least one intersection immediately, a number of stops is added by 1, and a waiting time is added to wait until the The time required for the starting time point; and if the first time is greater than or equal to the end time point of the passing phase of the at least one intersection or the first time point plus the time required to pass the at least one intersection is greater than or equal to At the termination time point of the passing phase of the at least one intersection, it is determined that the train cannot pass through the at least one intersection immediately, the number of stops is added by 1, and the waiting time is added to the next waiting time at the at least one intersection. The starting time of the traffic phase, otherwise it is judged that the train can pass through the at least one intersection immediately; if the train cannot pass the at least one intersection immediately, judge whether the waiting time exceeds a waiting time upper limit, and judge whether the number of stops exceeds An upper limit of the number of stops; if the waiting time exceeds the upper limit of the waiting time or the number of stops exceeds the upper limit of the number of stops, set the warning sign to display no Can leave the station; if the train can pass through the at least one intersection immediately, or the train cannot pass through the at least one intersection immediately but the waiting time does not exceed the upper limit of the waiting time and the number of stops does not exceed the upper limit of the number of stops, the train is judged to be After passing through all the at least one intersection, the warning sign can be set to show that the station can be left at the time point. A computer program product for a track system, wherein the track system includes a train, a current stop and a next stop, there is at least one intersection between the current stop and the next stop, the current stop Having a warning sign, the computer program product is used to be loaded and executed to complete a plurality of steps: setting a time point of the warning sign; judging that the train departs from the current stop at the time point to the at least one Whether the at least one intersection can be passed immediately at the intersection, wherein the step of judging whether the train can immediately pass through the at least one intersection when the train departs from the current stop at this time point to the at least one intersection includes: adding the time point to the at least one intersection. The time when the train travels to the at least one intersection to obtain the first time point; if the first time point is less than the starting time point of the passing phase of the at least one intersection, it is determined that the train cannot pass through the at least one intersection immediately, and the Add 1 to the number of stops, and add a waiting time to the time required to wait until the starting time point; and if the first time is greater than or equal to the passing phase of the at least one intersection or the first time point plus the time required to pass through the at least one intersection is greater than or equal to the termination time point of the passing phase of the at least one intersection, it is judged that the train cannot pass through the at least one intersection immediately, Add 1 to the number of stops, and add the waiting time to the starting time of the next traffic phase at the at least one intersection, otherwise it is judged that the train can pass through the at least one intersection immediately; if the train cannot immediately Through the at least one intersection, determine whether the waiting time exceeds an upper limit of the waiting time, and determine whether the number of stops exceeds an upper limit of the number of stops; if the waiting time exceeds the upper limit of the waiting time or the number of stops exceeds the upper limit of the number of stops, set the The warning sign shows that the station cannot be left at the time point; and if the train can pass the at least one intersection immediately, or the train cannot pass the at least one intersection immediately but the waiting time does not exceed the waiting time upper limit and the number of stops does not exceed For the upper limit of the number of stops, after judging that the train can pass through all the at least one intersection, the warning sign is set to indicate that the train can leave the station at the time point.

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