JPH0248265A - Railway crossing simulator - Google Patents

Abstract

PURPOSE:To conduct simply and rapidly and analysis and verification of a railway crossing action, by converting a railway crossing connecting diagram prepared and edited on an indicating screen after its having been inputted, into a logic formula, and operating the above logic formula on the basis of an inputted action condition. CONSTITUTION:A railway crossing connecting diagram input editing portion 2 inputs a railway crossing connecting diagram and prepares and edits the railway crossing connecting diagram on the indicating screen of an indicating device 8. The railway crossing connecting diagram which has been prepared and edited is memorized at a file portion 1. A logic analysis portion 4 prepares a logic formula by analyzing logically this railway crossing connecting diagram, and an operation processing portion 5 operates the logic formula according to a condition inputted from an input device 6. And, a simulation result is outputted and indicated at the indicating device 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for simulating railroad crossing operations.

〔overview〕

The present invention is a level crossing simulation device that simulates railroad crossing operations, which creates and edits a level crossing connection diagram, converts the created and edited level crossing connection diagram into a logical formula, and inputs appropriate operating conditions. This makes it possible to easily and quickly perform connection operation simulations.

[Conventional technology]

Conventionally, in analyzing railroad crossing operations, people have assumed the operating states of each element that makes up a railroad crossing connection diagram and considered how the circuit will operate in each case.

Furthermore, even if there is a simulation device for level crossing connections, it only simulates individual level crossings.For example, when analyzing the cause of an accident by simulating the behavior of a level crossing where an accident has occurred, The method involves creating connections and simulating their operation to analyze the cause of accidents, and there was no general-purpose simulation of the operation of railroad crossing connections.

[Problem that the invention seeks to solve]

With such conventional analysis methods, there are problems in that it takes time to verify level crossing operations, prevents sufficient advance consideration, and prevents prompt investigation of the cause of an accident.

Furthermore, conventional level crossing operation analysis technology does not take into account the characteristics of the relays that make up the level crossing connection, and does not take into account time delays or undefined time elements in relay operation, so there may be a difference between actual operation and There was a big problem.

The present invention solves the above-mentioned problems, and provides a simulation device for a railroad crossing motion that can easily and quickly analyze and verify a railroad crossing motion, and can perform the analysis under operating conditions extremely close to the actual motion. With the goal.

[Means for solving problems]

The present invention provides an input editing means for inputting a level crossing connection diagram and creating and editing it on a display screen, a means for converting the level crossing connection diagram created and edited by this means into a logical formula, and inputting operating conditions for simulation. The present invention is characterized by comprising means for calculating the logical formula based on input operating conditions, and means for displaying and outputting the results of the calculation.

The level crossing connection diagram input/editing means of the present invention includes a character input means and a graphics input means, and graphical symbols indicating the operating functions of the level crossing wiring diagram are displayed, and by specifying this graphical symbol, the level crossing It is preferable to include means for creating and editing a wiring diagram.

Moreover, it is preferable that the means for inputting the operating conditions for the simulation of the present invention includes means for inputting the delay characteristics and indefinite characteristics of the relays forming the level crossing connection diagram.

[Effect]

To simulate a level crossing operation, first, a level crossing connection diagram is created and edited on a CRT.

To create and edit this level crossing connection diagram, a graphic symbol indicating the function of the level crossing connection will be displayed on the display screen, specify this graphic symbol,
It is created by pointing to a predetermined location of a line drawn on the display screen and inputting characters.

This created and edited level crossing connection diagram is stored as a file and converted into a logical formula. This conversion into a logical formula is automatically performed using the graphical symbols that indicate the functions of the level crossing connections and their mutual relationships.

Next, the operation conditions of the railroad crossing are input to this logical expression, the logical expression is calculated, and the operation is simulated. As this operating condition, the operating condition of the level crossing contact point is input. Note that operating conditions such as relay time delay and indefinite time determined by the type of relay used in the wiring diagram are input in advance.

Calculate the railroad crossing logical formula according to the input conditions,
The results of the operation time are displayed on the time axis for each logical formula.

〔Example〕

The present invention will be described in detail below with reference to the drawings.

FIG. 2 is a block diagram showing the hardware configuration of a railroad crossing simulation device according to an embodiment of the present invention. The railroad crossing simulation device of this embodiment uses a computer device using an ordinary microprocessor. That is, the CPU 12, ROM 13, and RAM 1 are connected to the common bus 11.
4 is connected to the common bus 11, and a keyboard 1 is connected to the common bus 11 as an input device via a keyboard interface 15.
6 and a mouse 18 as a graphic input device are connected via a mouse interface 17, and a printer 20 is connected as an output device via a printer interface 19 to a CRT interface 21 and a graphic RA.
A CRT 22 is connected via M23. Also,
A floppy disk device or a fixed disk device 25 is connected to the device of this embodiment via a disk interface 24.
is connected.

Next, FIG. 1 shows the configuration of a level crossing simulation device of the present invention constructed from the above-described embodiment device.

FIG. 1 shows the configuration of this embodiment. This embodiment includes a level crossing diagram input/editing unit 2 that inputs a level crossing diagram and creates and edits the level crossing diagram, and It is comprised of a file section 1 for storing data, and a simulation section 3 that performs a logical analysis of the level crossing connection diagram stored in the file section 1 and performs calculations according to input operating conditions to simulate the operation of a level crossing. The simulation section 3 includes a logic analysis section 4 that logically analyzes the created level crossing connection diagram to create a logical formula, and an arithmetic processing section 5 that computes the logical formula according to input conditions.

And, the level crossing connection diagram input editing section 2 and the calculation processing section 5 are as follows.
It is connected to an input device 6 for inputting the level crossing connection diagram and simulation operating conditions, a printing device 7 for outputting the level crossing connection diagram and simulation results, and a display device 8 for displaying the level crossing connection diagram and simulation results. Input according to the work content and output and display the results.

Next, the operation of this embodiment will be explained using a specific example of a simulation operation of a railroad crossing.

First, the operation of inputting and editing the level crossing connection diagram will be explained.

FIG. 3 shows a specific example of a railroad crossing connection diagram input into the device of this embodiment and created and edited. This level crossing connection diagram is
This is a wiring diagram of a railroad crossing alarm circuit under the conditions shown in the control diagram shown in the figure.

In other words, it is a double track, automatic warning, there is a continuing train between the stops, and there is a blockage signal (lower 2) within the warning section between the stops.
, which shows the alarm control circuit when a level crossing controller is used for control, where A, B, C, and D are level crossing controllers,
The period from A to D is the warning section. If the control diagram shown in FIG. 4 is used as a level crossing connection diagram, it will be as shown in FIG. 3.

In this wiring diagram, APR, BPR, CPRSDPR.

Lower SR and R indicate relays.

The level crossing connection diagram shown in FIG. 3 will be explained. This level crossing connection diagram is created by focusing on the sequence of operations of each control element constituting the level crossing alarm control circuit, and one connection represents the operation of each control element. For example (1
) indicates the operation of the controller A, and the left side B24 is +
The power supply potential is 24V, and C24 on the right side indicates the ground potential corresponding to the power supply terminal.Since the controller A is a sensor that detects the passage of a train, when the train passes A, the contact point A, which is represented by a downward arrow, A becomes off (i.e. open), and A
The PR contact is turned off. Similarly, the controllers B and C shown in (2) and (3) also operate in the same way as the controller A in (1). Further, when a train passes by, the control switch contacts D are turned on (ie, short-circuited), current flows through the DPR coil, and the DPR contacts are turned on.

The connection diagram shown in (5) is one that shows the relay operation for detecting an outbound train, and this relay lower SR has a self-holding contact in its own connection diagram.

Normally, the lower SR is turned on, and the contact of the lower SR is also turned on. Further, APRSBPR and CPR are on, and DPR is off.

When the train passes points A, B, and C, the above (1) to (3)
), APR, BPR, and CPR are turned off, so the lower SR is turned off. After the train passes the railroad crossing, A
Even if PR, BPR or CPR is turned on,
Since the contact of the lower SR is off, the lower SR maintains the off state. When the train passes the point after passing the level crossing, the DPR
is turned on, and the lower SR is turned on. When the lower SR turns on, the lower SR contact also turns on, and even if the DPR turns off after the train passes point D, the lower SR remains on because the lower SR contact is on. do.

(6) shows the operation of relay R operated by the controllers of A-D. This relay R operates a railroad crossing alarm, etc., and the overall result of the operation of the controllers of A-D is Demonstrate operation. Note that the upward arrow in (6) is
When the control element turns on, the DPR turns on, and the contacts that turn off at that time are shown. Relay R turns off when the lower SR is on and the DPR contact is on, and either one of them turns off. The level crossing warning system is relay R.
But when it's off, it works.

The operation of inputting, creating and editing the level crossing connection diagram shown in FIG. 3 will be explained.

First, when the simulation device is started, the program is started and a screen prompting the user to select whether to create a new railroad crossing connection diagram is displayed on the screen displayed on the CRT of the device. Then, from the selection screen displayed on the CRT, the user selects the option to create a new level crossing connection diagram. Then, use the keyboard to input the title and title table of the railroad crossing connection diagram to be created. As the title, enter a name such as "Alarm Control Circuit Example 1". Also,
As a supplementary table, ``Double track, automatic, between stops, with following trains.

”. Furthermore, the control diagram shown in FIG. 4 is input. This supplementary table and control diagram do not directly affect the results of the level crossing simulation.

When you select the level crossing connection diagram creation selection screen, Figure 5 (a)
As shown in , on the CRT display screen, various graphical symbols indicating controllers, relays, etc. used in each railroad crossing connection diagram are displayed on the right side of the screen. So, while looking at the display screen,
Draw a line at the position of the arrow by operating the mouse 18 (Fig. 5 Q))). Next, move the mouse 18 to the position where the graphic symbol is displayed, select the graphic symbol to draw, and move it to the line on the display screen to draw the graphic symbol (Figure 5 (C))
. Thereafter, the user enters character input mode and operates the keyboard 16 to input necessary characters. For example, in the fifth diagram in Figure 3, the names of relays such as APRSBPR are input from the left (Figure 5 (d)).

In this way, the level crossing connection diagram shown in FIG. 3 is created.

Note that (FP-260) shown in FIG. 3 indicates the model number of the relay, so it is input into the level crossing connection diagram.

The level crossing connection diagram created and edited in this way is sent to the file section 1, and stored in a form that can be searched by the input title and title name.

Next, the execution operation of the simulation using this level crossing connection diagram will be explained.

First, in order to run a simulation, the level crossing connection diagram created and edited and stored in the file unit 1 is stored in the logical analysis unit 4.
Convert it to a logical expression. The analysis into this logical formula is performed as follows.

First, if there is one relay in one connection, that connection is considered to be one logical formula, so
The connections in the diagram can be expressed as: ■ X=A ■ X=A AND B ■ X=A ORB ■ X=NOTA.

In addition, in the case of multiple wire connections, ■ and ■ in FIG. 6 can be expressed as B=A C=B. Therefore, by giving A, Bc
! : The state of C is determined. With a relay, if there is another connection that has the relay's contacts, it is related to one direction, so
A plurality of connections constitute an interrelated net.

For example, the level crossing connection diagram shown in Figure 3 is as follows: APR=A AND A BPR=B AND B CPR=CAND C DPR=D AND D Lower 5R=APRAND BPRAND CPRAN
[) (DPROR lower 5R) R=(NOT DPR) AND lower SR can be expressed as the logical formula. The creation of this net is done automatically. For example, rAPRJ of (1) and rAPR of (5) in Figure 3 are automatically configured as the same net, so the level crossing connection shown in Figure 3 In the figure, A, BSC, and D are simulation conditions, and when simulating the state of relay R, it is sufficient to give conditions A, B, C, and D.
Further, since the lower relay SR is influenced by itself, it is sufficient to give an initial value.

Through such logical analysis, the logical analysis unit 4 automatically converts the level crossing connection diagram into a logical formula.

Next, inputting operating conditions for simulation will be explained.

First, when considering the operation of each contact that appears in the level crossing wiring diagram, there are two types: simple contacts and relay contacts included in the wiring. Among these, for simple contacts, the simulation operator needs to input the conditions, and for relay contacts, the operation is automatically determined once the state of the relay is determined.

In addition, there are two types of simple contacts: those whose values are fixed and those whose values change over time.As the conditions for the contacts, the simple contacts are set as either fixed or variable before the simulation. Note that the relay contacts are subordinate contacts.

First, in the level crossing connection diagram shown in Fig. 3, which serves as the operation input for the simulation, A, B, and -C are closed circuit type level crossing controllers, D is a closed circuit type level crossing controller, and A, B, and C are closed circuit type level crossing controllers. The falling time is 3.24 seconds and D is 1.08 seconds. This operating time is when the train speed is 50 km/h. As shown in Figure 4, if the distance from level crossing controller A to B is 200 m up to 100 mSC and 300 m up to D, then the train will pass from point A to B. 7.20 seconds after passing C, 14.40 seconds after passing C, and 21.60 seconds after passing D. The operation of each level crossing controller is shown in a time chart as shown in Fig. 7. Set and input these as variable conditions for simulation.

The operating condition input for this simulation is the level crossing controller A
, B, C, and D, a screen will appear prompting you to enter the time between each control element determined by the above-mentioned falling time and the train speed as a parameter in table format for each level crossing control element. and input them sequentially.

For example, as a variable condition setting, in the case of the speed condition mentioned above for controller A, for controller C, for controller R, for controller B, the variable conditions are as follows (hereinafter referred to as the margin of this page). Enter the conditions.

These variable conditions can be changed depending on the train speed conditions and the operating characteristics of the contacts.

Next, inputting conditions for relay characteristics will be explained.

The relay contacts have a delay time of t after the power is turned on, and then after an undefined time of t2, the contacts turn on in a stable state. When the power is turned off, it is turned off after an indefinite time t and a delay time t4. An example of this operation is shown in the time chart of FIG.

In the level crossing connection diagram shown in Figure 3, FP-260 is used as a relay.
is used, and its characteristics are shown in the table below.

F P-260 Relay Characteristic Table In this embodiment, the value (B) is input as the operating condition. This is because although the actual relay characteristic of FP-260 is (A), the minimum interval of calculation time in the simulation of the embodiment is set to 5 ms, so that it is synchronized with the calculation time. The characteristics of these relays are determined by the model number of the relay used, and the types of relays used for level crossing connections are limited, so enter the relay characteristic values in advance and check the relays used. By allowing simulation calculations to be performed using characteristic values determined by inputting and specifying the relay model number,
There is no need to input relay characteristic values each time.

Next, since the lower SR and R are relays, they are subordinate in setting conditions. These conditions are displayed on the condition setting screen.

It is necessary to give some initial values to the dependent conditions, and the lower SR is turned on and the R is turned on. Also, relays and contacts have three states: on, off, and undefined, so select one of them. Note that since the relay has delay characteristics and indefinite characteristics as described above, its state changes over time.

Note that the condition input can be similarly input on the screen on which the time chart of the simulation results is displayed.

Next, the simulation calculation operation in the calculation processing section 5 will be explained.

Logical analysis of the above-mentioned level crossing connection diagram and condition setting are followed by wheel calculations.

The logical calculation formula for the above example is shown below. However, relay FR
-260 is denoted by Y = f FP280(t, x).

At this time, X is an input, y is an output (contact), t is a time, and the output y is a function determined by the input and time.

A = tA(t) −(t)B =
f a (t) ---(2)c
= r c (t) − (a) D=f
o(t) ・ (4) APR=f,,,
6゜(t, A) (5) BPR=fppz
s. (t, B) (6) CP R= f
pp2go (t, C) (7)D
P R= f FP26[1(t, D)
---(8) Lower S R” f FP26° (APRAN
D BPRANDCPRAND (DPROR lower 5R)
) R= f PP2110 (NO lower S R to (NOT D P R)) αO However, at t=0, APR-ON ON=1) αDBPR=ON ON=1 > −,,,-,,(121C
PR-ON ON-1) 031 DPR=OFF OFF=0> α SR-ON (ON=1) a5) R=NEON ON=1> --[Dt=o, 1. 2.
α force Calculation is performed using this logical formula. (1
) to (4) indicate variable conditions, and (5) to α
The formula is a formula obtained by logical analysis from the connection diagram, and the formulas aυ to a'D indicate dependence among the conditions.

Calculations are performed sequentially starting from 1=0. This calculation interval is every 5is. Therefore, the resolution is 5 ms.

The simulation results are shown in FIG. 9 as a time chart. In FIG. 9, the hatched portion of the relay operation indicates an undefined state.

According to this simulation result, the time from launch to fall of Relay R, that is, the alarm sounding time, is 22.545.
seconds. To measure this time, specify the measurement mode displayed on the screen where the time chart is displayed and move the cursor from the starting point to the ending point.
This is done by displaying the time interval on the screen.

Since this simulation takes into account the indefinite time of the relay, it is possible to obtain results close to reality. If this undefined time is not taken into consideration, the undefined state shown in (■) in FIG. 9 does not appear, and when conventional simulations are performed manually, the undefined state of the relay R shown in (3) cannot be found.

Next, as a second example, a simulation in the case where there is a following train will be described.

The level crossing connection diagram is the same as in Figure 3, and as the operating conditions for the simulation, from level crossing controller A to B, 1
00 m, 200 m to C, 300 m to D, train speed is 53 km/h for the preceding train (Y train), 50 km/h for the continuing train (Z train), 9.5 seconds between trains (approximately 1
32 m) and the results of the simulation are shown in the first
This is shown in the time chart in Figure 0.

As a result, if we pay attention to relay R, we can see that the preceding train (Y train)
When passes D, R launches ■.

However, since the continuation countermeasure is taken by the level crossing controller C, when the train passes C, the relay R falls, and the no-alarm state does not occur.In this way, the simulation takes into account the irregular time of the relay. Therefore, simulation results close to reality can be obtained.

In addition, in the above-described embodiment, the route connection diagram created and edited on the screen and the time chart of the simulation results can not only be displayed on the CRT but also output to the printer. In addition, although only the time chart is shown as the simulation result, the display screen will display not only the time chart of the simulation result but also a display specifying the condition setting screen mode for changing time measurement or simulation condition settings. It is possible to measure the alarm time or change the simulation condition settings while viewing the simulation results.

〔Effect of the invention〕

As explained above, when performing a level crossing simulation, the present invention allows the operation of first inputting and creating a level crossing connection diagram for the level crossing simulation to be directly input while specifying the graphic symbol displayed on the CRT display screen with the mouse. Since you can edit the level crossing diagram easily, you can easily create and edit the level crossing connection diagram.

Furthermore, since the created level crossing connection diagram is automatically logically analyzed to create a logical formula, it is possible to reduce errors in creating logical formulas due to differences in human interpretation or misunderstandings.

In addition, by inputting the characteristics of relays such as undefined states as operating conditions and simulating them, it is possible to recognize the operation of the level crossing alarm circuit in a form that is close to the actual state. By taking this into account, it is possible to find undefined states that could not be discovered through conventional desk studies, and similar undefined states can be found in countermeasures against continuing trains.

Furthermore, by setting the contact conditions of the relay arbitrarily, it is possible to simulate various failure modes. This also has the effect of allowing quick response.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a block diagram of an apparatus according to an embodiment of the present invention. FIG. 3 is a railroad crossing connection diagram of the embodiment. Figure 4 is a control diagram of the warning control circuit for the level crossing shown in Figure 3. FIG. 5 is an example of a screen for explaining input creation of a level crossing connection diagram. FIG. 6 is a diagram showing an example of a railroad crossing connection. FIG. 7 is a time chart showing variable conditions of the embodiment. FIG. 8 is a time chart showing an example of relay operation. FIG. 9 is a time chart showing simulation results for the level crossing connection diagram shown in FIG. 3. FIG. 10 is a time chart showing simulation results when there is a following train. 1...File section, 2...Level crossing connection diagram input/editing section,
3...Simulation section, 4...Logic analysis section, 5
...Arithmetic processing unit, 6...Input device, 7...Printing device,...Display device, 11...Common bus, 12...
CPU, 13...ROM114...RAM, 15.
... Keyboard interface, 16... Keyboard, 17... Mouse interface, 18... Mouse, 19... Printer interface, 20... Printer, 21... CRT interface, 22... C
RT. 23...Graphic RAM, 24...Disk interface, 25...Disk device.

Claims (1)

[Scope of Claims] 1. An input editing means for inputting a level crossing connection diagram and creating and editing it on a display screen; a means for converting the level crossing connection diagram created and edited by this means into a logical formula; and a system for simulation. A railroad crossing simulation device comprising: means for inputting operating conditions; means for computing the above-mentioned logical formula based on the input operating conditions; and means for displaying and outputting the results of the computation. 2. In the level crossing simulation device according to claim 1, the level crossing connection diagram input/editing means comprises a character input means and a graphics input means, and graphical symbols indicating operational functions of the level crossing connection diagram are displayed, A railroad crossing simulation device comprising means for creating and editing a railroad crossing connection diagram by specifying graphic symbols. 3. The level crossing simulation device according to claim 1, wherein the means for inputting operating conditions for the simulation includes means for inputting delay characteristics and indefinite characteristics of relays constituting the level crossing connection diagram. Device.