JP7311854B2 - Control section length measuring device and control section length measuring system for railroad crossing controller - Google Patents

Description

The present invention relates to a device and system used to measure the control section length of a railroad crossing controller, and more particularly, to a railroad crossing controller control section length measuring device and control section that can measure without using an electrical inspection car or a rail short circuit. Regarding the length measurement system.

As a railroad crossing control device that operates a railroad crossing device such as a railroad crossing gate and a railroad crossing alarm when a train passes through the railroad crossing, for example, railroad crossing controllers installed at both ends of a predetermined section across the railroad crossing control the train. Some railroad crossing devices are controlled according to changes in voltage or current output when detected.
The level crossing controller has a range (control section) in which train detection is possible. The level crossing alarm of the level crossing control device is activated by activating the installed controller reaction relay, and when the train moves out of the train detection range of the level crossing controller, the output voltage returns to normal and the relay stops operating. is controlled to end the railroad crossing warning.

A railroad crossing controller that detects the entry or exit of a train is a type of track circuit, and the train is within the train detection range (control section) of the closed circuit type railroad crossing controller (HC type) installed at the start point of a predetermined section. When it detects that a train is entering the station, it activates the starting point reaction relay (dropping the relay contact). In addition, when the train detects that the train is entering the train detection range of the open circuit type railroad crossing controller (HO type) installed at the end point of the predetermined section, the terminal point reaction relay is operated in the opposite state (relay contact It is configured to allow the

In the railroad crossing control device using the controller as described above, a predetermined distance (for example, 30 m) is defined for the width of the train detection range (hereinafter referred to as "control section length"), and the performance of the railroad crossing controller is As it falls, the control section length becomes shorter and it becomes difficult to detect the train. Therefore, in order to prevent the railroad crossing controller from malfunctioning due to the deterioration of the train detection performance of the railroad crossing controller, inspection work is performed to periodically measure the control section length of the railroad crossing controller. Such inspections are generally performed by electric inspection cars, but on routes on which electric inspection cars do not run, they are manually performed using rail short circuits.

Conventionally, in the manual measurement of the control section length, a track shunt circuit is used to short-circuit the track circuit by short-circuiting between two rails, and the axle of the train short-circuits the track circuit of the railroad crossing controller. The control section length of the railroad crossing controller was measured by confirming the operation of the railroad crossing controller by making the same condition as the above and moving the location of the short-circuit between the two rails while sounding the railroad crossing alarm. . In this method of measuring the length of the control section, the personnel who operate the short circuit, the personnel who check the change in the output voltage of the level crossing controller, the personnel who stop the ringing of the level crossing alarm triggered by the change in the output voltage of the controller, the traffic There is a problem that a large number of personnel are required, such as personnel for organizing.

Therefore, a motion detecting means for detecting a state of detection of a train by a railroad crossing controller, a time measuring means for measuring the time during which the railroad crossing controller detects a train based on the detection result detected by the motion detecting means, a train and a control section length calculation means for calculating the length of the control section based on the time measured by the time measurement means and the running speed of the train measured by the speed measurement means. An invention related to a control section length measuring system has been proposed (see Patent Document 1).

and a train detection state detection unit, a train detection time measurement unit, an extreme point detection unit, an extreme point interval measurement unit, a train speed calculation unit, and a control section length calculation unit. The section measures the time during which the level crossing controller detects a train based on the detection result of the train detection state detection section, and the extreme point interval measurement section measures the extreme value of the track transmission voltage detected by the extreme point detection section. The time interval between points is measured, the train speed calculation unit calculates the speed of the train based on the extreme point interval measured by the extreme point interval measurement unit, and the control section length calculation unit calculates the train detection time measurement unit An invention related to a railroad crossing control section length measuring device that calculates the control section length based on the train detection time measured by and the train speed calculated by the train speed calculation unit has also been proposed (see Patent Document 2).

JP 2011-73645 A JP 2018-192922 A

However, the invention of Patent Document 1 measures the train speed used to calculate the control section length using a speed measuring device such as a speed gun, so the speed measuring device is installed near the track. It is necessary to remove and remove the control section, and the manpower required for measuring the length of the control section cannot be sufficiently reduced. Moreover, if the speed measuring device is a permanent device, the system becomes large-scaled, resulting in an increase in cost.

In addition, the invention of Patent Document 2 measures the track transmission voltage output by the railroad crossing controller and calculates the average speed from the time interval of the maximum value of the voltage waveform. However, if the train to be measured is accelerating or decelerating in the control section, the accuracy of the control section length calculated from the calculated speed and train detection time is reduced. In addition, although some trains running on a railroad crossing to be measured have different types of cars constituting a train set, the invention of Patent Document 2 unifies the length of the cars of the train used for calculating the control section length to 20 m. However, since it does not take into consideration that different types of vehicles travel, there is a problem that it is not possible to calculate the control section length with high accuracy when different types of vehicles travel.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and its object is to provide a control section length measuring device and a control section length measuring system for railroad crossing controllers capable of reducing the manpower required for the measurement work. is to provide
Another object of the present invention is to calculate the control section length with high accuracy even when the train to be measured is accelerating or decelerating in the control section or when trains made up of different types of vehicles are running. It is an object of the present invention to provide a control section length measuring device and a control section length measuring system for railroad crossing controllers.

In order to solve the above problems, the present invention
current measuring means for measuring the value of the current flowing from the railroad crossing controller to the rail;
A control section length measuring device comprising: arithmetic processing means for calculating the length of the control section of the railroad crossing controller based on the current measurement value of the current measuring means,
The arithmetic processing means is
extreme point extracting means for extracting extreme points of the current value measured by the current measuring means;
Based on the information of the extracted extreme points, the time from the start point and the end point of the control section of the railroad crossing controller to the nearest extreme point, and the time from the first extreme point to the second extreme point. transit time calculating means for calculating the time and the time from the last extremum point to the extremum point immediately before that;
A train entry speed Va into the control section is calculated from the time from the first extreme point to the second extreme point calculated by the passage time calculating means and the distance between the axles of the vehicle passing through the control section. a train speed calculation unit for calculating a train advancing speed Vb from the control section from the time from the last extremum point to the immediately preceding extremum point and the distance between the axles;
From the calculated train entry speed Va, the required time Ta from the start point of the control section to the first extreme point, the train exit speed Vb, and the required time Tb from the last extreme point to the end point of the control section,
Lx=Va*Ta+Vb*Tb
and a control section length calculator for calculating the length Lx of the control section using the following equation.

According to the control section length measuring device configured as described above, the train entry speed into the control section and the train exit speed from the control section are calculated based on the waveform of the current value flowing from the railroad crossing controller to the rail. , Since the length of the control section is calculated from the calculated train entry speed and train departure speed, it is possible to reduce the manpower required for the measurement work, and when the train to be measured is accelerating or decelerating in the control section It is possible to calculate the control interval length with high accuracy even in the case of

Here, desirably, information relating to a relay operating voltage output from a railroad crossing control device is input to the arithmetic processing means,
The passage time calculating means calculates the time from the start point and the end point of the control section to the nearest extremum point, using the rise time and the fall time of the relay operating voltage as the timing of train entry and train departure in the control section. configured to calculate

According to the above configuration, since the information about the relay operating voltage output from the railroad crossing control device is input to the arithmetic processing means, the arithmetic processing means determines the rise time and the fall time of the relay operation voltage to the train in the control section. As the timing of entry and exit of a train, it is possible to calculate the time from the start point and end point of the control section detected by the railroad crossing control device to the nearest extreme point. Therefore, even if the characteristics of the level crossing controller installed at the level crossing are different for each level crossing to be measured, it is possible to accurately determine the timing of entry and exit, thereby achieving a highly accurate control section length. Calculations can be made.

In addition, desirably, the arithmetic processing means includes a vehicle determination section that determines a composition of vehicles constituting a train running in the control section from the number of extreme points extracted by the extreme point extraction means; a storage means for storing the distance between the axles of the vehicles in the train set,
The train speed calculation unit reads out from the storage means the inter-axle distance corresponding to the train set determined by the vehicle determination unit, and calculates the train entry speed into the control section and the train exit speed from the control section. configured to calculate
According to this configuration, even if the distances between the axles of the vehicles constituting the plurality of trains running on the railroad crossing to be measured are different, the approach speed and the exit speed are calculated according to the distances between the axles of the vehicles. It is possible to calculate a control section length with a high

In addition, another invention of the present application is
a measuring device having current measuring means for measuring a current value flowing from a railroad crossing controller to a rail; and communication means capable of transmitting the current value measured by the current measuring means;
A control section having arithmetic processing means for calculating the length of the control section of the railroad crossing controller based on the current measurement value of the current measurement means, and receiving means capable of receiving the current measurement value transmitted by the communication means. A control section length measurement system comprising a length calculation device,
The arithmetic processing means is
extreme point extracting means for extracting extreme points of the current value measured by the current measuring means;
Based on the information of the extracted extreme points, the time from the start point and the end point of the control section of the railroad crossing controller to the nearest extreme point, and the time from the first extreme point to the second extreme point. transit time calculating means for calculating the time and the time from the last extremum point to the extremum point immediately before that;
Calculate the train entry speed Va into the control section from the time from the first extreme point to the second extreme point calculated by the passage time calculating means and the distance between the axles of the vehicle passing through the control section a train speed calculation unit for calculating a train advancing speed Vb from the control section from the time from the last extremum point to the immediately preceding extremum point and the distance between the axles;
From the calculated train entry speed Va, the required time Ta from the start point of the control section to the first extreme point, the train exit speed Vb, and the required time Tb from the last extreme point to the end point of the control section,
Lx=Va*Ta+Vb*Tb
and a control section length calculator for calculating the length Lx of the control section using the following equation.

According to the control section length measurement system having the configuration described above, a control section length calculation device is installed for each railroad crossing to be measured, or a control section length calculation device is brought to the site each time the railroad crossing to be measured changes. Since there is no need to install such devices, it is possible to suppress cost increases and reduce the manpower required for the measurement work.

Here, desirably, the measuring device has a function of acquiring a relay operating voltage output from the railroad crossing control device and transmitting information about the relay operating voltage to the arithmetic processing means through the communication means,
The arithmetic processing means receives information on the relay operating voltage transmitted from the measuring device by the receiving means,
The passage time calculating means uses the rising time and the falling time of the received relay operating voltage as the timings of train entry and train departure in the control section, and the time from the start point and the end point of the control section to the nearest extreme point. Configure to calculate time.

According to this configuration, since the information about the relay operating voltage output from the railroad crossing control device is input from the measuring device to the control section length calculating device, the arithmetic processing device of the control section length calculating device determines the rising time point of the relay operating voltage. Using the trailing edge as the timing of train entry and departure from the control section, the time from the start and end points of the control section detected by the railroad crossing control device to the nearest extreme points can be calculated, resulting in highly accurate control. Interval length calculation can be performed.

According to the control section length measuring device for a railroad crossing controller according to the present invention, it is possible to reduce the manpower required for the measuring work. In addition, there is an effect that it is possible to calculate the control section length with high accuracy even when the train to be measured is accelerating or decelerating in the control section or when trains consisting of different types of vehicles are running. .

1 is a schematic diagram showing the configuration of a railroad crossing control system to which a control section length measuring device according to the present invention is applied; FIG. 1 is a functional block diagram showing the configuration of a control section length calculation device for a railroad crossing controller that constitutes a control section length measuring device according to an embodiment of the present invention; FIG. FIG. 4 is a diagram showing changes in controller transmission current and relay operating voltage when a train passes through a section controlled by a railroad crossing controller; FIG. 10 is a diagram for explaining how the controller transmission current changes with changes in train position (at the time of detection of local maximum point P1); FIG. 10 is a diagram for explaining the correspondence relationship between the extreme points of the controller transmission current and the position of the train (at the time of detection of the maximum point P2); FIG. 10 is a diagram for explaining the correspondence relationship between the extreme points of the controller transmission current and the position of the train (at the time of detection of the maximum point P4); FIG. 10 is a diagram for explaining the correspondence relationship between the extreme points of the controller transmission current and the position of the train (at the time of detection of the maximum point P3);

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
A railroad crossing control system to which the control section length measuring device according to the present invention is applied, as shown in FIG. HC-type railroad crossing controller 12A and HO-type railroad crossing controller 12B are arranged at predetermined distances from each other. to the railroad crossing control device 11, and the internal relay is dropped or lifted.

In FIG. 1, the arrow A indicates the direction in which the train is traveling. An open-circuit type HO type railroad crossing controller 12B is arranged in the .
The HC-type railroad crossing controller 12A transmits an AC signal to the rail R via a pair of cables and receives it via a pair of cables connected to a slightly distant portion, thereby detecting the presence or absence of a train. When a train is on the track, it can no longer receive AC signals and detects the passing of the train. On the other hand, the HO type railroad crossing controller 12B transmits an AC signal to the rail R via a pair of cables. to detect.

In order to operate the voltage detection type HC type railroad crossing controller 12A, an alternating current power supply voltage (AC) is supplied to the HC type railroad crossing controller 12A via a cable 15A from a power supply device 14 disposed near the railroad crossing. A DC power supply voltage (DC) is supplied via a cable 15B to the current detection type HO type railroad crossing controller 12B.
In the railroad crossing control system of the present embodiment, a current measuring device 21 for measuring the current flowing from the HO railroad crossing controller 12B to the rail R is provided in the vicinity of the HO railroad crossing controller 12B. The current measuring device 21 has a communication means, and the current value measured by the current measuring device 21 and the information on the relay operating voltage of the railroad crossing controller 12B are transmitted to the control section length calculating device 22 via the communication network 16. , the control section length is calculated by the control section length calculating device 22 .

Although not shown, the current measuring device 21 is also supplied with a DC power supply voltage (DC) from the power supply 14 through a cable. A current measuring device for measuring the current flowing to the rail R is also provided on the side of the HC type railroad crossing controller 12A. The section length calculation device 22 is configured to calculate the control section length.
In this embodiment, the current measuring device 21 and the control section length calculation device 22 constitute the control section length measurement system. Alternatively, the current measuring device 21 and the control section length calculating device 22 may be directly connected by a cable or the like to form a control section length measuring device.
Also, the current measuring device 21 may be configured as a voltage measuring device.

FIG. 2 shows a functional block diagram of the control section length calculating device 22. As shown in FIG.
As shown in FIG. 2, the control section length calculation device 22 of the present embodiment includes a current measurement value receiving unit 23 that receives a current measurement value from the current measuring device 21 via the communication network 16, and a calculation unit comprising a microcomputer and the like. It has a processing unit 24, a storage unit (database) 25 for storing data necessary for calculating the control section length, and an output unit 26 consisting of a monitor such as an LCD (liquid crystal display panel) for displaying the calculation result or a printer. . The storage unit 25 stores table data showing the relationship between the number of vehicles of a train (set) running on a route on which a railroad crossing to be measured exists and the distance between the axles of the vehicles.

The arithmetic processing unit 24 includes an extreme point extraction unit 41 for extracting an extreme point (maximum value or minimum value) from the waveform of the current value received by the current measurement value receiving unit 23 (see FIG. 3); A transit time calculation unit 42 that calculates the transit time of the train (exactly the axle) from the extremum points, and determines the type of vehicle that constitutes the train (set) from the characteristics of the waveform such as the number of extremum points extracted. A vehicle determination unit 43, an axle distance acquisition unit 44 that reads an axle distance Ls from the storage unit 25 according to the determined vehicle type, and a train speed based on the acquired axle distance and the calculated transit time. and a control section length calculation section 46 for calculating the control section length from the calculated train speed and passage time. The storage unit 25 may store implementation timetable information and train (set) information, and the vehicle determination unit 43 may refer to the implementation timetable and determine the type of vehicle from the passage time of the train.

Next, a specific method of calculating the control section length by the control section length calculating device 22 will be described with reference to FIGS. 3 to 7. FIG.
FIG. 3 shows changes in the level crossing controller output current Is measured by the current measuring device 21 and changes in the relay operating voltage Vr generated in the level crossing control device 11 when the train runs in the control section. The current value Is in FIG. 3 is for a two-car train running, each car having a bogie at the front and rear, and each bogie having two axles with wheels at both ends. . In FIG. 3, the horizontal axis represents time, t1 represents the timing at which the leading axle of the front vehicle enters the control zone, and t2 represents the timing at which the rearmost axle of the rear vehicle exits the control zone. .

The maximum points (peaks) P1, P2, P3, and P4 of the waveform of the sending current Is appear at the timing when each axle passes through the point at which the cable for sending the current to the rail, ie, the current sending point, respectively. For example, as shown in FIG. 4, P1 is the timing at which the leading axle of the preceding vehicle passes the current delivery point. Therefore, Ta corresponds to the required time from when the leading axle enters the control section to when it reaches the current delivery point. P2 is the timing at which the axle of the truck on the rear side of the front vehicle passes the current sending point, as shown in FIG.

Therefore, T1 is the time required from when the leading axle of the front vehicle passes the current delivery point to when the axle of the rear bogie of the front vehicle passes the current delivery point. Therefore, if the axle-to-axle distance Ls is known, the vehicle speed Va when the preceding vehicle is passing the current sending point can be calculated by the formula Va=Ls/T1.
Furthermore, if the vehicle speed Va when the preceding vehicle passes the current delivery point is known, this speed Va and the required time Ta from when the leading axle enters the control section to when it reaches the current delivery point are calculated. Therefore, the distance La from the starting point of the control section to the current sending point can be calculated from the formula Va×Ta.

Similarly, P4, as shown in FIG. 6, is the timing at which the rearmost axle of the rear vehicle passes the current delivery point, and Tb is the timing at which the rearmost axle passes the current delivery point and exits the control section. equivalent to the time required to Further, P3 is the timing when the axle of the bogie on the front side of the rear vehicle passes the current sending point, as shown in FIG.
Therefore, T2 is the time required from when the axle of the front bogie of the rear car passes the current delivery point to when the rearmost axle of the rear car passes the current delivery point. Therefore, using the distance Ls between the axles, the vehicle speed Vb when the rear vehicle is passing the current sending point can be calculated by the formula Vb=Ls/T2.

Furthermore, if the vehicle speed Vb when the rear vehicle passes the current delivery point is known, this speed Vb and the required time from when the rearmost axle of the rear vehicle passes the current delivery point until it exits the control section can be calculated. The distance Lb from the current sending point to the end point of the control section can be calculated from the time Tb and the formula Vb×Tb. The control section length Lx of the HO type railroad crossing controller 12B can be calculated by the formula Lx=La+Lb.
The above calculation method has been explained by taking the case of a two-car train as an example, but even if the train consists of three or more cars, the same calculation as above can be performed for the leading car and the last car. , the control section length Lx can be calculated by the formula Lx=La+Lb

In the above embodiment, the vehicle speed and the control section length Lx are calculated based on the timing at which the axle passes the current delivery point. The waveform of the current Is fluctuates up and down in the vicinity of the maximum points (peaks) P1, P2, P3, and P4 because each truck has two axles. , P2, P3, and P4 have two peaks. In the case of such a vehicle, the vehicle speed and the control section length Lx may be calculated based on the timing at which the middle of the two mountains, that is, the center of the bogie passes through the current sending point.

In addition, in the HC-type railroad crossing controller 12A of the AC detection type provided upstream of the railroad crossing, the peak corresponding to the axle is more likely to appear in the waveform of the measured value of the voltage to be sent than to the current to be sent. Extremum points of the voltage waveform are extracted to determine the axle passage timing, and from the required passage times Ta and T1, the speed Va at the time of train entry and the distance La from the voltage sending point are calculated, and the required passage time Tb. , T2, the speed Vb at the time of departure of the train and the distance Lb from the voltage sending point are calculated, and the control section length Lx is calculated from La+Lb.

Furthermore, in the above embodiment, the method of calculating the control section length of the railroad crossing controller based on one run of the train has been described. The necessity of maintenance may be determined based on the average value of the section lengths.
As described above, in the above embodiment, the vehicle speed when the train enters the section controlled by the railroad crossing controller and the vehicle speed when the train leaves the controlled section are calculated to calculate the length of the controlled section. Therefore, even if the train accelerates or decelerates in the control section, the control section length can be calculated with high accuracy.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in the above embodiment, information on the relay operating voltage Vr generated in the railroad crossing controller is transmitted to the control section length calculation device 22 together with the railroad crossing controller output current Is measured by the current measuring device 21. Information on the relay operating voltage is not transmitted, and the control section length calculator 22 has a threshold value for determining the control section entry point and exit point based on the current measurement value. It may be configured to calculate the control section length by calculating the time.

11 railroad crossing control device 12A HC type railroad crossing controller 12B HO type railroad crossing controller 21 current measuring device 22 control section length calculation device 23 current measurement value receiving unit 24 arithmetic processing unit 25 storage unit 26 output unit 41 extreme point extraction unit 42 passage Time calculation unit 43 Vehicle determination unit 44 Center distance acquisition unit 45 Train speed calculation unit 46 Control section length calculation unit

Claims (6)

current measuring means for measuring the value of the current flowing from the railroad crossing controller to the rail;
A control section length measuring device comprising: arithmetic processing means for calculating the length of the control section of the railroad crossing controller based on the current measurement value of the current measuring means,
The arithmetic processing means is
extreme point extracting means for extracting extreme points of the current value measured by the current measuring means;
Based on the information of the extracted extreme points, the time from the start point and the end point of the control section of the railroad crossing controller to the nearest extreme point, and the time from the first extreme point to the second extreme point. transit time calculating means for calculating the time and the time from the last extremum point to the extremum point immediately before that;
A train entry speed Va into the control section is calculated from the time from the first extreme point to the second extreme point calculated by the passage time calculating means and the distance between the axles of the vehicle passing through the control section. a train speed calculation unit for calculating a train advancing speed Vb from the control section from the time from the last extremum point to the immediately preceding extremum point and the distance between the axles;
From the calculated train entry speed Va, the required time Ta from the start point of the control section to the first extreme point, the train exit speed Vb, and the required time Tb from the last extreme point to the end point of the control section,
Lx=Va*Ta+Vb*Tb
and a control section length calculator for calculating the length Lx of the control section using the following equation: Information about the relay operating voltage output from the railroad crossing control device is input to the arithmetic processing means,
The passage time calculating means calculates the time from the start point and the end point of the control section to the nearest extremum point, using the rise time and the fall time of the relay operating voltage as the timing of train entry and train departure in the control section. 2. The device for measuring the control section length of a railroad crossing controller according to claim 1, wherein the control section length is calculated. The arithmetic processing means includes: a vehicle determination unit that determines a formation of vehicles constituting a train running in the control section from the number of extreme points extracted by the extreme point extraction means; and a storage means for storing the distance between
The train speed calculation unit reads out from the storage means the inter-axle distance corresponding to the train set determined by the vehicle determination unit, and calculates the train entry speed into the control section and the train exit speed from the control section. 3. The device for measuring the control section length of a railroad crossing controller according to claim 1, wherein the length is calculated. a measuring device having current measuring means for measuring a current value flowing from a railroad crossing controller to a rail; and communication means capable of transmitting the current value measured by the current measuring means;
A control section having arithmetic processing means for calculating the length of the control section of the railroad crossing controller based on the current measurement value of the current measurement means, and receiving means capable of receiving the current measurement value transmitted by the communication means. A control section length measurement system comprising a length calculation device,
The arithmetic processing means is
extreme point extracting means for extracting extreme points of the current value measured by the current measuring means;
Based on the information of the extracted extreme points, the time from the start point and the end point of the control section of the railroad crossing controller to the nearest extreme point, and the time from the first extreme point to the second extreme point. transit time calculating means for calculating the time and the time from the last extremum point to the extremum point immediately before that;
A train entry speed Va into the control section is calculated from the time from the first extreme point to the second extreme point calculated by the passage time calculating means and the distance between the axles of the vehicle passing through the control section. a train speed calculation unit for calculating a train advancing speed Vb from the control section from the time from the last extremum point to the immediately preceding extremum point and the distance between the axles;
From the calculated train entry speed Va, the required time Ta from the start point of the control section to the first extreme point, the train exit speed Vb, and the required time Tb from the last extreme point to the end point of the control section,
Lx=Va*Ta+Vb*Tb
and a control section length calculation unit that calculates the length Lx of the control section using the following equation. The measuring device has a function of acquiring a relay operating voltage output from the railroad crossing control device and transmitting information about the relay operating voltage to the arithmetic processing means through the communication means,
The arithmetic processing means receives information on the relay operating voltage transmitted from the measuring device by the receiving means,
The passage time calculating means uses the rising time and the falling time of the received relay operating voltage as the timings of train entry and train departure in the control section, and the time from the start point and the end point of the control section to the nearest extreme point. 5. The control section length measuring system for a railroad crossing controller according to claim 4, wherein the time is calculated. The arithmetic processing means comprises: a vehicle determination section that determines types of vehicles constituting a train traveling in the control section from the number of extreme points extracted by the extreme point extraction means; and axles of a plurality of types of vehicles. and a storage means for storing the distance between
The train speed calculation unit reads the inter-axle distance corresponding to the type of vehicle determined by the vehicle determination unit from the storage means, and calculates the speed of the train entering the control section and the speed of the train leaving the control section. 6. The control section length measuring system for a railroad crossing controller according to claim 4 or 5, wherein the length of the railroad crossing controller is calculated.

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