JPH0439161A - Railroad crossing fixed time control device - Google Patents

Abstract

PURPOSE:To secure railroad crossing fixed time control with the minimum warning time by calculating the number of axles detected by axle detectors, and determining the delay time according to the running state based on the running state obtained from the train speed detected by the detectors. CONSTITUTION:Axle detectors 4, 5 are arranged at a distance L from a railroad crossing 3, and the time when the top vehicle reaches the railroad crossing 3 is obtained according to the running state such as the acceleration or deceleration of a train every time each axle of the train passes the detectors 4, 5. The minimum alarming time is subtracted from this time to determine the delay time according to the running state. The railroad crossing control condition is sent to a railroad crossing device 7 in response to the delay time to activate the railroad crossing device 7. The top vehicle of the train is located at the distance corresponding to the minimum warning time from the railroad crossing 3, and the minimum warning time according to the running state can be secured. During deceleration running, delay running corresponding to it is performed, thus the delay time can be increased, and the delay control is prevented from being interrupted in the middle.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a fixed time control device for level crossings, and is based on the premise that the number of axles per formation and the growth per formation are fixed values, and the number of axles detected by an axle detector is From the number of axles, calculate the distance from the head of the train to the railroad crossing, and use this calculated value, the train speed obtained from the detection signal of the axle detector, and the acceleration detected from the train speed.
The delay time corresponding to the running state of the train is determined from the running state of constant speed and deceleration, and the level crossing control can be performed depending on the running state of the train.

<Prior art> C is a conventional level crossing fixed time control device of this type, which was developed in Japanese Patent Application Laid-open No. 6
The one described in Japanese Patent No. 0-4462 is known.

This prior art generally calculates the time from when the level crossing device is activated until the head of the train reaches the level crossing by the following means.

(b) A pair of axle detectors should be installed in front of the level crossing at a distance shorter than the minimum axle spacing of the train.

(b) Based on the detection outputs of a pair of axle detectors, determine the time required for the same axle to pass between each axle detector for each axle of the train, and then based on this required time and the interval between each axle detector. The train speed is calculated for each axle of the train.

(c) Based on the detection output of one of the axle detectors and the train speed, iteratively calculates the axle spacing between the preceding axle and the following axle that are adjacent to each other.

(d) Every time one axle passes, calculate the total length of the train from the cumulative total of the axle spacing obtained in (c) above.

(e) From the train speed and train length obtained as described above, calculate the activation time from when the train passes the axle detector to when the level crossing device is activated.

<Problem to be Solved by the Invention> According to the above-mentioned prior art, the time from when the level crossing device is activated until the head of the train reaches the level crossing can be accurately and
The advantage is that it can be made constant with high precision.

However, based on the detection output of the axle detector and the train speed, the axle spacing between the leading axle and the following axle that are adjacent to each other is calculated repeatedly, and the total length of the train is calculated from the cumulative total of the axle spacing obtained in this way. Since the calculation process for obtaining the train length is complicated, and high-speed processing is required, there are restrictions on the device configuration.

Furthermore, in consideration of the safety of level crossing control, conventional level crossing fixed time setting devices always ensure that the train runs at maximum power, regardless of whether the train is accelerating, at constant speed, or decelerating. As a premise, the activation time for starting the level crossing device was determined. For this reason, the more the train slows down, the wider the gap between the prediction and the actual situation becomes, posing the problem that rational delay time control becomes impossible.

Furthermore, in conventional delay control that assumes that the train is running at maximum power, when the train is decelerating, axle detection is performed within a preset predicted time to detect when the train has passed. There was also the problem that the delay control was terminated midway when the passage was completed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned conventional problems, simplify the device configuration within a practical range, and
Moreover, it is an object of the present invention to provide a fixed time control device for level crossings that can perform level crossing control depending on the running state of acceleration, constant speed, and deceleration.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention provides a vehicle that has a mutual spacing smaller than the minimum axle spacing of a train along a track, and is separated by a distance that can ensure a minimum warning time. A pair of axle detectors disposed in front of a level crossing, a level crossing fixed time setting device into which a detection signal from the axle detector is input, and a level crossing device operating based on a signal given from the level crossing fixed time setting device. The level crossing fixed time control device has the following: The level crossing fixed time setting device detects the train speed and the number of axles based on the detection signal given from the axle detector, and from the obtained train speed, the train It is assumed that the number of axles per train and the growth of one train are fixed values based on the obtained train speed, number of axles, and running state of the train. Then, each time the train passes one axle over the axle detector, the time required for the front of the train to reach the railroad crossing is calculated according to the train's running condition, and the minimum warning time is subtracted from this time. The present invention is characterized in that a delay time corresponding to a state is determined, and a level crossing control condition for driving the level crossing device is outputted in accordance with the delay time.

<Function> In a normal train, the number of shafts and the growth of one train are fixed. For example, 1 [the number of axes is 4, and the growth of one strand is about 20 m]
It is. Therefore, if this is assumed, the leading position of the train after passing over the axle detector can be calculated by simply counting the number of axles based on the detection signal of the axle detector.

Train speed can be detected from the time required for the same train axle to pass between a pair of axle detectors.

Furthermore, by comparing the train speed obtained last time and the train speed obtained this time, it is possible to detect whether the train is in an acceleration, constant speed, or deceleration state.

Based on the train speed, number of axles, and train running condition obtained as described above, assuming that the number of axles per formation and the growth of one formation are fixed values, it is determined that the train passes one axle over the axle detector. At each time, the time required for the head of the train to reach the railroad crossing is determined according to the running condition of the train, and the minimum warning time is subtracted from this time to determine the delay time according to the running condition.

Then, level crossing control conditions are sent to the level crossing device according to the delay time. This activates the level crossing device. The leading position of the train at this time is at a distance corresponding to the minimum warning time from the railroad crossing, and therefore the minimum warning time corresponding to the running state can be secured.

Further, when the vehicle is decelerating, corresponding delay control is performed, so it is possible to increase the delay time. Therefore, it becomes possible to take a longer time to predict the completion of the passage, and it becomes less likely that the delay control will be terminated midway due to deceleration traveling.

<Example> Fig. 1 is a diagram showing the configuration of a fixed time control device for a level crossing according to the present invention, in which 1 is a track, 2 is a train, 3 is a level crossing, 4 and 5 are a pair of axle detectors, and 6 is a level crossing. The fixed time setting device 7 is a level crossing device.

Train 2 is 1 to ρ with one train growth. It is displayed as an n-car train. In normal train 2, the number of axles in one formation is a fixed number of four, and one train growth train, ~J2. ．． has a fixed length of approximately 20 m.

The axle detectors 4.5 have a mutual spacing a along the track 1 that is smaller than the minimum axle spacing d1 of the train 2 and a minimum warning time Tel. Level crossing 3 with a distance lil L l that can be secured.
is placed in front of.

The level crossing fixed time setting device 6 includes a train speed detection section 61, axle number detection section 62, a train head position calculation section 63, and a running state determination section 6.
4 and a delay time setting section 65. The main part of the level crossing fixed time setting device 6 can be configured by a microcomputer, and in such a case, the block display 6 shown in the figure
1 to 65 are not circuit divisions but divisions indicating processing orders.

The train speed detection section 61 detects the train speed ■ based on the detection signal given from the axle detector 4.5. The train speed V can be detected from the time required for the same axle of the train 2 to pass between the pair of axle detectors 4-5.

The axle number detection section 62 detects the number of axles that have passed over the axle detector 4.5 based on the detection signal given from the axle detector 4 or 5.

The train head position calculation unit 63 calculates the number of axles in the axle number detection unit 6 based on the assumption that the number of axles in one formation, 1g growth, and ~1n are fixed.
This part calculates the leading position of the train 2 that has passed the axle detector 4.5 based on the number of axles obtained in step 2. normal train 2
In, several IWa axially grown gold pieces, 1 piece growth 1, ~ILn
If each is 20m, then the first position of the train! , is obtained as ir = (m/4)x2o (m) (1). For example, as shown in FIG. 2(a), the train 2 that was running in front of the axle detector 4.5 will move in front of the axle detector 4.5 by one car, as shown in FIG. 2(b). 5, the number of axles detected by the axle number detection unit 62 is 4, and the point P on the axle detector 4.5. At the leading position of the train based on , the train head position Ilr becomes AF=ρ1+.In this way, when calculating the train head position °C, the train head position Ilr is
It is only necessary to count the number of axes m based on the detection signal of , and calculate it according to the above-mentioned formula, which makes the process extremely easy.

The train head position calculation unit 63 calculates the train head position x from the number of axles m.
It has a table for calculating r, and calculates the train head position 1F by comparing the number of axles m obtained by the axle number detection unit 62 with this table or by executing the calculation of equation (1). be able to.

The running state determination unit 64 detects whether the train 2 is in an acceleration, constant speed, or deceleration running state based on the detection signal of the train speed V given from the train speed detection unit 61. The running state of train 2 is the train speed ■ obtained last time. 1 and the train speed obtained this time■. It can be detected by comparing with 2.

Train speed VOO obtained the day before last and train speed ■ obtained this time. The driving condition may be determined from a comparison with No. 2.

The delay time setting unit 65 determines whether the train head will reach the level crossing 3 after the train 2 passes over the axle detector 4.5 based on the train speed V, train head position 12, and train running state obtained as described above. The time Ts required to reach this point and the delay time TD obtained by subtracting the minimum alarm time T win from this time Ts are calculated. Alternatively, it may be calculated in advance and set as Qi and Pull.

Here, the time T required for the head of the train to reach level crossing 3
s is calculated taking into consideration the train running states of acceleration, constant velocity, and deceleration. Therefore, from this time Ts to the minimum alarm time T
The delay time TDI obtained by subtracting win is a time depending on the driving state.

In order to ensure the safety and practicality of level crossing control, when accelerating or traveling at a constant speed, delay control is performed on the premise that the train will reach the maximum speed, and when traveling at a constant speed, it will run at a constant speed. It is better to perform delay control based on this assumption.

First, delay control during accelerated running and constant speed running will be explained. In Fig. 1, the head of the train 2 is from the position PO where the axle detector 4.5 is located to the train head position! , the distance II L 2 from the head of the train 2 to the railroad crossing 3 is L2=LI Jlr. The time Ts required for the head of the train 2 to reach the railroad crossing 3 is calculated from this distance III L 2 and the train speed V. Next, referring also to FIG. 3, the calculation of the time Ts will be explained. In FIG. 3, Fl is an acceleration running line, F2 is a constant velocity running line, and F.

indicates the deceleration running line. The distance required to reach the maximum speed V max from the initial speed ■ is 1! f L 2 + and time T
1 is L a + = (V + sa + c' - V 2) / 7.
2 CtTl = (v, 1x-■)/α However, α is acceleration. Next, after reaching the maximum speed VmaX, level crossing 3
The time T2 required to travel to is T2 = (L2
2X3.6)/VIIIIIIX. Therefore, the time Ts required for the head of the train to reach the railroad crossing 3 is calculated as Ts = T, +72.

Although the train speed ■ changes, the axle of train 2 is detected by axle detector 4.
．． 5 can be detected by the speed detecting section 61 every time the axis passes over one axis. Therefore, the above calculation is performed every time the axis passes over one axis, and the delay time is corrected. The difference between this time Ts and the minimum warning time T wa I n determined at the railroad crossing 3 becomes the delay time TDI.

That is, TD+=Ts T-+rl. The level crossing fixed time setting device 3 uses the above-mentioned calculation to
Calculate the delay time TD.

When the vehicle is decelerating, delay control is performed on the assumption that the vehicle is traveling at a constant speed. The time T required for the head of the train to reach the railroad crossing 3 when the train travels at a constant speed V is calculated as Ts=L2/■. The difference between this time T5 and the minimum warning time T specified at railroad crossing 3 is the delay time TDI.
becomes. That is, T D + = T s T win.

The level crossing fixed time setting device 3 outputs level crossing control conditions for driving the level crossing device 7 according to the delay time TD obtained by the above calculation. This activates the level crossing device 7. As the delay time TDI elapses, train 2 reaches the train speed V
The train 2 travels a distance lit L 4 corresponding to , and the head of the train 2 is located at a point P2 corresponding to the minimum warning time T , h, . The distance 11L3 from point P2 to level crossing 3 is the train speed V
This corresponds to the minimum warning time T min when driving at

Although the train speed V changes, the axle of the train 2 is detected by the axle detector 4.
．． Each time the vehicle passes over 5, the speed is detected by the speed detection section 61, and a time T8 and a delay time T Dr are set.

Therefore, it is possible to set the delay time TDI corresponding to the change in the train speed (2) and perform level crossing control that is compatible with the train speed (2). Thereby, the level crossing warning time can be made constant regardless of the train speed 1.

The completion of the passage of train 2 is based on the train speed, acceleration, and maximum axle spacing.The predicted time required from the passing of the -axle to the arrival of the rice grain is determined, and if the axle is not detected within this predicted time. This can be detected by determining that the train has passed when the train has passed.

Here, with conventional delay control that assumes that train 2 runs at maximum power, it is not possible to increase the predicted time. However, in the present invention, when decelerating, the delay control is performed on the assumption that the vehicle is running at a constant speed, so the delay time can be greatly reduced. It is possible to take For this reason, it becomes possible to take a longer prediction time, and it becomes less likely that a situation such as being interrupted midway due to deceleration running will occur.

FIG. 4 shows another embodiment of the level crossing fixed time control device according to the present invention. This embodiment shows an example of a multi-point type in order to improve the accuracy of fixed time control of railroad crossings, and a plurality of sets n, a pair of axle detectors (41, 51) to (4n, 5n) are used.
The axle detectors (41, 51
) to (4n, 5n), a fixed railroad crossing time setting device 60
1 to 60n.

When one level crossing is controlled by a plurality of level crossing fixed time setting devices 601 to 60n, it is desirable from the viewpoint of commonality and standardization of the devices that the level crossing control is performed independently of these level crossing fixed time setting devices 601 to 60n. . However, when the level crossing fixed time setting devices 601 to 60n operate independently, for example, the delay time TDI set by the level crossing fixed time setting device 601 cannot be corrected by the next level crossing fixed time setting device 602. Therefore, according to the level crossing fixed time setting device 602, the delay time TD.

Even if it is possible to perform level crossing control that is delayed even further than the level crossing control, a problem arises in that the level crossing control is performed at the delay time TD set by the level crossing fixed time setting device 601. If the level crossing fixed time setting device 602 provides the control condition for stopping the level crossing alarm control to the level crossing fixed time setting device 601, the above-mentioned problem can be solved. Cables are required, which increases equipment costs.

As another means, a train speed V for performing level crossing alarm control is assigned to each of the level crossing fixed time setting devices 601 to 60n, and when the detected train speed V is less than the value assigned to the level crossing A possible method is to leave the alarm control to the next level crossing fixed time setting device without performing warning control. However, if the vehicle decelerates after passing at a speed higher than the allotted speed, a problem arises in that the railroad crossing warning time is longer than the expected warning time. The embodiment shown in FIG. 4 shows a configuration that can solve this problem.

Each of the level crossing fixed time setting devices 601 to 60n has output relays R1 to Rn that output level crossing control conditions. Respective contacts R11 to Rn of output relays R1 to Rn
1 uses the same cable 8 and its cable line 8
1.82 are inserted and connected in series with each other.

83 and 84 are power supply lines included in the cable 8.

The respective level crossing control conditions of the level crossing fixed time setting devices 601 to Son are determined by the respective contact points R1 of the output relays R3 to Rn.
, ~Rn1, it is input to the level crossing device 7. Output relays R1 to Rn are always operating, and contact R11""
'Rnl is normally lifted up and closed, but falls down and opens when the level crossing control conditions are output.

In addition, except for the level crossing fixed time setting device 601 that should output the level crossing control conditions first, the level crossing fixed time setting devices 602 to 60n
The axle detectors (42, 52) to (4n) to which it belongs are
, 5n) are provided to respond when the axle is detected. Train detection relay S, ~
S1 is normally inactive and is activated when a train is detected.

It is assumed that the contacts Sll to S0 normally fall open and are pulled up and closed when a train is detected.

Contact points Sll to S of train detection relays S1 to S, respectively
When the train is detected, the cable 8 is set so that the contact condition of the output relay of the level crossing fixed time setting device, which outputs the level crossing control conditions one step earlier than the level crossing fixed time setting device to which it belongs, can be ignored. Connect between wires 81-82. for example,
The contact S11 of the train detection relay 31 provided in the level crossing fixed time setting device 602 is set so that the contact condition of the contact point RI1 of the output relay R1 provided in the level crossing fixed time setting device 601 can be ignored. Fixed time setting device 6
The contact S31 of the train detection relay S provided in the fixed time setting device 602 is connected between the lines 81 and 82 of the cable 8 so that the contact condition of the contact R21 of the output relay R2 provided in the fixed time setting device 602 can be ignored. do.

Each of the level crossing fixed time setting devices 601 to 60n has a first
The operation explained in the figure is performed, but due to the above contact configuration,
Furthermore, the following operations are performed.

Of two adjacent level crossing fixed time setting devices, for example, level crossing fixed time setting devices 601 and 602, the output relay R1 of the level crossing fixed time setting device 601, which should output the level crossing control conditions first, outputs the level crossing control conditions. , train 2 is detected on the axle detector 42.52 provided in the later level crossing fixed time setting device 602.
When the contact S11 of the train detection relay 31 is lifted up and closed. For this reason, the previous railroad crossing fixed time setting device 601
The level crossing control condition by the contact point R11 of the output relay R1 will be ignored, and the level crossing control will be performed according to the later level crossing control condition of the level crossing fixed time setting device 602. This makes it possible to operate the level crossing device 7 according to the level crossing control conditions provided by the level crossing fixed time setting device located closer to the level crossing 3, making it possible to perform highly accurate level crossing fixed time control. Become.

Furthermore, each contact R11~ of the output relay R1~Rn
Since the contacts of Rn1 and train detection relays 31 to S are connected by two wires 81 and 82 in the same cable 8,
Including the power supply lines 82 and 83, wiring can be done with a single 4-core or 6-core cable 8, and the cable installation cost is reduced.

<Effects of the Invention> As described above, the present invention provides a fixed time control device for level crossings that determines the leading position of a train necessary for fixed time control at a level crossing on the premise that the number of axles per formation and the growth per train are fixed values. and calculates the number of axles detected based on the detection signal given from the axle detector, and calculates this calculated value, the train speed obtained from the detection signal of the axle detector, and the acceleration detected from the train speed. , constant speed, and deceleration, and the delay time according to the driving condition is determined, so the device configuration can be simplified to the extent that there is no practical problem, and moreover, it can be used for acceleration, constant speed, and deceleration driving. It is possible to provide a level crossing fixed time control device that can perform level crossing control depending on the state.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a level crossing fixed time control device according to the present invention, FIG. 2 is a diagram explaining the calculation of the train head position by the level crossing fixed time control device according to the present invention, and FIG. 3 is a diagram showing the position from the train head. Diagram 4 explaining how to calculate the time required for the head of the train to reach the railroad crossing from the distance to the railroad crossing and the train speed.
The figure is a diagram showing another embodiment of the level crossing fixed time control device according to the present invention. 1... Track 2... Train 3... Level crossing 4.5... Axle detector 6... Level crossing fixed time setting device/Level crossing device

Claims (3)

[Claims] (1) A pair of axle detectors arranged along the track in front of a railroad crossing with a mutual spacing smaller than the minimum axle spacing of the train and at a distance that ensures a minimum warning time; and the axle detector. A level crossing fixed time setting device comprising a level crossing fixed time setting device into which a child detection signal is input, and a level crossing device operating based on the signal given from the level crossing fixed time setting device, the level crossing fixed time setting device detects the train speed and the number of axles based on the detection signal given from the axle detector, and detects whether the train is in an acceleration, constant speed, or deceleration running state from the obtained train speed. From the obtained train speed, number of axles, and running condition of the train, each time the train passes one axle over the axle detector, assuming that the number of axles per formation and the growth of one formation are fixed values, Determine the time required for the leading train to reach the level crossing according to the running condition of the train, subtract the minimum warning time from this time to determine a delay time according to the running condition, and adjust the level crossing device according to the delay time. A fixed time control device for a railroad crossing, characterized in that it outputs railroad crossing control conditions for driving the railroad crossing. (2) A plurality of sets of the pair of axle detectors are provided at intervals, and the level crossing fixed time setting device is provided for each set of the axle detectors. 1. The level crossing fixed time control device according to 1. (3) Each of the level crossing fixed time setting devices includes an output relay that outputs level crossing control conditions, and each of the level crossing fixed time setting devices except for the level crossing fixed time setting device that should output the level crossing control conditions first , a train detection relay that responds to train detection by its own axle detector; contacts of the output relay are connected in series via a cable line; and contacts of the train detection relay respond to train detection at an adjacent level crossing Of the setting devices, before the output relay of the level crossing fixed time setting device that should output the level crossing control conditions first outputs the level crossing control conditions, the train detection relay provided in the later level crossing fixed time setting device starts the train detection operation. is connected between the lines of the cable so that the contact conditions of the output relay provided in the previous level crossing fixed time setting device can be ignored; 3. The level crossing fixed time control device according to claim 2, wherein the control device is connected for input.