JP2521968Y2 - Train position detection device - Google Patents

Description

[Detailed description of the invention] << Industrial application field >> This invention relates to a train position detecting device capable of knowing the current position of a running train on the vehicle.

<Conventional technology> A conventional device that detects the current position of a running train on a vehicle transmits a signal of a different frequency for each point from a ground child or a ground loop, and through a vehicle child provided on the train. The current position is determined based on the received frequency.

Therefore, since the conventional device is a point detection method, in order to be able to finely detect the current position of the train in order to shorten the operation time interval, it is necessary to install the above-described ground child or ground loop and a transmitter. There is a disadvantage in that the number must be increased, and the equipment cost increases.

[Technical Problem to be Solved] Generally, a current always flows through rails constituting a track circuit. Then, the leading axle of the train entering the sectioned rail can receive the current, and the input current value depends on the distance on the rail from the transmission point to the train position.

Focusing on this point, this invention captures the change in the current value received on the car through the train axle of the current flowing in the track circuit, and obtains an on-board device that can accurately calculate the current position, thereby obtaining a ground device. It is an object of the present invention to provide a train position detecting device capable of continuously detecting the current position of a train at a minimum cost for installing the above-mentioned on-board device on a vehicle, using an existing device as it is.

<< Means for Solving the Problems >> In order to achieve the above object, the train position detecting device according to the present invention has (a) an on-vehicle device and a display device, and (b) the on-vehicle device is used for a train. It is equipped with a receiving unit, a pattern storage unit, a calculating unit, and a display driving unit, and the receiving unit transmits a signal transmitted from a transmitter of a track circuit to a rail to a vehicle mounted in front of a train axle. The pattern storage unit is created based on a change pattern of a standard reception level by the reception unit according to a distance on a rail from a transmission point of the block section for each block section. The calculation unit compares the instantaneous reception level of the reception unit with the standard reception level stored in the pattern storage unit, and calculates the train position in the block section. Then, the current train position is calculated by adding the calculated value to the distance of the block section that the train has passed until reaching the block section, and the current train position is calculated. (C) the display is mounted on the train, and displays the current train position under the control of the display drive unit. It is characterized by

<< Operation >> The receiving unit of the vehicle-mounted device having the above configuration receives a signal of a level corresponding to the distance from the transmission point of the track circuit to the current position of the train on the rail configuring the track circuit.

The calculation unit calculates a train position in the block section corresponding to the reception level using the stored pattern, and further calculates a current position of the train.

<< Example >> Hereinafter, the device of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention, and shows a state in which a train A is traveling on a rail 1 in a block section a in the direction of arrow A.

At the beginning of the block section a, a transmitter 2 for transmitting a signal of a predetermined frequency to the rail 1 constituting the track circuit is provided, and at the end of each block section a, a ground receiver 3 is provided. Since the reception state of the receiver 3 becomes high or low depending on the presence or absence of a train in the block section a, the rear block signal or the switch is controlled based on this. .

In the figure, reference numeral 4 denotes an on-vehicle device mounted on the train A, which inputs a signal transmitted from the transmitter 2 via an on-vehicle power receiver 5 mounted in front of the axle of the train. The train position is detected by performing arithmetic processing, and the train position obtained by the vehicle-mounted device 4 is set in the crew room.
The information is displayed on a display 6 composed of a CRT or the like.

FIG. 2 shows an example of the display unit 6,
The position of train A when train A is heading from Instep Station to Otsu Station is indicated by bar 6a. In the illustrated example, the train A is currently located at three-quarters of the distance between Kooto Station.

The display 6 is not limited to the crew room, but may be installed in a cabin or a dining car.

FIG. 3 is a block diagram showing the electrical configuration of the vehicle-mounted device 4. The receiving unit 10 has the same configuration as a well-known terrestrial receiver provided at the end of the block section a, and includes an amplification circuit, a detection circuit, The filter circuit, the relay circuit, the rectifier circuit and the like are connected in series.

A signal transmitted from the transmitter 2 to the divided rails 1 is input to the receiver 10 via the on-board power receiver 5. Then, a signal of a constant level is transmitted from the transmitter 2, but the reception level in the block section a is highest on the start side (transmitter 2 side) that is not attenuated, and is lowest on the end side ( (See FIG. 4). The value of the reception level and its fluctuation tendency are not uniform due to the difference in rail length in the block section, environmental conditions such as weather, etc., for example, the reception level is 200 mA at the start end and 20 mA at the end end.

The calculation unit 11 takes in the output signal of the reception unit 10 and calculates the current position of the train A from the output signal level using the pattern stored in the pattern storage unit 12. That is, the calculation unit 11 is mainly configured by a microcomputer. The pattern storage unit 12 is composed of a semiconductor storage element, and stores a standard reception level of each block section of the operation route of the train A.

FIG. 4 shows an example of the contents stored in the pattern storage unit 12, which is a part between the station A and the station B, and shows patterns of three block sections a ₀ , a ₁ and a _2. ing. The solid line in this figure is a pattern in fine weather, and the chain line is a pattern in rainy weather. The reason why the pattern when it rains is low is that
This is because the leakage of the transmission output from the transmitter 2 from the rail is large. Which pattern is selected may be manually input by a crew member. However, when the reception level when the train A enters a new block section is equal to or lower than a predetermined value (20 mA or lower in the illustrated example), it is indicated by a chain line. The pattern may be automatically selected. It should be noted that since the difference between the patterns in fine weather and in rainy weather is not large, only one type of pattern indicated by a solid line can be used when the demand for the current position detection accuracy of the train is not strict.

The display driving unit 13 controls the driving of the display 6 described above, and is configured to display bars indicating the names of both stations and the current position on the display 6.

 The operation of this embodiment having the above configuration will be described.

Now, it is assumed that the train A is traveling from Instep Station to Otsu Station and is approaching a certain block section a ₀ (see FIG. 4). For this reason, the pattern between the station A and the station B is stored in the pattern storage unit 12 in advance.

The receiving unit 10 receives an output signal from the transmitter 2 installed in each block section, and a peak value is detected each time the signal passes through one block section. The total distance S ₁ m between the passing block section and the section is calculated.

Then, the train A is currently in presence a point c with a block section a _0, the output of the receiving unit 10 at that time (reception level) 90
Assume that the current was mA (see FIG. 4). If the minimum value of the pattern in this section is 20 mA and the maximum value is 200 mA, the pattern is linear, and if the distance in this section is 300 m, the calculation unit
11 indicates the point of the above reception level 90mA from the end of this section.
In addition to calculating 150 m, the distance S ₁ of the block section that has been passed so far is added to 150 m.

On the other hand, since the distance S ₀ between the former and the latter is already known and this value has already been inputted to the calculating unit 11, the division of (S ₁ +150) / S ₀ is performed and the length of the bar 6 a shown in FIG. Is calculated.

The display drive unit 113 displays the bar 6a having the length calculated by the calculation unit 11 on the display 6. Therefore, the tip of the bar 6a indicates the current position of the train A.

In the above-described embodiment, the signal transmitted from the transmitter 2 to the rail 1 is received by the vehicle-mounted device 4, and the position of the train A in the block section is calculated from the received signal and the reception pattern of the block section. Since the current position of the train A is calculated by adding the distance of the passage section that has passed, and this is displayed, the train position can be accurately detected and displayed on the vehicle.

Moreover, since the transmitter 2 can be an existing transmitter for controlling a traffic light or the like, new equipment on the ground is not required. Can be realized.

In the above-described embodiment, the train position is displayed as a bar. However, a digital display, for example, a distance between both stations may be used as a denominator, and a distance passed up to the present time may be used as a numerator.

<< Effect of the Invention >> The train position detection device according to the invention receives a signal transmitted from the transmitter to the track circuit by the on-vehicle device, and receives the received signal and the pattern set in advance for the block section. Since the current position is calculated by detecting the position of the train in the block section and displaying the current position, the current position of the train can be continuously and accurately calculated at low cost using the track circuit. You can know.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention, and FIG.
FIG. 3 is a detailed diagram showing an example of the display device, FIG. 3 is a block diagram showing an electrical configuration of the vehicle-mounted device, and FIG. 4 is a diagram showing an example of a pattern in one block section. a ... block section, 1 ... rail, 2 ... transmitter, 3 ...
... on-vehicle device, 5 ... on-board power receiver, 6 ... display, 10 ... receiving unit, 11 ... arithmetic unit, 12 ... pattern storage unit, 13 ... display drive unit, A ... train.

Claims (1)

(57) [Scope of request for utility model registration] (1) The vehicle-mounted device has a vehicle-mounted device and a display device. (B) The vehicle-mounted device is mounted on a train, and includes a receiving unit, a pattern storage unit, a calculation unit, and a display driving unit. The receiving unit is for receiving a signal transmitted from the transmitter of the track circuit to the rail from an on-board power receiver attached in front of the axle of the train, and the pattern storage unit is configured to block the block for each block section. A pattern created based on a change pattern of a standard reception level by the receiving unit according to a distance on a rail from a transmission point of the section, and the calculation unit stores the reception of the reception unit every moment. The level is compared with the standard reception level stored in the pattern storage unit to calculate the train position in the block section, and the calculated value indicates the distance of the block section that the train has passed before reaching the block section. The display drive unit controls the display of the current train position calculated by the calculation unit on the display unit. (C) The display unit A train position detecting device mounted on a train to display a current train position under the control of the display drive unit.