JP6877914B2 - Train control - Google Patents

Description

The present invention relates to a train control device, and more particularly to a train control device that identifies a carrier wave that has undergone amplitude modulation processing and phase modulation processing based on train speed limit information or the like.

FIG. 4 shows a train control signal transmitted from the ground device 20 to the on-board device 30 in the train control device 1 according to the present invention. In the automatic train control device (hereinafter referred to as ATC device), an ATC signal, which is a train control signal of the train 21, is transmitted from the ground device 20 provided on the ground side to the on-board device 30 provided on the train side. The train. Then, the on-board device 30 that receives the ATC signal controls the train 21 based on the speed limit information of the train 21 included in the signal.

In the ATC device, for the ATC signal transmitted from the ground device 20 to the on-board device 30, for example, a method of modulating a carrier wave by a modulation wave assigned to the speed limit information of a train is generally adopted. The number of modulated waves, that is, the number of speed limit information, cannot be adopted in large numbers due to restrictions on the selection of variable frequencies. Therefore, as a means for increasing the types of speed limit information, two types of carrier waves having different frequencies are amplitude-modulated with the modulation signals assigned to the respective speed limit information, and the receiving side identifies the signals and identifies the signals. A method of acquiring a large amount of information by combining the identified modulated signals is adopted. Here, the information on which the carrier wave is modulated is referred to as "main information", and the information on which the carrier wave is phase-processed is referred to as "secondary information".

In Patent Document 1, as described above, the amount of information is increased to ATC (Automatic Train Control) or ATS (Automatic Train Stop) as an example of a method of acquiring a large amount of information by combining identified modulated signals. The ground-to-vehicle information transmission device that can be used is disclosed. This ground-to-vehicle information transmission device transmits the carrier wave by amplitude-modulating it with a code signal that becomes automatic train control information or automatic train stop information on the ground, and receives and demodulates the amplitude-modulated modulated wave on the vehicle. It is described that this code signal is detected.

On the other hand, as a method of realizing even more information on one carrier wave, a method of changing the carrier phase difference between adjacent marks of amplitude modulation and using the amount of change in the phase difference as speed limiting information is patented. It is proposed in Document 2. The carrier phase difference between adjacent marks of this amplitude modulation is changed, and the phase difference is used as speed limiting information.

Patent Document 2 discloses a train control device suitable for an ATC device that can easily increase the amount of information from a ground device to an on-board device. Here, the train control device detects the phase of the signal received from the ground device and the phase modulation processing means provided in the ground device that modulates the phase of the carrier wave with a predetermined phase corresponding to the sub information different from the main information. It has a phase detecting means provided in the on-board device, a sub-information extracting means for extracting the sub-information corresponding to the detected phase, and a train controlling means for controlling the train based on the extracted sub-information. Is described.

_{FIG. 5 shows the generation process of the carrier wave (f 0} ), the modulated wave (f ₁ , f ₂ ) and the like, which are train control information in the ground device 20. FIG. 5A shows a carrier wave (f ₀ ) having a predetermined frequency generated in the ground device 20. Further, FIG. 5B shows pulse-shaped modulated waves (f ₁ , f ₂ ) that _{amplitude-modulate the carrier wave (f 0).} Of these, the modulated wave (f ₁ ) is one train control signal transmitted from the ground device 20 to the on- _{board device 30, and the modulated wave (f 2} ) is another train control signal. However, the number of train control signals is not limited to this.

FIG. 5 (c) shows _{a signal obtained by amplitude-modulating a carrier wave (f 0} ) with a modulated wave (f ₁ , f ₂ ), and the waveform appears in the form of an intermittent signal. Of these intermittent signals, _{the signal portion corresponding to the modulated wave (f 1} ) is one transmission signal, and _{the portion corresponding to one cycle of the modulated wave (f 1} ) is one train control signal (F). ₁ ). Further, the signal portion corresponding to the modulated wave (f ₂ ) is another transmission signal, and the portion corresponding to one cycle of _{the modulated wave (f 2 ) is the modulated wave (F 2} ) which is another train control signal. ..

The ATC signal, which is the train control information described above, includes "signal display", which is a condition indicated by the signal, as train speed information. This "signal display" includes, for example, signal display such as "stop signal", "progress signal", and "warning signal", as well as the speed limit of the train when the train enters a section protected by the signal. There is a signal display that gives detailed instructions. The safety of the train course is guaranteed by these signal indications. When instructing the train to the train speed limit by this signal display, the case of instructing a lower speed is called "low-level display", and the case of instructing a higher speed is called "high-level display".

JP-A-59-167129 Japanese Unexamined Patent Publication No. 2008-13043

When the phase difference is used as one piece of information, it may be affected by noise or the like and affect the detected phase difference. Therefore, it is necessary to establish a method for ensuring the safety of the phase difference detected in the on-board device when discriminating the phase difference.

An object of the present application is to solve such a problem and to provide a train control device capable of ensuring the safety of the receiving side in determining the phase difference of the phase information of the amplitude modulated signal transmitted from the transmitting side.

To achieve the above object, the train control device according to the present invention, there is provided a train control apparatus for identifying by Ri modulated treated carrier phase information, the value of the phase information, high current-or low current- When the low-order indication is detected, the phase information is adopted when the phase difference between adjacent waveforms of the carrier wave exceeds a predetermined number of times within a preset allowable value. When a high-level indication is detected, the phase information is adopted when the number of times is greater than the number of durations and is within the preset allowable value .

With the above configuration, the determination condition is applied to the phase difference of the waveforms adjacent to the carrier wave for determination. As a result, even if the detected phase difference is affected by noise or the like, it can be accurately determined whether or not the detected phase difference can be adopted.

Further, it is preferable that the train control device according to the present invention determines that the phase difference can be adopted when the phase difference between adjacent waveforms of carrier waves is within a preset allowable value range. As a result, an allowable range is set for the phase difference of the adjacent waveforms of the carrier waves, and if it is determined that the detected phase difference exceeds this specified allowable range, the phase difference information is discarded without being adopted. To do. According to this determination condition, the receiving side can ensure the safety in determining the phase difference. In this safety determination condition, it may be determined that there is no phase information when the detected phase difference exceeds the specified allowable range by a predetermined number of times.

In order to achieve the above object, the train control device according to the present invention is a train control device that identifies a carrier wave that has undergone phase modulation processing based on information, and when phase information corresponding to a low-level indication is detected from the carrier wave, It is characterized in that the conditions for using the phase information are different from those in the case where the phase information corresponding to the high-level display is detected.

The operation to the high-level indication has less influence on the train operation even if the discrimination time is longer than the operation to the low-level indication. That is, when changing to a higher speed, the speed is increased, so the detection time is slightly increased. There is no problem even if it becomes long. However, if you want to change to a lower speed, the detection time for the operation time is related to brake operation time is shorter is better. Therefore, according to the above configuration, the safety can be more rationally improved by making the usage conditions of the phase information different between the operation for the high-level display and the operation for the low-level display.

Further, in the train control device according to the present invention, whether the value of the phase information is the high-level display or the low-level display is assigned according to the height of the angle, and when the phase information corresponding to the low-level display is detected, the carrier wave When the phase difference of adjacent waveforms exceeds a predetermined number of times within a preset tolerance range, phase information is adopted, and when phase information corresponding to high-level indication is detected, low-level information is used. It is preferable to adopt the phase information when the number of times is larger than the indicated number of times of adoption and is within the preset allowable value. Thereby, it is possible to reasonably distinguish between the operation to the higher indication, which has less influence on the train operation, and the operation to the lower indication, which has a greater influence on the train operation.

Further, the train control device according to the present invention preferably has no phase information when the phase difference or phase information of the carrier wave cannot be discriminated. Then, when the phase cannot be determined, "no sub-information" is set as the lowest display corresponding to the modulated wave which is the main information. As a result, when the phase information of the phase-modulated carrier wave cannot be determined, the speed limit on the safe side is applied to the train, and the safety in train operation is guaranteed.

As described above, according to the train control device according to the present invention, with respect to the phase information of the amplitude modulated signal transmitted from the transmitting side, the receiving side can ensure the safety in discriminating the phase difference or the phase information. Can be provided.

It is a block diagram which shows the schematic structure of one Embodiment of the train control device which concerns on this invention. It is explanatory drawing which shows the phase change in the amplitude modulation wave. It is a flow chart which shows the processing method of the phase information adoption when there are three phase information. It is a block diagram which shows the flow of the generation of the train control signal transmitted from the ground device to the on-board device in a train control device. It is explanatory drawing which shows the example of the waveform which added the phase information to the carrier wave in the ground apparatus.

(Structure of train control device)
Hereinafter, the train control device 1 according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic configuration of one embodiment of the train control device 1 in a block diagram. As shown in FIG. 4, the train control device 1 is composed of a ground device 20 provided on the ground side and an on-board device 30 provided on the vehicle upper side of the train 21. The train control device 1 according to the present invention is an invention relating to the on-board device 30 among them.

(Ground device)
First, the ground device 20 will be described with reference to the block diagram of FIG. 4 and the explanatory diagram of FIG. FIG. 4 is a block diagram showing a flow of generating a train control signal transmitted from the ground device 20 to the on-board device 30 in the train control device 1. FIG. 5 shows an example of a waveform in which phase information is added to the _{carrier wave (f 0} ) in the ground device 20.

As shown in FIG. 4, the ground device 20 transmits an ATC signal such as speed control information of the train 21 to the on-board device 30. Then, the on-board device 30 that receives the ATC signal controls the train speed by the speed control information included in the signal. In the present invention, the case where the on-board device 30 receives the information regarding the signal display which is the speed control information from the ground device 20 will be described. In the present invention, the "train" means a vehicle such as a train or a diesel railcar. Further, the "train" includes a vehicle traveling on a rail with iron wheels and a vehicle traveling on a track using rubber tires.

The ground device 20 has a carrier wave generation circuit 23 that generates a carrier _{wave (f 0} ) having a predetermined frequency shown in FIG. 5 (a). _{The carrier wave (f 0} ) generated by the carrier wave generation circuit 23 is input to the modulation circuit 25 via the phase shift circuit 24 described later. Then, in the modulation circuit 25, the amplitude of this carrier wave (f _{0 ) is modulated by the modulation waves (f 1} , f ₂ ) selected from the main information selection circuit 26. The number of these modulated waves (f ₁ , f ₂ ) is not limited to two. These modulated waves (f ₁ , f ₂ ) are, for example, _{ATC signals that allow the modulated wave (f 1} ) to travel 45 km / h to the train 21, and the modulated wave (f ₂ ) is the train. It is assumed that it is an ATC signal that allows 21 to travel at 15 km / h. In this case, the modulated wave (f ₁ ) is a signal display corresponding to the above-mentioned “high-level display” with respect to the modulated wave (f _2). On the other hand, the modulated wave (f ₂ ) is a signal display corresponding to the above-mentioned “low-level display” with respect to the modulated wave (f _1).

Further, as shown in FIG. 5 (c), the carrier wave (f ₀ ) amplitude-modulated by these modulated waves (f ₁ , f ₂ ) corresponds to sub-information different from the main information by the phase shift circuit 24. Then, the phase (θ) of the carrier wave (f ₀ ) is phase-modulated to obtain a phase-modulated modulated wave (F ₁ , F ₂ ). That is, in the phase shift circuit 24, for example, the sub-information prepared in the sub-information (phase) selection circuit 27, which advances the phase (θ) of the _{carrier wave (f 0} ) by + π / 2 radians, the phase of the _{carrier wave (f 0).} Phase modulation processing is performed by selecting from sub-information in which (θ) is zero (0) radians, sub-information in which _{the phase (θ) of the carrier wave (f 0} ) is advanced by −π / 2 radians, and the like. The phase (θ) of the carrier (f ₀ ) is not limited to + π / 2 radians, 0 radians, and −π / 2 radians, and is arbitrary, for example, +180 degrees (+ π), −180 degrees (−π), and the like. The angle is fine. Further, the number of phases (θ) of the carrier wave (f ₀ ) is not limited to three, and may be any number. The phase-modulated modulated wave (F ₁ , F ₂ ) is composed of a mark portion 18 and a space portion 19 (see FIG. 5).

A specific example of the phase (θ) of these phase-modulated modulated waves (F ₁ , F ₂ ) is, for example, + π as the phase (θ) when the track circuit of the train 21 is a signal display. When the / 2 radians are selected and the orbital circuit is a caution indication, the phase (θ) is zero (0). When the radians are selected and the orbital circuit is a stop indication, the phase (θ) is −π /. 2 radians may be selected.

FIG. 2 shows the change in phase (θ) in the amplitude-modulated wave. The horizontal axis is the time axis, and the vertical axis is the amplitude. The phase (θ) of the reference mark (M0) of the phase (θ) of the carrier wave (f ₀ ) is set to zero (0) radians, and three consecutive marks (M1, M2, M3) are shown. The phase difference of the first mark M1 with respect to the reference mark (M0) is + θ ₁ . Further, the phase difference of the phase (θ) of the second mark M2 with respect to the reference mark (M0) is + 2θ ₁ . Further, the phase difference of the third mark M3 with respect to the reference mark (M0) is + 3θ ₁ . In this way, the phase (θ) of the carrier wave between the adjacent marks is set so as to have the same phase difference (Δθ) in each case. That is, train control information is added by the phase difference (Δθ) of the carrier wave (f _0).

_{The modulated waves (F 1} , F ₂ ), which are output signals that have been phase-modulated by the phase shift circuit 24 and amplitude-modulated by the modulation circuit 25, are amplified by the power amplifier 28 to form a track circuit on the rail 22. Be supplied. Then, as shown in FIG. 1, the on-board device 30 receives the signal transmitted from the ground side via the power receiver 13 provided in the train 21, and the amplifier circuit 14 performs the amplification process.

(On-board device)
As shown in FIG. 1, the on-board device 30 includes a signal processing unit 2 and a signal determining unit 3. The signal processing unit 2 includes a modulated wave detection circuit 6 that processes the main information and a phase difference detection circuit 7 that processes the sub information. The modulated wave detection circuit 6 extracts only information related _{to the modulated wave (F 1} , F _{2) from the transmitted output signal.} Then, the modulated waves (F ₁ , F ₂ ) are recognized respectively. On the other hand, the phase difference detection circuit 7 extracts only the information regarding the phase angle (θ) from the signal that receives the output signal transmitted from the ground device.

The main information and the sub-information processed by the filter circuit 5 of the signal processing unit 2 are transmitted to the signal determination unit 3, respectively. Then, the main information is transmitted to the modulated wave determination circuit 8, discriminates the received amplitude modulated wave, and determines the modulated wave (f ₁ , f ₂ ). On the other hand, the sub-information is transmitted to the phase difference determination circuit 9, and the received phase difference (Δθ ₁ , Δθ ₂ , Δθ ₃ ) is discriminated according to the determination condition stored in the usage condition storage unit 11, and the phase difference (Δθ) is determined. To confirm. Then, the main information and the sub-information determined by the modulated wave determination circuit 8 and the phase difference determination circuit 9 are merged with the signal information determination circuit 10 and determined as signal information transmitted from the ground device 20. The determined signal information is output from the display information output unit 12.

This train control device 1 can control trains such as speed limits based on the main information, and also has sub-information based on the phase angle (θ) of _{the carrier wave (f 0).} Can perform various train control. However, in order to perform train control based on the phase difference, which is secondary information, it is necessary to improve the safety when determining the phase angle (θ). The present invention proposes a coping method for this safety, and the contents thereof will be described below.

(Usage conditions for phase difference)
As described above, the phase difference (Δθ) detected by the phase difference detection circuit 7 may be affected by noise or the like. Therefore, the phase difference determination circuit 9 _{determines whether or not the phase difference (Δθ) detected from the adjacent waveform of the carrier wave (f 0} ) can be used according to the usage conditions (1) to (4) shown below. To do. In addition, these use conditions (1) to (4) may be used in combination. In this way, if a plurality of usage conditions are used in combination, it is possible to give higher safety to the discrimination result of the phase difference (Δθ).

(Phase information processing flow)
FIG. 3 shows a flow chart of S1 to S14 showing a processing method of adopting the phase information in the case where the phase information is three. In this flow chart, a case where the phase information has _{three phase differences of the lowest phase difference Δθ 1} , the intermediate value phase difference Δθ ₂ and the highest phase difference Δθ 3 will be described.

First, in the phase difference determination circuit 9, when the phase difference (Δθ) of the adjacent waveforms of the _{modulated waves (F 1} , F ₂ ) is within a preset allowable value as the usage condition (1), the phase difference determination circuit 9 is used. It is determined that the phase difference (Δθ) can be adopted. That is, first, the phase difference detection circuit 7 of the signal processing unit 2 detects the phase difference (Δθ) from the received signal (S1). Then, it is determined whether or not the phase difference (Δθ) detected by the phase difference determination circuit 9 is within the predetermined range (S2). If it is within the predetermined range (Yes), then it is determined whether the detected phase difference (Δθ) is the lower phase difference (Δθ ₁ ) (S3). If it is low (Yes), it is determined whether or not it has been repeated a predetermined number of times (S4). Then, the phase information is _{adopted as a low-order phase difference (Δθ 1} ) when the predetermined number of times (L times) is repeated (in the case of Yes) (S5).

The phase difference determination circuit 9 determines the phase information in the case where the phase information corresponding to the low-order display is detected from the _{carrier wave (f 0} ) as the usage condition (2) and the case where the phase information corresponding to the high-level display is detected. Different usage conditions. That is, in the above-mentioned determination of the phase difference, if it is not low (No in S3), it is determined whether or not _{the phase difference is an intermediate value (Δθ 2) (S6).} If it is an intermediate value (in the case of Yes), the phase information determines whether or not the predetermined number of times (M times) has been repeated (S7), and if it is repeated (in the case of Yes), the phase information is determined. If it is adopted as an intermediate phase difference (Δθ ₂ ) (S8) and the predetermined number of times (M times) is not repeated in step 7 (if No), the process returns to step 1 and the next phase difference from the received signal is obtained. Is detected.

In the determination of the phase difference in step 6 described above, if it is not a low or intermediate value, it can be determined that _{it is a high phase difference (Δθ 3) (S9).} In that case, it is determined whether or not the predetermined number of times (N times) of the phase information is repeated (S10), and if it is repeated (in the case of Yes), it is regarded as a high phase difference (Δθ ₃ ). If it is adopted (S11) and the specified number of times (N times) is not repeated (No), the process returns to step 1 and the next phase difference is detected from the received signal.

Here, it is assumed that the predetermined number of times has a magnitude relationship that the low duration number L is less than the median duration M and the median duration M is less than the high duration N. In this way, when the phase information corresponding to the low-level display is detected as the usage condition (3), the phase difference of the adjacent waveforms of the carrier waves has a predetermined duration (L times) within a predetermined range. If it exceeds, the phase information is adopted. Then, when the phase information corresponding to the high-order display is detected, it is adopted as the phase information when the number of times (N times) is larger than the low-order duration (L times) and is within the predetermined range.

If the detected phase difference (Δθ) is out of the predetermined range (No) in step 2, it is determined whether or not the detected phase difference (Δθ) has been repeated a predetermined number of times (P times) (S12). When the predetermined number of times (P times) is repeated (in the case of Yes), there is no phase difference information (S13). If the predetermined number of times (P times) is not repeated (No), the process returns to step 1 and the next phase difference is detected from the received signal. If there is no phase information (S13), the count of the predetermined number of times (P times) is cleared, the process returns to step 1 (S14), and the reception process is continued. In this way, when the phase difference (Δθ) exceeding the predetermined range is detected exceeding the predetermined number of times (P times), the phase difference (Δθ) is adopted as if there is no original phase information. Not done.

As described above, as the usage condition (4), when _{the phase information of the phase-modulated carrier wave (F 0} ) cannot be determined, it is assumed that the received signal has no phase information. That is, when the phase (θ) cannot be determined, it is regarded as “no sub-signal” and is displayed at the lowest level corresponding to the _{phase-modulated carrier waves (F 1} , F _{2) which is the main information.}

When determining the next phase difference (in the case of Yes), the count (L, M, N) of the number of times is cleared, the process returns to step 1 (S15), and the reception process is continued.

The configuration, shape, size, and arrangement relationship described in the above embodiments are only schematically shown to the extent that the present invention can be understood and implemented. Therefore, the present invention is not limited to the described embodiments, and can be changed to various forms as long as it does not deviate from the scope of the technical idea shown in the claims.

1 Train controller, 2 Signal processing unit, 3 Signal determination unit, 5 Filter circuit, 6 Modulated wave detection circuit, 7 Phase difference detection circuit, 8 Modulated wave determination circuit, 9 Phase difference determination circuit, 10 Signal information determination circuit, 11 Operating conditions Storage unit, 12 Display information output unit, 13 Power receiver, 14 Amplification circuit, 18 Mark unit, 19 Space unit, 20 Ground equipment, 21 trains, 22 rails, 23 carrier wave generation circuit, 24 phase shift circuit, 25 modulation circuit, 26 main information selecting circuit, 27 sub-information (phase) selection circuit, 28 a power amplifier, 30 on-board equipment, M0 reference mark, M1, M2, M3 a first carrier, second, third mark, _{f 0} the carrier , F ₁ , f ₂ modulated wave, F ₁ , F ₂ (phase-modulated) carrier wave, θ, θ ₁ , θ ₂ , θ ₃ phase or phase angle, Δθ, Δθ ₁ , Δθ ₂ , Δθ ₃ phase difference ..

Claims (2)

A train control apparatus for identifying by Ri the modulated treated carrier phase information,
As for the value of the phase information, whether it is a high-level display or a low-level display is assigned according to the height of the phase angle, and when the low-level display is detected, the phase difference between adjacent waveforms of the carrier wave is within a preset allowable value. When the predetermined number of times is exceeded, the phase information is adopted, and when the high-level indication is detected, the phase information is adopted when the number of times exceeds the number of times and is within the preset allowable value. to, the train control device. The train control device according to claim 1, wherein if the phase difference of the carrier wave or the phase information cannot be determined, the phase information is not provided.

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