JP2015037330A - Train control apparatus - Google Patents

Train control apparatus Download PDF

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JP2015037330A
JP2015037330A JP2013167161A JP2013167161A JP2015037330A JP 2015037330 A JP2015037330 A JP 2015037330A JP 2013167161 A JP2013167161 A JP 2013167161A JP 2013167161 A JP2013167161 A JP 2013167161A JP 2015037330 A JP2015037330 A JP 2015037330A
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signal
amplitude
train control
signal portion
maximum value
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JP6244136B2 (en
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顕夫 岩上
Akio Iwagami
顕夫 岩上
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Nippon Signal Co Ltd
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Nippon Signal Co Ltd
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Priority to KR1020167005964A priority patent/KR102088471B1/en
Priority to PCT/JP2014/071099 priority patent/WO2015020213A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning, or like safety means along the route or between vehicles or vehicle trains
    • B61L23/08—Control, warning, or like safety means along the route or between vehicles or vehicle trains for controlling traffic in one direction only
    • B61L23/14—Control, warning, or like safety means along the route or between vehicles or vehicle trains for controlling traffic in one direction only automatically operated
    • B61L23/16—Track circuits specially adapted for section blocking
    • B61L23/168—Track circuits specially adapted for section blocking using coded current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal
    • B61L3/16—Continuous control along the route
    • B61L3/22—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation
    • B61L3/221—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation using track circuits

Abstract

PROBLEM TO BE SOLVED: To provide a train control apparatus capable of discerning between a signal portion and a non-signal portion of a train control signal correctly, and demodulating a phase difference of a signal correctly.SOLUTION: A train control apparatus includes an on-vehicle device 3 to control a train 2 by receiving a train control signal transmitted from a ground apparatus 1, so that the on-vehicle device 3 calculates an average value of maximum values of amplitude-modulation waves constituting a received train control signal and determines a signal portion and a non-signal portion of the amplitude-modulation waves using the average value as a threshold.

Description

本発明は列車制御装置に係り、特に、列車制御信号の信号部と無信号部とを正しく判別することができ、信号の位相差を正しく復調することを可能とした列車制御装置に関する。   The present invention relates to a train control device, and more particularly to a train control device that can correctly discriminate between a signal portion and a no-signal portion of a train control signal and correctly demodulate a signal phase difference.

従来から、ＡＴＣに係る列車制御装置において、地上側に設けられる地上装置と、列車側に搭載される車上装置とから構成され、地上装置から列車に向けて所定の列車制御信号を送信し、送信された列車制御信号を車上装置で受信して速度制御等の所定の列車制御を行うように構成されている。   Conventionally, in a train control device according to ATC, it is composed of a ground device provided on the ground side and an on-board device mounted on the train side, and transmits a predetermined train control signal from the ground device to the train, The transmitted train control signal is received by the on-board device, and predetermined train control such as speed control is performed.

そして、近年、アナログＡＴＣ信号（振幅変調波）に位相変調を加え、従来のＡＴＣ信号と互換性を保ちながら情報量を増やすようにしたｅ−ＡＴＣと呼ばれるＡＴＣシステムが開発されている。そして、このｅ-ＡＴＣにおいては、振幅変調波の各信号部間の位相差が情報として送られるものであるため、ＡＴＣ受信部において信号の位相差を復調する際に、信号部と無信号部とを正しく判別する必要がある。   In recent years, an ATC system called e-ATC has been developed in which phase modulation is applied to an analog ATC signal (amplitude modulated wave) to increase the amount of information while maintaining compatibility with a conventional ATC signal. In this e-ATC, the phase difference between the signal parts of the amplitude-modulated wave is transmitted as information. Therefore, when demodulating the phase difference of the signal in the ATC receiver, the signal part and the non-signal part It is necessary to determine correctly.

このような信号部と無信号部とを正しく判別する技術として、従来、例えば、無線周波信号のしきい値とピーク値との間の振幅変化部分を抽出する振幅抽出手段と、無線周波信号の振幅変化部分と振幅飽和部分とだけを含んだ信号部分を抜出す信号抜出手段と、を備えた技術が開示されている（例えば、特許文献１を参照。）。   As a technique for correctly discriminating between such a signal portion and no signal portion, conventionally, for example, an amplitude extraction means for extracting an amplitude change portion between a threshold value and a peak value of a radio frequency signal, and a radio frequency signal A technique is disclosed that includes signal extraction means for extracting a signal portion including only an amplitude change portion and an amplitude saturation portion (see, for example, Patent Document 1).

特開２０１１−０８５５９６号公報JP 2011-085596 A

しかしながら、前記従来の技術においては、しきい値とピーク値との間の振幅変化部分を抽出することにより、信号部分を抜き出すようにしているが、信号にしきい値を超えるノイズが加わった場合、ノイズ部分を信号部として認識してしまい信号部と無信号部とを正しく判別することができないという問題を有している。また、信号が急激に小さくなりしきい値より小さい信号となった場合、信号部を無信号部として認識してしまい信号部と無信号部とを正しく判別することができないという問題を有している。その結果、信号の位相差を正しく復調することができず、誤った処理が行われてしまうおそれがあるという問題を有している。   However, in the conventional technique, the signal portion is extracted by extracting the amplitude change portion between the threshold value and the peak value, but when noise exceeding the threshold value is added to the signal, There is a problem that the noise portion is recognized as the signal portion and the signal portion and the non-signal portion cannot be correctly determined. Also, if the signal suddenly decreases and becomes a signal smaller than the threshold value, the signal part is recognized as a no-signal part, and the signal part and the no-signal part cannot be correctly distinguished. Yes. As a result, there is a problem that the phase difference of the signal cannot be correctly demodulated and erroneous processing may be performed.

本発明は前記した点に鑑みてなされたものであり、列車制御信号の信号部と無信号部とを正しく判別することができ、信号の位相差を正しく復調することのできる列車制御装置を提供することを目的とするものである。   The present invention has been made in view of the above points, and provides a train control device that can correctly discriminate between a signal portion and a no-signal portion of a train control signal and can correctly demodulate a signal phase difference. It is intended to do.

本発明は前記目的を達成するために、請求項１の発明に係る列車制御装置は、地上装置から送信された列車制御信号を受信して列車の制御を行う車上装置を備え、
前記車上装置は、受信した列車制御信号を構成する振幅変調波の極大値の平均値を求め、この平均値をしきい値として前記振幅変調波の信号部と無信号部とを判定することを特徴とする。 In order to achieve the above object, the train control device according to the invention of claim 1 includes an on-board device that receives a train control signal transmitted from a ground device and controls the train,
The on-board device obtains an average value of the maximum value of the amplitude modulation wave constituting the received train control signal, and determines the signal portion and the no-signal portion of the amplitude modulation wave using the average value as a threshold value. It is characterized by.

請求項２に係る発明は、請求項１において、前記車上装置は、少なくとも前記振幅変調波の１周期分の極大値に基づいて平均値を求めるものであることを特徴とする。   The invention according to claim 2 is characterized in that, in claim 1, the on-board device obtains an average value based on a maximum value for at least one period of the amplitude-modulated wave.

請求項３に係る発明は、請求項１または請求項２において、前記車上装置は、前記振幅変調波の平均値を求めるための極大値を記憶しておき、新たな極大値を検出した場合に、最も古い極大値を消去するものであることを特徴とする。   According to a third aspect of the present invention, in the first or second aspect, the on-board device stores a local maximum value for obtaining an average value of the amplitude-modulated wave and detects a new local maximum value. Further, the oldest local maximum value is erased.

請求項４に係る発明は、請求項１から請求項３のいずれか一項において、前記車上装置は、前記振幅変調波の信号部の時間差を求め、この信号部の時間差が前の信号部の時間差と異なる場合に、当該信号部の位相変化量を採用しないように処理することを特徴とする。   According to a fourth aspect of the present invention, in the vehicle-mounted device according to any one of the first to third aspects, the time difference of the signal part of the amplitude-modulated wave is obtained, and the time difference of the signal part is the previous signal part. When the time difference is different from the above, the processing is performed so as not to adopt the phase change amount of the signal portion.

請求項５に係る発明は、請求項１から請求項３のいずれか一項において、前記車上装置は、前記振幅変調波の信号部に基づいて位相変化量を求め、この位相変化量が前に求めた位相変化量と異なる場合に、当該位相変化量を採用しないように処理することを特徴とする。   According to a fifth aspect of the present invention, in the vehicle-mounted device according to any one of the first to third aspects, the on-board device obtains a phase change amount based on a signal portion of the amplitude-modulated wave, and the phase change amount is If the phase change amount is different from that obtained in step (b), processing is performed such that the phase change amount is not adopted.

請求項１に係る発明によれば、車上装置により、受信した列車制御信号を構成する振幅変調波の極大値の平均値を求め、この平均値をしきい値として振幅変調波の信号部と無信号部とを判定するようにしているので、信号部と無信号部とを正確に判定することができ、振幅変調波の位相差に基づいて正確な列車制御情報を得ることができる。   According to the first aspect of the invention, the average value of the maximum value of the amplitude-modulated wave constituting the received train control signal is obtained by the on-board device, and the signal unit of the amplitude-modulated wave is obtained using this average value as a threshold value. Since the no-signal portion is determined, the signal portion and the no-signal portion can be accurately determined, and accurate train control information can be obtained based on the phase difference of the amplitude-modulated wave.

請求項２に係る発明によれば、車上装置により、少なくとも振幅変調波の１周期分の極大値に基づいて平均値を求めるようにしているので、振幅変調波の１周期分の極大値に基づいた平均値をしきい値として振幅変調波の信号部と無信号部とを判定することができる。   According to the second aspect of the invention, since the average value is obtained based on at least the maximum value for one period of the amplitude-modulated wave by the on-board device, the maximum value for one period of the amplitude-modulated wave is obtained. The signal portion and the no-signal portion of the amplitude-modulated wave can be determined using the based average value as a threshold value.

請求項３に係る発明によれば、車上装置が、振幅変調波の平均値を求めるための極大値を記憶しておき、新たな極大値を検出した場合に、最も古い極大値を消去するようにしているので、車上装置の記憶容量が少なくて済み、設備コストを低減させることができる。   According to the third aspect of the present invention, the on-board device stores the maximum value for obtaining the average value of the amplitude-modulated wave, and erases the oldest maximum value when a new maximum value is detected. As a result, the storage capacity of the on-board device is small, and the equipment cost can be reduced.

請求項４に係る発明によれば、車上装置により、振幅変調波の信号部の時間差を求め、この信号部の時間差が前の信号部の時間差と異なる場合に、当該信号部の位相変化量を採用しないように処理するようにしているので、信号部を無信号部として判定してしまった場合でも、振幅変調波の位相差を正確に判定することができる。   According to the invention according to claim 4, when the time difference of the signal part of the amplitude-modulated wave is obtained by the on-board device, and the time difference of this signal part is different from the time difference of the previous signal part, the phase change amount of the signal part Therefore, even when the signal portion is determined as a non-signal portion, the phase difference of the amplitude-modulated wave can be accurately determined.

請求項５に係る発明によれば、車上装置により、振幅変調波の信号部に基づいて位相変化量を求め、この位相変化量が前に求めた位相変化量と異なる場合に、当該位相変化量を採用しないように処理するようにしているので、信号部を無信号部として判定してしまった場合でも、振幅変調波の位相差を正確に判定することができる。   According to the fifth aspect of the present invention, when the on-board device obtains the phase change amount based on the signal portion of the amplitude-modulated wave, and the phase change amount is different from the previously obtained phase change amount, the phase change amount is determined. Since the processing is performed so that the amount is not adopted, even when the signal portion is determined as a non-signal portion, the phase difference of the amplitude-modulated wave can be accurately determined.

本発明に係る列車制御装置の実施形態を示す概略構成図である。It is a schematic structure figure showing an embodiment of a train control device concerning the present invention. 本発明に係る列車制御装置の実施形態における車上装置の信号・無信号判定部を示す概略構成図である。It is a schematic block diagram which shows the signal and no signal determination part of the on-board apparatus in embodiment of the train control apparatus which concerns on this invention. 本発明に係る列車制御装置の実施形態における振幅変調波の例を示す説明図である。It is explanatory drawing which shows the example of the amplitude modulation wave in embodiment of the train control apparatus which concerns on this invention. 本発明に係る列車制御装置の実施形態における振幅変調波の時間差を求める場合の例を示す説明図である。It is explanatory drawing which shows the example in the case of calculating | requiring the time difference of an amplitude modulation wave in embodiment of the train control apparatus which concerns on this invention.

以下、本発明の実施形態について図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、本発明に係る列車制御装置の実施形態を示す概略構成図であり、図１において、本実施形態の列車制御装置は、地上側に設けられている地上装置１と、列車２に搭載した車上装置３と、を備えて構成されている。そして、地上装置１から、例えば、列車２の許容速度情報などの列車制御情報に対応させた列車制御信号を、図中右方向に進行している列車２が在線する軌道回路Ｔのレールの図中右端側から送信し、この列車制御信号を車上装置３が受信すると、列車制御信号から列車制御情報を抽出し、抽出した列車制御情報に基づいて列車２の走行を制御するよう構成されている。軌道回路は、レールにより形成されていて、前後の軌道回路Ｔ′，Ｔ″を形成するレールとは、交流信号に対してそれぞれ電気的絶縁が図られている。   FIG. 1 is a schematic configuration diagram illustrating an embodiment of a train control device according to the present invention. In FIG. 1, the train control device of the present embodiment includes a ground device 1 provided on the ground side and a train 2. And an on-vehicle device 3 mounted thereon. And the figure of the rail of the track circuit T in which the train 2 traveling in the right direction in the figure shows a train control signal corresponding to the train control information such as the allowable speed information of the train 2 from the ground device 1. When the on-board device 3 receives the train control signal transmitted from the middle right end side, the train control information is extracted from the train control signal, and the traveling of the train 2 is controlled based on the extracted train control information. Yes. The track circuit is formed by rails, and is electrically insulated from the rails forming the front and rear track circuits T ′ and T ″ with respect to the AC signal.

また、地上装置１は、所定の周波数を有する基本搬送波を振幅変調処理して変調波を生成し、所定の列車制御情報を示す列車制御信号を形成するように構成されている。そして、このように、振幅変調処理された列車制御信号は、増幅処理されて軌道回路Ｔを形成するレールに供給されるように構成されている。なお、このような地上装置１は、隣接する軌道回路Ｔ′，Ｔ″にもそれぞれ設けられているが、ここでは省略する。   The ground device 1 is configured to generate a modulated wave by performing amplitude modulation processing on a basic carrier wave having a predetermined frequency to form a train control signal indicating predetermined train control information. Thus, the train control signal subjected to the amplitude modulation processing is configured to be amplified and supplied to the rails forming the track circuit T. Such a ground device 1 is also provided in each adjacent track circuit T ′, T ″, but is omitted here.

次に、車上装置３について説明する。   Next, the on-board device 3 will be described.

車上装置３には、列車２の前部においてレールに対向して設けられ地上装置１からレールに送信された列車制御信号を受電器４により受信して送られるように構成されている。また、車上装置３は、受電器４からの信号を受信する受信部、論理部、モニタ部など（いずれも図示せず）、各種装置を備えており、受信部は、信号・無信号判定部を備えている。図２は、この信号・無信号判定部９の詳細を示したものであり、図２に示すように、信号・無信号判定部９は、極大値抽出部５と、平均値演算部６と、極大値記憶部７と、判定部８とを備えている。   The on-board device 3 is configured to be opposed to the rail at the front portion of the train 2 and to receive and transmit a train control signal transmitted from the ground device 1 to the rail by the power receiver 4. The on-board device 3 includes various devices such as a receiving unit that receives a signal from the power receiver 4, a logic unit, and a monitoring unit (none of which are shown). Department. FIG. 2 shows details of the signal / no signal determination unit 9. As shown in FIG. 2, the signal / no signal determination unit 9 includes a maximum value extraction unit 5, an average value calculation unit 6, and the like. The maximum value storage unit 7 and the determination unit 8 are provided.

ここで、列車制御信号は、図３に示すように、振幅に周期性を持たせた振幅変調波であり、信号部と無信号部とから構成されている。そして、振幅の信号部と、次の信号部との位相を、例えば、９０°ずつずらして送信することにより、この振幅の位相差を情報として送ることができるようになっている。   Here, as shown in FIG. 3, the train control signal is an amplitude-modulated wave having a periodicity in amplitude, and is composed of a signal portion and a non-signal portion. Then, the phase difference between the amplitude signal portion and the next signal portion is transmitted by shifting by 90 °, for example, so that the phase difference of the amplitude can be transmitted as information.

極大値抽出部５は、振幅変調波の極大値を抽出して極大値記憶部７に記憶させるように構成されている。また、平均値演算部６は、極大値記憶部７に記憶された複数の極大値の平均値を求めるように構成されている。   The maximum value extraction unit 5 is configured to extract the maximum value of the amplitude-modulated wave and store it in the maximum value storage unit 7. The average value calculation unit 6 is configured to obtain an average value of a plurality of maximum values stored in the maximum value storage unit 7.

この平均値を求める際の極大値としては、少なくとも、振幅変調波の１周期分、すなわち、信号部の開始部から次の無信号部の終了部までの極大値を用いることが好ましい。そして、極大値記憶部７は、振幅変調波の１周期分の極大値を記憶するように構成されており、新たに極大値が抽出された場合には、最も古い極大値を消去して、常に振幅変調波の１周期分の極大値が記憶されるようにしておく。このようにすることにより、極大値記憶部７の記憶容量が少なくて済み、設備コストを低減させることができる。   As the maximum value for obtaining the average value, it is preferable to use at least a maximum value for one period of the amplitude-modulated wave, that is, from the start part of the signal part to the end part of the next non-signal part. The maximum value storage unit 7 is configured to store a maximum value for one period of the amplitude-modulated wave. When a maximum value is newly extracted, the oldest maximum value is deleted, The maximum value for one period of the amplitude-modulated wave is always stored. By doing so, the storage capacity of the maximum value storage unit 7 can be reduced, and the equipment cost can be reduced.

なお、平均値を求める際の極大値としては、振幅変調波の１周期分に限定されるものではなく、必要に応じて、１周期より少ない極大値を用いるようにしてもよいし、１周期より多い極大値を用いるようにしてもよい。   The maximum value for obtaining the average value is not limited to one period of the amplitude-modulated wave, and if necessary, a maximum value less than one period may be used. More maximum values may be used.

判定部８は、平均値演算部６により求められた平均値をしきい値と設定し、振幅変調波の振幅がしきい値より高い場合は、信号部であると判定し、しきい値より低い場合は、無信号部であると判定するように構成されている。   The determination unit 8 sets the average value obtained by the average value calculation unit 6 as a threshold value. If the amplitude of the amplitude-modulated wave is higher than the threshold value, the determination unit 8 determines that it is a signal unit, When it is low, it is determined to be a no-signal portion.

次に、本実施形態の動作について説明する。   Next, the operation of this embodiment will be described.

地上装置１からレールに送信された列車制御信号を受電器４により受信したら、車上装置３の極大値抽出部５により、振幅変調波の極大値を抽出して極大値記憶部７に記憶させ、平均値演算部６により、極大値記憶部７に記憶された複数の極大値の平均値を求める。そして、極大値記憶部７は、極大値抽出部５により新たに極大値が抽出された場合には、最も古い極大値を消去して、常に振幅変調波の１周期分の極大値が記憶されるようにしておく。   When the train control signal transmitted from the ground device 1 to the rail is received by the power receiver 4, the maximum value extraction unit 5 of the on-board device 3 extracts the maximum value of the amplitude-modulated wave and stores it in the maximum value storage unit 7. The average value calculation unit 6 obtains an average value of a plurality of maximum values stored in the maximum value storage unit 7. When the local maximum value is newly extracted by the local maximum value extracting unit 5, the local maximum value storage unit 7 erases the oldest local maximum value and always stores the local maximum value for one period of the amplitude-modulated wave. Make sure that

そして、判定部８により、平均値演算部６により求められた平均値をしきい値と設定し、振幅変調波の振幅がしきい値より高い場合は、信号部であると判定し、しきい値より低い場合は、無信号部であると判定する。このように振幅変調波の信号部と無信号部とを判定することにより、振幅変調波の位相を検出し、この位相差に基づいて列車制御情報を得るようになっている。   Then, the determination unit 8 sets the average value obtained by the average value calculation unit 6 as a threshold value. When it is lower than the value, it is determined that the signal-free portion. Thus, by determining the signal portion and the non-signal portion of the amplitude modulated wave, the phase of the amplitude modulated wave is detected, and train control information is obtained based on this phase difference.

ここで、振幅変調波の信号部の振幅が急激に小さくなってしまうことがあるが、このような場合に、前述のように極大値の平均値をしきい値として信号部、無信号部を判定するようにしても、信号部を無信号部として判定してしまうおそれがある。   Here, the amplitude of the signal portion of the amplitude-modulated wave may suddenly decrease. In such a case, as described above, the signal portion and the non-signal portion are set with the average value of the local maximum as a threshold value. Even if it determines, there exists a possibility that a signal part may be determined as a no-signal part.

そのため、本実施形態においては、振幅変調波の信号部の位相を求める際に、同時に信号部の時間差を求めるようにすればよい。すなわち、図４に示すように、振幅変調波の信号部が時間差がｔ１で送られてきている状態で、仮に１つの信号部を無信号部と判定してしまった場合に、次の信号部との時間差がｔ２となるため、判定部８は、この時間差ｔ１と、時間差ｔ２が異なる場合に、時間差がｔ２となった信号部の位相変化量を採用しないように処理するようにすればよい。このように振幅変調波の信号部の時間差を求めて、振幅変調波の信号部の時間差が前の信号部の時間差と異なる場合、求めた位相を採用せず、１つ前の信号部の位相を採用することにより、振幅変調波の信号部の振幅が急激に小さくなった場合など、信号部を無信号部として判定してしまった場合でも、振幅変調波の位相差を正確に判定することができる。   Therefore, in this embodiment, when obtaining the phase of the signal portion of the amplitude-modulated wave, the time difference between the signal portions may be obtained at the same time. That is, as shown in FIG. 4, if one signal part is determined as a no-signal part in a state where the signal part of the amplitude-modulated wave is transmitted with a time difference t1, the next signal part Therefore, when the time difference t1 is different from the time difference t2, the determination unit 8 may perform processing so as not to adopt the phase change amount of the signal part at which the time difference is t2. . Thus, when the time difference of the signal part of the amplitude modulation wave is obtained and the time difference of the signal part of the amplitude modulation wave is different from the time difference of the previous signal part, the obtained phase is not adopted and the phase of the previous signal part is adopted. Even if the signal part is determined as a no-signal part, such as when the amplitude of the signal part of the amplitude-modulated wave suddenly decreases, the phase difference of the amplitude-modulated wave can be accurately determined. Can do.

なお、他の手段として、振幅変調波の信号部の位相を求める際に、信号部の位相差を求め、判定部８により、この位相差が、異なる場合に、異なった位相差を採用しないように、処理するようにしてもよい。この場合も、位相差が異なる場合、求めた位相を採用せず、１つ前の信号部の位相を採用することにより、振幅変調波の信号部の振幅が急激に小さくなった場合など、信号部を無信号部として判定してしまった場合でも、振幅変調波の位相差を正確に判定することができる。   As another means, when the phase of the signal portion of the amplitude-modulated wave is obtained, the phase difference of the signal portion is obtained, and when the phase difference is different by the determination unit 8, a different phase difference is not adopted. Alternatively, it may be processed. Also in this case, when the phase difference is different, the signal obtained when the amplitude of the signal part of the amplitude-modulated wave is suddenly reduced by adopting the phase of the previous signal part without adopting the obtained phase is used. Even when the part is determined as a no-signal part, the phase difference of the amplitude-modulated wave can be accurately determined.

以上述べたように、本実施形態においては、判定部８により、平均値演算部６により求められた平均値をしきい値と設定し、振幅変調波の振幅がしきい値より高い場合は、信号部であると判定し、しきい値より低い場合は、無信号部であると判定するようにしているので、信号部と無信号部とを正確に判定することができ、振幅変調波の位相差に基づいて正確な列車制御情報を得ることができる。   As described above, in the present embodiment, when the determination unit 8 sets the average value obtained by the average value calculation unit 6 as a threshold value and the amplitude of the amplitude-modulated wave is higher than the threshold value, If it is determined that the signal portion is lower than the threshold value, it is determined that the signal portion is a no-signal portion. Therefore, the signal portion and the no-signal portion can be accurately determined. Accurate train control information can be obtained based on the phase difference.

なお、本発明は前記実施形態に限定されるものではなく、本発明の趣旨に基づいて種々の変形が可能である。   In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible based on the meaning of this invention.

１ 地上装置
２ 列車
３ 車上装置
４ 受電器
５ 極大値抽出部
６ 平均値演算部
７ 極大値記憶部
８ 判定部
９ 信号・無信号判定部 DESCRIPTION OF SYMBOLS 1 Ground apparatus 2 Train 3 On-board apparatus 4 Power receiver 5 Maximum value extraction part 6 Average value calculation part 7 Maximum value memory | storage part 8 Judgment part 9 Signal / no signal determination part

Claims (5)

地上装置から送信された列車制御信号を受信して列車の制御を行う車上装置を備え、
前記車上装置は、受信した列車制御信号を構成する振幅変調波の極大値の平均値を求め、この平均値をしきい値として前記振幅変調波の信号部と無信号部とを判定することを特徴とする列車制御装置。 An on-board device that receives the train control signal transmitted from the ground device and controls the train,
The on-board device obtains an average value of the maximum value of the amplitude modulation wave constituting the received train control signal, and determines the signal portion and the no-signal portion of the amplitude modulation wave using the average value as a threshold value. A train control device characterized by. 前記車上装置は、少なくとも前記振幅変調波の１周期分の極大値に基づいて平均値を求めるものであることを特徴とする請求項１に記載の列車制御装置。   The train control device according to claim 1, wherein the on-board device obtains an average value based on at least a maximum value for one period of the amplitude-modulated wave. 前記車上装置は、前記振幅変調波の平均値を求めるための極大値を記憶しておき、新たな極大値を検出した場合に、最も古い極大値を消去するものであることを特徴とする請求項１または請求項２に記載の列車制御装置。   The on-board device stores a local maximum value for obtaining an average value of the amplitude-modulated wave, and erases the oldest local maximum value when a new local maximum value is detected. The train control device according to claim 1 or 2. 前記車上装置は、前記振幅変調波の信号部の時間差を求め、この信号部の時間差が前の信号部の時間差と異なる場合に、当該信号部の位相変化量を採用しないように処理することを特徴とする請求項１から請求項３のいずれか一項に記載の列車制御装置。   The on-board device obtains a time difference of the signal portion of the amplitude-modulated wave, and when the time difference of the signal portion is different from the time difference of the previous signal portion, performs processing so as not to employ the phase change amount of the signal portion. The train control device according to any one of claims 1 to 3, wherein 前記車上装置は、前記振幅変調波の信号部に基づいて位相変化量を求め、この位相変化量が前に求めた位相変化量と異なる場合に、当該位相変化量を採用しないように処理することを特徴とする請求項１から請求項３のいずれか一項に記載の列車制御装置。   The on-board device obtains a phase change amount based on the signal portion of the amplitude-modulated wave, and when the phase change amount is different from the previously obtained phase change amount, performs processing so as not to adopt the phase change amount. The train control device according to any one of claims 1 to 3, wherein
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