JP2019051756A - Train control system - Google Patents
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本発明は、列車検知信号により列車の在線／非在線と車上装置の種類を判別し、列車の制御を行う列車制御システムに関する。 The present invention relates to a train control system for controlling a train by discriminating between the presence / absence of a train and the type of on-board device based on a train detection signal.
新交通システムでは、ゴムタイヤによる走行をしているため、レールによる軌道回路のような車軸短絡方式による列車検知ができない。このため、一般的には車上装置からアンテナを介して地上のループコイルに列車検知信号（以下、ＴＤ信号と略称する）を送信し、このＴＤ信号の有無を地上装置で検知して、該当ループコイル（軌道）上における列車の在線／非在線を検出している（特許文献１参照）。 The new transportation system uses rubber tires, so it cannot detect trains using the axle short circuit method like a rail track circuit. For this reason, generally, a train detection signal (hereinafter abbreviated as TD signal) is transmitted from the on-board device to the ground loop coil via the antenna, and the presence or absence of this TD signal is detected by the ground device. The presence / absence of the train on the loop coil (track) is detected (see Patent Document 1).
ところで、地上装置を新たな信号システムに更新する場合、多数の車両に搭載されている機器も交換しなければならないため、過渡期においては新旧の車上装置が混在することがある。そこで、上記特許文献１では、車上装置から送信するＴＤ信号の搬送波の位相を車上装置の種類により変えることにより、既設の車上装置（旧信号対応車上装置）と新型の車上装置（新信号対応車上装置）を識別している。 By the way, when the ground device is updated to a new signal system, equipment mounted on a large number of vehicles must be replaced. Therefore, in the transition period, old and new on-board devices may be mixed. Therefore, in Patent Document 1, by changing the phase of the carrier wave of the TD signal transmitted from the on-board device depending on the type of the on-board device, the existing on-board device (old signal-compatible on-board device) and the new on-board device. (New signal compatible on-board equipment) is identified.
しかしながら、特許文献１に提案されている技術では、地上装置側で情報を受信する場合に、ＴＤ信号を受信して復調する回路の他に、搬送波の位相を検出する複雑な回路が必要となる。また、ＴＤ信号とこのＴＤ信号と同じ周波数帯域に入ってくる雑音とのレベル比（Ｓ／Ｎ比）を十分にとる必要があるため、車上装置から送信するＴＤ信号の出力を大きくしなければならない、という課題がある。 However, the technique proposed in Patent Document 1 requires a complicated circuit for detecting the phase of a carrier wave in addition to a circuit for receiving and demodulating a TD signal when receiving information on the ground device side. . In addition, since it is necessary to take a sufficient level ratio (S / N ratio) between the TD signal and noise entering the same frequency band as the TD signal, the output of the TD signal transmitted from the on-board device must be increased. There is a problem that must be done.
本発明は上記のような事情に鑑みてなされたもので、その目的とするところは、復調の方式が異なる複雑な回路を設けたり、列車検知信号の出力を大きくしたりすることなく、車上装置の種類を判別できる列車制御システムを提供することにある。 The present invention has been made in view of the circumstances as described above, and the object of the present invention is to provide an on-board vehicle without providing a complicated circuit having a different demodulation method or increasing the output of a train detection signal. The object is to provide a train control system capable of discriminating the type of apparatus.
本発明の一態様に係る列車制御システムは、地上に設置したループコイルに車上装置から変調された列車検知信号を送信し、該ループコイルを介して地上装置で受信した列車検知信号を復調して列車の在線／非在線を検出し、列車を制御するシステムであって、前記車上装置から送信される列車検知信号のマークスペース比を車上装置の種類に応じて変え、地上装置で受信した列車検知信号の高調波成分の相違に基づいて車上装置の種類を判別する、ことを特徴とする。 The train control system according to one aspect of the present invention transmits a train detection signal modulated from an on-board device to a loop coil installed on the ground, and demodulates the train detection signal received by the ground device via the loop coil. The system detects the presence / absence of a train and controls the train, and changes the mark space ratio of the train detection signal transmitted from the on-board device according to the type of on-board device and receives it on the ground device. The type of the on-board device is determined based on the difference in the harmonic components of the train detection signal.
本発明によれば、列車検知信号の高調波成分の相違に基づいて車上装置の種類を判別するので、復調の方式が異なる複雑な回路を設けたり、列車検知信号の出力を大きくしたりすることなく、車上装置の種類を判別できる。 According to the present invention, since the type of the on-board device is determined based on the difference in the harmonic component of the train detection signal, a complicated circuit having a different demodulation method is provided, or the output of the train detection signal is increased. The type of on-board device can be determined without any problem.
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。
図１は、本発明の実施形態に係る列車制御システムの構成例を示している。このシステムは、地上に設置したループコイルＬＣに車上装置１から変調されたＴＤ信号を送信し、該ループコイルＬＣを介して地上装置２で受信したＴＤ信号を復調して列車の在線／非在線を検出し、列車を制御するようになっており、いわゆるＡＴＣ／ＴＤ（自動列車制御／列車検知：Automatic Train Control / Train Detection）と呼ばれるものである。
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a configuration example of a train control system according to an embodiment of the present invention. This system transmits a TD signal modulated from the on-board device 1 to the loop coil LC installed on the ground, demodulates the TD signal received by the ground device 2 via the loop coil LC, and detects whether the train is on / off. A standing line is detected and the train is controlled, which is called ATC / TD (Automatic Train Control / Train Detection).
列車に搭載される車上装置１には、ＴＤ信号送信装置３とＡＴＣ信号受信装置４が設けられており、地上装置２にはＴＤ信号受信装置５とＡＴＣ信号送信装置６が設けられている。ＴＤ信号送信装置３は、ＴＤ信号を生成してアンテナ１７を介して地上のループコイルＬＣに送信するものであり、搬送波発生部７、変調部８、増幅器（ＡＭＰ）９、変調波設定部１０、及びＴＤ信号用フィルタ１６等を備えている。変調波設定部１０には、本例では新信号対応車上装置（または新設車両）用にマークスペース比（ＭＳ比）が「１：１」の変調波と、旧信号対応車上装置（または既設車両）用にＭＳ比が「３：１」の変調波とが設定されている。そして、搬送波発生部７で発生した搬送波を、変調波設定部１０に設定されている変調波により変調部８で振幅変調してＴＤ信号を生成し、増幅器９で増幅した後、ＴＤ信号用フィルタ（バンドパスフィルタ）１６を介して出力するようになっている。 The on-board device 1 mounted on the train is provided with a TD signal transmission device 3 and an ATC signal reception device 4, and the ground device 2 is provided with a TD signal reception device 5 and an ATC signal transmission device 6. . The TD signal transmission device 3 generates a TD signal and transmits it to the ground loop coil LC via the antenna 17. The carrier generation unit 7, the modulation unit 8, the amplifier (AMP) 9, and the modulation wave setting unit 10. And a TD signal filter 16 and the like. In this example, the modulation wave setting unit 10 includes a modulation wave having a mark space ratio (MS ratio) of “1: 1” for an on-board device (or a new vehicle) for a new signal and an on-board device for an old signal (or A modulation wave having an MS ratio of “3: 1” is set for an existing vehicle. Then, the carrier wave generated by the carrier wave generating unit 7 is amplitude-modulated by the modulation unit 8 using the modulation wave set in the modulation wave setting unit 10 to generate a TD signal, amplified by the amplifier 9, and then filtered for the TD signal. (Band pass filter) 16 is used for output.
ＴＤ信号受信装置５は、ループコイルＬＣから受信したＴＤ信号を復調するために変調波を検出する変調波検出部１１と、この変調波検出部１１により検出した変調波からＴＤ信号を識別し、列車の在線を示す列車検知出力、列車の非在線を示す列車非検知出力、及び既設の車上装置（旧信号対応車上装置）か新型の車上装置（新信号対応車上装置）かを示す新旧信号切替出力信号をそれぞれ出力するＴＤ信号識別部１２とを含んでいる。ＡＴＣ信号送信装置６は、ＴＤ信号受信装置５で受信した車上装置１の種類（新信号対応車上装置か、あるいは旧信号対応車上装置か）に対応する列車制御信号（ＡＴＣ信号）を、ループコイルＬＣを介して車上装置１に送信するものである。このＡＴＣ信号送信装置６は、新信号対応のＡＴＣ信号を出力する新ＡＴＣ信号送信機１３、旧信号対応のＡＴＣ信号を出力する旧ＡＴＣ信号送信機１４、及びこれら送信機１３，１４から出力されるＡＴＣ信号を、ＴＤ信号識別部１２から出力される新旧信号切替出力信号に基づいて切り替える新旧ＡＴＣ信号送信切替部１５を含んでいる。そして、新旧ＡＴＣ信号送信切替部１５で選択された、新ＡＴＣ信号送信機１３または旧ＡＴＣ信号送信機１４から出力されるＡＴＣ信号が、車上装置１のＡＴＣ信号用フィルタ（バンドパスフィルタ）１８を介してＡＴＣ信号受信装置４に供給されて列車が制御されるようになっている。 The TD signal receiving device 5 identifies a TD signal from the modulated wave detected by the modulated wave detector 11 and the modulated wave detected by the modulated wave detector 11 in order to demodulate the TD signal received from the loop coil LC. Train detection output indicating the presence of a train, train non-detection output indicating a non-train presence, and whether an existing on-board device (old signal-compatible on-board device) or a new on-board device (new signal-compatible on-board device) And a TD signal identifying unit 12 for outputting the old and new signal switching output signals shown. The ATC signal transmission device 6 receives a train control signal (ATC signal) corresponding to the type of the on-board device 1 received by the TD signal receiving device 5 (whether the on-board device is compatible with a new signal or the on-board device corresponding to an old signal). The signal is transmitted to the on-vehicle device 1 via the loop coil LC. The ATC signal transmitter 6 is output from a new ATC signal transmitter 13 that outputs an ATC signal corresponding to a new signal, an old ATC signal transmitter 14 that outputs an ATC signal corresponding to an old signal, and the transmitters 13 and 14. A new / old ATC signal transmission switching unit 15 for switching the ATC signal based on the new / old signal switching output signal output from the TD signal identification unit 12 is included. The ATC signal output from the new ATC signal transmitter 13 or the old ATC signal transmitter 14 selected by the new / old ATC signal transmission switching unit 15 is converted into an ATC signal filter (bandpass filter) 18 of the on-board device 1. The train is controlled by being supplied to the ATC signal receiving device 4 via.
図２は、図１におけるＴＤ信号受信装置５の構成例を示す機能ブロック図である。変調波検出部１１は、振幅変調波から変調波成分を抽出するものであり、検波器２０と、ＴＤ信号（本例では振幅変調波であり、ここではＴＤ変調波と称する）の１次成分を通過する列車検知用フィルタ２５と、ＴＤ変調波の２次成分を通過する種類判別用フィルタ２６とを備えている。また、ＴＤ信号識別部１２は変調波識別部２２とＴＤ信号検出部２３とを備えており、変調波識別部２２は、列車検知用レベル検出器２７と種類判別用レベル検出器２８とを含んでいる。そして、列車検知用フィルタ２５を通過したＴＤ変調波における１次成分のレベルが列車検知用レベル検出器２７で検出される。また、種類判別用フィルタ２６を通過したＴＤ変調波における２次成分のレベルが種類判別用レベル検出器２８で検出される。 FIG. 2 is a functional block diagram showing a configuration example of the TD signal receiving device 5 in FIG. The modulated wave detection unit 11 extracts a modulated wave component from the amplitude modulated wave, and the primary component of the detector 20 and the TD signal (in this example, the amplitude modulated wave, here referred to as a TD modulated wave). Train detection filter 25 and type discrimination filter 26 that passes the secondary component of the TD modulated wave. The TD signal identification unit 12 includes a modulation wave identification unit 22 and a TD signal detection unit 23, and the modulation wave identification unit 22 includes a train detection level detector 27 and a type determination level detector 28. It is out. The level of the primary component in the TD modulated wave that has passed through the train detection filter 25 is detected by the train detection level detector 27. Further, the level of the secondary component in the TD modulated wave that has passed through the type discrimination filter 26 is detected by the type discrimination level detector 28.
ＴＤ信号検出部２３は、列車検知用信号閾値判別部２９と種類判別用信号閾値判別部３０とを備えている。列車検知用信号閾値判別部２９でＴＤ変調波の１次成分が列車検知用閾値以上であると判定されると、列車検知出力が地上装置２に入力されて列車の在線が認識され、列車検知用閾値未満であると判定されると、新旧ＡＴＣ信号送信切替部１５へ列車の非在線を示す列車非検知出力が供給される。この新旧ＡＴＣ信号送信切替部１５へ送る信号は、列車非在線時にどのような信号を送るか予め決めておき、その信号を送信するようにすると良い。また、種類判別用信号閾値判別部３０でＴＤ変調波の２次成分が種類判別用閾値以上であると判定されると、新旧信号切替出力信号として新型判定出力が新旧ＡＴＣ信号送信切替部１５へ供給され、種類判別用閾値未満であると判定されると、新旧信号切替出力信号として旧型判定出力が新旧ＡＴＣ信号送信切替部１５へ供給される。 The TD signal detection unit 23 includes a train detection signal threshold determination unit 29 and a type determination signal threshold determination unit 30. When the train detection signal threshold discriminating unit 29 determines that the primary component of the TD modulated wave is equal to or greater than the train detection threshold, the train detection output is input to the ground device 2 to recognize the presence of the train and train detection. If it is determined that it is less than the threshold value for train use, a train non-detection output indicating a non-existing train line is supplied to the old and new ATC signal transmission switching unit 15. The signal to be sent to the old and new ATC signal transmission switching unit 15 may be determined in advance as to what kind of signal is to be sent when the train is not present, and the signal may be transmitted. When the type discrimination signal threshold discrimination unit 30 determines that the secondary component of the TD modulated wave is greater than or equal to the type discrimination threshold, the new type determination output is sent to the old and new ATC signal transmission switching unit 15 as the old and new signal switching output signal. When it is determined that the value is less than the type determination threshold value, the old type determination output is supplied to the old and new ATC signal transmission switching unit 15 as the old and new signal switching output signal.
図３は、既設の車上装置（旧信号対応車上装置）と新設の車上装置（新信号対応車上装置）における各ＴＤ信号のＭＳ比の例を示す波形図である。本例では、（ａ）図に示すように既設の車上装置のＭＳ比は「３：１」に設定され、（ｂ）図に示すように新設の車上装置のＭＳ比は「１：１」に設定されている。
なお、既設の車上装置では、ＴＤ信号をＭＳ比が「３：１」の振幅変調波としているが、これは、列車を検知する地上装置が抑圧方式としていたためであった（Ｍを大きくした方が抑圧作用に有利となるため）。現状では非抑圧方式となっており、Ｍを大きくする必要はない。そこで、新設の車上装置のＴＤ信号としてＭＳ比を「１：１」としている。
但し、ＭＳ比が「３：１」と「１：１」は、現状のシステムを考慮した一例であって、地上装置２で受信したＴＤ信号の高調波成分の相違に基づいて車上装置１の種類を判別できれば良いので、これらの比に限定されるものではない。
FIG. 3 is a waveform diagram showing an example of the MS ratio of each TD signal in an existing on-board device (old signal-compatible on-board device) and a new on-board device (new signal-compatible on-board device). In this example, the MS ratio of the existing onboard device is set to “3: 1” as shown in FIG. (A), and the MS ratio of the new onboard device is set to “1: 1,” as shown in FIG. 1 ”is set.
In the existing on-board device, the TD signal is an amplitude-modulated wave with an MS ratio of “3: 1” because the ground device that detects the train uses a suppression method (M is increased). Because it is more advantageous for suppression.) At present, it is a non-suppression method, and it is not necessary to increase M. Therefore, the MS ratio is set to “1: 1” as the TD signal of the newly installed on-board device.
However, the MS ratio of “3: 1” and “1: 1” is an example in consideration of the current system, and the on-board device 1 is based on the difference in the harmonic component of the TD signal received by the ground device 2. However, the ratio is not limited to these ratios.
図４はＭＳ比が「３：１」の変調波のスペクトルを示しており、旧信号対応車上装置におけるＴＤ信号のスペクトルに対応する。また、図５はＭＳ比が「１：１」の変調波のスペクトルを示しており、新信号対応車上装置におけるＴＤ信号のスペクトルに対応している。列車を検知するためには、ＴＤ信号の変調波の１次成分を検出する。そのため、ＭＳ比が変わったとしても、列車検知の機能に相違はない。 FIG. 4 shows a spectrum of a modulated wave having an MS ratio of “3: 1”, which corresponds to the spectrum of the TD signal in the on-board device corresponding to the old signal. FIG. 5 shows the spectrum of a modulated wave having an MS ratio of “1: 1”, which corresponds to the spectrum of the TD signal in the on-board device corresponding to a new signal. In order to detect the train, the primary component of the modulated wave of the TD signal is detected. Therefore, even if the MS ratio changes, there is no difference in the train detection function.
これに対し、ＭＳ比が「１：１」の場合は、１次、３次、５次、７次、９次、…というように変調波の奇数次成分しか発生せず、ＭＳ比が「３：１」の場合には、１次、２次、３次、５次、６次、７次、９次、…というように４次、８次、１２次、…が発生しない。すなわち、ＭＳ比が「１：１」の場合は、ＴＤ変調波の１周期Ｔの分割数ｎが２（ｎ＝２）であり、２の倍数の次数の変調波は発生しない。一方、ＭＳ比が「３：１」の場合は、１周期Ｔの分割数ｎが４（ｎ＝４）であり、４の倍数の次数の変調波は発生しない。ここで、ＭＳ比が「３：１」と「１：１」の場合の大きなスペクトルの相違は、２次、６次、１０次、…の成分が発生しているか否かである。本発明では、この点に着目し、新旧の車上装置の識別をＴＤ信号の２次成分の有無で判別する。なお、スペクトラム振幅が大きい２次成分が好ましいが、６次成分、１０次成分、…の有無でも判別できる。 On the other hand, when the MS ratio is “1: 1”, only odd-order components of the modulated wave are generated such as first, third, fifth, seventh, ninth,. In the case of “3: 1”, the fourth order, the eighth order, the twelfth order,... Do not occur such as the first order, the second order, the third order, the fifth order, the sixth order, the seventh order, the ninth order,. That is, when the MS ratio is “1: 1”, the division number n of one period T of the TD modulated wave is 2 (n = 2), and the modulated wave of the multiple of 2 is not generated. On the other hand, when the MS ratio is “3: 1”, the division number n in one period T is 4 (n = 4), and a modulated wave having a multiple of 4 is not generated. Here, the difference in the large spectrum when the MS ratio is “3: 1” and “1: 1” is whether or not secondary, sixth, tenth,... Components are generated. In the present invention, focusing on this point, the new and old on-board devices are discriminated by the presence or absence of the secondary component of the TD signal. Although a secondary component having a large spectrum amplitude is preferable, it can also be determined by the presence or absence of a sixth-order component, a tenth-order component,.
次に、上記のような構成において、図６のフローチャートにより列車の在線／非在線と車上装置１の種類の判別動作について説明する。車上装置１のＴＤ信号送信装置３から、既設の車上装置か新設の車上装置かに応じて図３（ａ）または図３（ｂ）に示したようなＴＤ信号が出力され、地上装置２のＴＤ信号受信装置５に入力される（ステップＳ１）。このＴＤ信号は、変調波検出部１１に入力され、検波器２０により検波された後、ＴＤ変調波の１次成分を通過する列車検知用フィルタ２５によりフィルタ処理が実行されるとともに（ステップＳ２）、ＴＤ変調波の２次成分を通過する種類判別用フィルタ２６によりフィルタ処理が実行される（ステップＳ３）。 Next, with reference to the flowchart of FIG. 6, the operation of discriminating between the on / off line of the train and the type of the on-board device 1 in the above configuration will be described. The TD signal as shown in FIG. 3 (a) or FIG. 3 (b) is output from the TD signal transmitting device 3 of the on-board device 1 depending on whether the existing on-board device or the newly installed on-board device. The signal is input to the TD signal receiving device 5 of the device 2 (step S1). The TD signal is input to the modulated wave detector 11 and detected by the detector 20, and then filtered by the train detection filter 25 that passes the primary component of the TD modulated wave (step S2). Filter processing is executed by the type discrimination filter 26 that passes through the secondary component of the TD modulated wave (step S3).
続いて、変調波識別部２２でフィルタ処理後のレベル値の検出が行われる。すなわち、列車検知用フィルタ２５の出力が列車検知用レベル検出器２７に供給されて列車検知用のレベル検出が行われる（ステップＳ４）。また、種類判別用フィルタ２６の出力が種類判別用レベル検出器２８に供給されて種類判別用のレベル検出が行われる（ステップＳ５）。上記列車検知用レベル検出器２７の出力信号は、ＴＤ信号検出部２３の列車検知用信号閾値判別部２９に供給されて１次成分が所定の閾値以上か否かが判定される（ステップＳ６）。上記種類判別用レベル検出器２８の出力信号は、ＴＤ信号検出部２３の種類判別用信号閾値判別部３０に供給されて２次成分が所定の閾値以上か否かが判定される（ステップＳ７）。 Subsequently, the modulated wave identification unit 22 detects the level value after filtering. That is, the output of the train detection filter 25 is supplied to the train detection level detector 27 to detect the level for train detection (step S4). Further, the output of the type discrimination filter 26 is supplied to the type discrimination level detector 28 to perform level detection for type discrimination (step S5). The output signal of the train detection level detector 27 is supplied to the train detection signal threshold determination unit 29 of the TD signal detection unit 23 to determine whether or not the primary component is equal to or greater than a predetermined threshold (step S6). . The output signal of the type determination level detector 28 is supplied to the type determination signal threshold value determination unit 30 of the TD signal detection unit 23 to determine whether the secondary component is equal to or greater than a predetermined threshold value (step S7). .
そして、列車検知用信号閾値判別部２９で１次成分が所定の閾値以上であると判定されると、列車の在線が検知されたと判断されて列車検知出力が出力され（ステップＳ８）、所定の閾値未満であると判定されると、列車は非在線であると判断されて列車非検知出力が出力される（ステップＳ９）。また、列車検知用信号閾値判別部２９で１次成分が所定の閾値以上であり、且つ種類判別用信号閾値判別部３０で２次成分が所定の閾値以上であると判定されると（ステップＳ１０）、種類判別用信号閾値判別部３０から新旧信号切替出力信号として新型判定出力が新旧ＡＴＣ信号送信切替部１５へ供給される（ステップＳ１２）。更に、列車検知用信号閾値判別部２９で１次成分が所定の閾値以上であり、且つ種類判別用信号閾値判別部３０で２次成分が所定の閾値未満であると判定されると（ステップＳ１１）、種類判別用信号閾値判別部３０から新旧信号切替出力信号として旧型判定出力が新旧ＡＴＣ信号送信切替部１５へ供給される（ステップＳ１３）。 When the train detection signal threshold discriminating unit 29 determines that the primary component is equal to or greater than the predetermined threshold, it is determined that the train is detected and a train detection output is output (step S8). If it is determined that it is less than the threshold value, it is determined that the train is non-existing and a train non-detection output is output (step S9). Further, when the train detection signal threshold determination unit 29 determines that the primary component is equal to or greater than the predetermined threshold and the type determination signal threshold determination unit 30 determines that the secondary component is equal to or greater than the predetermined threshold (step S10). ), A new type determination output is supplied from the type determination signal threshold value determination unit 30 to the old and new ATC signal transmission switching unit 15 as an old and new signal switching output signal (step S12). Further, when the train detection signal threshold determination unit 29 determines that the primary component is equal to or greater than the predetermined threshold and the type determination signal threshold determination unit 30 determines that the secondary component is less than the predetermined threshold (step S11). ), The old type determination output is supplied from the type determination signal threshold value determination unit 30 to the old and new ATC signal transmission switching unit 15 as the old and new signal switching output signal (step S13).
なお、ステップＳ１０とステップＳ１１については、より安全を考慮して、列車が在線時に新型または旧型を判定して信号を送ることにしているものであるが、列車の在線条件を考慮しなくても制御に支障がないため、このステップＳ１０とステップＳ１１を省略しても良い。この場合には、ステップＳ７で２次成分が所定の閾値以上であると判定されたときに、新旧信号切替出力信号として新型判定出力が新旧ＡＴＣ信号送信切替部１５へ供給され、２次成分が所定の閾値未満であると判定されたときに、新旧信号切替出力信号として旧型判定出力が新旧ＡＴＣ信号送信切替部１５へ供給される。
新旧ＡＴＣ信号送信切替部１５へ供給された旧型判定出力によって旧ＡＴＣ信号送信機１４の出力が選択され、新型判定出力によって新ＡＴＣ信号送信機１３の出力が選択される。そして、選択された送信機１３または１４の出力が、車上装置１のＡＴＣ信号用フィルタ１８を介してＡＴＣ信号受信装置４によって受信され、列車の在線／非在線と車上装置１の種類の判別結果に基づいて列車が制御される。
Steps S10 and S11 are for determining safety and sending a signal by determining whether the train is on the new or old model when it is on the line, but it is not necessary to consider the on-line condition of the train. Since there is no hindrance to control, step S10 and step S11 may be omitted. In this case, when it is determined in step S7 that the secondary component is greater than or equal to the predetermined threshold, the new type determination output is supplied to the old and new ATC signal transmission switching unit 15 as the old and new signal switching output signal, and the secondary component is When it is determined that it is less than the predetermined threshold value, the old type determination output is supplied to the old and new ATC signal transmission switching unit 15 as the old and new signal switching output signal.
The output of the old ATC signal transmitter 14 is selected by the old type determination output supplied to the new and old ATC signal transmission switching unit 15, and the output of the new ATC signal transmitter 13 is selected by the new type determination output. Then, the output of the selected transmitter 13 or 14 is received by the ATC signal receiving device 4 via the ATC signal filter 18 of the on-board device 1, and the type of the on / off line of the train and the type of the on-board device 1 The train is controlled based on the determination result.
上述したように、本発明では、従来と同等のＴＤ信号検出回路を用い、検出の論理を変えることにより、新信号対応車上装置（あるいは新設車両）か、旧信号対応車上装置（あるいは既設車両）かを判別する。すなわち、車上装置１から送信するＴＤ信号のＭＳ比を、新設車両か既設車両かに応じて変え、地上装置２で受信した信号の高調波の２次成分の有無を検出して新設車両か既設車両かを判別する。換言すれば、ＴＤ信号のＭＳ比が「１：１」なのか、「３：１」なのかによって出力される変調波のスペクトル成分に違いが生ずるので、ヌル点の違いを使って見分けることができる。よって、変調波の周波数などを変える必要がなく、既存の設備を生かせるので、復調の方式が異なる複雑な回路を設ける必要がない。 As described above, in the present invention, a TD signal detection circuit equivalent to the conventional one is used, and the detection logic is changed to change the onboard device corresponding to a new signal (or a new vehicle) or the onboard device corresponding to an old signal (or an existing device). Vehicle). That is, the MS ratio of the TD signal transmitted from the on-board device 1 is changed depending on whether the vehicle is a new vehicle or an existing vehicle, and the presence or absence of the secondary component of the harmonics of the signal received by the ground device 2 is detected. Determine if it is an existing vehicle. In other words, a difference occurs in the spectrum component of the modulated wave that is output depending on whether the MS ratio of the TD signal is “1: 1” or “3: 1”. it can. Therefore, it is not necessary to change the frequency of the modulation wave and the like, and it is not necessary to provide a complicated circuit having a different demodulation method because existing equipment can be used.
なお、図２における変調波検出部１１とＴＤ信号識別部１２に、破線で囲んだ回路部１００を付加する必要があるが、この回路部１００はフィルタ、レベル検出器及び新旧判定部等であり、回路規模の増大は比較的小さくて済む。また、列車の在線／非在線は、ＴＤ信号の高調波成分のうち１次成分で判別し、２次成分の有無で車上装置１の新旧を判別するので、レベルの大きな信号を利用でき、ＴＤ信号の出力を大きくする必要もない。 In addition, it is necessary to add a circuit unit 100 surrounded by a broken line to the modulated wave detection unit 11 and the TD signal identification unit 12 in FIG. 2, and this circuit unit 100 is a filter, a level detector, an old / new determination unit, and the like. The increase in circuit scale can be relatively small. In addition, the presence / absence of the train is determined by the primary component of the harmonic components of the TD signal, and the presence / absence of the secondary component is used to determine whether the on-board device 1 is new or old. There is no need to increase the output of the TD signal.
＜変形例１＞
上述した実施形態では、ＴＤ信号の高調波成分のうち１次成分で列車の在線／非在線を判定し、２次成分の有無で車上装置の種類を判別したが、ＴＤ信号の高調波成分のうち１次成分で列車の在線／非在線を判定し、１次成分と２次成分のレベル比で車上装置の種類を判別するようにしても良い。１次成分のレベルに対して、２次成分のレベルの相対的な比を考慮することで検出精度を上げることができる。
<Modification 1>
In the embodiment described above, the presence / absence of the train is determined by the primary component of the harmonic components of the TD signal, and the type of the on-board device is determined by the presence or absence of the secondary component. Among them, the presence / absence of the train may be determined by the primary component, and the type of the on-board device may be determined by the level ratio of the primary component and the secondary component. The detection accuracy can be improved by considering the relative ratio of the level of the secondary component to the level of the primary component.
＜変形例２＞
また、列車の在線は、ＴＤ信号の高調波成分のうち１次成分が所定の閾値以上のレベルのときに列車の在線と判定する。列車種類判別の際、１次成分が所定の閾値以上あることを判定条件に含めることで、耐ノイズ性を向上できる。
<Modification 2>
Moreover, the train line is determined to be a train line when the primary component of the harmonic components of the TD signal is at a level equal to or higher than a predetermined threshold. In determining the train type, the noise resistance can be improved by including in the determination condition that the primary component is greater than or equal to a predetermined threshold.
＜変形例３＞
ＭＳ比が「１：１」を新信号対応車上装置に割り当て、ＭＳ比が「３：１」を旧信号対応車上装置に割り当てる場合を例に取って説明したが、ＭＳ比の割り当てはこれに限られるものではないことは勿論であり、高調波成分の相違に基づいて車上装置の種類を判別できれば任意のＭＳ比に設定できる。
<Modification 3>
The case where the MS ratio “1: 1” is assigned to the onboard device corresponding to the new signal and the MS ratio “3: 1” is assigned to the onboard device corresponding to the old signal has been described as an example. Of course, the present invention is not limited to this, and any MS ratio can be set as long as the type of on-board device can be determined based on the difference in harmonic components.
＜変形例４＞
更に、ＴＤ信号識別部１２をハードウェアで実現する例について説明したが、マイクロコンピュータ等のソフトウェアでも同様な機能を実現できる。
<Modification 4>
Furthermore, although the example which implement | achieves the TD signal identification part 12 by hardware was demonstrated, the same function is realizable also by software, such as a microcomputer.
以上の実施形態で説明された回路構成や動作手順等については、本発明が理解・実施できる程度に概略的に示したものに過ぎない。従って本発明は、説明された実施形態に限定されるものではなく、特許請求の範囲に示される技術的思想の範囲を逸脱しない限り様々な形態に変更することができる。 The circuit configuration, operation procedure, and the like described in the above embodiments are merely 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 variously modified without departing from the scope of the technical idea shown in the claims.
１…車上装置、２…地上装置、３…ＴＤ信号送信装置、４…ＡＴＣ信号受信装置、５…ＴＤ信号受信装置、６…ＡＴＣ信号送信装置、７…搬送波発生部、８…変調部、９…増幅器、１０…変調波設定部、１１…変調波検出部、１２…ＴＤ信号識別部、１３…新ＡＴＣ信号送信機、１４…旧ＡＴＣ信号送信機、１５…新旧ＡＴＣ信号送信切替部、２０…検波器、２２…変調波識別部、２３…ＴＤ信号検出部、２５…列車検知用フィルタ、２６…種類判別用フィルタ、２７…列車検知用レベル検出器、２８…種類判別用レベル検出器、２９…列車検知用信号閾値判別部、３０…種類判別用信号閾値判別部、ＬＣ…ループコイル DESCRIPTION OF SYMBOLS 1 ... On-board apparatus, 2 ... Ground apparatus, 3 ... TD signal transmission apparatus, 4 ... ATC signal reception apparatus, 5 ... TD signal reception apparatus, 6 ... ATC signal transmission apparatus, 7 ... Carrier wave generation part, 8 ... Modulation part, DESCRIPTION OF SYMBOLS 9 ... Amplifier 10 ... Modulation wave setting part 11 ... Modulation wave detection part 12 ... TD signal identification part 13 ... New ATC signal transmitter 14 ... Old ATC signal transmitter 15 ... Old / old ATC signal transmission switching part DESCRIPTION OF SYMBOLS 20 ... Detector, 22 ... Modulation wave identification part, 23 ... TD signal detection part, 25 ... Train detection filter, 26 ... Type discrimination filter, 27 ... Train detection level detector, 28 ... Type discrimination level detector , 29... Train detection signal threshold value determination unit, 30... Type determination signal threshold value determination unit, LC... Loop coil
Claims (6)
前記車上装置から送信される列車検知信号のマークスペース比を車上装置の種類に応じて変え、地上装置で受信した列車検知信号の高調波成分の相違に基づいて車上装置の種類を判別する、ことを特徴とする列車制御システム。 The train detection signal modulated from the on-board device is transmitted to the loop coil installed on the ground, and the train detection signal received by the ground device via the loop coil is demodulated to detect the presence / absence of the train. A system for controlling
The mark space ratio of the train detection signal transmitted from the onboard device is changed according to the type of the onboard device, and the type of onboard device is determined based on the difference in harmonic components of the train detection signal received by the ground device. A train control system characterized by that.
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