JP4931954B2 - Traffic light control system - Google Patents

Traffic light control system Download PDF

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JP4931954B2
JP4931954B2 JP2009083928A JP2009083928A JP4931954B2 JP 4931954 B2 JP4931954 B2 JP 4931954B2 JP 2009083928 A JP2009083928 A JP 2009083928A JP 2009083928 A JP2009083928 A JP 2009083928A JP 4931954 B2 JP4931954 B2 JP 4931954B2
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lightning surge
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surge protection
traffic light
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JP2010234927A (en
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貫造 関
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Kyosan Electric Manufacturing Co Ltd
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Description

この発明は、鉄道の電子連動システムにおける信号機制御システム、特に雷サージの保護に関するものである。   The present invention relates to a traffic light control system in a railway electronic interlocking system, and more particularly to protection of a lightning surge.

鉄道の分野では列車を安全かつ効率的に運行するため、信号機や転てつ機などの相互間で、その取扱いについて一定の順序と制限をつける電子連動システムが開示されている。   In the field of railways, in order to operate trains safely and efficiently, an electronic interlocking system is disclosed in which a certain order and restrictions are imposed on the handling of traffic lights and switchboards.

この電子連動システムにおいて各駅における信号機の現示を制御する信号機制御装置においては、従来、大形の鉄道信号用電磁リレーを使用して信号機の現示制御が行われている。この鉄道信号用電磁リレーは、一般に雷サージ耐量が大きいため雷サージ保護の機能を必要としなかった。   In a traffic light control device that controls the display of traffic lights at each station in this electronic interlocking system, conventionally, the display control of traffic lights has been performed using a large electromagnetic relay for railway signals. Since this railway signal electromagnetic relay generally has a large lightning surge resistance, it does not require a lightning surge protection function.

近年、鉄道信号分野の制御において電子化が趨勢になり、鉄道信号用電磁リレーに代わって電子回路による制御が行われている。この電子回路は雷サージ耐量が小さいため、特許文献１に示すように、雷サージ保護機能を設けることが必要になった。この雷サージ保護機能を、例えば図２に示すように、進行（Ｇ）・注意（Ｙ）・停止（Ｒ）の３現示の信号機２と信号機２の現示制御を行う信号機制御装置３ａの間に設ける場合、信号機制御装置３ａと信号機２間の全ての制御線１４ａ〜１４ｄに例えば酸化亜鉛（ＺｎＯ）素子からなる非線形抵抗素子からなる雷サージ保護素子９と放電管１０とを直列に接続した雷サージ保護手段５を接続して接地することが一般的である。   In recent years, there has been a trend toward computerization in the control of the railway signal field, and control using an electronic circuit is performed instead of an electromagnetic relay for railway signals. Since this electronic circuit has a small lightning surge resistance, it is necessary to provide a lightning surge protection function as shown in Patent Document 1. For example, as shown in FIG. 2, the lightning surge protection function includes three signals of progress (G), caution (Y), and stop (R), and a signal control device 3 a that controls the signal 2. When provided in between, the lightning surge protection element 9 made of a non-linear resistance element made of, for example, a zinc oxide (ZnO) element and the discharge tube 10 are connected in series to all the control lines 14a to 14d between the traffic light control device 3a and the traffic light 2. It is common to connect the grounded lightning surge protection means 5 to ground.

この雷サージ保護手段５ａ〜５ｄにおいては、雷サージ保護手段５ａ〜５ｄの導通故障時に接地経由の閉回路が構成されて信号機２が不正現示となるおそれがあった。例えば図２において信号機制御装置３ａのＲ現示制御回路７ａが導通制御されて信号灯電源トランス４の電源出力ＢＸ、ＣＸが制御線１４ａと制御線１４ｄを通って信号機２のＲ現示灯６ａを点灯してＲ現示をしている状態で制御線１４ａと接地Ｅ間の雷サージ保護手段５ａの雷サージ保護素子９ａと放電管１０ａが故障となって導通し、かつ制御線１４ｂと接地Ｅ間の雷サージ保護手段５ｂの雷サージ保護素子９ｂと放電管１０ｂが故障となって導通すると、制御線１４ａと制御線１４ｂが接地Ｅ経由で接続され、正規のＲ現示のほかの信号機２のＹ現示灯６ｂが点灯する誤現示になってしまう。また、Ｒ現示灯６ａの現示回路が断線しているとＹ現示となる。このため列車の安全運行が損なわれるおそれが発生してしまう。   In the lightning surge protection means 5a to 5d, there is a possibility that a closed circuit via the ground is formed when the lightning surge protection means 5a to 5d has a conduction failure, and the traffic light 2 becomes illegal. For example, in FIG. 2, the R indication control circuit 7a of the traffic light control device 3a is controlled to be turned on, and the power outputs BX and CX of the signal lamp power transformer 4 are turned on through the control line 14a and the control line 14d. In the state where R is shown, the lightning surge protection element 9a and the discharge tube 10a of the lightning surge protection means 5a between the control line 14a and the ground E are faulty and become conductive, and between the control line 14b and the ground E. When the lightning surge protection element 9b of the lightning surge protection means 5b and the discharge tube 10b become faulty and become conductive, the control line 14a and the control line 14b are connected via the ground E, and other signals 2 of the normal R indication are connected. The Y indicator lamp 6b is erroneously turned on. Further, if the indication circuit of the R indication lamp 6a is disconnected, the Y indication is obtained. For this reason, there exists a possibility that the safe operation of a train may be impaired.

同様なことは、制御線１４ａと接地Ｅ間の雷サージ保護手段５ａの雷サージ保護素子９ａと放電管１０ａが故障して導通し、かつ、制御線１４ｃと接地Ｅ間の雷サージ保護手段５ｃの雷サージ保護素子９ｃと放電管１０ｃが故障して導通すると、正規のＲ現示のほかの信号機２のＧ現示灯６ｃが点灯する誤現示になってしまう。   Similarly, the lightning surge protection element 9a and the discharge tube 10a of the lightning surge protection means 5a between the control line 14a and the ground E fail and become conductive, and the lightning surge protection means 5c between the control line 14c and the ground E If the lightning surge protection element 9c and the discharge tube 10c fail and become conductive, the G indicator lamp 6c of the other traffic light 2 other than the regular R indicator is turned off.

この雷サージ保護手段５ａ〜５ｃで複数が同時に故障して導通する機会はほとんど無視できると考えられるが、一方、例えば制御線１４ａと接地Ｅ間の雷サージ保護手段５ａが故障により導通した後、時間が経過して制御線１４ｂと接地Ｅ間の雷サージ保護手段５ｂに故障が発生して導通することによる二重導通故障の発生は無視できない。   Although it is considered that the chance that a plurality of lightning surge protection means 5a to 5c simultaneously break down and become conductive is negligible, on the other hand, for example, after the lightning surge protection means 5a between the control line 14a and the ground E is turned on due to a failure, The occurrence of a double continuity failure due to the occurrence of a failure in the lightning surge protection means 5b between the control line 14b and the ground E after a lapse of time is not negligible.

また、一般に、雷サージ保護手段５ａ〜５ｄは大形で高価であり、全ての制御線１４ａ〜１４ｄに雷サージ保護手段５ａ〜５ｄを接続することは、経済性とともに大きな設置スペースを必要とする問題もある。   In general, the lightning surge protection means 5a to 5d are large and expensive, and connecting the lightning surge protection means 5a to 5d to all the control lines 14a to 14d requires a large installation space as well as economy. There is also a problem.

この発明は、このような問題を解消し、簡単な構成で雷サージから確実に保護するとともに信号機の誤現示を確実に防止することができる信号機制御システムを提供することを目的とするものである。   An object of the present invention is to provide a traffic light control system that can solve such problems, reliably protect against lightning surges with a simple structure, and reliably prevent false indications of traffic lights. is there.

この発明の信号機制御システムは、複数の現示灯を有する信号機と、該信号機の現示制御を行う信号機制御装置及び雷サージ保護手段を有し、前記信号機制御装置は、前記信号機の各現示灯の現示制御を行う複数の現示制御回路と、複数の雷サージ保護素子を有し、複数の現示制御回路の入力側は信号機電源の一方の出力端子に接続され、制御出力側はそれぞれ制御線を介して前記信号機の各現示灯に接続され、前記複数の雷サージ保護素子は、非線形抵抗素子で構成され、前記現示制御回路の制御出力側と、前記信号機電源の他方の出力端子と前記信号機の各現示灯に接続される制御線とを接続する電源線との間に接続され、前記雷サージ保護手段は、非線形抵抗素子で形成された雷サージ素子と放電管の直列接続で構成され、前記電源線が接続された制御線と接地間に接続されていることを特徴とする。   A traffic light control system according to the present invention includes a traffic light having a plurality of indicator lights, a traffic light controller for performing current control of the traffic lights and lightning surge protection means, and the traffic light controller is provided for each indicator light of the traffic light. It has multiple display control circuits that perform display control and multiple lightning surge protection elements. The input side of the multiple display control circuits is connected to one output terminal of the traffic signal power supply, and the control output side controls each Connected to each indicator light of the traffic light via a line, the plurality of lightning surge protection elements are composed of non-linear resistance elements, a control output side of the current control circuit, and the other output terminal of the traffic light power source, The lightning surge protection means is composed of a series connection of a lightning surge element formed of a non-linear resistance element and a discharge tube, and is connected between a power line connecting a control line connected to each indicator light of the traffic light. The power line Wherein the connected control line and is connected between the ground.

この発明は、信号機制御装置の入力側が信号機電源の一方の出力端子に接続され、出力側がそれぞれ制御線を介して信号機の各現示灯に接続されて、各現示灯の現示制御を行う複数の現示制御回路の出力側と、信号機電源の他方の出力端子と信号機の各現示灯に接続される制御線とを接続する電源線との間に非線形抵抗素子で構成された雷サージ保護素子をそれぞれ接続し、電源線が接続された制御線と接地間に非線形抵抗素子で構成された雷サージ保護素子と放電管とを直列接続して構成された雷サージ保護手段を接続したから、信号機の現示灯の現示制御を行っている現示制御回路の出力側に接続された雷サージ保護素子に故障が生じて導通したときに、現示制御を行っている現示灯を消灯させるとともに他の現示灯も点灯しない状態にして列車の安全運行が損なわれることを防ぐことができる。   In the present invention, the input side of the traffic signal controller is connected to one output terminal of the traffic signal power source, and the output side is connected to each indicator lamp of the traffic signal via the control line, respectively, and a plurality of indicators for controlling the indication of each indicator lamp A lightning surge protection element composed of a non-linear resistance element is connected between the output side of the indication control circuit and the power supply line connecting the other output terminal of the traffic light power supply and the control line connected to each indicator light of the traffic light. Since the lightning surge protection means configured by connecting the lightning surge protection element composed of a non-linear resistance element and the discharge tube in series between the control line to which the power line is connected and the ground is connected to each other, When the lightning surge protection element connected to the output side of the display control circuit that performs the display control of the display light fails and is turned on, the display light that is performing the display control is turned off and other The indicator light will not light up That the safe operation of the train is impaired Te can be prevented.

また、雷サージ保護手段の数を最小限にすることにより、雷サージ保護機能の低価格化を実現することができる。   In addition, by minimizing the number of lightning surge protection means, it is possible to reduce the price of the lightning surge protection function.

さらに、雷サージ保護素子を信号機制御装置に内蔵するから、信号機制御装置を設置するとき雷サージ保護手段だけを信号機制御装置の外部に接続すれば良く、施工を容易に行なうことができる。   Furthermore, since the lightning surge protection element is built in the traffic light control device, it is sufficient to connect only the lightning surge protection means to the outside of the traffic light control device when installing the traffic light control device, and the construction can be performed easily.

この発明の信号機制御システムの構成を示すブロック図である。It is a block diagram which shows the structure of the traffic signal control system of this invention. 従来の信号機制御システムの構成を示すブロック図である。It is a block diagram which shows the structure of the conventional signal control system.

図１は、この発明の信号機制御システムの構成を示すブロック図である。図に示すように、信号機制御システム１は、信号機２と、信号機２の現示制御を行う信号機制御装置３と、信号機電源トランス４及び雷サージ保護手段５を有する。信号機２は例えば進行（Ｇ）・注意（Ｙ）・停止（Ｒ）の３現示を示すＧ現示灯６ｃとＹ現示灯６ｂとＲ現示灯６ａを有する。   FIG. 1 is a block diagram showing the configuration of the traffic light control system of the present invention. As shown in the figure, the traffic light control system 1 includes a traffic light 2, a traffic light control device 3 that performs current control of the traffic light 2, a traffic light power transformer 4, and lightning surge protection means 5. The traffic light 2 has, for example, a G indicator lamp 6c, a Y indicator lamp 6b, and an R indicator lamp 6a indicating three indications of progress (G), attention (Y), and stop (R).

信号機制御装置３は信号機２のＲ現示灯６ａの現示制御を行うＲ現示制御回路７ａと、Ｙ現示灯６ｂの現示制御を行うＹ現示制御回路７ｂと、Ｇ現示灯６ｃの現示制御を行うＧ現示制御回路７ｃと、雷サージ保護素子８ａ〜８ｃを有する。Ｒ現示制御回路７ａとＹ現示制御回路７ｂ及びＧ現示制御回路７ｃは信号機電源トランス４の一方の電源出力ＢＸを入力する入力端子１１と各制御出力端子１３ａ〜１３ｃを有する。各制御出力端子１３ａ〜１３ｃは制御線１４ａ〜制御線１４ｃにより信号機２のＲ現示灯６ａとＹ現示灯６ｂとＧ現示灯６ｃにそれぞれ接続されている。雷サージ保護素子８ａ〜８ｃは非線形抵抗素子、例えば酸化亜鉛（ＺｎＯ）素子で構成され、Ｒ現示制御回路７ａとＹ現示制御回路７ｂ及びＧ現示制御回路７ｃの制御出力端子１３ａ〜１３ｃと、信号機制御装置３に設けられ、信号機電源トランス４の他方の出力端子ＣＸに接続される端子１２及び信号機２のＲ現示灯６ａとＹ現示灯６ｂとＧ現示灯６ｃとの間に接続された制御線１４ｄが接続される端子１５とを連結した電源線１６との間に接続されている。また、雷サージ保護手段５は直列に接続された非線形抵抗素子例えば酸化亜鉛（ＺｎＯ）素子である雷サージ保護素子９と放電管１０とからなり、制御線１４ｄと接地Ｅ間に接続されている。   The traffic signal control device 3 includes an R indication control circuit 7a that performs indication control of the R indicator lamp 6a of the traffic signal 2, a Y indication control circuit 7b that performs indication control of the Y indicator lamp 6b, and a current indication of the G indicator lamp 6c. G display control circuit 7c for performing display control and lightning surge protection elements 8a to 8c. The R display control circuit 7a, the Y display control circuit 7b, and the G display control circuit 7c have an input terminal 11 for inputting one power output BX of the traffic light power transformer 4, and control output terminals 13a to 13c. The control output terminals 13a to 13c are connected to the R indicator lamp 6a, the Y indicator lamp 6b, and the G indicator lamp 6c of the traffic light 2 through control lines 14a to 14c, respectively. The lightning surge protection elements 8a to 8c are composed of non-linear resistance elements such as zinc oxide (ZnO) elements, and control output terminals 13a to 13c of the R indication control circuit 7a, the Y indication control circuit 7b, and the G indication control circuit 7c. And connected to the terminal 12 connected to the other output terminal CX of the traffic signal power transformer 4 and between the R indicator lamp 6a, the Y indicator lamp 6b, and the G indicator lamp 6c of the traffic signal 2. The control line 14d is connected between the power line 16 and the terminal 15 to which the control line 14d is connected. The lightning surge protection means 5 includes a lightning surge protection element 9 and a discharge tube 10 which are non-linear resistance elements such as zinc oxide (ZnO) elements connected in series, and is connected between the control line 14d and the ground E. .

この信号機制御システム１で信号機制御装置３に設けた雷サージ保護素子８ａ〜８ｃと雷サージ保護素子９を構成するＺｎＯ素子は、印加電圧が低く、非直線現象が起こる前の領域で高抵抗となっており、雷サージが流れた後、印加電圧が低くなると絶縁抵抗が元の高抵抗となって絶縁性を回復して続流を防止することができる。また、制御線１４ｄと接地Ｅ間に接続された雷サージ保護手段５を構成する放電管１０は雷サージのような高電位ではアーク放電を起こして電流を流し、一度放電が生じると電流を遮断しない限り通電状態のままになる。この雷サージ保護素子８ａ〜８ｃと雷サージ保護手段５を直列に接続することにより、雷サージが発生したときに続流の遮断能力と雷サージ流入抑止効果を得ることができる。   The lightning surge protection elements 8a to 8c and the lightning surge protection element 9 provided in the traffic light control device 3 in the traffic light control system 1 have a low applied voltage and a high resistance in a region before the nonlinear phenomenon occurs. Thus, after the lightning surge flows, when the applied voltage is lowered, the insulation resistance becomes the original high resistance, and the insulation is restored and the continuity can be prevented. Further, the discharge tube 10 constituting the lightning surge protection means 5 connected between the control line 14d and the ground E causes an arc discharge at a high potential such as a lightning surge to flow current, and once the discharge occurs, the current is cut off. It will remain energized unless otherwise. By connecting the lightning surge protection elements 8a to 8c and the lightning surge protection means 5 in series, it is possible to obtain a continuity blocking ability and a lightning surge inflow suppression effect when a lightning surge occurs.

この信号機制御システム１において、信号機制御装置３のＲ現示制御回路７ａが導通制御されて信号灯電源トランス４の出力ＢＸと出力ＣＸが制御線１４ａと制御線１４ｄを通って信号機２のＲ現示灯６ａを点灯してＲ現示をしている状態で、Ｒ現示制御回路７ａの制御出力端子１３ａと電源線１６の間に接続された雷サージ保護素子８ａが故障して導通すると、信号機電源トランス４の電源出力ＢＸ，ＣＸがＲ現示制御回路７ａと導通した雷サージ保護素子８ａにより短絡される。このためＲ現示灯６ａが消灯し、他のＹ現示灯６ｂとＧ現示灯６ｃも点灯しない状態になる。この状態は、Ｒ現示と同等であるため列車の安全運行が損なわれることを防ぐことができる。   In this traffic light control system 1, the R indication control circuit 7a of the traffic signal control device 3 is controlled to conduct, and the output BX and the output CX of the signal lamp power transformer 4 pass through the control line 14a and the control line 14d and the R indication lamp of the traffic light 2 When the lightning surge protection element 8a connected between the control output terminal 13a of the R indication control circuit 7a and the power supply line 16 breaks down and is turned on in the state where the R indication is indicated by lighting the 6a, the signal power supply The power supply outputs BX and CX of the transformer 4 are short-circuited by the lightning surge protection element 8a that is electrically connected to the R indication control circuit 7a. Therefore, the R indicator lamp 6a is turned off, and the other Y indicator lamp 6b and the G indicator lamp 6c are not turned on. Since this state is equivalent to the R indication, it is possible to prevent the safe operation of the train from being impaired.

この現象は雷サージ保護素子８ｂと雷サージ保護素子８ｃが故障して導通した場合でも同様であり、さらに、雷サージ保護素子８ａ〜８ｃの複数、例えば雷サージ保護素子８ａと雷サージ保護素子８ｂが故障して導通した場合もＲ現示灯６ａとＹ現示灯６ｃ及びＧ現示灯６ｃのいずれも点灯しないで済む。   This phenomenon is the same even when the lightning surge protection element 8b and the lightning surge protection element 8c fail and become conductive, and more than one of the lightning surge protection elements 8a to 8c, for example, the lightning surge protection element 8a and the lightning surge protection element 8b. Even if a failure occurs, the R indicator lamp 6a, the Y indicator lamp 6c, and the G indicator lamp 6c need not be lit.

また、信号機制御装置３のＲ現示制御回路７ａとＹ現示制御回路７ｂ及びＧ現示制御回路７ｃの制御出力端子１３ａ〜１３ｃと電源線１６との間に雷サージ保護素子８ａ〜８ｃを接続し、制御線１４ｄと接地Ｅとの間に雷サージ保護手段５を接続することにより、雷サージ保護手段５の使用数を最小限にすることができ、雷サージ保護機能の低価格化を実現することができる。   Further, lightning surge protection elements 8a to 8c are provided between the control output terminals 13a to 13c of the R indication control circuit 7a and the Y indication control circuit 7b and the G indication control circuit 7c of the traffic signal control device 3 and the power line 16. By connecting and connecting the lightning surge protection means 5 between the control line 14d and the ground E, the number of lightning surge protection means 5 can be minimized and the lightning surge protection function can be reduced in price. Can be realized.

さらに、雷サージ保護素子８ａ〜８ｃを信号機制御装置３に内蔵するから、信号機制御装置３を設置するとき雷サージ保護手段５だけを外部で接続すれば良く、施工を容易に行なうことができる。   Furthermore, since the lightning surge protection elements 8a to 8c are built in the traffic signal control device 3, when installing the traffic signal control device 3, only the lightning surge protection means 5 needs to be connected outside, and the construction can be performed easily.

１；信号機制御システム、２；信号機、３；信号機制御装置、
４；信号機電源トランス、５；雷サージ保護手段、６現示灯、７；現示制御回路、
８，９；雷サージ保護素子、１０；放電管、１４；制御線。 1; traffic light control system, 2; traffic light, 3; traffic light control device,
4; traffic signal power transformer, 5; lightning surge protection means, 6 indicator light, 7; indicator control circuit,
8, 9: Lightning surge protection element, 10: Discharge tube, 14: Control line.

特開２００３−１６５４４０号公報JP 2003-165440 A

Claims (1)

複数の現示灯を有する信号機と、該信号機の現示制御を行う信号機制御装置及び雷サージ保護手段を有し、
前記信号機制御装置は、前記信号機の各現示灯の現示制御を行う複数の現示制御回路と、複数の雷サージ保護素子を有し、複数の現示制御回路の入力側は信号機電源の一方の出力端子に接続され、制御出力側はそれぞれ制御線を介して前記信号機の各現示灯に接続され、前記複数の雷サージ保護素子は非線形抵抗素子で構成され、前記現示制御回路の制御出力側と、前記信号機電源の他方の出力端子と前記信号機の各現示灯に接続される制御線とを接続する電源線との間に接続され、
前記雷サージ保護手段は、非線形抵抗素子で形成された雷サージ素子と放電管の直列接続で構成され、前記電源線が接続された制御線と接地間に接続されていることを特徴とする信号機制御システム。 A traffic light having a plurality of indicator lights, a traffic light control device for performing a display control of the traffic light, and a lightning surge protection means;
The signal control device includes a plurality of display control circuits that perform display control of each of the display lights of the traffic light, and a plurality of lightning surge protection elements, and the input side of the plurality of display control circuits is one of the signal power supply The control output side is connected to each indicator lamp of the traffic light via a control line, the plurality of lightning surge protection elements are composed of nonlinear resistance elements, and the control output of the indicator control circuit Connected to the other side and a power line connecting the other output terminal of the traffic signal power source and a control line connected to each indicator lamp of the traffic signal,
The lightning surge protection means includes a lightning surge element formed of a non-linear resistance element and a discharge tube connected in series, and is connected between a control line to which the power line is connected and a ground. Control system.
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