JP6175408B2 - On-board communication device - Google Patents

On-board communication device Download PDF

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JP6175408B2
JP6175408B2 JP2014121706A JP2014121706A JP6175408B2 JP 6175408 B2 JP6175408 B2 JP 6175408B2 JP 2014121706 A JP2014121706 A JP 2014121706A JP 2014121706 A JP2014121706 A JP 2014121706A JP 6175408 B2 JP6175408 B2 JP 6175408B2
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communication device
test signal
telegram
ground communication
signal
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JP2016001842A (en
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洸太郎 福井
洸太郎 福井
和貴 森田
和貴 森田
竹原　剛
剛 竹原
裕 有田
有田　　裕
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Hitachi Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/40—Adaptation of control equipment on vehicle for remote actuation from a stationary place
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0007—Measures or means for preventing or attenuating collisions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • 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 train, e.g. to release brake or 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3822—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving specially adapted for use in vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/12—Speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Description

本発明は，地上通信装置と通信を行う移動体上に設けられた車上通信装置に関する。   The present invention relates to an on-vehicle communication device provided on a mobile body that communicates with a ground communication device.

本分野の背景技術として，特開２００１−１８６６０６号公報（特許文献１）がある。この公報には，車上通信装置において地上通信装置と通信を行うアンテナの他に車上通信装置の受信装置を診断するための試験用アンテナを用意し，車上通信装置の起動時に受信装置の診断を行うといった方法が提案されている。
また，特開２００８−９９５１５号公報（特許文献２）には，二重化された車上通信装置のいずれか一方を主系，他方を従系とし，主系及び従系を診断する検査装置を備えることで，正常か否か判定を行い装置の故障を検出することができるといった方法も提案されている。 As background art in this field, there is JP-A-2001-186606 (Patent Document 1). In this publication, in addition to the antenna that communicates with the ground communication device in the on-board communication device, a test antenna for diagnosing the reception device of the on-board communication device is prepared. A method of making a diagnosis has been proposed.
Japanese Patent Laying-Open No. 2008-99515 (Patent Document 2) includes an inspection device that diagnoses the main system and the subordinate system, with one of the duplicated on-board communication devices as the main system and the other as the subordinate system. Thus, a method has been proposed in which it is possible to determine whether the device is normal and to detect a failure of the apparatus.

特開２００１−１８６６０６号公報JP 2001-186606 A 特開２００８−９９５１５号公報JP 2008-99515 A

一般に，地上側に設置された地上通信装置と車上通信装置との電文情報の送受信は，以下のように行われる。まず，車上通信装置が地上通信装置に対して電力波を送信して電力を給電する。そして，地上通信装置はこの電力によって起動し，車上通信装置に対して電文情報を繰り返し送信し，これを車上通信装置が受信するのである。したがって，車上通信装置が，地上通信装置から受信した電文情報を活用して，移動体を安全に制御するためには，地上通信装置からの電文情報を確実に受信することが求められる。   In general, transmission / reception of telegram information between a ground communication device installed on the ground side and an on-board communication device is performed as follows. First, the on-board communication device transmits power waves to the ground communication device to supply power. Then, the ground communication device is activated by this electric power, and repeatedly transmits the telegram information to the on-board communication device, which is received by the on-board communication device. Therefore, in order for the on-board communication device to safely control the mobile object using the message information received from the ground communication device, it is required to reliably receive the message information from the ground communication device.

しかし，車上通信装置の受信部が故障すると，地上通信装置からの情報を受信することができなくなり，地上通信装置を判別することができなくなってしまう。このため，地上通信装置からの電文情報を確実に受信するには，車上通信装置の受信部の自己診断を行う必要がある。   However, if the receiving unit of the on-board communication device fails, information from the ground communication device cannot be received and the ground communication device cannot be identified. For this reason, in order to reliably receive the telegraphic information from the ground communication device, it is necessary to perform a self-diagnosis of the receiving unit of the on-board communication device.

特許文献１に示す一重系の車上通信装置では，移動体の走行を安全に行うために，車上通信装置の起動時に受信装置の診断を行うことで健全性を確認することができるが，車上通信装置が長期間稼動している場合には，この間，受信装置の診断を行うことができない。このため，受信装置が故障しても検知することができず，地上通信装置を判別することができなくなってしまう。そのため，場合によっては，移動体を停止させてしまうことが起こり得る。   In the single-system on-board communication device shown in Patent Document 1, the soundness can be confirmed by diagnosing the receiving device when the on-board communication device is started in order to safely travel the moving body. If the on-board communication device has been operating for a long time, the receiving device cannot be diagnosed during this time. For this reason, even if the receiving device fails, it cannot be detected and the ground communication device cannot be identified. Therefore, depending on the case, it may happen that the moving body is stopped.

また，特許文献１に示す構成においては，移動体の走行中に自己の受信装置が正常か否か確認するために信号を送出して診断を行うと，地上通信装置から送られてくる信号と，自己の受信装置の診断信号とが衝突してしまい，地上通信装置からの信号に影響を与える虞がある。このため，結果的に，地上通信装置との通信が失敗することもある。したがって，特許文献１に示す一重系の車上通信装置では，移動体が長期間稼動する場合に故障を検知することができず，走行中に自己の受信装置の診断を行った場合においても，地上通信装置との間の通信を妨害することとなる。   In the configuration shown in Patent Document 1, when a diagnosis is performed by sending a signal to check whether or not the receiving device is normal while the mobile body is traveling, a signal sent from the ground communication device The diagnostic signal of the receiver itself may collide, which may affect the signal from the ground communication device. As a result, communication with the ground communication device may fail as a result. Therefore, in the single-system on-board communication device shown in Patent Document 1, a failure cannot be detected when the moving body is operated for a long period of time, and even when the receiving device is diagnosed while traveling, Communication with the ground communication device is obstructed.

このような点を解決するため，特許文献２においては，車上通信装置を二重化し，主系及び従系を診断する検査装置を備えることで，受信装置の診断を可能としている。そのため，移動体が走行時においても地上通信装置との通信を妨害することなく通信が可能であるが，地上通信装置と通信を行うアンテナは二重化されておらず，車上通信装置本体を二重化していることから，装置を実装するスペース，コストが増大することとなる。   In order to solve such a point, in Patent Document 2, the on-board communication device is duplicated, and the receiving device is diagnosed by providing an inspection device for diagnosing the main system and the subordinate system. For this reason, even when the mobile unit is traveling, communication is possible without interfering with communication with the terrestrial communication device, but the antenna that communicates with the terrestrial communication device is not duplexed. This increases the space and cost for mounting the device.

上記課題を解決するために，本発明における車上通信装置は，地上通信装置の電文信号を模擬した試験信号を生成する試験信号生成回路，前記試験信号生成回路で生成された信号を車上通信装置内の車上受信アンテナに対して送信する試験信号送信アンテナ，及び，前記試験信号生成回路で生成された信号を，前記試験信号送信アンテナを介さずに，前記車上通信装置の復号回路へ送信する試験信号送信経路を備えている。   In order to solve the above-described problems, an on-board communication device according to the present invention includes a test signal generation circuit that generates a test signal that simulates a telegram signal of a ground communication device, and an on-board communication of the signal generated by the test signal generation circuit. A test signal transmitting antenna for transmitting to the on-vehicle receiving antenna in the apparatus and a signal generated by the test signal generating circuit to the decoding circuit of the on-vehicle communication apparatus without passing through the test signal transmitting antenna. A test signal transmission path for transmission is provided.

本発明によれば，一重系の車上通信装置であるためコストが増大しない。また，地上通信装置からの電文信号との衝突を起こさずに自己の受信装置の診断を行うことが可能である。このため，高速走行時においても地上通信装置との間で安定した通信を行いながら自己診断を行うことができる。上記以外の課題，構成及び効果は，以下の実施形態の説明により明らかにされる。   According to the present invention, since it is a single system on-board communication device, the cost does not increase. In addition, it is possible to diagnose its own receiving device without causing a collision with a telegram signal from the ground communication device. For this reason, even during high-speed traveling, self-diagnosis can be performed while performing stable communication with the ground communication device. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

本発明の実施例１における，車上通信装置の概略構成図である。It is a schematic block diagram of the on-board communication apparatus in Example 1 of this invention. 従来例における，車上通信装置の概略構成図である。It is a schematic block diagram of the on-board communication apparatus in a prior art example. 従来例における，試験信号と地上通信装置の電文信号の通信移動距離と，通信可能範囲との関係を説明する図である。It is a figure explaining the relationship between the communication movement distance of the test signal and the telegram signal of a ground communication apparatus, and the communicable range in a prior art example. 本発明の実施例１における，試験信号と地上通信装置の電文信号の通信移動距離と，通信可能範囲との関係を説明する図である。It is a figure explaining the relationship between the communication movement distance of the test signal and the telegram signal of a ground communication apparatus, and the communicable range in Example 1 of this invention. 本発明の実施例２における，車上通信装置の概略構成図である。It is a schematic block diagram of the on-board communication apparatus in Example 2 of this invention. 試験信号送信処理において，送信する試験信号波の出力強度を，地上通信装置検出を行う最低受信強度以上に設定した場合の説明図である。In a test signal transmission process, it is explanatory drawing at the time of setting the output intensity of the test signal wave to transmit more than the minimum receiving intensity which detects a ground communication apparatus. 試験信号送信処理において，送信する試験信号波の出力強度を，地上通信装置検出を行う最低受信強度未満に設定した場合の説明図である。In a test signal transmission process, it is explanatory drawing at the time of setting the output strength of the test signal wave to transmit to less than the minimum receiving strength which performs ground communication apparatus detection. 本発明の実施例３における，車上通信装置の概略構成図である。It is a schematic block diagram of the on-board communication apparatus in Example 3 of this invention.

以下，実施例を図１，図２，図３，図４を用いて説明する。
（実施例１）
図１は，本発明に係る診断機能を適用した実施形態を示す概略構成図であり，図２は従来技術における実施形態を示す概略構成図である。図３は従来例の場合の車上通信装置と地上通信装置通信処理の動作を説明する図であり，図４は本実施例の車上通信装置と地上通信装置の通信処理の動作を説明する図である。 Hereinafter, an embodiment will be described with reference to FIG. 1, FIG. 2, FIG. 3, and FIG.
Example 1
FIG. 1 is a schematic configuration diagram showing an embodiment to which a diagnostic function according to the present invention is applied, and FIG. 2 is a schematic configuration diagram showing an embodiment in the prior art. FIG. 3 is a diagram for explaining the operation of the on-board communication device and the ground communication device communication processing in the case of the conventional example, and FIG. 4 is for explaining the communication processing operation of the on-board communication device and the ground communication device of this embodiment. FIG.

図１，図２に示す地上通信装置１０２は地上側に設置され，車上通信装置１０１から電力波を受信し電力を得ることで起動し，車上通信装置１０１と通信を行う。一般的に地上通信装置１０２は，電力波を受信し続けている限り，常に同じ電文信号を繰り返し送信し続ける。地上通信装置が発信する電文長は地上通信装置毎に固定されており，１０００ビット程度のＬｏｎｇ電文を送信するものや，数百ビット程度のｓｈｏｒｔ電文を送信するものが一般的であるが，電文長の長さは２種類には限られず，３種類以上の場合も存在する。車上通信装置１０１では，受信した電文長の異なる電文信号に対して，それぞれの電文長に応じた固有の復号手段を有している。 The ground communication device 102 shown in FIGS. 1 and 2 is installed on the ground side, is activated by receiving power waves from the on-board communication device 101 and obtaining power, and communicates with the on-board communication device 101. In general, as long as the ground communication device 102 continues to receive power waves, it always transmits the same telegram signal repeatedly. The message length transmitted by the terrestrial communication device is fixed for each terrestrial communication device, and a message that transmits a long message of about 1000 bits and a message that transmits a short message of about several hundred bits are generally used. The length of the length is not limited to two types, and there are cases where there are more than two types. The on-board communication device 101 has unique decoding means corresponding to each message length for the received message signals having different message lengths.

図２における従来技術に係る車上通信装置１０１には，地上通信装置１０２と電磁結合して所定値以上の磁束強度の電文信号を受信する受信部１０６が搭載されている。該受信部１０６には，地上通信装置１０２より受信した電文信号の受信強度を検出する受信強度検出回路１１２や，地上通信装置検知判定部１１３，受信した電文信号を復調する復調回路１１４，復調された信号から電文情報を復号する復号回路１１５等が設けられている。   The on-board communication device 101 according to the prior art in FIG. 2 is equipped with a receiving unit 106 that electromagnetically couples with the ground communication device 102 and receives a telegram signal having a magnetic flux intensity equal to or greater than a predetermined value. The reception unit 106 includes a reception strength detection circuit 112 that detects the reception strength of a telegram signal received from the ground communication device 102, a ground communication device detection determination unit 113, and a demodulation circuit 114 that demodulates the received telegram signal. A decryption circuit 115 for decrypting the telegram information from the received signal is provided.

また，車上通信装置には，試験信号を生成する試験信号生成回路１０９と，試験信号の送信を地上通信装置検知判定部１１３に通知する試験信号送信通知回路１１６と，試験信号送信アンテナ１１０を用いて前記試験信号を前記車上通信装置１０１の受信部１０６へ送信する手段，地上通信装置１０２に電力波を供給するための電力波送信部１０４と電力波送信アンテナ１０５と，地上通信装置１０２や試験信号送信アンテナと送受信を行う送受信アンテナが設けられている。 The on-board communication device includes a test signal generation circuit 109 that generates a test signal, a test signal transmission notification circuit 116 that notifies the ground communication device detection determination unit 113 of transmission of the test signal, and a test signal transmission antenna 110. Means for transmitting the test signal to the receiving unit 106 of the on-board communication device 101, a power wave transmitting unit 104 for supplying a power wave to the ground communication device 102, a power wave transmitting antenna 105, and the ground communication device 102. And a transmission / reception antenna for performing transmission / reception with the test signal transmission antenna.

さらに，車上通信装置１０１には，試験信号を送出するよう試験信号生成回路に指示する機能，及び，試験結果の判定および地上通信装置１０２から受信した信号が正しく受信，復調・復号がなされているか判定し，異常な信号であった場合，信号の出力を止め，異常電文検知を出力する機能を備えた制御部１０３が設けられている。   Further, the on-board communication device 101 has a function for instructing the test signal generation circuit to send a test signal, and a test result determination and a signal received from the ground communication device 102 are correctly received, demodulated and decoded. A control unit 103 having a function of stopping the output of the signal and outputting an abnormal message detection is provided.

本発明の第１実施例である図１においては，図２に示す構成に加え，試験信号生成回路１０９で生成された試験信号を前記試験信号送信アンテナ１１０を介さずに前記車上通信装置１０１の受信部１０６の中の復号回路１１５へ送信する手段である試験信号送信経路１１１を備えている。このような構成により，電文長の異なる複数種類の電文信号に対応しながら車上通信装置１０１の受信部１０６の診断を行うのである。 In FIG. 1, which is the first embodiment of the present invention, in addition to the configuration shown in FIG. Is provided with a test signal transmission path 111 which is a means for transmitting to the decoding circuit 115 in the receiver 106. With such a configuration, the receiving unit 106 of the on-board communication device 101 is diagnosed while supporting a plurality of types of message signals having different message lengths.

本実施例の以下の説明では，地上通信装置１０２から送られてくる電文信号が２種類であることを前提として説明するが，３種類以上ある場合でも本発明が適用可能であることは言うまでもない。
本発明において，受信部の診断を行うためには，まず，制御部１０３の指示に基づき，試験信号送信部１０８の試験信号生成回路１０９において試験信号が生成され，試験信号生成回路１０９により生成されたＬｏｎｇ電文信号は，試験信号送信経路１１１を経由して，受信部１０６内の復号回路１１５に入力される。
一方，試験信号生成回路１０９により生成されたＳｈｏｒｔ電文信号は，試験信号送信アンテナ１１０から送信され，送受信アンテナ１０７にて受信するように構成されている。
つまり，送信時間の短いＳｈｏｒｔ電文信号は試験信号送信アンテナ１１０より送信することで，送受信アンテナ１０７からの受信装置の経路を診断し，送信時間の長いＬｏｎｇ電文信号は，試験信号送信アンテナ１１０を介さずに復号回路へ入力し，復号回路以降の診断を行うこととなる。
なお，試験信号が送信中であることは，試験信号送信通知回路１１６を通じて，地上通信装置検知判定部１１３にも伝達されている。 In the following description of the present embodiment, description is made on the assumption that there are two types of telegram signals transmitted from the ground communication device 102, but it goes without saying that the present invention can be applied even when there are three or more types. .
In the present invention, in order to diagnose the receiving unit, first, based on an instruction from the control unit 103, a test signal is generated in the test signal generation circuit 109 of the test signal transmission unit 108, and is generated by the test signal generation circuit 109. The long telegram signal is input to the decryption circuit 115 in the reception unit 106 via the test signal transmission path 111.
On the other hand, the Short telegram signal generated by the test signal generation circuit 109 is transmitted from the test signal transmission antenna 110 and received by the transmission / reception antenna 107.
In other words, a short telegram signal with a short transmission time is transmitted from the test signal transmission antenna 110 to diagnose the path of the receiving device from the transmission / reception antenna 107, and a long telegram signal with a long transmission time passes through the test signal transmission antenna 110. Without being input to the decoding circuit, diagnosis after the decoding circuit is performed.
Note that the fact that the test signal is being transmitted is also transmitted to the ground communication device detection determination unit 113 through the test signal transmission notification circuit 116.

図３，図４を用いて，地上通信装置１０２からの電文信号と試験信号との間で衝突，混信等の障害（以下，「衝突」という。）が発生する場合の状況を説明する。
地上通信装置１０２からの電文信号については，受信可能な一定範囲の距離が存在する。ここでは，受信可能なコンタクト距離３０５をＴ（固定長）とし，地上通信装置１０２からの電文と試験信号電文の伝送速度をｘとする。この時，移動体の走行速度をＶとすると，移動体の走行速度Ｖの上昇に伴い，コンタクト距離Ｔ内で受信可能なビット数は減少することとなる。 The situation when a failure such as collision or interference (hereinafter referred to as “collision”) occurs between the telegram signal from the ground communication apparatus 102 and the test signal will be described with reference to FIGS.
The telegram signal from the ground communication device 102 has a certain range of receivable distance. Here, it is assumed that the receivable contact distance 305 is T (fixed length), and the transmission rate of the message from the ground communication device 102 and the test signal message is x. At this time, if the traveling speed of the moving body is V, the number of bits that can be received within the contact distance T decreases as the traveling speed V of the moving body increases.

図３に示すように，走行中にＳｈｏｒｔ電文の１電文を送信するのに要する移動距離をＴｓｈｏｒｔ ３０６，Ｌｏｎｇ電文の１電文を送信するのに要する移動距離をＴｌｏｎｇ ３０７とし，Ｔｓｈｏｒｔ ＋ Ｔｌｏｎｇ≦Ｔが成り立つとする。この時，高速走行時において，試験信号Ｓｈｏｒｔ電文３０１の送信中に，移動体がＳｈｏｒｔ電文信号を送信する地上通信装置の受信可能なコンタクト範囲にさしかかった場合，地上通信装置から連続して送られてくるｓｈｏｒｔ電文信号３０３が，試験信号Ｓｈｏｒｔ電文３０１と衝突し，地上通信装置のＳｈｏｒｔ電文３０３の１電文をつぶしてしまう。しかし，この場合，制御部が地上通信装置の検知に基づき，試験信号の送信及び復調，復号を中止するよう指示すれば，残された受信可能コンタクト距離内で次のＳｈｏｒｔ電文信号を受信することが可能である。
しかし，試験信号としてＬｏｎｇ電文３０２を送信している最中に，地上通信装置１０２からＬｏｎｇ電文３０４が繰り返し送られてきていた場合，Ｌｏｎｇ電文３０４の１つをつぶしてしまうと，この場合，制御部が地上通信装置の検知に基づき，試験信号の送信及び復調，復号を中止するよう指示しても，残された受信可能コンタクト距離内では次のＬｏｎｇ電文を受信することができない。そのため，地上通信装置１０２からのＬｏｎｇ電文３０４を見落としてしまうこととなる。 As shown in FIG. 3, the moving distance required moving distance it takes to transmit one message of the Short message during traveling to transmit 1 telegram T short 306, Long message and T long 307, T short + Assume that T long ≦ T holds. At this time, when the mobile body reaches the receivable contact range of the ground communication device that transmits the Short telegram signal during transmission of the test signal Short telegram 301 during high-speed traveling, it is continuously transmitted from the ground communication device. The incoming short telegram signal 303 collides with the test signal Short telegram 301 and destroys one telegram of the short telegram 303 of the ground communication device. However, in this case, if the control unit instructs to stop transmission, demodulation, and decoding of the test signal based on detection of the ground communication device, the next Short telegram signal is received within the remaining receivable contact distance. Is possible.
However, if the Long telegram 304 is repeatedly sent from the ground communication device 102 while the Long telegram 302 is being transmitted as a test signal, if one of the Long telegrams 304 is crushed, in this case, the control Even if the unit instructs to stop transmission, demodulation, and decoding of the test signal based on the detection of the ground communication device, the next Long message cannot be received within the remaining receivable contact distance. Therefore, the Long telegram 304 from the ground communication apparatus 102 is overlooked.

そこで本発明では，図１に示したように，Ｌｏｎｇ電文試験信号４０１は，アンテナ１１０を介して送信せず，試験信号送信経路１１１を用いて直接に復号回路１１５に入力することとしている。具体的には，制御部，受信部試験信号送信部は，一つのＦＰＧＡ（ｆｉｅｌｄ−ｐｒｏｇｒａｍｍａｂｌｅ ｇａｔｅ ａｒｒａｙ）にて構成されているため，地上通信装置１０２からの電文信号を検知するとＬｏｎｇ電文試験信号４０１の送信及びを復調，復号を即座に停止することが可能である。   Therefore, in the present invention, as shown in FIG. 1, the Long telegram test signal 401 is not transmitted via the antenna 110 but directly input to the decoding circuit 115 using the test signal transmission path 111. Specifically, since the control unit and the reception unit test signal transmission unit are configured by a single field-programmable gate array (FPGA), a Long telegram test signal 401 is detected when a telegram signal from the ground communication device 102 is detected. It is possible to immediately stop transmission, demodulation, and decoding of

このため，本実施例を適用した場合，電文信号と試験信号との衝突関係を示す図４では，図３の場合と同様に，Ｔｓｈｏｒｔ ＋ Ｔｌｏｎｇ≦Ｔが成り立つ場合において，Ｌｏｎｇ電文試験信号４０１送信時に地上通信装置１０２からの電文信号と衝突した場合の移動距離をＴＣ４０２とすると，ＴＣ≪Ｔｓｈｏｒｔとすることができ，高速走行時において試験信号Ｌｏｎｇ電文４０１を送信時に地上通信装置１０２からのＬｏｎｇ電文信号３０４と衝突しても，繰り返し送られてくるＬｏｎｇ電文信号３０４を受信することができる。結果的に，自己診断時に地上通信装置１０２からの電文信号を見落とすことなく車上通信装置１０１本体の高信頼性を保つことができるのである。 Therefore, in the case where this embodiment is applied, in FIG. 4 showing the collision relationship between the telegram signal and the test signal, as in the case of FIG. 3, the long telegram test signal is satisfied when T short + T long ≦ T holds. 401 when the moving distance when colliding with message signal from the ground communication devices 102 and TC402 during transmission, can be TC«T short, the test signal Long message 401 from the ground communication device 102 at the time of transmission at the high speed running Even if it collides with the long telegram signal 304, the long telegram signal 304 sent repeatedly can be received. As a result, it is possible to maintain the high reliability of the on-board communication device 101 without overlooking the telegram signal from the ground communication device 102 during self-diagnosis.

なお，移動体走行中の地上通信装置１０２からの電文信号と試験信号との衝突を回避するためには，移動体において，地上通信装置の設置場所を予め記憶しておき，地上通信装置の近辺では，試験信号を送信しないといった方法も考えられる。しかし，移動体の走行距離が長い場合や自在な走行を許容する場合には，全ての地上通信装置の位置情報を記憶して対応することは難しく，しかも，地上通信装置の設置場所を常に固定し，移設することができないといった問題が生じる。このため，本発明のように，地上通信装置からの電文信号を検知した際に，試験信号の復号やその後の試験信号の発信を即座に中止し，地上通信装置からの電文信号復調・復号を速やかに開始できることは，極めて有用で，適用可能性の幅広い技術であるといえる。   In order to avoid the collision between the telegram signal from the ground communication device 102 and the test signal while the mobile body is traveling, the location of the ground communication device is stored in advance in the mobile body, and the vicinity of the ground communication device is Then, a method of not transmitting a test signal is also conceivable. However, it is difficult to store and respond to the location information of all terrestrial communication devices when the moving distance of the moving object is long or when it is allowed to travel freely, and the installation location of the terrestrial communication device is always fixed. However, there arises a problem that it cannot be relocated. For this reason, as in the present invention, when the telegram signal from the ground communication device is detected, the decoding of the test signal and the subsequent transmission of the test signal are stopped immediately, and the telegram signal demodulation / decoding from the ground communication device is stopped. Being able to get started quickly is a very useful and widely applicable technology.

（実施例２）
次に図５，図６を用いて本発明の第２の実施例について説明する。本実施例では，車上通信装置１０１の受信部１０６において，地上通信装置１０２から受信検知強度を超える電文信号を受信したにもかかわらず，動作しない場合や検知する必要のない受信検知強度に満たない電文信号を誤って検知するといった故障検知を行う場合に適用したものである。 (Example 2)
Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the receiving unit 106 of the on-board communication device 101 satisfies the reception detection strength that does not need to be detected or does not need to be detected even though a telegram signal exceeding the reception detection strength is received from the ground communication device 102. This is applied to the case where failure detection such as erroneous detection of no telegram signal is performed.

本実施例では，図５に示すように受信部１０６は，地上通信装置１０２より受信した電文信号の受信強度を検出する受信強度検出回路５０１や，地上通信装置検知判定部５０２，受信した電文信号を復調する復調回路５０３，復調された信号から電文情報を復号する復号回路５０４等を有する。
図５に示す受信部１０６のうち，受信強度検出回路５０１または地上通信装置検知判定部５０２が異常の場合は，地上通信装置１０２からの所定の受信強度の電文信号を受信したにも関わらず，一連の受信部１０６の機能が動作しない可能性がある。そして，その結果，地上通信装置１０２を見逃すこととなる。 In this embodiment, as shown in FIG. 5, the receiving unit 106 includes a reception strength detection circuit 501 that detects the reception strength of a telegram signal received from the ground communication device 102, a ground communication device detection determination unit 502, and a received telegram signal. A demodulation circuit 504 for demodulating the message, a decoding circuit 504 for decoding the message information from the demodulated signal, and the like.
When the reception strength detection circuit 501 or the ground communication device detection determination unit 502 is abnormal in the reception unit 106 illustrated in FIG. 5, the telegram signal having a predetermined reception strength is received from the ground communication device 102. There is a possibility that the functions of the series of receiving units 106 do not operate. As a result, the ground communication device 102 is missed.

逆に，所定の受信強度以下の電文を受信して，一連の受信部１０６の機能を動作させてしまう場合は，受信すべきでない地上通信装置からの電文を誤って検出している可能性や，地上通信装置１０２が存在しないにもかかわらず，地上通信装置１０２が存在したと制御部１０３において処理してしまう虞がある。   On the other hand, when a message having a predetermined reception strength or less is received and the functions of the series of receiving units 106 are operated, there is a possibility that a message from a ground communication device that should not be received is erroneously detected. Even if the ground communication device 102 does not exist, if the ground communication device 102 exists, the control unit 103 may perform processing.

このような異常は，図６，図７に示すように，試験信号送信処理において，送信する試験信号波の出力強度を，地上通信装置検出を行う最低受信強度以上に設定したテストと，最低受信強度未満に設定したテストを行うことにより検出できる。すなわち，最低受信強度以上に設定した試験信号波６０１を受信できなかったり，最低受信強度未満に設定した試験信号波６０３を受信できたりした場合は，受信強度検出回路５０１または地上通信装置検出判定部５０２が故障していると判断できる。   As shown in FIGS. 6 and 7, such an abnormality is caused by a test in which the output intensity of the test signal wave to be transmitted is set to be equal to or higher than the minimum reception intensity for detecting the ground communication device in the test signal transmission process, It can be detected by performing a test set to less than the intensity. That is, if the test signal wave 601 set to the minimum reception strength or higher cannot be received or the test signal wave 603 set to a value lower than the minimum reception strength can be received, the reception strength detection circuit 501 or the ground communication device detection determination unit It can be determined that 502 is out of order.

受信強度検出回路５０１または地上通信装置検出判定部５０２の診断は，基本的には，試験信号生成回路１０９から試験信号送信アンテナ１１０を経て送信されるＳｈｏｒｔ電文の信号強度を変えることにより行う。
最低受信強度以上に設定した試験信号波６０１を用いてＳｈｏｒｔ電文の信号を送信した場合は，実施例１で行っていることと略同様であり，制御部において指示した試験信号と同内容の信号が受信部１０６で検知されたことを制御部１０３が確認できれば，受信強度検出回路５０１または地上通信装置検知判定部５０２には問題が無いと判断する。
次に，最低受信強度未満に設定した試験信号波６０３を用いてＳｈｏｒｔ電文の信号を送信した場合は，制御部において指示した試験信号と同内容の信号が受信部１０６で検知されなかったことを制御部１０３が確認できれば，受信強度検出回路５０１または地上通信装置検知判定部５０２には問題が無いと判断し，同内容の信号が受信部１０６で検知されたことを制御部１０３が確認した場合には，受信強度検出回路５０１または地上通信装置検知判定部５０２に問題があると判断する。
いずれの場合であっても，試験信号としてＬｏｎｇ電文を用いた場合には，Ｌｏｎｇ電文は試験信号送信経路１１１を用いて直接に復号回路１１５に入力するので，地上通信装置検知判定部５０２において，地上通信装置１０２からの電文信号を検知すると，Ｌｏｎｇ電文試験信号４０１の送信及びを復調，復号を即座に停止することが可能となっている。このため，試験信号Ｌｏｎｇ電文４０１の送信時に地上通信装置１０２からのＬｏｎｇ電文信号３０４と衝突しても，繰り返し送られてくるＬｏｎｇ電文信号３０４を受信することができ，結果的に，自己診断時に地上通信装置１０２からの電文信号を見落とすことなく車上通信装置１０１本体の高信頼性を保つことができる。 The diagnosis of the reception strength detection circuit 501 or the ground communication device detection determination unit 502 is basically performed by changing the signal strength of the Short telegram transmitted from the test signal generation circuit 109 via the test signal transmission antenna 110.
When the short telegram signal is transmitted using the test signal wave 601 set to be equal to or higher than the minimum reception intensity, it is substantially the same as that in the first embodiment, and a signal having the same content as the test signal instructed by the control unit. If the control unit 103 can confirm that the signal is detected by the reception unit 106, it is determined that there is no problem in the reception intensity detection circuit 501 or the ground communication device detection determination unit 502.
Next, when the short telegram signal is transmitted using the test signal wave 603 set to be less than the minimum reception intensity, it is confirmed that the signal having the same content as the test signal instructed by the control unit is not detected by the receiving unit 106. If the control unit 103 can confirm, it is determined that there is no problem in the reception intensity detection circuit 501 or the ground communication device detection determination unit 502, and the control unit 103 confirms that the signal having the same content is detected by the reception unit 106. Therefore, it is determined that there is a problem in the reception intensity detection circuit 501 or the ground communication device detection determination unit 502.
In any case, when a Long telegram is used as a test signal, the Long telegram is directly input to the decoding circuit 115 using the test signal transmission path 111. Therefore, in the ground communication device detection determination unit 502, When a telegram signal from the ground communication device 102 is detected, it is possible to immediately stop transmission and demodulation and decoding of the Long telegram test signal 401. Therefore, even when the test signal Long telegram 401 is transmitted, even if it collides with the Long telegram signal 304 from the ground communication device 102, the Long telegram signal 304 that is repeatedly transmitted can be received. High reliability of the on-board communication device 101 main body can be maintained without overlooking the telegram signal from the ground communication device 102.

（実施例３）
次に図８を用いて本発明の第３の実施例について説明する。本実施例では，地上通信装置１０２からの受信電文を復号し，復号した電文信号を一時格納するバッファレジスタ７０１の固定故障の検出を行う。
図８に示すように受信部１０６は，復号回路５０４の出力段に復号した地上通信装置１０２の電文を一時格納するバッファレジスタ７０１を備えることがある。本バッファレジスタ７０１に正常な地上通信装置１０２の電文データが格納された状態で固定故障（書き込み不可だが読み出しは可能）が発生した場合，制御部１０３は，電文データが正しく書き換えられていないにもかかわらず，正常な地上通信装置１０２の電文を切り出せたものとして，処理を行ってしまう。そこで，バッファレジスタ７０１の固定故障を検出するために，車上通信装置１０１の受信部１０６の診断においてＬｏｎｇ電文およびＳｈｏｒｔ電文のそれぞれについて，内容の異なる試験電文を複数用意する。そして，Ｌｏｎｇ電文については，アンテナ１１０を介さずに，試験信号送信経路１１１を通じて，順次，内容の異なる試験電文を，復号回路５０４に送信する。制御部１０３において，試験信号生成回路から送信された，それぞれの電文が確認されれば，バッファレジスタ７０１が正常であると判断し，そうでない場合には，バッファレジスタ７０１に固定故障があると判断する。 (Example 3)
Next, a third embodiment of the present invention will be described with reference to FIG. In the present embodiment, a received message from the ground communication device 102 is decoded, and a fixed failure of the buffer register 701 that temporarily stores the decoded message signal is detected.
As illustrated in FIG. 8, the receiving unit 106 may include a buffer register 701 that temporarily stores the decrypted message of the ground communication device 102 at the output stage of the decryption circuit 504. When a fixed failure (write is impossible but read is possible) occurs while the message data of the normal ground communication device 102 is stored in the buffer register 701, the control unit 103 does not rewrite the message data correctly. Regardless, the processing is performed assuming that the message of the normal ground communication device 102 can be extracted. Therefore, in order to detect a fixed failure in the buffer register 701, a plurality of test messages having different contents are prepared for each of the Long message and the Short message in the diagnosis of the receiving unit 106 of the on-board communication device 101. As for the Long message, test messages having different contents are sequentially transmitted to the decryption circuit 504 through the test signal transmission path 111 without passing through the antenna 110. The control unit 103 determines that the buffer register 701 is normal if each message transmitted from the test signal generation circuit is confirmed, and otherwise determines that the buffer register 701 has a fixed failure. To do.

Ｓｈｏｒｔ電文についても，略同様に，アンテナ１１０を介して，順次，内容の異なる試験電文を，車上受信アンテナ１０７に送信する。制御部１０３において，試験信号生成回路から送信された，それぞれの電文が確認されれば，バッファレジスタ７０１が正常であると判断し，そうでない場合には，バッファレジスタ７０１に固定故障があると判断する。   For the Short message, in a similar manner, test messages having different contents are sequentially transmitted to the on-vehicle reception antenna 107 via the antenna 110. The control unit 103 determines that the buffer register 701 is normal if each message transmitted from the test signal generation circuit is confirmed, and otherwise determines that the buffer register 701 has a fixed failure. To do.

また，上記の例では，Ｌｏｎｇ電文およびＳｈｏｒｔ電文の異なる試験電文を，それぞれ連続して送信する手順で説明したが，バッファレジスタ７０１が一つの電文しか記憶できない場合には，Ｌｏｎｇ電文およびＳｈｏｒｔ電文を交互に送信して，バッファレジスタ７０１の固定故障の有無を確認することが可能である。   Further, in the above example, the procedure for continuously transmitting different test messages of the Long message and the Short message has been described. However, when the buffer register 701 can store only one message, the Long message and the Short message are stored. It is possible to check whether or not there is a fixed failure of the buffer register 701 by transmitting alternately.

いずれの場合であっても，実施例２の場合と同様，試験信号としてＬｏｎｇ電文を用いた場合には，Ｌｏｎｇ電文は試験信号送信経路１１１を用いて直接に復号回路１１５に入力するので，地上通信装置検知判定部５０２において，地上通信装置１０２からの電文信号を検知すると，Ｌｏｎｇ電文試験信号４０１の送信及びを復調，復号を即座に停止することが可能となっている。このため，試験信号Ｌｏｎｇ電文４０１の送信時に地上通信装置１０２からのＬｏｎｇ電文信号３０４と衝突しても，繰り返し送られてくるＬｏｎｇ電文信号３０４を受信することができ，結果的に，自己診断時に地上通信装置１０２からの電文信号を見落とすことなく車上通信装置１０１本体の高信頼性を保つことができる。   In any case, as in the case of the second embodiment, when a Long message is used as a test signal, the Long message is directly input to the decoding circuit 115 using the test signal transmission path 111. When the communication device detection determination unit 502 detects a message signal from the ground communication device 102, it is possible to immediately stop transmission and demodulation and decoding of the Long message test signal 401. Therefore, even when the test signal Long telegram 401 is transmitted, even if it collides with the Long telegram signal 304 from the ground communication device 102, the Long telegram signal 304 that is repeatedly transmitted can be received. High reliability of the on-board communication device 101 main body can be maintained without overlooking the telegram signal from the ground communication device 102.

なお，本発明は上記した実施例１，２，３に限定されるものではなく，様々な変形例が含まれる。また，ある実施例の構成の一部を他の実施例構成に置き換えることも可能である。更に，上記した実施例は本発明を分かりやすく説明するために記載したものであり，必ずしも説明した全ての構成を備えるものに限定されるものではない。
例えば，電文の種類や受信部の構成などは，使用する目的や用途に応じて適宜変更しうるものである。また，車上通信装置及び地上通信装置のその他の構成は移動体の種類や大きさ等により様々な変形例が含まれうることは当然である。
さらに，本発明は車上通信装置が電力波を地上通信装置に向けて電力波を出力するものとして説明したが，これとは逆に，地上通信装置から移動体通信装置に電力波によって無線給電を行うものにも適用できることも当然である。
また，図面に記載されている信号線や情報線は説明上必要と考えられるものを示しており，製品上必ずしも全ての信号線や情報線を示しているとは限らない。実際には，殆ど全ての構成が相互に接続されていると考えてもよい。 The present invention is not limited to the first, second, and third embodiments described above, and includes various modifications. It is also possible to replace a part of the configuration of one embodiment with the configuration of another embodiment. Further, the above-described embodiments are described for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
For example, the type of message and the configuration of the receiving unit can be changed as appropriate according to the purpose and application of use. In addition, the other configurations of the on-board communication device and the ground communication device can naturally include various modifications depending on the type and size of the moving body.
Furthermore, although the present invention has been described on the assumption that the on-board communication device outputs the power wave to the ground communication device, conversely, the ground communication device wirelessly feeds the mobile communication device by the power wave. Of course, it can also be applied to those performing the above.
In addition, signal lines and information lines described in the drawings are those that are considered necessary for the explanation, and not all signal lines and information lines in the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

１０１ 車上通信装置
１０２ 地上通信装置
１０３ 制御部
１０４ 電力波送信部
１０５ 電力波送信アンテナ
１０６ 受信部
１０７ 車上受信アンテナ
１０８ 試験信号送信部
１０９ 試験信号生成回路
１１０ 試験信号送信アンテナ
１１１ 試験信号送信経路
１１２ 受信強度検出回路
１１３ 地上通信装置検知判定部
１１４ 復調回路
１１５ 復号回路
１１６ 試験信号送信通知回路
３０１ 試験信号Ｓｈｏｒｔ電文
３０２ 試験信号Ｌｏｎｇ電文
３０３ Ｓｈｏｒｔ電文信号
３０４ Ｌｏｎｇ電文信号
３０５ コンタクト距離
３０６ Ｌｏｎｇ電文受信移動距離
３０７ Ｓｈｏｒｔ電文受信移動距離
３０８ 電文受信余裕移動距離
４０１ 試験信号Ｌｏｎｇ電文
４０２ 地上通信装置との電文衝突移動距離
５０１ 受信強度検出回路
５０２ 地上通信装置検知判定部
５０３ 復調回路
５０４ 復号回路
５０５ Ｌｏｎｇ電文復号回路
５０６ Ｓｈｏｒｔ電文復号回路
６０１ 検出閾値以上の試験信号波受信強度
６０２ 地上通信装置検出閾値
６０３ 検出閾値未満の試験信号波受信強度
７０１ バッファレジスタ 101 On-vehicle communication device 102 Ground communication device 103 Control unit 104 Power wave transmission unit 105 Power wave transmission antenna 106 Reception unit 107 On-vehicle reception antenna 108 Test signal transmission unit 109 Test signal generation circuit 110 Test signal transmission antenna 111 Test signal transmission path 112 Reception strength detection circuit 113 Ground communication device detection determination unit 114 Demodulation circuit 115 Decoding circuit 116 Test signal transmission notification circuit 301 Test signal Short message 302 Test signal Long message 303 Short message signal 304 Long message signal 305 Contact distance 306 Long message reception movement Distance 307 Short message reception movement distance 308 Message reception margin movement distance 401 Test signal Long message 402 Message collision movement distance 501 with ground communication device Reception strength detection circuit 502 Ground communication device detection determination unit 503 Regulating circuit 504 decoding circuit 505 Long message decoder 506 Short message decoder 601 detects a threshold or more test signal wave reception intensity 602 ground communication device below the detection threshold 603 detection threshold test signal wave reception intensity 701 buffer register

Claims (3)

移動体上に設けられ，地上通信装置から送信された電文信号を車上受信アンテナで受信し，
該車上受信アンテナで受信した前記電文信号を復調回路，復号回路で処理する車上通信装置であって，
試験信号を生成する試験信号生成回路，試験信号送信アンテナ，及び前記地上通信装置の検知判定を行なう地上通信装置検知判定部を有し，
前記試験信号生成回路で生成された複数種類の試験信号の内，Ｌｏｎｇ電文信号は，前記試験信号生成回路から試験信号送信経路を経由して前記復号回路に入力されるように構成し，
前記試験信号生成回路で生成された複数種類の試験信号の内，ｓｈｏｒｔ電文信号は，前記試験信号生成回路から前記試験信号送信アンテナ，前記車上受信アンテナを経由して前記復調回路に入力されるように構成し，
前記地上通信装置検知判定部において，前記地上通信装置から送信された信号を検知した際には，前記試験信号の復調，復号，送信処理を停止するように構成した車上通信装置。 A telegram signal sent from a ground communication device is received on the vehicle, and is received on the vehicle.
An on-vehicle communication device for processing the telegram signal received by the on-vehicle receiving antenna by a demodulation circuit and a decoding circuit,
A test signal generation circuit that generates a test signal, a test signal transmission antenna, and a ground communication device detection determination unit that performs detection determination of the ground communication device;
Among a plurality of types of test signals generated by the test signal generation circuit, a Long telegram signal is configured to be input from the test signal generation circuit to the decoding circuit via a test signal transmission path,
Of the plural types of test signals generated by the test signal generation circuit, a short telegram signal is input from the test signal generation circuit to the demodulation circuit via the test signal transmission antenna and the on-vehicle reception antenna. Configured as
An on-vehicle communication device configured to stop demodulation, decoding, and transmission processing of the test signal when the ground communication device detection determination unit detects a signal transmitted from the ground communication device. 請求項１に記載の車上通信装置において，
前記車上通信装置は，前記地上通信装置から送られる電文信号の受信強度を検出する受信強度検出回路を備え，
前記試験信号生成回路によって生成された，前記電文信号の検出受信強度閾値以上の試験信号及び前記閾値未満の試験信号の両方を，前記受信強度検出回路及び前記地上通信装置検知判定部に送信することによって，該受信強度検出回路及び該地上通信装置検知判定部の正常性をチェックすることのできる制御部を備えたことを特徴とする車上通信装置。 The on-vehicle communication device according to claim 1,
The on-vehicle communication device includes a reception strength detection circuit that detects a reception strength of a telegram signal transmitted from the ground communication device,
Transmitting both the test signal generated by the test signal generation circuit that is equal to or greater than the detection reception intensity threshold of the telegram signal and the test signal that is less than the threshold to the reception intensity detection circuit and the ground communication device detection determination unit; The on-vehicle communication device comprising a control unit capable of checking the normality of the reception intensity detection circuit and the ground communication device detection determination unit. 請求項１または２に記載の車上通信装置において，
前記試験信号生成回路は，電文長の種類毎に内容の異なる複数の前記試験信号を生成し，該内容の異なる複数の試験信号を送信して，前記車上通信装置に設けられたバッファレジスタに格納し，前記試験信号生成回路から送信されたそれぞれの電文を確認することにより，前記バッファレジスタの正常性をチェックすることのできる制御部を備えたことを特徴とする車上通信装置。 The on-vehicle communication device according to claim 1 or 2,
The test signal generation circuit generates a plurality of test signals having different contents for each type of message length, and transmits the plurality of test signals having different contents to a buffer register provided in the on-board communication device. An on-vehicle communication device comprising a control unit that can store and check the normality of the buffer register by checking each telegram transmitted from the test signal generation circuit .
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