JP2001077768A - Transmitter - Google Patents
TransmitterInfo
- Publication number
- JP2001077768A JP2001077768A JP25458599A JP25458599A JP2001077768A JP 2001077768 A JP2001077768 A JP 2001077768A JP 25458599 A JP25458599 A JP 25458599A JP 25458599 A JP25458599 A JP 25458599A JP 2001077768 A JP2001077768 A JP 2001077768A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- signal
- modulation
- unit
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Train Traffic Observation, Control, And Security (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、例えば鉄道保安
装置等において各種情報を含む信号を送信する送信装
置、特に故障検知の容易化に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission device for transmitting a signal including various information in, for example, a railway security device, and more particularly to facilitating failure detection.
【０００２】[0002]
【従来の技術】例えば鉄道保安装置等の送信装置におい
てはマイクロエレクトロニクス技術の導入や多情報化に
ともないＡ／Ｄ変換器やマイクロプロセッサ等を使用し
たデジタル回路を使用することが多くなっている。この
デジタル回路を使用した送信装置の故障を確実に検出す
るため、送信装置をＡ系とＢ系のように２重系構成にし
て、２つの系で出力する信号を比較し、２つの系で出力
する信号が一致しているときに正常と判定し、不一致の
ときに故障と判定している。2. Description of the Related Art For example, in a transmission device such as a railway security device, a digital circuit using an A / D converter, a microprocessor, or the like is often used with the introduction of microelectronic technology and the increase in information. In order to reliably detect a failure in a transmission device using this digital circuit, the transmission device is configured as a double system such as an A system and a B system, and signals output from the two systems are compared. If the output signals match, it is determined to be normal, and if they do not match, it is determined to be faulty.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら送信装置
を２重系構成にするとＡ／Ｄ変換器やマイクロプロセッ
サ等が各系毎に必要になり、送信装置が高価になるとと
もに装置が大型化してしまうという短所がある。However, if the transmitting apparatus is configured in a dual system, an A / D converter, a microprocessor and the like are required for each system, so that the transmitting apparatus becomes expensive and the apparatus becomes large. There is a disadvantage.
【０００４】この発明はかかる短所を改善し、簡単な構
成で確実に故障を検出することができる送信装置を提供
することを目的とするものである。[0004] It is an object of the present invention to improve such disadvantages and to provide a transmission device capable of reliably detecting a failure with a simple configuration.
【０００５】[0005]
【課題を解決するための手段】この発明に係る送信装置
は、変調信号発生部と送信部と故障検知部を有し、変調
信号発生部は一定周期毎に異なる変調周波数の変調波を
発生し、送信部は変調信号発生部で発生した変調波で搬
送波を変調して送信信号を生成して送信し、故障検知部
は送信している送信信号を復調し、復調信号の周波数と
変調信号発生部から出力している一定周期毎に異なる変
調周波数とを比較し、復調信号の周波数と変調周波数が
一致しているときは、送信部が正常に動作していること
を示す正常信号を出力し、復調信号の周波数と変調周波
数が一致していないときは送信部に故障が生じているこ
とを示す故障信号を出力することを特徴とする。A transmitting apparatus according to the present invention has a modulated signal generating section, a transmitting section, and a failure detecting section, and the modulated signal generating section generates a modulated wave having a different modulation frequency at regular intervals. The transmission unit modulates the carrier with the modulation wave generated by the modulation signal generation unit to generate and transmit a transmission signal, and the failure detection unit demodulates the transmission signal being transmitted, and sets the frequency of the demodulated signal and the modulation signal generation. The demodulated signal is compared with a different modulation frequency for each fixed period, and when the frequency of the demodulated signal matches the modulation frequency, a normal signal indicating that the transmitter is operating normally is output. When the frequency of the demodulated signal and the modulation frequency do not match, a failure signal indicating that a failure has occurred in the transmission unit is output.
【０００６】[0006]
【発明の実施の形態】この発明の送信装置は、変調信号
発生部と送信部と故障検知部を有し、変調信号発生部は
変調周波数を発生するものであり、タイマと周波数決定
部と周波数発生部を有する。タイマはあらかじめ設定さ
れた一定周期毎にタイミング信号を出力し、周波数決定
部はタイマが出力するタイミング信号毎に周波数の切換
え決定信号を出力する。周波数発生部はあらかじめ設定
された複数の変調周波数の変調波を発生するものであ
り、周波数決定部から周波数の切換え決定信号が入力す
るとそれまで出力していた変調周波数と異なる変調周波
数の変調波に切り換えて出力する。送信部は搬送波を変
調信号発生部から送られる変調波で変調して送信信号を
生成して送信するものであり、変調部と送信信号出力部
を有する。変調部は搬送波を変調信号発生部の周波数発
生部から一定周期毎に周波数を切り換えて出力する変調
波で変調し送信信号を生成し、送信信号出力部は生成し
た送信信号を外部に送信する。故障検知部は送信部が正
常に動作しているか故障が生じたかを判定するものであ
り、復調部と比較部を有する。復調部は送信部から送信
する送信信号を入力して復調し、比較部は入力した復調
信号と変調信号発生部で出力する変調波を比較し、復調
信号の周波数と変調周波数が一致しているときは、送信
部が正常に動作していることを示す正常信号を出力し、
復調信号の周波数と変調周波数が一致していないときは
送信部に故障が生じていることを示す故障信号を出力す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A transmitting apparatus according to the present invention has a modulation signal generator, a transmitter, and a failure detector. The modulation signal generator generates a modulation frequency. It has a generator. The timer outputs a timing signal for each predetermined period, and the frequency determination unit outputs a frequency switching determination signal for each timing signal output by the timer. The frequency generation unit generates a modulation wave of a plurality of modulation frequencies set in advance.When a frequency switching determination signal is input from the frequency determination unit, the frequency generation unit generates a modulation wave of a modulation frequency different from the modulation frequency output up to that time. Switch and output. The transmission unit modulates a carrier with a modulation wave transmitted from a modulation signal generation unit to generate and transmit a transmission signal, and includes a modulation unit and a transmission signal output unit. The modulation unit modulates the carrier with a modulation wave output by switching the frequency from the frequency generation unit of the modulation signal generation unit at regular intervals and generates a transmission signal, and the transmission signal output unit transmits the generated transmission signal to the outside. The failure detection unit determines whether the transmission unit is operating normally or a failure has occurred, and includes a demodulation unit and a comparison unit. The demodulation unit inputs and demodulates the transmission signal transmitted from the transmission unit, and the comparison unit compares the input demodulation signal with the modulation wave output from the modulation signal generation unit, and the frequency of the demodulation signal matches the modulation frequency. Output a normal signal indicating that the transmitter is operating normally,
When the frequency of the demodulated signal and the modulation frequency do not match, a failure signal indicating that a failure has occurred in the transmission unit is output.
【０００７】[0007]
【実施例】図１はこの発明の一実施例の構成を示すブロ
ック図である。図に示すように、送信装置は変調信号発
生部１と送信部２と故障検知部３を有する。変調信号発
生部１は変調周波数を発生するものであり、タイマ４と
周波数決定部５と周波数発生部６を有する。タイマ４は
あらかじめ設定された一定周期毎にタイミング信号を周
波数決定部５に出力する。周波数決定部５はタイマ４が
出力するタイミング信号毎に周波数発生部６に周波数の
切換え決定信号を出力する。周波数発生部６はあらかじ
め設定された複数の変調周波数の変調波を発生するもの
であり、周波数決定部５から周波数の切換え決定信号が
入力するとそれまで出力していた変調周波数と異なる変
調周波数の変調波に切り換えて出力する。FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. As shown in the figure, the transmission device has a modulation signal generator 1, a transmitter 2, and a failure detector 3. The modulation signal generation unit 1 generates a modulation frequency, and includes a timer 4, a frequency determination unit 5, and a frequency generation unit 6. The timer 4 outputs a timing signal to the frequency determination unit 5 at predetermined fixed periods. The frequency determination unit 5 outputs a frequency switching determination signal to the frequency generation unit 6 for each timing signal output by the timer 4. The frequency generation unit 6 generates a modulation wave of a plurality of modulation frequencies set in advance, and when a frequency switching determination signal is input from the frequency determination unit 5, a modulation frequency different from the modulation frequency output up to that time is modulated. Switch to wave and output.
【０００８】送信部２は搬送波を変調信号発生部１から
送られる変調波で変調して送信信号を生成して送信する
ものであり、変調部７と送信信号出力部８を有する。変
調部７は搬送波を変調信号発生部１の周波数発生部６か
ら一定周期毎に周波数を切り換えて出力する変調波で変
調し送信信号を生成し送信信号出力部８に出力する。送
信信号出力部８は変調部７で生成した送信信号を外部に
送信する。The transmission section 2 modulates a carrier with a modulation wave sent from the modulation signal generation section 1 to generate and transmit a transmission signal, and has a modulation section 7 and a transmission signal output section 8. The modulating unit 7 modulates the carrier with a modulating wave outputted by switching the frequency from the frequency generating unit 6 of the modulating signal generating unit 1 at regular intervals, generates a transmission signal, and outputs the transmission signal to the transmission signal output unit 8. The transmission signal output unit 8 transmits the transmission signal generated by the modulation unit 7 to the outside.
【０００９】故障検知部３は送信部２が正常に動作して
いるか故障が生じたかを判定するものであり、復調部９
と比較部１０と判定結果出力部１１を有する。復調部９
は送信信号出力部８から送信する送信信号を入力して復
調し、復調信号を比較部１０に出力する。比較部１０は
入力した復調信号と周波数発生部６で出力する変調波を
比較し、復調信号の周波数と変調周波数が一致している
か否を判定し、復調信号の周波数と変調周波数が一致し
ているときは、送信部２が正常に動作していることを示
す正常信号を判定結果出力部１１に出力し、復調信号の
周波数と変調周波数が一致していないときは送信部２に
故障が生じていることを示す故障信号を判定結果出力部
１１に出力する。判定結果出力部１１は判定結果を表示
部や警報装置等に出力する。The failure detection unit 3 determines whether the transmission unit 2 is operating normally or a failure has occurred.
And a comparison unit 10 and a determination result output unit 11. Demodulation unit 9
Receives a transmission signal to be transmitted from the transmission signal output unit 8, demodulates the signal, and outputs the demodulated signal to the comparison unit 10. The comparing unit 10 compares the input demodulated signal with the modulated wave output by the frequency generating unit 6, determines whether the frequency of the demodulated signal matches the modulation frequency, and determines whether the frequency of the demodulated signal matches the modulation frequency. Output, a normal signal indicating that the transmission unit 2 is operating normally is output to the determination result output unit 11. If the frequency of the demodulated signal does not match the modulation frequency, a failure occurs in the transmission unit 2. Is output to the determination result output unit 11. The determination result output unit 11 outputs the determination result to a display unit, an alarm device, or the like.
【００１０】上記のように構成した送信装置で送信部２
から送信信号を送り出しているときに、送信部２が正常
に動作しているか否を故障検知部３で監視しているとき
の動作を図２のタイムチャートを参照して説明する。[0010] In the transmitting apparatus configured as described above, the transmitting unit 2
The operation when the failure detection unit 3 monitors whether the transmission unit 2 is operating normally when the transmission signal is transmitted from is described with reference to the time chart of FIG.
【００１１】変調信号発生部１のタイマ４はあらかじめ
設定された一定周期Ｔ毎にタイミング信号を発生して周
波数決定部５に送る。周波数決定部５は送られたタイミ
ング信号毎に周波数の切換え決定信号を発生して周波数
発生部６に送る。周波数発生部６にはあらかじめ異なる
変調周波数、例えば２種類の変調周波数ｆ1，ｆ2が設定
され、周波数決定部５から周波数の切換え決定信号が入
力するたびに変調周波数ｆ1の変調波と変調周波数ｆ2の
変調波を切り換えて出力する。送信部２の変調部７は周
波数発生部６から一定タイミングＴ毎に切り換えて出力
する変調周波数ｆ1の変調波と変調周波数ｆ2の変調波に
より搬送波の振幅を変調し送信信号を生成し送信信号出
力部８に送る。送信信号出力部８は送られた送信信号を
外部に送信する。このように送信信号を送信していると
きに、故障検知部３の復調部９は送信信号出力部８から
送信している送信信号を入力して復調し、復調信号を比
較部１０に出力する。比較部１０は復調部９から入力し
た復調信号と周波数発生部６で出力する変調波を各タイ
ミングＴ毎に比較し、復調信号の周波数と変調周波数が
一致しているか否を判定する。すなわち、復調信号の周
波数ｆ1が変調周波数ｆ1と一致しているとき及び復調信
号の周波数ｆ2が変調周波数ｆ2と一致しているときは送
信部２が正常に動作していると判定し、正常信号を判定
結果出力部１１に出力し、復調信号の周波数は変調周波
数と異なるときは送信部２に故障が生じていると判定
し、故障信号を判定結果出力部１１に出力する。The timer 4 of the modulation signal generator 1 generates a timing signal at a predetermined period T and sends it to the frequency determiner 5. The frequency determination unit 5 generates a frequency switching determination signal for each of the transmitted timing signals and sends the signal to the frequency generation unit 6. Different modulation frequencies, for example, two types of modulation frequencies f 1 and f 2 are set in the frequency generation unit 6 in advance, and each time a frequency switching determination signal is input from the frequency determination unit 5, a modulation wave of the modulation frequency f 1 and a modulation wave are modulated. by switching the modulated wave of the frequency f 2 to the output. Modulation unit 7 of the transmission unit 2 generates a transmission signal by modulating the amplitude of the carrier wave by the modulation wave of the modulation wave modulation frequency f 2 of the modulation frequency f 1 to be output is switched from the frequency generator 6 every predetermined timing T transmission The signal is sent to the signal output unit 8. The transmission signal output unit 8 transmits the transmitted transmission signal to the outside. When the transmission signal is being transmitted in this manner, the demodulation unit 9 of the failure detection unit 3 receives and demodulates the transmission signal transmitted from the transmission signal output unit 8 and outputs the demodulated signal to the comparison unit 10. . The comparing unit 10 compares the demodulated signal input from the demodulating unit 9 and the modulated wave output from the frequency generating unit 6 at each timing T, and determines whether or not the frequency of the demodulated signal matches the modulation frequency. That is, when the frequency f 1 of the demodulated signal matches the modulation frequency f 1 and when the frequency f 2 of the demodulated signal matches the modulation frequency f 2 , it is determined that the transmission unit 2 is operating normally. Then, a normal signal is output to the determination result output unit 11. If the frequency of the demodulated signal is different from the modulation frequency, it is determined that a failure has occurred in the transmission unit 2, and a failure signal is output to the determination result output unit 11.
【００１２】上記実施例は送信信号を振幅変調により生
成した場合について説明したが周波数変調で生成する場
合にも同様に適用することができる。The above embodiment has been described with respect to a case where a transmission signal is generated by amplitude modulation. However, the present invention can be similarly applied to a case where a transmission signal is generated by frequency modulation.
【００１３】[0013]
【発明の効果】この発明は以上説明したように送信信号
を生成する変調波の変調周波数を一定周期毎に異なら
せ、送信信号を復調した復調信号の周波数と一定周期毎
に異なる変調周波数を比較して送信部の故障の有無を判
定するようにしたから、簡単な構成で故障の有無を精度
良く検出することができる。As described above, according to the present invention, the modulation frequency of the modulation wave for generating the transmission signal is made different every fixed period, and the frequency of the demodulated signal obtained by demodulating the transmission signal is compared with the different modulation frequency every fixed period. Thus, the presence / absence of a failure in the transmission unit is determined, so that the presence / absence of a failure can be accurately detected with a simple configuration.
【００１４】また送信装置の故障の有無を検出するため
に送信装置を２重系にする必要がないからコストダウン
を図ることができる。Further, since it is not necessary to use a double transmission system for detecting the presence or absence of a failure in the transmission system, the cost can be reduced.
【図１】この発明の実施例の構成を示すブロック図であ
る。FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.
【図２】上記実施例の動作を示すタイムチャートであ
る。FIG. 2 is a time chart showing the operation of the embodiment.
１ 変調信号発生部 ２ 送信部 ３ 故障検知部 ４ タイマ ５ 周波数決定部 ６ 周波数発生部 ７ 変調部 ８ 送信信号出力部 ９ 復調部 １０ 比較部 １１ 判定結果出力部 DESCRIPTION OF SYMBOLS 1 Modulation signal generation part 2 Transmission part 3 Failure detection part 4 Timer 5 Frequency determination part 6 Frequency generation part 7 Modulation part 8 Transmission signal output part 9 Demodulation part 10 Comparison part 11 Judgment result output part
Claims (1)
有し、変調信号発生部は一定周期毎に異なる変調周波数
の変調波を発生し、送信部は変調信号発生部で発生した
変調波で搬送波を変調して送信信号を生成して送信し、
故障検知部は送信している送信信号を復調し、復調信号
の周波数と変調信号発生部から出力している一定周期毎
に異なる変調周波数とを比較し、復調信号の周波数と変
調周波数が一致しているときは、送信部が正常に動作し
ていることを示す正常信号を出力し、復調信号の周波数
と変調周波数が一致していないときは送信部に故障が生
じていることを示す故障信号を出力することを特徴とす
る送信装置。A modulation signal generation unit, a transmission unit, and a failure detection unit, wherein the modulation signal generation unit generates a modulation wave having a different modulation frequency at regular intervals, and the transmission unit generates a modulation wave generated by the modulation signal generation unit. Modulates a carrier with a wave to generate and transmit a transmission signal,
The failure detection unit demodulates the transmitted transmission signal, compares the frequency of the demodulated signal with a different modulation frequency output from the modulation signal generation unit at regular intervals, and determines whether the frequency of the demodulated signal matches the modulation frequency. Output a normal signal indicating that the transmitter is operating normally, and a failure signal indicating that a failure has occurred in the transmitter when the frequency of the demodulated signal and the modulation frequency do not match. A transmitting device for outputting the data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25458599A JP2001077768A (en) | 1999-09-08 | 1999-09-08 | Transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25458599A JP2001077768A (en) | 1999-09-08 | 1999-09-08 | Transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001077768A true JP2001077768A (en) | 2001-03-23 |
Family
ID=17267090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25458599A Pending JP2001077768A (en) | 1999-09-08 | 1999-09-08 | Transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001077768A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036649A (en) * | 2012-12-17 | 2013-04-10 | 上海应用技术学院 | High-speed train based fault early warning information heterogeneous reuse wireless transmission method |
| JP2014055800A (en) * | 2012-09-11 | 2014-03-27 | Mitsubishi Electric Corp | Merging unit |
-
1999
- 1999-09-08 JP JP25458599A patent/JP2001077768A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014055800A (en) * | 2012-09-11 | 2014-03-27 | Mitsubishi Electric Corp | Merging unit |
| CN103036649A (en) * | 2012-12-17 | 2013-04-10 | 上海应用技术学院 | High-speed train based fault early warning information heterogeneous reuse wireless transmission method |
| CN103036649B (en) * | 2012-12-17 | 2016-04-27 | 上海应用技术学院 | Based on the fault pre-alarming Information heterogeneity multiplex wireless transmission method of bullet train |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4864589A (en) | Spread spectrum power line communications | |
| JPH08288916A (en) | Monitor system for full optical reproduction repeater | |
| JP2001077768A (en) | Transmitter | |
| JP4976619B2 (en) | Ground receiving device for insulated track circuit and train control device | |
| JP4607777B2 (en) | Scanning train detection apparatus and scanning train detection method | |
| JP2001080513A (en) | Train detecting device | |
| KR920008410B1 (en) | Method and device watching safety for power wire | |
| JPS6181036A (en) | Centralized monitor system of gas leakage by power-line carrier | |
| JPS5880574A (en) | Ultrasonic obstacle detecting device | |
| KR0176613B1 (en) | Apparatus for communication for fault detecting change of transmission data | |
| JP3561798B2 (en) | Train presence detection system | |
| JP2661102B2 (en) | Data transmission equipment | |
| JP2735026B2 (en) | Abnormal operation prevention circuit of orthogonal frequency division multiplexing modulator | |
| KR950020349A (en) | Radio alarm processing device | |
| JPH05227096A (en) | Remote measuring system for optical repeater | |
| JPH04337936A (en) | Transmission/reception system | |
| CA1295393C (en) | Spread spectrum power line communications | |
| JPH0479434A (en) | Power break monitor system | |
| US20100052874A1 (en) | Open-loop monitoring system | |
| JP2008028666A (en) | Wireless communication device | |
| JPS6167339A (en) | Communication device for catv system | |
| JPS63283236A (en) | System for switching spare device | |
| JPH04266245A (en) | Terminal fault monitor system | |
| KR970019251A (en) | Data line monitoring system | |
| JP2001053658A (en) | Device for eliminating cross-polarized wave interference |