JPH0188537U - - Google Patents
Info
- Publication number
- JPH0188537U JPH0188537U JP18392987U JP18392987U JPH0188537U JP H0188537 U JPH0188537 U JP H0188537U JP 18392987 U JP18392987 U JP 18392987U JP 18392987 U JP18392987 U JP 18392987U JP H0188537 U JPH0188537 U JP H0188537U
- Authority
- JP
- Japan
- Prior art keywords
- direct current
- digital
- amplitude
- transmission line
- superimposed
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000008054 signal transmission Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
第１図は本考案の１実施例の構成を示すブロツ
ク図、第２図は第１図に示すデジタル／アナログ
変換器の入出力特性を示す特性図、第３図は第１
図に示す振幅制御回路の入出力特性を示す特性図
、第４図は第１図に示す実施例の効果を説明する
説明図、第５図は従来の第１の信号伝送装置の構
成を示すブロツク図、第６図は従来の第１の信号
伝送装置の構成を示すブロツク図である。
１０…送信器、１１…直流電源、１３…通信器
、１４，３４…伝送装置、１５…センサ、１７…
マイクロプロセツサ、１８…ランダムアクセスメ
モリ、１９…読出し専用メモリ、２１，２７，３
５…アナログ通信器、２２，２９…ユニバーサル
非同期送受信器、２３，２８，３６…変調復調回
路、２４，３０…デジタル通信器、２５…受信装
置、３１…制御器、３２…入力器、３３…表示器
、Ｃ２…検波回路、Ｃ３…振幅制御回路。
FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention, FIG. 2 is a characteristic diagram showing the input/output characteristics of the digital/analog converter shown in FIG. 1, and FIG.
4 is an explanatory diagram illustrating the effect of the embodiment shown in FIG. 1, and FIG. 5 is a diagram showing the configuration of a conventional first signal transmission device. Block Diagram FIG. 6 is a block diagram showing the configuration of a first conventional signal transmission device. 10... Transmitter, 11... DC power supply, 13... Communication device, 14, 34... Transmission device, 15... Sensor, 17...
Microprocessor, 18...Random access memory, 19...Read-only memory, 21, 27, 3
5... Analog communication device, 22, 29... Universal asynchronous transmitter/receiver, 23, 28, 36... Modulation/demodulation circuit, 24, 30... Digital communication device, 25... Receiving device, 31... Controller, 32... Input device, 33... Display device, C2 ...detection circuit, C3 ...amplitude control circuit.
Claims (1)
流に変換して伝送線の一端に送出するアナログ伝
送手段と、この直流電流を前記伝送線の他端を介
して受信するアナログ受信手段と、デジタル情報
により変調されたデジタル信号が前記直流電流に
重畳され前記伝送線を介して送受される一対のデ
ジタル通信手段とを有する信号伝送装置において
、一対の前記デジタル通信手段のうち少なくとも
一方は前記直流電流の大きさにより前記デジタル
信号の振幅を変更する振幅制御手段とこの振幅制
御手段の出力を前記デジタル情報で変調する変調
手段を具備することを特徴とする信号伝送装置。 analog transmission means that converts an electrical signal corresponding to a measured physical quantity into a direct current and sends it to one end of a transmission line; an analog reception means that receives this direct current via the other end of the transmission line; and digital information. and a pair of digital communication means in which a digital signal modulated by the direct current is superimposed on the direct current and transmitted and received via the transmission line, at least one of the pair of digital communication means is superimposed on the direct current. A signal transmission device comprising: amplitude control means for changing the amplitude of the digital signal depending on the amplitude; and modulation means for modulating the output of the amplitude control means with the digital information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18392987U JPH0641400Y2 (en) | 1987-12-02 | 1987-12-02 | Signal transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18392987U JPH0641400Y2 (en) | 1987-12-02 | 1987-12-02 | Signal transmission device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0188537U true JPH0188537U (en) | 1989-06-12 |
| JPH0641400Y2 JPH0641400Y2 (en) | 1994-10-26 |
Family
ID=31475329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18392987U Expired - Lifetime JPH0641400Y2 (en) | 1987-12-02 | 1987-12-02 | Signal transmission device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0641400Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018151915A (en) * | 2017-03-14 | 2018-09-27 | オムロン株式会社 | Electrical equipment and receiving equipment |
| JP2019012906A (en) * | 2017-06-29 | 2019-01-24 | オムロン株式会社 | Electrical equipment |
-
1987
- 1987-12-02 JP JP18392987U patent/JPH0641400Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018151915A (en) * | 2017-03-14 | 2018-09-27 | オムロン株式会社 | Electrical equipment and receiving equipment |
| JP2019012906A (en) * | 2017-06-29 | 2019-01-24 | オムロン株式会社 | Electrical equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0641400Y2 (en) | 1994-10-26 |
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