JPS60113545A - Two-line-type transmitter - Google Patents
Two-line-type transmitterInfo
- Publication number
- JPS60113545A JPS60113545A JP22133783A JP22133783A JPS60113545A JP S60113545 A JPS60113545 A JP S60113545A JP 22133783 A JP22133783 A JP 22133783A JP 22133783 A JP22133783 A JP 22133783A JP S60113545 A JPS60113545 A JP S60113545A
- Authority
- JP
- Japan
- Prior art keywords
- current
- voltage
- light
- load
- line
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
本発明は、伝送端１１１１１からの信号の伝送と、伝送
側で消費する電力の供給とを共通の２６伝送路を介して
行なう２線式伝送器に関するものである。[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a two-wire system that transmits signals from a transmission end 11111 and supplies power consumed on the transmission side via a common 26 transmission path. It is related to transmitters.
従来公知のこの種の伝送器として、例えば特公昭４９−
４２９５６号公報に記載されたものがある。As a conventionally known transmitter of this kind, for example,
There is one described in Japanese Patent No. 42956.
第１図は、この伝送器の構成ブロック図であって、負荷
りを流れる電流を調整する手段１と、伝送すべき信号ｅ
、を入力する電圧応答手段２と、負荷電施工、に応じた
電圧を提供する抵抗手段３と、この抵抗手段に発生する
電圧を電圧応答手段２に負帰還させるループ４とで構成
されている。FIG. 1 is a block diagram of the configuration of this transmitter, which includes means 1 for adjusting the current flowing through the load, and a signal e to be transmitted.
, a resistance means 3 that provides a voltage according to the load voltage, and a loop 4 that negatively feeds back the voltage generated in this resistance means to the voltage response means 2. .
この装置は、伝送すべき信号ｅｉに正確に対応し“ た
電ｊｌＵを負荷りに伝送できるという特徴があるが、２
線伝送路に抵抗手段５が接続される構成であるために、
ここでの電力消費（■Ｌ・１＜ｆ）が存在し、伝送端側
での電力消＊ｉヲを増大させるという問題点がある。具
体的には負荷電流が４〜２０ ｍＡである場合、抵抗手
段５の値は、通常５０〜２０００程度のものが使用芒れ
、ここでの最大消費電力は数Ｗ程度となる。This device has the feature that it can accurately correspond to the signal ei to be transmitted and transmit the electric power jlU to the load.
Since the configuration is such that the resistance means 5 is connected to the line transmission line,
There is power consumption (L.1<f) here, which poses a problem of increasing power consumption at the transmission end. Specifically, when the load current is 4 to 20 mA, the value of the resistance means 5 is usually about 50 to 2000, and the maximum power consumption here is about several watts.
ここにおいて、本発明は従来技術におけるこの様な問題
点に鑑みてなされたもので、伝送端側での消費電力を低
減することのできる２線式伝送器を実現しようとするも
のである。The present invention has been made in view of these problems in the prior art, and is intended to realize a two-wire transmitter that can reduce power consumption on the transmission end side.
本発明に係る装置は、負荷電流ＩＬが流れる２線伝送路
に順方向に発光ダイオードを接続するとともに、この発
光ダイオードからの光を受光するフォトタイオードを設
け、このフォトタイオードによってイＧられた信号を電
圧応答手段に負帰還させるようにした点に特徴かある。In the device according to the present invention, a light emitting diode is connected in the forward direction to a two-wire transmission line through which a load current IL flows, and a photodiode is provided to receive light from the light emitting diode. The feature is that the output signal is negatively fed back to the voltage response means.
第２図は本発明に係る装置の一例を示す結成ブロック図
である。この図において、Ｌは負荷、ＢＴは負荷りと直
列に接続された直流電源で、これらは受信側に設置され
ている。１は負荷りに流れる負荷電施工ゎを調整する電
流調整手段で、ここでは−２線伝送路ＬＮに挿入接続し
たトランジスタが用いられている。２は伝送ずべき信号
１ト、圧ｅが一方の入力端に印加される電圧応答手段で
、ここでは差動増ｌ１ｖＡ器が用いられている。この差
動増幅器は、２綜伝送路ＬＮを介して供給される直流電
源ＩＪＴからの電力によって作動する。なお、差動増幅
器２の電源端２１．２２に加わる電圧は、ツェナーダイ
オード２３及びこのツェナーダイオードに定電流を供給
する定電流回路２４によって定電圧に維持されている。FIG. 2 is a block diagram showing an example of a device according to the present invention. In this figure, L is a load, BT is a DC power supply connected in series with the load, and these are installed on the receiving side. Reference numeral 1 denotes a current adjusting means for adjusting the load current flowing to the load, and here a transistor inserted and connected to the -2 line transmission line LN is used. Reference numeral 2 denotes a voltage response means to which a signal to be transmitted and a pressure e are applied to one input terminal, and a differential amplifier is used here. This differential amplifier is operated by power from the DC power supply IJT supplied via the two-wire transmission line LN. Note that the voltage applied to the power supply terminals 21 and 22 of the differential amplifier 2 is maintained at a constant voltage by a Zener diode 23 and a constant current circuit 24 that supplies a constant current to the Zener diode.
５は伝送端側であって、２Ｍ伝送路ＬＮに負荷電施工、
の順方向に挿入接続した発光ダイオードで、負荷電施工
、の大きさに対応した光強度で発光する。６はこの発光
ダイオード５からの光を受光するフォトダイオードで、
例えばＰＩＮフォト・ダイオードが使用され、受光した
光強度に対応した電気信号１１を生ずる。６１はフォト
ダイオード６に接続されたリニアライザで、抵抗３１
、５２に流れる電流１２と負荷電流ＩＬとが比例関係に
なるようにするもので、フォトダイオ・−ドロの出力信
号１１が負荷電流片と比例関係にあれば不要である。5 is the transmission end side, where load power is installed on the 2M transmission line LN;
A light emitting diode inserted and connected in the forward direction of the load emits light with an intensity corresponding to the size of the load. 6 is a photodiode that receives light from this light emitting diode 5;
For example, a PIN photodiode is used, producing an electrical signal 11 corresponding to the intensity of the light received. 61 is a linearizer connected to photodiode 6, and resistor 31
, 52 and the load current IL are in a proportional relationship, and is unnecessary if the output signal 11 of the photodiode is in a proportional relationship with the load current.
この様に構成した装置の動作を次に説明する。The operation of the apparatus configured in this way will be explained next.
伝送すべき信号ｅ、は、電圧応答手段２の一方の入力端
に印加され、ここで増幅された後、電流調整手段１に印
加される。この電流調整手段１は、２線伝送路ＬＮを介
して負荷りと直列に接続されておシ、負荷電流化を伝送
すべき信号ｅに対、しして調整する。負荷電流片は、２
腺伝送路ＬＮＫ挿入接続された発光ダイオード５にも同
様に流れ、これによって発光ダイオード５が負荷１ｕ流
Ｉ、に対応した光強度で発光する。The signal e to be transmitted is applied to one input of the voltage response means 2, amplified there and then applied to the current adjustment means 1. This current adjusting means 1 is connected in series with a load via a two-wire transmission line LN, and adjusts the load current with respect to the signal e to be transmitted. The load current piece is 2
A similar flow also flows to the light emitting diode 5 inserted and connected to the gland transmission line LNK, so that the light emitting diode 5 emits light with a light intensity corresponding to the load 1u flow I.
第３図は発光ダイオード５の電圧電流特性を示した紳図
である。この特性から明らかなように、負荷電流ＩＬの
増加にかかわらず、順方向の電圧降下Ｖｄは僅かであっ
て、この発光ダイオード５部分での電力消費はほとんど
ない。FIG. 3 is a diagram showing the voltage-current characteristics of the light emitting diode 5. As is clear from this characteristic, the forward voltage drop Vd is small regardless of the increase in the load current IL, and there is almost no power consumption in the light emitting diode 5 portion.
発光ダイオード５からの光は、フォー・ダイオード６に
照射され、光強度、すなわち負荷電流片に対応した出力
信号１１を生じる。この実施例では、フォトダイメート
６は、抵抗？＋１，３２、リニアライザ６１を介して直
列に接続され、この直列回路にソエヤタ゛イオード２３
で定電圧化きれた定電圧Ｖｚがバイアスとして印加され
る（１°（成となっており、抵抗３２の一端に生ずる１
）Ｌ圧ｅは、負荷電施工。と比例間係となる。The light from the light emitting diode 5 is incident on the four diode 6 and produces an output signal 11 corresponding to the light intensity, ie the load current component. In this embodiment, the photodimate 6 is a resistor. +1, 32 are connected in series via a linearizer 61, and a soyer diode 23 is connected to this series circuit.
A constant voltage Vz that has been made constant at 1° is applied as a bias (1°
)L pressure e is for load electric construction. It becomes a proportional relationship.
抵抗３２の一端に生じた電圧ｅは、電圧応答イ・段２の
他方の入力端に印加される。従って、電圧応、びフォト
ダイオード６を含む回路は、電圧応答手段２の２つの入
力端電圧が等しく （ｅ、 −ｅ、 ）なるように動作
する。よって、負荷電流ＩＬは、伝送すべき信号ｅ、に
正確に比例したものとなる。The voltage e developed at one end of the resistor 32 is applied to the other input end of the voltage responsive stage 2. Therefore, the circuit including the voltage response means and the photodiode 6 operates so that the two input terminal voltages of the voltage response means 2 are equal (e, -e, ). Therefore, the load current IL is exactly proportional to the signal e to be transmitted.
なお、上記の実施例では発光ダイオードからの光をフォ
トダイオードで受光するものについて示したが、太陽電
池等、受光量に対応した電気信号を出力する素子であれ
ば、これに限定されない。In the above embodiment, a photodiode receives light from a light emitting diode, but the present invention is not limited to this as long as it is an element that outputs an electrical signal corresponding to the amount of light received, such as a solar cell.
以上説明したように、本発明によれば、伝送端側におい
て、伝送路内に電力消費を増大させるような抵抗手段が
ないので消費電力を低減することのできる２紳式伝送器
が実現できる。因みに、発光ダイオード５としてｊ順方
向降下電圧１．５■のＩＪＤを用い、負荷電流■５が４
〜２０．ｍＡ変化する場合、この部分での消費電力は最
大５０ｍＷ程度となり、大幅に′電力消費量を低減でき
る。As described above, according to the present invention, there is no resistance means that increases power consumption in the transmission line on the transmission end side, so it is possible to realize a two-way transmitter that can reduce power consumption. Incidentally, as the light emitting diode 5, an IJD with a forward voltage drop of 1.5 is used, and the load current 5 is 4.
~20. When changing by mA, the power consumption in this part is about 50 mW at maximum, which can significantly reduce the power consumption.
第１図は従来装置の一例を示す結成ブロック図、第２図
は本発明に係る装置の一例を示す構成フロック図、第３
図は第２図装置に用いられてい、６発光ダイオードの電
圧電流特性紳図である。
１・・・電流調整手段、２・・・ＩＬ圧応答手段、５・
・発光ダイオード、６・・・フメトダイメード、Ｌ・・
・負荷、ＩＩＴ・・・直流′７ｈ、源、ＬＮ・・・２線
伝送路。FIG. 1 is a configuration block diagram showing an example of a conventional device, FIG. 2 is a configuration block diagram showing an example of a device according to the present invention, and FIG.
The figure is a voltage-current characteristic diagram of six light-emitting diodes used in the device shown in Figure 2. DESCRIPTION OF SYMBOLS 1... Current adjustment means, 2... IL pressure response means, 5.
・Light-emitting diode, 6... Fumetodimade, L...
・Load, IIT...DC'7h, source, LN...2-wire transmission line.
Claims (1)
電圧応答手段からの信号により２線伝送路を流れる負荷
電流を調整する電流調整手段、前記２線伝送路に当該伝
送路を流れる電流に対して順方向となるように挿入接続
した発光ダイオード、この発光ダイオードからの光を受
光する受光素子、この受光素子によって得られた信号を
前記電圧応答手段の入力側に負帰還する回路手段を具備
した２＃式伝送器。(1) Voltage response means to which a signal to be transmitted is applied; current adjustment means for adjusting the load current flowing through the two-wire transmission line according to the signal from the voltage response means; current flowing through the two-wire transmission line; a light-emitting diode inserted and connected in a forward direction to the light-emitting diode, a light-receiving element for receiving light from the light-emitting diode, and circuit means for negatively feeding back a signal obtained by the light-receiving element to the input side of the voltage response means. Equipped with 2# type transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22133783A JPS60113545A (en) | 1983-11-24 | 1983-11-24 | Two-line-type transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22133783A JPS60113545A (en) | 1983-11-24 | 1983-11-24 | Two-line-type transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60113545A true JPS60113545A (en) | 1985-06-20 |
Family
ID=16765219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22133783A Pending JPS60113545A (en) | 1983-11-24 | 1983-11-24 | Two-line-type transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60113545A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4989924A (en) * | 1988-03-31 | 1991-02-05 | Aisin Seiki Kabushiki Kaisha | Fluid pressure circuit |
| JPH05123871A (en) * | 1991-10-31 | 1993-05-21 | Yoshiaki Shima | Spot welded rivet |
-
1983
- 1983-11-24 JP JP22133783A patent/JPS60113545A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4989924A (en) * | 1988-03-31 | 1991-02-05 | Aisin Seiki Kabushiki Kaisha | Fluid pressure circuit |
| JPH05123871A (en) * | 1991-10-31 | 1993-05-21 | Yoshiaki Shima | Spot welded rivet |
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