JPH04140032A - Power and signal carrier - Google Patents
Power and signal carrierInfo
- Publication number
- JPH04140032A JPH04140032A JP2260948A JP26094890A JPH04140032A JP H04140032 A JPH04140032 A JP H04140032A JP 2260948 A JP2260948 A JP 2260948A JP 26094890 A JP26094890 A JP 26094890A JP H04140032 A JPH04140032 A JP H04140032A
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- Prior art keywords
- light
- signal
- light wave
- power
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- 238000006243 chemical reaction Methods 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 21
- 238000000926 separation method Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は光波により電力および信号を搬送する電力およ
び信号搬送装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a power and signal carrier device that transports power and signals by means of light waves.
従来の技術
従来の電力と信号を搬送する装置は第３図に示すような
ものがあった。第３図において、１は電力供給手段を有
する主回路で、２は補助回路である。３は主回路から補
助回路に電力および信号を搬送する線路である。電力供
給手段１０１は第１の回路１０２に電力を供給すると共
に線路３を介して補助回路２の第２の回路２０１にも電
力を供給している。また第１の回路１０２の信号は線路
３０３を介して第２の回路２０１に伝送する。2. Description of the Related Art A conventional power and signal conveying device is shown in FIG. In FIG. 3, 1 is a main circuit having power supply means, and 2 is an auxiliary circuit. 3 is a line that carries power and signals from the main circuit to the auxiliary circuit. The power supply means 101 supplies power to the first circuit 102 and also to the second circuit 201 of the auxiliary circuit 2 via the line 3 . Further, the signal of the first circuit 102 is transmitted to the second circuit 201 via the line 303.
発明が解決しようとする課題
しかしながら上記のような構成では、線路が導電性のた
めアンテナの役割をしノイズを回路内に伝送してしまう
ことがある。また線路が水道配管やガス配管の近傍を通
ると漏電や爆発の可能性がある。Problems to be Solved by the Invention However, in the above configuration, since the line is conductive, it may act as an antenna and transmit noise into the circuit. Furthermore, if the lines run near water or gas pipes, there is a possibility of electrical leakage or explosion.
さらに電力線と信号線が別々に必要になり設置が難しく
電力線が直接信号線にノイズ等の悪影響を及ぼすことが
ある。Furthermore, separate power lines and signal lines are required, which makes installation difficult, and the power lines may directly affect the signal lines, such as noise.
本発明の第１の目的はかかる従来の課題を解消するもの
で、電力と信号を異なる波長の光波で伝送することによ
り安全な電力と信号の搬送を可能とすることである。A first object of the present invention is to solve such conventional problems, and to enable safe transmission of power and signals by transmitting the power and signals using light waves of different wavelengths.
また、第２の目的は光波を変調することにより同波長で
電力と信号を伝送することにより簡単に電力と信号の搬
送を可能とすることである。A second purpose is to easily transport power and signals by transmitting power and signals at the same wavelength by modulating light waves.
課題を解決するための手段
上記第１の目的を達成するために本発明の電力および信
号搬送装置は、電力供給手段と前記電力供給手段の電力
を第１の波長の光に変換する第１の発光手段と、伝送す
る信号を変調する変調手段と、前記変調手段の信号を第
２の波長の光に変換する第２の発光手段とを有する主回
路と、光波を第１の波長と第２の波長に分離する光波分
離手段と、第１の波長の光波を電力に変換する第１の光
電変換手段と、第２の波長を復調して信号に戻す復調手
段とを有する補助回路と、前記主回路の発光手段の光波
を前記補助回路の光波分離手段に伝送する光波伝送手段
とを有する構成としたものである。Means for Solving the Problems In order to achieve the above-mentioned first object, the power and signal transfer device of the present invention includes a power supply means and a first light source that converts the power of the power supply means into light of a first wavelength. a main circuit having a light emitting means, a modulating means for modulating a signal to be transmitted, and a second light emitting means for converting the signal of the modulating means into light of a second wavelength; an auxiliary circuit having a light wave separating means for separating the light wave into wavelengths of , a first photoelectric conversion means for converting the light wave of the first wavelength into electric power, and a demodulation means for demodulating the second wavelength and returning it to a signal; The light wave transmitting means transmits the light wave from the light emitting means of the main circuit to the light wave separating means of the auxiliary circuit.
さらに第２の目的を達成するために本発明の電力および
信号搬送装置は、電力供給手段と、伝送する信号を変調
する変調手段と、前記電力供給手段の電力と前記変調手
段の信号とを重畳して発光手段とを有する主回路と、光
波を電力に変換する第１の光電変換手段と、光波内の変
調分を電気に変換する第２の光電変換手段と前記第２の
光電変換手段の信号を復調する復調手段とを有する補助
回路と、前記主回路の発光手段の光波を前記補助回路に
伝送する光波伝送手段とを有する構成としたものである
。Furthermore, in order to achieve the second object, the power and signal transmission device of the present invention includes a power supply means, a modulation means for modulating a signal to be transmitted, and a superimposition of the power of the power supply means and the signal of the modulation means. a main circuit having a light emitting means; a first photoelectric conversion means for converting a light wave into electric power; a second photoelectric conversion means for converting a modulated amount in the light wave into electricity; The auxiliary circuit has demodulation means for demodulating a signal, and light wave transmission means for transmitting light waves from the light emitting means of the main circuit to the auxiliary circuit.
作用
以上の構成により、電力と信号を異なる波長の光波もし
くは変調した光波により回路間を伝送する。Function: With the above configuration, power and signals are transmitted between circuits using light waves of different wavelengths or modulated light waves.
実施例
以下、本発明の一実施例を図面を用いて説明する。なお
、第１図は電力伝送装置の断面図で第３図と同一部品に
ついては同一番号を付している。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. Note that FIG. 1 is a cross-sectional view of the power transmission device, and the same parts as in FIG. 3 are given the same numbers.
主回路１において１０２は第１の回路で、１０３は電力
を光に変える第１の発光手段（たとえばＬＥＤや半導体
レーザ等）、１０４は前記第１の発光手段１０３を駆動
する第１の駆動手段である。In the main circuit 1, 102 is a first circuit, 103 is a first light emitting means (for example, an LED or a semiconductor laser, etc.) that converts electric power into light, and 104 is a first driving means for driving the first light emitting means 103. It is.
１０５は前記第１の回路から補助回路内の第２の回路に
送る信号を変調する変調手段で、１０６は前記変調手段
１０５の信号により発光手段の駆動量を制御する第２の
駆動手段で、１０７は前記第２の駆動手段の信号により
発光する第２の発光手段である。105 is a modulating means for modulating the signal sent from the first circuit to the second circuit in the auxiliary circuit; 106 is a second driving means for controlling the driving amount of the light emitting means by the signal from the modulating means 105; 107 is a second light emitting means that emits light in response to a signal from the second driving means.
補助回路２において２０１は第２の回路で、２０２は光
波を第１の波長と第２の波長に分離する光波分離手段で
、２０３は第１の波長の光波を電力に変換する第１の光
電変換手段で、２０４は第２の波長の光波を電気に変換
する第２の光電変換手段で、２０５は第２の光電変換手
段の信号を復調して信号に戻す復調手段である。２０６
は充電手段である。In the auxiliary circuit 2, 201 is a second circuit, 202 is a light wave separating means that separates a light wave into a first wavelength and a second wavelength, and 203 is a first photoelectric device that converts a light wave of the first wavelength into electric power. In the conversion means, 204 is a second photoelectric conversion means that converts a light wave of a second wavelength into electricity, and 205 is a demodulation means that demodulates the signal of the second photoelectric conversion means and returns it to a signal. 206
is a charging means.
４は発光手段の光を前記光波分離手段２０２まで伝送す
る光波伝送手段である。前記主回路１と前記光波伝送手
段４の間には第１の間隙５を有し、同様に前記補助回路
を前記光波伝送手段４の間には第２の間隙６を有してい
る。Reference numeral 4 denotes a light wave transmission means for transmitting the light from the light emitting means to the light wave separation means 202. A first gap 5 is provided between the main circuit 1 and the light wave transmission means 4, and a second gap 6 is similarly provided between the auxiliary circuit and the light wave transmission means 4.
次に本発明の構成の動作を説明する。Next, the operation of the configuration of the present invention will be explained.
通常玉回路１内の第１の回路１０２には電力供給手段１
０１から電力を直接供給している。補助回路２内の第２
の回路２０１への電力供給と信号伝送の方法を説明する
。The first circuit 102 in the normal ball circuit 1 has a power supply means 1
Power is supplied directly from 01. The second in the auxiliary circuit 2
A method of supplying power to the circuit 201 and transmitting signals will be explained.
例えば、補助回路２が主回路１から離れていたり、人手
の入らない所に設置されると電池交換等ができず電力を
主回路から供給する必要がある。For example, if the auxiliary circuit 2 is located away from the main circuit 1 or installed in a place that cannot be accessed by human hands, the battery cannot be replaced and power must be supplied from the main circuit.
さらに途中の電磁環境が悪いと電気的に信号を送ること
は困難である。Furthermore, if the electromagnetic environment along the way is poor, it is difficult to send signals electrically.
主回路１内では第１の駆動手段１０４により第１の発光
手段１０３（波長λ１）を駆動し電力を光に変換する。In the main circuit 1, a first driving means 104 drives a first light emitting means 103 (wavelength λ1) to convert electric power into light.
また前記第１の回路から補助回路内の第２の回路に送る
信号は変調手段１０５で変調された後、第２の駆動手段
１０６と第２の発光手段１０７（波長λ２）により光に
変換する。Further, the signal sent from the first circuit to the second circuit in the auxiliary circuit is modulated by modulating means 105, and then converted into light by second driving means 106 and second light emitting means 107 (wavelength λ2). .
第１の発光手段１０３および第２の発光手段１０７から
の光波は第１の間隙５を伝搬した後、光波伝送手段４に
入る。光波伝送手段４内を伝搬した光は第２の間隙を通
った後補助回路２内の光波分離手段２０２に達する。The light waves from the first light emitting means 103 and the second light emitting means 107 enter the light wave transmission means 4 after propagating through the first gap 5 . The light propagated within the light wave transmission means 4 reaches the light wave separation means 202 within the auxiliary circuit 2 after passing through the second gap.
光波分離手段２０２は光波を波長λ１の光波と波長λ２
の光波に分離する。波長λ１の光波は第１の光電変換手
段２０３に導かれここで電力に変換する。変換された電
力は充電手段２０６（容量の大きなコンデンサもしくは
２次電池）に充電し安定した電力供給をより可能とする
。The light wave separation means 202 separates the light wave into a light wave with a wavelength λ1 and a light wave with a wavelength λ2.
into light waves. The light wave with wavelength λ1 is guided to first photoelectric conversion means 203, where it is converted into electric power. The converted power charges the charging means 206 (a capacitor or secondary battery with a large capacity), thereby making it possible to provide more stable power supply.
波長λ２の光波は第２の光電変換手段２０４に導かれこ
こで電気信号に変換される。第２の光電変換手段２０４
の出力を復調手段２０５は入力し第１の回路１０２が送
った信号に復調する。第２回路２０１はこの復調された
信号を受けて動作をする。The light wave with wavelength λ2 is guided to second photoelectric conversion means 204, where it is converted into an electrical signal. Second photoelectric conversion means 204
The demodulating means 205 receives the output of the signal and demodulates it into the signal sent by the first circuit 102. The second circuit 201 operates upon receiving this demodulated signal.
また光波伝送手段４の両端面に集光手段４０２゜４０３
を設けると伝送効率を高めることができる。In addition, condensing means 402 and 403 are provided on both end surfaces of the light wave transmission means 4.
By providing , transmission efficiency can be increased.
上記のようにして電力と信号を搬送すると、光波伝送手
段４が水道配管やガス配管の近傍を通っても漏電や爆発
の可能性が無く安全である。さらにもし光波伝送手段４
が水分を吸収し毛細現象により主回路１または補助回路
２に水分が伝わっても第１の間１１ｊ！５および第２の
間隙６を有しているため回路内に水分が入り故障を生じ
ることが無い。When electric power and signals are transmitted as described above, it is safe even if the light wave transmission means 4 passes near water pipes or gas pipes without the possibility of electrical leakage or explosion. Furthermore, light wave transmission means 4
absorbs moisture and is transmitted to the main circuit 1 or the auxiliary circuit 2 due to capillary phenomenon, the first period 11j! 5 and the second gap 6, moisture will not enter the circuit and cause a malfunction.
また線路が非導電性のためアンテナの役割をしノイズを
回路内に伝送してしまうことも無い、さらに線路を１本
で電力と信号を搬送することができ設置を容易とする。In addition, since the line is non-conductive, it acts as an antenna and does not transmit noise into the circuit.Furthermore, a single line can carry power and signals, making installation easy.
さらに電力線が直接信号線にノイズ等の悪影響を及ぼす
ことが無く信転性が向上する。Furthermore, reliability is improved because the power line does not directly affect the signal line with noise or other adverse effects.
第２図の実施例を次に説明する。The embodiment of FIG. 2 will now be described.
主回路１内では第１の回路１０２から補助回路内の第２
の回路２０１に送る信号は変調手段１０５で変調された
後、その信号を第１の駆動手段１０４に送る。第１の駆
動手段１０４は伝送する電力に変調手段１０５からの信
号を重畳して駆動信号を構成する。この駆動信号により
第１発光手段１０３を駆動する。In the main circuit 1, from the first circuit 102 to the second circuit in the auxiliary circuit.
The signal sent to the circuit 201 is modulated by the modulation means 105 and then sent to the first driving means 104. The first driving means 104 constructs a driving signal by superimposing the signal from the modulating means 105 on the transmitted power. The first light emitting means 103 is driven by this drive signal.
第１の発光手段１０３からの光波は第１の間隙５を伝搬
した後、光波伝送手段４に入る。光波伝送手段４内を伝
搬した光は第２の間隙６を通った後補助回路２内の第１
の光電変換手段２０３と第２の光電変換手段２０４に導
かれる。The light wave from the first light emitting means 103 enters the light wave transmission means 4 after propagating through the first gap 5 . The light propagated in the light wave transmission means 4 passes through the second gap 6 and then passes through the first gap in the auxiliary circuit 2.
photoelectric conversion means 203 and second photoelectric conversion means 204.
第１の光電変換手段２０３は光波を電力に変換する。変
換された電力は充電手段２０６（容量の大きなコンデン
サもしくは２次電池）に充電し安定した電力供給をより
可能とする。The first photoelectric conversion means 203 converts light waves into electric power. The converted power charges the charging means 206 (a capacitor or secondary battery with a large capacity), thereby making it possible to provide more stable power supply.
第２の光電変換手段２０４は光波内の信号骨を電気信号
に変換する。第２の光電変換手段２０４の出力を復調手
段２０５は入力し第１の回路１０２が送った信号に復調
する。第２回路２０１はこの復調された信号を受けて動
作をする。The second photoelectric conversion means 204 converts the signal bone within the light wave into an electrical signal. The output of the second photoelectric conversion means 204 is input to the demodulation means 205 and demodulated into the signal sent by the first circuit 102 . The second circuit 201 operates upon receiving this demodulated signal.
発明の効果
以上のように本発明の電力および信号搬送装置は、電力
供給手段と前記電力供給手段の電力を第１の波長の光に
変換する第１の発光手段と、伝送する信号を変調する変
調手段と、前記変調手段の信号を第２の波長の光に変換
する第２の発光手段とを有する主回路と、光波を第１の
波長と第２の波長に分離する光波分離手段と、第１の波
長の光波を電力に変換する第１の光電変換手段と、第２
の波長を復調して信号に戻す復調手段とを有する補助回
路と、前記主回路の発光手段の光波を前記補助回路の光
波分離手段に伝送する光波伝送手段とを有する構成から
なり、光波伝送手段が水道配管やガス配管の近傍を通っ
ても漏電や爆発の可能性が無く安全である。さらにもし
光波伝送手段が水分を吸収し毛細現象により主回路また
は補助回路に水分が伝わっても第１の間隙および第２の
間隙を有しているため回路内に水分が入り故障を生しる
ことが無い。Effects of the Invention As described above, the power and signal transmission device of the present invention includes a power supply means, a first light emitting means that converts the power of the power supply means into light of a first wavelength, and a signal that modulates a signal to be transmitted. a main circuit having a modulation means and a second light emitting means for converting the signal of the modulation means into light of a second wavelength; a light wave separation means for separating the light wave into a first wavelength and a second wavelength; a first photoelectric conversion means that converts a light wave of a first wavelength into electric power;
an auxiliary circuit having demodulation means for demodulating the wavelength of the main circuit and returning it to a signal, and a light wave transmission means for transmitting the light wave of the light emitting means of the main circuit to the light wave separation means of the auxiliary circuit, the light wave transmission means Even if it passes near water pipes or gas pipes, there is no possibility of electrical leakage or explosion, so it is safe. Furthermore, even if the light wave transmission means absorbs moisture and the moisture is transmitted to the main circuit or auxiliary circuit due to capillary phenomenon, the moisture will enter the circuit and cause a failure because it has the first gap and the second gap. Nothing happens.
また線路が非導電性のためアンテナの役割をしノイズを
回路内に伝送してしまうことも無い。さらに線路を１本
で電力と信号を搬送することかでき設置を容易とする。Also, since the line is non-conductive, it acts as an antenna and does not transmit noise into the circuit. Furthermore, it is possible to carry power and signals using a single line, making installation easier.
さらに電力線が直接信号線にノイズ等の悪影響を及ぼす
ことが無（信転性が向上する。Furthermore, the power line does not directly affect the signal line with noise or other negative effects (reliability is improved).
また本発明は、電力供給手段と、伝送する信号を変調す
る変調手段と、前記電力供給手段の電力と前記変調手段
の信号とを重畳して発光手段とを有する主回路と、光波
を電力に変換する第１の光電変換手段と、光波内の変調
分を電気に変換する第２の光電変換手段と前記第２の光
電変換手段の信号を復調する復調手段とを有する補助回
路と、前記主回路の発光手段の光波を前記補助回路ムこ
伝送する光波伝送手段とを有する構成からなり、伝送す
る光波を変調することにより同波長で電力と信号を伝送
することができ簡単に電力と信号の搬送を可能とするこ
とである。The present invention also provides a main circuit having a power supply means, a modulation means for modulating a signal to be transmitted, a light emitting means by superimposing the power of the power supply means and the signal of the modulation means, and a main circuit that converts light waves into power. an auxiliary circuit having a first photoelectric conversion means for converting, a second photoelectric conversion means for converting a modulated amount in the light wave into electricity, and a demodulation means for demodulating the signal of the second photoelectric conversion means; The light wave transmission means transmits the light waves of the light emitting means of the circuit to the auxiliary circuit, and by modulating the light waves to be transmitted, it is possible to transmit power and signals at the same wavelength. The goal is to make transportation possible.
第１図は本発明の一実施例の電力搬送装置のブロック図
、第２図は同装置の他の実施例ムこおけるフロック図、
第３ｒｇＪは従来の電力および信号搬送装置のブロック
図である。
ｌ・・・・・・主回路、２・・・・・・補助回路、４・
・・・・・光波伝送手段、訃−−−−−第１の間隙、６
・・・・・・第２の間隙、１０３・・・・・・第１の発
光手段、１０７・・・用筆２の発光手段、２０２・・・
・・・光波分離手段、４０３．４０４・・・・・集光手
段。
代理人の氏名 弁理士 小鍜治 明 はが２名１ 凹３
８−
４ρｚ ４ρ３
−Ｉ光呼投
第
図FIG. 1 is a block diagram of a power transfer device according to one embodiment of the present invention, and FIG. 2 is a block diagram of another embodiment of the same device.
3rd rgJ is a block diagram of a conventional power and signal carrying device. l...Main circuit, 2...Auxiliary circuit, 4.
...Light wave transmission means, first gap, 6
...Second gap, 103...First light emitting means, 107...Light emitting means of brush 2, 202...
... Light wave separation means, 403.404 ... Light condensing means. Name of agent: Patent attorney Akira Okaji 2 people 1 name 3 people
8- 4ρz 4ρ3 -I light call diagram
Claims (2)
波長の光に変換する第１の発光手段と、伝送する信号を
変調する変調手段と、前記変調手段の信号を第２の波長
の光に変換する第２の発光手段とを有する主回路と、光
波を第１の波長と第２の波長に分離する光波分離手段と
、第１の波長の光波を電力に変換する第１の光電変換手
段と、第２の波長を復調して信号に戻す復調手段とを有
する補助回路と、前記主回路の発光手段の光波を前記補
助回路の光波分離手段に伝送する光波伝送手段とを有す
る電力および信号搬送装置。(1) A power supply means, a first light emitting means that converts the power of the power supply means into light of a first wavelength, a modulation means that modulates the signal to be transmitted, and a signal of the modulation means that converts the signal of the modulation means into light of a second wavelength. a main circuit having a second light emitting means for converting the light wave into light of the first wavelength, a light wave separating means for separating the light wave into a first wavelength and a second wavelength, and a first light emitting means for converting the light wave of the first wavelength into electric power. an auxiliary circuit having a photoelectric conversion means, a demodulation means for demodulating the second wavelength and returning it to a signal, and a light wave transmission means for transmitting the light wave of the light emitting means of the main circuit to the light wave separation means of the auxiliary circuit. Power and signal carrier equipment.
段と、前記電力供給手段の電力と前記変調手段の信号と
を重畳して発光手段とを有する主回路と、光波を電力に
変換する第１の光電変換手段と、光波内の変調分を電気
に変換する第２の光電変換手段と前記第２の光電変換手
段の信号を復調する復調手段とを有する補助回路と、前
記主回路の発光手段の光波を前記補助回路に伝送する光
波伝送手段とを有する電力および信号搬送装置。(2) A main circuit having a power supply means, a modulation means for modulating a signal to be transmitted, and a light emitting means by superimposing the power of the power supply means and the signal of the modulation means, and converting light waves into electric power. an auxiliary circuit having a first photoelectric conversion means, a second photoelectric conversion means for converting a modulated amount in a light wave into electricity, and a demodulation means for demodulating a signal of the second photoelectric conversion means; and a light wave transmission means for transmitting light waves of the light emitting means to the auxiliary circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2260948A JP2727751B2 (en) | 1990-09-28 | 1990-09-28 | Power and signal carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2260948A JP2727751B2 (en) | 1990-09-28 | 1990-09-28 | Power and signal carrier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04140032A true JPH04140032A (en) | 1992-05-14 |
| JP2727751B2 JP2727751B2 (en) | 1998-03-18 |
Family
ID=17354999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2260948A Expired - Fee Related JP2727751B2 (en) | 1990-09-28 | 1990-09-28 | Power and signal carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2727751B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07222381A (en) * | 1994-01-26 | 1995-08-18 | Sony Tektronix Corp | Power supply |
| JPH08191273A (en) * | 1995-01-10 | 1996-07-23 | Hitachi Ltd | Subscriber's optical line terminal equipment and its feeding method |
| CN112026574A (en) * | 2020-07-16 | 2020-12-04 | 华为技术有限公司 | Positioning system, device and method based on low-frequency magnetic field |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55157944A (en) * | 1979-05-25 | 1980-12-09 | Fujitsu Ltd | Optical energy current feeding system |
| JPS60109340A (en) * | 1983-11-17 | 1985-06-14 | Sharp Corp | Power supply system |
-
1990
- 1990-09-28 JP JP2260948A patent/JP2727751B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55157944A (en) * | 1979-05-25 | 1980-12-09 | Fujitsu Ltd | Optical energy current feeding system |
| JPS60109340A (en) * | 1983-11-17 | 1985-06-14 | Sharp Corp | Power supply system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07222381A (en) * | 1994-01-26 | 1995-08-18 | Sony Tektronix Corp | Power supply |
| JPH08191273A (en) * | 1995-01-10 | 1996-07-23 | Hitachi Ltd | Subscriber's optical line terminal equipment and its feeding method |
| CN112026574A (en) * | 2020-07-16 | 2020-12-04 | 华为技术有限公司 | Positioning system, device and method based on low-frequency magnetic field |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2727751B2 (en) | 1998-03-18 |
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