JP2691615B2 - Signal transmission system - Google Patents
Signal transmission systemInfo
- Publication number
- JP2691615B2 JP2691615B2 JP1160010A JP16001089A JP2691615B2 JP 2691615 B2 JP2691615 B2 JP 2691615B2 JP 1160010 A JP1160010 A JP 1160010A JP 16001089 A JP16001089 A JP 16001089A JP 2691615 B2 JP2691615 B2 JP 2691615B2
- Authority
- JP
- Japan
- Prior art keywords
- signal transmission
- branch
- transmission line
- short
- power
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 [産業上の利用分野] この発明は、ビルや集合住宅における空調システムや
バスシステムなどの管理を行う信号伝送システムに関す
るものである。TECHNICAL FIELD The present invention relates to a signal transmission system for managing an air conditioning system, a bus system, etc. in a building or an apartment house.
[従来の技術] 従来のこの種のシステムとしては、第3図に示すもの
があった。第3図は、例えば「ホームバスの開発調査研
究」37頁(昭和60年7月 ホームバスシステム開発調査
委員会)に示された従来の信号伝送システムの構成を示
すブロック図で、図において(1a)は信号伝送路、(3
a)は信号伝送路(1a)に接続されシステムに給電を行
っている給電装置、(4a),(4n)はそれぞれ信号伝送
装置、(5a),(5b)はそれぞれ信号伝送路(1a)に接
続された負荷抵抗、(30a)は給電装置(3a)内に設け
られた直流電源、(30b)は給電装置(3a)内に設けら
れたチョークコイル、(40a)は信号伝送装置(4a)内
に設けられたインタフェースユニット、(40b)は信号
伝送装置(4a)内に設けられたパルストランス、(40
d)は信号伝送装置(4a)内に設けられた受電回路、(4
0e)は信号伝送装置(4a)内に設けられたチョークコイ
ルである。[Prior Art] A conventional system of this type is shown in FIG. FIG. 3 is a block diagram showing a configuration of a conventional signal transmission system shown in, for example, “Home Bus Development Research and Study” page 37 (Home Bus System Development Research Committee in July 1985). 1a) is the signal transmission line, (3
a) is a power supply device connected to the signal transmission line (1a) to supply power to the system, (4a) and (4n) are signal transmission devices, and (5a) and (5b) are signal transmission lines (1a), respectively. Is connected to the load resistor, (30a) is a DC power source provided in the power feeding device (3a), (30b) is a choke coil provided in the power feeding device (3a), and (40a) is a signal transmission device (4a). ) Is an interface unit, (40b) is a pulse transformer provided in the signal transmission device (4a), and (40b) is a pulse transformer.
d) is a power receiving circuit provided in the signal transmission device (4a), (4
Reference numeral 0e) is a choke coil provided in the signal transmission device (4a).
次に動作について説明する。信号伝送路(1a)には給
電装置(3a)と、第3図では省略しているが(4a)〜
(4n)までのn台の信号伝送装置とが接続されている。
給電装置(3a)はチョークコイル(30b)を介し直流電
源(30a)から信号伝送路(1a)へ電力を送出し、各信
号伝送装置(4a)〜(4n)が自己のチョークコイル(40
e)を介して受電回路(40d)によりこの電力を受電し、
自己の動作電力としている。一方、各信号伝送装置(4
a)〜(4n)相互間における通信は、インターフェース
ユニット(40a)によりパルストランス(40b)を制御
し、信号伝送路(1a)を介してバイポーラパルス(bipo
lar pulse)により行っており、チョークコイル(30
b),(40e)のローパルフィルタ特性を利用して、給電
と通信との両方を一つの信号伝送路(1a)で行ってい
る。Next, the operation will be described. The power transmission device (3a) is provided in the signal transmission line (1a), and although omitted in FIG.
N signal transmission devices up to (4n) are connected.
The power supply device (3a) sends electric power from the DC power supply (30a) to the signal transmission line (1a) via the choke coil (30b), and each of the signal transmission devices (4a) to (4n) has its own choke coil (40a).
This power is received by the power receiving circuit (40d) via e),
It is assumed to be its own operating power. On the other hand, each signal transmission device (4
For communication between a) to (4n), the interface unit (40a) controls the pulse transformer (40b), and the bipolar pulse (bipo) is transmitted via the signal transmission path (1a).
lar pulse) and choke coil (30
Using the low-pal filter characteristics of b) and (40e), both power feeding and communication are performed by one signal transmission line (1a).
[発明が解決しようとする課題] 上記のような従来の信号伝送システムは以上のように
構成され、動作するので、信号伝送路の一部が短絡した
場合でも給電と通信の両方が不可能となり、全ての通信
が行えなくなるといった問題点があった。[Problems to be Solved by the Invention] Since the conventional signal transmission system as described above is configured and operates as described above, both power feeding and communication become impossible even when a part of the signal transmission path is short-circuited. However, there was a problem that all communication could not be performed.
この発明はかかる課題を解決するためになされたもの
で、信号伝送路が短絡した場合でも、その被害を最小限
にくいとめることのできる信号伝送システムを得ること
を目的としている。The present invention has been made to solve the above problems, and an object of the present invention is to obtain a signal transmission system capable of minimizing damage to the signal transmission path even when the signal transmission path is short-circuited.
[課題を解決するための手段] この発明にかかる信号伝送システムは、信号伝送装置
を複数台ごとのグループに分け、各グループごとにそれ
ぞれ分岐信号伝送路に接続し、各分岐信号伝送路を幹線
信号に並列伝送路に接続してシステムを形成すると共
に、各分岐信号伝送路それぞれに当該分岐伝送路が短絡
した場合にこれを検知して当該分岐伝送路を幹線信号伝
送路から切り離す手段を備えることとしたものである。[Means for Solving the Problem] In a signal transmission system according to the present invention, a signal transmission device is divided into a plurality of groups, each group is connected to a branch signal transmission path, and each branch signal transmission path is connected to a trunk line. A signal is connected to the parallel transmission line to form a system, and each branch signal transmission line is provided with means for detecting when the branch transmission line is short-circuited and disconnecting the branch transmission line from the main signal transmission line. It was decided.
[作用] この発明においては、分岐信号伝送路の一つが短絡し
た場合、当該分岐信号伝送路が幹線信号伝送路から切り
離されることとなるので、他の分岐信号伝送路に接続さ
れている信号伝送装置間においては通信を継続すること
が可能となる。[Operation] According to the present invention, when one of the branch signal transmission lines is short-circuited, the branch signal transmission line is disconnected from the main signal transmission line, so that the signal transmission connected to another branch signal transmission line is performed. It is possible to continue communication between the devices.
[実施例] 以下、この発明の実施例を図面について説明する。第
1図はこの発明の一実施例を示すブロック図で、図にお
いて第3図と同一符号は同一又は相当部分を示し、
(1)は幹線信号伝送路、(2a),(2b)はそれぞれ分
岐信号伝送路、(30c),(31c)はそれぞれコンデン
サ、(30d),(31d)はそれぞれヒューズ、(40c)は
コンデンサを示す。Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, in which the same reference numerals as those in FIG. 3 denote the same or corresponding parts,
(1) is a trunk signal transmission line, (2a) and (2b) are branch signal transmission lines, (30c) and (31c) are capacitors, (30d) and (31d) are fuses, and (40c) is a capacitor. Indicates.
図に示すように、この実施例においては、幹線信号伝
送路(1)に分岐信号伝送路(2a),(2b)がそれぞれ
並列に接続され、各分岐信号伝送路(2a),(2b)に
は、それぞれ別々に給電装置(3a),(3b)が接続さ
れ、さらに信号伝送装置(4a)〜(4n)(第1図では
(4a)〜(4d)までを図示する)が、それぞれ複数台づ
つ接続された構成となっている。As shown in the figure, in this embodiment, the branch signal transmission lines (2a) and (2b) are connected in parallel to the trunk signal transmission line (1), and the branch signal transmission lines (2a) and (2b) are connected. Are separately connected to power supply devices (3a) and (3b), and signal transmission devices (4a) to (4n) (in FIG. 1, (4a) to (4d) are shown), It is configured to connect multiple units.
また各給電装置(3a),(3b)は、それぞれ直流電源
(30a),チョークコイル(30b),コンデンサ(30
c),ヒューズ(30d)とから構成され、各信号伝送装置
(4a)〜(4n)は、それぞれインタフェースユニット
(40a),パルストランス(40b),コンデンサ(40
c),受電回路(40d),チョークコイル(40e)とから
構成されている。The power supply devices (3a) and (3b) are respectively composed of a DC power supply (30a), a choke coil (30b), and a capacitor (30).
c) and a fuse (30d), and each signal transmission device (4a) to (4n) includes an interface unit (40a), a pulse transformer (40b), and a capacitor (40n).
c), power receiving circuit (40d), choke coil (40e).
次に動作について説明する。分岐信号伝送路(2a)に
接続された給電装置(3a)は、チョークコイル(30b)
を介し直流電源(30a)から分岐信号伝送路(2a)に接
続されている各信号伝送装置(4a),(4c)へ電力を送
る。Next, the operation will be described. The power supply device (3a) connected to the branch signal transmission line (2a) is a choke coil (30b).
Power is sent from the DC power supply (30a) to each signal transmission device (4a), (4c) connected to the branch signal transmission line (2a) via the.
各信号伝送装置(4a),(4c)では、自己のチョーク
コイル(40e)を介して受電回路(40d)によりこの電力
を受電し、自己の動作電力とする。また分岐信号伝送路
(2b)に接続された給電装置(3b)も、同様にして各信
号伝送装置(4b),(4d)に電力を供給する。In each of the signal transmission devices (4a) and (4c), this power is received by the power receiving circuit (40d) via the choke coil (40e) of its own and used as its own operating power. The power supply device (3b) connected to the branch signal transmission path (2b) also supplies power to the signal transmission devices (4b) and (4d) in the same manner.
一方、分岐信号伝送路(2a)に接続されている信号伝
送装置(4a),(4c)間の通信は、この分岐信号伝送路
(2a)を介してバイポーラ信号により行われ、分岐信号
伝送路(2b)に接続されている信号伝送装置(4b),
(4d)間の通信は、分岐信号伝送路(2b)を介して行わ
れる。そして二つの分岐信号伝送路(2a)と(2b)とに
又がる信号伝送装置、例えば信号伝送装置(4a)と(4
b)との間の通信は、幹線信号伝送路(1)が使用され
る。そして、これらの通信はインタフェースユニット
(40a)によりパルストランス(40b)を制御して行われ
る。On the other hand, the communication between the signal transmission devices (4a) and (4c) connected to the branch signal transmission line (2a) is performed by the bipolar signal via the branch signal transmission line (2a). A signal transmission device (4b) connected to (2b),
Communication between (4d) is performed via the branch signal transmission path (2b). Then, a signal transmission device spanning the two branch signal transmission lines (2a) and (2b), for example, the signal transmission devices (4a) and (4
For communication with b), the trunk signal transmission line (1) is used. Then, these communications are performed by controlling the pulse transformer (40b) by the interface unit (40a).
このようにチョークコイル(30b),(40e)のローパ
スフィルタ特性を利用して、幹線信号伝送路(1)と各
分岐信号伝送路(2a),(2b)とは、一つの信号伝送路
により給電と通信との両方が行えるようになっている。By utilizing the low-pass filter characteristics of the choke coils (30b) and (40e), the trunk signal transmission line (1) and the branch signal transmission lines (2a) and (2b) are connected by one signal transmission line. Both power supply and communication can be performed.
ここで例えば分岐信号伝送路(2a)が短絡したと仮定
する。分岐信号伝送路(2a)が短絡すると、その短絡電
流によりヒューズ(30d)が切れ、分岐信号伝送路(2
a)が幹線信号伝送路(1)から切り離される。すなわ
ち、この場合ヒューズ(30d)が短絡検知手段と分岐信
号伝送路開放手段とを備えており、短絡電流を検知して
分岐信号伝送路(2a)を切り離している。またこの場合
でも分岐信号伝送路(2a)は給電装置(3a)より後が切
り離されるようになっており、幹線信号伝送路(1)と
給電装置(3a)との間に挿入されたコンデンサ(30c)
によって、幹線信号伝送路(1)に部分給電が変化する
ことによる影響を与えないようにしている。Here, it is assumed that the branch signal transmission line (2a) is short-circuited. When the branch signal transmission line (2a) is short-circuited, the fuse (30d) is blown by the short-circuit current and the branch signal transmission line (2a)
a) is disconnected from the trunk signal transmission line (1). That is, in this case, the fuse (30d) includes the short-circuit detection means and the branch signal transmission path opening means, and detects the short-circuit current and disconnects the branch signal transmission path (2a). Also in this case, the branch signal transmission line (2a) is separated from the power feeding device (3a) after the power feeding device (3a), and the capacitor (inserted between the trunk signal transmission line (1) and the power feeding device (3a) ( 30c)
This prevents the influence of the change in the partial power supply on the trunk signal transmission line (1).
従って分岐信号伝送路(2a)が短絡した後でも、幹線
信号伝送路(1)及び分岐信号伝送路(2b)は正常に動
作することとなり、分岐信号伝送路(2b)に接続されて
いる各信号伝送装置、例えば信号伝送装置(4b)と(4
d)との間で通信を継続することができる。Therefore, even after the branch signal transmission line (2a) is short-circuited, the trunk signal transmission line (1) and the branch signal transmission line (2b) operate normally, and each of the branch signal transmission lines (2b) is connected. Signal transmission equipment, for example signal transmission equipment (4b) and (4
d) can continue to communicate with.
第2図はこの発明の他の実施例を示す図で、第1図,
第3図と同一符号は同一又は相当部分を示し、(30e)
は短絡検知回路、(30f)はリレーを示す。FIG. 2 is a diagram showing another embodiment of the present invention.
The same reference numerals as those in FIG. 3 indicate the same or corresponding portions (30e).
Is a short circuit detection circuit, and (30f) is a relay.
この実施例においては、第2図に示すように、分岐信
号伝送路(2a)が短絡した場合、短絡している間を検知
する短絡検知回路(30)を備えていて、この短絡検知回
路(30)からの信号によりリレー(30)を動作させ、短
絡している間だけ幹線信号伝送路(1)から分岐信号伝
送路(2a)を切り離すようにしたものである。In this embodiment, as shown in FIG. 2, when the branch signal transmission path (2a) is short-circuited, a short circuit detection circuit (30) for detecting the short circuit is provided. The relay (30) is operated by a signal from (30), and the branch signal transmission line (2a) is disconnected from the main line signal transmission line (1) only while it is short-circuited.
[発明の効果] この発明は以上説明したとうり、分岐信号伝送路の一
つが短絡した場合、当該分岐信号伝送路が幹線信号伝送
路から切り離されることとなるので、他の分岐信号伝送
路に接続されている信号伝送装置間においては通信を継
続することができ、信号伝送路が短絡した場合でも、そ
の被害を最小限にくいとめることができるようになる。
またシステムを稼働させながら部分的に短絡させること
が可能となり、システムを稼働させながらシステムの工
事を容易に行うことができる等の効果がある。[Effects of the Invention] As described above, according to the present invention, when one of the branch signal transmission lines is short-circuited, the branch signal transmission line is disconnected from the main signal transmission line, so that the other branch signal transmission lines are not connected. Communication can be continued between the connected signal transmission devices, and even if the signal transmission path is short-circuited, the damage can be minimized.
In addition, it is possible to partially short-circuit the system while it is operating, and it is possible to easily carry out the construction of the system while the system is operating.
第1図はこの発明の一実施例を示すブロック図、第2図
はこの発明の他の実施例を示すブロック図、第3図は従
来の信号伝送システムを示すブロック図。 (1)は幹線信号伝送路、(2a),(2b)はそれぞれ分
岐信号伝送路、(3a),(3b)はそれぞれ給電装置、
(4a)〜(4c)はそれぞれ信号伝送装置、(5a),(5
b)はそれぞれ負荷抵抗、(30a)は直流電源、(30b)
はチョークコイル、(30c),(31c)はそれぞれコンデ
ンサ、(30d),(31d)はそれぞれヒューズ、(40a)
はインタフェースユニット、(40b)はパルストラン
ス、(40c)はコンデンサ、(40d)は受電回路、(40
e)はチョークコイル。 なお、各図中同一符号は同一又は相当部分を示すものと
する。FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing another embodiment of the present invention, and FIG. 3 is a block diagram showing a conventional signal transmission system. (1) is a trunk signal transmission line, (2a) and (2b) are branch signal transmission lines, (3a) and (3b) are power supply devices,
(4a) to (4c) are signal transmission devices, (5a) and (5
b) is load resistance, (30a) is DC power supply, (30b)
Is a choke coil, (30c) and (31c) are capacitors, (30d) and (31d) are fuses, and (40a).
Is an interface unit, (40b) is a pulse transformer, (40c) is a capacitor, (40d) is a power receiving circuit, (40
e) is a choke coil. In the drawings, the same reference numerals indicate the same or corresponding parts.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−171347(JP,A) 特開 昭62−176238(JP,A) 特開 昭62−269546(JP,A) 特開 昭58−30255(JP,A) 特開 昭57−115059(JP,A) ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-59-171347 (JP, A) JP-A-62-176238 (JP, A) JP-A-62-269546 (JP, A) JP-A-58- 30255 (JP, A) JP-A-57-115059 (JP, A)
Claims (1)
の信号伝送路で接続し、この一つの信号伝送路で上記給
電装置から各信号伝送装置へ給電を行い、各信号伝送装
置間の通信を行う信号伝送システムにおいて、 信号伝送装置を複数台ごとのグループに分け、各グルー
プごとにそれぞれの分岐信号伝送路で接続するとともに
各分岐信号伝送路をそれぞれ給電装置を介して幹線信号
伝送路に並列に接続してシステムを形成するシステム形
成手段、 上記各分岐信号伝送路それぞれに当該分岐伝送路が短絡
した場合これを検知する短絡検知手段、 上記短絡検知手段で当該分岐伝送路が短絡したことを検
知した場合当該分岐信号伝送路を上記幹線信号伝送路か
ら給電装置を残して切り離す分岐伝送路開放手段、 を備えた信号伝送システム。Claim: What is claimed is: 1. A plurality of signal transmission devices and a power feeding device are connected by one signal transmission path, and the power feeding device feeds power to each signal transmission device through the one signal transmission path. In the signal transmission system that performs communication, the signal transmission devices are divided into groups of multiple units, each branch signal transmission line is connected to each group, and each branch signal transmission line is transmitted via the power supply device to the main line signal transmission. System forming means for forming a system by connecting in parallel to a path, short-circuit detecting means for detecting a short-circuit of the branch transmission path in each of the branch signal transmission paths, short-circuiting the branch transmission path in the short-circuit detecting means When it is detected that the branch signal transmission line is disconnected from the trunk signal transmission line by leaving the power supply device, the signal transmission system is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1160010A JP2691615B2 (en) | 1989-06-22 | 1989-06-22 | Signal transmission system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1160010A JP2691615B2 (en) | 1989-06-22 | 1989-06-22 | Signal transmission system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0324837A JPH0324837A (en) | 1991-02-01 |
JP2691615B2 true JP2691615B2 (en) | 1997-12-17 |
Family
ID=15706027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1160010A Expired - Lifetime JP2691615B2 (en) | 1989-06-22 | 1989-06-22 | Signal transmission system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2691615B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7154413B2 (en) * | 2003-12-11 | 2006-12-26 | Schlumberger Technology Corporation | Fused and sealed connector system for permanent reservoir monitoring and production control |
-
1989
- 1989-06-22 JP JP1160010A patent/JP2691615B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0324837A (en) | 1991-02-01 |
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