JPH06242172A - Detecting method for disconnection of speaker circuit - Google Patents
Detecting method for disconnection of speaker circuitInfo
- Publication number
- JPH06242172A JPH06242172A JP4181834A JP18183492A JPH06242172A JP H06242172 A JPH06242172 A JP H06242172A JP 4181834 A JP4181834 A JP 4181834A JP 18183492 A JP18183492 A JP 18183492A JP H06242172 A JPH06242172 A JP H06242172A
- Authority
- JP
- Japan
- Prior art keywords
- disconnection
- speaker
- circuit
- output transformer
- photocoupler
- 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
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
Description
【産業上の利用分野】この発明は、特に屋外に設置され
るようなスピーカシステムにおいて、風雨、風雪等のき
びしい環境下にあり、常に断線の危険性にさらされてい
る、スピーカ及びその回線の断線状態を検出するために
利用するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker and its circuit which are exposed to the danger of disconnection under a severe environment such as rain, wind and snow, especially in a loudspeaker system to be installed outdoors. It is used to detect a disconnection state.
【従来の技術】従来、スピーカ回線の断線検出の方法
は、実信号吹鳴によるトーンバック検出により行ってい
る。そのためスピーカ回線の他にトーンバック回線が必
要であり、又、そのレベル検出回路が複雑である。さら
に、実信号吹鳴のため事実上1日に1〜2回程度の点検
処理しか行えず、24時間体制には向かない等問題点が
多数ある。2. Description of the Related Art Conventionally, a method of detecting a disconnection of a speaker line is a tone back detection by an actual signal sounding. Therefore, a tone-back line is required in addition to the speaker line, and the level detection circuit is complicated. Further, due to the actual sound of the signal, the inspection process can be practically performed only once or twice a day, which is not suitable for a 24-hour system.
【0002】[0002]
【発明が解決しようとする課題】この発明は、スピーカ
回線の断線検出のためにトーンバック回線を必要とせず
簡単に検出でき、さらに実信号吹鳴を必要とせずに断線
検出をできるようにする事により、24時間体制での監
視が行える、スピーカ断線検出の方法となる。SUMMARY OF THE INVENTION According to the present invention, a disconnection of a speaker line can be easily detected without requiring a tone-back line, and a disconnection can be detected without requiring actual signal sounding. This enables a speaker disconnection detection method that enables 24-hour monitoring.
整理番号=K−011−92T
(ぺ−ジ2) −−−−−−−−−−−−−−−−−−−−−−−−−
−−−−−−−−−− まず、この発明の構成を図に基づいて説明すれば次の通
りである。第1図において、1は出力トランス、2は出
力トランスの2次側を交流接続するためのコンデンサ、
3はスピーカ、4はスピーカ内のボイスコイル、5は点
検スイッチ、6はスピーカ断線検出信号出力用のフォト
カプラである。Reference number = K-011-92T
(Page 2) −−−−−−−−−−−−−−−−−−−−−−−−−
---------- First, the structure of the present invention will be described with reference to the drawings. In FIG. 1, 1 is an output transformer, 2 is a capacitor for connecting the secondary side of the output transformer with alternating current,
3 is a speaker, 4 is a voice coil in the speaker, 5 is an inspection switch, and 6 is a photocoupler for outputting a speaker disconnection detection signal.
【0003】[0003]
【実施例】第1図において、1の出力トランスの2次側
の1部を切断して、2のコンデンサで接続する。2のコ
ンデンサで接続する事により、1の出力トランスにかか
る実信号吹鳴の電圧は、交流のためなんら支障をきたさ
ない。この2のコンデンサの両端に直流電圧を印加する
と、3のスピーカの4のボイスコイルを経由して、スピ
ーカ回線に直流電流を流すことができる。本発明では、
この直流電流を6のフォトカプラで受けて、3のスピー
カを含めた回線の断線検出をする方法をとる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a part of a secondary side of an output transformer 1 is cut off and connected with a capacitor 2. By connecting with the capacitor of 2, the voltage of the actual signal blowing on the output transformer of 1 does not cause any trouble because it is an alternating current. When a DC voltage is applied to both ends of this 2 capacitor, a DC current can be passed through the speaker line via the 4 voice coil of the 3 speaker. In the present invention,
A method of receiving this direct current by the photo coupler 6 and detecting disconnection of the line including the speaker 3 is adopted.
【0004】5の点検スイッチを閉じる事により、1の
出力トランスから4のボイスコイル、さらに1の出力ト
ランスに電流が流れるので、6のフォトカプラはオン状
態となる。仮にどこかに断線が生じた場合は、前記のよ
うに電流は流れてこないので、6のフォトカプラはオフ
状態となり、断線しているのが判断できる。When the check switch 5 is closed, a current flows from the output transformer 1 to the voice coil 4 and further to the output transformer 1 so that the photocoupler 6 is turned on. If the wire breaks somewhere, the current does not flow as described above, so that it can be determined that the photocoupler 6 is in the off state and the wire is broken.
【0005】[0005]
1)断線検出のためにスピーカ回線とは別に、トーンバ
ック回線を必要としない。 2)実信号吹鳴による断線検出ではないので、点検時に
スピーカから余計な音を出さない。 3)点検時にスピーカから余計な音を出さないため、2
4時間体制の監視 整理番号=K−011−92T
(ぺ−ジ3) −−−−−−−−−−−−−−−−−−−−−−−−−
−−−−−−−−−− にむいている。 4)簡単な構成で実現できるため、安価にする事が可能
である。1) A tone-back line is not required separately from the speaker line for detecting disconnection. 2) Since the disconnection is not detected by the actual signal, no extra sound is emitted from the speaker during inspection. 3) To prevent unnecessary noise from the speaker during inspection, 2
4-hour monitoring reference number = K-011-92T
(Page 3) −−−−−−−−−−−−−−−−−−−−−−−−−
-------------- 4) It can be realized at a low cost because it can be realized with a simple configuration.
【0006】[0006]
【図1】この発明の構造及び動作を説明するための図で
ある。FIG. 1 is a diagram for explaining the structure and operation of the present invention.
1 出力トランス 2 コンデンサ 3 スピーカ 4 ボイスコイル 5 点検スイッチ 6 フォトカプラ 1 Output transformer 2 Capacitor 3 Speaker 4 Voice coil 5 Inspection switch 6 Photo coupler
Claims (1)
常案内放送において、使用しているスピーカの回線に直
流電流を流し、電流又は電圧の監視を行う事により、ス
ピーカ回線の断線検出を可能とするスピーカ回線断線検
出の方法。 【0001】1. In many emergency broadcasts, such as dam discharge warnings, etc., a direct current is applied to the speaker line used and the current or voltage is monitored to detect disconnection of the speaker line. Method for detecting disconnection of speaker line that enables wireless communication. [0001]
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4181834A JPH06242172A (en) | 1992-06-15 | 1992-06-15 | Detecting method for disconnection of speaker circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4181834A JPH06242172A (en) | 1992-06-15 | 1992-06-15 | Detecting method for disconnection of speaker circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06242172A true JPH06242172A (en) | 1994-09-02 |
Family
ID=16107635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4181834A Pending JPH06242172A (en) | 1992-06-15 | 1992-06-15 | Detecting method for disconnection of speaker circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06242172A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007033288A (en) * | 2005-07-28 | 2007-02-08 | Toa Corp | Loudspeaker line inspection device and terminal device for loudspeaker line inspection device |
JP2009173214A (en) * | 2008-01-25 | 2009-08-06 | Daido Signal Co Ltd | Ats signal receiving device |
US8988203B2 (en) | 2012-03-21 | 2015-03-24 | Denso Corporation | Vehicle presence notification apparatus |
-
1992
- 1992-06-15 JP JP4181834A patent/JPH06242172A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007033288A (en) * | 2005-07-28 | 2007-02-08 | Toa Corp | Loudspeaker line inspection device and terminal device for loudspeaker line inspection device |
JP4493564B2 (en) * | 2005-07-28 | 2010-06-30 | ティーオーエー株式会社 | Speaker line inspection device and terminal device for speaker line inspection device |
JP2009173214A (en) * | 2008-01-25 | 2009-08-06 | Daido Signal Co Ltd | Ats signal receiving device |
US8988203B2 (en) | 2012-03-21 | 2015-03-24 | Denso Corporation | Vehicle presence notification apparatus |
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