JPS59182795U - fire alarm system - Google Patents
fire alarm systemInfo
- Publication number
- JPS59182795U JPS59182795U JP7514583U JP7514583U JPS59182795U JP S59182795 U JPS59182795 U JP S59182795U JP 7514583 U JP7514583 U JP 7514583U JP 7514583 U JP7514583 U JP 7514583U JP S59182795 U JPS59182795 U JP S59182795U
- Authority
- JP
- Japan
- Prior art keywords
- fire
- fire alarm
- current
- detecting
- alarm device
- 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
- Fire Alarms (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来装置の構成を示したブロック図、第２図は
本考案の一実施例を示した回路ブロック図、第３図は第
２図の実施例による呼出しパルスの一例を示した信号波
形図、第４．５図は本考案における呼出しパルスの他の
例を示した信号波形図、第６図は本考案による受信処理
の一実施例を示したフローチャート、第７図は本考案に
よる受信処理を示した信号波形図である。
１：受信機、２，３：電源兼用信号線、４’ａ〜４ｎ：
火災感知器、５：電源、６：呼出回路、７：検出抵抗、
８：Ａ／Ｄ変換器、９：入出力インタフェース、１０：
マイクロコンピュータ、−１２＝警報回路。
］
７（閤２
０
又 又 又
ト ブト
第２図
第６図Fig. 1 is a block diagram showing the configuration of a conventional device, Fig. 2 is a circuit block diagram showing an embodiment of the present invention, and Fig. 3 is a signal showing an example of a calling pulse according to the embodiment of Fig. 2. Waveform diagram, Figure 4.5 is a signal waveform diagram showing another example of the calling pulse in the present invention, Figure 6 is a flow chart showing an example of reception processing according to the present invention, Figure 7 is a signal waveform diagram showing another example of the calling pulse according to the present invention. FIG. 3 is a signal waveform diagram showing reception processing. 1: Receiver, 2, 3: Power supply signal line, 4'a to 4n:
Fire detector, 5: Power supply, 6: Call circuit, 7: Detection resistor,
8: A/D converter, 9: Input/output interface, 10:
Microcomputer, -12=alarm circuit. ] 7 (20)
Claims (1)
知器を複数並列接続し、各感知器は火災にともなう周囲
の物理的変化を検出し、且つ前記−受信機からの呼出し
を受けたときに電流モードで検出信号を返信する火災警
報装置において、前記受信機に、特定の感知器を呼出し
た直後の定常電流を検出する定常電流検出手段と、該呼
出しに応じた感知器よりの返信電流を検出する返信電流
検出手段と、前記定常電流と返信電流との差が予め定め
たしきい値を越えたときに火災を検出する火災判別手段
とを備えたことを特徴とする火災警報装置。A plurality of fire detectors are connected in parallel to a pair of power supply signal lines drawn out from the receiver, and each detector detects physical changes in the surroundings due to a fire, and when receiving a call from the receiver. In a fire alarm device that returns a detection signal in current mode to a fire alarm device, the receiver includes a steady current detection means for detecting a steady current immediately after calling a specific sensor, and a return current from the sensor in response to the calling. What is claimed is: 1. A fire alarm device comprising: a return current detection means for detecting a return current; and a fire discrimination means for detecting a fire when a difference between the steady current and the return current exceeds a predetermined threshold.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7514583U JPS59182795U (en) | 1983-05-19 | 1983-05-19 | fire alarm system |
| NO84841938A NO162317C (en) | 1983-05-19 | 1984-05-15 | FIRE ALARM INSTALLATIONS |
| US06/611,437 US4555695A (en) | 1983-05-19 | 1984-05-17 | Fire alarm system |
| DE3418622A DE3418622A1 (en) | 1983-05-19 | 1984-05-18 | FIRE ALARM SYSTEM |
| CH2446/84A CH658924A5 (en) | 1983-05-19 | 1984-05-18 | FIRE ALARM INSTALLATION. |
| GB08412915A GB2141851B (en) | 1983-05-19 | 1984-05-21 | Fire alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7514583U JPS59182795U (en) | 1983-05-19 | 1983-05-19 | fire alarm system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59182795U true JPS59182795U (en) | 1984-12-05 |
Family
ID=30205219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7514583U Pending JPS59182795U (en) | 1983-05-19 | 1983-05-19 | fire alarm system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59182795U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015026322A (en) * | 2013-07-29 | 2015-02-05 | 能美防災株式会社 | Fire sensor and fire alarm facility using the same |
-
1983
- 1983-05-19 JP JP7514583U patent/JPS59182795U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015026322A (en) * | 2013-07-29 | 2015-02-05 | 能美防災株式会社 | Fire sensor and fire alarm facility using the same |
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