JPS54126499A - Fire detector - Google Patents
Fire detectorInfo
- Publication number
- JPS54126499A JPS54126499A JP3445378A JP3445378A JPS54126499A JP S54126499 A JPS54126499 A JP S54126499A JP 3445378 A JP3445378 A JP 3445378A JP 3445378 A JP3445378 A JP 3445378A JP S54126499 A JPS54126499 A JP S54126499A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- detector
- electrodes
- film
- fire
- 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 Optical Devices Or Fibers (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
PURPOSE: To detect rapidly and exactly fire occurrence by using a piezoelectric high polymer film as the detector element of a fire detector and utilizing pyroelectric effects of the film.
CONSTITUTION: Piezo-electric high polymer film 1a having pyroelectric effects is used as detector element 1 of a fire detector, and electrodes 1b and 1c are provided on the surface and the reverse face of this film 1a respectively. Detector circuit 2 is connected between electrodes 1b and 1c, and source follower circuit 3 provided with resistances 3a and 3b and FET 3c is provided in circuit 2. Then, a constitution where a current generated between electrodes 1b and 1c is detected by circuit 3 is given, and switching circuit 5 is operated by the output of amplifier circuit 4 when the current is over a prescribed current, and fire occurrence is alarmed by speaker 7.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3445378A JPS54126499A (en) | 1978-03-24 | 1978-03-24 | Fire detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3445378A JPS54126499A (en) | 1978-03-24 | 1978-03-24 | Fire detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54126499A true JPS54126499A (en) | 1979-10-01 |
Family
ID=12414658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3445378A Pending JPS54126499A (en) | 1978-03-24 | 1978-03-24 | Fire detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54126499A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63269028A (en) * | 1987-04-25 | 1988-11-07 | Murata Mfg Co Ltd | Temperature detector |
-
1978
- 1978-03-24 JP JP3445378A patent/JPS54126499A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63269028A (en) * | 1987-04-25 | 1988-11-07 | Murata Mfg Co Ltd | Temperature detector |
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