JPS54126499A - Fire detector - Google Patents

Fire detector

Info

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
Application number
JP3445378A
Other languages
Japanese (ja)
Inventor
Daishiro Hayakawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP3445378A priority Critical patent/JPS54126499A/en
Publication of JPS54126499A publication Critical patent/JPS54126499A/en
Pending legal-status Critical Current

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
JP3445378A 1978-03-24 1978-03-24 Fire detector Pending JPS54126499A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63269028A (en) * 1987-04-25 1988-11-07 Murata Mfg Co Ltd Temperature detector

Cited By (1)

* Cited by examiner, † Cited by third party
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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