JPS5686329A - Misalarm preventing method of electrostatic capacity detection type alarm device - Google Patents

Misalarm preventing method of electrostatic capacity detection type alarm device

Info

Publication number
JPS5686329A
JPS5686329A JP16258779A JP16258779A JPS5686329A JP S5686329 A JPS5686329 A JP S5686329A JP 16258779 A JP16258779 A JP 16258779A JP 16258779 A JP16258779 A JP 16258779A JP S5686329 A JPS5686329 A JP S5686329A
Authority
JP
Japan
Prior art keywords
circuit
output
misalarm
supplied
electrostatic capacity
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.)
Granted
Application number
JP16258779A
Other languages
Japanese (ja)
Other versions
JPS6239470B2 (en
Inventor
Takeshi Iwaude
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.)
NIKO DENSHI KK
Original Assignee
NIKO DENSHI KK
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 NIKO DENSHI KK filed Critical NIKO DENSHI KK
Priority to JP16258779A priority Critical patent/JPS5686329A/en
Publication of JPS5686329A publication Critical patent/JPS5686329A/en
Publication of JPS6239470B2 publication Critical patent/JPS6239470B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE: To prevent the misalarm, by detecting the external radio wave through the antenna provided near the object to be warned and cutting off temporarily the alarm circuit when the external radio wave has a force larger than the prescribed level.
CONSTITUTION: The antenna 11 is installed near the safe 1, i.e., the object to be warned by the electrostatic capacity detection type alarm device. The output of the antenna 11 is mixed with the output of the local oscillator 13 through the mixing circuit 12, and the output of the circuit 12 is supplied to the selective amplifier 14 for selection and amplification. The output of the amplifier 14 is supplied to the wave detector 15 to receive a wave detection, and the output of the detector 15 is supplied to the Schmitt circuit 16 to receivd a waveform shaping at a prescribed level and then supplied to the switch circuit 7 after an amplification through the amplifier 17. Thus the circuit 7 is cut off to break the input to the alarm 8. In such way, the misalarm can be prevented when the force of the external radio wave is large than the prescribed level.
COPYRIGHT: (C)1981,JPO&Japio
JP16258779A 1979-12-14 1979-12-14 Misalarm preventing method of electrostatic capacity detection type alarm device Granted JPS5686329A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16258779A JPS5686329A (en) 1979-12-14 1979-12-14 Misalarm preventing method of electrostatic capacity detection type alarm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16258779A JPS5686329A (en) 1979-12-14 1979-12-14 Misalarm preventing method of electrostatic capacity detection type alarm device

Publications (2)

Publication Number Publication Date
JPS5686329A true JPS5686329A (en) 1981-07-14
JPS6239470B2 JPS6239470B2 (en) 1987-08-24

Family

ID=15757419

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16258779A Granted JPS5686329A (en) 1979-12-14 1979-12-14 Misalarm preventing method of electrostatic capacity detection type alarm device

Country Status (1)

Country Link
JP (1) JPS5686329A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015200617A (en) * 2014-04-10 2015-11-12 株式会社ホンダロック Detection device and door handle device
WO2023074743A1 (en) * 2021-10-27 2023-05-04 株式会社東海理化電機製作所 Electrostatic detection device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015200617A (en) * 2014-04-10 2015-11-12 株式会社ホンダロック Detection device and door handle device
WO2023074743A1 (en) * 2021-10-27 2023-05-04 株式会社東海理化電機製作所 Electrostatic detection device

Also Published As

Publication number Publication date
JPS6239470B2 (en) 1987-08-24

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