JPS6483181A - Seismic sensor - Google Patents
Seismic sensorInfo
- Publication number
- JPS6483181A JPS6483181A JP62241451A JP24145187A JPS6483181A JP S6483181 A JPS6483181 A JP S6483181A JP 62241451 A JP62241451 A JP 62241451A JP 24145187 A JP24145187 A JP 24145187A JP S6483181 A JPS6483181 A JP S6483181A
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- detected
- circuit
- signals
- earthquake
- 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
Links
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
PURPOSE:To judge whether vibration detected by a sensor is of an earthquake by obtaining the amplitude and frequency of vibration from detecting signals of a vibration sensor and comparing them with a vibration pattern due to an earthquake. CONSTITUTION:A first X and Y sensors 11, 12 are operated intermittently and alternately. Further, a circuit is operated intermittently, at intervals of a second. In the case where a vibration is detected by the sensors 11, 12, the circuit is started by a first vibration and changed over to continuous operation. If the vibration does not continue for tens seconds, the circuit is automatically changed over to intermittent operation. In the case where the vibration is detected, signals waveform shaping circuit 18 that have passed a are transmitted to a CPU 20 together with detected signals from which high frequency components are removed by a LPF 15. The CPU obtains the amplitude and frequency of the vibration from input signals, the input signals are compared with a vibration pattern which is previously stored in a memory 22, and it is judged whether an earthquake occurs.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62241451A JP2557072B2 (en) | 1987-09-25 | 1987-09-25 | Earthquake detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62241451A JP2557072B2 (en) | 1987-09-25 | 1987-09-25 | Earthquake detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6483181A true JPS6483181A (en) | 1989-03-28 |
JP2557072B2 JP2557072B2 (en) | 1996-11-27 |
Family
ID=17074501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62241451A Expired - Lifetime JP2557072B2 (en) | 1987-09-25 | 1987-09-25 | Earthquake detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2557072B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09280940A (en) * | 1996-04-17 | 1997-10-31 | Matsushita Electric Ind Co Ltd | Seismographic apparatus |
JP2000009526A (en) * | 1998-06-25 | 2000-01-14 | Matsushita Electric Ind Co Ltd | Vibration detector |
JP2011528857A (en) * | 2008-07-22 | 2011-11-24 | カール・ツァイス・エスエムティー・ゲーエムベーハー | Actuator and projection exposure system |
JP2013530389A (en) * | 2010-05-25 | 2013-07-25 | ソニー株式会社 | Using a computer video camera to detect earthquakes |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53115281A (en) * | 1977-03-18 | 1978-10-07 | Oki Electric Ind Co Ltd | Earthquake discrimination system |
JPS57117482A (en) * | 1981-01-10 | 1982-07-21 | Mitsubishi Electric Corp | Detector for abnormality of elevator |
-
1987
- 1987-09-25 JP JP62241451A patent/JP2557072B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53115281A (en) * | 1977-03-18 | 1978-10-07 | Oki Electric Ind Co Ltd | Earthquake discrimination system |
JPS57117482A (en) * | 1981-01-10 | 1982-07-21 | Mitsubishi Electric Corp | Detector for abnormality of elevator |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09280940A (en) * | 1996-04-17 | 1997-10-31 | Matsushita Electric Ind Co Ltd | Seismographic apparatus |
JP2000009526A (en) * | 1998-06-25 | 2000-01-14 | Matsushita Electric Ind Co Ltd | Vibration detector |
JP2011528857A (en) * | 2008-07-22 | 2011-11-24 | カール・ツァイス・エスエムティー・ゲーエムベーハー | Actuator and projection exposure system |
JP2013530389A (en) * | 2010-05-25 | 2013-07-25 | ソニー株式会社 | Using a computer video camera to detect earthquakes |
Also Published As
Publication number | Publication date |
---|---|
JP2557072B2 (en) | 1996-11-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3382184D1 (en) | METHOD AND DEVICE FOR EVALUATING RHYTMIC VARIATIONS IN APERIODIC PHYSIOLOGICAL RESPONSE SYSTEMS. | |
DE3780677D1 (en) | CIRCUIT FOR PRE-MAGNETIZING A MAGNETORESISTIVE SENSOR AND AMPLIFYING THE SIGNALS PRODUCED BY IT. | |
JPS6418822A (en) | Coordinate input device | |
JPS6483181A (en) | Seismic sensor | |
DE3381220D1 (en) | ELECTRONIC NAVIGATION METHOD AND SYSTEM. | |
ATE301291T1 (en) | DEVICE AND METHOD FOR HOLOGRAPHIC MEASURING MICROWAVES | |
DE3852602D1 (en) | Device for the detection of video signal correlation and method therefor. | |
DE3875747D1 (en) | CIRCUIT ARRANGEMENT FOR DETECTING THE EXCEEDANCE OF A PRESET FREQUENCY RANGE RANGE. | |
JPS5383663A (en) | Revolving speed display device of revolving body | |
ES536074A0 (en) | A SIGNAL GENERATOR | |
ATE153599T1 (en) | MOTION SENSOR USING MECHANICAL VIBRATIONS | |
JPH0364147U (en) | ||
JPS5315872A (en) | Dew detector | |
JPS5443012A (en) | Amplitude envelope detector of signal waves | |
JPS5436753A (en) | Detection of foreign substance in sealed body | |
JPS5460935A (en) | Detector of residual quantity of toner | |
JPS63155737A (en) | Signal processor | |
JPS5435515A (en) | Method of inspecting tappet rercussive sound | |
NO903644L (en) | SLIN WALL INGLINATION MEASUREMENT SYSTEM. | |
SU560178A1 (en) | Ultrasonic flaw detection method | |
JPS6480870A (en) | Detector for acceleration due to vibration | |
JPS5672317A (en) | Detector for knocking oscillation | |
JPS55149824A (en) | Vibration type pressure measuring apparatus | |
JPS5596432A (en) | Pressure detector | |
JPS5469022A (en) | Information input device |