JPS5791478A - Electric field type human body detector - Google Patents
Electric field type human body detectorInfo
- Publication number
- JPS5791478A JPS5791478A JP55168922A JP16892280A JPS5791478A JP S5791478 A JPS5791478 A JP S5791478A JP 55168922 A JP55168922 A JP 55168922A JP 16892280 A JP16892280 A JP 16892280A JP S5791478 A JPS5791478 A JP S5791478A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- detection
- higher harmonic
- human body
- frequencies
- 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
- 230000005684 electric field Effects 0.000 title 1
- 238000001514 detection method Methods 0.000 abstract 7
- 238000013459 approach Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/088—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices operating with electric fields
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Burglar Alarm Systems (AREA)
Abstract
PURPOSE:To eliminate the possibility of false announcing occurring in higher harmonic noises completely by using two signals of different frequencies as detection signals and making announcing only when the changes appear simultaneously in the two detection signals. CONSTITUTION:Oscillators 1a, 1b emit signals of frequencies f01, f02 respectively simultaneously, and after these outputs are mixed 1c, they are applied to an exciter. The spacing between these two signals f01, f02 is so selected that when one signal is in proximity to a higher harmonic noise b1, the frequency of the other signal comes roughly to the center of the other two adjacent higher harmonic noises b2, b3. On the reception side, on the other hand, the signal obtained by a detection line 3 is applied dividedly to BPFs 9a, 9b which are so designed as to permit the passage of only the signals of the frequencies f01, f02, respectively. Now, when a human body approaches to the line 3, changes appear in both of the two detection signals, and the two inputs of an AND circuit 10 assume both the detection state. However, when a beat is generated between the detection signals and the higher harmonic noise, the two inputs do not both assume the detection state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55168922A JPS5791478A (en) | 1980-11-28 | 1980-11-28 | Electric field type human body detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55168922A JPS5791478A (en) | 1980-11-28 | 1980-11-28 | Electric field type human body detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5791478A true JPS5791478A (en) | 1982-06-07 |
| JPS6235633B2 JPS6235633B2 (en) | 1987-08-03 |
Family
ID=15877036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55168922A Granted JPS5791478A (en) | 1980-11-28 | 1980-11-28 | Electric field type human body detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5791478A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0838697A3 (en) * | 1996-10-25 | 2001-01-03 | I.E.E. International Electronics & Engineering S.à.r.l. | Apparatus for probing a conductive body and its application in a vehicle-airbag control system |
| JP2008145255A (en) * | 2006-12-08 | 2008-06-26 | Matsushita Electric Works Ltd | Detector for moving object |
| JP2009544938A (en) * | 2006-07-20 | 2009-12-17 | アド セミコンダクター カンパニー，リミテッド | Capacitance detection method and detection apparatus using time-division multiple frequencies |
| US8576664B2 (en) | 2006-11-20 | 2013-11-05 | Panasonic Corporation | Moving object detection system |
-
1980
- 1980-11-28 JP JP55168922A patent/JPS5791478A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0838697A3 (en) * | 1996-10-25 | 2001-01-03 | I.E.E. International Electronics & Engineering S.à.r.l. | Apparatus for probing a conductive body and its application in a vehicle-airbag control system |
| JP2009544938A (en) * | 2006-07-20 | 2009-12-17 | アド セミコンダクター カンパニー，リミテッド | Capacitance detection method and detection apparatus using time-division multiple frequencies |
| US8576664B2 (en) | 2006-11-20 | 2013-11-05 | Panasonic Corporation | Moving object detection system |
| JP2008145255A (en) * | 2006-12-08 | 2008-06-26 | Matsushita Electric Works Ltd | Detector for moving object |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6235633B2 (en) | 1987-08-03 |
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