WO2008140609A4 - Methods and apparatus for security device portal sensing - Google Patents
Methods and apparatus for security device portal sensing Download PDFInfo
- Publication number
- WO2008140609A4 WO2008140609A4 PCT/US2007/087383 US2007087383W WO2008140609A4 WO 2008140609 A4 WO2008140609 A4 WO 2008140609A4 US 2007087383 W US2007087383 W US 2007087383W WO 2008140609 A4 WO2008140609 A4 WO 2008140609A4
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- threshold
- sensor
- security device
- magnetic flux
- magnitude
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/02—Monitoring continuously signalling or alarm systems
- G08B29/04—Monitoring of the detection circuits
- G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Alarm Systems (AREA)
- Geophysics And Detection Of Objects (AREA)
- Emergency Alarm Devices (AREA)
Abstract
A security device, according to various aspects of the present invention, detects movement of a provided portal cover. The security device includes a sensor, a bias magnet, and a processor. The sensor provides indicia of a magnitude of a magnetic flux through the sensor. The bias magnet provides the magnetic flux through the sensor. The processor detects a change in the magnitude of the magnetic flux outside an upper boundary and a lower boundary of a first threshold and a second threshold respectively. The sensor does not move with respect to the magnet. Movement between the sensor and the portal cover changes the magnitude of the magnetic flux through the sensor. The processor determines an average value of a series of values of the indicia of the magnitude of the magnetic flux that fall within the upper boundary and the lower boundary of the first threshold. The upper boundary and the lower boundary of the first threshold and the second threshold respectively are set in accordance with the average value.
Claims
AMENDED CLAIMS received by the International Bureau on 24 December 2008 (24.12.2008)
WO 2008/140609 PCT/US2007/087383
Replacement sheets for originally filed sheet no. 18 follow: 1. A security device for detecting movement of a provided portal cover, the security device comprising: a sensor that provides indicia of a magnitude of a magnetic flux through the sensor; a bias magnet that provides the magnetic flux through the sensor; and a processor that receives the indicia of the magnitude of the magnetic flux and detects a change in the magnitude of the magnetic flux outside an upper boundary and a lower boundary of a first threshold and an upper boundary and a lower boundary of a second threshold; wherein: the sensor does not move with respect to the magnet; movement of the sensor with respect to at least one of the portal cover and a portal changes the magnitude of the magnetic flux through the sensor; the processor determines an average value of a series of values of the indicia of the magnitude of the magnetic flux that fall within the upper boundary and the lower boundary of the first threshold; and the upper boundary and the lower boundary of the first threshold and the second threshold respectively are set in accordance with the average value.
2. The security device of claim 1 wherein the processor provides a notice in accordance with the change in the magnitude of the magnetic flux that falls outside the upper boundary and the lower boundary of the second threshold. 3. The security device of claim 1 wherein: the sensor comprises a sensing axis; and the bias magnet provides the magnetic flux parallel to the sensing axis. 4. The security device of claim 1 wherein the average value comprises only the indicia of the magnitude that fall between the lower boundary and the upper boundary of the first threshold. 5. The security device of claim 1 wherein the indicia comprises a voltage. 6. The security device of claim 1 wherein the indicia comprises a current. 1. The security device of claim 1 wherein the sensor couples to a body of the security device and is positioned adjacent to the portal cover. 8. The security device of claim 1 wherein the magnet couples to a body of the security device distal from the portal cover along an axis between the sensor and the magnet.
AMENDED SHEET (ARTICLE 19)
Replacement sheets for originally filed sheet no. 19 follow: 9. The security device of claim 1 wherein the absolute value of the upper boundary and the lower boundary of the first threshold and the second threshold respectively are different. 10. The security device of claim 1 wherein the absolute value of the upper boundary and the lower boundary of the first threshold are less than the absolute value of the upper boundary and the lower boundary of the second threshold. 11. The security device of claim 1 wherein the series of values comprises at least one thousand values. 12. The security device of claim 1 wherein the processor receives indicia of the magnitude at least every 0.5 seconds. 13. The security device of claim 1 wherein the processor comprises an analog-to-digital converter that converts a voltage.
14. A method performed by a security device for detecting movement of a portal cover, the method comprising: averaging a series of values of indicia of a magnitude of a magnetic flux through a sensor that fall within an upper and a lower boundary of a first threshold to provide an average value; detecting indicia of the magnitude of the magnetic flux that falls outside an upper and a lower boundary of a second threshold; and adjusting the upper and the lower boundary of the first threshold and the second threshold respectively in accordance with the average value; wherein: a magnet couples to a body of the security device to provide the magnetic flux through the sensor; the sensor couples to the body; the sensor does not move with respect to the magnet; movement of the sensor with respect to at least one of the portal cover and the portal changes the magnitude of the magnetic flux through the sensor.
15. (Original) The method of claim 14 wherein averaging comprises detecting whether a current indicia of the magnitude of the magnetic flux is less than the upper boundary and greater than the lower boundary of the first threshold. 16. (Original) The method of claim 14 wherein averaging comprises eliminating each indicia that falls outside the upper boundary and the lower boundary of the first threshold.
AMENDED SHEET (ARTICLE 19)
Replacement sheets for originally filed sheet no. 20 follow: 17. The method of claim 14 wherein averaging comprises eliminating each indicia that falls outside the upper boundary and the lower boundary of the second threshold. 18. The method of claim 14 wherein adjusting comprises changing a value of the upper boundary and the lower boundary of the first threshold in accordance with a change in the average value. 19. The method of claim 14 wherein adjusting comprises changing a value of the upper boundary and the lower boundary of the second threshold in accordance with a change in the average value. 20. The method of claim 14 wherein the absolute value of the upper boundary and the lower boundary of the first threshold are less than the absolute value of the upper boundary and the lower boundary of the second threshold.
21. A security device for detecting movement of a provided portal cover, the security device comprising: a sensor that provides indicia of a magnitude of a magnetic flux through the sensor; a bias magnet that provides the magnetic flux through the sensor; and a processor that receives the indicia of the magnitude of the magnetic flux and detects a change in the magnitude of the magnetic flux outside an upper boundary and a lower boundary of a first threshold and an upper boundary and a lower boundary of a second threshold; wherein: the sensor does not move with respect to the magnet; and movement of the sensor with respect to at least one of the portal cover and a portal changes the magnitude of the magnetic flux through the sensor.
AMENDED SHEET (ARTICLE 19)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002670979A CA2670979A1 (en) | 2006-12-16 | 2007-12-13 | Methods and apparatus for security device portal sensing |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US87499606P | 2006-12-16 | 2006-12-16 | |
| US60/874,996 | 2006-12-16 | ||
| US89778507P | 2007-01-26 | 2007-01-26 | |
| US60/897,785 | 2007-01-26 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2008140609A2 WO2008140609A2 (en) | 2008-11-20 |
| WO2008140609A3 WO2008140609A3 (en) | 2009-01-15 |
| WO2008140609A4 true WO2008140609A4 (en) | 2009-02-26 |
Family
ID=39536681
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2007/087383 WO2008140609A2 (en) | 2006-12-16 | 2007-12-13 | Methods and apparatus for security device portal sensing |
| PCT/US2007/087374 WO2008076799A1 (en) | 2006-12-16 | 2007-12-13 | Methods and apparatus for security device removal detection |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2007/087374 WO2008076799A1 (en) | 2006-12-16 | 2007-12-13 | Methods and apparatus for security device removal detection |
Country Status (2)
| Country | Link |
|---|---|
| CA (2) | CA2670979A1 (en) |
| WO (2) | WO2008140609A2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2475106A1 (en) | 2006-02-28 | 2012-07-11 | Rotani Inc. | Methods and apparatus for overlapping mimo antenna physical sectors |
| DE102016225615B4 (en) * | 2016-12-20 | 2023-03-30 | Robert Bosch Gmbh | Device and method for monitoring a mobile object |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7113091B2 (en) * | 1996-05-30 | 2006-09-26 | Script Michael H | Portable motion detector and alarm system and method |
| JP3975627B2 (en) * | 1998-12-31 | 2007-09-12 | カシオ計算機株式会社 | Data communication device |
| DE10000845B4 (en) * | 2000-01-12 | 2006-07-27 | Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh | Method and device for non-contact flatness measurement of metal strips made of ferromagnetic materials |
| US6667615B2 (en) * | 2000-02-10 | 2003-12-23 | Sankyo Seiki Mfg. Co., Ltd. | Coin identifying device using magnetic sensors |
| US6472993B1 (en) * | 2001-10-16 | 2002-10-29 | Pittway Corp. | Singular housing window or door intrusion detector using earth magnetic field sensor |
| GB0220907D0 (en) * | 2002-09-10 | 2002-10-16 | Ingenia Holdings Ltd | Security device and system |
| US7259669B2 (en) * | 2003-04-18 | 2007-08-21 | Savi Technology, Inc. | Method and apparatus for detecting unauthorized intrusion into a container |
-
2007
- 2007-12-13 WO PCT/US2007/087383 patent/WO2008140609A2/en active Search and Examination
- 2007-12-13 CA CA002670979A patent/CA2670979A1/en not_active Abandoned
- 2007-12-13 WO PCT/US2007/087374 patent/WO2008076799A1/en active Search and Examination
- 2007-12-13 CA CA002670959A patent/CA2670959A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008140609A3 (en) | 2009-01-15 |
| WO2008076799A1 (en) | 2008-06-26 |
| CA2670959A1 (en) | 2008-06-26 |
| CA2670979A1 (en) | 2008-11-20 |
| WO2008140609A2 (en) | 2008-11-20 |
| WO2008076799B1 (en) | 2008-08-07 |
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