CA2546609A1 - Security device and alarm system - Google Patents
Security device and alarm system Download PDFInfo
- Publication number
- CA2546609A1 CA2546609A1 CA 2546609 CA2546609A CA2546609A1 CA 2546609 A1 CA2546609 A1 CA 2546609A1 CA 2546609 CA2546609 CA 2546609 CA 2546609 A CA2546609 A CA 2546609A CA 2546609 A1 CA2546609 A1 CA 2546609A1
- Authority
- CA
- Canada
- Prior art keywords
- tag
- rfid
- alarm
- rfid reader
- reader
- 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.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
- G08B13/1427—Mechanical actuation by lifting or attempted removal of hand-portable articles with transmitter-receiver for distance detection
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0227—System arrangements with a plurality of child units
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0272—System arrangements wherein the object is to detect exact location of child or item using triangulation other than GPS
Abstract
A method and system for managing both bulk and non-bulk material and assets using radio frequency (RF) identification devices. The system includes an electronic asset identification device such as RFID tag, a asset management server computer, and receiving equipment which can either be fixed and/or mobile. The asset management server computer can be accessed via internet, cellular or by other communication media to determine asset's current location.
Description
Field of Invention An active RFID tag transmits its unique identifier code, using a pulsating concept, thus the tag transmits the identifier code only when the internal timer/counter expires. The tag transmits using Spread Spectrum concept to avoid collision with other tag transmissions.
'Pulsating transmission method' extends the Tag's battery life to several years, while a unique identifier, one for each tag in the field and transmitted to the receiver from a asset management server computer, is used to decode the transmitted identifiers.
To further extend the tag's battery life, the tag goes into 'sleep mode' between transmissions.
As this invention reduces the tag to a transmitter device only and the rest of the system as a receiver device only the costly and complex transceiver design is eliminated.
BackQround of the Invention This invention relates generally to a security device. In particular, the present invention relates to an antitheft security device and alarm system.
Security devices are a part of doing business today. The low cost and obvious benefit of anti-theft measures make them used on vehicles and even on objects of small value in department and retail stores.
Various active RFID tags are available in the market but too expensive for use on mobile assets such as bicycles, mopeds and other such items. A low cost system to ensure such items are parked at the intended location would be a welcome addition. Specifically, an alarm system is needed that provides warning when property is removed.
The current active tags, in the market, are based on "transceiver" design where a reader sends out a radio signal of a particular frequency. The tag responds to this signal by "replying" in a way that alerts the reader that a tag has just entered its range. This information can then be used to draw conclusions about the location of the tagged object. If a theft is suspected, an alarm can be triggered. Further more, the "interrogation" concept means all the receiver have to be coordinated to ensure "interrogation signal" collision is avoided.
PCT patent. Number: WO/2004/013731 discloses a system in which active tags transmits when queried by a reader.
PCT patent number: WO/2005/086072 discloses a system Spread spectrum used for communication and the correlation signal is used within the receiver for "reply code".
The above patents require the tag to be of a"transceiver" design and while effective for their intended purposes, none of the above proposals provide an anti-theft alarm system that addresses the needs of decentralized receivers.
Therefore, it is desirable to have a security device and alarm system that is unobtrusive, can be used in a variety of settings, is able to monitor and distinguish between multiple objects, alerts the asset management server computer when the device is turned off or missing from its intended location.
Summary of the Invention These and other problems are generally solved or circumvented, and technical advantages are generally achieved, by advantageous embodiments of the present invention which includes a tag that transmits periodically and a receiver that continually monitors for the tag transmissions.
In one embodiment, the receiver includes a control and processing system having a correlation subsystem that correlates a reference identifier code with the transmission from a radio frequency identification (RFID) tag and provides a correlation signal therefrom. The control and processing system also includes a decision subsystem that verifies a presence of the RFID tag as a function of the correlation signal.
In another aspect, the present invention provides a central management server computer which updates the receiver with a reference identifier code of the tag to monitor. The asset management server computer is accessed via internet, cellular or by other communication media for update or maintenance and the receiver is updated by asset management server computer using remote communications means.
In another aspect, the present invention provides means of using multiple receivers, stationary or mobile, to track a single tag without a need for coordinating signal between them.
In another aspect, the present invention provides means of reading multiple tags simultaneously using the reference code.
In yet another aspect, the present invention provides a means for multiple receivers to triangulate the location of tag without having a coordinating 1 o signal between the receivers.
The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures or processes for carrying out the same purposes of the present invention. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the invention as set forth in the appended claims.
Brief Description of the Drawins In drawings which illustrate by way of example only a preferred embodiment of the present invention, Figure 1 is a block diagram of one embodiment of the present invention showing active RFID tags and a receiver;
Figure 2 shows tag transmitter on/off time; and Figure 3 is a block diagram of system showing the "asset management server computer"
Detailed Description of the Invention As shown in Figure 1, in one embodiment the present invention comprises a tag (10) that uses either a timer or counter to count pre-defined number of pulses. Tag (10) transmits its identifier whenever the timer or counter indicates its time to transmit, thus the tag (10) transmits periodically, as shown in Fig 2.
As there a number of tags in the field and each tag transmits at its own pace, spread spectrum communication method, described in US patent number 5,410,570 and owned by the applicants, is used to prevent the corruption or collision of transmitted signals.
The RFID sensing subsystem (24) in Fig 1, receives the transmissions from various tags in the field and forwards the transmitted signal to control and processing subsystem (28) to extract tag identifier. The control and processing subsystem (28) correlates the tag information received from subsystem 24 and reference identifier code pre-stored in memory by asset management server computer (70), the correlation signal verifies a presence or absence of the RFID tag.
Fig 3 shows the asset management server computer (70) which can be updated by a number of means. In one element of present invention, user (40) updates his/her tag's identifier, for monitoring by the RFID receiver (20). When RFID receiver (20) receives the reference identifier code from asset management server computer (70) it updates the local memory to monitor the tag.
The RFID receiver (20) with its updated memory, monitors the transmitted signals from subsystem (24) and correlates to stored identifier data in subsystem (28), when a match is found, the RFID receiver (20) sends a conformation signal to asset management server computer (70) which in turns lets the user (40) and operator (50) know that the asset is being monitored.
If the tag's (20) signal is missed by RFID receiver (20) for preset period of time, set by maintenance (60) a local alarm is raised and a signal is sent to asset management server computer (70) which sends a message, such as 'asset is missing' to user 40 and to operator (50) who can notify the local authority.
As tags (10) transmit unique identifier code and the RFID receiver 20 receive the transmission, multiple RFID receivers (20) can used at the same time. This concept allows each receiver to perform its individual tasks and can also be used to triangulate the location of transmitting tag.
In an alternate aspect of the invention, the receiver (20) can use an updated control and processing subsystem to correlate multiple reference identifier codes with the transmission from RFID tag (10) to process or read multiple tags at the same time or compare a single tag transmission with multiple reference identifier codes.
'Pulsating transmission method' extends the Tag's battery life to several years, while a unique identifier, one for each tag in the field and transmitted to the receiver from a asset management server computer, is used to decode the transmitted identifiers.
To further extend the tag's battery life, the tag goes into 'sleep mode' between transmissions.
As this invention reduces the tag to a transmitter device only and the rest of the system as a receiver device only the costly and complex transceiver design is eliminated.
BackQround of the Invention This invention relates generally to a security device. In particular, the present invention relates to an antitheft security device and alarm system.
Security devices are a part of doing business today. The low cost and obvious benefit of anti-theft measures make them used on vehicles and even on objects of small value in department and retail stores.
Various active RFID tags are available in the market but too expensive for use on mobile assets such as bicycles, mopeds and other such items. A low cost system to ensure such items are parked at the intended location would be a welcome addition. Specifically, an alarm system is needed that provides warning when property is removed.
The current active tags, in the market, are based on "transceiver" design where a reader sends out a radio signal of a particular frequency. The tag responds to this signal by "replying" in a way that alerts the reader that a tag has just entered its range. This information can then be used to draw conclusions about the location of the tagged object. If a theft is suspected, an alarm can be triggered. Further more, the "interrogation" concept means all the receiver have to be coordinated to ensure "interrogation signal" collision is avoided.
PCT patent. Number: WO/2004/013731 discloses a system in which active tags transmits when queried by a reader.
PCT patent number: WO/2005/086072 discloses a system Spread spectrum used for communication and the correlation signal is used within the receiver for "reply code".
The above patents require the tag to be of a"transceiver" design and while effective for their intended purposes, none of the above proposals provide an anti-theft alarm system that addresses the needs of decentralized receivers.
Therefore, it is desirable to have a security device and alarm system that is unobtrusive, can be used in a variety of settings, is able to monitor and distinguish between multiple objects, alerts the asset management server computer when the device is turned off or missing from its intended location.
Summary of the Invention These and other problems are generally solved or circumvented, and technical advantages are generally achieved, by advantageous embodiments of the present invention which includes a tag that transmits periodically and a receiver that continually monitors for the tag transmissions.
In one embodiment, the receiver includes a control and processing system having a correlation subsystem that correlates a reference identifier code with the transmission from a radio frequency identification (RFID) tag and provides a correlation signal therefrom. The control and processing system also includes a decision subsystem that verifies a presence of the RFID tag as a function of the correlation signal.
In another aspect, the present invention provides a central management server computer which updates the receiver with a reference identifier code of the tag to monitor. The asset management server computer is accessed via internet, cellular or by other communication media for update or maintenance and the receiver is updated by asset management server computer using remote communications means.
In another aspect, the present invention provides means of using multiple receivers, stationary or mobile, to track a single tag without a need for coordinating signal between them.
In another aspect, the present invention provides means of reading multiple tags simultaneously using the reference code.
In yet another aspect, the present invention provides a means for multiple receivers to triangulate the location of tag without having a coordinating 1 o signal between the receivers.
The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures or processes for carrying out the same purposes of the present invention. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the invention as set forth in the appended claims.
Brief Description of the Drawins In drawings which illustrate by way of example only a preferred embodiment of the present invention, Figure 1 is a block diagram of one embodiment of the present invention showing active RFID tags and a receiver;
Figure 2 shows tag transmitter on/off time; and Figure 3 is a block diagram of system showing the "asset management server computer"
Detailed Description of the Invention As shown in Figure 1, in one embodiment the present invention comprises a tag (10) that uses either a timer or counter to count pre-defined number of pulses. Tag (10) transmits its identifier whenever the timer or counter indicates its time to transmit, thus the tag (10) transmits periodically, as shown in Fig 2.
As there a number of tags in the field and each tag transmits at its own pace, spread spectrum communication method, described in US patent number 5,410,570 and owned by the applicants, is used to prevent the corruption or collision of transmitted signals.
The RFID sensing subsystem (24) in Fig 1, receives the transmissions from various tags in the field and forwards the transmitted signal to control and processing subsystem (28) to extract tag identifier. The control and processing subsystem (28) correlates the tag information received from subsystem 24 and reference identifier code pre-stored in memory by asset management server computer (70), the correlation signal verifies a presence or absence of the RFID tag.
Fig 3 shows the asset management server computer (70) which can be updated by a number of means. In one element of present invention, user (40) updates his/her tag's identifier, for monitoring by the RFID receiver (20). When RFID receiver (20) receives the reference identifier code from asset management server computer (70) it updates the local memory to monitor the tag.
The RFID receiver (20) with its updated memory, monitors the transmitted signals from subsystem (24) and correlates to stored identifier data in subsystem (28), when a match is found, the RFID receiver (20) sends a conformation signal to asset management server computer (70) which in turns lets the user (40) and operator (50) know that the asset is being monitored.
If the tag's (20) signal is missed by RFID receiver (20) for preset period of time, set by maintenance (60) a local alarm is raised and a signal is sent to asset management server computer (70) which sends a message, such as 'asset is missing' to user 40 and to operator (50) who can notify the local authority.
As tags (10) transmit unique identifier code and the RFID receiver 20 receive the transmission, multiple RFID receivers (20) can used at the same time. This concept allows each receiver to perform its individual tasks and can also be used to triangulate the location of transmitting tag.
In an alternate aspect of the invention, the receiver (20) can use an updated control and processing subsystem to correlate multiple reference identifier codes with the transmission from RFID tag (10) to process or read multiple tags at the same time or compare a single tag transmission with multiple reference identifier codes.
Claims (7)
1. An alarm system, comprising: an RFID reader having means for receiving signals from an RFID tag, said RFID tag having means of periodically transmitting a plurality of unique alarm signals;
a plurality of RFID tags remote from said RFID reader, each said RFID tag transmitter having a predetermined tag transmission identifier different from a predetermined tag transmission identifier of any other said tag transmitter, each said RFID tag being associated with a respective unique asset;
wherein said RFID reader includes means for recognizing a respective tag transmission identifier and for associating said recognized tag transmission identifier with a corresponding RFID tag and a corresponding unique asset;
and an alarm unit remote from said RFID reader and said plurality of RIFD
tags having an alarm receiver for receiving missing tag information, said alarm unit including means for energizing said alarm according to alarm signal received by said alarm receiver, whereby to indicate said corresponding RFID tag.
a plurality of RFID tags remote from said RFID reader, each said RFID tag transmitter having a predetermined tag transmission identifier different from a predetermined tag transmission identifier of any other said tag transmitter, each said RFID tag being associated with a respective unique asset;
wherein said RFID reader includes means for recognizing a respective tag transmission identifier and for associating said recognized tag transmission identifier with a corresponding RFID tag and a corresponding unique asset;
and an alarm unit remote from said RFID reader and said plurality of RIFD
tags having an alarm receiver for receiving missing tag information, said alarm unit including means for energizing said alarm according to alarm signal received by said alarm receiver, whereby to indicate said corresponding RFID tag.
2. The alarm system as in claim 1 wherein: said means in said RFID reader for receiving said signals is a reader receiver; and said RFID reader further includes a CPU having means for determining whether an appropriate identifier is received by said reader receiver, said CPU further including means for actuating transmission of said alarm signal if said appropriate identifier is not received by said reader receiver.
3. The alarm system as in claim 2 wherein said CPU includes means for actuating transmission of a said alarm signal when said RFID reader has been deactivated.
4. The alarm system as in claim 1 further comprising means in said RFID
reader for actuating transmission of a said alarm signal when said RFID
reader has been deactivated.
reader for actuating transmission of a said alarm signal when said RFID
reader has been deactivated.
5. The alarm system as in claim 1 wherein each said RFID tag is an active RFID tag having a power source for powering said respective tag transmitter.
6. The alarm system as in claim 1 wherein said RFID reader has memory means to hold tag identifier for comparison with identifier signal received from the said remote tags
7. The alarm system as in claim 1 wherein said RFID reader wherein the memory is updated by asset management server computer
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2546609 CA2546609A1 (en) | 2006-05-09 | 2006-05-09 | Security device and alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2546609 CA2546609A1 (en) | 2006-05-09 | 2006-05-09 | Security device and alarm system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2546609A1 true CA2546609A1 (en) | 2007-11-09 |
Family
ID=38663465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2546609 Abandoned CA2546609A1 (en) | 2006-05-09 | 2006-05-09 | Security device and alarm system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2546609A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009033261A1 (en) * | 2007-09-10 | 2009-03-19 | Nazir Dosani | Anti-theft device for vehicles and portable devices |
| WO2009067964A1 (en) * | 2007-11-29 | 2009-06-04 | Thomas Beck | Device for monitoring objects |
| EP2662799A1 (en) | 2012-05-08 | 2013-11-13 | Viloc bvba | Active RFID based track and trace system |
-
2006
- 2006-05-09 CA CA 2546609 patent/CA2546609A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009033261A1 (en) * | 2007-09-10 | 2009-03-19 | Nazir Dosani | Anti-theft device for vehicles and portable devices |
| WO2009067964A1 (en) * | 2007-11-29 | 2009-06-04 | Thomas Beck | Device for monitoring objects |
| EP2662799A1 (en) | 2012-05-08 | 2013-11-13 | Viloc bvba | Active RFID based track and trace system |
| WO2013167649A1 (en) | 2012-05-08 | 2013-11-14 | Viloc Bvba | Active rfid based track and trace system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |