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公开(公告)号：DE602005004605D1
公开(公告)日：2008-03-20
申请号：DE602005004605
申请日：2005-03-16
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： BRIDGELALL RAJ , DURON MARK WILLIAM , STRZELCZYK MARTIN J
Abstract: A multi-resolution object location system and method for locating objects is provided. The multi-resolution system and method uses a long-range object locator together with a more precise RFID locator to efficiently and accurately determine the location of objects that include an RFID tag. The long-range object locator has a relatively longer range and can cover a relatively large area to determine the general location of the object within the large area. The RFID locator has a relatively shorter range, but is able to locate the object more precisely. The object location system uses the long-range locator to first determine the general location of the object, and then the RFID locator is used to determine a more accurate location of the object. Thus, the multi-resolution object location system is able to provide both a long range location of objects over a large area and a precise location of objects.
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公开(公告)号：CA2557341A1
公开(公告)日：2005-09-15
申请号：CA2557341
申请日：2005-02-25
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： STRZELCZYK MARTIN J , DURON MARK WILLIAM , BRIDGELALL RAJ
Abstract: A system and method is provided for locating objects using RFID tags. The system and method uses an RFID reader and a distance calculator to efficiently and accurately determine the location of objects that include an RFID tag. The RFID reader transmits a plurality of signals to the RFID tag, with the plurality of signals having different fundamental frequencies. In response, the RFID tag backscatter modulates the plurality of transmitted signals to create a plurality of backscatter modulated signals. The RFID reader receives and demodulates the plurality of backscatter modulated signals. The distance calculator determines the phase of the plurality of backscatter modulated signals and determines a rate of change of the phase in the backscatter modulated signals with respect to the rate of change in the fundamental frequency of the transmitted signals and uses this information to calculate the distance to the RFID tag.
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公开(公告)号：WO2005091013B1
公开(公告)日：2005-11-24
申请号：PCT/US2005008862
申请日：2005-03-16
Applicant: SYMBOL TECHNOLOGIES INC , BRIDGELALL RAJ , DURON MARK WILLIAM , STRZELCZYK MARTIN J
Inventor： BRIDGELALL RAJ , DURON MARK WILLIAM , STRZELCZYK MARTIN J
CPC classification number: G01S5/14 , G01S13/46 , G01S13/74 , G01S13/878 , G01S2013/466
Abstract: A multi-resolution object location system and method for locating objects is provided. The multi-resolution system and method uses a long-range object locator together with a more precise RFID locator to efficiently and accurately determine the location of objects that include an RFID tag. The long-range object locator has a relatively longer range and can cover a relatively large area to determine the general location of the object within the large area. The RFID locator has a relatively shorter range, but is able to locate the object more precisely. The object location system uses the long-range locator to first determine the general location of the object, and then the RFID locator is used to determine a more accurate location of the object. Thus, the multi-resolution object location system is able to provide both a long range location of objects over a large area and a precise location of objects.
Abstract translation: 提供了一种用于定位对象的多分辨率对象定位系统和方法。 多分辨率系统和方法使用远距离对象定位器以及更精确的RFID定位器来有效和准确地确定包含RFID标签的对象的位置。 远程对象定位器具有相对较长的范围，并且可以覆盖相对较大的区域以确定对象在大区域内的一般位置。 RFID定位器具有相对较短的范围，但是能够更准确地定位对象。 对象定位系统使用远程定位器来首先确定对象的一般位置，然后使用RFID定位器来确定对象的更准确的位置。 因此，多分辨率对象定位系统能够在大面积上提供对象的远距离位置和物体的精确位置。
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