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System and method for determining location

一种位置值、最终位置的技术，应用在无线电波测量系统、定位、测量装置等方向，能够解决信号不能测量、信号到达时间增大、发送信号延迟等问题

Inactive Publication Date: 2012-09-19
LSIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These problems will delay the signal sent by the tag that must be measured, or attenuate the signal itself, making it impossible to measure the arrival time of the signal or increase its error

Method used

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  • System and method for determining location
  • System and method for determining location
  • System and method for determining location

Examples

Experimental program
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Embodiment Construction

[0040] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0041] As used herein, the terms "position" and "position" are used interchangeably. As used herein, the terms "correlation" and "correlation value" are used interchangeably.

[0042] The core idea of ​​the present invention is to group multiple readers, each group includes three readers, to calculate the correlation and correlation standard deviation between the tag information signal re...

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PUM

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Abstract

The present invention introduces a location determining system. The location determining system includes a reader array and a location determining engine server. The reader array includes a plurality of reader groups, where each group includes three readers that each receives a tag information signal transmitted from the tag, generates a PN code generated from inside, correlation and standard deviation of the correlation, and bypasses the tag information signal, in a case a ratio of correlation and standard deviation of the correlation is greater than a predetermined critical value. The location determining engine server determines a final location value relative to the tag, using the tag information signal having a time difference of tag information signals received from the three readers forming each reader group among the tag information signals bypassed by the plurality of reader groups smaller than a predetermined marginal time difference. The invention also discloses a method used for determining position.

Description

technical field [0001] The present invention relates to a position (orientation) system, and more particularly, the present invention relates to a system and method for position (orientation) determination configured to minimize measurement errors of tag positions. Background technique [0002] In a 2.4GHz real-time location system (RTLS) according to the ISO / IEC 24730-2 international standard, a tag transmits a tag signal at a predetermined cycle, and the time difference of arrival (TDOA) of the tag signal to multiple readers is calculated to estimate the tag position. For this, at least three readers must receive the signal sent by the tag. [0003] figure 1 The tag signal sent by the tag is shown. [0004] refer to figure 1 , the tag repeatedly sends a flash signal, a DSSS (Direct Sequence Spread Spectrum) containing the tag ID (identification), or a sub-flash signal containing the same data. Although in figure 1 It is not shown in , but the flash signal or sub flash...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/285G06K7/00
CPCG01S5/0221G01S7/285G06K7/00G01S5/06G01S5/02213H04W64/00G01S5/021
Inventor 金宰郁
Owner LSIS CO LTD