Ultrahigh frequency RFID label accurate positioning method based on label coupling effect

Abstract

The invention discloses an ultrahigh frequency RFID label accurate positioning method based on a label coupling effect; based on existing business protocols, the method can use a business RFID deviceand a single antenna to accurately position a target label without pre-training a database. The method comprises the following steps: studying an antenna design mode of RFID labels, building an equivalent circuit and modeling a label coupling effect, and designing to obtain a reasonable interference label pair under theory support; enabling a RFID reader to work under a fixed frequency mode, moving the interference label pair, tracking influences on the target label RSS by the interference label pair, and accurately positioning the target label via signal processing and iteration positioning.The positioning method only needs one RFID antenna and a RFID label group to finish accurate positioning, includes absolute positioning and relative positioning, and is low in cost and high in precision.

Description

technical field [0001] The invention belongs to the field of radio frequency identification, and in particular relates to an ultra-high frequency RFID tag precise positioning method based on tag coupling. Background technique [0002] At present, target positioning is widely used in many fields, especially precise positioning is very important. It plays a prominent role in many applications. For example, the robot arm in the industrial system needs to perform precise movements during work, including grasping, lifting and other actions. Only by accurately determining the position of the operation target can the task be successfully performed. There are three main types of existing positioning methods: based on computer vision, based on GPS, and based on radio frequency signals. [0003] Computer vision-based technology mainly uses cameras or infrared sensors to obtain high-resolution position information of target objects, and uses planning and control algorithms to determin...

AI Technical Summary

Problems solved by technology

The main disadvantage of this technology is that the GPS signal will be attenuated indoors due to the influence of buildings, resulting in low positioning accuracy, and the equipment cost of the locator is very expensive

The main disadvantage of this solution is that the signal processing is too complicated, the equipment cost is high, and the deployment difficulty is increased.

[0004] To sum up, the currently commonly used positioning technologies either have strict requirements on the environment, or need to rely on special equipment or complex algorithms

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