WO2017185588A1

WO2017185588A1 - Positioning system and method

Info

Publication number: WO2017185588A1
Application number: PCT/CN2016/098843
Authority: WO
Inventors: 王锐; 赵阳; 钱学雷
Original assignee: 王锐; 赵阳; 钱学雷
Priority date: 2016-04-28
Filing date: 2016-09-13
Publication date: 2017-11-02
Also published as: CN105976000A

Abstract

A positioning system and method are provided. The positioning system comprises a positioning device and a wearable RFID reader and writer. The positioning device is composed of a positioning unit or a plurality of positioning units connected with each other, one or more RFID tags being arranged in the positioning unit. The RFID tag is in one-to-one correspondence to three-dimensional spatial coordinates in a positioning space. The wearable RFID reader and writer comprise a reader and writer body and a fixed unit, wherein the reader and writer body performs read and write operations on the RFID tag, and the fixing unit is connected with the reader and writer body so as to fix the reader and writer body in a wearable manner. Also disclosed is a method of positioning using a positioning system. Spatial positioning is achieved through the RFID tags arranged in the positioning device and the wearable RFID reader and writer, which is less affected by the environment, easy and flexible to install, and has high positioning accuracy and low cost.

Description

Positioning system and method

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201610279792.X filed on Apr. 28, 2016, the disclosure of which is hereby incorporated by reference.

Technical field

The present invention relates to the field of spatial positioning technologies, and in particular, to a positioning system and method.

Background technique

With the development of society, the advancement of network and communication technology, graphic image processing technology and computer technology, Virtual Reality, a computer simulation system that can create and experience virtual worlds, has become more and more popular and become human. A new way of communication. The most important feature of virtual reality is that it has good interactivity and immersion. The main technology of interaction and immersion relies on high-precision spatial positioning, so as to provide users with a better experience of seamless integration.

At present, the spatial positioning technology mainly includes: various positioning technologies based on GNSS (Global Navigation Satellite System), radio frequency positioning technology based on RSSI (received signal strength), radio frequency positioning technology based on RSSI, and CV positioning technology.

1. GNSS-based positioning technologies include GPS in the United States, GLONASS in Russia, GALILEO in the European Union, and Beidou in China. Due to the limited accuracy of GNSS itself, the delay is large, and later developed RTK, differential positioning and other technologies. These GNSS-based positioning technologies are widely used, but due to the poor penetration of satellite signals, they are almost zero. Therefore, in the densely populated areas, the positioning accuracy is greatly affected, and it is difficult to accurately locate indoors.

2. The representative technology in the RF-based positioning technology that is not based on RSSI is UWB positioning. UWB positioning is triangulation using TOA, TDOA, AOA, etc., which is basically understandable. In order to apply GNSS positioning technology to the interior, some known location points or fixed facilities are used as known location markers. The positioning accuracy of this kind of positioning technology is about 5CM in the ideal experimental environment. However, in practical application scenarios with complex environments, the accuracy is often much lower, because the complexity of the scene and the crowds will have a great impact on the signal, such as Multipath effect, which makes the positioning accuracy seriously reduced.

3. The RSSI-based radio frequency positioning technology currently includes WiFi positioning technology, Bluetooth positioning technology and Apple's iBeacon positioning technology. These techniques are based on the inverse of RSSI and distance, that is, the closer the base station (such as a WiFi access point), the higher the RSSI and the smaller the RSSI. However, there are countless factors that cause RSSI changes in practical application scenarios, including obstacle occlusion, polarization direction of wireless signals, antenna anisotropy, and so on. Through this kind of technology, we can only judge whether the target object is within the signal coverage, and can not accurately determine the specific location information of the target object.

4, CV positioning technology, although this type of technology has high precision, but the positioning cost is high, and if a plurality of target objects move or exist at the same time in a positioning area, the positioning accuracy will drop sharply, and has the disadvantage of weak ID, that is, There may be some phenomena in the target object that some or all of the target objects cannot recognize the positioning.

Radio Frequency Identification (RFID) has gradually evolved into an automatic identification technology since the 1980s. It automatically recognizes target objects and acquires relevant data through RF signals. The identification work does not require manual intervention, and it can recognize high-speed motion. The object can identify multiple RFID tags, which is convenient and quick to operate. It is widely used in many fields such as Internet of Things, virtual reality, identity recognition, and production monitoring.

Summary of the invention

In order to solve the above problems in the prior art, the present invention provides a positioning system and method, which utilizes radio frequency identification technology to achieve positioning. Specifically, the positioning system includes a positioning device and a wearable RFID reader. The positioning device is composed of a positioning unit or is composed of a plurality of positioning units. One or more RFID tags are disposed in the positioning unit, and the positioning device is installed in an indoor or outdoor environment according to actual application requirements. On the entity of the fixed positioning unit, the RFID tag can be recognized by the RFID reader on the body to realize the mobile positioning. The invention is less affected by the environment, convenient and flexible to install, high in positioning accuracy and low in cost.

According to an aspect of the present invention, a positioning system is provided, the positioning system comprising a positioning device and a wearable RFID reader, wherein:

The positioning device is composed of a positioning unit or a plurality of positioning unit connections, wherein:

One or more radio frequency identification (RFID) tags are disposed in the positioning unit;

The RFID tag has a one-to-one correspondence with three-dimensional space coordinates in the positioning space;

The wearable RFID reader includes: a reader body and a fixing unit, wherein:

The reader/writer body performs a read and write operation on the RFID tag;

The fixing unit is connected to the reader/writer body to wearably fix the reader/writer body.

Optionally, when the positioning device is composed of a plurality of positioning unit connections, the positioning unit is provided with a connecting member.

Optionally, the positioning unit is made of a non-metallic material; the fixing unit is made of a flexible non-metallic material or made of a non-flexible non-metal material.

Optionally, the RFID tag has unique identification information, and the identification information has a one-to-one correspondence with three-dimensional space coordinates.

Optionally, the RFID tag is a medium frequency/ultra high frequency RFID tag.

Optionally, the fixing unit is physically connected to the reader/writer body through a connector or is made as an embedded connection.

Optionally, the reader/writer body comprises: an antenna unit, a radio frequency signal processing unit, a processor, a communication unit, and a power supply unit, wherein:

The antenna unit is connected to the radio frequency signal processing unit;

The radio frequency signal processing unit is connected to the antenna unit and the processor;

The communication unit is connected to the processor;

The power output end of the power supply unit is connected to the power input terminals of the radio frequency signal processing unit, the processor, and the communication unit.

Optionally, the radio frequency signal processing unit further includes a filter; the processor includes a data processing chip and a packaging unit.

According to another aspect of the present invention, there is also provided a method of positioning using the positioning system, the method comprising the steps of:

Establishing a one-to-one correspondence between the RFID tags in the positioning device laid in the positioning space and the spatial information of the positioning space;

The wearable RFID reader reads the RFID tag data of the location of the target object, and obtains the three-dimensional coordinate information corresponding to the RFID tag according to the correspondence between the identifier information and the three-dimensional space coordinates;

The RFID tag data read by the wearable RFID reader in a predetermined period of time is counted, and the spatial position information of the target object at the next moment is predicted.

Optionally, the step of reading, by the wearable RFID reader, the RFID tag data of the location of the target object further comprises filtering, by the wearable RFID reader, the plurality of RFID tag data read at the same time. step.

The invention provides one or more RFID tags in the positioning unit of the positioning device, and establishes unique identification information corresponding to the three-dimensional space coordinates of the RFID tags, and the target object is performed in a space formed or covered by the positioning device. When moving, the spatial position coordinate information of the target object can be determined according to the content of the RFID tag read by the RFID reader/writer worn on the body to realize the mobile positioning. The positioning device of the above positioning system proposed by the invention can be conveniently installed in the space where the target object is located, and the wearable RFID reader can be conveniently worn on the human body, because the positioning device uses the inexpensive RFID tag, The overall input cost is low. In addition, users can flexibly choose the number and method of RFID tag installation according to positioning accuracy and cost requirements, such as dense installation or sparse installation, which can meet the different needs of users and better solve the positioning accuracy and The contradiction between positioning costs.

DRAWINGS

1 is a block diagram showing the structure of a positioning system according to an embodiment of the present invention;

2 is a block diagram showing the structure of a positioning device according to an embodiment of the present invention;

3 is a schematic structural diagram of a positioning unit according to an embodiment of the invention;

4 is a schematic diagram of connection of a positioning unit according to an embodiment of the invention;

FIG. 5 is a structural block diagram of a wearable RFID reader/writer according to an embodiment of the invention; FIG.

6 is a flow chart of a positioning method in accordance with an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the specific embodiments of the invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

According to an aspect of the present invention, a positioning system is provided, as shown in FIG. 1, the positioning system includes a positioning device and a wearable RFID reader, wherein:

The RFID tag has a one-to-one correspondence with three-dimensional space coordinates;

The wearable RFID reader includes: a reader body and a fixing unit, wherein:

The reader/writer body performs a read and write operation on the RFID tag;

The fixing unit is coupled to the reader/writer body to wearably fix the reader/writer body, the fixing unit being such that when the reader/writer body or the wearable RFID reader is worn When a certain part of the body is used, it can effectively read and write the RFID tag, and ensure that the read/write performance of the reader body is not affected by the movement of the wearing part.

Wherein, the positioning device can be placed independently at a certain place, or can be laid/arranged/fixed to the attached object, and the specific installation manner depends on the specific application needs, such as laying on the floor and fixing on the wall or the ceiling. It can also be placed on a table, fixed on items such as goods, and so on. The positioning device can form a space or cover a space. When the target object, that is, the object to be positioned, moves in the space, the spatial position of the target object can be determined by reading the relevant RFID tag information through the RFID reader/writer. Thereby achieving precise positioning.

Wherein, the positioning unit is a solid unit having a certain length, width, thickness or other internal or surface where the RFID tag can be placed. The positioning unit may present a regular shape, such as a square, a rectangle or a circle, or may also have an irregular shape. In order to facilitate the laying of the positioning device in the positioning space and the rational and rational use of the material, the positioning unit can be flexibly selected. The shape of the unit. However, regardless of the shape of the positioning unit, when a plurality of positioning units are used to form the positioning device, the positioning unit needs to be provided with a connecting member, such as a card slot, a buckle, and a connecting buckle at the edge of the positioning unit or near the edge. The connector is connected to fix the relative position between the positioning units or the relative position between the positioning unit and the attached object. It should be noted that the shape of the above positioning unit is merely an exemplary description, and is not intended to limit the present invention. Any reasonable and manufacturable positioning unit shape falls within the protection scope of the present invention.

The positioning unit is made of a non-metallic material or mainly made of a non-metallic material such as polycarbonate, polyvinyl chloride or the like. Of course, the manufacturing material of the positioning unit can be selected according to the installation position of the positioning unit. For example, when the positioning unit is used as a floor, a pressure-resistant non-metal material can be selected, when the positioning unit is used as a ceiling or mounted on a wall. When you are on, you can choose lightweight non-metallic materials and so on.

Each of the RFID tags has a unique identification information, which can ensure that each RFID tag is unique in the space required for positioning, and there is a one-to-one correspondence between the identification information and the three-dimensional space coordinates. relationship. For example, the identification information may include one or more of EPC ID information of the RFID tag, a serial number of the positioning unit where the RFID tag is located, and a serial number of the RFID tag in the positioning unit. Of course, the identification information may also be other information as long as it can uniquely distinguish a plurality of RFID tags in the same positioning space. The identification information can be established by an editing tool, which can edit and set the positioning unit serial number of the RFID tag and the serial number of the RFID tag in the positioning unit.

The RFID tag can be installed on the inside or the surface of the positioning unit. In practical applications, the installation position of the RFID tag can be selected according to actual needs and the installation position of the positioning device, for example, if the positioning device is laid on the floor. In order to protect the RFID tag and extend its service life, the RFID tag may be installed inside the positioning unit; if the positioning device is installed on a wall or a ceiling, since the RFID tag does not need to bear weight, in order to Increasing the recognition distance of the RFID tag and increasing the degree of recognition thereof, the RFID tag may be optionally disposed on the surface of the positioning unit, in which case, in order to protect the RFID tag, the The outer surface of the RFID tag or the surface of the positioning unit on which the RFID tag is attached is sheathed with a protective layer which can be made of a pressure resistant material. It should be noted that the mounting position of the above RFID tag is merely an exemplary description, and is not intended to limit the present invention. Any reasonable and manufacturable mounting position falls within the protection scope of the present invention.

The RFID tag may be any suitable size or size of RFID tag, and the identification range of one or more RFID tags of the positioning unit may completely cover or partially cover the positioning device. In an embodiment of the invention, the RFID tag is a medium-high frequency/ultra-high frequency RFID tag or a medium-high frequency/ultra-high frequency passive RFID tag. It can be understood that the working frequency of the medium-high frequency RFID tag is 3 MHz. At 30MHz, UHF RFID tags operate at frequencies from 860MHz to 960MHz. In a preferred embodiment of the present invention, a 13.54 MHz high frequency passive RFID tag or a 866 MHz/902 MHz UHF passive RFID tag is adopted. These passive RFID tags are less affected by environmental factors, have low cost, and are highly resistant to interference. long lasting. Of course, in practical applications, medium-high frequency or ultra-high frequency RFID tags of other working frequencies can be used according to actual needs. It should be noted that the dimensions and specifications of the above RFID tags are merely exemplary and are not intended to limit the present invention. Any reasonable and achievable RFID tag size and specifications fall within the scope of the present invention.

The RFID tag may be uniformly distributed in the positioning unit, or may be non-uniformly distributed. It can be understood that the uniform distribution refers to the same distance between each RFID tag in the positioning unit, and the non-uniform distribution It means that the distance between each RFID tag in the positioning unit is not the same or not exactly the same. The selection of the RFID tag distribution mode is related to the positioning accuracy and the positioning cost requirement. In order to make the coverage of the RFID tag have no blind zone and achieve all-round seamless high-precision positioning, the uniform distribution mode is usually selected; but in practical applications, In some areas, the coverage of RFID tags may not be needed. In the case that the accuracy requirements can be met, in order to reduce the cost, a non-uniform distribution mode may be selected, and even a distribution mode may be customized according to the actual application requirements of the user. Of course, the arrangement distance between the RFID tags can also be determined according to the required positioning effect and accuracy. Generally, the distance between the RFID tags does not exceed 1 m, and preferably, the distance between the RFID tags is greater than Its size is 3 times. It should be noted that the distribution manner of the above RFID tag is merely an exemplary description, and is not intended to limit the present invention. Any reasonable and achievable distribution manner of the RFID tag falls within the protection scope of the present invention.

The positioning device of the present invention will be further described below by taking a positioning device composed of a plurality of positioning unit connections as an example.

2 is a schematic structural view of a positioning device according to an embodiment of the present invention. As shown in FIG. 2, the positioning device 1 is composed of a plurality of positioning units 11. In the embodiment, the positioning unit 11 adopts a rectangular shape. A regular shape.

3 is a schematic structural diagram of the positioning unit 11 in the embodiment. As shown in FIG. 3, in the interior of the positioning unit 11, the RFID tags 12 are arranged in a non-uniform distribution manner. In this embodiment, between each RFID tag 12 The distance is greater than 1.5 times the size of the RFID tag.

The RFID tag 12 in the positioning unit 11 is edited by the editing tool with unique editing information, and the unique identification information and the spatial position information of the positioning unit 11 where the RFID tag 12 is located and the position of the RFID tag 12 in the positioning unit 11 The information is associated one by one so that the corresponding unique spatial position information of the RFID tag 12 in the positioning device 1 can be determined.

In this embodiment, the positioning unit 11 is made by heating and pressing a polyvinyl chloride material.

Referring to FIG. 4, in the embodiment, the positioning unit 11 is formed by a seamless splicing method, and in FIG. 4, a and b respectively represent two adjacent positioning units.

FIG. 5 is a structural block diagram of a wearable RFID reader/writer according to an embodiment of the present invention. As shown in FIG. 5, the wearable RFID reader/writer 2 includes a reader/writer body 21 and a fixing unit 22, wherein:

The reader/writer body 21 is a core component of the wearable RFID reader/writer, and includes an antenna unit 211, a radio frequency signal processing unit 212, a processor 213, a communication unit 214, and a power supply unit 215, where:

The antenna unit 211 is connected to the radio frequency signal processing unit 212, and is mainly responsible for receiving the frequency signal matched by the radio frequency signal processing unit 212 and matching the RFID tag, and modulating and demodulating the received RFID tag data. And processed RFID The tag data is sent to the radio frequency signal processing unit 212. Based on the antenna unit 211, the wearable RFID reader/writer can transmit a signal matching the frequency band of the RFID tag that needs to be recognized and read, thereby reading the data content in the RFID tag. The antenna used by the antenna unit 211 may be a flexible antenna or a non-flexible antenna as long as the antenna is not damaged by wearing. In an embodiment of the invention, in order to more suitably wear and protect the antenna, it is preferred to use a flexible antenna for signal transmission and reception. The frequency band of the signal transmitted by the antenna unit 211 may be a medium-high frequency band or an ultra-high frequency band. It can be understood that the frequency range of the medium-high frequency band is 3 MHz to 30 MHz, and the frequency range of the ultra-high frequency band is 860 MHz to 960 MHz. Preferably, an ultra-high frequency band of 860 MHz to 960 MHz is selected.

The radio frequency signal processing unit 212 is connected to the antenna unit 211 and the processor 213, and the radio frequency signal processing unit 212 is configured to process the frequency band signal transmitted by the antenna unit 213 and the RFID tag data received by the antenna unit 211, such as Activating an RFID tag by the antenna unit 213, acquiring information stored in the RFID tag, writing information to the RFID tag, and performing multi-signal processing on a plurality of RFID tags read by the reader at a time, such as group read collision avoidance (when there is When multiple RFID tags are in the measurable range, how to read and process multiple RFID tags separately to avoid interference). In an embodiment of the invention, the radio frequency signal processing unit 212 further includes a filter for performing filtering processing on the plurality of RFID tag data when the reader/writer reads the plurality of RFID tag data at a time to obtain a high Accuracy and high accuracy of RFID tag data.

Preferably, the radio frequency signal processing unit 212 employs a chip processor that can process ultra-high band signals.

Those skilled in the art can understand that the RFID tag is passive and needs to be powered by the card reader. The RF signal processing unit 212 can transmit energy to the RFID tag through the antenna, and then the RFID tag is activated, starts and reads the card. The device communicates through the antenna. The basic goal of this communication is to obtain information stored on an RFID tag or to write information to an RFID tag. However, the specific acquisition process depends on different standards, such as the UHF standard of EPCglobal 2, or other standards.

The processor 213 is mainly responsible for processing the RFID tag data received by the radio frequency signal processing unit 212 and the antenna unit 211, and the RFID tag data is in accordance with the communication unit. The data format supported by 214 is required to be encapsulated, and a command to transmit data is transmitted to the communication unit 214, thereby transmitting the RFID tag data obtained from the antenna unit 211 to the other communication device through the communication unit 214.

The processor 213 has a data input end, a data output end, a communication input end and a communication output end, wherein the data input end is connected to the radio frequency signal processing unit 212 to receive the RFID tag data through the radio frequency signal processing unit 212 and the antenna unit 213. The data output terminal is connected to the communication unit 214 to perform RFID signal processing on the RFID tag data obtained from the RF signal processing unit 212 and the antenna unit 213, packaged according to the data format supported by the communication unit 214, and then issued to the communication unit 214. A command to transmit data to transmit RFID tag data obtained from the radio frequency signal processing unit 212 and the antenna unit 213 through the communication unit 214; the communication input terminal is connected to the communication unit 214 to receive read data or write sent by the external device The communication information of the data is connected to the radio frequency signal processing unit 212 to cause the antenna unit 211 to transmit a signal of a certain frequency according to the received communication information by the radio frequency signal processing unit 212, thereby activating the RFID tag to be read.

The processor 213 includes at least a data processing chip and a packaging unit, and the data processing chip is configured to process the RFID tag data received by the radio frequency signal processing unit 212 and the antenna unit 211; The RFID tag data processed by the data processing chip is packaged according to the data format supported by the communication unit 214. The communication unit 214 is connected to the processor 213, and is mainly responsible for performing real-time communication between the wearable RFID reader and the external device such as a PC end or a mobile device, thereby processing the RFID tag processed by the processor 213. The data is sent to an external device for further analysis processing or application.

The communication unit 214 includes at least a communication chip, and the communication chip may be a wired communication chip or a wireless communication chip. The wireless communication chip may be a remote wireless communication chip or a near field wireless communication chip. The communication chip may be a communication chip supported by mobile communication technology, such as a GPRS communication chip, a 2G communication chip, a 3G communication chip, a 4G communication chip, or the like, or a combination of multiple wireless communication chips; the near field communication chip may be Bluetooth A communication chip, an infrared communication chip, a WIFI communication chip, a sensor communication chip, a beacon communication chip, or the like, or a combination of a plurality of near field communication chips. Need special It should be noted that the above communication chip is only an exemplary description and is not intended to limit the present invention. Any component that can realize remote and near field communication falls within the protection scope of the present invention. In an embodiment of the present invention, a WIFI communication chip is used for real-time communication and data transmission with an external device, so that a later data processing device, such as a computer, can further process the RFID tag data content obtained by the wearable RFID reader/writer. And analysis.

The power output of the power supply unit 215 is connected to the power input terminals of the radio frequency signal processing unit 212, the processor 213, and the communication unit 214 to provide power for the radio frequency signal processing unit 212, the processor 213, and the communication unit 214.

The power supply unit 215 can be a lithium battery, a polymer battery, a battery, a solar battery, or a combination of the above batteries. In an embodiment of the invention, the power supply unit 215 is a polymer battery to alleviate the wearable RFID. The weight of the reader.

The fixing unit 22 is made of or mainly made of a non-metallic material such as plastic, rubber, textile material or the like. Further, the fixing unit 22 may be made of a flexible non-metal material or a non-flexible non-metal material, and the specific material selection depends on the wearing part of the wearable RFID reader, such as the fixing unit 22 . It can be made into a rubber foot cover, which can be made into a cloth bracelet armband, a flexible collar, a knitted glove, or even a portable device that can be clamped on a certain part of the human body or clothing. The user can also according to the needs of practical applications. Customized ergonomic implementations.

The fixing unit 22 and the reader/writer body 21 can be connected in various ways, such as physical connection through a connector or directly into an embedded connection, for example, the reader body 21 can be fixed to the fixing by a connector. On the surface or one side of the unit 22, the fixing unit 22 may be formed in a ring shape, and the reader/writer body 21 may be embedded or dispersedly embedded in the fixing unit 22, where the distributed embedded means that the reader/writer body 21 is The individual units are independently embedded in the fixed unit 22, such as embedding the flexible antenna unit in a position where the risk of damage is high, embedding the non-flexible processor, the power supply unit, and the communication unit into a position where the risk of damage is small, It protects, of course, even if the flexible antenna unit is not easily damaged, its deformation will adversely affect the transceiving performance, so the antenna unit can also be placed together with other units at a position where the risk of damage is small. It should be particularly noted that the connection manner of the fixing unit 22 and the reader/writer body 21 is merely an exemplary description, and is not intended to limit the present invention. Any achievable and reasonable connection and connection components are within the scope of the present invention.

According to another aspect of the present invention, a method for positioning using the positioning system is also proposed. As shown in FIG. 6, the method includes the following steps:

Step S1: establishing a one-to-one correspondence between the RFID tags in the positioning device laid in the positioning space and the spatial information of the positioning space;

Each RFID tag has a unique identification information that ensures that each RFID tag is unique in the space of the desired location, and that there is a one-to-one correspondence between the identification information and the three-dimensional space coordinates.

In an embodiment of the present invention, the RFID tag in the positioning unit can be edited by the editing tool installed on the PC, and the unique identification information and the spatial location information of the positioning unit where the RFID tag is located and the RFID can be The position information of the tag in the positioning unit is associated with each other, so that the unique spatial position information of the RFID tag in the positioning device can be determined.

Step S2: The wearable RFID reader reads the RFID tag data of the location of the target object, and obtains the three-dimensional coordinate information corresponding to the RFID tag according to the correspondence between the identifier information and the three-dimensional space coordinates;

In this step, the wearable RFID reader/writer transmits the obtained RFID tag data to an external device such as a PC, and obtains the RFID tag according to the correspondence between the identification information set by the external device such as the PC and the three-dimensional space coordinates. 3D space coordinate information.

The step S2 further includes the step of filtering the plurality of RFID tag data read by the wearable RFID reader at the same time to obtain high-precision and high-accuracy RFID tag data, thereby obtaining an accurate target object. Spatial location information.

The signal frequency band emitted by the wearable RFID reader can be a medium-high frequency band or an ultra-high frequency band.

Step S3: performing statistics on the RFID tag data read by the wearable RFID reader in a predetermined period of time, and predicting the spatial location information of the target object at the next moment, so that the location information of the new target object is received and Only fine-tuning is required for display, which greatly enhances the real-time performance of the human-computer interaction system.

The preset time period may be the current time determined according to the needs of the actual application. A certain time period before.

The method for performing statistics on the RFID tag information and predicting the spatial location information of the target object at the next moment may be selected by a person skilled in the art according to actual application requirements, and is not described herein or specifically limited.

In summary, the positioning device of the present invention realizes positioning by installing one or more RFID tags in the positioning unit and establishing unique identification information corresponding to the three-dimensional coordinates of the RFID tags, and the target object is located at the positioning device. When moving in the space formed or covered, the spatial position coordinate information of the target object can be determined according to the content of the RFID tag read by the RFID reader/writer worn on the body, thereby achieving accurate positioning.

The specific embodiments of the present invention have been described in detail, and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A positioning system, characterized in that the positioning system comprises a positioning device and a wearable RFID reader, wherein:

The positioning device is composed of a positioning unit or a plurality of positioning unit connections, wherein:

One or more radio frequency identification (RFID) tags are disposed in the positioning unit;

The RFID tag has a one-to-one correspondence with three-dimensional space coordinates in the positioning space;

The wearable RFID reader includes: a reader body and a fixing unit, wherein:

The reader/writer body performs a read and write operation on the RFID tag;

The fixing unit is connected to the reader/writer body to wearably fix the reader/writer body.
The positioning system according to claim 1, wherein when the positioning device is composed of a plurality of positioning unit connections, the positioning unit is provided with a connecting member.
The positioning system according to claim 1, wherein the positioning unit is made of a non-metallic material; the fixing unit is made of a flexible non-metallic material or made of a non-flexible non-metal material.
The positioning system according to claim 1, wherein said RFID tag has unique identification information, said identification information being in one-to-one correspondence with three-dimensional space coordinates.
The positioning system of claim 1 wherein said RFID tag is a mid-high frequency/ultra-high frequency RFID tag.
The positioning system according to claim 1, wherein the fixing unit and the reader/writer body are physically connected or fabricated as an embedded connection through a connector.
The positioning system according to claim 1, wherein the reader/writer body comprises: an antenna unit, a radio frequency signal processing unit, a processor, a communication unit, and a power supply unit, wherein:

The antenna unit is connected to the radio frequency signal processing unit;

The radio frequency signal processing unit is connected to the antenna unit and the processor;

The communication unit is connected to the processor;

The power output end of the power supply unit is connected to the power input terminals of the radio frequency signal processing unit, the processor, and the communication unit.
The positioning system according to claim 7, wherein said radio frequency signal processing unit further comprises a filter; said processor comprising a data processing chip and a packaging unit.
A method for positioning using the positioning system of claim 1, wherein the method comprises the following steps:

Establishing a one-to-one correspondence between the RFID tags in the positioning device laid in the positioning space and the spatial information of the positioning space;

The wearable RFID reader reads the RFID tag data of the location of the target object, and obtains the three-dimensional coordinate information corresponding to the RFID tag according to the correspondence between the identifier information and the three-dimensional space coordinates;

The RFID tag data read by the wearable RFID reader in a predetermined period of time is counted, and the spatial position information of the target object at the next moment is predicted.
The method according to claim 9, wherein the step of reading, by the wearable RFID reader, the RFID tag data of the location of the target object further comprises reading the same time for the wearable RFID reader The step of filtering the plurality of RFID tag data.