CN103279780A - RFID article positioning device based on RSSI weighing algorithm - Google Patents
RFID article positioning device based on RSSI weighing algorithmDownload PDFInfo
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及通讯技术领域，特别是涉及一种基于RSSI加权算法的RFID物品定位装置。The invention relates to the technical field of communication, in particular to an RFID article positioning device based on an RSSI weighting algorithm.
背景技术Background technique
随着经济的发展和人们生活水平的提高，人们的日常出行越来越频繁，私人财产越来越贵重，但被窃丢失现象也日益严重。With the development of the economy and the improvement of people's living standards, people's daily travels are becoming more and more frequent, and private property is becoming more and more valuable, but the phenomenon of theft and loss is also becoming more and more serious.
近年来无线传感技术发展迅猛，为人员及物品的身份识别、精确定位奠定了技术基础，利用多种无线传感技术并结合电子信息技术可帮助人们在资产监控管理、智能决策等应用方面提供信息基础。比如日趋成熟的射频自动识别(RFID) 传感技术，就是利用射频信号通过空间耦合( 交变磁场或电磁场) 实现无接触信息传递并通过所传递的信息达到识别目的的技术，该技术目前已广泛应用于人员身份、设备资源的自动识别和信息共享。RSSI(Received Signal Strength Indication接收的信号强度指示)加权算法是无线信号测距最简单有效的方法，已经广泛应用于实践。In recent years, the rapid development of wireless sensing technology has laid a technical foundation for the identification and precise positioning of personnel and objects. Using a variety of wireless sensing technologies combined with electronic information technology can help people provide information in asset monitoring management, intelligent decision-making and other applications. information base. For example, the increasingly mature radio frequency automatic identification (RFID) sensing technology is a technology that uses radio frequency signals to achieve non-contact information transmission through spatial coupling (alternating magnetic field or electromagnetic field) and achieves identification purposes through the transmitted information. This technology has been widely used at present. It is applied to the automatic identification and information sharing of personnel identity and equipment resources. The RSSI (Received Signal Strength Indication) weighting algorithm is the simplest and most effective method for wireless signal ranging and has been widely used in practice.
然而，目前无线传感技术还主要应用于工业、医疗、交通、农牧业等领域，由于RFID定位距离有限，从而精度不高，所以仅仅依靠RFID技术应用于个人生活领域如个人物品管理方面不能满足大众需求。However, at present, wireless sensing technology is mainly used in the fields of industry, medical care, transportation, agriculture and animal husbandry. Due to the limited positioning distance of RFID, the accuracy is not high. Meet the needs of the public.
发明内容Contents of the invention
为了克服现有技术的不足，本发明提供一种基于RSSI加权算法的RFID物品定位装置。In order to overcome the deficiencies of the prior art, the present invention provides an RFID article positioning device based on an RSSI weighting algorithm.
本发明的技术方案是：Technical scheme of the present invention is:
一种基于RSSI加权算法的RFID物品定位装置，包括无源RFID标签、有源RFID标签、固定式RFID读写器、手持式物品定位装置和辅助定位管理平台，无源RFID标签和有源RFID标签分别通过射频信号连接固定式RFID读写器和手持式物品定位装置，辅助定位管理平台分别连接固定式RFID读写器和手持式物品定位装置。An RFID item positioning device based on RSSI weighting algorithm, including passive RFID tags, active RFID tags, fixed RFID readers, handheld item positioning devices and auxiliary positioning management platforms, passive RFID tags and active RFID tags The fixed RFID reader-writer and the handheld item positioning device are respectively connected through radio frequency signals, and the auxiliary positioning management platform is respectively connected to the fixed RFID reader-writer and the handheld item positioning device.
所述手持式物品定位装置包括微控制器、RFID读写器、无线收发单元、人机交互单元和目标物体位置接近指示单元，微控制器分别连接RFID读写器、无线收发单元、人机交互单元和目标物体位置接近指示单元。The handheld article positioning device includes a microcontroller, an RFID reader, a wireless transceiver unit, a human-computer interaction unit, and a target object position proximity indication unit, and the microcontroller is connected to the RFID reader, the wireless transceiver unit, the human-computer interaction The position of the unit and the target object is close to the indication unit.
所述目标物体位置接近指示单元包括红色LED灯和绿色LED灯。The target object position proximity indicating unit includes a red LED light and a green LED light.
所述人机交互单元包括触摸屏组件和语音输入输出模块。The human-computer interaction unit includes a touch screen component and a voice input and output module.
所述手持式物品定位装置还包括USB接口和本地地图数据库，USB接口和本地地图数据库分别连接微控制器。The handheld object positioning device also includes a USB interface and a local map database, and the USB interface and the local map database are respectively connected to a microcontroller.
所述手持式物品定位装置还包括RSSI加权算法单元，RSSI加权算法单元连接微控制器。The handheld object positioning device also includes an RSSI weighting algorithm unit connected to a microcontroller.
所述固定式RFID读写器包括天线、RFID读写器芯片、微控制器和通信接口，天线、RFID读写器芯片、微控制器和通信接口依次顺序连接。The fixed RFID reader-writer includes an antenna, an RFID reader-writer chip, a microcontroller and a communication interface, and the antenna, the RFID reader-writer chip, the microcontroller and the communication interface are sequentially connected.
所述基于RSSI加权算法的RFID物品定位装置还包括地图生成单元，地图生成单元连接辅助定位管理平台。The RFID article positioning device based on the RSSI weighting algorithm also includes a map generating unit connected to an auxiliary positioning management platform.
所述地图生成单元包括摄像头组。The map generating unit includes a camera group.
本发明有如下积极效果：The present invention has following positive effect:
1、本发明中的RFID定位方式简单、有效；1. The RFID positioning method in the present invention is simple and effective;
2、本装置使用灵活，可以方便的修改不同标签所对应的物品信息；该装置也可以撕下标签或重新贴上新标签；2. The device is flexible to use and can easily modify the item information corresponding to different labels; the device can also tear off the label or re-attach a new label;
3、基于加权算法的RFID物品定位方式，定位的误差更小。3. The RFID item positioning method based on the weighted algorithm has smaller positioning errors.
附图说明Description of drawings
图1 是本发明的结构及工作原理方框图。Fig. 1 is a block diagram of structure and working principle of the present invention.
图2 是本发明的手持式物品定位装置的结构框图。Fig. 2 is a structural block diagram of the hand-held article positioning device of the present invention.
图3 是本发明的固定式RFID读写器的结构框图。Fig. 3 is the structural block diagram of fixed RFID reader-writer of the present invention.
具体实施方式Detailed ways
下面结合附图说明本发明。The present invention is illustrated below in conjunction with accompanying drawing.
一种基于RSSI加权算法的RFID物品定位装置，包括无源RFID标签、有源RFID标签、固定式RFID读写器、手持式物品定位装置和辅助定位管理平台，无源RFID标签和有源RFID标签分别通过射频信号连接固定式RFID读写器和手持式物品定位装置，辅助定位管理平台分别连接固定式RFID读写器和手持式物品定位装置。RFID定位使得该装置使用灵活，简单，关于RSSI加权算法的结合，使得定位更加准确。An RFID item positioning device based on RSSI weighting algorithm, including passive RFID tags, active RFID tags, fixed RFID readers, handheld item positioning devices and auxiliary positioning management platforms, passive RFID tags and active RFID tags The fixed RFID reader-writer and the handheld item positioning device are respectively connected through radio frequency signals, and the auxiliary positioning management platform is respectively connected to the fixed RFID reader-writer and the handheld item positioning device. RFID positioning makes the device flexible and simple to use, and the combination of RSSI weighting algorithm makes positioning more accurate.
我们可以将需要定位的物体上固定RFID标签，RFID标签分为无源RFID标签和有源RFID标签，无源RFID标签体积小更加灵活，有源RFID标签虽然体积稍大，但是定位更加准确，我们针对不同的需要定位的物体自由选择RFID标签。We can fix RFID tags on objects that need to be positioned. RFID tags are divided into passive RFID tags and active RFID tags. Passive RFID tags are smaller and more flexible. Although active RFID tags are slightly larger in size, their positioning is more accurate. We Freely choose RFID tags for different objects that need to be located.
需要定位的物体上固定RFID标签后，可以通过固定式RFID读写器不断阅读RFID标签，从而初步确定物体的大致方位和范围。然后再通过手持式物品定位装置仔细寻找具体位置。After the RFID tag is fixed on the object to be positioned, the RFID tag can be read continuously through the fixed RFID reader, so as to preliminarily determine the approximate orientation and range of the object. Then carefully search for the specific location through the hand-held object positioning device.
手持式物品定位装置包括微控制器、RFID读写器、无线收发单元、人机交互单元和目标物体位置接近指示单元，微控制器分别连接RFID读写器、无线收发单元、人机交互单元和目标物体位置接近指示单元。目标物体位置接近指示单元包括红色LED灯和绿色LED灯。可以通过设置LED亮红灯或绿灯，或者通过设置LED灯闪烁的频率来提示物品的位置信息。The handheld object positioning device includes a microcontroller, an RFID reader, a wireless transceiver unit, a human-computer interaction unit, and a target object position proximity indicator unit. The microcontroller is connected to the RFID reader, wireless transceiver unit, human-computer interaction unit and The target object position is close to the indication unit. The target object position proximity indication unit includes a red LED light and a green LED light. The location information of the item can be prompted by setting the LED to turn on red or green, or by setting the frequency at which the LED flashes.
人机交互单元包括触摸屏组件和语音输入输出模块。通过触摸屏组件和语音输入输出模块可以更加方便的进行设置和查找物品的位置。The human-computer interaction unit includes a touch screen component and a voice input and output module. It is more convenient to set up and find the location of the item through the touch screen component and the voice input and output module.
手持式物品定位装置还包括USB接口和本地地图数据库，USB接口和本地地图数据库分别连接微控制器。结合地图信息来指引定位物品，更加直观、高效。The handheld object positioning device also includes a USB interface and a local map database, and the USB interface and the local map database are respectively connected to a microcontroller. Combining map information to guide and locate items is more intuitive and efficient.
手持式物品定位装置还包括RSSI加权算法单元，RSSI加权算法单元连接微控制器。基于加权算法的RFID物品定位方式，定位的误差更小、定位速度更快。The hand-held object positioning device also includes an RSSI weighting algorithm unit, which is connected to a microcontroller. The RFID item positioning method based on weighted algorithm has smaller positioning error and faster positioning speed.
固定式RFID读写器包括天线、RFID读写器芯片、微控制器和通信接口，天线、RFID读写器芯片、微控制器和通信接口依次顺序连接。The fixed RFID reader-writer includes an antenna, an RFID reader-writer chip, a microcontroller and a communication interface, and the antenna, the RFID reader-writer chip, the microcontroller and the communication interface are sequentially connected.
基于RSSI加权算法的RFID物品定位装置还包括地图生成单元，地图生成单元连接辅助定位管理平台。其中地图生成单元包括摄像头组。地图生成单元的使用物主可以通过辅助定位管理平台直接查看所有物品位置，方便简单，不需要传统的翻找，一个个确认的方式。The RFID item positioning device based on the RSSI weighting algorithm also includes a map generation unit connected to the auxiliary positioning management platform. Wherein the map generating unit includes a camera group. The owner of the map generation unit can directly view the location of all items through the auxiliary positioning management platform, which is convenient and simple, and does not require the traditional way of rummaging and confirming one by one.
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