CN102879776B - Radio frequency identification distance measurement or positioning system and method thereof - Google Patents

Radio frequency identification distance measurement or positioning system and method thereof Download PDF

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CN102879776B
CN102879776B CN 201210360709 CN201210360709A CN102879776B CN 102879776 B CN102879776 B CN 102879776B CN 201210360709 CN201210360709 CN 201210360709 CN 201210360709 A CN201210360709 A CN 201210360709A CN 102879776 B CN102879776 B CN 102879776B
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reader
tag
module
radio frequency
time
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CN102879776A (en
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张学艳
刘振宇
朱坤顺
张海英
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中国科学院微电子研究所
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Abstract

本发明公开了一种无线射频识别测距或定位系统及其方法,属于无线射频识别技术领域。 The present invention discloses a system for locating or identifying the ranging and radio frequency methods, belonging to the field of radio frequency identification technology. 该系统包括参数设置模块、数据读取模块、计时模块、数据处理模块和信息处理模块。 The system comprises a parameter setting module, data read module, a timing module, a data processing module and the information processing module. 本发明可有效减少空间中障碍物或物体的变化对射频识别测距或定位结果的影响,在不增加系统复杂度的情况下,大幅度提高测距和定位精度。 The present invention can effectively reduce the impact of changes in space on the object or obstacle ranging or RFID positioning result, without increasing the complexity of the system, greatly improve the positioning accuracy and distance. 此外,本发明采用多次测量阅读器读取标签的计时时间的方法,减少了系统延迟时间的误差对整个测距和定位功能精度的影响,增加了系统的可靠性和稳定性。 Further, the present invention uses multiple measurement method of a tag reader reads the measured time, reducing the influence of the error of the entire system delay time and the distance measurement accuracy positioning function, increases the reliability and stability of the system.

Description

一种无线射频识别测距或定位系统及其方法 A radio frequency identification system and method for positioning or ranging

技术领域 FIELD

[0001] 本发明属于无线射频识别技术领域,特别涉及一种无线射频识别测距或定位系统及其方法。 [0001] The present invention belongs to the field of radio frequency identification technology, particularly to a radio frequency identification system and a method for ranging or positioning.

背景技术 Background technique

[0002] 随着全球经济的快速腾飞,科学技术的迅猛发展,以及汽车和智能手机的普及,无线定位技术日趋完善和成熟,在生产、仓储、物流、交通等全球各个领域和行业都有广泛应用。 [0002] With the rapid take-off of the global economy, the rapid development of science and technology, as well as access to cars and smart phones, wireless location technologies are maturing and mature, production, warehousing, logistics, transportation and other fields have a wide range of industries around the world application.

[0003] 在室外定位方面,基于卫星通信的全球定位系统(GPS)导航系统技术发展已经十分成熟,从车内的导航系统到个人手机的自助定位和导航服务,都可以实现较为精确地定位和导航功能。 [0003] In the outdoor positioning, based on the Global Positioning System satellite communication (GPS) navigation technology has been very mature, car navigation systems from mobile phones to personal self-positioning and navigation services, can achieve more accurate positioning and navigation. 水平定位精度约为20-30米,理论值为2.93-29米,由于地球内部没有卫星,因此,其垂直定位精度偏低,仅为45-100米,如果采用传感器辅助,可改善为5-10米。 Horizontal positioning accuracy of about 20-30 meters, the theoretical value of 2.93-29 m, because no satellite Earth's interior, and therefore, the vertical positioning accuracy is low, only 45-100 meters, if the auxiliary sensor may be improved 5- 10 m. 在所有条件良好的情况下,GPS启动获取时间约为I分钟。 Under all conditions are good, GPS acquisition time is about I start minutes.

[0004] 近年来,随着我国经济的增长,城市的规模快速扩张,越来越多的大型建筑涌现出来,例如地铁系统,大型展会建筑,大型商场,博物馆、图书馆等。 [0004] In recent years, as China's economic growth, rapid expansion of the scale of the city, more and more large buildings emerged, such as the subway system, a large exhibition buildings, shopping malls, museums, libraries and so on. 这些大型建筑在提供大型的室内空间的同时,也给我们带来了一个室内定位和导航的新难题。 These large buildings while providing large indoor space, but also brought us a new problem of indoor positioning and navigation. 然而,在这些封闭或者半封闭的区间,GPS信号受墙壁或者其他障碍物的阻碍会大大减弱,无法进行精确的定位和导航。 However, in these closed or semi-closed interval, GPS signal is obstructed walls or other obstructions will be greatly reduced, not precise positioning and navigation. 因此,我们需要研究新的无线定位技术来弥补GPS定位在室内环境下和高精度情况下的不足。 Therefore, we need to study the new wireless location technology to compensate for GPS positioning in indoor environments and high-precision case of shortage.

[0005]目前,应用于室内和高精度定位的无线技术主要有超声波、红外线、蓝牙、WLAN、射频识别、超宽带和ZigBee等。 [0005] Currently, high-precision positioning and for indoor wireless technologies include ultrasound, infrared, Bluetooth, WLAN, RFID, ZigBee, etc., and Ultra Wideband. 这些技术中比较成功的系统是将超声波和射频识别技术相结合的Cricket系统,该系统定位精度可达到厘米级别,目前已投入商业应用。 These techniques are successful Cricket system and ultrasonic system combining RFID technology, the system can achieve centimeter level positioning accuracy, it has been put into commercial use.

[0006] Cricket室内定位系统的是由用户携带的接收器、固定放置在建筑物内的参考节点以及中心服务器组成。 [0006] Cricket indoor positioning system receiver is carried by the user, a fixed place in the building and the center reference node servers. 每一个参考节点被赋予唯一的识别码,以识别自身所在的区域,同时转发数据给服务器。 Each reference node is assigned a unique identification code to identify where the area itself, and forward the data to the server. 由服务器完成对数据的进一步计算处理,从而实现定位功能。 Calculation by the server to complete processing of the data further, so as to achieve targeting. 其数据处理利用的主要是TDOA (到达时间差)算法,即移动端所持的接收机发射超声波信号和射频信号,附近的参考节点收到信号后,反馈带有自身位置信息的射频信号和超声波信号,接收机根据接收到两种信号的时间差来计算与参考节点之间的距离,然后根据已知的参考节点位置计算出移动端所在的地理位置信息。 The data processing which mainly use the TDOA (time difference of arrival) algorithm, i.e., the mobile terminal held by the receiver transmits ultrasonic signals and radio frequency signals, the received signal close to the reference node, a feedback RF signal and an ultrasonic signal with its own position information, the receiver calculates the distance difference between the reference node based on the time received and the two signals, and then calculates the location information of the mobile terminal is located according to known reference node positions.

[0007] 这种定位系统可以有效地解决室内环境下人员对自身的定位,为人员的出行和物流等行业提供了极大的便利。 [0007] Such positioning systems can effectively solve positioned in an indoor environment of its own personnel, provides great convenience for travel and logistics industries personnel. 但是,这种定位系统只能实现人员或车辆的主动式定位,而无法实现对于大量同类物品的被动式定位,例如图书馆内书籍的定位或博物馆内展品的定位或超市等大型购物中心商品的定位等。 However, this can only be achieved positioning system of active people or vehicles positioning, passive positioning can not be achieved for a large number of similar items, such as shopping malls positioning goods such as books within the library or museum exhibits positioning positioning or supermarket Wait.

[0008] 实际上,这种被动式定位应用的场景还有很多,与人们的生活息息相关,在日常生活中,人们有很多重要的物品或文件常常会记不起放置的地方,经常需要花费大量的时间和精力来寻找。 [0008] In fact, this passive location-based applications, there are many scenes with people's lives, in their daily lives, people place a lot of important articles or documents often do not remember to place, often it takes a lot of time and effort to find. 如果可以对这些物品或文件精确定位,即可节省大量的时间,也免去不少麻烦。 If you can pinpoint these articles or documents, you can save a lot of time, but also eliminates a lot of trouble. 然而,这种被动式定位针对的是书籍或者随身携带的小物品等,因此要求用于该定位的系统必须成本低而且体积小,适合量产,易于携带和推广。 However, this is a passive targeted to carry books or other small items, thus requiring a system for the positioning must be low cost and small size, suitable for mass production, easy to carry and promotion. 在上述的这些无线定位技术中,只有射频识别(RFID)技术可以满足以上要求。 In the these wireless location technology, only a radio frequency identification (RFID) technology to meet the above requirements.

[0009] RFID是利用无线电波对目标进行识别和读写,其最大的优点是不需要人工干预,RFID机器会自动获取RFID标签上的数据并传送到计算机系统中进一步应用。 [0009] RFID is a target identification and read using radio waves, its biggest advantage is no human intervention, the machine will automatically acquired RFID data on the RFID tag and transferred to the computer system further use. 该技术作为快速、实时、准确采集与处理信息的高新技术和信息标准化的基础,已经被世界公认为本世纪十大重要技术之一,在生产、零售、物流、交通等各个行业有着广阔的应用前景。 The technology as a rapid, real-time, accurate collection and processing base of high-tech and information standardization of information, has been recognized as one of the world's top ten important technology-oriented century, in various industries manufacturing, retail, logistics, transportation, and so has broad application prospect. RFID根据标签的不同,具有不同的应用场景。 Depending on the RFID tags having different application scenarios. RFID的无源标签价格低廉,从阅读器发出的电磁场获得能量,适用于短距离的定位;RFID的有源标签包含电池,自身即可提供能量,适用于长距离的通信。 Passive RFID tags low price, the electromagnetic field emitted from the reader obtain energy for positioning a short distance; active RFID tags include a battery, provides power to itself, suitable for long distance communication.

[0010]目前,RFID实时定位系统尚未大规模展开针对此被动式定位场景下的研究,主要是针对主动式定位场景下的研究。 [0010] Currently, RFID RTLS has not launched a large scale research on this passive positioning of the scene, mainly for research in active positioning scene. 研究采用的技术主要包括基于测距的定位和无须测距的定位两种,其中,基于测距的定位常用的技术包括接收信号强度检测(RSSI)和相位变化检测两种。 Techniques used include location-based ranging and without both targeting ranging, wherein positioning based on conventional ranging techniques include detection of two received signal strength detector (RSSI) and phase variations. 这两种技术都会受信号传播过程中路径的干扰影响,导致结果误差较大,精度较低,迟迟无法推广。 Both techniques are affected by interference during the signal propagation paths, resulting in large errors result, lower accuracy, prevented from deploying. 因此,我们亟需完善和提高被动式定位场景下的定位系统和精度。 Therefore, we need to improve and improve accuracy in positioning systems and passive positioning scene.

发明内容 SUMMARY

[0011] 本发明所要解决的技术问题是提供一种无线射频识别测距或定位系统及其方法,解决了现有技术中无线射频技术对于室内被动式定位时的定位精度不准确的问题。 [0011] The present invention solves the technical problem of providing identification or ranging radio frequency positioning system and method solves the prior art radio frequency technology for indoor positioning accuracy passive positioning is not accurate.

[0012] 为解决上述技术问题,本发明提供了一种无线射频识别测距的系统,包括参数设置模块、数据读取模块、计时模块和数据处理模块;所述参数设置模块用于设定发送射频信号的次数,所述数据读取模块根据所述发送射频信号的次数,阅读器读取标签的信息,所述计时模块用于当所述阅读器开始读取标签信息时,记录开始时间,根据所述发送射频信号的次数,所述阅读器读取标签信息结束后,记录结束时间,所述数据处理模块根据所述阅读器读取标签的信息、所述开始时间和所述结束时间,计算所述标签与所述阅读器之间的距离,所述参数设置模块分别与所述数据读取模块、所述计时模块和所述数据处理模块通过数据接口相连,所述数据读取模块分别与所述计时模块和所述数据处理模块通过数据接口相连,所述计时模块与所述数据处理模块通过 [0012] In order to solve the above technical problem, the present invention provides a radio frequency identification ranging system, comprising a parameter setting module, data read module, a timing module and the data processing module; said parameter setting means for setting the transmission radio frequency signal, the data read module in accordance with the transmission frequency and radio frequency signals, the reader reads the tag information, the timing module is configured to start when the reader reads the tag information, recording start time, the number of times of the transmission RF signal, the tag reader reads the information after the recording end time, the data processing module in accordance with the read information tag reader, the start time and the end time, calculating a distance between the reader and the tag, the parameter setting module to the data read module, respectively, said timing module and the data processing module is connected through a data interface, the data read module respectively the timing module and the data processing module is connected via the data interface, the timing module and the data processing module 数据接口相连。 It is connected to the data interface.

[0013] 进一步地,所述系统还包括用户交互模块,所述用户交互模块与所述数据处理模块通过数据接口相连,所述用户交互模块用于图形显示所述读取标签的信息、所述开始时间、所述结束时间和所述标签与所述阅读器之间的距离。 [0013] Preferably, the system further comprising a user interaction module, the user interaction module and the data processing module is connected via the data interface, the user interaction module for graphically displaying the read tag information, the start time, the time and the distance between the tag and the reader ends.

[0014] 一种无线射频识别测距的方法,包括如下步骤: [0014] A radio frequency identification ranging method, comprising the steps of:

[0015] 步骤101:设定发送射频信号的次数; [0015] Step 101: setting the transmission frequency of the radio frequency signal;

[0016] 步骤102:根据所述发送射频信号的次数,阅读器读取标签的信息; [0016] Step 102: The number of times of the transmission radio frequency signals, the reader reads the information tag;

[0017] 步骤103:当所述阅读器开始读取标签信息时,记录开始时间,根据所述发送射频信号的次数,所述阅读器读取标签信息结束后,记录结束时间; [0017] Step 103: when the reader starts reading the tag information, recording start time, based on the number of the transmission radio frequency signal, after the reader reads the tag information, recording end time;

[0018] 步骤104:根据所述阅读器读取标签的信息、所述开始时间和所述结束时间,计算所述标签与所述阅读器之间的距离。 [0018] Step 104: The information the reader reads a tag, the start time of the distance between the tag and the reader and the end time is calculated.

[0019] 进一步地,所述计算标签与阅读器之间的距离的方法如式(I)和式(2)所示:[0020] Δ t= (Τ0/Ν) - ( Λ T+ Λ T1+ Λ T2+ Δ T3) [0019] Further, the method of calculating the distance between the tag and reader, such as formula (I) and formula (2): [0020] Δ t = (Τ0 / Ν) - (Λ T + Λ T1 + Λ T2 + Δ T3)

[0021] (I) [0021] (I)

[0022] 其中,Ttl为所述阅读器读取操作的过程所需要的时间,N为发送射频信号的次数,AT为所述结束时间与所述开始时间的差,AT1为所述阅读器延迟一段时间完成发送射频信号命令需要的时间,AT2为所述标签接收到所述射频信号,将其转换为自己的能量,并返回电磁信号的过程需要的时间,AT3为所述阅读器接收到来自所述标签的反馈信号进行处理直至开始延时过程需要的时间,At为所述射频信号在所述阅读器与所述标签之间的传播路径上的单次往返时间; Time [0022] wherein, Ttl reader of the process is required for the reading operation, N is the number of radio frequency signal transmission, AT is the difference between the end time and the start time, AT1 delay to the reader time to complete a period of time required for transmitting radio frequency command signal, said tag AT2 is receiving the RF signal, convert them to their energy, and returns the process requires an electromagnetic signal, for the AT3 is received from the reader the feedback signal of the tag and the start of the processing time required during the delay, at the radio frequency signal to a single round-trip propagation time on the path between the reader and the tag;

[0023] S=V* Δ t/2 [0023] S = V * Δ t / 2

[0024] (2) [0024] (2)

[0025] 其中,V为所述射频信号的传输速度,△ t为所述射频信号在所述阅读器与所述标签之间的传播路径上的单次往返时间,S为所述阅读器与所述标签之间的距离。 [0025] wherein, V is the velocity of the transmission radio frequency signals, △ t is the round-trip time of RF signals on a single channel between the reader and the tag, S is the reader and the distance between the label.

[0026] 进一步地,所述测距的方法还包括: [0026] Furthermore, the ranging method further comprises:

[0027] 步骤105:图形显示所述读取标签的信息、所述开始时间、所述结束时间和所述标签与所述阅读器之间的距离。 [0027] Step 105: the graphic display tag reading, the starting time, the ending time and the distance between the tag and the reader.

[0028] 一种无线射频识别测距的系统,包括参数设置模块、数据读取模块、数据分析模块、计时模块和数据处理模块;所述参数设置模块用于设定发送射频信号的次数,所述数据读取模块根据所述发送射频信号的次数,阅读器读取标签的信息,所述数据分析模块用于统计所述阅读器读取标签信息的`个数,所述计时模块用于当所述阅读器开始读取标签信息时,记录开始时间,根据所述发送射频信号的次数,所述阅读器读取标签信息结束后,记录结束时间,所述数据处理模块根据所述阅读器读取标签的信息、所述开始时间和所述结束时间,计算所述标签与所述阅读器之间的距离,然后根据几何定位计算法计算所述标签的位置,所述参数设置模块分别与所述数据读取模块、所述计时模块和所述数据处理模块通过数据接口相连,所述数据读取模块分别与所 [0028] A radio frequency identification ranging system, comprising a parameter setting module, data read module, a data analysis module, a timing module and the data processing module; said parameter setting means for setting the transmission frequency of the RF signal, the said data reading module according to the transmission frequency and radio frequency signals, the reader reads the tag information, the data analysis module is configured to count the number of `tag reader reads the information, the timing module configured to, when when the reader starts reading the tag information, recording start time, based on the number of the transmission radio frequency signal, after the reader reads the tag information, recording end time, the data processing module in accordance with the read reader taking tag information, the start time and the end time, the distance between the tag and the reader is calculated, and then calculates the position of the tag geolocation calculation, the parameter setting module, respectively the said data reading module, said timing module and the data processing module is connected through the data interface, the data read module are respectively 计时模块和所述数据处理模块通过数据接口相连,所述数据分析模块分别于所述数据读取模块和所述计时模块通过数据接口相连,所述计时模块与所述数据处理模块通过数据接口相连。 Timing module and the data processing module is connected through a data interface, the data analysis module, respectively, to the data reading module and said timing module is connected through the data interface, the timing module and the data processing module is connected through a data interface .

[0029] 一种无线射频识别定位的方法,包括如下步骤: [0029] A radio frequency identification positioning method, comprising the steps of:

[0030] 步骤201:设定发送射频信号的次数; [0030] Step 201: setting the transmission frequency of the radio frequency signal;

[0031] 步骤202:根据所述发送射频信号的次数,阅读器读取标签的信息; [0031] Step 202: The number of times of the transmission radio frequency signals, the reader reads the information tag;

[0032] 步骤203:统计所述阅读器读取标签信息的个数,当所述阅读器读取标签信息的个数大于3时,直接执行步骤204,当所述阅读器读取标签信息的个数小于3时,则延迟一段时间后再次发送射频信号,直至所述读取标签信息的个数大于3以上,当重复多次后所述阅读器读取标签信息的个数不超过3时,所述方法结束执行; [0032] Step 203: the tag reader reads the statistical information of the number, when the reader reads the tag information number is greater than 3, perform Step 204, when the reader reads the tag information if the number is less than 3, then again after a delay time to send a radio frequency signal, until the read tag information number is greater than 3 or more, when the 3 repeated many times the information reader reads the tag does not exceed the number of the method then ends execution;

[0033] 步骤204:当所述阅读器开始读取标签信息时,记录开始时间,根据所述发送射频信号的次数,所述阅读器读取标签信息结束后,记录结束时间; [0033] Step 204: when the reader starts reading the tag information, recording start time, based on the number of the transmission radio frequency signal, after the reader reads the tag information, recording end time;

[0034] 步骤205:根据所述阅读器读取标签的信息、所述开始时间和所述结束时间,计算所述标签与所述阅读器之间的距离,然后根据几何定位计算法计算所述标签的位置。 [0034] Step 205: The information the reader reads a tag, the start time and the end time, the distance between the reader and the tag calculation, and is calculated according to the calculation geolocation position of the label.

[0035] 进一步地,所述计算标签与阅读器之间的距离的方法如式(I)和式(2)所示: [0035] Further, the method of calculating the distance between the tag and reader, such as formula (I) and formula (2):

[0036] Δ t= (T0/N) - ( Λ T+ Λ T1+ Λ T2+ Δ T3)[0037] ( I) [0036] Δ t = (T0 / N) - (Λ T + Λ T1 + Λ T2 + Δ T3) [0037] (I)

[0038] 其中,Ttl为所述阅读器读取操作的过程所需要的时间,N为发送射频信号的次数,AT为所述结束时间与所述开始时间的差,AT1为所述阅读器延迟一段时间完成发送射频信号命令需要的时间,AT2为所述标签接收到所述射频信号,将其转换为自己的能量,并返回电磁信号的过程需要的时间,AT3为所述阅读器接收到来自所述标签的反馈信号进行处理直至开始延时过程需要的时间,At为所述射频信号在所述阅读器与所述标签之间的传播路径上的单次往返时间; Time [0038] wherein, Ttl reader of the process is required for the reading operation, N is the number of radio frequency signal transmission, AT is the difference between the end time and the start time, AT1 delay to the reader time to complete a period of time required for transmitting radio frequency command signal, said tag AT2 is receiving the RF signal, convert them to their energy, and returns the process requires an electromagnetic signal, for the AT3 is received from the reader the feedback signal of the tag and the start of the processing time required during the delay, at the radio frequency signal to a single round-trip propagation time on the path between the reader and the tag;

[0039] S=V* Δ t/2 [0039] S = V * Δ t / 2

[0040] (2) [0040] (2)

[0041] 其中,V为所述射频信号的传输速度,△ t为所述射频信号在所述阅读器与所述标签之间的传播路径上的单次往返时间,S为所述阅读器与所述标签之间的距离。 [0041] wherein, V is the velocity of the transmission radio frequency signals, △ t is the round-trip time of RF signals on a single channel between the reader and the tag, S is the reader and the distance between the label.

[0042] 进一步地,所述定位的方法还包括: [0042] Furthermore, the positioning method further comprising:

[0043] 步骤206:图形显示所述读取标签的信息、所述开始时间、所述结束时间和所述标签与所述阅读器之间的距离,当所述步骤203中所述方法执行结束时,显示定位失败信息。 [0043] Step 206: the graphic display tag reading, the starting time, the ending time and the distance between the reader and the tag, when the method is performed in step 203 in the end when display positioning failure information.

[0044]进一步地,所述几何定位计算方法包括三边定位法、三角定位法或双曲线定位法的任意一种。 [0044] Further, the method includes positioning calculation geometric trilateration any one positioning method, or hyperbolic triangulation positioning method.

[0045] 本发明提供的一种无线射频识别测距或定位系统及其方法,可有效减少空间中障碍物或物体的变化对射频识别测距或定位结果的影响,在不增加系统复杂度的情况下,大幅度提高测距和定位精度。 [0045] The recognition distance or a radio positioning system and method of the present invention provides a radio frequency, which can effectively reduce the impact of changes in space on the object or obstacle ranging or RFID positioning result, without increasing the complexity of the system case, greatly improve the positioning accuracy and distance. 此外,本发明采用多次测量阅读器读取标签的计时时间的方法,减少了系统延迟时间的误差对整个测距和定位功能精度的影响,增加了系统的可靠性和稳定性。 Further, the present invention uses multiple measurement method of a tag reader reads the measured time, reducing the influence of the error of the entire system delay time and the distance measurement accuracy positioning function, increases the reliability and stability of the system.

附图说明 BRIEF DESCRIPTION

[0046] 图1为本发明实施例提供的一种无线射频识别测距的方法流程图; [0046] FIG. 1 is a flowchart radio frequency identification method for ranging according to an embodiment of the present invention;

[0047] 图2为本发明实施例提供的一种无线射频识别定位的方法流程图。 [0047] FIG 2 is a flowchart provided a method for radio frequency identification and the location of the embodiment of the present invention.

具体实施方式 Detailed ways

[0048] 实施例1: [0048] Example 1:

[0049] 本发明实施例提供的一种无线射频识别测距系统,包括参数设置模块、数据读取模块、计时模块和数据处理模块;参数设置模块用于设定发送射频信号的次数,数据读取模块根据发送射频信号的次数,阅读器读取标签的信息,计时模块用于当阅读器开始读取标签信息时,记录开始时间,根据发送射频信号的次数,阅读器读取标签信息结束后,记录结束时间,数据处理模块根据阅读器读取标签的信息、开始时间和结束时间,计算标签与阅读器之间的距离,参数设置模块分别与数据读取模块、计时模块和数据处理模块通过数据接口相连,数据读取模块分别与计时模块和数据处理模块通过数据接口相连,计时模块与数据处理模块通过数据接口相连。 [0049] A radio frequency identification ranging system according to an embodiment of the present invention includes a parameter setting module, data read module, a timing module and the data processing module; count parameter setting means for setting a radio frequency signal transmission, the data read the radio frequency transmitting module to take a signal, a tag reader reads information, timing means for, when the reader starts reading the tag information, recording start time, based on the number of transmitting radio frequency signals, after the end of the reader to read the tag information , recording end time, the data processing module reads the information tag reader according to distance, the parameter setting module between the start time and end time, and calculates the tag reader and the data are read module, a timing module and the data processing module a data interface connected to the data read module are respectively connected to the data interface timing module and the data processing module, a timing module and the data processing module is connected via the data interface. 在本发明实施例中,可以通过用户和可供其操作的客户端、用于进行信息交互和处理的信息服务器、装有标签的待测距物体和集成有计时功能的阅读器来实现,具体为:阅读器、客户端和信息服务器通过局域网或其他方式通信,其中,两个阅读器都可以将三个Tag都覆盖。 In an embodiment of the present invention, it can be used to exchange information and information processed by the server and the user clients for their operation, with the object distance and the label to be integrated with a chronograph function attached reader to achieve the specific as follows: the reader, the information server and the client through the LAN communication or other means, wherein the two readers Tag can be three covered. 该实例选取其中一种情况,例如测量阅读器I和标有Tag2的书籍之间的距离。 This example select one of the cases, for example, the reader measuring the distance between I and labeled Tag2 of books.

[0050] 其中,该系统还可以包括用户交互模块,用户交互模块与数据处理模块通过数据接口相连,用户交互模块用于图形显示读取标签的信息、开始时间、结束时间和标签与阅读器之间的距离。 [0050] wherein, the system further may include a user interaction module, the user interaction module and the data processing module is connected through a data interface, a user interaction module for graphically displaying the information read tags, start time, end time, and the tags and readers the distance between.

[0051] 参见图1,一种无线射频识别测距的方法,包括如下步骤: [0051] Referring to Figure 1, a radio frequency identification ranging method, comprising the steps of:

[0052] 步骤101:设定发送射频信号的次数; [0052] Step 101: setting the transmission frequency of the radio frequency signal;

[0053] 步骤102:根据发送射频信号的次数,阅读器读取标签的信息; [0053] Step 102: according to the number of transmitting radio frequency signals, the reader reads the information tag;

[0054] 步骤103:当阅读器开始读取标签信息时,记录开始时间,根据发送射频信号的次数,阅读器读取标签信息结束后,记录结束时间; [0054] Step 103: when the reader starts reading the tag information, recording start time, based on the number of transmitting radio frequency signals, after the end of the reader to read the tag information, recording end time;

[0055] 步骤104:根据阅读器读取标签的信息、开始时间和结束时间,计算标签与阅读器之间的距离。 [0055] Step 104: the reader to read the tag information according to the distance between the start time and end time, and calculates the tag reader.

[0056] 在本发明实施例中,测距开始时,用户在客户端上进行相关测距参数的设置,其中包括阅读器读取标签的次数N和选择想要测距的目标物体一贴有Tag2的书籍。 [0056] In an embodiment of the present invention, the distance measurement starts, the user is provided on the ranging parameters related to the client, which includes a tag reader to read and select the desired number N of the target object distance have a Tag2 books. 在参数设置完成以后,客户端通过局域网或者其他通信方式将所设置的信息发送给信息服务器。 After the parameter setting is completed, the client sends the set information to the information server via a local area network or other communication method.

[0057] 信息服务器接收到来自客户端的参数设置后,开始向范围内的阅读器发送广播,并开始对范围内的Tag2进行读取,如果不能读取到Tag2的ID信息,则信息服务器随机延迟一段时间后,再次向网络内的阅读器发送广播,如果重复上述过程超过5次后,仍然无法读取到Tag2的ID信息,则信息服务器直接向客户端返回测距失败的命令,然后等待下一次的测距请求。 [0057] After the server receives a message parameter from the client to begin transmitting the broadcast range to the reader, and starts reading Tag2 range, if not read the ID information Tag2, the random delay information server after some time, the reader again transmits a broadcast to the network, if the process is repeated more than 5 times, still can not read the ID information Tag2, the information server returns a ranging failure command directly to the client, and wait for the next a ranging request.

[0058] 如果成功读取到Tag2的ID信息,则在开始进行N次读取Tag2的ID信息的同时开始计时,直到N次读取Tag2的ID信息之后,停止计时,所需时间为I;。 [0058] If the ID information Tag2 successfully read, then at the start of reading the ID information Tag2 N times simultaneously start counting until after reading the ID information Tag2 N times, stop the timer, the time required is I; . 系统设定接收到来自标签的返回信息后,延迟AT的时间。 The system receives the return message is set, the delay time AT from the tag. 阅读器延迟一段时间完成发送射频信号命令需要的时间记为AT1 ;标签接收到射频信号,将其转换为自己的能量,并返回电磁信号的过程需要的时间记为AT2 ;阅读器接收到来自标签的反馈信号进行处理直至开始延时过程需要的时间记为λτ3。 Reader delay period of time to complete the transmission radio frequency signal command requires a time referred to as of AT1; time stamp the received RF signal, convert them to their energy and return electromagnetic signal process requires referred to as AT2 is; reader received from the tag the feedback signal processing time required until the start delay process referred to as λτ3.

[0059] 其中,Λ !\、八^和AT3是系统延迟时间,是其固有属性,不随标签信息的不同而发生改变,因此可通过先期实验测量得出。 [0059] wherein, Lambda! \, ^, And AT3 are eight system delay time, which is an inherent property of the tag information does not vary with the changes, thus can be obtained in advance by experimental measurements. 故而,射频信号在阅读器与标签之间的传播路径上的单次往返时间为 Therefore, a single radio frequency signal in the propagation path round-trip time between the reader and the tag is

[0060] Δ t= (T0/N) - ( Λ T+ Λ T1+ Λ T2+ Δ T3) [0060] Δ t = (T0 / N) - (Λ T + Λ T1 + Λ T2 + Δ T3)

[0061 ] 由此,可计算出阅读器与标签之间的距离为 [0061] Accordingly, the calculated distance between the reader and the tag is

[0062] S=V* Δ t/2 [0062] S = V * Δ t / 2

[0063] 其中,V是射频信号也即电磁波的速度,即V=3X 108m/s。 [0063] wherein, V is the RF signal that is an electromagnetic wave velocity, i.e., V = 3X 108m / s.

[0064] 该计算过程由信息服务器执行,得出计算结果后,信息服务器通过局域网或者其他连接方式将结果发送到用户的客户端上,然后等待客户端下次的测距请求。 [0064] After the calculation process performed by the information server, the results obtained, the information server sends the results to the user client through LAN or other connection, and then waits for the next ranging request of the client.

[0065] 其中,该测距的方法还包括: [0065] wherein the ranging method further comprises:

[0066] 步骤105:图形显示读取标签的信息、开始时间、结束时间和标签与阅读器之间的距离。 [0066] Step 105: reading the tag information of the graphic display, the distance between the start time, end time, and tag and reader.

[0067] 实施例2: [0067] Example 2:

[0068] 一种无线射频识别测距的系统,包括参数设置模块、数据读取模块、数据分析模块、计时模块和数据处理模块;参数设置模块用于设定发送射频信号的次数,数据读取模块根据发送射频信号的次数,阅读器读取标签的信息,数据分析模块用于统计阅读器读取标签信息的个数,计时模块用于当阅读器开始读取标签信息时,记录开始时间,根据发送射频信号的次数,阅读器读取标签信息结束后,记录结束时间,所述数据处理模块根据阅读器读取标签的信息、开始时间和结束时间,计算标签与阅读器之间的距离,然后根据几何定位计算法计算所述标签的位置,参数设置模块分别与数据读取模块、计时模块和数据处理模块通过数据接口相连,数据读取模块分别与计时模块和数据处理模块通过数据接口相连,数据分析模块分别于数据读取模块和所计时模 [0068] A radio frequency identification ranging system, comprising a parameter setting module, data read module, a data analysis module, a timing module and the data processing module; parameter setting means for setting the number of times of transmitting a radio frequency signal, the data read module according to the number of transmitting radio frequency signals, the reader reads the tag information, the data for statistical analysis module reader reads the tag information number, timing means for, when the reader starts reading the tag information, recording start time, the number of times of transmitting radio frequency signals, after the end of the reader to read the tag information, recording end time, the data processing module in accordance with the read information tag reader, start time and end time is calculated between the tag and reader distance, then according to the geometric positioning of the label position calculation method of calculating, the parameter setting module respectively data read module, a timing module and the data processing module is connected via the data interface, the data read module respectively timing module and the data processing module is connected through a data interface the data analysis module, respectively, and the data read module watch mode 块通过数据接口相连,计时模块与数据处理模块通过数据接口相连。 Block is connected via the data interface, the timing module and the data processing module is connected via the data interface. 在本发明实施例中,可以通过用户和可供其操作的客户端,用于进行信息交互和处理的信息服务器,3个装有标签的待定位物体和8个集成有计时功能的阅读器,阅读器、客户端和信息服务器通过局域网或其他方式通信,其中,多个阅读器的布置规则为,在其覆盖范围内,任意一带有标签的物体都可以被至少三个阅读器读取到。 In an embodiment of the present invention, it can be used for information exchange and process the information server by the user and the client for its operation, the tag 3 with the object to be positioned and 8 integrated reader chronograph function, reader, the information server and the client through the LAN communication or other means, wherein a plurality of readers arrangement rule is in its coverage area, any object with a label can be read at least three readers to. 该实例选取其中一种情况,例如定位标有Tag2的书籍在空间中的位置信息。 This example select one of the cases, for example, marked books Tag2 positioning position information in space.

[0069] 参见图2,一种无线射频识别定位的方法,包括如下步骤: [0069] Referring to Figure 2, a radio frequency identification positioning method, comprising the steps of:

[0070] 步骤201:设定发送射频信号的次数; [0070] Step 201: setting the transmission frequency of the radio frequency signal;

[0071] 步骤202:根据发送射频信号的次数,阅读器读取标签的信息; [0071] Step 202: according to the number of transmitting radio frequency signals, the reader reads the information tag;

[0072] 步骤203:统计阅读器读取标签信息的个数,当阅读器读取标签信息的个数大于3时,直接执行步骤204,当阅读器读取标签信息的个数小于3时,则延迟一段时间后再次发送射频信号,直至读取标签信息的个数大于3以上,当重复多次后阅读器读取标签信息的个数不超过3时,方法结束执行; [0072] Step 203: the tag reader reads the statistical information, the number, when the reader reads the tag information number is greater than 3, perform Step 204, when the reader reads the tag information number is less than 3, number of transmission radio frequency signals, the delay period again, until the tag information reader 3 is greater than the above, when the reader reads the tag information number is not more than 3 was repeated several times, the implementation of the method ends;

[0073] 步骤204:当读取标签信息时,记录开始时间,根据发送射频信号的次数,读取标签信息结束后,记录结束时间; [0073] Step 204: When reading the tag information, recording start time, based on the number of transmitting radio frequency signals, after reading the tag information, recording end time;

[0074] 步骤205:根据读取标签的信息、开始时间和结束时间,计算标签与阅读器之间的距离,然后根据几何定位计算法计算标签的位置。 [0074] Step 205: reading the tag information according to the start time and end time, calculates a distance between the tag and the reader, and then calculates the tag location based on geometric positioning calculation.

[0075] 其中,计算标签与阅读器之间的距离的方法如式(I)和式(2)所示: [0075] wherein the method for calculating the distance between the tag and reader, such as formula (I) and formula (2):

[0076] Δ t= (T0/N) - ( Λ T+ Λ T1+ Λ T2+ Δ T3) [0076] Δ t = (T0 / N) - (Λ T + Λ T1 + Λ T2 + Δ T3)

[0077] (I) [0077] (I)

[0078] 其中,Ttl为阅读器读取操作的过程所需要的时间,N为发送射频信号的次数,AT为结束时间与开始时间的差,AT1为阅读器延迟一段时间完成发送射频信号命令需要的时间,AT2为标签接收到所述射频信号,将其转换为自己的能量,并返回电磁信号的过程需要的时间,AT3为阅读器接收到来自标签的反馈信号进行处理直至开始延时过程需要的时间,At为射频信号在阅读器与标签之间的传播路径上的单次往返时间; [0078] wherein, for the time Ttl reader reading operation required for the process, N is the number of transmitted RF signal, the AT is the difference between the end time and the start time, a delay of AT1 reader is a radio frequency signal transmission completion command requires time, AT2 is the time label of the received RF signal, converts it into their own energy, and returns the process requires an electromagnetic signal, AT3 received as a feedback signal to the reader from the tag processing during the delay required until the start time, at a radio frequency signal on a single round-trip time in the propagation path between the reader and the tag;

[0079] S=V* Δ t/2 [0079] S = V * Δ t / 2

[0080] (2) [0080] (2)

[0081] 其中,V为射频信号的传输速度,S为阅读器与标签之间的距离。 [0081] wherein, V is the RF signal transmission rate, S is the distance between the reader and the tag.

[0082] 其中,该定位的方法还包括: [0082] wherein the positioning method further comprises:

[0083] 步骤206:图形显示读取标签的信息、开始时间、结束时间和标签与阅读器之间的距离,当步骤203中方法执行结束时,显示定位失败信息。 [0083] Step 206: reading the tag information of the graphic display, start time, stop time and the distance between the tag and reader, when execution of the method in step 203, location failure information is displayed.

[0084] 其中,该几何定位计算方法包括三边定位法、三角定位法或双曲线定位法中的任——种,也可以包括这些定位算法所衍生出来的任意一种。 [0084] wherein the method comprises positioning calculation triangular geometric positioning method, any one of triangulation or hyperbolic positioning method - species, it may also include any one of these positioning algorithms derived.

[0085] 具体到本发明实施例中,定位开始时,用户在客户端上进行相关定位参数的设置,其中包括单次测距时阅读器读取标签的次数N和选择想要定位的目标物体一贴有Tag2的书籍。 [0085] In particular embodiments of the present invention to the embodiment, when positioning starts, the user to set parameters related to positioning on the client, including a tag reader to read a single pass distance, and selecting the number N of the target object desired location there are a Tag2 books. 在参数设置完成以后,客户端通过局域网或者其他通信方式将所设置的信息发送给信息服务器。 After the parameter setting is completed, the client sends the set information to the information server via a local area network or other communication method.

[0086] 信息服务器接收到来自客户端的参数设置后,开始向范围内的8个阅读器发送广播,并开始对覆盖范围内的Tag2进行读取,如果所有的阅读器不能读取到Tag2的ID信息,则信息服务器随机延迟一段时间后,再次向网络内的阅读器发送广播,如果重复上述过程超过5次后,仍然无法读取到Tag2的ID信息,则信息服务器直接向客户端返回定位失败的命令,然后等待下一次的定位的请求。 After [0086] the information server receives the parameter from the client begins to send a broadcast to the reader 8 range, and starts the coverage Tag2 reading, if not all of the reader to read the ID Tag2 information, the information server after a random delay, retransmits the broadcast to the viewer within the network, if the process is repeated more than 5 times, still can not read the ID information Tag2, the server returns information to the client directly positioned failure command, and then waiting for the next request targeting.

[0087] 如果有阅读器成功读取到Tag2的ID信息,但是能够读取到的阅读器的总数目小于3个,则信息服务器仍然随机延迟一段时间,然后继续广播,如果广播次数超过5次,信息服务器直接向客户端返回定位失败的命令,然后等待下一次的定位请求。 [0087] If the reader has successfully read the ID information Tag2, it is possible to read the total number of readers is less than 3, the information server is still random delay time and then continue broadcasting, if more than five times the number of broadcasts information server directly to the client returns a failed positioning command, then the location request waiting time.

[0088] 如果读取到Tag2的ID信息的阅读器的数目大于3个,则开始进行后续的定位过程: [0088] If the number of read ID information to the reader Tag2 greater than 3, the flow proceeds to a subsequent positioning process:

[0089] 首先,信息服务器在所有能够读到Tag2的ID信息的阅读器中随机选择一个开始测距,并将这些阅读器记为有效阅读器。 [0089] First, the information server randomly selects one ranging Start can read the ID information in all Tag2 the reader, and the reader is referred to the active reader.

[0090] 其次,装有计时装置的阅读器,在开始进行N次读取Tag2的ID信息的同时开始计时,直到N次读取Tag2的ID信息之后,停止计时,所需时间为T0。 [0090] Next, the reader is equipped with a timing device, reading the ID information at the beginning of Tag2 N times simultaneously begin timing until the ID information is read N times after Tag2 stop timing, the time required for the T0.

[0091] 第三,该阅读器将这一计时信息通过局域网或者其他通信方式发送到信息服务器中,进行数据处理工作。 [0091] Third, the reader transmits the timing information to the information server via a local area network or other means of communication, data processing work.

[0092] 然后,信息服务器随机延迟一段时间,在剩余的有效阅读器中随机选择一个重复第二和第三部的测距过程,并重复此过程,直至所有的有效阅读器都已完成测距过程,并将信息返回到信息服务器中。 [0092] Then, the information server a random delay, a randomly selected portion of the second and third repeat ranging procedure the remaining active reader, and repeat this process until all active readers ranging has been completed process, and returns the information to the information server.

[0093] 继而,信息服务器将每个有效阅读器返回的计时数据按照实例说明I中的距离计算原理,处理得到每个有效阅读器与Tag2所标识的物体之间的距离,并存入数据库内。 [0093] Then, the server information data of each effective reading timing return instructions according to Example I is calculated from the principle of the process to obtain a distance between the reader and each active object Tag2 identified and stored within the database .

[0094] 最后,信息服务器根据上述步骤中计算得到的结果,利用三边定位法进行再次处理,得到Tag2所标识物体的空间位置信息。 [0094] Finally, the information server based on the results calculated in step performs processing again using the trilateral positioning method, to obtain positional information Tag2 identified object. 并将此信息通过局域网或者其他通信方式发送到用户的客户端上。 And this information is sent to the client via the LAN user or other means of communication. 然后等待客户端下一次的测距请求。 Then waits for a ranging request at the client.

[0095] 本发明针对利用RFID技术进行测距的过程以及利用RFID技术进行定位中的测距过程,采用此方法的RFID定位系统,减少了周围环境的变化或者障碍物的存在对系统精度的影响,此外,采用多次测量求单次时间的方法,是为了减少系统延迟误差的存在对精度的影响。 [0095] The present invention is directed to the process ranging RFID technology and the use of RFID technology for positioning the ranging procedure, the use of RFID location system of this method, there is a change or reduce the impact of obstacles surrounding the system accuracy in addition, the method required multiple measurements in a single time, there is a system to reduce the impact on accuracy of the delay error. 因此,本发明使得RFID定位技术具有更高的精度和更广泛的应用场景。 Accordingly, the present invention is positioned such that the RFID technology with a higher accuracy and a wider range of application scenarios.

[0096] 最后所应说明的是,以上具体实施方式仅用以说明本发明的技术方案而非限制,尽管参照实例对本发明进行了详细说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的精神和范围,其均应涵盖在本发明的权利要求范围当中。 [0096] Finally, it should be noted that the above specific embodiments are intended to illustrate the present invention and not limitation, although the present invention has been described in detail with reference to examples, those of ordinary skill in the art should be understood that the present invention technical solution modifications or equivalent replacements without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the present invention as claimed in which the required range.

Claims (10)

1.一种无线射频识别测距的系统,其特征在于,包括参数设置模块、数据读取模块、计时模块和数据处理模块;所述参数设置模块用于设定发送射频信号的次数,所述数据读取模块用于阅读器根据所述发送射频信号的次数,读取标签的信息,所述计时模块用于当所述阅读器开始读取标签信息时,记录开始时间,根据所述发送射频信号的次数,所述阅读器读取标签信息结束后,记录结束时间,所述数据处理模块根据所述阅读器读取标签的信息、所述开始时间和所述结束时间,计算所述标签与所述阅读器之间的距离,所述参数设置模块分别与所述数据读取模块、所述计时模块和所述数据处理模块通过数据接口相连,所述数据读取模块分别与所述计时模块和所述数据处理模块通过数据接口相连,所述计时模块与所述数据处理模块通过数据接口相连。 1. A radio frequency identification ranging system comprising parameter setting module, data read module, a timing module and the data processing module; said parameter setting means for setting the number of times of transmitting a radio frequency signal, said reader means for reading data according to the number of the transmission RF signal, the tag information is read, the timing module configured to, when the reader starts reading the tag information, recording start time, according to the transmission RF number of signals, after the reader reads the tag information, recording end time, the data processing module in accordance with the read information tag reader, the start time and the end time, and calculating said tag the distance between the reader, the parameter setting module reads the data module, respectively, said timing module and the data processing module is connected through a data interface, the data read module respectively with said timing module and the data processing module is connected via an interface data, said timing module and the data processing module is connected via the data interface.
2.根据权利要求1所述的系统,其特征在于,所述系统还包括用户交互模块,所述用户交互模块与所述数据处理模块通过数据接口相连,所述用户交互模块用于图形显示所述读取标签的信息、所述开始时间、所述结束时间和所述标签与所述阅读器之间的距离。 2. The system according to claim 1, characterized in that the system further comprises a user interaction module, the user interaction module and the data processing module is connected through a data interface, the user interaction module is configured to display the graphic reading said tag information, the start time, the end time and the distance between the tag and the reader.
3.一种无线射频识别测距的方法,其特征在于,包括如下步骤: 步骤101:设定发送射频信号的次数; 步骤102:根据所述发送射频信号的次数,阅读器读取标签的信息; 步骤103:当所述阅读器开始读取标签信息时,记录开始时间,根据所述发送射频信号的次数,所述阅读器读取标签信息结束后,记录结束时间; 步骤104:根据所述阅读器读取标签的信息、所述开始时间和所述结束时间,计算所述标签与所述阅读器之间的距离。 A radio frequency identification ranging method comprising the following steps: Step 101: setting the transmission frequency of the radio frequency signal; Step 102: The number of times of the transmission radio frequency signals, a tag reader reads information ; step 103: when the reader starts reading the tag information, recording start time, based on the number of the transmission radio frequency signal, after the reader reads the tag information, recording end time; step 104: according to the a tag reader reads information, the start time and the end time, the distance between the reader and the tag is calculated.
4.根据权利要求3所述的方法,其特征在于,所述计算标签与阅读器之间的距离的方法如式(I)和式(2)所示: Δ t= (T0/N) - ( Λ T+ Λ T1+ Λ T2+ Δ T3) Cl) 其中,Ttl为所述阅读器读取操作的过程所需要的时间,N为发送射频信号的次数,AT为所述结束时间与所述开始时间的差,AT1为所述阅读器延迟一段时间完成发送射频信号命令需要的时间,AT2为所述标签接收到所述射频信号,将其转换为自己的能量,并返回电磁信号的过程需要的时间,AT3为所述阅读器接收到来自所述标签的反馈信号进行处理直至开始延时过程需要的时间,At为所述射频信号在所述阅读器与所述标签之间的传播路径上的单次往返时间; S=V* Δt/2 (2) 其中,V为所述射频信号的传输速度,At为所述射频信号在所述阅读器与所述标签之间的传播路径上的单次往返时间,S为所述阅读器与所述标签之间的距离 4. The method according to claim 3, characterized in that the calculation method of the distance between tag and reader, such as formula (I) and formula (2): Δ t = (T0 / N) - (Λ T + Λ T1 + Λ T2 + Δ T3) Cl) wherein, Ttl said reader reads the time required for the operation, N is the number of transmitting radio frequency signals, AT is the start time and the end time the difference, as the reader of AT1 delay period of time to complete the desired command transmitting radio frequency signals, AT2 is the tag is receiving the RF signal, convert them to their energy, and during the return time required for an electromagnetic signal, AT3 to the reader receives the feedback signal from the tag and the start of the processing time required during the delay, at is a single radio frequency signal on the propagation path between the reader and the tag round trip time; S = V * Δt / 2 (2) where, V is the RF signal transmission rate, at is a single round trip of the RF signal in the propagation path between the reader and the tag time, S is between the reader and the tag distance
5.根据权利要求3所述的方法,其特征在于,所述测距的方法还包括: 步骤105:图形显示所述读取标签的信息、所述开始时间、所述结束时间和所述标签与所述阅读器之间的距离。 5. The method according to claim 3, wherein the ranging method further comprises: Step 105: the graphic display tag reading, the start time, the end time and the label the distance between the reader and.
6.一种无线射频识别测距的系统,其特征在于,包括参数设置模块、数据读取模块、数据分析模块、计时模块和数据处理模块;所述参数设置模块用于设定发送射频信号的次数,所述数据读取模块用于阅读器根据所述发送射频信号的次数,读取标签的信息,所述数据分析模块用于统计所述阅读器读取标签信息的个数,所述计时模块用于当所述阅读器开始读取标签信息时,记录开始时间,根据所述发送射频信号的次数,所述阅读器读取标签信息结束后,记录结束时间,所述数据处理模块根据所述阅读器读取标签的信息、所述开始时间和所述结束时间,计算所述标签与所述阅读器之间的距离,然后根据几何定位计算法计算所述标签的位置,所述参数设置模块分别与所述数据读取模块、所述计时模块和所述数据处理模块通过数据接口相连,所述数据读取 A radio frequency identification ranging system comprising parameter setting module, data read module, a data analysis module, a timing module and the data processing module; said parameter setting means for setting a radio frequency signal transmission number of times, the data read module reader for transmitting radio frequency signals according to the number of times of reading tag information, the data for statistical analysis module of the reader reads the tag information number, the timing means for, when the reader starts reading the tag information, recording start time, based on the number of the transmission radio frequency signal, after the reader reads the tag information, recording end time, the data processing module in accordance with the said reader reads the tag information, the start time and the end time, the distance between the tag and the reader is calculated, and the positioning calculation method according to the geometric position of the label, said parameter setting each module of the data read module, said timing module and the data processing module is connected via a data interface, the data reader 块分别与所述计时模块和所述数据处理模块通过数据接口相连,所述数据分析模块分别与所述数据读取模块和所述计时模块通过数据接口相连,所述计时模块与所述数据处理模块通过数据接口相连。 Blocks are connected to the data interface timing module and the data processing module, a data analysis module, respectively, to the data reading module and said timing module is connected through the data interface, the timing module and the data processing module is connected via the data interface.
7.一种无线射频识别定位的方法,其特征在于,包括如下步骤: 步骤201:设定发送射频信号的次数; 步骤202:根据所述发送射频信号的次数,阅读器读取标签的信息; 步骤203:统计所述阅读器读取标签信息的个数,当所述阅读器读取标签信息的个数大于3时,直接执行步骤204,当所述阅读器读取标签信息的个数小于3时,则延迟一段时间后再次发送射频信号,直至所述读取标签信息的个数大于3以上,当重复多次后所述阅读器读取标签信息的个数不超过3时,所述方法结束执行; 步骤204:当所述阅读器开始读取标签信息时,记录开始时间,根据所述发送射频信号的次数,所述阅读器读取标签信息结束后,记录结束时间; 步骤205:根据所述阅读器读取标签的信息、所述开始时间和所述结束时间,计算所述标签与所述阅读器之间的距离,然后根据几何定位计算法 7. A method of positioning a radio frequency identification, which is characterized in that it comprises the following steps: Step 201: setting the transmission frequency of the radio frequency signal; Step 202: The number of times of the transmission radio frequency signals, the reader reads the information tag; step 203: the tag reader reads the statistical information of the number, when the reader reads the tag information number is greater than 3, perform step 204, when the reader reads the tag information number is less than the number 3, then after a delay time to send a radio frequency signal again until the read tag information is greater than 3 or more, repeated 3 times after the reading of the tag information does not exceed the number of the reader, the performing the method ends; step 204: when the reader starts reading the tag information, recording start time, based on the number of the transmission radio frequency signal, after the reader reads the tag information, recording end time; step 205: the information the reader reads a tag, the start time and the end time, the distance between the tag and the reader is calculated, and the positioning calculation according to the geometric 算所述标签的位置。 Operator position of the tag.
8.根据权利要求7所述的方法,其特征在于,所述计算标签与阅读器之间的距离的方法如式(I)和式(2)所示: Δ t= (T0/N) - ( Λ T+ Λ T1+ Λ T2+ Δ T3) Cl) 其中,Ttl为所述阅读器读取操作的过程所需要的时间,N为发送射频信号的次数,AT为所述结束时间与所述开始时间的差,AT1为所述阅读器延迟一段时间完成发送射频信号命令需要的时间,AT2为所述标签接收到所述射频信号,将其转换为自己的能量,并返回电磁信号的过程需要的时间,AT3为所述阅读器接收到来自所述标签的反馈信号进行处理直至开始延时过程需要的时间,At为所述射频信号在所述阅读器与所述标签之间的传播路径上的单次往返时间; S=V* Δt/2 (2) 其中,V为所述射频信号的传输速度,At为所述射频信号在所述阅读器与所述标签之间的传播路径上的单次往返时间,S为所述阅读器与所述标签之间的距离 8. The method according to claim 7, wherein said calculation of distance between the tag and reader, such as formula (I) and formula (2): Δ t = (T0 / N) - (Λ T + Λ T1 + Λ T2 + Δ T3) Cl) wherein, Ttl said reader reads the time required for the operation, N is the number of transmitting radio frequency signals, AT is the start time and the end time the difference, as the reader of AT1 delay period of time to complete the desired command transmitting radio frequency signals, AT2 is the tag is receiving the RF signal, convert them to their energy, and during the return time required for an electromagnetic signal, AT3 to the reader receives the feedback signal from the tag and the start of the processing time required during the delay, at is a single radio frequency signal on the propagation path between the reader and the tag round trip time; S = V * Δt / 2 (2) where, V is the RF signal transmission rate, at is a single round trip of the RF signal in the propagation path between the reader and the tag time, S is between the reader and the tag distance
9.根据权利要求7所述的方法,其特征在于,所述定位的方法还包括: 步骤206:图形显示所述读取标签的信息、所述开始时间、所述结束时间和所述标签与所述阅读器之间的距离,当所述步骤203中所述方法执行结束时,显示定位失败信息。 9. The method according to claim 7, wherein said positioning method further comprises: Step 206: the graphic display tag reading, the start time, the end time and the label the distance between the reader, when execution of the step 203 in the method, location failure information is displayed.
10.根据权利要求7所述的方法, 其特征在于,所述几何定位计算方法包括三边定位法、三角定位法或双曲线定位法的任意一种。 10. The method according to claim 7, characterized in that the method comprises positioning calculation method of any one trilateral positioning, triangulation, or hyperbolic positioning method of the geometry.
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