CN1333669A - 用于激励一个远端站的装置以及相关方法 - Google Patents

用于激励一个远端站的装置以及相关方法 Download PDF

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CN1333669A
CN1333669A CN99815745A CN99815745A CN1333669A CN 1333669 A CN1333669 A CN 1333669A CN 99815745 A CN99815745 A CN 99815745A CN 99815745 A CN99815745 A CN 99815745A CN 1333669 A CN1333669 A CN 1333669A
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马林·H·米克勒
克文·W·韦尔斯
罗纳德·G·赫尔泽曼
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University of Pittsburgh
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Abstract

用于与感兴趣物体进行远程交互作用的一种装置,包括:用于从所述感兴趣物体(12)中获得信息的一个远端站,用于在空间中发射能量(8)给远端站并与远端站(4)通信的一个基站(2),并且该远端站具有转换装置,响应于所述发射能量的接收,用于激励所述远端站。能量可以是任何适合类型,包括:RF功率,光,声,磁能,或者其他形式的空间发射或“辐射”能。

Description

用于激励一个远端站的装置以及相关方法
本发明涉及通过在空间发射能量用于激励一个远端站的一种装置以及相关的方法，更明确的，它涉及这样一个系统，在其中，可以通过远端站获得与感兴趣物体有关的数据并在基站询问之后将其发射给基站。
在各种应用中，监视一个物理系统或者一个病人的状态并以某个情形实时读出的性质的形式提供信息早就已知。通过一合适的导线，这样的系统一般已经以诸如线路电流或者电池之类的期望电压连接到电源。
在关于监控诸如病人呼吸、心跳、心电图以及温度之类的特性的医学环境中提供这样的系统也是已知的。通常参见美国专利4,129,125；4,308,870；4,443,730；4,889,131以及5,335,551。
通过使用传感器、电池组电源系统以及数字处理装置来完成测量状态与已储存数值之间的比较并显示结果以便监视生理学上的参数在医学环境中也已是已知的。参见美国专利4,356,825。
美国专利5,230,342和5,586,555披露了血压监视器，特别强调在测量眼眶上动脉中的血压上使用具有一个可加压的压力变换水泡。
美国专利4,576,179披露了胸动作换能器以及相关的心率监控装置的使用。合作电子技术被提供。在被监视的个人的适当条件下或者在电池组电压已经下降低于一个预定电平的指示下可以触发警报装置。这里提及了提供一种远程监控台的信号的短范围无线电发射。还可参阅美国专利5,022,402。
美国专利4,494,553披露了电池组激励的呼吸和心脏的监视器，其中使用了一副电感线圈以及VHF/FM信号的传输。
尽管存在前述的已知系统，这里依然存在对可用在各种环境中以及距离基站(远程单元将适合于被该基站远程地激励而在远程单元上不需要硬布线系统或者电池)不同距离的一种远程单元的需要。这里还缺乏这样的系统，其中远程单元可以被小型化使得具有很多可能的利用。
本发明已经符合如上所述的需要。在本发明中，用于与感兴趣物体进行远程交互作用的装置包括：用于从该感兴趣物体中获得信息的一个远端站以及用于在空间中发射能量给该远端站并与该远端站通信的一个基站。该远端站具有通过使用发射能量用于激励远端站的转换装置。基站可以发射如RF功率，光，声音，磁，或者以空间发射的或者″辐射的″能量的其他适当形式的能量。
一个电源被提供用于激励基站，该基站具有提供在基站上的第一天线装置和提供在远端站上的第二天线装置。传感器装置或者其它信息提供装置允许远端站在被基站激励时把关于感兴趣物体以及该远端站的某些情形的信息发射给基站。这可以实时地进行。远端站可以装备有多个发射机应答器，其每一个可以由基站按顺序询问以便提供单独的报告包。
本发明的方法提供与感兴趣物体的远程交互作用，包括提供与之动作相关的远端站和基站，利用在空间从基站发射能量到远端站，并且如此发射的能量被远端站转换为电功率以便激励远端站。
远端站可以装备有多个发射机应答器，其每一个将成为与其他的不同的一个信息源。
该系统消除了在远端站上对电池的需要或者对硬布线系统的使用需要。
本发明的目的是提供一种远端站，它适合于在一个基站发出询问时提供信息给该基站。
本发明的另外一个目的是提供这样一种系统，其中，不需要远端站包括诸如一个电池组之类的一个储能设备，或者是硬布线或或印制电路系统的一部分。
本发明的另外一个目的是提供这样一种系统，其中，在空间发射的能量例如RF功率或者光，在远端站上将被转换成DC功率或AC交流功率以便运转远端站。
本发明的另外一个目的是提供这样一种系统，其中，可以使用RF功率来启动远端站的运行而不管光是否存在。
本发明的另外一个目的是提供这样一种远端站，它将把动态实时测量发射给基站。
本发明的另外一个目的是提供这样一种系统，其中，可能使远端站小型化并且不需要对其频繁的维修。
本发明的另外一个目的是提供这样一种系统，其中，远端站可以具有多个无源智能发射机应答器。
参考附图从本发明的下列说明中将更完整地理解本发明的这些以及其他目的。
图1是本发明的一种形式的示意实例，表示了一个基站，一远端站以及多个信息提供传感器。
图2是可用在本发明中的一个基站的示意实例。
图3是可用在本发明中的一个远端站以及相关的传感器的示意实例。
图4是在远端站中使用多个发射机应答器的本发明的实施例的示意实例。
图5是基站询问器以及询问多个发射机应答器的相应时序的示意实例。
图6是多个心电图传感器和相关的发射机应答器、以及与之空间通信的基站的示意图。
图7是一个基站的示意实例，该基站与一个传感器和远端站的组合进行空间通信，该组合连接于病人的手上以对其进行监测。
正如在此所使用的，术语″感兴趣物体″是指远端站可从其中获得信息的任何有生命的或者没生命的物品。
正如在此所使用的，术语″在空间″是指能量或者信号通过空气或者类似的媒质被发射而不管该发射是否在或者部分在一个界限之内，这与一个硬布线或者印刷电路板的电能传输相反。
正如在此所使用的，术语″病人″是指包括人类在内的动物领域的成员。
参见图1，这里表示了促进遥测和/或感测的本发明的装置的示意实例。基站2在远端站4的通信距离D之内。以在下文中描述的方式，基站2发射可以是RF功率、光、声、磁或者空间发射的或者″辐射的″能量的其他适当形式的能量，例如，其通常通过到远端站4的虚线8来表示。在远端站4内，接收能量被转换成DC功率，其服务来运转该远端站4。在说明的该形式中，感兴趣物体12具有与之动作相关的多个传感器16、18、20，并且通过线路24、26、28分别地传送传感器阅读给远端站4其远端站4按照在此所描述的方式通过由双头箭头30表示的空间依次把数据发射给基站2。传送给远端站4的功率通过导线24、26、28也可以激励传感器16、18、20。RF能量不用导线24、26、28也可以激励传感器16、18、20。距离D将根据系统的设计参数而改变并且依靠本申请，可以为几毫米，好几英尺或者好几光年。虚线箭头30还表示从基站2发射给远端站4的数据。
本发明的一个优点是远端站4的能源是基站2，所以，不需要与远端站4硬布线或者印制电路物理连接。也不需要远端站4携带诸如电池组之类的电存储设备。结果，远端站4的激活和激励将通过基站2的激活来实现。结果，将不需要为了检查电池组量以及更换电池组或者其他电源来对远端站4进行定期维修。这也促进远端站被封装在一个适当的保护材料内部，例如树脂塑料。例如，均聚物(包括热塑性聚合物在内)、合成橡胶以及二氧化硅是用于此类用途的合适材料。另外，这促进了远端站的小型化以及把远端站置于不需要轻易接近的机能上理想的位置中。该远端站，例如，可以被嵌入病人体中。
应该理解，例如，基站2可以询问远端站4以便通过远端站4提供诸如16、18、20之类的电或机械的传感器的阅读，其与远端站4动作相关。
更详细地参见图2，这里表示可用在本发明中的一种形式的基站2的示意图。在所表示的形式中，通过120VAC应用电源40激励基站2，虽然如果期望的话，可以使用例如电池、交流发电机以及逆变器之类的其他电源。电源与电源供给42通信并向其提供功率，电源供给42反过来以期望的电平发射DC功率用于基站2的操作。如果期望的话，可以使用AC交流功率来激励远端站4。微控制器50，其可以采取微处理器或者智能微芯片的形式，其接收来自模拟到数字变换器的输入，一个转换器使用一电子装置(例如声音、光、温度、湿气等等)或者存储器中的一个程序，硬布线逻辑，应用特定的集成电路(ASCI)，从无线链路，卫星或电缆，例如在TV中。
计算机52，其可以是任何种类的个人计算机或调制解调器(如果该单元在一个网络上的话)，通过串行接口54提供与微控制器50的双通道通信。数据记录器存储器58与微控制器50双通道通信以及操作来向微控制器50提供任何期望的比较标准、基础数据以及校准信息。键区和显示器60与微控制器50双通道通信而且向微控制器50提供键区输入并显示通过基站2获得的信息。
基站2具有一ISM(工业、科学、医学)频带天线70，响应于从微控制器50接收的信号，该天线70发射由ISM功率发射机72发射的RF信号。
这服务来在空间向远端站4发射RF功率。在此情况下光是发射能量。发射能量源例如可以是太阳、房间灯光、(白热的或者日光灯)或者激光。此单向传输由图1中的虚线箭头线8来表示。
基站2具有数据发送机74，它具有由数据频带天线76发射给远端站4的数据。所发射的数据可以是控制、配置、识别以及处理形式的此类数据。
微控制器50控制数据发射机74。数据接收机80通过数据频带天线76接收来自远端站4的数据并把相同的引入微控制器50中。
应该理解，以这种方式提供给基站2的功率不仅服务来操作基站2，而且提供这样的装置：用于在空间把能量发射给远端站4以便操作相同的并且发射数据给远端站4以及从远端站4接收数据。
更详细地参见图3，这里表示了远端站4的一种形式，在所表示的形式中，它与感测感兴趣物体的测量传感器90协作，通过一个传感器接口92，与最好具有一个非易失存储器的微控制器94相互作用然后通过一个模拟到数字变换器，引导数字测量设备或者另外一个抽样设备，提供数字输入到微控制器94中。此微控制器94控制远端站4的操作。双频带谐振天线100接收来自基站2的功率传输和数据传输。在转换器102中的接收功率传输，它把RF功率转换为DC功率，其服务来激励远端站4。在可选办法中，用于把RF功率转换为AC功率的设备可以被使用来激励远端站4。这一点替代了对提供硬布线系统的需要或者对在远端站上具有一功率存储设备的需要。从基站2接收的数据由天线100传送给数据接收机108，其又把相同的数据传送给微控制器94。此数据启动远端站4的一个运行周期并担任询问装置。该数据还可以是用于控制诸如ON/OFF切换、校准遥控或者配置控制之类的其他功能的数据。
由微控制器94处理并按照从测量传感器90中所表示的形式接收的数据由数据发送机110通过双频带谐振天线100被发射到基站2，如图1中的双头虚线箭头30所示。因此，应该理解，相对于基站2，远端站4的配置将很大程度上取决于所希望的应用并且将包括如下系统设计：提供足够的RF功率和足够的天线性能以便保持远端站4的所期望的功率电平以及保持远端站4与基站2之间的有效的数据通信。
对于本领域的技术人员来说，很多端使用应用将是显而易见的。例如，在许多应用中，图1中的距离D将不足20尺。在医学应用中，例如，传感器16、18、20可以是EKG传感器，每个都具有一个安装在其中的传感器或者与之动作相关的多个远端站可以被应用到感兴趣物体12(在这种情况下，感兴趣物体12应该是一个病人)中，以便不需要提供导线。在可选办法中，在如图1所示的形式中，在远端站4和基站2之间不需要提供导线。在其中使用了传感器或者信息聚集装置的许多其他类型的医学应用可以受益地使用本发明，例如心脏监视器，脑监视器，脉搏监视器，血压监视器，氧监视器，以及监视病人性能维持设备的监视器，例如通风机，静脉内的传送系统，肾脏的透析机器，氧补充设备以及心脏旁路设备之类的。依靠端使用，从该系统中除了获得信息的直观描述或者计算机存储或者硬拷贝显示之外，也可能希望具有触发的一个告警。
在本发明的替换实施例中，在制造工艺中监视设备性能或者产品制造的使用可以有利方便地发现本发明的运用。该系统例如也可以被使用于设备的噪声监控以及提供计算机数字控制(CNC)的通信。
在期望进行识别的某些实例中，例如为了安全的目的，远程单元可以提供信息来启动基本单元以便确认物件或个人，正如所表示的。
在零售店中，产品可以具有在其上可靠的本发明的远端站，其在收银机处将传送信息给一基站从而消除对条形码等等的需要。这可以被使用来总计一个具体顾客的费用和存货控制并且保持顾客选择的记录。
这里也可以有包括远端站提供信息给一陆地安装基站的外层空间的应用。
对于本领域的技术人员来说，其他运用将是显而易见的。一个关键特点是该系统消除了对依靠电池和硬布线系统作为激励一个远端站的信号源的需要。促进了对远端站的功率传送以及基站与远端站之间的双通道数据传输。
参见图4，这里表示了与天线124协作以便提供向远端站130功率传送以及双通道数据通信的一个系统，其中具有基站120和它的相关微处理器122，微处理器122可以是一个个人计算机或者调制解调器。如图4所示，这个实施例打算使用多个发射机应答器，例如140、142，其在所表示的形式中数目总和为16。在此实施例中打算每一发射机应答器将与接收一个类型的信息的传感器动作相关并且将促进基站按顺序询问每个发射机应答器140、142以便从那里以每个询问之间的一个适当的时间间隔来接收实时信息。依靠该应用，替代传感器信息，该询问可以确定产品代码或者个人的个人标识。
参见图5，这里表示使用在本发明的系统中的一种相配的通信协议。基站120提供用于识别特定发射机应答器的装置，它是被接收的数据源并且通过按顺序支持每个发射机应答器来那么做。可以把基站120发送的功率信号作为提供用来识别轮询操作开始的一个信号的手段来使用。依靠发射机应答器的系统地址，在一个唯一时刻将发送已发送回的数据。ISM功率询问器148在通常由附图标记149表示的一初始延迟周期之后，是每个发射机应答器，例如在时刻t1与t2之间将被询问的转发器140，以及在时刻t2与t3之间将被询问的发射机应答器142。以这种方式，从各种发射机应答器收到的非连续数据分组将利用识别按顺序提供给源。为了避免碰撞最好在连续的发射机应答器数据分组之间提供一个短滞后时间。来自发射机应答器的数据分组可以包含传感器数据和状态信息。传感器数据应该是通过在上文中描述的系统从传感器提供的信息。状态信息可以包括诸如特定的发射机应答器地址识别、内部直流总线电压以及非连续数字输入(如果期望的话)之类的信息。基础询问器将使用该状态信息来核实通信链路的完整性并且如果有必要的话，则具有改变ISM功率的性能。
参见图6，利用通过RF信号192、200、206与基站184的空间通信的象征性的表述，表示了具有多个传感器和相关远端站190、198、204的一个病人180的略图。在该R/X和X/R表述中，″R″表示接收性能而″X″表示发射性能。
参见图7，这里通过在230到包含一个医学信息(例如脉冲、血压或者温度)的传感器的手部222所图示的RF功率的发射来表示在空间接点中的一个基站220的简图，其与远端站224动作相关。
为了提供对本发明另外的洞察力，将提供一个例子。
联系图1-3讨论的一个系统类型可以具有通过标准商业120VAC应用或者等价的UPS来激励的一个基础询问器单元或者基站。如果ISM功率被限制为16瓦特，那么总的输入功率需要不超过20瓦特。ISM功率发射机72最好将能够输出不足1瓦特或者由微控制器50确定的1、2、4、8或16瓦特的RF能量。这将促进关于程序指令以及设置参数的功率的灵活性。一异步串行端口服务来通过一RS232型接口把基站连接到个人计算机或调制解调器52。一种相配的微控制器50是在商业名称″Intel 8051″下销售的。键区和显示60允许用户从系统的发射机应答器监视测量数据和状态。键区开关允许用户通过一个驱动菜单以各种参数单步执行显示。键区还可以具有一个密码功能以便对于系统参数的限制设置提供安全性。
在一个典型系统配置中，数据记录器存储器58允许基站具有支撑多个发射机应答器设备的能力。一个非易失的存储器易于把时间压制发射机应答器数据记录在一个文件存储器缓冲中，通过串行接口54它可用于数据转向和上载。非易失的存储器可以作为具有一个实时时钟的SRAM模块而直接地接口到微控制器总线。串行接口54允许对个人计算机或者调制解调器的连接。存在于基站中的软件、硬件ASCI或者布线逻辑可以包括用于ASCII站通信协议的驱动器，以便通过一台PC GUI菜单系统可以配置该系统。调制解调器驱动器将允许基站独自存在并应答，而且产生电话通信。通过串行接口54，系统固件，非易失的参数以及数据记录器存储器都是可访问的。电源供给42服务来将120VAC应用输入转换为低压DC以便操作控制电路和RF发射机。电源供给将为逻辑电路输出一个好的调整的5VDC(+-5％)并且输出一个12-24VDC输出来操作ISM功率发射机72。
如图3所示，远端站可以被小型化并且最好具有大约5英寸乘2英寸乘1英寸的最大尺寸。该尺寸可以被减小到使远端站可以嵌入人体中。小型化中的一个限制因素是天线，结果，最好把工作频率提高到与实际的一样高。发射机应答器直径可以大约为0.5英寸并且具有一个大约0.03215英寸的厚度。
远端站不包含功率存储设备，因为所有的功率由基站而来。实验的结果已经表明通过在此描述的系统在远端站中可以获得至少20mw的可用DC功率。发射机应答器具有用于与测量传感器进行接口的直接耦合的模拟输入端。模拟到数字变换器可以具有一个0-2.5 VDC的输入范围。依靠天线有效增益，在远端站处的ISM E电场可能大约是具有特定电场的3V/m。关于遥测链路，通过操作在ISM频带外的一条通信链路来返回数据。基站数据接收机可以具有大约0.5uv/m的一个灵敏度。远端站数据链路RF输出通常将不足10mw，其促进在所要求的范围之上的可靠通信。转换器服务来把ISM RF功率变换为大约3VDC的直流总线电压。耦合到远端站天线中的RF能量是在载频处变化的交流电压。到直流变换器电路的RF把RF交流电压整流并滤波为一个可用的DC形式。整流器和滤波器电路最好具有一个阻抗，该阻抗比具有大约377欧姆的一个特性阻抗的天线的整个天线低几倍，并且整流电路具有一个不足10欧姆的阻抗。使用在远端站中的一个相配的微控制器是在交易名称微芯片PIC下销售的。
因此，应该理解，本发明提供一种有效装置，用于建立一个系统，其中一个基站与一个远端站通过在双方向上交换数据来协作，基站服务来对远端站发射能量，以此用来激励远端站以便允许它的操作。结果，不需要使一个有线系统把远端站与功率源连接或者使它携带一个功率存储单元。这允许可以被嵌入个体中的低或者免维护远程系统，用于其他医学目的，使用在太空、工业、安全以及一个宽范围的其他应用中。使用本发明的装置和方法，所有的这些都以一个简单、有效的方式被完成。
虽然为了公开的简明性，在此把主要注意力引导到使用RF功率作为传送到远端站的能源的一个系统，并且这当前成为首选的方法，但是应该理解，可以使用替换的能源。例如，可以使用具有相配装置的一个光射束，该相配装置用于接收远端站上的光并将它转换为诸如一适当的直流电压之类的应答电输出。转换器设备，例如CMOS或者TTL，可以提供期望电平的电压以及大约毫安级的电流来激励该设备。
鉴于为了说明的目的，在上面已经描述了本发明的详细实施例，本领域的技术人员应该理解不偏离在附加的权利要求中所描述的本发明可以进行很多细节变化。

Claims (46)

1.用于与感兴趣物体进行远程交互作用的装置，包括：
一个远端站，用于从所述感兴趣物体中获得信息，
一个基站，用于在空间中发射能量给所述远端站并与所述远端站通信，以及
所述远端站具有转换装置，响应于所述发射能量的接收，用于激励所述远端站。
2.如权利要求1所述的装置，包括：所述基站具有用于把所述能量作为RF功率发射的装置。
3.如权利要求1所述的装置，包括：所述基站具有用于把所述能量作为光发射的装置。
4.如权利要求2所述的装置，包括用于激励所述基站的一个电源。
5.如权利要求4所述的装置，包括用于控制所述基站操作的第一控制器装置。
6.如权利要求5所述的装置，包括：所述第一控制器装置具有微处理器装置。
7.如权利要求6所述的装置，包括与所述基站动作相关的第一天线装置，用于发射信号到所述远端站并且从所述远端站接收信号。
8.如权利要求6所述的装置，包括与所述远端站动作相关的第二天线装置，用于所述所述第一天线装置接收信号并且发射信号到所述第一天线装置。
9.如权利要求8所述的装置，包括：所述远端站具有用于把所述发射能量转换为激励所述远端站的直流功率的装置。
10.如权利要求9所述的装置，包括：所述远端站具有第二控制器装置，用于处理从所述基站接收的信息并且用于发射信息给所述基站。
11.如权利要求10所述的装置，包括：所述第二控制器装置具有用于从监控所述感兴趣物体的传感器装置中接收信息的装置。
12.如权利要求10所述的装置，包括：所述感兴趣物体是一个病人。
13.如权利要求12所述的装置，包括：所述传感器装置具有监视所述病人的身体状况或者身体功能的装置。
14.如权利要求1所述的装置，包括：所述远端站不具有物理上保证到那的一个功率存储设备。
15.如权利要求1所述的装置，包括：所述基站和所述远端站之间没有有线连接。
16.如权利要求11所述的装置，包括：所述远端站具有至少一个发射机应答器，用于接收由所述传感器装置测量的参数数值并将其发射给所述基站。
17.如权利要求16所述的装置，包括：
所述传感器装置具有多个传感器，和
所述发射机应答器与每个所述传感器动作相关。
18.如权利要求17所述的装置，包括：所述基站具有用于按顺序询问所述发射机应答器的装置。
19.如权利要求18所述的装置，包括：所述基站发射功率信号和数据信号给所述远端站。
20.如权利要求16所述的装置，包括：所述远端站具有大约5英寸乘2英寸乘1英寸的最大尺寸。
21.如权利要求2所述的装置，包括：所述远端站具有用于把所述RF功率转换为直流或交流功率的装置。
22.如权利要求17所述的装置，包括：所述传感器是EKG传感器。
23.如权利要求1所述的装置，包括：所述远端站被密封在一个树脂塑料材料内。
24.如权利要求2所述的装置，包括：所述远端站被密封在从包括均聚物、合成橡胶以及二氧化硅在内的分类中选定的一种材料内。
25.用于与感兴趣物体进行远程交互作用的一种方法，包括：
提供一个远端站和与之动作相关的一个基站，
从所述基站在空间中发射能量给所述远端站，以及
把由所述远端站接收的所述能量转换为电功率以便激励所述远端站。
26.如权利要求25所述的方法，包括：把所述能量作为RF功率进行发射。
27.如权利要求25所述的方法，包括：把所述能量作为光进行发射。
28.如权利要求25所述的方法，包括：通过一个电源激励所述基站。
29.如权利要求28所述的方法，包括：在所述远端站把所述发射能量转换为直流功率。
30.如权利要求25所述的方法，包括：在一个感兴趣物体上使用所述方法，该感兴趣物体是一个病人。
31.如权利要求30所述的方法，包括通过传感器装置监控所述病人并把来自所述传感器装置中的信息传送给所述远端站上的至少一个发射机应答器。
32.如权利要求25所述的方法，包括：把所述发射能量作为所述远端站的唯一能源使用。
33.如权利要求25所述的方法，包括：
在所述远端站上使用多个发射机应答器，以及
按顺序询问所述发射机应答器以便把从那里输出提供给所述基站。
34.如权利要求30所述的方法，包括：使用所述方法来监视所述病人的身体状况或者身体功能。
35.如权利要求25所述的方法，包括：从所述基站发射功率信号和数据信号给所述远端站。
36.如权利要求35所述的方法，包括：从所述远端站发射数据信号给所述基站。
37.如权利要求36所述的方法，包括：使用不具有能力存储设备的一个所述远端站。
38.如权利要求37所述的方法，包括：使用天线装置用于在所述基站和所述远端站之间通信。
39.如权利要求38所述的方法，包括：使用一个远端站，具有大约5英寸乘2英寸乘1英寸的最大尺寸。
40.如权利要求37所述的方法，包括：使用第一微处理器装置来控制所述基站的操作。
41.如权利要求40所述的方法，包括：使用第二微处理器装置来控制所述远端站。
42.如权利要求41所述的方法，包括：使用传感器装置，其发射一个电信号给所述发射机应答器。
43.如权利要求30所述的方法，包括：把所述远端站定位在所述基站的20尺之内。
44.如权利要求25所述的方法，包括：使用所述方法来确认感兴趣物体的标识。
45.如权利要求44所述的方法，包括：在一个安全系统中使用所述方法。
46.如权利要求28所述的方法，包括：在所述远端站处把所述发射能量转换为交流功率。
CN99815745A 1998-12-22 1999-12-21 用于激励一个远端站的装置以及相关方法 Pending CN1333669A (zh)

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