CN1446386A - 带有整体式接线天线的表面声波装置 - Google Patents

带有整体式接线天线的表面声波装置 Download PDF

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CN1446386A
CN1446386A CN01813706A CN01813706A CN1446386A CN 1446386 A CN1446386 A CN 1446386A CN 01813706 A CN01813706 A CN 01813706A CN 01813706 A CN01813706 A CN 01813706A CN 1446386 A CN1446386 A CN 1446386A
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antenna
saw device
sensor cluster
wheel
patch antenna
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J·贝克利
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Sensotech Ltd
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Sensotech Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2241—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in or for vehicle tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
    • B60C23/0433—Radio signals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
    • H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3291—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted in or on other locations inside the vehicle or vehicle body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Remote Sensing (AREA)
  • Computer Security & Cryptography (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Measuring Fluid Pressure (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Waveguide Aerials (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Support Of Aerials (AREA)

Abstract

一种传感器组件，特别适用于车辆轮子上以便检测例如车辆轮胎内的压力，包括一个接线天线(3)和一个SAW装置(2)和一个天线。接线天线包括由电介质衬垫(6)分开的表面积基本相同的导电板(4、5)。SAW装置可以位于板(3、5)之间电介质材料的厚度之内。接线天线可以固定于车辆轮子的轮缘上以便使得一个天线板与轮子的金属相成电容联接从而形成一个延伸的接地面。这种设置方案产生了一种低型传感器/天线组合，它沿轮子的径向具有最大增益。

Description

带有整体式接线天线的表面声波装置
本发明涉及一种具有一个整体式接线天线的SAW装置。
SAW装置已被提出用于许多应用场合，在这些应用中，SAW装置通过物理上远离SAW装置而利用射频链路联接于SAW装置的电路进行查询。举例来说，这种设置方案在英国专利申请GB 2328086A(其中SAW装置用于测量轴的扭转偏斜)和英国专利申请GB 9917579.6(其中SAW装置用于测量轮胎压力)中进行了描述。尽管利用适当设计的包括SAW装置的变换器可以测量众多的物理参数，但是这些装置的应用此前一直受到对将SAW装置连接于其相关的激励和分析电路所需要的天线系统的要求的限制。
在需要SAW装置在机动车辆轮胎内部工作时，上述的这些问题就特别严重。在这类情况中使用SAW装置的一个众所周知的优点是，与其它轮胎压力检测系统不同，SAW装置不需要电池。然而，SAW装置要需要天线来提供与外部电路的通信。此前提出的有单极天线和螺旋天线。然而，这两种天线都具有的问题是它们只有与接地面成直角安放时才能处于最佳工作状态。轮缘为质量很大的金属并且将起接地面的作用。这里的问题是为了便于将轮胎安装于轮缘上，这些类型的天线需要做得很短或者需要进行弯曲以便与轮缘保持平行。无论是哪一种情况，天线的性能和功效都会受到负面影响。
根据本发明的一个方面，SAW装置和接线天线形成为一个整体式传感器以便应用于一个支承表面。
与传统的单极天线和螺旋天线相比，使用接线天线提供了许多优点。接线天线可以形成为一个比较薄的坚固结构，它能易于应用于适当的表面上，例如应用于轮缘或轮胎表面上或者包括于漏气保用轮胎系统中。除了克服了上述与现有技术相关的许多物理安装问题之外，接线天线的辐射模式还使得大多数辐射都沿垂直于接线平面的方向。这种特性可以利用来将天线的增益集中于查询系统的相关天线的方向上。
接线天线已能从现有技术中获知，但是这种天线通常通过可为来自板的反面的同轴馈线的传输线或者通过位于与接线相同的基片上的微波传输带馈线来馈送。不管是哪一种方式，天线提供有链路的电路通常都与天线自身分离。然而，当SAW传感器比较小时，它可以直接集成于接线自身上。另外，天线的接地面通常比接线大很多并且馈线直接连接于接线与接地面之间。然而在这种应用中，优选地，电介质材料在其最上表面上被切成与导电接线相同的尺寸并且在反面也放置着相同尺寸的导电表面，并且馈线被连接于两者之间。由于接线的面积比较大，因此如果要将其对着金属表面(例如轮缘)安装，则在该底板与轮缘之间将会存在较大的电容耦合，即使并不存在直接的电连接。这一点非常有用，因为许多轮缘为防止腐蚀都进行了涂漆，因而要在此处进行连接就需要对轮缘进行特别的操作和改动。
已经对接线天线进行了大量的研究工作，因此有许多不同的标准公式用来在已知理想工作频率的情况下计算所需的物理参数。然而，由于这种应用所需的接线天线与现有标准不同，因此这些公式已经不再适用，尽管它们可用于给出所需尺寸的近似值。可能最重要的尺寸是接线的电长度，因为它设定了其优选工作频率。当作为半波长谐振器和其整数倍数时，接线天线处于最佳工作状态。因此所需的物理长度的近似值可以通过以下公式得出： L = v o 2 · f r · eff 其中：
L      为物理长度，单位为米
vo    为光速，单位为米/秒
fr    为所需的工作频率，单位为赫兹
eff    为基片的有效电介质。
基片的高度对天线的带宽具有决定性影响，而馈送点沿该长度的宽度和距离对天线的输入阻抗具有决定性影响，该输入阻抗可以进行选择以便与SAW传感器的输入阻抗直接匹配。这就省去了对任何另加的匹配元件的需要。
通过参照附图只通过实例给出的对一个优选实施例的以下描述，可以对本发明有更清楚的理解。其中：
图1以透视图示意性示出了本发明的一个优选实施例；以及
图2示出了使用于机动车辆的轮缘上的图1的实施例。
首先请参看图1，所示的装置1包括一个例如为SAW压力变换器的被动式传感器1和一个接线天线3，接线天线3包括一个上导电板4、一个下导电板5和一个电介质材料衬垫6。被动式传感器2通过安装于接线天线的表面上或者物理上安装于导电板4和5之间的天线的结构内部而与接线天线集成起来。
这种组件的各个元件的尺寸根据上面给出的说明来计算。
图2示出了图1的组件1的一种典型应用。这种组件通过适当的方法，例如通过粘合剂而固定于机动车辆的轮缘7上以便起压力传感器的作用。由于底板5和轮缘之间具有较大值的电容耦合，因而底板5与轮缘之间就不需要电接触，因此装置就可以通过粘合剂应用于已有的漆涂层上。接线天线的输送特征能保证天线的最大增益沿轮子的径向延伸，因此置于车辆的轮弧内的互补天线就能够与轮缘上的天线高效地联接。

Claims (10)

1.一种用于提供一种情况的指示的传感器组件，该传感器组件包括：一SAW装置和一天线，SAW装置可以通过射频(RF)信号查询以便提供该情况的值的指示；天线与SAW装置相连接以便接收来自远端查询装置的射频信号并将接收到的信号传送至SAW装置，并且接收来自SAW装置的射频信号并将该信号传送至远端查询装置，其特征在于，天线为一接线天线，并且天线和SAW装置作为一单元预制而成，该单元可以置于要对该情况进行检测的位置上，以便通过查询装置进行远端查询。
2.根据权利要求1所述的传感器组件，其特征在于，接线天线包括两个由一电介质材料板分开的金属板。
3.根据权利要求2所述的传感器组件，其特征在于，这两个金属板的面积彼此相同。
4.根据权利要求3所述的传感器组件，其特征在于，电介质材料板与金属板的面积相同。
5.根据前述权利要求中任一项所述的传感器组件，其特征在于，SAW装置安装于接线天线的表面上。
6.根据权利要求2-4中任一项所述的传感器组件，其特征在于，SAW装置安装于金属板之间的组件中。
7.根据前述权利要求中任一项所述的传感器组件，其特征在于，天线的长度(L)近似为： L = v o 2 · f r · eff 其中：
L      为物理长度，单位为米
vo    为光速，单位为米/秒
fr    为SAW装置的工作频率，单位为赫兹
eff    为基片的有效电介质。
8.一种用于检测车辆轮子/轮胎组件的情况的方法，该方法包括：提供对将被检测的情况敏感的根据前述权利要求中任一项所述的传感器组件；将传感器组件固定于轮子上，将一个接线天线板联接于轮子的金属上；以及通过邻近轮子/轮胎组件安装的查询装置查询传感器组件。
9.根据权利要求8所述的方法，其特征在于，传感器组件附着地固定于轮缘上而接线天线电容耦合于轮子。
10.根据权利要求8或9所述的方法，其特征在于，传感器组件的位置使得接线天线的增益沿轮子/轮胎组件的径向处于最大值。
CN01813706A 2000-08-08 2001-08-08 带有整体式接线天线的表面声波装置 Pending CN1446386A (zh)

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GB0019497.7 2000-08-08
GB0019497A GB2370640A (en) 2000-08-08 2000-08-08 SAW device with integral patch antenna

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EP (1) EP1307943A1 (zh)
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AU (1) AU2001277618A1 (zh)
GB (1) GB2370640A (zh)
WO (1) WO2002013309A1 (zh)

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CN100411244C (zh) * 2004-02-17 2008-08-13 京瓷株式会社 轮胎气压信息发送装置用天线及应用其的装置
CN104185781A (zh) * 2012-04-04 2014-12-03 罗伯特·博世有限公司 用于进行轮胎压力检查的方法和装置
CN106462220A (zh) * 2014-04-03 2017-02-22 惠普发展公司，有限责任合伙企业 电容耦合到天线模块的传感器垫
CN108027292A (zh) * 2015-09-17 2018-05-11 赛峰电子与防务公司 包括压力传感器的用于测量的设备以及用于测量压力的系统

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CN104185781A (zh) * 2012-04-04 2014-12-03 罗伯特·博世有限公司 用于进行轮胎压力检查的方法和装置
CN106462220A (zh) * 2014-04-03 2017-02-22 惠普发展公司，有限责任合伙企业 电容耦合到天线模块的传感器垫
CN106462220B (zh) * 2014-04-03 2020-04-10 惠普发展公司，有限责任合伙企业 电容耦合到天线模块的传感器垫及其制作方法
CN108027292A (zh) * 2015-09-17 2018-05-11 赛峰电子与防务公司 包括压力传感器的用于测量的设备以及用于测量压力的系统

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GB0019497D0 (en) 2000-09-27
AU2001277618A1 (en) 2002-02-18
JP2004506218A (ja) 2004-02-26
WO2002013309A1 (en) 2002-02-14
EP1307943A1 (en) 2003-05-07

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