JP2014219265A - Magnetic flux vector direction detector - Google Patents
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Abstract
Description
本発明は、受信した電波において磁束のベクトル方向を検出可能な磁束ベクトル方向検出装置に関する。 The present invention relates to a magnetic flux vector direction detecting device capable of detecting the vector direction of magnetic flux in received radio waves.
従来、例えば３軸アンテナ（Ｘ軸アンテナ、Ｙ軸アンテナ、Ｚ軸アンテナ）を備えた電波受信装置が周知である（例えば、特許文献１等参照）。３軸アンテナの電波受信装置の場合、電波を３方向で受信することが可能となるので、電波の受信特性がよくなる。 2. Description of the Related Art Conventionally, a radio wave receiver provided with, for example, a three-axis antenna (X-axis antenna, Y-axis antenna, Z-axis antenna) is well known (see, for example, Patent Document 1). In the case of a three-axis antenna radio wave receiver, radio waves can be received in three directions, so that the radio wave reception characteristics are improved.
図９に、３軸アンテナを備えた電波受信装置のＸ−Ｙ軸における受信電波の座標系を示す。例えば、受信電波のＸ軸方向強度をｘａ、受信電波のＹ軸方向強度をｙａとすると、受信電波を強度でしか測定できない場合、Ｘ−Ｙ軸における受信電波としては、２つのベクトルＲ１，Ｒ２が算出されてしまう。即ち、Ｘ−Ｙ軸における受信電波の正負を区別することができず、ベクトルＲ１，Ｒ２を認識できない問題があった。なお、この問題は、Ｙ−Ｚ軸やＸ−Ｚ軸においても同様に生じる。 FIG. 9 shows a coordinate system of received radio waves on the XY axes of a radio wave receiver provided with a triaxial antenna. For example, if the intensity of the received radio wave is xa and the intensity of the received radio wave in the Y-axis direction is ya, when the received radio wave can only be measured by intensity, the received radio waves on the XY axis are represented by two vectors R1, R2. Will be calculated. That is, there is a problem that the positive and negative of the received radio wave on the XY axis cannot be distinguished, and the vectors R1 and R2 cannot be recognized. This problem also occurs in the YZ axis and the XZ axis.
本発明の目的は、受信電波の磁束のベクトル方向を算出することができる磁束ベクトル方向検出装置を提供することにある。 An object of the present invention is to provide a magnetic flux vector direction detection device capable of calculating the vector direction of the magnetic flux of received radio waves.
前記問題点を解決する磁束ベクトル方向検出装置は、Ｘ軸方向の電波を受信するＸ軸アンテナと、Ｙ軸方向の電波を受信するＹ軸アンテナと、Ｚ軸方向の電波を受信するＺ軸アンテナと、前記Ｘ軸アンテナ及び前記Ｙ軸アンテナに対して４５°傾くアンテナ、及び前記Ｙ軸アンテナ及び前記Ｚ軸アンテナに対して４５°傾くアンテナのうち、少なくとも一方からなる軸傾きアンテナと、前記軸傾きアンテナで受信した電波の強度レベルを用い、受信した磁束においてベクトル成分の正負を算出する磁束ベクトル方向算出部とを備えた。 A magnetic flux vector direction detecting device that solves the above problems includes an X-axis antenna that receives radio waves in the X-axis direction, a Y-axis antenna that receives radio waves in the Y-axis direction, and a Z-axis antenna that receives radio waves in the Z-axis direction. And an axis tilt antenna comprising at least one of an antenna tilted at 45 ° with respect to the X-axis antenna and the Y-axis antenna, and an antenna tilted at 45 ° with respect to the Y-axis antenna and the Z-axis antenna; A magnetic flux vector direction calculating unit that calculates the positive / negative of the vector component in the received magnetic flux using the intensity level of the radio wave received by the tilt antenna is provided.
本構成によれば、Ｘ軸アンテナ、Ｙ軸アンテナ及びＺ軸アンテナに加え、所定の軸に対して４５°傾く軸傾きアンテナを更に設けた。受信電波の磁束のベクトル成分を算出するとき、軸傾きアンテナが追加されれば、磁束のベクトル方向を算出するためのパラメータが１つ増えることとなる。このため、軸傾きアンテナにおける受信電波の強度レベルを用いれば、受信アンテナがＸ，Ｙ，Ｚの３軸のみのときには判別できなかった磁束のベクトル成分の正負が分かる。よって、より詳細な磁束のベクトル方向の情報を得ることが可能となる。 According to this configuration, in addition to the X-axis antenna, the Y-axis antenna, and the Z-axis antenna, an axis tilt antenna that tilts 45 ° with respect to a predetermined axis is further provided. When calculating the vector component of the magnetic flux of the received radio wave, if an axial tilt antenna is added, the parameter for calculating the vector direction of the magnetic flux increases by one. For this reason, if the intensity level of the received radio wave at the axis tilt antenna is used, the sign of the magnetic flux vector component that cannot be determined when the receiving antenna has only three axes of X, Y, and Z can be known. Therefore, it is possible to obtain more detailed information on the vector direction of the magnetic flux.
前記磁束ベクトル方向検出装置において、前記軸傾きアンテナは、前記Ｘ軸アンテナ及び前記Ｙ軸アンテナに対して４５°傾くＸＹ軸アンテナ、及び前記Ｙ軸アンテナ及び前記Ｚ軸アンテナに対して４５°傾くＹＺ軸アンテナの両方からなり、前記磁束ベクトル方向算出部は、前記ＸＹ軸アンテナ及び前記ＹＺ軸アンテナの各々で受信した電波の強度レベルを用いて、受信した磁束のベクトル成分の正負を算出することが好ましい。この構成によれば、Ｘ，Ｙ，Ｚの３軸アンテナに、ＸＹ軸アンテナ及びＹＺ軸アンテナの２つのアンテナを追加したので、磁束のベクトル方向を算出するためのパラメータが更に増えることとなる。よって、磁束のベクトル成分の正負を、より精度よく判定するのに有利となる。 In the magnetic flux vector direction detecting device, the axis tilt antenna includes an XY axis antenna tilted by 45 ° with respect to the X axis antenna and the Y axis antenna, and YZ tilted by 45 ° with respect to the Y axis antenna and the Z axis antenna. The magnetic flux vector direction calculating unit includes both axial antennas, and the magnetic flux vector direction calculating unit calculates the positive / negative of the vector component of the received magnetic flux using the intensity level of the radio wave received by each of the XY axis antenna and the YZ axis antenna. preferable. According to this configuration, since two antennas, the XY axis antenna and the YZ axis antenna, are added to the X, Y, and Z triaxial antennas, the parameters for calculating the vector direction of the magnetic flux further increase. Therefore, it is advantageous to more accurately determine whether the magnetic flux vector component is positive or negative.
前記磁束ベクトル方向検出装置において、前記Ｘ軸アンテナの受信電波の強度レベルをｘ、前記Ｙ軸アンテナの受信電波の強度レベルをｙ、前記Ｚ軸アンテナの受信電波の強度レベルをｚとすると、前記ＸＹ軸アンテナの受信電波の強度レベルを比較する際に使用する第１閾値をＫxy、前記ＹＺ軸アンテナの受信電波の強度レベルを比較する際に使用する第２閾値をＫyzは、 In the magnetic flux vector direction detecting device, when the received radio wave intensity level of the X axis antenna is x, the received radio wave intensity level of the Y axis antenna is y, and the received radio wave intensity level of the Z axis antenna is z, Kxy is a first threshold value used when comparing the received radio wave intensity level of the XY axis antenna, and Kyz is a second threshold value used when comparing the received radio wave intensity level of the YZ axis antenna.
本発明によれば、受信電波の磁束のベクトル方向を算出することができる。 According to the present invention, the vector direction of the magnetic flux of the received radio wave can be calculated.
以下、磁束ベクトル方向検出装置の一実施形態を図１〜図８に従って説明する。
図１に示すように、電波受信装置１には、各々異なる方向の電波を受信可能な複数（本例は５本）のアンテナ２〜６と、アンテナ２〜６で受信した電波を増幅や変調等してデータ読み取りする受信制御回路７とが設けられている。本例のアンテナ２〜６は、５軸（Ｘ軸、Ｙ軸、Ｚ軸、ＸＹ軸、ＹＺ軸）のアンテナからなり、Ｘ軸アンテナ２、Ｙ軸アンテナ３、Ｚ軸アンテナ４、ＸＹ軸アンテナ５及びＹＺ軸アンテナ６を備える。なお、ＸＹ軸アンテナ５及びＹＺ軸アンテナ６が軸傾きアンテナの一例である。
Hereinafter, an embodiment of a magnetic flux vector direction detection device will be described with reference to FIGS.
As shown in FIG. 1, the radio wave receiving apparatus 1 includes a plurality of (5 in this example) antennas 2 to 6 that can receive radio waves in different directions, and amplifies and modulates radio waves received by the antennas 2 to 6. And a reception control circuit 7 for reading the data in the same manner. The antennas 2 to 6 in this example are antennas of five axes (X axis, Y axis, Z axis, XY axis, YZ axis), and are an X axis antenna 2, a Y axis antenna 3, a Z axis antenna 4, and an XY axis antenna. 5 and a YZ axis antenna 6. The XY axis antenna 5 and the YZ axis antenna 6 are examples of an axial tilt antenna.
図２に、５軸のアンテナ２〜６によって構築される座標軸を示す。Ｘ軸、Ｙ軸及びＺ軸は、互いに９０度の角度をなす軸である。ＸＹ軸は、Ｘ軸及びＹ軸の各々に対して４５度傾く軸に設定されている。また、図示はしないが、ＹＺ軸も同様に、Ｙ軸及びＺ軸の各々に対して４５度傾く軸に設定されている。 FIG. 2 shows coordinate axes constructed by five-axis antennas 2-6. The X axis, the Y axis, and the Z axis are axes that form an angle of 90 degrees with each other. The XY axis is set to an axis inclined by 45 degrees with respect to each of the X axis and the Y axis. Although not shown, the YZ axis is similarly set to an axis inclined by 45 degrees with respect to each of the Y axis and the Z axis.
図１に示すように、受信制御回路７には、電波を各アンテナ２〜６で受信した際の強度レベルを測定する受信強度レベル測定部８と、受信した磁束においてベクトル成分（Ｘ，Ｙ，Ｚ）の正負を判別する磁束ベクトル方向判別部９と設けられている。磁束ベクトル方向判別部９は、Ｘ軸アンテナ２、Ｙ軸アンテナ３、Ｚ軸アンテナ４、ＸＹ軸アンテナ５及びＹＺ軸アンテナ６の受信電波の強度レベルを基に、受信電波において、Ｘ−Ｙ軸平面における磁束のベクトル方向、Ｙ−Ｚ軸平面における磁束のベクトル方向、及びＸ−Ｚ軸平面における磁束のベクトル方向を判別する。なお、受信強度レベル測定部８及び磁束ベクトル方向判別部９が磁束ベクトル方向算出部の一例である。 As shown in FIG. 1, the reception control circuit 7 includes a reception intensity level measurement unit 8 that measures an intensity level when radio waves are received by the antennas 2 to 6, and a vector component (X, Y, Z) is provided with a magnetic flux vector direction discriminating section 9 for discriminating between positive and negative. The magnetic flux vector direction discriminating unit 9 uses the X-Y axis in the received radio wave based on the received radio wave intensity levels of the X axis antenna 2, the Y axis antenna 3, the Z axis antenna 4, the XY axis antenna 5, and the YZ axis antenna 6. The vector direction of the magnetic flux in the plane, the vector direction of the magnetic flux in the YZ axis plane, and the vector direction of the magnetic flux in the XZ axis plane are determined. The reception intensity level measurement unit 8 and the magnetic flux vector direction determination unit 9 are examples of the magnetic flux vector direction calculation unit.
次に、図１，図３〜図８を用いて、磁束のベクトル方向において正負の算出手順を説明する。
［磁束ベクトル方向の判別処理］
図１に示すように、電波受信時、受信強度レベル測定部８は、５軸のアンテナ２〜６における受信電波の各々の強度レベルを測定する。即ち、受信強度レベル測定部８は、Ｘ軸アンテナ２の強度レベル「ｘ」と、Ｙ軸アンテナ３の強度レベル「ｙ」と、Ｚ軸アンテナ４の強度レベル「ｚ」と、ＸＹ軸アンテナ５の強度レベル「ｘｙ」と、ＹＺ軸アンテナ６の強度レベル「ｙｚ」とを測定する。
Next, a procedure for calculating positive / negative in the vector direction of the magnetic flux will be described with reference to FIGS.
[Flux vector direction discrimination processing]
As shown in FIG. 1, at the time of radio wave reception, the reception intensity level measurement unit 8 measures the intensity level of each reception radio wave at the 5-axis antennas 2 to 6. That is, the reception intensity level measuring unit 8 includes the intensity level “x” of the X axis antenna 2, the intensity level “y” of the Y axis antenna 3, the intensity level “z” of the Z axis antenna 4, and the XY axis antenna 5. The intensity level “xy” and the intensity level “yz” of the YZ axis antenna 6 are measured.
図３に示すように、例えばＸ−Ｙ軸平面における磁束のベクトル方向（以降、Ｘ−Ｙ磁束ベクトル方向と記す）は、３軸アンテナの従来の場合、２つのＸ−Ｙ磁束ベクトルＢxy1，Ｂxy2としてしか算出できない。本例の磁束ベクトル方向判別部９は、受信した磁束のＸ−Ｙ軸平面におけるベクトル方向が、２つのＸ−Ｙ磁束ベクトルＢxy1，Ｂxy2のうち、どちらのベクトル成分であるのかを判別する。 As shown in FIG. 3, for example, the vector direction of magnetic flux in the XY axis plane (hereinafter referred to as XY magnetic flux vector direction) is two XY magnetic flux vectors Bxy1, Bxy2 in the conventional case of a three-axis antenna. Can only be calculated as The magnetic flux vector direction discriminating unit 9 of this example discriminates which vector component of the two XY magnetic flux vectors Bxy1 and Bxy2 is the vector direction in the XY axis plane of the received magnetic flux.
磁束ベクトル方向判別部９は、第１の判定ステップとして、Ｘ−Ｙ軸平面の磁束のベクトル方向を判別する。このとき、磁束ベクトル方向判別部９は、次式(1)を用いて、Ｘ−Ｙ軸判定用の閾値Ｋxyを算出する。なお、閾値Ｋxyが第１閾値の一例である。 The magnetic flux vector direction discriminating unit 9 discriminates the vector direction of the magnetic flux on the XY axis plane as the first determination step. At this time, the magnetic flux vector direction discriminating unit 9 calculates a threshold value Kxy for XY axis determination using the following equation (1). The threshold value Kxy is an example of the first threshold value.
ここで、図３に示すように、閾値Ｋxyは、例えばＢxy1（Ｂxy2）のベクトル長を直径とする円軌跡において、Ｙ軸上の点からＸＹ軸に下ろした垂線の交点Ｐａに相当する。このため、強度レベル「ｘｙ」と閾値Ｋxyとを比較するということは、いま判別しようとしているＸ−Ｙ磁束ベクトルの頂点からＸＹ軸に下ろした垂線の交点が、交点Ｐａよりも上に位置するのか、或いは下に位置するのかを確認するのと同義である。磁束ベクトル方向判別部９は、「ｘｙ≧Ｋxy」が成立すれば、いま受信している磁束のベクトル方向をＸ−Ｙ磁束ベクトルＢxy1と判定する。一方、磁束ベクトル方向判別部９は、「ｘｙ＜Ｋxy」が成立すれば、いま受信している磁束のベクトル方向をＸ−Ｙ磁束ベクトルＢxy2と判別する。 Here, as shown in FIG. 3, the threshold value Kxy corresponds to, for example, an intersection Pa of a perpendicular line drawn from a point on the Y axis to the XY axis in a circular locus having a diameter of the vector length of Bxy1 (Bxy2). For this reason, comparing the intensity level “xy” with the threshold value Kxy means that the intersection point of the perpendicular line drawn from the vertex of the XY magnetic flux vector to be determined to the XY axis is positioned above the intersection point Pa. It is synonymous with confirming whether it is located below. If “xy ≧ Kxy” is satisfied, the magnetic flux vector direction determination unit 9 determines that the vector direction of the magnetic flux currently received is the XY magnetic flux vector Bxy1. On the other hand, when “xy <Kxy” is satisfied, the magnetic flux vector direction determination unit 9 determines the vector direction of the magnetic flux currently received as the XY magnetic flux vector Bxy2.
図４に示すように、例えばＹ−Ｚ軸平面における磁束のベクトル方向（以降、Ｙ−Ｚ磁束ベクトル方向と記す）は、３軸アンテナの従来の場合、２つのＹ−Ｚ磁束ベクトルＢyz1，Ｂyz2としてしか算出できない。本例の磁束ベクトル方向判別部９は、受信した磁束のＹ−Ｚ軸平面におけるベクトル方向が、２つのＹ−Ｚ磁束ベクトルＢyz1，Ｂyz2のうち、どちらのベクトル成分であるのかを判別する。 As shown in FIG. 4, for example, the vector direction of magnetic flux in the YZ axis plane (hereinafter referred to as YZ magnetic flux vector direction) is two YZ magnetic flux vectors Byz1, Byz2 in the conventional case of a three-axis antenna. Can only be calculated as The magnetic flux vector direction discriminating unit 9 of this example discriminates which vector component of the vector directions of the received magnetic flux in the YZ axis plane is the two YZ magnetic flux vectors Byz1 and Byz2.
磁束ベクトル方向判別部９は、第２の判定ステップとして、Ｙ−Ｚ軸平面の磁束のベクトル方向を判別する。このとき、磁束ベクトル方向判別部９は、次式(2)を用いて、Ｙ−Ｚ軸判定用の閾値Ｋyzを算出する。なお、閾値Ｋyzが第２閾値の一例である。 The magnetic flux vector direction discriminating unit 9 discriminates the vector direction of the magnetic flux in the YZ axis plane as the second determination step. At this time, the magnetic flux vector direction discriminating unit 9 calculates a threshold value Kyz for Y-Z axis determination using the following equation (2). The threshold value Kyz is an example of the second threshold value.
続いて、図５に、受信した磁束のＹ−Ｚ軸平面におけるベクトル方向（以降、Ｚ−Ｘ磁束ベクトル方向と記す）の判別原理を図示する。例えば、図５（ａ）に示すように、Ｘ−Ｙ磁束ベクトル方向がＸ−Ｙ座標系の第１象限及び第３象限を横断する方向をとる場合、座標（ｘ，ｙ）は、（＋，＋）又は（−，−）の組み合わせをとる。図５（ｂ）に示すように、Ｙ−Ｚ磁束ベクトル方向がＹ−Ｚ座標系の第１象限及び第３象限を横断する方向をとる場合、座標（ｙ，ｚ）は、（＋，＋）又は（−，−）の組み合わせをとる。よって、図５（ｃ）に示すように、Ｚ−Ｘ座標系を考えた場合、座標（ｚ，ｘ）は、座標（ｘ，ｙ）＝（＋，＋）と座標（ｙ，ｚ）＝（＋，＋）とによって（＋，＋）が導かれ、座標（ｘ，ｙ）＝（−，−）と座標（ｙ，ｚ）＝（−，−）とによって（−，−）が導かれる。即ち、Ｚ−Ｘ磁束ベクトル方向は、Ｚ−Ｘ座標系において第１象限及び第３象限を横断する方向のベクトルと判定できる。 Next, FIG. 5 illustrates the principle of determining the vector direction of the received magnetic flux on the YZ axis plane (hereinafter referred to as the ZX magnetic flux vector direction). For example, as shown in FIG. 5 (a), when the XY magnetic flux vector direction takes a direction crossing the first quadrant and the third quadrant of the XY coordinate system, the coordinates (x, y) are (+ , +) Or (-,-). As shown in FIG. 5B, when the YZ magnetic flux vector direction is a direction that crosses the first quadrant and the third quadrant of the YZ coordinate system, the coordinates (y, z) are (+, + ) Or a combination of (-,-). Therefore, as shown in FIG. 5C, when a Z-X coordinate system is considered, coordinates (z, x) are coordinates (x, y) = (+, +) and coordinates (y, z) = (+, +) Leads to (+, +), and coordinates (x, y) = (−, −) and coordinates (y, z) = (−, −) lead to (−, −). It is burned. That is, the ZX magnetic flux vector direction can be determined as a vector in a direction crossing the first quadrant and the third quadrant in the ZX coordinate system.
また、図６（ａ），（ｂ）に示すように、Ｘ−Ｙ磁束ベクトル方向がＸ−Ｙ座標系の第１象限及び第３象限を横断する方向をとり、Ｙ−Ｚ磁束ベクトル方向がＹ−Ｚ座標系の第２象限及び第４象限を横断する方向をとる場合を考える。このとき、座標（ｘ，ｙ）は（＋，＋）又は（−，−）の組み合わせをとり、座標（ｙ，ｚ）は（＋，−）又は（−，＋）の組合せをとる。よって、図６（ｃ）に示すように、座標（ｚ，ｘ）は、座標（ｘ，ｙ）＝（＋，＋）と座標（ｙ，ｚ）＝（＋，−）とによって（−，＋）が導かれ、座標（ｘ，ｙ）＝（−，−）と座標（ｙ，ｚ）＝（−，＋）とによって（＋，−）が導かれる。即ち、Ｚ−Ｘ磁束ベクトル方向は、Ｚ−Ｘ座標系において第２象限及び第４象限を横断する方向のベクトルと判定できる。 Further, as shown in FIGS. 6A and 6B, the XY magnetic flux vector direction takes a direction crossing the first quadrant and the third quadrant of the XY coordinate system, and the YZ magnetic flux vector direction is Consider a case in which the direction crosses the second and fourth quadrants of the YZ coordinate system. At this time, the coordinate (x, y) takes a combination of (+, +) or (−, −), and the coordinate (y, z) takes a combination of (+, −) or (−, +). Therefore, as shown in FIG. 6C, the coordinates (z, x) are expressed by the coordinates (x, y) = (+, +) and coordinates (y, z) = (+, −). +) Is derived, and (+, −) is derived from coordinates (x, y) = (−, −) and coordinates (y, z) = (−, +). That is, the ZX magnetic flux vector direction can be determined as a vector in a direction crossing the second quadrant and the fourth quadrant in the ZX coordinate system.
磁束ベクトル方向判別部９は、図５及び図６で説明した原理を用いて、受信電波のＺ−Ｘ軸平面におけるベクトル方向を判別する。以上のようにして、磁束ベクトル方向判別部９は、受信電波において、Ｘ軸、Ｙ軸及びＺ軸の正負を判別する。 The magnetic flux vector direction discriminating unit 9 discriminates the vector direction of the received radio wave on the Z-X axis plane using the principle described with reference to FIGS. As described above, the magnetic flux vector direction determination unit 9 determines whether the X axis, the Y axis, and the Z axis are positive or negative in the received radio wave.
図７に、磁束ベクトル方向のＸ，Ｙ，Ｚの正負の組み合わせをまとめた表１０を図示する。同図に示されるように、磁束のＸ−Ｙ軸平面、Ｙ−Ｚ軸平面及びＺ−Ｘ軸平面の各ベクトル方向の組み合わせは、合計４つパターンをとることが分かる。このように、電波受信時、受信した電波の磁束がＸ，Ｙ，Ｚのどの方向を向くのかを更に細分化して精度よく識別することが可能となる。 FIG. 7 shows a table 10 in which positive / negative combinations of X, Y, and Z in the magnetic flux vector direction are summarized. As shown in the figure, it can be seen that the combinations of the vector directions of the XY axis plane, the YZ axis plane, and the ZX axis plane of the magnetic flux have a total of four patterns. In this way, when receiving radio waves, it is possible to further subdivide the X, Y, and Z directions in which the magnetic flux of the received radio waves is directed and identify with high accuracy.
［電波受信装置の一使用例］
図８に示すように、電波受信装置１は、ある距離離れた送信アンテナ１１から送信される電波を受信するよう動作をとる。本例の電波受信装置１は、受信電波の磁束のベクトル方向を精度よく判別することが可能であるので、磁束ベクトル方向の分布図１２からも分かるように、磁束ベクトル方向を確認することにより、ある程度の精度で自位置を判定することが可能である。また、電波受信装置１は、受信電波の強度レベルも計測可能であるので、強度レベルの分布図１３からも分かるように、強度レベルを確認すれば、ある程度の精度で自位置を判定することが可能である。
[Example of use of radio wave receiver]
As shown in FIG. 8, the radio wave receiving apparatus 1 operates to receive radio waves transmitted from a transmission antenna 11 that is separated by a certain distance. Since the radio wave receiver 1 of this example can accurately determine the vector direction of the magnetic flux of the received radio wave, as can be seen from the distribution diagram 12 of the magnetic flux vector direction, by checking the magnetic flux vector direction, It is possible to determine the own position with a certain degree of accuracy. Further, since the radio wave receiving apparatus 1 can also measure the intensity level of the received radio wave, as can be seen from the intensity level distribution chart 13, if the intensity level is confirmed, the own position can be determined with a certain degree of accuracy. Is possible.
このように、磁束ベクトル方向と強度レベルとを組み合わせれば、電波受信装置１の位置を精度よく判定することができるはずである。そうすれば、送信アンテナ１１が形成する電波のエリアを精度よく形成したり、送信アンテナ１１を少なくしたりできるなどに有利となる。 Thus, if the magnetic flux vector direction and the intensity level are combined, it should be possible to accurately determine the position of the radio wave receiver 1. This is advantageous in that the radio wave area formed by the transmission antenna 11 can be accurately formed, the number of transmission antennas 11 can be reduced, and the like.
本実施形態の構成によれば、以下に記載の効果を得ることができる。
（１）Ｘ軸アンテナ２、Ｙ軸アンテナ３及びＺ軸アンテナ４の各アンテナに対し、軸が４５°傾くＸＹ軸アンテナ５及びＹＺ軸アンテナ６を追加する。電波受信時、Ｘ軸、Ｙ軸、Ｚ軸、ＸＹ軸及びＹＺ軸の５方向の強度レベルを測定し、これら測定値を基に受信電波の磁束のベクトル方向を算出する。このとき、Ｘ−Ｙ軸平面、Ｙ−Ｚ軸平面及びＺ−Ｘ軸平面における磁束のベクトル方向の正負を、ＸＹ軸アンテナ５の強度レベル、及びＹＺ軸アンテナ６の強度レベルを用い、識別する。このため、受信アンテナがＸ，Ｙ，Ｚの３軸のみのときには判別できなかったベクトル成分の正負が分かる。よって、より詳細な磁束のベクトル方向の情報を得ることができる。
According to the configuration of the present embodiment, the following effects can be obtained.
(1) An XY axis antenna 5 and a YZ axis antenna 6 whose axes are inclined by 45 ° are added to the X axis antenna 2, the Y axis antenna 3 and the Z axis antenna 4, respectively. At the time of radio wave reception, the intensity levels in five directions of the X axis, Y axis, Z axis, XY axis, and YZ axis are measured, and the vector direction of the magnetic flux of the received radio wave is calculated based on these measured values. At this time, the positive / negative of the vector direction of the magnetic flux in the XY axis plane, the YZ axis plane, and the ZX axis plane is identified using the intensity level of the XY axis antenna 5 and the intensity level of the YZ axis antenna 6. . For this reason, the positive / negative of the vector component which could not be discriminated when the receiving antenna has only three axes of X, Y, and Z is known. Therefore, more detailed information on the magnetic flux vector direction can be obtained.
（２）追加する受信アンテナは、ＸＹ軸アンテナ５及びＹＺ軸アンテナ６の２つである。よって、磁束のベクトル方向を算出するためのパラメータを多くとることが可能となるので、磁束のベクトル成分の正負を、より精度よく判定するのに有利となる。 (2) The two receiving antennas to be added are the XY axis antenna 5 and the YZ axis antenna 6. Therefore, it is possible to take many parameters for calculating the vector direction of the magnetic flux, which is advantageous for determining the positive / negative of the vector component of the magnetic flux with higher accuracy.
（３）Ｘ−Ｙ軸平面における磁束のベクトル成分の正負は、ＸＹ軸アンテナ５の強度レベルを閾値Ｋxyと比較することで判別し、Ｙ−Ｚ軸平面における磁束のベクトル成分の正負は、ＹＺ軸アンテナ６の強度レベルを閾値Ｋyzと比較することで判別する。そして、明らかとなったＸ−Ｙ軸平面の磁束ベクトルの正負とＹ−Ｚ軸平面の磁束ベクトルの正負との組み合わせから、Ｚ−Ｘ軸平面の磁束ベクトルの正負を判別する。よって、比較的簡素な演算処理により、磁束のベクトル成分の正負を算出することができる。 (3) Whether the vector component of the magnetic flux in the XY axis plane is positive or negative is determined by comparing the intensity level of the XY axis antenna 5 with a threshold value Kxy. It discriminate | determines by comparing the intensity level of the axial antenna 6 with the threshold value Kyz. Then, the positive / negative of the magnetic flux vector on the Z-X axis plane is determined from the combination of the positive / negative of the magnetic flux vector on the X-Y axis plane and the positive / negative of the magnetic flux vector on the Y-Z axis plane. Therefore, the sign of the magnetic flux vector component can be calculated by a relatively simple calculation process.
（４）磁束のベクトル方向の正負が分かれば、ベクトル方向を確認することにより、送信アンテナ１１からの電波を受信したときの自位置を判定することもできる。また、ベクトル方向の正負と受信電波の強度とを組み合わせて位置判定すれば、一層精度よく自位置を判定することができる。ひいては、送信アンテナ１１が形成する通信エリアの精度向上に有利であり、またこれは用意する送信アンテナ１１が少なく済むという利点にも繋がる。 (4) If the sign of the vector direction of the magnetic flux is known, it is possible to determine the own position when the radio wave from the transmitting antenna 11 is received by checking the vector direction. In addition, if the position is determined by combining the positive / negative of the vector direction and the intensity of the received radio wave, the own position can be determined with higher accuracy. As a result, it is advantageous in improving the accuracy of the communication area formed by the transmission antenna 11, and this also leads to the advantage that the number of transmission antennas 11 to be prepared can be reduced.
なお、実施形態はこれまでに述べた構成に限らず、以下の態様に変更してもよい。
・軸傾きアンテナは、ＸＹ軸アンテナ５及びＹＺ軸アンテナ６の何れかであればよい。
・軸傾きアンテナは、Ｘ軸及びＺ軸に各々４５°傾くＺＸ軸アンテナでもよい。
Note that the embodiment is not limited to the configuration described so far, and may be modified as follows.
The axis tilt antenna may be any one of the XY axis antenna 5 and the YZ axis antenna 6.
The axis tilt antenna may be a ZX axis antenna that is tilted by 45 ° with respect to each of the X axis and the Z axis.
・磁束ベクトル方向のＸ，Ｙ，Ｚの正負の算出方法は、軸傾きアンテナで計測される電波の強度レベルを使用したロジックであれば、種々の算出方法が適用可能である。
・磁束ベクトル方向検出装置は、車両の電子キーシステムに使用されることに限らず、種々の機器や装置に適用可能である。
A variety of calculation methods can be applied to X, Y, and Z positive / negative calculation methods in the magnetic flux vector direction as long as the logic uses the intensity level of the radio wave measured by the axis tilt antenna.
The magnetic flux vector direction detection device is not limited to being used in an electronic key system of a vehicle, but can be applied to various devices and devices.
次に、上記実施形態及び別例から把握できる技術的思想について、以下に追記する。
（イ）前記磁束ベクトル方向検出装置において、前記ベクトル方向算出部は、前記軸傾きアンテナで受信した電波の強度レベルを用い、受信した磁束において、Ｘ−Ｙ軸平面の正負、Ｙ−Ｚ軸平面の正負、及びＺ−Ｘ軸平面の正負を各々算出する。
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) In the magnetic flux vector direction detection device, the vector direction calculation unit uses the intensity level of the radio wave received by the axis tilt antenna, and in the received magnetic flux, the positive / negative of the XY axis plane, the YZ axis plane And the positive and negative of the Z-X axis plane are respectively calculated.
（ロ）前記磁束ベクトル方向検出装置において、前記軸傾きアンテナは、２つの直交する軸の２等分線を軸とするアンテナである。 (B) In the magnetic flux vector direction detection device, the axis inclination antenna is an antenna having a bisecting line of two orthogonal axes as an axis.
２…Ｘ軸アンテナ、３…Ｙ軸アンテナ、４…Ｚ軸アンテナ、５…軸傾きアンテナを構成するＸＹ軸アンテナ、６…軸傾きアンテナを構成するＹＺ軸アンテナ、８…磁束ベクトル方向算出部を構成する受信強度レベル測定部、９…磁束ベクトル方向算出部を構成する磁束ベクトル方向判別部、Ｋxy…第１閾値としてのＸ−Ｙ軸判定用の閾値、Ｋyz…第２閾値としてのＹ−Ｚ軸判定用の閾値。 2 ... X-axis antenna, 3 ... Y-axis antenna, 4 ... Z-axis antenna, 5 ... XY axis antenna constituting the axis tilt antenna, 6 ... YZ axis antenna constituting the axis tilt antenna, 8 ... magnetic flux vector direction calculation unit Receiving intensity level measuring unit constituting, 9... Magnetic flux vector direction discriminating unit constituting magnetic flux vector direction calculating unit, Kxy... XY axis determination threshold as first threshold, Kyz. Axis threshold value.
Claims (3)
Ｙ軸方向の電波を受信するＹ軸アンテナと、
Ｚ軸方向の電波を受信するＺ軸アンテナと、
前記Ｘ軸アンテナ及び前記Ｙ軸アンテナに対して４５°傾くアンテナ、及び前記Ｙ軸アンテナ及び前記Ｚ軸アンテナに対して４５°傾くアンテナのうち、少なくとも一方からなる軸傾きアンテナと、
前記軸傾きアンテナで受信した電波の強度レベルを用い、受信した磁束においてベクトル成分の正負を算出する磁束ベクトル方向算出部と
を備えたことを特徴とする磁束ベクトル方向検出装置。 An X-axis antenna that receives radio waves in the X-axis direction;
A Y-axis antenna that receives radio waves in the Y-axis direction;
A Z-axis antenna that receives radio waves in the Z-axis direction;
An axis tilt antenna comprising at least one of an antenna tilted at 45 ° with respect to the X-axis antenna and the Y-axis antenna, and an antenna tilted at 45 ° with respect to the Y-axis antenna and the Z-axis antenna;
A magnetic flux vector direction detecting device, comprising: a magnetic flux vector direction calculating unit that calculates the positive / negative of a vector component in the received magnetic flux using an intensity level of a radio wave received by the axis tilt antenna.
前記磁束ベクトル方向算出部は、前記ＸＹ軸アンテナ及び前記ＹＺ軸アンテナの各々で受信した電波の強度レベルを用いて、受信した磁束のベクトル成分の正負を算出する
ことを特徴とする請求項１に記載の磁束ベクトル方向検出装置。 The axis tilt antenna is composed of both an XY axis antenna inclined at 45 ° with respect to the X axis antenna and the Y axis antenna, and a YZ axis antenna inclined at 45 ° with respect to the Y axis antenna and the Z axis antenna.
The magnetic flux vector direction calculation unit calculates the positive / negative of the vector component of the received magnetic flux using the intensity level of the radio wave received by each of the XY axis antenna and the YZ axis antenna. The magnetic flux vector direction detection apparatus as described.
前記磁束ベクトル方向算出部は、前記ＸＹ軸アンテナの受信電波の強度レベルと前記第１閾値とを比較することにより、磁束ベクトルのＸ−Ｙ軸平面における正負を算出し、前記ＹＺ軸アンテナの受信電波の強度レベルと前記第２閾値とを比較することにより、磁束ベクトルのＹ−Ｚ軸平面における正負を算出し、Ｘ−Ｙ軸の磁束ベクトルとＹ−Ｚ軸の磁束ベクトルとの組み合わせにより、磁束ベクトルのＺ−Ｘ軸平面における正負を算出する
ことを特徴とする請求項２に記載の磁束ベクトル方向検出装置。 If the intensity level of the received radio wave of the X axis antenna is x, the intensity level of the received radio wave of the Y axis antenna is y, and the intensity level of the received radio wave of the Z axis antenna is z, the intensity of the received radio wave of the XY axis antenna The first threshold value used when comparing the levels is Kxy, and the second threshold value used when comparing the intensity levels of the received radio waves of the YZ axis antenna is Kyz,
The magnetic flux vector direction calculation unit calculates the positive / negative of the magnetic flux vector on the XY axis plane by comparing the intensity level of the received radio wave of the XY axis antenna with the first threshold, and receives the YZ axis antenna. By comparing the intensity level of the radio wave and the second threshold value, the positive / negative of the magnetic flux vector in the YZ axis plane is calculated. 3. The magnetic flux vector direction detecting device according to claim 2, wherein the positive / negative of the magnetic flux vector in the Z-X axis plane is calculated.
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| CN105223542A (en) * | 2015-10-23 | 2016-01-06 | 成都九华圆通科技发展有限公司 | A kind of monitoring and direction-finding method of carrying direction-finding equipment based on aircraft |
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| CN105223542A (en) * | 2015-10-23 | 2016-01-06 | 成都九华圆通科技发展有限公司 | A kind of monitoring and direction-finding method of carrying direction-finding equipment based on aircraft |
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