JP2013120118A - Inclination sensor and vehicle inclination detection device - Google Patents

Inclination sensor and vehicle inclination detection device Download PDF

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JP2013120118A
JP2013120118A JP2011268050A JP2011268050A JP2013120118A JP 2013120118 A JP2013120118 A JP 2013120118A JP 2011268050 A JP2011268050 A JP 2011268050A JP 2011268050 A JP2011268050 A JP 2011268050A JP 2013120118 A JP2013120118 A JP 2013120118A
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tilt sensor
magnet
pendulum body
case
inclination
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Masatomo Mori
雅友 森
Kenji Nakagaki
賢二 中垣
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Akebono Brake Industry Co Ltd
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Akebono Brake Industry Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive inclination sensor with a compact and simple configuration, and a vehicle inclination detection device.SOLUTION: An inclination sensor 100 comprises a plug member 101, a lid member 102, a pendulum body 103, an inner member 104 made of resin, and a case 105. The pendulum body 103 with a permanent magnet 302 attached to both ends of a semicircle ferromagnetic body 301 mounted in the case 105 in a turnable manner generates a magnetic flux, and a magnetic sensor 304 detects the magnetic flux to detect an inclination.

Description

本発明は、傾斜センサに関し、特に、コンパクトでシンプルな構成で安価な傾斜センサ及び車載の傾斜検出装置に関する。   The present invention relates to an inclination sensor, and more particularly, to an inexpensive inclination sensor and a vehicle-mounted inclination detection device with a compact and simple configuration.

傾斜センサは、任意の検知角度で傾斜を検知するものであり、従来の先行例として、特許文献１〜特許文献５を示す。   An inclination sensor detects inclination by arbitrary detection angles, and shows patent documents 1-patent documents 5 as a conventional prior art.

特許文献１には、自動二輪車の傾斜を精度良く検知可能とし、車種に応じた重量の振り子を低コスト且つ容易に製造し得るとともに、振り子を小型化してセンサ全体を小型化することができる搭乗手段の傾斜センサが記載されている。   Patent Document 1 describes a boarding that can accurately detect the inclination of a motorcycle, can manufacture a pendulum having a weight according to the vehicle type easily and at low cost, and can downsize the pendulum to reduce the size of the entire sensor. Means tilt sensors are described.

また、特許文献２には、振動や外部磁場に対する影響が軽減されると同時に温度変化に対して検出精度の良い傾斜センサが記載されており、特許文献３には、着磁したムーブメントをケースに回動自在に軸支して、ムーブメントが所定の角度以上に回動したことをホール素子によって検知するに際して、何らダンパー機能をもたせることなく車両走行時の振動による誤検知を防止し、車両の傾倒状態の検知を複雑な調整をすることなく容易に応答性良くなすことができる傾斜センサが記載されている。   Patent Document 2 describes a tilt sensor that is less affected by vibrations and external magnetic fields, and at the same time has high detection accuracy with respect to temperature changes. Patent Document 3 uses a magnetized movement as a case. When the movement of the movement is pivotally supported and the movement of the movement more than a specified angle is detected by the hall element, it prevents the vehicle from tilting without causing any false detection due to vibration during vehicle travel without any damper function. A tilt sensor is described that can easily detect the state without complicated adjustments and with good responsiveness.

また、特許文献４には、傾倒センサにおけるムーブメントの動きが良くなって応答性が良くなるとともに、軸を通して車体の振動が伝わることがなくなって安定性が良くなる傾斜センサが記載されており、特許文献５には、検出体である移動体の移動が容易でありながら振動の影響を受けにくく精度が確保でき、簡素な構造で小型化も可能で安価な傾斜センサが記載されている。   Patent Document 4 describes a tilt sensor that improves the movement of the tilt sensor and improves the responsiveness, and also prevents the vibration of the vehicle body from being transmitted through the shaft, thereby improving the stability. Document 5 describes an inexpensive tilt sensor that is easy to move a moving body that is a detection body but is less susceptible to vibrations, can ensure accuracy, can be downsized with a simple structure, and is inexpensive.

特開２００２−３４０５５３号公報JP 2002-340553 A 特開２００１−１２４５４９号公報JP 2001-124549 A 特開２０００−１４６５８０号公報JP 2000-146580 A 特開２００５−４９３２１号公報JP-A-2005-49321 特開２００７−２１２３７７号公報JP 2007-212377 A

しかし、利用分野や用途によって検知したい検知角度が異なる場合は多数存在する。例えば、車載では、異なる車種ごとに検知角度の要求仕様が異なる。   However, there are many cases where the detection angle to be detected differs depending on the application field and application. For example, in a vehicle, the required specification of the detection angle is different for each different vehicle type.

特許文献１に記載の発明では、検知角度の精度は磁石の強弱および使用されるホールＩＣの感度の影響を大きく受けるため、小型化するには問題がある。またホールＩＣ内部にフェライトを使用した部品を使用した場合、磁力が大きすぎると吸着してしまい検知角度誤差となるという課題があった。   In the invention described in Patent Document 1, since the accuracy of the detection angle is greatly affected by the strength of the magnet and the sensitivity of the Hall IC used, there is a problem in miniaturization. Further, when a component using ferrite is used inside the Hall IC, there is a problem that if the magnetic force is too large, the magnetic IC is attracted and a detection angle error occurs.

また、特許文献２記載の発明では、閉磁界を形成するために別部品を配設してヨークとしている。部品点数が増え構造が複雑。着磁の際は、ヨークを配設する前に着磁作業が必要な為、着磁後のヨーク配設は困難となるという課題があった。   In the invention described in Patent Document 2, a separate part is provided to form a yoke in order to form a closed magnetic field. The number of parts increases and the structure is complicated. At the time of magnetization, there is a problem that it is difficult to dispose the yoke after magnetization because a magnetizing operation is required before disposing the yoke.

さらに、例えば、特許文献３、４記載の発明では、振り子が円形に近いと重心が軸中心に近くなり検知角度精度が悪くなり、また、重心を軸よりも下げるために付加錘を使用すると構造が複雑で高価となるという課題があった。また、特許文献５記載の発明では、液体を信頼性高く密封するために金属を使用するが、例えばアルミのような筐体に振り子の軸受けを設けると構造が複雑で金型での製造は困難であるという課題があった。   Further, for example, in the inventions described in Patent Documents 3 and 4, if the pendulum is close to a circle, the center of gravity is close to the center of the axis, so that the detection angle accuracy is deteriorated, and the additional weight is used to lower the center of gravity below the axis. However, there was a problem that it was complicated and expensive. In addition, in the invention described in Patent Document 5, metal is used to seal liquid with high reliability. However, if a pendulum bearing is provided in a housing such as aluminum, the structure is complicated and it is difficult to manufacture in a mold. There was a problem of being.

本発明は、上記課題に鑑みて、コンパクトでシンプルな構成により安価な傾斜センサを提供することを目的とする。   In view of the above problems, an object of the present invention is to provide an inexpensive tilt sensor with a compact and simple configuration.

上記目的を達成するため、本発明の傾斜センサは、ケース内に回動可能に取り付けられた半円形の強磁性体の両端に磁石が取り付けられて磁束を発生する振り子体と、前記磁束の発生を検出する磁気センサとを備えていることを特徴とする。   In order to achieve the above object, the tilt sensor of the present invention includes a pendulum body that generates a magnetic flux by attaching magnets to both ends of a semicircular ferromagnetic body that is rotatably mounted in a case, and the generation of the magnetic flux. And a magnetic sensor for detecting.

また、本発明の傾斜センサは、更に、前記振り子体は、希土類鉄系ボンド磁石、希土類鉄系鉄系焼結磁石、希土類鉄系熱間加工磁石、フェライトボンド磁石、またはフェライト焼結磁石から成る永久磁石が、前記強磁性体に成形加工されたものであることを特徴とする。   Further, in the tilt sensor of the present invention, the pendulum body is composed of a rare earth iron-based bonded magnet, a rare earth iron-based iron sintered magnet, a rare earth iron-based hot worked magnet, a ferrite bonded magnet, or a ferrite sintered magnet. A permanent magnet is formed into the ferromagnetic material.

また、本発明の傾斜センサは、更に、前記振り子体は、希土類鉄系ボンド磁石、希土類鉄系鉄系焼結磁石、希土類鉄系熱間加工磁石、フェライトボンド磁石、またはフェライト焼結磁石から成る永久磁石が、ＳＵＳまたはニッケル等の強磁性体材料から成る前記強磁性体に、２材成形、インサート成形、または接着一体化により成形加工されたものであることを特徴とする。   Further, in the tilt sensor of the present invention, the pendulum body is composed of a rare earth iron-based bonded magnet, a rare earth iron-based iron sintered magnet, a rare earth iron-based hot worked magnet, a ferrite bonded magnet, or a ferrite sintered magnet. A permanent magnet is obtained by molding the ferromagnetic material made of a ferromagnetic material such as SUS or nickel by two-material molding, insert molding, or adhesive integration.

また、本発明の傾斜センサは、更に、前記振り子体の回動範囲規制のためのストッパは、前記ケース内の液体封止のための栓部材を兼用したものであることを特徴とする。   The tilt sensor according to the present invention is further characterized in that the stopper for regulating the rotation range of the pendulum body also serves as a plug member for liquid sealing in the case.

また、本発明の傾斜センサは、更に、前記ケース内に別設された樹脂製のインナ部材に形成されていることを特徴とする。   The tilt sensor according to the present invention is further characterized by being formed on a resin inner member separately provided in the case.

また、本発明の車載の傾斜検知装置は、上記の傾斜センサと、磁気センサもしくはホールＩＣが実装された回路基板部材とが、車両に固定可能な固定部材を設けたケース部材内に収納されていることを特徴とする   In addition, the in-vehicle tilt detection device of the present invention includes the tilt sensor and a circuit board member on which a magnetic sensor or a Hall IC is mounted housed in a case member provided with a fixing member that can be fixed to a vehicle. It is characterized by

本発明によれば、振り子体を半円形とすることで重心位置は軸に対して下方となりまた、ケースも小さくなり安価となる。また、両端に磁石を配設し、中央を強磁性体とすることで磁束密度が急峻なＳＮ切り替わりでありながらピークを低く抑え、磁気センサもしくはホールＩＣのフェライトによる吸着影響が抑えられる。また、強磁性体が近づいても影響が抑えられる。また、振り子自体が磁路を形成するヨークの役割を果たすので別部材を必要としない。また、組立も簡素化できる。   According to the present invention, since the pendulum body is semicircular, the position of the center of gravity is lowered with respect to the axis, and the case is also small and inexpensive. In addition, by arranging magnets at both ends and using a ferromagnetic material at the center, the peak is kept low while the magnetic flux density is abruptly switched by SN, and the influence of adsorption by the magnetic sensor or Hall IC ferrite is suppressed. Moreover, even if the ferromagnetic material approaches, the influence can be suppressed. Further, since the pendulum itself serves as a yoke for forming a magnetic path, no separate member is required. Also, assembly can be simplified.

また、本発明では、半円形の振り子体でもストッパを設けることで倒立も検出できる。また、回転によるチャタリングの抑制が可能であり、ストッパの配設に特別な部材を必要としないので安価となる。   In the present invention, even a semi-circular pendulum body can detect an inverted position by providing a stopper. Further, chattering due to rotation can be suppressed, and a special member is not required for disposing the stopper, so that the cost is reduced.

また、本発明では、振動による誤作動抑止するために液体を封止する場合は、アルミ等の金属筐体を使用し密封信頼性を高めるが、軸受けをアルミの金型成型で行うと高精度成型となり高精度のアルミ成型金型は一般的に高価となる。樹脂等の金型の方が安価であり、液体封入はダンピングの効果だけでなく潤滑油として例えばエンジンオイルの様な高分子油を使用することで、軸と軸受け部の摺動部を円滑に動作させることができ、高価な部材や複雑な構造を必要としない。このことによりインナ部材は安価な樹脂を金型成型で作成が可能である。   In addition, in the present invention, when liquid is sealed in order to suppress malfunction due to vibration, a metal housing such as aluminum is used to improve sealing reliability. However, when the bearing is formed by molding of aluminum, high accuracy is achieved. High-precision aluminum molds are generally expensive because they are molded. Molds such as resin are cheaper, and liquid sealing not only has a damping effect, but also uses a polymer oil such as engine oil as a lubricating oil, so that the sliding part of the shaft and the bearing part can be made smooth It can be operated and does not require expensive members or complicated structures. As a result, the inner member can be produced by molding an inexpensive resin.

図１は本発明の実施例１の傾斜センサの分解斜視図である。1 is an exploded perspective view of a tilt sensor according to a first embodiment of the present invention. 図２は本発明の実施例１の傾斜センサの組立図である。FIG. 2 is an assembly diagram of the tilt sensor according to the first embodiment of the present invention. 図３は本発明の実施例１の傾斜センサを傾斜させたときの変化を示す図である。FIG. 3 is a diagram illustrating a change when the tilt sensor according to the first embodiment of the present invention is tilted. 図４は本発明の実施例１の傾斜センサを組み込む車載の傾斜検出装置の分解斜視図である。FIG. 4 is an exploded perspective view of an in-vehicle tilt detection apparatus incorporating the tilt sensor according to the first embodiment of the present invention. 図５は本発明の実施例２の傾斜センサを組み込んだ車載の傾斜検出装置の組立図である。FIG. 5 is an assembly diagram of an in-vehicle tilt detection device incorporating the tilt sensor according to the second embodiment of the present invention. 図６は本発明の傾斜センサの振り子体の正面図と側面図である。FIG. 6 is a front view and a side view of the pendulum body of the tilt sensor of the present invention. 図７は本発明の傾斜センサの振り子体の回動と磁束密度の変化の関係を示す図である。FIG. 7 is a diagram showing the relationship between the rotation of the pendulum body and the change in magnetic flux density of the tilt sensor of the present invention. 図８は傾斜センサの振り子体の磁石で形成した従来例の振り子体の回動と磁束密度の変化の示す比較図である。FIG. 8 is a comparative view showing the rotation of the conventional pendulum body formed by the pendulum magnet of the tilt sensor and the change in magnetic flux density. 図９は本発明の傾斜センサの振り子体とストッパとの関係を示す図である。FIG. 9 is a diagram showing the relationship between the pendulum body and the stopper of the tilt sensor of the present invention. 図１０は本発明の振り子体の回動と磁束密度の変化とストッパとの関係を示す図である。FIG. 10 is a diagram showing the relationship between rotation of the pendulum body, change in magnetic flux density, and stopper according to the present invention. 図１１は本発明の樹脂インナ部を設けた実施例と従来例との違いを説明する図である。FIG. 11 is a diagram for explaining the difference between the embodiment provided with the resin inner portion of the present invention and the conventional example. 図１２は図８の誤差要因部分の拡大図である。FIG. 12 is an enlarged view of the error factor portion of FIG.

以下、本発明の実施の形態について、図面を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は本発明の実施例１の傾斜センサの分解斜視図である。図１において、傾斜センサ１００は、栓部材１０１と蓋部材１０２と振り子体１０３と樹脂製のインナ部材１０４とケース１０５から構成され、ケース１０５内に回動可能に取り付けられた半円形の強磁性体３０１の両端に永久磁石３０２が取り付けられた振り子体１０３が磁束を発生し、ケース１０５の外部に取り付けられた磁気センサ３０４が磁束発生を検出して傾斜を検出する。   1 is an exploded perspective view of a tilt sensor according to a first embodiment of the present invention. In FIG. 1, the tilt sensor 100 includes a plug member 101, a lid member 102, a pendulum body 103, a resin inner member 104, and a case 105, and is a semicircular ferromagnetic that is rotatably mounted in the case 105. The pendulum body 103 with the permanent magnets 302 attached to both ends of the body 301 generates magnetic flux, and the magnetic sensor 304 attached to the outside of the case 105 detects the magnetic flux generation to detect the inclination.

栓部材１０１と蓋部材１０２とは、例えば、Ａｌなどの金属で形成され、振り子体１０３は、半円形の強磁性体３０１の両端に磁石３０２が形成された構造であり、半円形の振り子体１０３は、回転軸を中心に回動可能である。   The plug member 101 and the lid member 102 are formed of, for example, a metal such as Al, and the pendulum body 103 has a structure in which magnets 302 are formed at both ends of a semicircular ferromagnetic body 301. Reference numeral 103 is rotatable about a rotation axis.

樹脂製のインナ部材１０４には、例えば、ＰＯＭなどの合成樹脂で形成されており、半円形の振り子体１０３の回転軸を支える回転軸受１０６を備えている。また、ケース１０５は、例えば、Ａｌ等の金属で形成され、蓋部材１０２で蓋をされた内部に、振り子体１０３と樹脂製のインナ部材１０４とを収納して、緩衝用の液体が注入され、栓部材１０１で全体が封入される。   The resin inner member 104 is formed of a synthetic resin such as POM, for example, and includes a rotary bearing 106 that supports the rotary shaft of the semicircular pendulum body 103. The case 105 is made of, for example, a metal such as Al, and the pendulum body 103 and the resin inner member 104 are housed inside the lid member 102 and a buffer liquid is injected. The whole is enclosed by the plug member 101.

図２は本発明の実施例の傾斜センサの組立図である。例えば、Ａｌのケース１０５内に、振り子体１０３と樹脂製のインナ部材１０４と緩衝用の液体が封入されており、ケース１０５内で、振り子体１０３が回転軸を中心に回動する。Ａｌのケース１０５、Ａｌの蓋部材１０２、Ａｌの栓部材は、部品の順次組立において液体を高品質に密封するため、例えば、レーザ溶接等で封止する。   FIG. 2 is an assembly diagram of the tilt sensor according to the embodiment of the present invention. For example, a pendulum body 103, a resin inner member 104, and a buffering liquid are sealed in an Al case 105, and the pendulum body 103 rotates around the rotation axis in the case 105. The Al case 105, the Al lid member 102, and the Al plug member are sealed by, for example, laser welding in order to seal the liquid with high quality in the sequential assembly of the parts.

図３は本発明の実施例の傾斜センサを傾斜させたときの変化を示す図である。図３の左は、Ａｌのケース１０５内に、振り子体１０３と樹脂製のインナ部材１０４と緩衝用の液体が封入された傾斜センサ１００が傾斜していない状態の図である。振り子体１０３が下方に位置し、栓部材１０１と蓋部材１０２とが上方に位置している。図３の右図は傾斜センサ１００が右側に９０°傾斜した状態を示しており、栓部材１０１と蓋部材１０２とが右方に位置している。栓部材１０１は振り子体１０３の回動を制限するストッパの役割を果たしており、振り子体１０３の一部と栓部材１０１とが係合して、振り子体１０３は最下方の位置まで移動しない。   FIG. 3 is a diagram showing a change when the tilt sensor of the embodiment of the present invention is tilted. The left side of FIG. 3 shows a state in which the tilt sensor 100 in which the pendulum body 103, the resin inner member 104, and the buffering liquid are sealed in the Al case 105 is not tilted. The pendulum body 103 is located below, and the plug member 101 and the lid member 102 are located above. The right view of FIG. 3 shows a state in which the tilt sensor 100 is tilted 90 ° to the right, and the plug member 101 and the lid member 102 are positioned on the right side. The plug member 101 serves as a stopper for restricting the rotation of the pendulum body 103. A part of the pendulum body 103 and the plug member 101 are engaged, and the pendulum body 103 does not move to the lowest position.

図４は本発明の実施例２の傾斜センサを組み込む車載の傾斜検出装置の分解斜視図である。図４において、車載の傾斜検出装置２００は、磁気センサもしくはホールＩＣが実装された回路基板部材２０１、傾斜センサ１００、ケース部材２０４から構成され、ケース部材２０４には固定部材２０３が設けられている。ケース部材２０４内には、回路基板部材２０１、傾斜センサ１００が収納される。   FIG. 4 is an exploded perspective view of an in-vehicle tilt detection apparatus incorporating the tilt sensor according to the second embodiment of the present invention. In FIG. 4, the in-vehicle tilt detection device 200 includes a circuit board member 201 on which a magnetic sensor or Hall IC is mounted, a tilt sensor 100, and a case member 204, and a fixing member 203 is provided on the case member 204. . In the case member 204, the circuit board member 201 and the inclination sensor 100 are accommodated.

図５は本発明の実施例の傾斜センサ１００を組み込んだ車載の傾斜検出装置の組立図である。ケース部材２０４内には、回路基板部材２０１、傾斜センサ１００が収納されており、ケース部材２０４に設けられた固定部材２０３を車両(図示せず）に固定して、車載の傾斜検出装置２００内の傾斜センサ１００により車両の傾斜を検出する。   FIG. 5 is an assembly diagram of an in-vehicle tilt detection apparatus incorporating the tilt sensor 100 according to the embodiment of the present invention. In the case member 204, the circuit board member 201 and the inclination sensor 100 are housed. The fixing member 203 provided in the case member 204 is fixed to a vehicle (not shown), and the in-vehicle inclination detecting device 200 is inside. The inclination sensor 100 detects the inclination of the vehicle.

図６は本発明の実施例の振り子体の正面図と側面図である。図６において、振り子体１０３は、半円形の強磁性体３０１の両端に磁石３０２，３０２を備えている。強磁性体３０１には回転軸３０３が設けられており、振り子体１０３は回転軸３０３と一体で軸受の中で同時に回動する。強磁性体３０１は、例えばＳＵＳやニッケルなどにより形成され、磁石３０２，３０２とインサート成型されている。   FIG. 6 is a front view and a side view of the pendulum body of the embodiment of the present invention. In FIG. 6, the pendulum body 103 includes magnets 302 and 302 at both ends of a semicircular ferromagnetic body 301. The ferromagnetic body 301 is provided with a rotating shaft 303, and the pendulum body 103 is integrally rotated with the rotating shaft 303 in the bearing. The ferromagnetic body 301 is made of, for example, SUS or nickel, and is insert-molded with the magnets 302 and 302.

磁石３０２，３０２は、例えば、ボンド磁石など金型成型しやすい材料が望ましく、永久磁石全般（希土類鉄系ボンド磁石、希土類鉄系焼結磁石、希土類鉄系熱間加工磁石、フェライト、ボンド磁石、フェライト焼結磁石等）を磁石３０２，３０２として採用することができる。また、強磁性体３０１と磁石３０２，３０２との成形方案としては、２材成形にかぎらず、インサート成形、接着一体化の手法を採用することができる。   For the magnets 302 and 302, for example, materials such as bond magnets that are easy to mold are desirable, and permanent magnets in general (rare earth iron bond magnets, rare earth iron sintered magnets, rare earth iron hot work magnets, ferrites, bond magnets, Ferrite sintered magnet or the like) can be used as the magnets 302 and 302. Further, as a molding method of the ferromagnetic body 301 and the magnets 302 and 302, not only two-material molding but also insert molding and adhesive integration methods can be employed.

図７は本発明の実施例の振り子体の回動と磁束密度の変化の関係を示す図である。図７において、半円形の強磁性体３０１の両端に磁石３０２，３０２を備えた振り子体１０３の周辺近傍に形成される磁束の磁束密度の測定結果を右図に示す。   FIG. 7 is a diagram showing the relationship between the rotation of the pendulum body and the change in magnetic flux density according to the embodiment of the present invention. In FIG. 7, the measurement result of the magnetic flux density of the magnetic flux formed near the periphery of the pendulum body 103 having the magnets 302, 302 at both ends of the semicircular ferromagnetic body 301 is shown in the right figure.

図７に示されるように、振り子中央の強磁性体３０１は磁気回路を構成するヨークの役割となり、磁束密度のピークを押さえ、外部の強磁性体に吸着する誤作動を抑制する。図７の右図に示されるように、振り子体１０３の回転角度が−６０°から＋６０°の範囲で、磁束密度の強さは平坦な値を示している。   As shown in FIG. 7, the ferromagnet 301 at the center of the pendulum serves as a yoke constituting the magnetic circuit, suppresses the peak of the magnetic flux density, and suppresses the malfunction that is attracted to the external ferromagnet. As shown in the right diagram of FIG. 7, the strength of the magnetic flux density shows a flat value when the rotation angle of the pendulum body 103 is in the range of −60 ° to + 60 °.

また、−６０°と＋６０°の近傍では、磁束密度の強さは急激に変化（傾斜が大）しており、この角度で、磁束密度の変化を測定して、傾斜角度を正確に測定することができる、以上のように、振り子中央の強磁性体３０１を配置し、両端に磁石を配置することにより、強磁性体３０１のヨークの作用により磁束密度のピークを低く抑制することと磁束密度のＳＮ切り替わりを急峻とすることを両立させている。   Further, in the vicinity of −60 ° and + 60 °, the intensity of the magnetic flux density changes abruptly (the inclination is large). At this angle, the change in the magnetic flux density is measured, and the inclination angle is accurately measured. As described above, by arranging the ferromagnetic body 301 in the center of the pendulum and arranging magnets at both ends, the peak of the magnetic flux density can be suppressed by the action of the yoke of the ferromagnetic body 301 and the magnetic flux density can be reduced. This makes it possible to make both of the SN switching steep.

図８は、本発明との比較例として、振り子体を磁石で形成した従来例の振り子体の回動と磁束密度の変化を示している。振り子体１０３を磁石材料単体で構成した場合、図８中Ｎ極の磁束密度が増加し、磁気センサ３０４であるホールＩＣや外部強磁性体の影響を受けやすくなり誤作動の原因となる。また、吸着の影響を抑えるために磁束密度を低くすると磁束密度の波形は鈍り、傾斜検知角度の閾値のばらつきが大きくなって好ましくない。   FIG. 8 shows, as a comparative example with the present invention, rotation of a conventional pendulum body in which a pendulum body is formed of a magnet and changes in magnetic flux density. When the pendulum body 103 is composed of a single magnet material, the magnetic flux density of the N pole in FIG. 8 increases, which is easily affected by the Hall IC that is the magnetic sensor 304 and an external ferromagnet, causing malfunction. Further, if the magnetic flux density is lowered in order to suppress the influence of the adsorption, the waveform of the magnetic flux density becomes dull, and the variation in the threshold value of the tilt detection angle becomes unfavorable.

図９は本発明の実施例の傾斜センサの振り子体とストッパとの関係を示す図である。図９において、半円形の強磁性体３０１の両端に磁石３０２，３０２を備えた振り子体１０３は、回転軸３０３の周りを回動する。半円形の振り子体１０３の周辺近傍に形成される磁束の磁束密度は、ケース１０５の外部に配置される磁気センサ３０４であるホールＩＣにより測定される。   FIG. 9 is a diagram showing the relationship between the pendulum body and the stopper of the tilt sensor according to the embodiment of the present invention. In FIG. 9, a pendulum body 103 provided with magnets 302, 302 at both ends of a semicircular ferromagnetic body 301 rotates around a rotation shaft 303. The magnetic flux density of the magnetic flux formed near the periphery of the semicircular pendulum body 103 is measured by a Hall IC that is a magnetic sensor 304 arranged outside the case 105.

図９の右図は、傾斜センサ１００のケース１０５が回転角度３０５だけ左回りに回動した状態を示している。傾斜センサ１００は自重により、回転軸３０３の代わりを鉛直方向下方に回転しようとするが、ケース１０５に設けられたストッパ１０１と傾斜センサ１００の一部が係合することにより、傾斜センサ１００の回動作が制限される。   The right diagram in FIG. 9 shows a state in which the case 105 of the tilt sensor 100 is rotated counterclockwise by the rotation angle 305. The inclination sensor 100 tries to rotate in the vertical direction instead of the rotating shaft 303 by its own weight, but when the stopper 101 provided on the case 105 is engaged with a part of the inclination sensor 100, the inclination sensor 100 rotates. Operation is restricted.

図１０は、本発明の実施例の振り子体の回動と磁束密度の変化とストッパとの関係を示す図である。図１０において、６５°以上１２０以下で傾斜検知を行うと、例えば車両の転倒を検知する場合、振り子体１０３が１２０°以上回転すると磁気センサ３０４であるホールＩＣは通常の出力となってしまう。   FIG. 10 is a diagram illustrating the relationship between the rotation of the pendulum body, the change in magnetic flux density, and the stopper according to the embodiment of the present invention. In FIG. 10, when tilt detection is performed at 65 ° or more and 120 or less, for example, when detecting the fall of the vehicle, if the pendulum body 103 rotates 120 ° or more, the Hall IC that is the magnetic sensor 304 becomes a normal output.

そこで、図９の右図に示すように、ストッパ１０１は磁気センサ３０４であるホールＩＣがＯＮを保持できる位置に設置することが望ましい。例えば、振り子体１０３の回転防止角度は１２０°までの間で止まる様な仕様とし、図１０に示すように、例えば±８０°の回転角度３０５の範囲内で磁束密度を測定するように設定することが望ましい。また、このストッパ１０１として、傾斜センサ１００のケース１０５内に液体を密封する栓部材１０１を兼用することが望ましい。   Therefore, as shown in the right diagram of FIG. 9, it is desirable that the stopper 101 be installed at a position where the Hall IC as the magnetic sensor 304 can be kept ON. For example, the rotation prevention angle of the pendulum body 103 is set so as to stop until 120 °, and as shown in FIG. 10, for example, the magnetic flux density is set within the range of the rotation angle 305 of ± 80 °. It is desirable. Further, it is desirable that the stopper 101 also serves as the stopper member 101 that seals the liquid in the case 105 of the inclination sensor 100.

図１１は本発明の樹脂インナ部１０４を設けた本発明の実施例と、樹脂インナ部１０４を設けない従来例との違いを説明する図である。図１１において、左図の傾斜センサは、栓部材４０１、蓋部材４０２、振り子体４０３、軸受け部であるケース４０４から構成されている。傾斜センサを小型にして行くと軸受け部であるケース４０４の精度は高精度が必要になるが、生産では金型で製作するため精度を出すのは高価となり、また金型の製造自体が困難なものとなる。   FIG. 11 is a diagram for explaining the difference between the embodiment of the present invention in which the resin inner portion 104 of the present invention is provided and the conventional example in which the resin inner portion 104 is not provided. In FIG. 11, the inclination sensor shown in the left figure includes a plug member 401, a lid member 402, a pendulum body 403, and a case 404 that is a bearing portion. If the tilt sensor is made smaller, the accuracy of the case 404 which is a bearing portion is required to be high, but since it is manufactured with a mold in production, it is expensive to produce accuracy, and the mold itself is difficult to manufacture. It will be a thing.

これに対して、本発明では、図１１の右図に示すように樹脂製のインナ部１０４を入れることにより、Ａｌのケース１０５は単純な形状となる。また、図１１の左図に示すように軸受け部である４０４を蓋部材４０２で押さえる構造とすると、蓋部材４０２も複雑な形状が必要となるが、本発明では、図１０の右図に示しように、蓋部材１０２も平板形状で簡素化できる。   On the other hand, in the present invention, the Al case 105 has a simple shape by inserting the resin inner portion 104 as shown in the right figure of FIG. Moreover, as shown in the left figure of FIG. 11, when the structure which presses 404 which is a bearing part with the cover member 402, the cover member 402 also needs a complicated shape, In this invention, it shows in the right figure of FIG. Thus, the lid member 102 can also be simplified in a flat plate shape.

図１２は、図８の誤差要因部分の拡大図である。図１２の拡大図において、グラフの横軸は傾斜センサの角度（ｄｅｇ）を示し、グラフの縦軸は磁束密度の大きさを示している。グラフ上の太線の曲線は、図１１の右側に示される樹脂製のインナ部材１０４を備えた本発明の傾斜センサの測定角度（ｄｅｇ）と磁束密度の大きさを示しており、グラフ上の細線の曲線は、図１１の左側に示される樹脂製のインナ部材のない従来例の傾斜センサの測定角度（ｄｅｇ）と磁束密度の大きさを示している。   FIG. 12 is an enlarged view of the error factor portion of FIG. In the enlarged view of FIG. 12, the horizontal axis of the graph represents the angle (deg) of the tilt sensor, and the vertical axis of the graph represents the magnitude of the magnetic flux density. The bold curve on the graph indicates the measurement angle (deg) and the magnitude of the magnetic flux density of the tilt sensor of the present invention having the resin inner member 104 shown on the right side of FIG. These curves show the measurement angle (deg) and the magnetic flux density of the conventional tilt sensor without the resin inner member shown on the left side of FIG.

図１２において、磁束密度を測定する磁気センサ、例えば、ホールＩＣの感度に製造上、一定幅の感度ばらつきがあるとすると、磁束の変化をこの感度ばらつきの範囲のどこかで検知することになる。例えば、従来例の場合には、ホールＩＣの感度ばらつきの範囲では、磁束密度の変化の傾斜が寝ているため、検知角度は、８ｄｅｇの幅のばらつきを生じてしまう。   In FIG. 12, if the sensitivity of a magnetic sensor for measuring the magnetic flux density, for example, the Hall IC has a certain variation in sensitivity in manufacturing, a change in the magnetic flux is detected somewhere in the range of this sensitivity variation. . For example, in the case of the conventional example, in the range of the sensitivity variation of the Hall IC, the gradient of the change in magnetic flux density lies, so that the detection angle varies in width of 8 deg.

一方、図６及び図７に示した本発明を適用した構造を用いれば、傾斜角度に対する磁束密度の変化が大きく傾斜が急峻なので、ホールＩＣの一定幅の感度ばらつきの範囲内で、傾斜センサの検知角度は２ｄｅｇのばらつき幅で検出できるため、傾斜角度の測定精度を大幅に上昇させることが可能となる。   On the other hand, if the structure to which the present invention shown in FIGS. 6 and 7 is applied is used, the change in magnetic flux density with respect to the tilt angle is large and the tilt is steep. Since the detection angle can be detected with a variation width of 2 deg, it is possible to greatly increase the measurement accuracy of the inclination angle.

１００ 傾斜センサ
１０１ 栓部材
１０２ 蓋部材
１０３ 振り子体
１０４ 樹脂製のインナ部材
１０５ ケース
１０６ 回転軸受
２００ 車載の傾斜検出装置
２０１ 回路基板部材
２０２ 配線用コネクタ
２０３ 固定部材
２０４ ケース部材
３０１ 強磁性体
３０２ 磁石
３０３ 回転軸
３０４ 磁気センサ，ホールＩＣ
３０５ 回動角度
４０１ 栓部材
４０２ 蓋部材
４０３ 振り子体
４０４ ケース DESCRIPTION OF SYMBOLS 100 Inclination sensor 101 Plug member 102 Cover member 103 Pendulum body 104 Inner member made of resin 105 Case 106 Rotating bearing 200 In-vehicle inclination detection device 201 Circuit board member 202 Connector for wiring 203 Fixing member 204 Case member 301 Ferromagnetic body 302 Magnet 303 Rotating shaft 304 Magnetic sensor, Hall IC
305 Rotation angle 401 Plug member 402 Lid member 403 Pendulum body 404 Case

Claims (6)

ケース内に回動可能に取り付けられた半円形の強磁性体の両端に磁石が取り付けられて磁束を発生する振り子体と、前記磁束の発生を検出する磁気センサとを備えていることを特徴とする傾斜センサ。   A pendulum body that generates a magnetic flux by attaching magnets to both ends of a semicircular ferromagnetic body that is rotatably mounted in a case, and a magnetic sensor that detects the generation of the magnetic flux. Tilt sensor. 請求項１に記載の傾斜センサにおいて、
前記振り子体は、希土類鉄系ボンド磁石、希土類鉄系鉄系焼結磁石、希土類鉄系熱間加工磁石、フェライトボンド磁石、またはフェライト焼結磁石から成る永久磁石が、前記強磁性体に成形加工されたものであることを特徴とする傾斜センサ。 The tilt sensor according to claim 1,
The pendulum body is formed of a rare earth iron-based bond magnet, a rare earth iron-based iron-based sintered magnet, a rare-earth iron-based hot-worked magnet, a ferrite-bonded magnet, or a ferrite-sintered magnet. An inclination sensor characterized by being made. 請求項２に記載の傾斜センサにおいて、
前記振り子体は、希土類鉄系ボンド磁石、希土類鉄系鉄系焼結磁石、希土類鉄系熱間加工磁石、フェライトボンド磁石、またはフェライト焼結磁石から成る永久磁石が、ＳＵＳまたはニッケルの強磁性体材料から成る前記強磁性体に、２材成形、インサート成形、または接着一体化により成形加工されたものであることを特徴とする傾斜センサ。 The tilt sensor according to claim 2,
The pendulum body is a rare-earth iron-based bond magnet, a rare-earth iron-based iron-based sintered magnet, a rare-earth iron-based hot-worked magnet, a ferrite-bonded magnet, or a permanent magnet composed of a ferrite-sintered magnet. A tilt sensor, wherein the ferromagnetic material made of a material is molded by two-material molding, insert molding, or adhesive integration. 請求項１に記載の傾斜センサにおいて、
前記振り子体の回動範囲規制のためのストッパは、前記ケース内の液体封止のための栓部材を兼用したものであることを特徴とする傾斜センサ。 The tilt sensor according to claim 1,
The tilt sensor according to claim 1, wherein the stopper for restricting the rotation range of the pendulum body also serves as a plug member for liquid sealing in the case. 請求項１に記載の傾斜センサにおいて、
前記振り子体の軸受は、前記ケース内に別設された樹脂製のインナ部材に形成されていることを特徴とする傾斜センサ The tilt sensor according to claim 1,
The tilt sensor is characterized in that the bearing of the pendulum body is formed on a resin inner member provided separately in the case. 請求項１ないし請求項５のいずれかに記載の傾斜センサと、回路基板部材が、車両に固定可能な固定部材を設けたケース部材内に収納されていることを特徴とする車載の傾斜検知装置。   An in-vehicle inclination detecting device, wherein the inclination sensor according to any one of claims 1 to 5 and the circuit board member are accommodated in a case member provided with a fixing member that can be fixed to a vehicle. .
JP2011268050A 2011-12-07 2011-12-07 Inclination sensor and vehicle inclination detection device Pending JP2013120118A (en)

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CN116587990A (en) * 2023-05-15 2023-08-15 德州锦城电装股份有限公司 Electric automobile terrain auxiliary driving control device and method

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* Cited by examiner, † Cited by third party
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CN116587990A (en) * 2023-05-15 2023-08-15 德州锦城电装股份有限公司 Electric automobile terrain auxiliary driving control device and method
CN116587990B (en) * 2023-05-15 2024-05-14 德州锦城电装股份有限公司 Electric automobile terrain auxiliary driving control device and method

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