JP6192436B2 - 曲げセンサー - Google Patents
曲げセンサー Download PDFInfo
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- JP6192436B2 JP6192436B2 JP2013174591A JP2013174591A JP6192436B2 JP 6192436 B2 JP6192436 B2 JP 6192436B2 JP 2013174591 A JP2013174591 A JP 2013174591A JP 2013174591 A JP2013174591 A JP 2013174591A JP 6192436 B2 JP6192436 B2 JP 6192436B2
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- elastomer
- magnetic
- magnetic filler
- sensor
- uneven distribution
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Description
前記エラストマーが曲げ変形することで生じた磁気変化を検出する複数個の磁気センサーと、
から構成されることを特徴とする曲げセンサーを提供する。
図1は、本発明の曲げセンサーの断面を表す模式図であって、曲げが無い場合(図1左側)と曲げがある場合(図1右側)を模式的に表している。尚、図2〜3については、実施例中で説明する。
作製したエラストマーをカミソリ刃で切り出し、サンプル断面をデジタルマイクロスコープにて100倍で観察した。得られた画像を画像解析ソフト(三谷商事社製WinROOF)を用いて、エラストマーの厚み方向に3等分し上段層、中段層、下段層の磁性フィラーの粒子数をカウントした。各層の粒子数と、中段層の粒子数との比率を求める事で、各層の磁性フィラー存在率を求めた。さらに、[上段層の磁性フィラー存在率]−[下段層の磁性フィラー存在率]を求めることにより偏在度とした。ここで、上段層とは図1の曲げセンサーにおける上面側の層である。
基板に磁気センサーとしてホール素子(旭化成エレクトロニクス社製EQ−430L)を図2のように3個エラストマー上に設置する。図2において、10が磁気センサーAで、11が磁気センサーBで、12が磁気センサーCであり、エラストマー13の端部14を矢印15の方向に上げていき、矢印の各角度16で磁気センサーの出力電圧を読み取ることで曲げセンサー特性を得た。また、表1には、センサー感度の評価として、曲げ角度90°の時の各ホール素子の出力変化率の値の和を出力和(ΔVout)として指標としたものを記載した。この90°の時のセンサーの出力和の値が高いほどセンサー感度が良好であると考えられる。磁気センサーの各角度での出力和をグラフ化して図3に表した。
2…磁気センサー
3…磁性フィラー
10…磁気センサーA
11…磁気センサーB
12…磁気センサーC
13…エラストマー
14…エラストマーの端部
15…エラストマーの端部を上げる方向
16…エラストマーの端部を上げる角度
Claims (5)
- 磁性フィラーを含むエラストマーと、
前記エラストマーが曲げ変形することで生じた磁気変化を検出する複数個の磁気センサーと、
から構成され、
前記磁性フィラーがエラストマー中で偏在しており、その偏在度が1〜100であり、
前記偏在度は、エラストマーの厚み方向に3等分し上段層、中段層、下段層の磁性フィラーの粒子数をカウントし、上段層および下段層の粒子数と、中段層の粒子数との比率を求めて、上段層および下段層の磁性フィラー存在率を求め、以下の式:
偏在度=[上段層の磁性フィラー存在率]−[下段層の磁性フィラー存在率]
から決定することを特徴とする曲げセンサー。 - 前記磁性フィラーがエラストマーの片面側に偏在していて、その偏在面と反対側に複数の磁気センサーを配置する請求項1記載の曲げセンサー。
- 前記磁性フィラーが希土類系、Fe系、Co系、Ni系、酸化物系であり、平均粒径が0.02〜500μmである請求項2記載の曲げセンサー。
- 前記磁性フィラーがエラストマー100重量部に対して1〜450重量部の量で添加される請求項1〜3のいずれか1項に記載の曲げセンサー。
- 前記エラストマーがポリウレタンエラストマーまたはシリコーンエラストマーである請求項1〜4のいずれか1項に記載の曲げセンサー。
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