非接觸式轉向感測方法與裝置(ARTC)

節能電動化車輛關鍵模組技術暨產業化發展計畫

游超智、許騌譁、徐錦衍、葉智榮

本發明係一種非接觸式轉向感測裝置，係於一轉軸上設有二相異極對數量的磁鐵環，由二感磁元件分別感測各磁鐵環的磁場訊號，以及由一控制器記錄轉軸旋轉時的磁場訊號，控制器計算其中一磁場訊號可得該轉軸旋轉的角度，當轉軸受力產生扭轉，使另一磁鐵環的磁場訊號相較未受力時的磁場訊號而產生相位差，控制器經計算轉換該相位差可得轉軸所受力矩值；利用該等磁鐵環的磁場訊號，經控制器計算以分別得到轉軸的力矩與角度，具有結構簡單與低成本的優點，解決現有力矩與角度偵測裝置存在複雜、成本高與訊號易受干擾的問題。

A contactless detection apparatus has a first magnet ring, a second magnet ring, a first magnetic sensor, a second magnetic sensor and a controller. The two magnet rings are respectively mounted on two ends of a torsion shaft. When the torsion shaft rotates, the controller detects the magnetic fields of the two magnet rings through the two magnetic sensors. The controller calculates a twisting torque exerted on the torsion shaft and a rotational angle of the torsion shaft according to the detected magnetic fields at the same time. The detection apparatus of the invention has simple structure. The magnetic fields of both magnet rings do not interfere with each other, such that the detection result of the invention is accurate.