用于全周界绝对式轴角传感器的光刻盘

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用于全周界绝对式轴角传感器的光刻盘

本发明是一种用于全周界绝对式轴角传感器的光刻盘，其中心部为一定位圆，在光刻盘的上下表面上加工数条透光测量狭缝，其特征在于：透光测量狭缝中心线对应的测量曲线II分布于光刻盘上下表面的等分的扇形区间内，各条测量曲线II在周向上首尾相续，测量曲线II遵从等角螺线的数学规律，其公式分别为：ρ＝ae k θ ；在紧邻定位圆(2)周围的圆环区间内加工一条用于分辨角度区间的透光定位狭缝(5)，其中心线为定位曲线I，定位曲线I遵从阿基米德曲线的规律，其公式为：ρ＝aθ 0≤θ≤2π。采用该种光刻盘会使轴角传感器具有更加简单实用的机械装配结构和光路，可以达到在全周界的高精度的角度检测。

Photoetchingdisc for full-perimeter absolute shaft-angle sensor

Theinvention provides a photoetching disc for a full-perimeter absoluteshaft-angle sensor. A positioning circle is located in the center of thephotoetching disc, and a plurality of light-transmitting measuring slits areformed in the upper and lower surfaces of the photoetching disc. Thephotoetching disc is characterized in that measuring curves II corresponding tocentral lines of the light-transmitting measuring slits are distributed inequal sector-shaped sections on the upper and lower surfaces of thephotoetching disc, the measuring curves II are connected end to end in thecircumferential direction and comply with the mathematic rule of equiangularspirals, and the formula of the measuring curves II is rho=ae<k theta>;and a light-transmitting positioning slit (5) used for distinguishing anglesections is formed in a circular section closely around the positioning circle(2), the central line of the light-transmitting positioning slit is apositioning curve I which complies with the rule of the Archimedean curve, andthe formula of the positioning curve I is rho=a<theta>, wherein0<=theta<=2 pi. By means of the photoetching disc, the shaft angle sensorcan be provided with simpler and more practical mechanical assemblingstructures and light paths, and full-perimeter high-precision angle detectioncan be achieved.