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    • 4. 发明授权
    • Piston stroke digital determination means
    • 活塞冲程数字测定手段
    • US4769538A
    • 1988-09-06
    • US871379
    • 1986-06-06
    • Karl Krieger, deceasedWerner Reinelt
    • Karl Krieger, deceasedWerner Reinelt
    • G01B11/16H03M1/24G01D5/34
    • G01B11/16H03M1/245
    • The invention concerns apparatus for the determination of the length of stroke of a piston in a working cylinder, especially in a hydraulic, walking, mine-roof support. For this purpose a piston shaft is rotatably mounted in one end portion of the working cylinder and extends into a hollow cylindrical piston rod of the piston. Through a pin on the piston or piston rod which engages in a helical guide groove on the piston shaft, the latter is rotated during movements of the piston. The piston shaft is connected to a code plate provided with a pattern of holes and displaceable on rotation of the shaft between light-emitting elements on one side and light-detecting diodes on the other side. The combination of irradiated and darkened light-detecting diodes represents a digitally-detectable binary numeral sequence which corresponds to a specific piston position.
    • 本发明涉及用于确定工作气缸中的活塞的行程长度的装置,特别是在液压行走的矿顶支架中。 为此,活塞轴可旋转地安装在工作缸的一个端部中并延伸到活塞的中空圆柱形活塞杆中。 通过活塞或活塞杆上的销钉,该销钉接合在活塞轴上的螺旋引导槽中,后者在活塞运动期间旋转。 活塞轴连接到具有孔图案的代码板,并且在一侧的发光元件与另一侧的光检测二极管之间可旋转地移动。 照射和变暗的光检测二极管的组合表示对应于特定活塞位置的可数字检测的二进制数字序列。