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    • 12. 发明公开
    • Monitoring the condition of a rotary tool
    • 激光传感器zur Erkennung eines kontinuierlich bewegten Gegenstandes。
    • EP0493908A1
    • 1992-07-08
    • EP91311501.0
    • 1991-12-11
    • EXCELLON AUTOMATION
    • Skunes, Timothy A.Case, Steven K.
    • G05B19/406B23B49/00
    • B23Q17/0909B23B49/001G05B19/4065Y02P90/265
    • A laser based non-contact detection system is disclosed which is useful in automated manufacturing. The sensor system (12) detects the presence or absence of an object that is either rotating or in some other continuous repetitive motion such as a rotating drill bit (42). This device is especially useful for detecting broken or absent drill bits used for drilling printed circuit boards (44). The system (12) projects a laser beam onto the concave face of the flute near the tip of a drill bit (42) and the amount of light which is reflected by the drill bit (42) is sensed by a detector (70). The sensor (12) is located at an angle oblique to the axis of rotation. Due to the rotation of the drill bit, fluctuating electronic signals are produced, detected and analyzed to determine the presence of the drill bit (42). The system (12) automatically compensates for dust, debris and ambient light. Sensor positioning allows for greater drilling machine throughput since there is no need to fully retract the drill bit (42) for breakage or damage detection. The laser beam may be focused into a stripe of light allowing for the detection of rotating drills of differing diameters without refocusing the light source when the sensor (12) is used on a drilling machine using different and interchangeable drill sizes. The system can be used for detecting any continuously revolving object or any object in any other continuous repetitive motion. The presence of the object may be verified after each repetitive motion sequence.
    • 公开了一种基于激光的非接触检测系统,其在自动化制造中是有用的。 传感器系统(12)检测是否存在旋转的物体,或者在诸如旋转钻头(42)的某些其它连续的重复运动中。 该装置对于检测用于钻印印刷电路板(44)的破碎或不存在的钻头特别有用。 系统(12)将激光束投射到钻头(42)的尖端附近的凹槽的凹面上,并且由钻头(42)反射的光量由检测器(70)感测。 传感器(12)位于与旋转轴线倾斜的角度处。 由于钻头的旋转,产生,检测和分析波动的电子信号以确定钻头(42)的存在。 系统(12)自动补偿灰尘,碎屑和环境光。 传感器定位允许更大的钻孔机吞吐量,因为不需要完全缩回钻头(42)用于断裂或损坏检测。 当传感器(12)在使用不同且可互换的钻孔尺寸的钻孔机上时,激光束可被聚焦成允许检测不同直径的旋转钻头而不重新聚焦光源的光条。 该系统可用于在任何其他连续重复运动中检测任何连续旋转物体或任何物体。 可以在每个重复运动序列之后验证物体的存在。