非接触式二维laser传感器用于三维线位置和张力测量
Contactless 2-dimensional laser sensor for 3-dimensional wire position and tension measurements
摘要：
我们研制了一种非接触式二维激光传感器，它可以在三维空间内测量金属丝的位置，测量精度优于10微米，测量金属丝的张力，测量精度为0.04N。这些测量可以从15厘米的距离进行。该传感器由市售激光指示器、透镜、滤色器和光电二极管组成。在我们的应用中，我们使用了这种激光传感器与自动三维坐标表。对于单个位置测量，激光传感器通过三维坐标表在平面中移动，并确定导线与该平面相交的坐标。平面本身的位置（第三坐标）由测量台的第三轴给出，该轴垂直于该平面。利用LabVIEW软件实现了转台的控制、读数和激光传感器的读数。用直径为0.2 mm和0.3 mm的金属丝确定平面内位置测量的精度。我们使用该传感器的质量保证线电极模块的KATRIN中微子质量实验。我们预计，如果导线更细，则精度至少相当或更好。这种装置可以很好地适合于测量甚至具有多于一个线层的线室几何形状。
英文摘要：
We have developed a contact-free 2-dimensional laser sensor with which the position of wires can be measured in 3 dimensions with an accuracy of better than 10 micrometer and with which the tension of the wires can be determined with an accuracy of 0.04 N. These measurements can be made from a distance of 15 cm. The sensor consists of commercially available laser pointers, lenses, color filters and photodiodes. In our application we have used this laser sensor together with an automated 3 dimensional coordinate table. For a single position measurement, the laser sensor is moved by the 3-dimensional coordinate table in a plane and determines the coordinates at which the wires intersect with this plane. The position of the plane itself (the third coordinate) is given by the third axis of the measurement table which is perpendicular to this plane. The control and readout of the table and the readout of the laser sensor were realized with LabVIEW. The precision of the position measurement in the plane was determined with wires of 0.2 mm and 0.3 mm diameter. We use the sensor for the quality assurance of the wire electrode modules for the KATRIN neutrino mass experiment. We expect that the precision is at least comparable or better if the wires are thinner. Such a device could be well suited for the measurement of wire chamber geometries even with more than one wire layer.
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