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目前国内生产的各种型号工业用X光机的“中心指示器”全部是拉杆式。缺点:第一在使用过程中易折断,第二当拉杆成水平透照位置时,因下坠而使指示不准确。根据此缺点,可用电筒(大小均可)取代拉杆,将电筒尾部粘合在原拉杆的基部(粘合剂用树脂万能胶)这样由原拉杆式“中心指示器”改为光电式,“中心指示器”。改进后的中心指示器在任何允许透照焦距范围内,光柱投影到被检物上的光点直径不超过3cm,完
At present, the domestic production of various types of industrial X-ray machine’s “center indicator ” are all rod style. Disadvantages: The first in the process of easy to break, the second when the rod into the level of translucent position, due to fall and make the instructions inaccurate. According to this shortcoming, the torch can be replaced by a torch (the size can be) to replace the torch tail at the base of the original drawbars (adhesive resin adhesive) so that the original drawbar type “center indicator ” is changed to photoelectric type “Center indicator ”. Improved center indicator In any allowed transillumination focal length, the light beam projected onto the object to be detected on the spot diameter of not more than 3cm, finished