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grating displacement sensor


the grating displacement sensor utilizes the moir e fringe phenomenon of the measuring grating for displacement measurement. it mainly consists of components such as a light source, a scale grating, an indicator grating, and a photoelectric device. the photoelectric device receives the moir é fringe intensity signal and processes it through a circuit to obtain the relative displacement of the two gratings. the measurement range is 0.001~10m; the measurement accuracy reaches 0.2~1 μ m/m; the advantages are high measurement accuracy, large range, fast response, digital output, easy implementation of digital measurement and automatic control, high anti-interference ability, and the ability to achieve dynamic measurement; the disadvantages are high environmental requirements, high costs, and the risk of measurement errors when the expansion coefficient of the object being measured is not consistent.



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