Displacement detecting device based on inner reflector of elliptic cylinder

Abstract

The invention discloses a displacement detecting device based on an inner reflector of an elliptic cylinder. In the device, a convex lens imaging principle is skillfully applied; the detection of the position of a light convergence point is converted into the detection of the most photosensitive point on an linear array photosensitive element by a photoluminescence substance (or a diffuse reflectance material), the inner reflector of the elliptic cylinder and the linear array photosensitive element; and the detection can be carried out only by a computer. The device comprises a point light source laser, a convex lens, the inner reflector of the elliptic cylinder and the linear array photosensitive element, wherein the point light source laser and the inner reflector of the elliptic cylinder are put on the same side of the convex lens; the photoluminescence substance (or the diffuse reflectance material) is coated on a focal line of the inner reflector of the elliptic cylinder; the focal line is superposed with an optical axis of the convex lens; and the linear array photosensitive element is put on the other focal line of the inner reflector of the elliptic cylinder for detecting the displacement of a surface to be detected. The device has the advantages of simple structure, convenient use and high measurement precision.

Description

technical field [0001] The invention relates to the field of photoelectric detection, and uses the principle of optical imaging to detect the relative displacement of an object to be measured, which is a non-contact displacement detection device. Background technique [0002] Photoelectric detection technology is a high-tech non-contact measurement. It uses optical signals as the carrier and photoelectric devices as the basis. By detecting and analyzing the optical signals carrying the geometric or physical quantities of the measured object, the measured object is obtained. The geometric parameters, that is, the optical signal is received by the photoelectric detection device and converted into an electrical signal, the useful information is extracted by the input circuit, the amplification filter and other detection circuits, and then input into the computer through the A / D conversion interface for calculation and processing, and finally displayed or printed out. It is nece...

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Problems solved by technology

[0004] In the above two documents, the former needs to install the transmitter on the object to be measured, and the latter needs to fix the glass ball on the object to be measured. This measurement method is not applicable to many situations.

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