The invention relates to an oil pipe thread size parameter detection method and device. A collimated light source is used for lighting, a bi-telecentric lens and an area array CCD digital camera are used for acquiring an upper section image and a lower section image of the oil pipe thread; image processing software is used for extracting outline sub-pixel edge, and computing geometric parameters of the upper section image and the lower section image. The detection device of the invention is mainly composed of a base, an image acquiring component, and a lifting guide rail mechanism and like components; the image acquiring component is composed of a bracket, two collimated LED light sources, two bi-telecentric lenses, two area array CCD digital monochrome camera and the image acquiring and processing software. By virtue of the collimated light source and the bi-telecentric lens, the parts shape image can be acquired, the image cannot be distorted along the distance in a certain range, the measurement speed is fast, and the high-precision measurement result is obtained.

Oil pipe thread size parameter detection method and device

The invention discloses an indirect measurement based size device for an oil casing. The device comprises a base, wherein the top of the base is provided with two permanent seats; two linear guide rails are fixedly connected between the two permanent seats; the two linear guide rails are provided with a same working platform in a sliding manner; two ends, along the sliding directions of the linearguide rails, of the working platform are both provided with handles; the top of the working platform is provided with an air cylinder; the tail end of a piston rod of the air cylinder is provided with a clamping jaw; the top of the base is fixedly provided with a first upright column, a second upright column and a third upright column; the first upright column is provided with a backlight sourceand a laser detecting head; the laser detecting head is located above the backlight source; the second upright column is provided with a coaxial light source and a first camera; and the first camera is located above the coaxial light source. The device is used for carrying out measurement through an indirect way, and is convenient to operate and simple in structure; and the detection precision andefficiency are improved.

Indirect measurement based size device for oil casing

The utility model relates to an intelligent testing device for area array CCD petroleum tube thread parameters in a non-contact testing system, which has advantages of satisfying test repeatability, high resolution and stability and fast testing speed. The device includes an optical platform frame which is equipped with a collimated illumination light source device, a positioning device and a spectroscopic imaging device. The positioning device includes a rough counterpoint cone-cylinder which is provided with a position sensor and a location reference end face and a location dimension for the external diameter of tube ends. The spectroscopic imaging device includes a beam splitter prism, an imaging lens and a CCD imager.

Planar array petroleum pipeline thread parameter intelligent test device

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Planar array petroleum pipeline thread parameter intelligent test device