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Detection device for media with different surface properties

A detection device and technology for surface properties, applied in the field of detection devices for media with different surface properties, can solve the problems of delaying production progress, inability to accurately distinguish between two detection media and output, etc. Accurate effect

Pending Publication Date: 2017-02-08
AMSKY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, neither of the above two solutions can be applied to some wash-free printing plates. The reflectivity and color of the coating surface on the working surface of this type of wash-free printing plate are similar to those of white paper (release paper). Through a single photoelectric sensor, CMOS or CCD detection cannot accurately distinguish between the two detection media. In actual work, judgment errors are often made, and the printing plate cannot be output accurately, which delays the production schedule.

Method used

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  • Detection device for media with different surface properties
  • Detection device for media with different surface properties
  • Detection device for media with different surface properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a detection device for media with different surface properties includes a first photoelectric sensor 4, a second photoelectric sensor 5, an LED lamp 3, a convex lens 6 and a data processor 8, and the convex lens 6 is arranged between the light source 3 and the surface of the medium 1 , so that the incident light emitted by the light source 3 is irradiated obliquely on the medium surface 1 after converging to form an irradiation surface; both the first photoelectric sensor 4 and the second photoelectric sensor 5 are above the medium surface 1, and the first photoelectric sensor 4 is in the irradiated On the center O of the surface and perpendicular to the normal line N direction of the medium surface 1, the second photoelectric sensor 5 is on the symmetric straight line with the normal line as the axis and the connection line between the center of the illuminated surface and the light source; the first photoelectric sensor 4 and the second phot...

Embodiment 2

[0030] Such as figure 2 As shown, a detection device for media with different surface properties includes a first photoelectric sensor 4, a second photoelectric sensor 5, an LED lamp 3, a convex lens 6 and a data processor 8, and the convex lens 6 is arranged between the light source 3 and the surface of the medium 2 , so that the incident light emitted by the light source 3 is converged and irradiated obliquely on the medium surface 2 to form an irradiation surface; both the first photoelectric sensor 4 and the second photoelectric sensor 5 are above the medium surface 2, and the first photoelectric sensor 4 is in the irradiated On the center O of the surface and perpendicular to the normal line N direction of the medium surface 2, the second photoelectric sensor 5 is on the symmetric straight line with the normal line as the axis and the connection line between the center of the illuminated surface and the light source; the first photoelectric sensor 4 and the second photoe...

Embodiment 3

[0033] The light converging device of this embodiment uses a thin and long threaded tube 7 instead of the convex lens 6, and the others are the same as in Embodiment 1.

[0034] For the working principle of this embodiment, reference may be made to Embodiment 1.

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Abstract

The invention relates to a detection device for media with different surface properties. The detection device comprises a light source, a light converging device, a first photoelectric sensor, a second photoelectric sensor and a data processor, wherein the light converging device is arranged between the light source and a medium surface, so that incident light rays emitted by the light source obliquely irradiate the dielectric surface so as to form an irradiation surface after being converged; the first photoelectric sensor and the second photoelectric sensor are positioned above the dielectric surface, the first photoelectric sensor is positioned in a normal direction which passes through the center of the irradiation surface and is vertical to the medium surface, and the second photoelectric sensor is in a straight line which is symmetrical with a connecting line between the center of the irradiation surface and the light source by taking the normal line as an axis. The two photoelectric sensors of the detection device are arranged in two directions, and the media are detected and distinguished according to the reflectivity of medium surfaces, so that the detection device is large in application range, not only applicable to detection on medium surfaces which are different in printing form, but also applicable to other occasions.

Description

technical field [0001] The invention relates to a detection device for media with different surface properties. Background technique [0002] When a beam of parallel light touches the surface of a smooth object, the light is reflected regularly, and the reflected light is also parallel to each other. This regular reflection is called one-way reflection or specular reflection of light. However, the smoothness of an object is relative. If the incident light hits a rough and uneven surface, the reflected light will scatter in all directions. This phenomenon is the diffuse reflection of light. Therefore, when light hits media with different surface properties (smooth or rough), different reflections will occur. [0003] CTP (Computer to Plate) plate making machine is a kind of pre-press equipment in the printing field. At present, the printing plate used by CTP plate making machine is a photosensitive offset printing plate with multi-layer structure and release paper. The photo...

Claims

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Application Information

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IPC IPC(8): G01N21/55G01N21/47
CPCG01N21/4738G01N21/55G01N2021/556
Inventor 唐晖
Owner AMSKY TECHNOLOGY CO LTD