CN203837654U

CN203837654U - Soft medium edge detection device

Info

Publication number: CN203837654U
Application number: CN201420188404.3U
Authority: CN
Inventors: 朱礼尧; 吴涛; 公晓丽
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2014-04-17
Filing date: 2014-04-17
Publication date: 2014-09-17
Anticipated expiration: 2024-04-17

Abstract

The utility model relates to a soft medium edge detection device, which is characterized in that the top part of a light-tight black box is an inclined plane with an angle alpha being reserved between the top part and the horizontal plane, and the middle part close to the bottom part of the inclined plane is provided with a circular hole; each of the central parts of the bottom sides of the front surface and the rear surface of the black box is provided with a rectangular opening so as to be convenient for a medium to be detected to pass through the detection device; each of the central positions of the front and the rear of a black box base is fixedly provided with a strip-shaped wear resistant fixing ring, the middle of a fixing frame is provided with a circular hole, the medium to be detected gets into the rectangular openings of the black box through the circular hole, a stable tensile force is kept when the medium to be detected passes through the detection device with a constant speed, and a light source system is located below the center of the top end of the inclined plane. The soft medium edge detection device provided by the utility model is high in detection precision and not interfered by the surface and the color of an object to be detected, external light or the dirt.

Description

A kind of soft medium edge pick-up unit

Technical field

The utility model provides a kind of edge detecting device of soft medium, is mainly used in soft medium and cuts field.

Background technology

In industrial control field, in a lot of situations, need to detect the marginal position of soft medium (as film, cloth, paper etc.), to guarantee that medium is along correct orbital motion at present.Rim detection is mainly that body form and size are accurately measured.As shown in Figure 1, edge detector comprised light tight black box 101 to disclosed edge detector in the past, and light source production module 102 is parallel to gap 105, linear CCD sensor 106 and the control circuit 107 of black box bottom surface and end face.Wherein light source production module comprises light source 103 and optical male lens 104, and control circuit 107 is directly light source 103 power supplies, and the directional light producing for projection by optical male lens 104.

Testing medium passes edge detecting device from gap 105, under directional light irradiates, resulting real image is mapped to the photosensitive area of linear CCD sensor 106, sensor is by the conversion between photoelectricity, by the electric signal output of each pixel, by control circuit, voltage signal is processed and can be obtained medium edge position data.

In power generation circuit, control circuit is directly light source power supply, once the voltage of edge detecting device is because external influence is floated, be the also just fluctuation thereupon of electric current of light source power supply so, the luminous energy receiving at equivalent environment lower linear ccd sensor is also just different; When extraneous light also can disturb to some extent original light when black box gap 105 enters edge detector inside, these all can affect the accuracy of detection of linear CCD sensor.Owing to there being above-mentioned various error component, adopt the image processing circuit of fixed threshold obviously can increase data error.These factors all will cause final measurement data to occur the result that larger error is even wrong.

Summary of the invention

The purpose of this utility model is to provide a kind of edge detecting device of soft medium, with shortcomings such as overcoming external light source and disturb, dirt is stained, accuracy of detection is poor, and is not subject to the restriction of object under test shape, testing environment.

For achieving the above object, the utility model is achieved through the following technical solutions:

The utility model comprises light tight black box, image capturing system and light-source system, and described light tight black box top is to become the inclined-plane at α angle with surface level, at the center section near bottom, inclined-plane, has a circular hole; For the optical lens of image capturing system is installed, the inner wall of black box is black frosted layer, reduces the impact of reflection ray on measuring accuracy; Before and after black box, base, two sides middle body respectively has a rectangle gap, so that testing medium is through pick-up unit; Each fixes a wear-resisting set collar of strip centre position, black box base front and back, in the middle of fixed frame, there is circular hole, testing medium from then on hole pierces into black box rectangle gap, and guarantee that testing medium is at the uniform velocity when the pick-up unit, keep stable tensile force, described light-source system is positioned at beveled top end central authorities below.

The utility model proposes a kind of accuracy of detection high and be not subject to the edge detecting device of the interference of determinand surface, color and extraneous light, dirt.Adopt the width data of the cut film edge part of camera chain collection to determine the marginate position of the relative cutter of film edge.

Accompanying drawing explanation

Fig. 1 is in the past in utility model embodiment, the structured flowchart of edge detecting device.

Fig. 2 is in the utility model embodiment, edge detecting device structure left view.

Fig. 3 is in the utility model embodiment, edge detecting device part-structure front view.

Fig. 4 is in the utility model embodiment, soft medium cutting schematic diagram.

Fig. 5 is in the utility model embodiment, LED light source structural representation.

Symbol description in figure:

101: light tight black box, 102: light source production module, 103: light source, 104: optical male lens, 105: gap, 106: linear CCD sensor, 107: control circuit, 201: image capturing system shell, 202: signal processing module, 203: sensor driver module, 204: linear CCD sensor, 205: optical lens, 206: light tight black box, 207: light-source system shell, 208: light source driver module, 209: LED light source, 210: medium set collar, 211: gap, 31: rectangle gap, 32: circular hole, 41: soft medium, 42: cutter, 43: testing medium, 51: light emitting diode, 52: astigmatism plate.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

In embodiment of the present utility model, wide soft medium is divided into many narrow media through cutter, cut apart an antemarginal medium (being testing medium) and enter the circular hole of both sides, edge detecting device front and back fixed frame and the gap of bottom, from black box inside, pass, line scan image sensor detects the width of testing medium, thereby determines the relative position of cutting section and soft medium edge.

As shown in Figure 2, as shown in Figure 3, edge detecting device comprises front view (part-structure) the inner structure left view of the utility model embodiment edge detecting device: image capturing system, light-source system 207 and light tight black box 206.Described its upper bottom surface of light tight black box is an inclined-plane that becomes α angle with surface level, before and after black box, there is respectively a rectangle gap 31 on two sides near the center section of bottom, on base below two gap 211, fix a strip medium set collar 210 as shown in Figure 3, in the middle of it, have a circular hole 32, the wall of black box inside and bottom are with black frosted layer.As shown in Figure 4, soft medium 41 is after cutter 42 is cut apart, set collar circular hole by the edge medium 43 after cutting apart before pick-up unit penetrates into the rectangle gap of black box bottom, then through the rectangle gap of opposite side the circular hole from set collar, pass, guarantee that testing medium has stable tensile force in testing process, and detection position is relatively fixing, thereby reduce the error in measuring process.

Described light-source system 207 comprises: light source driver module 208 and LED light source 209.Wherein LED light source consists of a rectangular parallelepiped, as shown in Figure 5, in the present embodiment, light source is comprised of a plurality of light emitting diodes 51, and word order is at rectangular parallelepiped inner top, in the bottom surface relative with light emitting diode, embed astigmatism plate 52 simultaneously, guarantee uniformity coefficient and the depth of parallelism of light.Before fixed L ED light source, should adjust LED light source two ends height, make it slant setting, with horizontal plane angle be β, guarantee that it is α that light-source system emits beam with the formed incident angle in black box bottom surface.Accuracy for guaranteeing to detect in testing process, it is stable that the light intensity of light source must keep, thus a light source driver module of design, for light emitting diode provides an invariable adjustable current.

Described image capturing system is comprised of optical lens 205, linear CCD sensor 204, sensor driver module 203 and signal processing module 202 and image capturing system shell 201.Optical lens and image capturing system shell are combined and are embedded in downside in black box top bevel, and optical lens need be parallel with inclined-plane with linear CCD sensor.Sensor driver module provides operating voltage and suitable drive pulse signal for linear CCD sensor assembly, guarantees normal steady operation.Linear CCD sensor assembly and sensor driver module are coupled to signal processing module.The directional light that light-source system sends is radiated at testing medium surface and black region around, and light after reflection enters optical lens.Can regulate according to actual needs grating and the focal length of optical lens, make the light contrast that enters linear CCD sensor reach optimum, the real image that can obtain an amplification after optical lens is presented on linear CCD sensor.Utilize optical lens not only can improve contrast according to Environmental adjustments exposure intensity, make linear CCD sensor collect a clear enlarged image.Linear CCD sensor, under the effect of sensor driver module, converts corresponding analog voltage signal output by amplifying real image to by light signal.

Claims

1. a soft medium edge pick-up unit, comprise light tight black box, image capturing system and light-source system, it is characterized in that: described light tight black box top is to become the inclined-plane at α angle with surface level having a circular hole at the center section near bottom, inclined-plane; For the optical lens of image capturing system is installed, the inner wall of black box is black frosted layer, reduces the impact of reflection ray on measuring accuracy; Before and after black box, base, two sides middle body respectively has a rectangle gap, so that testing medium is through pick-up unit; Each fixes a wear-resisting set collar of strip centre position, black box base front and back, in the middle of fixed frame, there is circular hole, testing medium from then on hole pierces into black box rectangle gap, and guarantee that testing medium is at the uniform velocity when the pick-up unit, keep stable tensile force, described light-source system is positioned at beveled top end central authorities below.