JP3169520U - Dimmable linear lighting device - Google Patents

Abstract

The present invention provides a dimmable light source that adjusts the brightness of light in a specific direction, makes the inspection target of an inspection object stand out more clearly, and makes it easy to determine whether the inspection object is dirty or wrinkled. To provide a linear lighting device. An arcuate arch shape is used for irradiating light to an object to be inspected so that an image of the object to be inspected can be captured by an image sensor. A plurality of linear light sources 31 that are present and arranged above the inspection object 1 and project light rays onto the inspection object 1, and a dimming controller 32 that adjusts the luminance of each linear light source 31 are provided. [Selection] Figure 1

Description

  The present invention is installed in the inspection equipment, and by adjusting the brightness according to the material, shape, surface irregularity, reflection degree, etc. of the object to be inspected, The present invention relates to a dimmable linear illumination device that can make problems such as wrinkles and dirt on an object stand out.

  2. Description of the Related Art Conventionally, most illumination devices applied to inspection equipment irradiate light directly on an object to be inspected to highlight an inspection target on the object to be inspected. However, for printed products, for example, inspection of irregularities on the surface of printed products, inspection of hot stamp labels, inspection of stamped labels, etc. The goal cannot be highlighted.

  When responding to different inspection goals or needs for printed products, a lighting device that emits a single direction of light cannot meet a variety of inspection lighting needs, and therefore has different orientations in time for different needs. It is necessary to replace the lighting device with a lighting function. However, such a method of exchanging the lighting device is very laborious and time consuming.

  The problem to be solved by the present invention is applied to inspection equipment, and the brightness can be adjusted according to the material, shape, surface irregularity, and reflection level of the object to be inspected, and the light intensity in a specific direction can be adjusted. An object of the present invention is to provide a dimmable linear illumination device that makes an inspection target of an inspection object stand out more clearly and makes it easy to determine whether the inspection object is dirty or flawed. .

  The present invention relates to a dimmable linear illumination device that is installed in an inspection facility and irradiates light on the inspection object so that an image of the inspection object can be captured by an image sensor. A plurality of linear light sources that are arranged above the object to be inspected and project light rays to the object to be inspected, and a dimming controller that adjusts the luminance of each linear light source. And

The linear light source can be either a fluorescent lamp or an LED strip light.
The dimming controller may include a plurality of current control devices that adjust the luminance of each linear light source corresponding to each of the linear light sources.
A light diffusing member may be provided that is interposed between the inspection object and the linear light source and irradiates the inspection object after uniformly diffusing light rays projected from the linear light source.

It is preferable to have a light supplement device that generates light coaxial with the inspection direction of the image sensor and increases light emitted from the direction of the image sensor.
The auxiliary light device is installed in a linear light source and a path through which the image sensor captures an image, reflects a light beam generated by the linear light source of the auxiliary light device, and then irradiates the inspection object, and A beam splitter that forms irradiation light in the same direction as the inspection direction of the image sensor.
The linear light source of the light supplement device can be either a fluorescent lamp or an LED strip light.

  According to the present invention, the brightness of a specific linear light source is adjusted by a dimming controller according to the material, shape, surface irregularity, reflection degree, etc. of the object to be inspected, and the brightness of the light in a specific direction is adjusted. Can be adjusted to highlight the inspection target of the object to be inspected, and to make problems such as wrinkles and dirt on the object to be inspected to meet the inspection needs.

It is a perspective view of the inspection equipment concerning Example 1 of the present invention. It is a side view of the inspection equipment concerning Example 1 of the present invention. 1 is a block diagram of a dimmable linear illumination device showing a first embodiment of the present invention. It is a side view of the inspection equipment which concerns on Example 2 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 3 show Embodiment 1 of the present invention.
1 and 2 are a perspective view and a side view, respectively, of an inspection facility having a dimmable linear illumination device according to the present invention.
As shown in FIGS. 1 and 2, the inspection facility is provided with an inspection table 2 for placing the inspection object 1, an inspection area 21 is set on the inspection table 2, and an inspection area is located above the inspection area 21. An image sensor 22 for capturing 21 images is installed.

The dimmable linear illumination device 3 of the present invention is installed above the inspection area 21 of the inspection table 2 and is used to provide illumination necessary when the image sensor 22 captures an image of the inspection object 1. It is done.
The dimmable linear illuminating device 3 has an arcuate arch shape and is arranged above the inspection area 21 and is used to project a light beam onto the inspection object 1 on the inspection area 21. 31 and a dimming controller 32 that can adjust the luminance of each linear light source 31 by wired or wireless transmission.

Since the linear light source 31 has an arcuate arch shape centered on the inspection area 21 and is distributed and installed above the inspection area 21, the linear light source 31 irradiates the inspection area 21 with light with no blind spots. Can do.
In addition, the installation quantity of the linear light source 31 is not limited, The arrangement quantity and the kind of light sources, such as a LED strip light comprised from a fluorescent lamp or a some LED lamp, can be determined as needed.

The dimming controller 32 can adjust the light intensity for each of the individual linear light sources 31.
As shown in FIG. 3, the dimming controller 32 has a plurality of current control devices 321 each electrically connected to different linear light sources 31, and thereby connected to a specific linear light source 31. The current control device 321 adjusts the magnitude of the current output and controls the intensity of light emitted from the linear light source 31 to obtain a change in brightness.

The dimmable linear illumination device 3 of the present invention may include a light supplement device 5 (see FIGS. 1 and 2).
The auxiliary light device 5 can emit light that is coaxial with the inspection direction of the image sensor 22 (indicated by a broken line in the drawing), and can increase the light emitted from the direction of the image sensor 22.
Specifically, the light supplement device 5 includes a linear light source 51 and a beam splitter 52. The beam splitter 52 is installed in a path through which the image sensor 22 captures an image. The beam splitter 52 is incident on the inspection object 1 after the light beam generated by the linear light source 51 is reflected, and is in the same direction as the inspection direction of the image sensor 22. Is used to increase the light coming from the direction of the image sensor 22.

The linear light source 51 may be a fluorescent lamp or an LED strip light composed of a plurality of LED lamps, but is not limited thereto.
As shown in FIG. 3, a current control device 322 electrically connected to the linear light source 51 is provided in the dimming controller 32, and the linear light source 51 also adjusts the magnitude of the current output by the current control device 322. The intensity of light emitted from the linear light source 51 can be controlled.

FIG. 4 shows a second embodiment of the present invention.
In the second embodiment, the light diffusing member 4 is interposed between the inspection object 1 and the linear light source 31, and the light projected from the linear light source 31 can be uniformly diffused and then projected onto the inspection object 1. .
The light diffusing member 4 is a cover body having an arcuate cross section and is made of a light diffusing medium.
Since the light diffusion member 4 is installed between the inspection object 1 and the linear light source 31, the light beam projected from the linear light source 31 toward the light diffusion member 4 is diffused when passing through the light diffusion member 4, It is possible to uniformly and soften the light beam applied to the inspection object 1.

All the linear light sources (including the linear light source 51 in the light supplement device 5) of the dimmable linear illumination device of the present invention can individually adjust the light intensity, and are used to generate light in an arbitrary angle direction. be able to. The purpose is to adjust the brightness of a specific linear light source according to the material, shape, surface irregularity, and reflection level of the object itself when applied to inspection equipment. It is intended to make it possible to meet various needs for inspection judgment by making the inspection target stand out, and problems such as wrinkles and dirt on the object to be inspected.
For example, if there is a projecting part on the object to be inspected, a shadow is formed on the background part of the part projecting with a directional light source, and the position or height of the projecting part is determined using this shadow. It can be carried out. As can be seen, the dimmable linear illumination device of the present invention can be differentiated by using different materials, shapes, irregularities, inspected objects having different reflection levels, and the like.

  The above description is based on the best embodiment of the present invention, and does not limit the scope of the present invention. All changes and modifications that do not depart from the claims of the utility model registration of the present invention Included in the scope of rights.

DESCRIPTION OF SYMBOLS 1 Inspection object 2 Inspection stand 21 Inspection area 22 Image sensor 3 Dimmable linear illuminating device 31 Linear light source 32 Dimming controller 321 Current control device 322 Current control device 4 Light diffusing member 5 Auxiliary device 51 Linear light source 52 Beam Splitter

Claims (7)

A dimmable linear illumination device that is installed in an inspection facility and irradiates light on the inspection object so that an image of the inspection object can be captured by an image sensor, and the linear illumination device includes:
A plurality of linear light sources which are arranged above the object to be inspected in an arcuate arch shape and project light rays onto the object to be inspected;
A dimming controller for adjusting the brightness of each linear light source;
A dimmable linear lighting device comprising:   The dimmable linear illumination device according to claim 1, wherein the linear light source is either a fluorescent lamp or an LED strip light.   The dimmable linear illumination according to claim 1, wherein the dimming controller includes a plurality of current control devices that adjust the luminance of each linear light source corresponding to each of the linear light sources. apparatus.   2. A light diffusing member that is interposed between the inspection object and the linear light source and irradiates the inspection object after uniformly diffusing a light beam projected from the linear light source. A linear illuminator capable of dimming as described in 1.   The dimmable linear illumination according to claim 1, further comprising a light supplement device that generates light coaxial with an inspection direction of the image sensor and increases light emitted from the direction of the image sensor. apparatus. The light supplement device is
A linear light source;
The image sensor is installed in a path for capturing an image, reflects a light beam generated by a linear light source of the light supplement device, irradiates the inspection object, and irradiates in the same direction as the inspection direction of the image sensor. A beam splitter that forms light;
The dimmable linear illumination device according to claim 5, comprising:   The dimmable linear illumination device according to claim 6, wherein the linear light source of the light supplement device is either a fluorescent lamp or an LED strip light.

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