JP7360316B2 - Light irradiation system and control device - Google Patents

Description

The present invention relates to a light irradiation system including a split-emission type light irradiation device, and a control device that controls dimming of the light irradiation device.

In recent years, so-called split light emitting type light irradiation devices, which have a ring-shaped light emitting surface divided into a plurality of light emitting areas that can be individually dimmed, have been used when inspecting the surface of products (workpieces), for example in factories. It may happen. This split light emitting type light irradiation device is configured so that multiple light emitting areas emit light according to a predetermined dimming pattern determined over multiple steps, and for example, light is irradiated sequentially from different directions to a workpiece. At the same time, by processing the captured image, surface defects can be extracted with good contrast.

By the way, when using such a split light emitting type light irradiation device, it is necessary to set the dimming value etc. of each light emitting area at each step so that the user can check the change in the dimming pattern of each light emitting area at each step. Parameters may be displayed on the display screen. For example, Patent Document 1 discloses a device that displays setting parameters such as dimming values for each light emitting area set for each step in a table format for all steps using characters such as numbers. By looking at the screen, the user can check the setting of the dimming pattern for each step of each light emitting region and adjust this setting.

Japanese Patent Application Publication No. 2018-181589

However, with the above-mentioned display that displays setting parameters such as dimming values for each light emitting area over all steps in a table format using characters such as numbers, it is difficult to understand changes in the dimming pattern at each step, and therefore each light emission There is a problem in that it is difficult to adjust the setting of the dimming pattern of the area. As the number of divisions of the light emitting region and the number of steps increase, the display on the screen becomes extremely complicated, and it becomes increasingly difficult to adjust the settings of the dimming pattern.

The present invention has been made in view of these problems, and provides a light irradiation system that has a light emitting surface divided into a plurality of light emitting regions that can be individually dimmed, in which the dimming pattern of each light emitting region is adjusted step by step. The main goal is to make settings easier to adjust.

That is, the light irradiation system according to the present invention includes a light emitting surface formed from a plurality of light sources held in a casing, and the light emitting surface is divided into a plurality of light emitting areas that can be individually dimmed. a light irradiation device configured to emit light in accordance with a predetermined dimming pattern determined over a plurality of steps; and a display unit that displays the dimming pattern for each step of the plurality of light emitting regions on a screen. The display unit displays a virtual light emitting surface imitating the light emitting surface on the screen, and displays the virtual light emitting surface reflecting the dimming pattern of each light emitting area in each step at each step. It is characterized in that it is displayed with a transition to .

With such a configuration, a virtual light emitting surface that reflects the dimming pattern of each light emitting area in each step is displayed on the screen, so it is possible to easily imagine the light emitting mode of each light emitting area for each step. Since the screen of such a virtual light emitting surface is divided and transitioned step by step and displayed like a moving image, the user can easily grasp the change in the dimming pattern set for each light emitting area at each step. This makes it easy to adjust the setting of the dimming pattern for each step of each light emitting region.

In the light irradiation system, it is preferable that the display section displays the dimming value of the light emitting area at each step together with the virtual light emitting surface.
If this is the case, the dimming value of the light-emitting area at each step will be displayed together with the virtual light-emitting surface, allowing the user to visualize the light-emitting mode of each light-emitting area at each step while also making detailed dimming settings. This makes it easier to adjust the dimming pattern settings for each light emitting area.

The light irradiation system is configured to be able to change the dimming value of the light emitting area when a predetermined input operation is received from a user while the dimming value of the light emitting area is displayed together with the virtual light emitting surface. Preferably.
In this way, the user can change the dimming value of each light emitting area while looking at the virtual light emitting surface, making it easier to adjust the setting of the dimming pattern of each light emitting area.

In the light irradiation system, the display unit displays, together with the virtual light emitting surface, a symbol indicating whether the displayed virtual light emitting surface is viewed from a front side or a back side of the light emitting surface. is preferred.
In this way, the user can understand whether the displayed virtual light emitting surface is viewed from the front side or the back side, making it easier to understand how the light hits the object.
Such a configuration is particularly useful when the light irradiation system of the present invention is used, for example, for surface inspection of a workpiece such as a product in a factory or the like. In other words, in such surface inspection, the position of the imaging device that images the workpiece is changed depending on the material of the workpiece. For example, when capturing reflected light from the workpiece surface, the imaging device captures the workpiece from the back side of the light emitting surface. When capturing the light transmitted through the workpiece, the imaging device is arranged so as to look from the back side of the workpiece toward the front side of the light emitting surface. By displaying the above symbol, the user can understand whether the virtual light-emitting surface is viewed from the front side or the back side, making it easier for the user to imagine how the light hits the workpiece in the captured image. The setting of the dimming pattern of each light emitting area can be adjusted even more easily.

In the light irradiation system, when the setting of a viewpoint position with respect to the light emitting surface is switched between the front side and the back side by a user's input operation, the display unit displays the virtual light emitting surface inverted. is preferred.
In this way, it is possible to more easily understand how the light hits the irradiated object.

Further, the control device of the present invention includes a light emitting surface formed from a plurality of light sources held in a casing, and the light emitting surface is divided into a plurality of light emitting areas that can be individually dimmed, and the light emitting surface is divided into a plurality of light emitting areas that can be individually dimmed. A light irradiation device configured to emit light in accordance with a predetermined dimming pattern in which a region is defined over a plurality of steps is dimmed, and the dimming pattern for each step of the plurality of light emitting regions is displayed on a screen. a display unit that displays a virtual light-emitting surface that imitates the light-emitting surface on the screen, and displays the virtual light-emitting surface that reflects the dimming pattern of each light-emitting area in each step; , is characterized in that it is displayed in transition for each step.
Such a control device can provide the same effects as the light irradiation system of the present invention.

According to the present invention configured in this way, in a light irradiation system having a light emitting surface divided into a plurality of light emitting regions that can be individually dimmed, it is easy to adjust the settings of the dimming pattern for each step of each light emitting region. can.

FIG. 1 is a schematic diagram showing the overall configuration of a light irradiation system according to the present embodiment. FIG. 2 is a perspective view schematically showing the configuration of the light irradiation device of the same embodiment. The functional block diagram of the light irradiation system of the same embodiment. FIG. 7 is a schematic diagram showing a dimming pattern display screen in the same embodiment, and showing a virtual light emitting surface when the light emitting surface is viewed from the back side. FIG. 3 is a schematic diagram showing transitions of a dimming pattern display screen in the same embodiment. FIG. 7 is a schematic diagram showing a dimming pattern display screen in the same embodiment, and showing a virtual light emitting surface when the light emitting surface is viewed from the front side. The schematic diagram which shows the dimming pattern display screen in other same embodiment. The schematic diagram which shows the dimming pattern display screen in other same embodiment. The schematic diagram which shows the dimming pattern display screen in other same embodiment.

An embodiment of a light irradiation system 100 according to the present invention will be described below with reference to the drawings.

The light irradiation system 100 of this embodiment is used for surface inspection of a workpiece W such as a product in a factory or the like. Specifically, as shown in FIG. 1, this light irradiation system 100 includes a light irradiation device 1 that is provided between a work W and an imaging device C and irradiates inspection light onto the work W; and a control device 2 that controls the light emission mode. This light irradiation device 1 is of a so-called divided light emitting type in which its light emitting surface 12 is divided into a plurality of light emitting regions 121 that can be individually dimmed. Each light emitting region 121 is configured to emit light in a predetermined dimming pattern over the steps. The dimming pattern of each light emitting area 121 is displayed on the screen 3 of the display D connected to the control device 2 so that the user can confirm it. Each part will be explained below.

As shown in FIGS. 1 and 2, the light irradiation device 1 includes a casing 11 that is ring-shaped and has an inner circumferential surface 111 that is inclined toward the central axis 11a, and an inner surface of the casing 11. It is provided with a ring-shaped light emitting surface 12 formed on a peripheral surface 111. A plurality of light sources 13 (specifically, light emitting diodes) are held so as to be uniformly arranged on the inner peripheral surface 111 of the casing 11, and a light emitting surface 12 is formed by the plurality of light sources 13. Note that this light emitting surface 12 may be constituted by a light diffusing plate or the like provided in the light emission direction of the plurality of light sources 13, or may be constituted by the plurality of light sources 13 themselves held in the casing 11 so as to be exposed. good.

The light emitting surface 12 of this embodiment is divided into 14 light emitting areas 121 that can be individually dimmed. The plurality of light emitting regions 121 have the same shape and are formed at regular intervals around the central axis 11a of the inner circumferential surface 111 of the casing 11. That is, the plurality of light emitting regions 121 are formed so as to be axially symmetrical with respect to the central axis 11a of the inner circumferential surface 111 of the casing 11 as an axis of symmetry. Each light emitting area 121 is formed by a plurality of light sources 13, and based on a control signal transmitted from the control device 2, the plurality of light sources 13 are dimmed and controlled for each unit forming each light emitting area 121. It is configured.

The control device 2 is for controlling the light emission of the plurality of light emitting regions 121 included in the light irradiation device 1. Specifically, the control device 2 is a so-called computer equipped with a CPU, memory, etc., and as shown in FIG. At least the functions of the section 21 and the display section 22 are exhibited. Each functional unit will be explained below.

The light control unit 21 stores a light control pattern of a plurality of light emitting regions 121 provided in the light irradiation device 1, and controls each light source 13 provided in the light irradiation device 1 to cause each light emitting region 121 to emit light according to this light control pattern. By supplying power to each light emitting region 121, each light emitting region 121 is individually controlled to dim.

The dimming pattern means a combination of parameters related to dimming, such as dimming values, set for each light emitting area 121 for each step, and the dimming control unit 21 The dimming pattern of each light emitting area 121 over the area is stored.

The dimming control unit 21 also functions as a setting changing unit that changes the dimming pattern set in the light emitting area 121 of each step. The setting change unit is configured to accept an input operation from a user using an input means I such as a mouse, a keyboard, a touch panel, etc., and change a dimming pattern such as a dimming value in each step.

The display unit 22 refers to the dimming pattern spanning multiple steps of each light emitting area 121 stored in the dimming control unit 21 and displays this on the screen 3 of the display D.

In the light irradiation system 100 of the present embodiment, the display section 22 has a virtual light emitting surface imitating the light emitting surface 12 of the light emitting device 1 so that the user can easily understand changes in the dimming pattern of each light emitting region 121. 31 on the screen 3, reflects the dimming pattern of each light emitting area 121 at each step on this virtual light emitting surface 31, and displays this on the screen 3 as a dimming pattern transition display section 221 that transitions this for each step. It is configured to perform the functions of

As shown in FIG. 4, the virtual light emitting surface 31 has an annular shape that resembles the light emitting surface 12 when viewed in plan from the direction of the central axis 11a. The virtual light emitting surface 31 may be a realistic representation of the light emitting surface 12, or may be a symbolic representation in an illustration style. The virtual light emitting surface 31 is displayed divided into a plurality of virtual light emitting areas 32 that imitate the plurality of light emitting areas 121 of the light irradiation device 1. In the vicinity of each virtual light emitting area 32, an identification symbol (in this case, numbers 1 to 14) for identifying the light emitting area 121 indicated by the virtual light emitting area 32 is displayed. They are displayed in order (clockwise).

The dimming pattern transition display section 221 displays each virtual light emitting region 32 in a manner that reflects the dimming pattern at each step. Specifically, the dimming at each step is changed by changing the color, brightness, shade, etc. of each virtual light emitting area 32 according to the magnitude of the dimming value set for each light emitting area 121. Reflect the pattern.

As shown in FIG. 5, the dimming pattern transition display unit 221 displays on the screen 3 the virtual light emitting surface 31 that reflects the dimming pattern of each light emitting region 121 at each step, while transitioning in predetermined steps. Here, the dimming pattern transition display section 221 displays the virtual light emitting surface 31 in separate screens 3 for each step, and by sequentially switching the screens 3, the change in the dimming pattern of the light emitting area 121 for each step is displayed. Display as a video. The transition (switching) of the screen 3 may be accompanied by any switching effect such as a fade or wipe. Further, the dimming pattern transition display section 221 may simultaneously display a plurality of virtual light emitting surfaces 31 having adjacent step numbers on one screen while the screen 3 is transitioning. Further, the dimming pattern transition display section 221 may display transitions by scrolling the virtual light emitting surface 31 for each step in the vertical or horizontal direction.

The display unit 22 also functions as a dimming setting display unit 222 that displays the dimming setting of each light emitting area 121 in each step together with the virtual light emitting surface 31. As shown in FIG. 4, when the virtual light emitting area 32 on the screen 3 is selected by the user through an input operation such as a mouse operation, the dimming setting display section 222 displays the light emitting area corresponding to the selected virtual light emitting area 32. A dimming setting symbol 34 indicating the dimming setting of the area 121 is displayed. The dimming setting display section 222 pops up the dimming setting of the selected virtual light emitting area 32 so as to overlay it near the virtual light emitting area 32 or on the virtual light emitting area 32 . Here, the dimming setting display section 222 displays the dimming value in numbers as the dimming setting symbol 34.

Here, when the user performs an input operation such as a keyboard operation while the dimming value of the virtual light emitting area 32 selected by the user's input operation is displayed together with the virtual light emitting surface 31, the setting change unit The dimming value set in the light emitting area 121 corresponding to the virtual light emitting area 32 is changed.

The display section 22 also functions as a step number display section 223 that displays a step number symbol 33 indicating the step number of the virtual light emitting surface 31 displayed on the screen 3 together with the virtual light emitting surface 31. Specifically, this step number symbol 33 is a slider that indicates the step number of the displayed virtual light emitting surface 31 by the position of a bar 331 (handle) on a straight line. When the bar 331 is slid by a user's input operation such as a mouse operation, the dimming pattern transition display unit 221 displays the virtual light emitting surface 31 in a step-by-step transition manner. This allows the user to easily check whether the change in the dimming pattern of the light emitting surface 12 is as intended. The step number display section 223 also displays a symbol 332 indicating the step number of the final step together with the virtual light emitting surface 31.

The display unit 22 also displays a viewpoint position symbol 35 indicating whether the displayed virtual light emitting surface 31 is viewed from the front side or the back side of the light emitting surface 12 together with the virtual light emitting surface 31. It functions as a display section 224. As shown in FIG. 4, the viewpoint position symbol 35 is represented by a schematic diagram of the object to be irradiated and the light irradiation device 1 viewed from the side. In this embodiment, the viewpoint position symbol 35 indicates that the virtual light emitting surface 31 is the light emitting surface 12 viewed from the back side.

The display unit 22 is configured to display the virtual light emitting surface 31 inverted when the setting of the viewpoint position with respect to the light emitting surface 12 is switched between the front side and the back side by a user's input operation. FIG. 6 is a screen showing a virtual light emitting surface 31 whose viewpoint position with respect to the light emitting surface 12 is set to the front side. As shown in FIG. 6, when the viewpoint position is set to the front side, the virtual light emitting surface 31 is horizontally reversed compared to when the viewpoint position is set to the back side (that is, the screen shown in FIG. 5). The identification symbols for identifying each virtual light emitting area 32 are displayed in order in the opposite direction (here, counterclockwise).

Switching of the setting of the viewpoint position with respect to the light emitting surface 12 may be performed by a user's input operation. For example, the setting of the viewpoint position with respect to the light emitting surface 12 may be switched between the front side and the back side by the user clicking or dragging the viewpoint position symbol 35 by the user's mouse operation or the like.

According to the light irradiation system 100 of this embodiment configured in this way, since the virtual light emitting surface 31 that reflects the dimming pattern of each light emitting area 121 at each step is displayed on the screen 3, the step of each light emitting area 121 is displayed. This makes it easier to visualize the light emission mode for each type. The virtual light emitting surface 31 is then divided and transitioned on the screen 3 for each step and displayed like a moving image, so that the user can easily understand changes in the dimming pattern set for each light emitting area 121 at each step. . This makes it easy to adjust the setting of the dimming pattern for each step of each light emitting region 121.

<Other embodiments>
Note that the present invention is not limited to the above embodiments.

Although the light irradiation system 100 of the embodiment is used for inspecting the surface of a workpiece W in a factory or the like, the present invention is not limited thereto. The light irradiation system 100 according to another embodiment is used, for example, for estimating the three-dimensional shape of an object using a photometric stereo method, which uses shadow information obtained by irradiating an object with light from different directions. may be used.

Although the light irradiation device 1 of the embodiment is a ring illumination including the ring-shaped light emitting surface 12, the present invention is not limited to this. In other embodiments, any lighting may be used, such as flat lighting or dome lighting. The present invention can be applied to any type of lighting as long as the light emitting surface 12 is divided into a plurality of light emitting regions 121 that can be individually dimmed. Further, the light source 13 is not limited to being held so as to be housed within the casing 11, but may be held so as to be exposed from the casing 11, for example.

In the embodiment described above, the virtual light emitting surface 31 is displayed in a transitional manner step by step as the slider 33 is operated by the user's input operation, but the present invention is not limited to this. In other embodiments, when a virtual button or the like on the screen 3 is clicked by a user's input operation, the virtual light emitting surface 31 may be automatically displayed in a step-by-step manner. In this case, the dimming pattern transition display section 221 may switch the virtual light emitting surface 31 at regular time intervals, or may switch the virtual light emitting surface 31 at time intervals individually set for each step.

Although the dimming pattern transition display section 221 of the embodiment displays the virtual light emitting surface 31 in transition one step at a time, the present invention is not limited to this. The dimming pattern transition display unit 221 of another embodiment may display the virtual light emitting surface 31 in transition in multiple consecutive steps arbitrarily set by the user.

In addition, as shown in FIGS. 7 and 8, the viewpoint position display unit 224 of another embodiment has a viewpoint position (camera position) set to either a specular reflection position (i.e., back side) or a transmission position (i.e., front side). Characters 351 indicating whether the virtual light emitting surface 31 is displayed may be displayed together with the virtual light emitting surface 31. Furthermore, as shown in FIGS. 7 and 8, the viewpoint position display unit 224 displays settings 341 of the light emission interval, light emission time, light emission delay time, and screen transition mode (auto or sequential) of each light emitting region 121 in each step. It may be displayed on the screen 3 together with the surface 31. The settings may be changed by a user's input operation.

Although the dimming pattern transition display section 221 of the embodiment displays the virtual light emitting surface 31 representing the light emitting surface 12 of one light irradiation device 1, the present invention is not limited thereto. As shown in FIG. 9, the dimming pattern transition display section 221 of another embodiment displays a plurality of (here, two) virtual light emitting surfaces 31 representing the light emitting surfaces 12 of a plurality of light irradiation devices 1 on one screen. They may be displayed simultaneously.

In the embodiment, each light emitting region 121 is formed by a plurality of light sources 13, but the present invention is not limited to this. In other embodiments, each light emitting region 121 may be formed by one light source 13.

In the embodiment, the functions of the dimming control section 21 and the display section 22 are performed by a single control device 2, but the present invention is not limited to this. In other embodiments, these functions may be performed by different control devices 2. Further, the display D may be included in the control device 2.

In addition, it goes without saying that the present invention is not limited to the embodiments described above, and that various modifications can be made without departing from the spirit thereof.

100...Light irradiation system 1...Light irradiation device 11...Casing 12...Light emitting surface 121...Light emitting area 13...Light source 22...Display part 3...Screen 31...・Virtual light emitting surface 32...Virtual light emitting area

Claims (7)

The light emitting surface is formed from a plurality of light sources held in a casing, the light emitting surface is divided into a plurality of individually dimmable light emitting regions, and the plurality of light emitting regions are defined over a plurality of steps. a light irradiation device configured to emit light according to a predetermined dimming pattern having one light emission mode for each step ;
a display unit that displays on a screen the dimming pattern determined over a plurality of steps of the plurality of light emitting areas;
The display section is
Displaying one virtual light emitting surface imitating the light emitting surface on the screen,
Light irradiation in which the one virtual light emitting surface is displayed at the same position by reflecting one light emission mode related to the plurality of light emitting areas in each step based on the dimming pattern, and switching the screen in each step . system. The light irradiation system according to claim 1, wherein the display unit displays the dimming value of the light emitting area at each step together with the virtual light emitting surface. 3. The light emitting area is configured to be able to change the dimming value of the light emitting area when a predetermined input operation is received from the user while the dimming value of the light emitting area is displayed together with the virtual light emitting surface. light irradiation system. Claims 1 to 3, wherein the display unit displays, together with the virtual light emitting surface, a symbol indicating whether the displayed virtual light emitting surface is viewed from the front side or the back side. The light irradiation system according to any one of . 5. When the setting of the viewpoint position with respect to the light emitting surface is switched between the front side and the back side by a user's input operation, the display section displays the virtual light emitting surface in a horizontally reversed manner. Light irradiation system. A light emitting surface formed from a plurality of light sources housed in a casing is provided, the light emitting surface is divided into a plurality of individually dimmable light emitting regions, and the plurality of light emitting regions are defined over a plurality of steps. A light irradiation device configured to emit light according to a predetermined dimming pattern having one light emission mode for each step ,
comprising a display unit that displays the dimming pattern determined over a plurality of steps of the plurality of light emitting areas on a screen,
The display section is
Displaying one virtual light emitting surface imitating the light emitting surface on the screen,
A control device that displays the one virtual light-emitting surface at the same position by reflecting one light-emitting mode related to the plurality of light-emitting regions in each step based on the dimming pattern, and switching the screen in each step . . The light emitting surface is formed from a plurality of light sources held in a casing, the light emitting surface is divided into a plurality of individually dimmable light emitting regions, and the plurality of light emitting regions are defined over a plurality of steps. a light irradiation device configured to emit light according to a predetermined dimming pattern;
a display unit that displays the dimming pattern for each step of the plurality of light emitting regions on a screen;
The display section is
displaying a virtual light emitting surface imitating the light emitting surface on the screen, and displaying the virtual light emitting surface reflecting the dimming pattern of each light emitting area in each step by switching the screen for each step;
A symbol indicating whether the displayed virtual light-emitting surface is viewed from the front side or the back side is displayed together with the virtual light-emitting surface, and the viewpoint with respect to the light-emitting surface is changed by the user's input operation. A light irradiation system that displays the virtual light emitting surface in a horizontally reversed manner when the position setting is switched between the front side and the back side.