JP2012243387A - Illumination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination system in which the work of comparing a contrast between the illumination of a surface to be illuminated and a reference value can be facilitated.SOLUTION: An inspection apparatus comprises an inspection stage 2a equipped with a top plate 2b on which a printed matter to be inspected is mounted, a lighting fixture 1 located above the top plate 2b and illuminating the top plate 2b, an illuminance sensor 3 embedded in the center position of the top plate 2b, and a control unit 6 which outputs the comparison results of the detection value from the illuminance sensor 3 and a reference value to a display 5a. Lighting control of the lighting fixture 1 is performed so that the illuminance satisfies the reference value on the basis of the comparison results.

Description

  The present invention relates to a lighting system.

  Conventionally, there has been a printed matter inspection apparatus that includes an illuminating device that illuminates an imaging region of a printed matter and an imaging camera that images the imaging region and inspects the printed matter based on imaging data (see Patent Document 1). In this printed matter inspection device, the illuminance of the imaging region is obtained based on the imaging data obtained from the imaging camera, and the light output of the illumination device is automatically adjusted so that the illuminance of the imaging region becomes the target illuminance. It was.

Japanese Patent Laid-Open No. 11-42837

  However, in the above method, even if the light output from the illuminating device is the same, the illuminance obtained from the imaging data of the imaging camera differs if the reflectance of the printed surface is different. There was a possibility that the standard was not met. Therefore, in order to adjust the illuminance of the inspection table on which the printed material is placed in the printed material inspection apparatus to the reference value, the illuminance at a predetermined location on the inspection table is measured with an individual illuminometer, and the illuminance satisfies the reference value. If not, it was necessary to adjust the light output of the lighting device. Therefore, in order to provide a visual environment in which the standard illuminance is ensured when inspecting the printed matter, after measuring the illuminance accurately using a ruler or a jig every time the illuminance is measured, There is a problem that it is necessary to adjust the light output of the illuminating device by obtaining the illuminance with an illuminometer arranged at the measurement position, and it takes time to measure the illuminance and adjust the output of the illuminating device.

  This invention is made | formed in view of the said reason, The place made into the objective is providing the illumination system which can perform the operation | work which compares the illumination intensity of an illumination object surface with a reference value easily.

  In order to solve the above problems, an illumination system according to the present invention includes an illuminance sensor embedded in an illumination target surface of a luminaire, and a comparison unit that outputs a comparison result comparing a detection value of the illuminance sensor and a reference value. It is characterized by having.

  In this illumination system, it is preferable to include a display unit that displays the comparison result.

  In this lighting system, it is preferable that the lighting system includes a control unit that dims the lighting fixture so that a detection value of the illuminance sensor satisfies the reference value based on the comparison result.

  In this illumination system, it is preferable to include a cover that covers the illuminance sensor so as to be freely opened and closed.

  In the present invention, there is an effect that it is possible to easily perform the operation of comparing the brightness of the illumination target surface with the reference value when using the illumination system.

It is a side view of the inspection apparatus of this embodiment. (A) And (b) is the top view which expanded the illumination sensor part same as the above partially. It is the perspective view which looked at the inspection apparatus same as the above from the front side. It is side surface sectional drawing of a lighting fixture part same as the above. It is a block diagram same as the above. It is a flowchart of adjustment work same as the above.

  Hereinafter, an embodiment in which the illumination system of the present embodiment is applied to a printed matter inspection apparatus will be described with reference to FIGS.

  As shown in FIGS. 1 to 5, the inspection apparatus includes an inspection table 2a on which a printed material (not shown) to be inspected is placed on a top plate 2b, a top plate 2b positioned above the top plate 2b, and the top plate 2b. The lighting fixture 1 which illuminates a printed matter, and the illuminance sensor 3 embedded in the center position of the top plate 2b are provided. The illuminance sensor 3 is made of a photodiode, for example, and detects illuminance at the center position of the top plate 2b. Here, the center position refers to a position substantially in the center of the area on the top plate 2b where the printed matter to be inspected is placed.

Further, as shown in the block diagram of FIG. 5, the inspection apparatus further includes a control unit 6, a display unit 5 a, and an operation unit 11.
The control unit 6 outputs a comparison result obtained by comparing the reference value and the detection value of the illuminance sensor 3 to the display unit 5a, and illumination is performed so that the illuminance satisfies the reference value defined by the international standard (ISO 3664) based on the comparison result. Dimming the instrument 1 Here, the control unit 6 constitutes a comparison unit that outputs a comparison result obtained by comparing the reference value and the detection value of the illuminance sensor 3 to the display unit 5a.

  The display unit 5a is composed of, for example, a liquid crystal display with a touch panel function, and is supported by a support unit 5b installed on the top board 2b at a position where it can be easily viewed and operated by an operator standing in front of the inspection table 2a. .

  A cover 4 covering the illuminance sensor 3 is attached to the top plate 2b so as to be slidable by providing a known rail structure, for example. 1 and 3, the illustration of the cover 4 is omitted. The cover 4 can be switched between a state in which the illuminance sensor 3 in FIG. 2A is covered and a state in which the illuminance sensor 3 in FIG. 2B is exposed. When the cover 4 is closed, no step is generated between the top plate 2 b and the cover 4. Note that the cover 4 may be detachably provided on the top plate 2b, or the illuminance sensor 3 may be exposed by removing the cover 4 when adjusting the illuminance.

  The operation unit 11 includes, for example, a touch panel provided on the display unit 5 or an operation switch (not shown) provided on the top plate 2b, and the operation mode of the control unit 6 is set to an inspection mode for inspecting a printed matter. Alternatively, it is operated when switching to an adjustment mode for adjusting illuminance.

  In the printed matter inspection apparatus, the visual environment of the top board 2b is usually confirmed before starting the printed matter inspection. When confirming the visual environment, the operator opens the cover 4 and operates the operation unit 11. Operate to switch to adjustment mode. On the other hand, when the adjustment mode ends, the operator operates the operation unit 11 to switch to the inspection mode, closes the cover 4, and then starts the inspection of the printed matter.

  FIG. 4 is a cross-sectional view of the lighting fixture 1. As shown in FIG. 4, the luminaire 1 includes four straight-tube fluorescent lamps 7 mounted in parallel, a lighting circuit 8 for the lamps 7, and light from each lamp 7 in the upward and left-right directions in FIG. Is reflected downward (to the top plate 2b side). The lighting circuit 8 dims the lamp 7 in accordance with a control signal from the control unit 6.

  Here, the operation of this inspection apparatus will be described with reference to the flowchart of FIG. When the inspection apparatus is turned on, the lighting circuit 8 lights the lamp 7 (step S101). The control unit 6 determines the operation mode based on the operation input from the operation unit 11 (step S102). If it is in the inspection mode, the process proceeds to step S201, and the state of the inspection apparatus is displayed on the display unit 5a, so that the inspection can be performed.

  On the other hand, if the adjustment mode is determined in step S102, the illuminance is detected by the illuminance sensor 3 because the cover 4 has been opened by the operator (step S103). When the control unit 6 determines that the illuminance detected by the illuminance sensor 3 in step S103 satisfies the reference value defined by the international standard (ISO 3664) (step S104), the dimming of the lamp 7 by the control unit 6 ends. Then, the state of the inspection apparatus is displayed on the display unit 5a (step S201). When the operator confirms the completion of the adjustment by viewing the display on the display unit 5a, the operator closes the cover 4 and is ready for inspection. On the other hand, when the control unit 6 determines in step S104 that the detected illuminance of the illuminance sensor 3 does not satisfy the reference value defined by the international standard (ISO 3664), the comparison result is displayed on the display unit 5a (step S105). After the control unit 6 dimmes the lamp 7 so that the detected illuminance of the illuminance sensor 3 satisfies the reference value defined by the international standard (ISO3664) (step S106), the process proceeds to step S103.

  As described above, in the illumination system applied to the present embodiment, the illuminance sensor 3 embedded in the illumination target surface of the luminaire 1 and the comparison result comparing the detection value of the illuminance sensor 3 and the reference value are output. And a comparison unit (control unit 6).

  This saves the operator from having to measure the illuminance at a predetermined precise position every time to adjust the illuminance, and outputs the result of comparing the detected value of the illuminance with the reference value. You can check whether the value is satisfied.

  The lighting system applied to the present embodiment includes a display unit 5a that displays the comparison result.

  Thus, the operator can visually confirm the comparison result based on the display on the display unit 5a.

  In addition, the lighting system applied to the present embodiment includes the control unit 6 that adjusts the lighting fixture 1 so that the detection value of the illuminance sensor 3 satisfies the reference value based on the comparison result.

  Thereby, the operation | work which an operator dimmes the lighting fixture 1 can be simplified so that illumination intensity may satisfy | fill a reference value.

  Moreover, the illumination system applied to this embodiment includes a cover 4 that covers the illuminance sensor 3 so as to be freely opened and closed.

  As a result, the illuminance sensor 3 is less likely to be scratched or soiled, and maintenance work such as maintenance or replacement of the illuminance sensor 3 can be reduced.

  In the present embodiment, the illuminance at the center of the top 2b detected by the illuminance sensor 3 is compared with a reference value defined by an international standard (ISO 3664). Illuminance is detected in a predetermined irradiation range (for example, 1 m × 1 m) centered on the central position, and it is determined whether or not the illuminance uniformity of the irradiation range is 75% or more, which is a reference value defined by ISO 3664. You may do it. In this case, it is possible to compare whether or not both the illuminance and the illuminance uniformity satisfy the reference value, and output the result to the display unit 5a. Under the viewing environment defined by ISO 3664, Inspection is performed.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2a Inspection table 2b Top plate 3 Illuminance sensor 4 Cover 5a Display part 5b Support part 6 Control part (comparison part)
7 Lamp 8 Lighting circuit 9 Reflector 11 Operation section

Claims (4)

  An illumination system comprising: an illuminance sensor embedded in an illumination target surface of a luminaire; and a comparison unit that outputs a comparison result comparing a detection value of the illuminance sensor and a reference value.   The illumination system according to claim 1, further comprising a display unit that displays the comparison result.   3. The illumination system according to claim 1, further comprising a control unit that adjusts the lighting fixture so that a detection value of the illuminance sensor satisfies the reference value based on the comparison result. 4.   The illumination system according to any one of claims 1 to 3, further comprising a cover that covers the illuminance sensor so as to be freely opened and closed.

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