Toyota Jidosha Kabushiki Kaisha

Nippon Soken, Inc.

Ryuzou Hori

Tsuneyuki Egami

Kazunori Yoshida

Takashi Kamo

Tsutomu Saito

Mitosi Ando

A coating quality measuring device and a pattern plate including one reference pattern portion having a large pattern width and a plurality of strip pattern portions each having a smaller pattern width. The pattern plate is disposed opposite the coated surface. The pattern plate is reflected off the coated surface and a reflected image is formed on an image sensor. The image sensor successively outputs signals each corresponding to the light level of each strip pattern portion on a line extending in a width direction of each strip pattern portion of the reflected image. A computing device calculates an average signal level of the signals outputted by the image sensor, divides the difference between the average signal level and the signal level of each signal by the signal level of the reference pattern portion and calculates a square average value of the obtained division value to obtain a measure of the coating quality of the coated surface.

Coating quality measuring device and method

A coating quality measuring device has a pattern plate including one reference pattern portion having a larger pattern width and a plurality of strip pattern portions having different pattern widths which are smaller than that of the reference pattern portion and are decreased in order. The pattern plate is disposed opposite the coated surface. The pattern plate is reflected on the coated surface and a reflected image is formed on an image sensor. The image sensor successively outputs signals each corresponding to the lightness of each pattern portion on a line extending in a width direction of each pattern portion of the reflected image. A computing device calculates a difference between the peak value of the signal level of the output signal corresponding to each strip pattern portion in the reflected image and the signal level of the output signal corresponding to the ground portion, divides the calculated difference by the signal level of the output signal corresponding to the reference pattern portion and detects the pattern width of the strip pattern portion wherein the division value becomes not larger than a predetermined value, thereby to obtain the coating quality of the coated surface.

Coating quality measuring device

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Toyota, Japan

Ryuzou Hori