MOVING-MEMBER DETECTING DEVICE AND IMAGE FORMING APPARATUS
First Claim
1. A moving-member detecting device comprising:
- an image acquiring unit includinga light source configured to emit a light beam to a detecting position of a moving member, an area sensor configured to acquire image data of a one- or two-dimensional image, and an area-sensor control unit configured to acquire the image data acquired by the area sensor in response to a trigger signal; and
a speed calculating unit, whereinthe image acquiring unit is configured to acquire pieces of image data of the moving member at a first position and a second position, respectively, in a moving direction of the moving member so that the image acquiring unit acquires the piece of position image data for the second position when the moving member is at the second position after acquiring the piece of image data for the first position, andthe speed calculating unit is configured to calculate a moving speed of the moving member from the piece of image data for the first position and the piece of image data for the second position.
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Accused Products
Abstract
A moving-member detecting device includes an image acquiring unit and a speed calculating unit. The image acquiring unit includes a light source configured to emit a light beam to a detecting position of a moving member; an area sensor configured to acquire image data of a one- or two-dimensional image; and an area-sensor control unit configured to acquire the image data. The image acquiring unit is configured to acquire pieces of image data of the moving member at first and second positions, respectively, in a moving direction of the moving member so as to acquire the piece of position image data for the second position when the moving member is at the second position after acquiring the piece of image data for the first position. The speed calculating unit is configured to calculate a moving speed of the moving member from the pieces of image data.
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Citations
9 Claims
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1. A moving-member detecting device comprising:
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an image acquiring unit including a light source configured to emit a light beam to a detecting position of a moving member, an area sensor configured to acquire image data of a one- or two-dimensional image, and an area-sensor control unit configured to acquire the image data acquired by the area sensor in response to a trigger signal; and a speed calculating unit, wherein the image acquiring unit is configured to acquire pieces of image data of the moving member at a first position and a second position, respectively, in a moving direction of the moving member so that the image acquiring unit acquires the piece of position image data for the second position when the moving member is at the second position after acquiring the piece of image data for the first position, and the speed calculating unit is configured to calculate a moving speed of the moving member from the piece of image data for the first position and the piece of image data for the second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification