Closed circuit control device for scanner
First Claim
Patent Images
1. A closed circuit control device for controlling the scanning speed of a plurality of carriers inside a scanner, comprising:
- a plurality of optical meters attached to a transparent glass panel and an optical sensor inside the scanner, wherein at least two of the optical meters are overlapped to produce digital signals with a cyclical directional pattern, whereby the optical scanner is capable of continuously picking up images of the optical meters during a scanning session and generating corresponding sense signals for controlling speed of a plurality of carriers, and detecting a moving direction according to the cyclical directional pattern.
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Abstract
A closed circuit control device for controlling carrier speed of a scanner. An optical meter is attached to the transparent glass panel of a scanner such that an image of the optical meter is formed on an optical sensor such as a charge couple device or a contact image sensor. Image of the optical meter is converted into sense signals by the optical sensor so that speed of the carrier can be accurately computed. Through the acquisition of an accurate carrier speed, scanning speed and direction can be precisely controlled.
22 Citations
23 Claims
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1. A closed circuit control device for controlling the scanning speed of a plurality of carriers inside a scanner, comprising:
a plurality of optical meters attached to a transparent glass panel and an optical sensor inside the scanner, wherein at least two of the optical meters are overlapped to produce digital signals with a cyclical directional pattern, whereby the optical scanner is capable of continuously picking up images of the optical meters during a scanning session and generating corresponding sense signals for controlling speed of a plurality of carriers, and detecting a moving direction according to the cyclical directional pattern. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A closed circuit control method for controlling the carrier of a scanner, comprising:
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forming an image of an optical meter attached to the carrier in an optical sensor and converting the image into sense signals;
transmitting the sense signals to a computational device for converting frequency of a sense signal to a carrier speed;
comparing a computed carrier speed with a preset speed;
reducing speed of a driving motor if the computed carrier speed is greater than the preset speed;
increasing speed of the driving motor if the computed carrier speed is smaller than the preset speed; and
maintaining speed of the driving motor if the computed carrier speed and the preset speed are identical. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An apparatus comprising:
an optical meter attached to a scanning device, wherein said optical meter comprises at least two partially offset sets of alternating black and white strips, wherein said sets are capable of producing a cyclical directional pattern in response to a moving light source, and wherein said scanning device is capable of detecting a moving direction and speed of said moving light source based on said cyclical directional pattern, the scanning device to control a movement of the moving light source based, at least in part, on the cyclical directional pattern. - View Dependent Claims (14, 15)
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16. A system comprising:
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an optical sensor to detect an image of an optical meter, wherein said optical meter comprises at least two partially offset bands of alternating black and white strips;
means for converting said image of an optical meter to a frequency of a sense signal;
means for determining a carrier speed based on said frequency of a sense signal; and
means for controlling movement of at least one carrier utilized in scanning operations based, at least in part, on the determined carrier speed. - View Dependent Claims (17, 18, 19)
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20. A method comprising:
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detecting, with a scanning device, an image of an optical meter, wherein said optical meter comprises at least two partially offset bands of alternating black and white strips;
converting said image of an optical meter to a frequency of a sense signal with the scanning device;
determining, with the scanning device, a carrier speed based on said frequency of a sense signal; and
controlling movement of the scanning device during scanning operations based, at least in part, on the determined carrier speed. - View Dependent Claims (21, 22, 23)
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Specification