7.3. Intelligent media sensor

• With the intelligent media sensor (IM-102) being installed, it is possible to detect the paper kind of the feeding paper.
• The intelligent media sensor is equipped with the sensor for detecting the envelope and the sensor for detecting the basis weight.

Configuration

Basis weight detection mechanism

• There is a source of light on the paper basis weight detection board/TX, and white light is irradiated to the paper.
• The white light is penetrated the paper by part, and reaches the photodiode installed on the paper basis weight detection board/RX.
• There is a source of RGB light on the paper basis weight detection board/RX, and RGB light is irradiated to the paper.
• The RGB light reflects the paper, and reaches the photodiode installed on the paper basis weight detection board/RX.
• The basic weight of the feeding paper is decided according to the value of white light and RGB light that the photodiode detected.

Envelope detection mechanism

• Papers come into contact with ultrasonic waves that are transmitted from the envelope detection board/TX. The ultrasonic waves are received on the envelope detection board/RX.
• The ultrasonic waves attenuate due to the air layer between papers when the paper kind is envelope.
• The voltage at the receiver is checked. A determination of envelope is made if the voltage is the same as or less than a predetermined value.