Pfu Limited

Masaaki Sakai

Kiichiro Shimosaka

Yoshiro Kawamoto

Yoshifumi Nomura

Yoshikazu Morita

Masakazu Sakai

Shumpei Koshima

Provided are a medium conveying apparatus, a control method, and a control program to enable determining whether multi-feed of the medium has occurred with higher accuracy. A medium conveying apparatus includes a conveying module to convey a medium, a detection module to detect transmission information of ultrasonic waves transmitted through the medium or thickness information of the medium at a plurality of positions in the medium conveyed by the conveying module, a determination module to determine whether multi-feed of the medium has occurred, by comparing a value based on the transmission information or the thickness information with a threshold, for each of the plurality of positions, and a control module to execute an abnormality process when it is determined that multi-feed of the medium has occurred. The determination module changes a determination sensitivity of whether multi-feed of the medium has occurred, according to a position in the medium at which the transmission information or the thickness information has been detected by the detection module.

Medium conveyance device, control method, and control program

A medium conveying apparatus includes a conveying roller to convey a medium, an overlap detection sensor, a processor to detect an overlap portion in which it is determined that an overlap has occurred on the medium based on a detection output by the overlap detection sensor for the medium conveyed by the conveying roller, calculate an overlap length where the overlap portion is continuous based on a detection result of the overlap portion, determine whether a multi-feed has occurred based on the overlap length, and execute an abnormal processing for the multi-feed based on a determination result of the multi-feed. The processor determines that a first overlap portion and a second overlap portion are continuous when a distance between the first overlap portion and the second overlap portion is within a predetermined distance in calculating the overlap length.

Medium conveying apparatus to detect multi-feed based on continuous overlap portion

A medium conveying apparatus includes a conveying roller to convey a medium, an end detection sensor for detecting a position of an end of the medium conveyed by the conveying roller, an overlap detection sensor for detecting an overlap of the medium conveyed by the conveying roller in a detection area, and a processor to determine whether an overlap detection is valid or invalid based on a positional relationship between the position of the end of the medium detected by the end detection sensor and the detection area, and execute an abnormality processing for multi-feed based on a detection result by the overlap detection sensor when it is determined that the overlap detection is valid.

Medium conveying apparatus to determine whether overlap detection is valid or invalid based on position of end of medium

A medium conveying apparatus includes a conveying roller to convey a medium, an imaging device to generate an input image acquired by imaging the conveyed medium, and a processor to extract edge pixels from the input image, detect a degree of roundness at a corner of the medium in the input image based on the edge pixels, determine whether the conveyed medium is an ID card based on the degree of roundness, and control the conveying roller based on a result of the determination or outputs the result of the determination.

Medium conveying apparatus for determining whether a conveyed medium is ID card

A medium conveying apparatus includes a conveying roller to convey a medium, a width detection sensor for detecting a width of the medium conveyed by the conveying roller in a direction perpendicular to a conveying direction, an overlap detection sensor for detecting an overlap of the medium conveyed by the conveying roller, and a processor to determine whether to execute an abnormality processing for a multi-feed, based on the width of the medium acquired based on a detection result by the width detection sensor and a detection result by the overlap detection sensor. The processor acquires an overlap detection width being a width in which the medium is estimated to overlap in the direction perpendicular to the conveying direction, based on the detection result by the overlap detection sensor. The processor executes the abnormality processing when the width of the medium and the overlap detection width are equal.

Medium conveying apparatus to execute abnormality processing for multi-feed based on overlap detection width

Provided are an image processing apparatus, a control method, and a control program to accurately determine whether or not a deflection of a fed medium has occurred, and to suitably control a feeding of the medium. A medium conveying apparatus includes a feed module to feed a medium, a motion detection module to detect a first change amount in a feeding direction of the medium placed on a medium tray and a second change amount in a direction perpendicular to a placing surface of the medium tray during feeding of the medium, a determination module to determine that a deflection of the medium has occurred when the first change amount is less than a first threshold value and the second change amount is equal to or more than a second threshold value, and a control module to stop feeding the medium according to the determination result.

Medium transport device, control method, and control program

Provided are a multi-feed detection apparatus, a control method, and a control program to suitably determine whether or not the multi-feed detection apparatus returns a fed medium to a direction of a medium tray when multi-feed has occurred. A multi-feed detection apparatus includes an ultrasonic sensor to generate an ultrasonic signal, a multi-feed determination module to determine that feeding of the medium is normal when a signal value of the ultrasonic signal is equal to or more than a first threshold value, and determine that a multi-feed of the medium has occurred when the signal value of the ultrasonic signal is less than the first threshold value, and a control module to control the feed module to return the fed medium to a direction of the medium tray when the signal value of the ultrasonic signal is less than a second threshold value smaller than the first threshold value.

Double feeding detection device, control method, and control program

A medium conveying apparatus includes a conveying roller to convey a rectangular medium, and a processor to generate an input image acquired by imaging the conveyed medium, detect an overlap of the conveyed medium, detect an object area from the input image, determine whether an outer shape of the object area is rectangular, determine whether a multi-feed of the medium has occurred based on whether the overlap of the medium has been detected and whether the outer shape of the object area is rectangular, and execute an abnormality processing when it is determined that the multi-feed of the medium has occurred.

Medium conveying apparatus to determine whether multi-feed has occurred based on whether outer shape of object area in input image is rectangular

Provided are a medium conveyance apparatus, control method, and control program is to enable more precisely detecting an end part in a main scan direction of a medium from an image. A medium conveyance apparatus includes a conveying module to convey a medium, an imaging device to capture an image of the conveyed medium, a storage device to store a low reliability region inside an input image of a medium captured by the imaging device based on a positional relationship between an imaging position of the imaging device and arrangement position of the conveying module, an edge pixel detection module to detect edge pixels from the input image, an end part detection module to detect an end part in a main scan direction of the medium based on edge pixels detected from a region not including the low reliability region inside the input image, and an output control module to output information relating to the detected end part.

Medium carrying device, control method, and control program

A medium conveying apparatus includes a conveying roller to convey a medium, and a processor to detect transmission information of an ultrasonic wave transmitted through the medium or thickness information of the medium at a plurality of positions in the conveyed medium, calculate a size of an area in which the transmission information or the thickness information is within a predetermined range in the conveyed medium, determine whether a multi-feed of the medium has occurred, by comparing a value based on the transmission information or the thickness information with a threshold, and execute an abnormality processing when it is determined that the multi-feed of the medium has occurred. The processor changes the threshold according to the size.

Medium conveying apparatus to change determination threshold for multi-feed of medium according to size of overlap area in medium

A light emitting element driving device includes a light emitting element to emit light in response to a supply of a first current, a first switching element to turn ON/OFF the first current supplied to the light emitting element, a second switching element to turn ON/OFF a second current not supplied to the light emitting element, a constant current circuit to adjust a total current amount of the first current and the second current to be constant, and a control circuit. The control circuit turns ON the first switching element in a state of flowing the second current to the second switching element by turning ON the second switching element, and after turning ON the first switching element, flows the first current to the light emitting element and the first switching element by turning OFF the second switching element.

Light emitting element driving device for preventing that overcurrent flows through light emitting element

A medium conveying apparatus includes a processor to detect edge pixel from a first line image and a second line image, select a first surface or a second surface of the medium, based on the number of the detected edge pixels, a comparison between a gradation value of each of the detected edge pixels and a gradation value of a peripheral pixel of each of the detected edge pixels, or a variation of gradation values of pixels within a predetermined distance from each of the detected edge pixels or the peripheral pixel of each of the detected edge pixels, estimate a shape of the medium based on a line image acquired by imaging the selected surface, and control a conveying roller or cut out a medium image from the first line image and the second line image and output the medium image, based on the estimated shape.

Medium conveying apparatus for estimating a shape of a conveyed medium based on a line image acquired by imaging a selected surface

A multi-feed detection apparatus includes a conveyance roller, an ultrasonic sensor for generating an ultrasonic signal, an imaging device to image the medium being conveyed by the conveyance roller and sequentially generate a line image, and a processor to detect a width of the medium in each line image for each line image, detect a vertex count of a medium included in the sequentially generated line image based on the width of the media in the each line image, detect a length of the medium in a direction perpendicular to the medium width, estimate a shape of a medium based on the vertex count and the length of the medium, and detecting media multi-feed by comparing the ultrasonic signal with a predetermined threshold value, and change the predetermined threshold value or stop detection of the medium multi-feed, based on the estimated shape of the medium.

Multi-feed detection apparatus for changing a threshold value for detecting multi-feed or stopping detection of multi-feed based on a shape of a medium

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Kahoku, Japan

Masaaki Sakai