Fujitsu Corporation

Copal Company Limited

Kazumasa Moriya

Tomoyuki Kashiwazaki

Shinichi Sato

Motohiko Itoh

Yoshitaka Murakawa

Toshimasa Miyazaki

Hiroshi Kawashima

Kazuyoshi Okawa

Mitsuo Watanabe

Akihiro Nakamura

Hiroaki Kawai

Ichiro Shinoda

Takeshi Ishii

Toshimitsu Kumagai

Tatsuo Sasaki

Tamotsu Takahashi

Yoshihiro Oyama

Yoji Uzawa

Hiroaki Katoh

Yukio Yoshikawa

Akira Okawado

Nobuyuki Kitamura

A bar code reader using a high speed scanner, containing: a scanning unit scanning a surface on which a bar code is printed; a bar width detecting unit successively detecting widths of bars; a bar width storing unit storing the widths; an address generating unit generating an address of the bar width storing unit at which each of the widths is to be stored; a fast screening unit determining whether a set of widths successively detected by the bar width detecting unit satisfies a predetermined condition for the set of widths constituting a complete bar code; and a bar code decoding unit reading a set of successive widths from the generated address, and decoding the bar code determined by the complete bar code detecting unit. A type of bar code detecting unit detecting a type of bar code constituted by the detected widths, and an address & type storing unit storing the detected type of bar code, together with information on the generated addresses for the widths of the bar code, may be inserted. The bar code decoding unit contains specific type decoding units for respectively decoding types of bar codes. The bar code decoding unit reads the stored widths from the addresses indicated by the information stored in the address & type storing unit, and decodes the bar code using one of the specific type decoding unit corresponding to the type stored in the address & type storing unit together with the above information.

High speed scan bar code reader which can read more than one type of bar

A compact type bar code reader for detecting a bar code symbol provided on a surface of an article. The bar code reader includes a laser beam generation unit for generating the laser beam to be irradiated onto a bar code symbol, and a focus unit for determining a focus of the laser beam, and a scanning pattern forming unit for forming various scanning patterns of the laser beam. The bar code reader also includes a light reflection unit for reflecting the laser beam to and from the bar code symbol, a light collection unit for collecting the laser beam reflected from the bar code symbol, and a light reception unit for receiving the laser beam collected by the light collection unit, and converting it to an electrical signal. The above units are included in a casing so that the laser beam generation unit, the focus unit, the light collection unit, and the light reception unit are arranged at a lower portion of the casing, and the scanning pattern forming unit and light reception unit are arranged at a lower portion of the casing. The light path of the laser beam is formed in such a way that an emitted light path from the laser beam generation unit to the bar code symbol becomes considerably long, and a reflected light path from the bar code symbol to the light reception unit becomes shorter than the emitted light path.

Compact type bar code reader

A semiconductor laser driving circuit has a semiconductor laser for emitting a laser beam according to a drive power. A photodetector is provided for effecting photo-electric conversion of the laser beam to output a corresponding electric signal. A monitoring circuit is connected for monitoring the electric signal to output a monitor signal indicative of variation in intensity of the laser beam. A controlling circuit is connected for comparing the monitor signal with a given reference signal to output a control signal according to difference therebetween. A powering circuit is operative according to the control signal to apply to the semiconductor laser a drive power effective to eliminate the difference. An abnormality detecting circuit is provided for comparing the monitor signal with a given limit signal which is set different from the reference signal to detect abnormality to output an abnormality signal.

Semiconductor laser driving circuit

A circuit for processing an analog electric signal which is obtained from a photoelectric transformation of a reflected light when scanning a bar code by a light beam. The circuit includes a differentiating circuit for differentiating the analog electric signal, a delay circuit for delaying the output of the differentiating circuit; a first gate signal generating circuit for generating a first gate signal which is active when the level of the output of the differentiating circuit is higher than a positive threshold, a second gate signal generating circuit for generating a second gate signal which is active when the level of the output of the differentiating circuit is lower than a negative threshold, and a comparing circuit for comparing the output of the differentiating circuit with the output of the delay circuit. The output of the comparing circuit being one binary level when the level of the output of the differentiating circuit is higher than the level of the output of the delay circuit, and the output of the comparing circuit is the opposite binary level when the level of the output of the differentiating circuit is lower than the level of the output of the delay circuit. A first gate circuit for detecting transition points in the output of the comparing circuit when the first gate signal is active, and a second gate circuit for detecting transition points in the output of the comparing circuit when the second gate signal is active, are also provided.

Circuit for processing analog signal obtained by scanning bar code

A linear motor car system including a horizontal conveyance path, a vertical conveyance path, and a curved conveyance path connected between the horizontal and vertical conveyance paths. A controller in the linear motor car system drives a carrier so that the cariier can ascend smoothly up the curved and vertical conveyance paths with the minimum driving energy and without accidentally falling back down the vertical path.

Linear motor car system

A linear motor car system including a horizontal conveyance path, a vertical conveyance path, and a curved conveyance path connected between the horizontal and vertical conveyance paths. A controller in the linear motor car system drives a carrier so that the carrier can ascend smoothly up the curved and vertical conveyance paths with the minimum driving energy and without accidentally falling back down the vertical path.

A transport control system with linear motor drive applicable for cash transport in a bank. The system uses a main controller, a rail-path, a carrier adapted to be driven along the rail-path by linear motor drive, and a plurality of stator portions coupled to the rail-path to produce a driving force in association with the carrier. Each of the stator portions includes a stator controller for controlling the driving of the carrier. The stator controller controls the driving of the carrier passing the stator portion to which the stator controller belongs to cause the carrier to reach a destination stator portion.

Transport control system with linear motor drive

Growing community of inventors

Urawa, Japan

Kazumasa Moriya