Nippondenso Co., Ltd.

Takeshi Watanabe

Tadao Nojiri

Koji Konosu

Kenzo Obata

Yoshimi Kitazumi

Kouji Teramae

Yosimi Kitazumi

Yukiko Uno

A portable radio station 1a transmits a communication-quality-confirmation pattern data 'f' to a stationary radio station 2a, wherein a first communication quality information '1' is produced by measuring erroneous bits of the received signal. The first communication quality information '1' is transmitted from the stationary radio station 2a to the portable radio station 1a, together with a communication-quality confirmation pattern data 'n'. The portable radio station 1a receives both the first communication quality information '1' and the communication-quality confirmation pattern data 'n', and produces a second communication quality information by measuring erroneous bits of the received signal. Then, the first and second communication quality information are independently displayed on a display section 18 of the portable radio station 1a.

Radio data communication system comprising a common base radio station

To accurately read optical information more than an opening diameter of a read opening without the read opening contacted with a reading object, in a reader for reading a bar code by irradiating light from a light source to a bar-code label, converging the reflected light through a mirror and a stop by a lens and focusing the converged light on a line image sensor with a shutter, a wavelength detector for detecting a wavelength of the reflected light and a light guide for irradiating light spots indicative of a readable range to the label are provided. Whether a reading state is in a contact reading state in which a read opening contacts the label or in a noncontact reading state in which the read opening separates from the label is determined based on a wavelength of the reflected light detected by the wavelength detector. A light emission quantity and a shutter speed are controlled so as to keep an incident light quantity to the image sensor at an optimum value on a basis of the decided result and reflected light intensity obtained by integrating a line sensor output.

Optical information reader

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Kariya, Japan

Takeshi Watanabe