Registers – Coded record sensors – Particular sensor structure
Patent
1995-11-22
1999-09-07
Pitts, Harold I.
Registers
Coded record sensors
Particular sensor structure
23546222, G06K 710
Patent
active
059490560
ABSTRACT:
A portable, hand-held data terminal of modular structure includes a base module with a keyboard and a display screen. A data collection and communications module includes a stacked arrangement of a communications interface main circuit board, a radio and a laser scanner assembly which are housed in a housing shell which is attachable to the base module. The radio is mounted in spaced relationship to one side of the main circuit board, while the laser scanner assembly is mounted to the other side of the main circuit board. A support frame and a plurality of ground planes in the sandwiched main circuit board and a routing circuit board form an RF cage for shielding RF interference which may be generated by the radio. Also disclosed is a method for reducing the operational power consumption requirements of laser bar code scanners by analyzing reflected laser light in order to determine the presence of optically readable information sets. In a first embodiment, the reflected light intensity of a pulsed laser light beam is compared to the ambient light intensity to provide a control signal to actuate the scanning mode if a threshold differential is satisfied. In a second embodiment, a modulated laser light pulse is filtered to remove ambient light noise and then provides a control signal to actuate the scanning mode if a threshold value is reached.
REFERENCES:
patent: 3976973 (1976-08-01), Martin et al.
patent: 4207527 (1980-06-01), Abt
patent: 4385285 (1983-05-01), Horst et al.
patent: 4418277 (1983-11-01), Tremmel et al.
patent: 4461292 (1984-07-01), Tunnell et al.
patent: 4540897 (1985-09-01), Takaoka et al.
patent: 4556983 (1985-12-01), Heitmann et al.
patent: 4560862 (1985-12-01), Eastman et al.
patent: 4569421 (1986-02-01), Sandstedt
patent: 4584690 (1986-04-01), Cafiero et al.
patent: 4628193 (1986-12-01), Blum
patent: 4727245 (1988-02-01), Dobbins et al.
patent: 4749353 (1988-06-01), Breedlove
patent: 4785717 (1988-11-01), Rocholl et al.
patent: 4820911 (1989-04-01), Arackellian et al.
patent: 4831275 (1989-05-01), Drucker
patent: 4841129 (1989-06-01), Tawara et al.
patent: 4850009 (1989-07-01), Zook et al.
patent: 4857716 (1989-08-01), Gombrich et al.
patent: 4877949 (1989-10-01), Danielson et al.
patent: 4882476 (1989-11-01), White
patent: 4897532 (1990-01-01), Swartz et al.
patent: 4897857 (1990-01-01), Wakatsuki et al.
patent: 4902883 (1990-02-01), Poland
patent: 4910753 (1990-03-01), Wakatsuki et al.
patent: 4933538 (1990-06-01), Heiman et al.
patent: 4984881 (1991-01-01), Osada et al.
patent: 5052020 (1991-09-01), Koenck et al.
patent: 5055660 (1991-10-01), Bertagna et al.
patent: 5107100 (1992-04-01), Shepard et al.
patent: 5313053 (1994-05-01), Koenck et al.
patent: 5420411 (1995-05-01), Salatto et al.
Norand Corporation
Pitts Harold I.
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