Automatically-activated hand-supportable laser scanning bar code symbol reading system with data transmission activation switch
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06K-007/10
G06K-009/22
출원번호
US-0863863
(2001-05-23)
발명자
/ 주소
Wilz, Sr., David M.
Rockstein, George
Blake, Robert E.
Schmidt, Mark
Russell, Garrett
Knowles, C. Harry
출원인 / 주소
Metrologic Instruments, Inc.
대리인 / 주소
Perkowski, Esq., P.C., Thomas J.
인용정보
피인용 횟수 :
22인용 특허 :
75
초록▼
Disclosed is an automatically-activated code symbol reading system comprising a code symbol reading mechanism contained within a hand-supportable housing having a manually-actuatable data transmission switch. The symbol reading mechanism automatically generates a visible laser scanning pattern for r
Disclosed is an automatically-activated code symbol reading system comprising a code symbol reading mechanism contained within a hand-supportable housing having a manually-actuatable data transmission switch. The symbol reading mechanism automatically generates a visible laser scanning pattern for repeatedly reading one or more code symbols on an object during each symbol reading cycle, and automatically generating a new symbol character data string in response to each read symbol. The user visually aligns the laser scanning pattern with a code symbol on an object. Each time the scanned symbol is successfully read in a cyclical manner, a new symbol character string is produced, and an indicator light is actively driven. During the symbol reading cycle, the user actuates the data transmission switch producing a data transmission control activation signal and enabling a subsequently produced symbol character data string to be automatically selected and transmitted to the host system.
대표청구항▼
Disclosed is an automatically-activated code symbol reading system comprising a code symbol reading mechanism contained within a hand-supportable housing having a manually-actuatable data transmission switch. The symbol reading mechanism automatically generates a visible laser scanning pattern for r
Disclosed is an automatically-activated code symbol reading system comprising a code symbol reading mechanism contained within a hand-supportable housing having a manually-actuatable data transmission switch. The symbol reading mechanism automatically generates a visible laser scanning pattern for repeatedly reading one or more code symbols on an object during each symbol reading cycle, and automatically generating a new symbol character data string in response to each read symbol. The user visually aligns the laser scanning pattern with a code symbol on an object. Each time the scanned symbol is successfully read in a cyclical manner, a new symbol character string is produced, and an indicator light is actively driven. During the symbol reading cycle, the user actuates the data transmission switch producing a data transmission control activation signal and enabling a subsequently produced symbol character data string to be automatically selected and transmitted to the host system. stantaneous radiation detected by said photoreceiver; and a processor cooperating with said comparator to (i) command emission of radiation by said photoemitter in a first operating mode of said reader whenever said input signal is less than at least one predetermined and fixed reference value, and (ii) command emission of radiation to read said optical code by said photoemitter in a second operating mode of said reader whenever said input signal is greater than said at least one predetermined and fixed reference value, wherein after said first operating mode is deactivated, said processor is operable to switch on said photoemitter; switch off said photoemitter prior to reading said optical code; switch on said photoemitter in order to supply radiation for reading said optical code; and read said optical code. 8. The reader according to claim 7, further comprising an amplifier having automatic gain control and operable to receive an electrical signal from said photoreceiver and, wherein said processor is further operable to disable said automatic gain control in said first operating mode, and enable said automatic gain control in said second operating mode to instantaneously control said amplifier gain. 9. The reader according to claim 7, further comprising means for energy saving, which can be activated during said first operating mode. 10. The reader according to claim 9, wherein said energy-saving means includes means for regulating said radiation such that said photoemitter emits said radiation discontinuously over a period of time during said first operating mode and emits said radiation continuously over a period of time during said second operating mode. 11. The reader according to claim 7, wherein said processor includes a low-consumption operating state and a high-consumption operating which can be selected alternately, such that in said first operating mode, said low-consumption operating state is activated, and in said second operating mode, said high-consumption operating state is activated. 12. The reader according to claim 7, wherein said reader is portable and comprises a case that can be grasped and that holds said photoemitter and said photoreceiver. 13. A method for reading an optical code using a reader which comprises a photoemitter, a photoreceiver, a processor, said method comprising: emitting radiation from said photoemitter out of said reader; monitoring at least one operating condition of said reader; activating a first operating mode of said reader when said operating condition is not detected, said radiation being emitted from said photoemitter in a discontinuous manner in said first operating mode; and activating a second operating mode of said reader when said operating condition is detected, wherein in said second operating mode, said photoemitter is activated to emit said radiation in a continuous manner, said photoemitter is then deactivated prior to any reading attempt of said optical code, and said photoemitter is then activated to emit said radiation in a continuous manner and to read said optical code. 14. The method according to claim 13, wherein said steps of deactivating said photoemitter and then activating said photoemitter to emit said radiation in a continuous manner are preceded by respective waiting steps. 15. A reader for an optical code, comprising: a photoemitter operable to emit radiation onto said optical code; a photoreceiver for detecting at least part of said radiation diffused by said optical code; an amplifier having automatic gain control and operable to receive an electrical signal from said photoreceiver; and a processor having a detector operable to receive said electrical signal from said amplifier and to detect a presence of at least one operating condition of said reader based thereon, said processor (i) activating a first operating mode of said reader when said operating condition is not detected, said automatic gain control being disabled in said first operating mode; (ii) activating a second operating mode of said reader when said operating condition is detected, said automatic gain control being enabled in said second operating mode; (iii) activating said photoemitter for a time that is sufficient to permit any overshoot of said amplifier to end; (iv) subsequently deactivating said photoemitter; and (v) subsequently activating said photoemitter in order to carry out illumination and reading of said optical code. 16. A reader for an optical code, compromising: a photoemitter operable to emit radiation onto said optical code; a photoreceiver for detecting at least part of said radiation diffused by said optical code; an amplifier having automatic gain control and operable to receive an electrical signal from said photoreceiver; and a processor having a detector operable to receive said electrical signal from said amplifier and to detect a presence of at least one operating condition of said reader based thereon, said processor (i) activating a first operating mode of said reader when said operating condition is not detected, said automatic gain control being disabled in said first operating mode; (ii) activating a second operating mode of said reader when said operating condition is detected, said automatic gain control being enabled in said second operating mode, wherein said amplifier comprises: a first signal amplifier connected at an input to said photoreceiver; a resistive divider for receiving at least part of an output signal of said first signal amplifier and including a resistor having a variable resistance controlled by a command signal, said command signal being correlated to a level present at an output of said amplifier; second signal amplifier means for receiving an intermediate signal that includes at least part of a signal present on said resistor, said intermediate signal being variable based on said command signal whenever said second operating mode is activated. 17. The reader according to claim 16, wherein said amplifier further includes an auxiliary resistor in parallel with said resistor in order to render negligible a variation in said intermediate signal caused by a variation of said command signal, said auxiliary resistor being available in parallel to said resistor whenever said first operating mode is activated. 18. The reader according to claim 17, wherein said resistor includes a field-effect transistor. members, and to allow differential capacitive readout.
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이 특허에 인용된 특허 (75)
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Rockstein George (Audubon NJ) Wilz ; Sr. David (Sewell NJ) Blake Robert (Woodbury NJ) Knowles C. Harry (Moorestown NJ), Automatic bar code reading system having selectable long range and short range modes of operation.
Knowles Carl H. (Moorestown NJ) Rockstein George B. (Audubon NJ) Wilz David M. (Sewell NJ) Naylor Charles A. (Sewell NJ), Automatic hand-supportable code symbol scanning device with improved laser beam pointing efficiency.
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