IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0342433
(2003-01-12)
|
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발명자
/ 주소 |
- Schmidt,Mark
- Russell,Garrett
- Wilz, Sr.,David M.
- Blake,Robert
- Hudrick,Donald T.
- Colavito,Stephen J.
- Knowles,C. Harry
- Rockstein,George
- Zhu,Xiaoxun
- Bonanno,John
- Byun,Sung
- Xu,Congwei
- Jiang,Mi
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| 출원인 / 주소 |
- Metrologic Instruments, Inc.
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| 인용정보 |
피인용 횟수 :
7 인용 특허 :
116 |
초록
▼
A wireless bar code symbol reading system for use in a work environment, comprising a wireless hand-supportable bar code symbol reader in two-way RF communication with a base station operably connected to a host system, by way of an RF-based wireless data communication link having a predetermined RF
A wireless bar code symbol reading system for use in a work environment, comprising a wireless hand-supportable bar code symbol reader in two-way RF communication with a base station operably connected to a host system, by way of an RF-based wireless data communication link having a predetermined RF communication range over which two-way communication of data packets can occur in a reliable manner. When the wireless bar code symbol reader is located inside of the predetermined RF communication range based on measuring the strength of the detected reference signal, it automatically transmits to the base station, the symbol character data string produced while the reader is located inside of the predetermined RF communication range. When the wireless reader is located outside of the range, based on measuring the strength of said detected reference signal, the reader automatically collects and stores the symbol character data string produced during that time.
대표청구항
▼
What is claimed is: 1. A wireless bar code symbol reading system for use in a work environment, said wireless bar code symbol reading system comprising: (A) a wireless hand-supportable bar code symbol reader in two-way RF communication with a base station operably connected to a host system, by way
What is claimed is: 1. A wireless bar code symbol reading system for use in a work environment, said wireless bar code symbol reading system comprising: (A) a wireless hand-supportable bar code symbol reader in two-way RF communication with a base station operably connected to a host system, by way of an RF-based wireless data communication link having a predetermined RF communication range over which two-way communication of data packets can occur in a reliable manner, said wireless hand-supportable bar code symbol reader including (1) a hand-supportable housing; (2) a bar code symbol reading mechanism, disposed in said hand-supportable housing, for automatically reading a bar code symbol on an object and automatically producing a symbol character data string representative of said read bar code symbol; (3) a first RF-based transceiver circuit, disposed in said hand-supportable housing, for transmitting to said base station, groups of data packets associated with said produced symbol character data string; (4) a data packet group buffer, disposed in said hand-supportable housing, for buffering one or more groups of data packets associated with said symbol character data string produced in response to the reading of a bar code symbol by said bar code symbol reading mechanism; (5) a data transmission circuit, disposed in said hand-supportable housing, for transmitting said produced symbol character data string to either said first RF-based transceiver circuit or said data packet group buffer; (6) a device controller, disposed within said hand-supportable housing, for controlling the operation of said wireless hand-supportable bar code symbol reader; and (B) said base station installable within a work environment and including (1) a base station housing, (2) a second RF-based transceiver circuit, disposed within said base station housing, for receiving groups of data packets corresponding to the symbol character data string transmitted from said first RF-based transceiver circuit, and (3) a base station controller mounted in said base station housing, for controlling the operation of said base station; wherein said first and second RF-based transceiver circuits enable a RF-based wireless data communication link between said wireless hand-supportable bar code reader and said base station; wherein said first and second RF-based transceiver circuits cooperate to enable the communication of data packets between said wireless hand-supportable bar code symbol reader and said base station, over said RF-based wireless data communication link; wherein said second RF-based transceiver includes means for automatically generating and transmitting a reference signal to said first RF-based transceiver circuit over said RF-based wireless data communication link; wherein said first RF-based transceiver circuit includes means for automatically receiving said reference signal and detecting the strength of said reference signal; wherein said device controller is programmed to automatically detect when said wireless hand-supportable bar code symbol reader is located inside of said predetermined RF communication range based on measuring the strength of said detected reference signal, and thereupon to automatically transmit to said second RF-based transceiver, the symbol character data string produced while said wireless hand-supportable bar code symbol reader is located inside of said predetermined RF communication range; and wherein said device controller is programmed to automatically detect when said wireless hand-supportable bar code symbol reader is located outside of said predetermined RF communication range based on measuring the strength of said detected reference signal, and thereupon to automatically collect and store in said data packet group buffer, the symbol character data string produced while said wireless hand-supportable bar code symbol reader is located outside of said predetermined RF communication range. 2. The wireless bar code symbol reading system of claim 1, wherein said wireless hand-supportable bar code reader further comprises an out-of-communication range indicator, integrated with said hand-supportable housing, for generating an audible and/or visual signal indicative that said wireless hand-supportable bar code symbol reader is located outside said predetermined RF communication range; wherein said device controller for controls said data transmission circuit, said data packet group buffer and said out-of-communication range indicator. 3. The wireless bar code symbol reading system of claim 2, wherein said device controller is further programmed to cause said out-of-communication range indicator to automatically generate audible and/or visual signal when said wireless hand-supportable bar code symbol reader is detected as being located outside of said predetermined RF communication range based on measuring the strength of said detected reference signal. 4. The wireless bar code symbol reading system of claim 1, wherein said base station further comprises: a cradle portion adapted for receiving said hand-supportable housing. 5. The wireless bar code symbol reading system of claim 4, wherein said cradle includes a radio antenna. 6. The wireless bar code symbol reading system of claim 1, wherein said data packet group buffer is realized as a memory chip installed aboard said hand-supportable housing. 7. The wireless bar code symbol reading system of claim 1, wherein said reference signal is a heartbeat-type signal generated from said second RF-based transceiver circuit. 8. The wireless bar code symbol reading system of claim 1, wherein said first RF-based transceiver circuit and said device controller are realized as first RF-based chipset disposed within said hand-supportable housing. 9. The wireless bar code symbol reading system of claim 1, wherein said second RF-based transceiver circuit and said base station controller are realized as second RF-based chipset disposed within said base station housing. 10. The wireless bar code symbol reading system of claim 1, which further comprises a good read indicator, integrated with said hand-supportable housing, for indicating when a bar code symbol is read by said bar code symbol reading mechanism and a symbol character data string representative thereof is produced. 11. The wireless bar code symbol reading system of claim 1, wherein said device controller is further programmed so that said device controller automatically tests said RF-based wireless data communication link prior to transmitting symbol character data, stored in said data packet group buffer, to said first RF-based transceiver circuit when said data transmission control activation signal is generated while said wireless hand-supportable bar code symbol reader is once again located inside of said predetermined RF communication range. 12. The wireless bar code symbol reading system of claim 1, wherein said device controller is programmed so that symbol character data stored within said data packet group buffer can be cleared by holding down said manually-operated data transmission activation switch for a second predetermined time duration. 13. The wireless bar code symbol reading system of claim 1, wherein said bar code symbol reading mechanism comprises an automatically-activated laser scanning bar code symbol reading mechanism capable of producing a visible laser scanning pattern for automatically reading a bar code symbol on an object and automatically producing a symbol character data string representative of said read bar code symbol. 14. The wireless bar code symbol reading system of claim 1, which further comprises an objection detection subsystem disposed within said hand-supportable housing and including infrared (IR) signal transmission/receiving circuitry for automatically detecting said object within an object detection field definable relative to said hand-supportable housing. 15. The wireless bar code symbol reading system of claim 1, which further comprises an objection detection subsystem disposed within said hand-supportable housing, and including low-power non-visible laser beam signaling mechanism for automatically detecting said object within an object detection field definable relative to said hand-supportable housing.
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