CN2689355Y

CN2689355Y - Manual terminal with bar code scanning, radio frequency identifying and PDA functions

Info

Publication number: CN2689355Y
Application number: CN 200420011842
Authority: CN
Inventors: 尚雅琴; 田广东
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-21
Filing date: 2004-04-21
Publication date: 2005-03-30
Anticipated expiration: 2014-04-21

Abstract

The utility model provides a manual terminal with bar code scanning, radio frequency identifying and PDA functions, comprising a two dimensional bar codes scanning module, a radio transmitting module, and a master control computer PDA. Wherein, a single chip micyoco RXD terminal in the radio transmitting module is connected with the Rlout terminal of a level conversion chip, and the instructions from the PDA are received through an RS232 port; a TXD is connected with the Dout of a radio receiving/transmitting chip through two stages of amplifying circuits; the Din of the radio receiving/transmitting chip is connected with the P1. 6 of the single chip micyoco through a divider circuit; the TXEN of the radio receiving/transmitting chip is connected with the P1. 7 of the single chip micyoco through a signal amplifying and a divider circuits; reset signals RST are respectively connected with the RST/VPP terminal of the single chip micyoco and the RST terminal of a timer/counter. The manual terminal with bar code scanning, radio frequency identifying and PDA functions can scan various bar codes, comprising linearity bar codes and two dimensional bar codes, and can read radio frequency label, comprising active labels and passive labels, with radio frequency reading distance of 100 meters.

Description

Handheld terminal with bar code scan, radio-frequency (RF) identification and PDA function

Technical field:

The utility model provides a kind of handheld terminal with bar code scan, radio-frequency (RF) identification and PDA function, relates to automatic bar code technology and REID field.

Background technology

Existing barcode scanner is divided into off-line type and online, can only be as bar code scan, and function singleness.Online scanner can only be equivalent to keyboard and mouse as a kind of input mode; The off-line type bar-code scanner is equivalent to have the palm PC of bar code scan function, but its operating system, CPU, ROM and RAM have very big limitation, and can't support radio frequency identification module.Radio frequency identification module belongs to an accessory module, can't independently use, and must depend on PC or palm PC.At present, the most widely used on the market is two handheld terminal of Symbol company and Inermec company, this all is an external product, and bigger limitation is arranged,, have the two-dimensional bar code scan function and can develop small-sized application program thereon simultaneously as the handheld terminal of Symbol company, but its microprocessor dominant frequency is lower, be up to 206MHZ, RAM and ROM are lower, and the more important thing is does not have radio frequency recognition function; The handheld terminal of Inermec company, has the two-dimensional bar code scan function, the microprocessor dominant frequency can reach 400MHZ, RAM and ROM are higher, and RAM can extend to 128M, and machine itself does not comprise radio frequency identification module, but support radio-frequency module, and the Jacket formula radio frequency identification module of making to measure for this machine is specially arranged, but radio frequency identification module recognition close together can only reach 1.5 meters.And radio frequency identification module also can not see at home, and relevant data is just arranged.

Summary of the invention:

The utility model provides the radiofrequency emitting module that a kind of volume is little, communication distance reaches 50-100 rice, connect by the RS232 mouth with PDA, thereby provide have bar code scan, the all-in-one solution of radio-frequency (RF) identification and PDA function.On PDA, define four function keys, directly driven bar code scan module and radiofrequency emitting module.

The utility model has developed that volume is little, the recognition distance, can with the convenient radiofrequency emitting module that connect of palm PC, bar code scan module, radio frequency identification module are integrated into palm PC, form the novel hand-held device that integrates PDA, bar code scan, radio frequency recognition function.For easy to operate, numeric keypad and function key are set on machine.

Concrete technical solution is as follows: be made up of two-dimensional bar code scan module, wireless transmitter module and main control computer PDA, wherein, the two-dimensional bar code scan module is connected by the CF mouth with PDA, and radio frequency identification module and PDA link by the RS232 mouth.

Function button on the PDA is defined as bar code scan, roll-call, reading and recording and rewriting record button.

Wireless transmitter module is made up of single-chip microcomputer, rf chip, the chip that resets, serial ports conversion chip and antenna circuit and peripheral circuit.Wherein, the Rlout of the RXD termination level transferring chip of single-chip microcomputer end is by the instruction of RS232 mouth reception from PDA; TXD links through the Dout of two-stage amplifying circuit and radio transmitting and receiving chip, and the Din of radio transmitting and receiving chip links by the P1.6 of bleeder circuit and single-chip microcomputer; The TXEN of radio transmitting and receiving chip links through the P1.7 of signal amplification and bleeder circuit and single-chip microcomputer, controls the working method of radio transmitting and receiving chip by the height of TXEN pin level: send and receive (when TXEN is high level, the transmission signal; When TXEN is low level, received signal).

The P3.7 of single-chip microcomputer links with the WDI end of the chip that resets, and links by not circuit and PFO end; Reset signal RST links with the RST/VPP end of single-chip microcomputer and the RST end of timer/counter respectively.

Concrete operations are as follows:

Press the roll-call button and can carry out the roll-call of container register, realize the searching of special article; Press the reading and recording button, open corresponding interface, select the register numbering, promptly can read the material information in the corresponding container, promptly the record data in the register by the management information system in the PDA, carry out the renewal of database; Press the rewriting record button, open respective interface, selecting container character is register number, calls in material information in the respective episode vanning, the rewriting of executive logging device data by the management information system in the PDA.

Concrete principle of work is as follows:

When operating personnel press bar code scan button on the PDA, PDA sends the bar code scan instruction, start the work of bar code scan module, the image that scanning comes is reduced into numerical information through decoding scheme with picture information, by the CF mouth data are reached palm PC, the management information system that is stored in palm PC is handled the information of scanning.

When operating personnel press roll-call button on the PDA, PDA sends the order of calling the roll, and signal is gone into the Rlin end of MAX202 by the RS232 oral instructions, and the signal after the level conversion passes the end from the RXD of single-chip microcomputer by the Rlout end, and application is simultaneously interrupted; The PWR-UP end level of radio transmitting and receiving chip is changed to high level, makes radio transmitting and receiving chip in running order, and CS is set to low level, and frequency is made as 433.92MHZ; The P1.7 end output high level of single-chip microcomputer makes radio transmitting and receiving chip be operated in sending mode; P1.6 holds the Din that instruction is reached radio transmitting and receiving chip, and instruction is carried on the carrier signal of characteristic frequency through encrypting, encoding, and outwards sends with 20Kbit/S through antenna.

When operating personnel press the reading and recording button, PDA sends the reading and recording order, and signal is gone into the Rlin end of MAX202 by the RS232 oral instructions, and the signal after the level conversion passes the end from the RXD of single-chip microcomputer by the Rlout end, and application is simultaneously interrupted; The P1.7 end output high level of single-chip microcomputer makes radio transmitting and receiving chip be operated in sending mode; The P1.6 end will instruct and register is numbered the Din that data reach radio transmitting and receiving chip, and signal is carried on the carrier signal of characteristic frequency through after encrypting, encoding, and outwards sends with 20Kbps through antenna.After the response of radio frequency register, the signal that antenna receiving record device is sent, radio transmitting and receiving chip NRF401 modulates, decodes, deciphers signal, issues single-chip microcomputer by the DOUT end, and application is simultaneously interrupted; The single-chip microcomputer response is interrupted, and P1.7 holds output low level, makes radio transmitting and receiving chip be operated in receiving mode, begins to receive data.Receive the data process FSK demodulation that comes, the TXD that is reached single-chip microcomputer by the DOUT end holds, and passes through level conversion again, directly passes to PDA by RS232.Carry out information processing by the management information system that is carried on the PDA.

When operating personnel press the rewriting record button, PDA sends the rewriting record order, and signal is gone into the Rlin end of MAX202 by the RS232 oral instructions, and the signal after the level conversion passes the end from the RXD of single-chip microcomputer by the Rlout end, and application is simultaneously interrupted; The P1.7 end output high level of single-chip microcomputer makes radio transmitting and receiving chip be operated in sending mode; Signal is held the DIN that reaches radio transmitting and receiving chip by P1.6, and after encrypting, encoding, signal loading is launched through antenna on the carrier signal of characteristic frequency.

Good effect of the present utility model is: three shared power-supply systems of functional module, RAM, ROM, an operating system.Various bar codes be can scan, linear code (EAN13 sign indicating number, EAN8 sign indicating number, codebar sign indicating number etc.) and two-dimensional bar code (PDF417 sign indicating number and QR sign indicating number) comprised.Can read radio-frequency (RF) tag, comprise (active label and passive label), radio frequency recognition distance can reach 100 meters.Set up function button, easy and simple to handle.

Description of drawings:

Fig. 1 is the utility model principle of work block diagram.

Fig. 2 is the utility model wireless transmitter module circuit theory diagrams.

Embodiment:

According to shown in Figure 1, for all-in-one, the two-dimensional bar code scan module links by CF mouth and palm PC; Radio frequency identification module and palm PC link by the RS232 mouth.

According to shown in Figure 2, the RXD of single-chip microcomputer end links with the Rlout end of level transferring chip MAX202, by the instruction of RS232 mouth reception from PDA; TXD links through the Dout of two-stage amplifying circuit and radio transmitting and receiving chip NRF401, and the Din of NRF401 links by the P1.6 of bleeder circuit and single-chip microcomputer; The TXEN of NRF401 links through the P1.7 of signal amplification and bleeder circuit and single-chip microcomputer, controls the working method of NRF401 by the height of TXEN pin level: send and receive (when TXEN is high level, the transmission signal; When TXEN is low level, received signal).

The P3.7 of single-chip microcomputer links with the WDI end of the chip MAX813L that resets, links by not circuit and PFO end; Reset signal RST links with the RST/VPP end of single-chip microcomputer and the RST end of timer/counter respectively.

Claims

1, a kind of handheld terminal with bar code scan, radio-frequency (RF) identification and PDA function, it is characterized in that: form by two-dimensional bar code scan module, wireless transmitter module and main control computer PDA, wherein, the two-dimensional bar code scan module is connected by the CF mouth with PDA, and radio frequency identification module and PDA link by the RS232 mouth;

Described wireless transmitter module is made up of single-chip microcomputer, rf chip, the chip that resets, serial ports conversion chip and antenna circuit and peripheral circuit; Wherein, the Rlout of the RXD termination level transferring chip of single-chip microcomputer end is by the instruction of RS232 mouth reception from PDA; TXD links through the Dout of two-stage amplifying circuit and radio transmitting and receiving chip, and the Din of radio transmitting and receiving chip links by the P1.6 of bleeder circuit and single-chip microcomputer; The TXEN of radio transmitting and receiving chip links through the P1.7 of signal amplification and bleeder circuit and single-chip microcomputer, control the working method of radio transmitting and receiving chip by the height of TXEN pin level: the P3.7 of single-chip microcomputer links with the WDI end of the chip that resets, and links by not circuit and PFO end; Reset signal RST links with the RST/VPP end of single-chip microcomputer and the RST end of timer/counter respectively.