CN201936440U

CN201936440U - Portable data acquisition terminal

Info

Publication number: CN201936440U
Application number: CN2011200020026U
Authority: CN
Inventors: 肖志良
Original assignee: FOSHAN ANSURE INTELLIGENT TECHNOLOGY Co Ltd
Current assignee: FOSHAN ANSURE INTELLIGENT TECHNOLOGY Co Ltd
Priority date: 2011-01-06
Filing date: 2011-01-06
Publication date: 2011-08-17
Anticipated expiration: 2021-01-06

Abstract

The utility model belongs to the field of wireless transmission and particularly relates to a portable data acquisition terminal. The portable data acquisition terminal comprises a singlechip, a 4*4 keyboard connected with the singlechip, an LCD, an RFID (radio frequency identification) card reader, and a wireless data transmission module, wherein the singlechip is an ARM7 series singlechip; and the wireless data transmission module is a device with a model number of Zigbee CC1100. The utility model has the benefits that firstly, an asymmetrical radio frequency signal emission and acquisition circuit is adopted, so that the energy consumption is greatly reduced, the structure is reasonable, the use is simple, and the operation is convenient and reliable; secondly, a plurality of communication modes are available for selection based on different application occasions, and the transmission speed is high; thirdly, frequency hopping is realized and the anti-interference ability is strong; and fourthly, a carrier monitoring mechanism, as well as an anti-collision process algorism is adopted, so as to effectively solve the collision problem when multiple terminals initiatively send data, and the transmission speed problem when the terminal amount is large.

Description

Portable data acquisition terminal

Technical field

The utility model belongs to field of wireless transmission, relates in particular to a kind of portable data acquisition terminal.

Background technology

At present no matter big supermarket or storage goods yard every day to a large amount of goods of need making an inventory, popularization and application along with computer technology, just need lot of data typing work every day, the application of cable data collector greatly reduces staff's labour intensity, but the restriction of being connected up can not adapt to the inconvenient application scenario of wiring; Though and the wireless type data terminal has solved wiring problem, the rfid card technology has proposed a kind of data acquisition device, but also there is the big inconvenient problem with use of power consumption in present data acquisition device, particularly at terminal quantity more for a long time, access speed obviously reduces, and can't adapt to the application scenario that the multiple terminals initiatively sends data.

Summary of the invention

The purpose of this utility model is to have proposed a kind of portable data acquisition terminal for addressing the above problem, and this portable data acquisition terminal is rational in infrastructure, power saving, simple to operate.

To achieve these goals, the technical solution of the utility model is: a kind of portable data acquisition terminal, include a single-chip microcomputer, and what be connected with single-chip microcomputer is 4X4 keyboard, LCD, rfid card card reader and wireless data transmission module; Wherein, described single-chip microcomputer is the ARM7 series monolithic, and described wireless data transmission module is that model is the device of " Zigbee CC1100 ".

Described rfid card card reader comprises MFRC500 series circuit, the MFRC500 circuit has connected an asymmetrical emission of radio frequency signals, Acquisition Circuit, described asymmetrical emission of radio frequency signals, Acquisition Circuit is by inductance, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5, resistance R 1, resistance R 2 and induction chip are formed, the transmitting terminal TX of described inductance one termination MFRC500 circuit, an another termination capacitor C 1 of inductance and an end of capacitor C 2, the other end ground connection of capacitor C 1, an another termination capacitor C 3 of capacitor C 2 and an end of capacitor C 4, other end connecting resistance R1 one end of capacitor C 3, the receiving end RX of another termination MFRC500 circuit of resistance R 1, an another termination capacitor C 5 of capacitor C 4 and an end of resistance R 2, the other end ground connection of capacitor C 5, another termination induction chip of resistance R 2.

The inductance value of described inductance is 33mH, and the electric capacity of capacitor C 1 is 68P, and described capacitor C 2 is 33P to the electric capacity of capacitor C 5, and the resistance value of described resistance R 1 is 830 ohm, and the resistance value of described resistance R 2 is 1000 ohm.

The beneficial effect that the utility model is compared the prior art generation is:

1, adopt asymmetrical emission of radio frequency signals, Acquisition Circuit that energy consumption is significantly reduced, rational in infrastructure, use simply convenient and reliable operation;

2, at different application scenarios, there is multiple communication mode available, transmission speed is fast;

3, realize frequency hopping, antijamming capability is strong;

4, adopt the mechanism of carrier sense, add the algorithm that anticollision is handled, efficiently solve the collision problem of multiple terminals when initiatively sending data, and terminal quantity transmission speed problem more for a long time.

Below in conjunction with drawings and Examples the utility model being done one describes in detail.

Description of drawings

Fig. 1 is the utility model circuit structure block diagram;

Fig. 2 is the asymmetrical emission of radio frequency signals of the utility model, Acquisition Circuit synoptic diagram.

Embodiment

A kind of portable data acquisition terminal embodiment, referring to Fig. 1 and Fig. 2, described terminal includes a single-chip microcomputer 1, and what be connected with single-chip microcomputer is that 4X4 keyboard 2, LCD 3, rfid card card reader 4 and wireless data are narrated module 5, and single-chip microcomputer also is provided with a serial type interface 6; Wherein, described single-chip microcomputer is the ARM7 series monolithic, and wireless data transmission module is that model is the device of " Zigbee CC1100 ".Model is for the device of " Zigbee CC1100 " meets the frequency standard, it has communication distance more than 300 meters, multiple modulation system is arranged, have that abundant channel is available, antijamming capability strong, possess frequency hopping function, possess requirement such as carrier sense function, consider cost factor again, and the problem of the each side such as purchase complexity of device, " Zigbee CC1100 " device is a kind of proper selection.Described rfid card card reader comprises MFRC500 series circuit, this circuit has comprised a control circuit chip 7 and signal emission receiving chip 8, this circuit adopts the controlled frequency of 13.56MHz, in order to cut down the consumption of energy, use powered battery so that adapt to, thereby reach the purpose of " portable ", the MFRC500 circuit has connected an asymmetrical emission of radio frequency signals, Acquisition Circuit, described asymmetrical emission of radio frequency signals, Acquisition Circuit is by inductance L, capacitor C 1, C2, C3, C4, C5, resistance R 1, R2 and induction chip 9 are formed, the transmitting terminal TX of described inductance one termination MFRC500 circuit, an another termination capacitor C 1 of inductance and the end of C2, the other end ground connection of capacitor C 1, an another termination capacitor C 3 of capacitor C 2 and the end of C4, other end connecting resistance R1 one end of capacitor C 3, the receiving end RX of another termination MFRC500 circuit of resistance R 1, another a termination capacitor C 5 of capacitor C 4 and an end of resistance R 2, the other end ground connection of capacitor C 5, another termination induction chip of resistance R 2.

The inductance value of described inductance is 33mH, and the electric capacity of capacitor C 1 is 68P, and the electric capacity of described capacitor C 2 to C5 is 33P, and the resistance value of described resistance R 1 is 830 ohm, and the resistance value of described resistance R 2 is 1000 ohm.

Claims

1. portable data acquisition terminal includes a single-chip microcomputer, and what be connected with single-chip microcomputer is 4X4 keyboard, LCD, rfid card card reader and wireless data transmission module; It is characterized in that described single-chip microcomputer is the ARM7 series monolithic, described wireless data transmission module is that model is the device of " Zigbee CC1100 ".

2. portable data acquisition terminal according to claim 1, it is characterized in that, described rfid card card reader comprises MFRC500 series circuit, the MFRC500 circuit has connected an asymmetrical emission of radio frequency signals, Acquisition Circuit, described asymmetrical emission of radio frequency signals, Acquisition Circuit is by inductance, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5, resistance R 1, resistance R 2 and induction chip are formed, the transmitting terminal TX of described inductance one termination MFRC500 circuit, an another termination capacitor C 1 of inductance and an end of capacitor C 2, the other end ground connection of capacitor C 1, an another termination capacitor C 3 of capacitor C 2 and an end of capacitor C 4, other end connecting resistance R1 one end of capacitor C 3, the receiving end RX of another termination MFRC500 circuit of resistance R 1, an another termination capacitor C 5 of capacitor C 4 and an end of resistance R 2, the other end ground connection of capacitor C 5, another termination induction chip of resistance R 2.

3. portable data acquisition terminal according to claim 2, it is characterized in that, the inductance value of described inductance is 33mH, the electric capacity of capacitor C 1 is 68P, described capacitor C 2 to the electric capacity of capacitor C 5 is 33P, the resistance value of described resistance R 1 is 830 ohm, and the resistance value of described resistance R 2 is 1000 ohm.