Intelligent tracing electronic scale
Technical field
This utility model intelligent tracing electronic scale belongs to meat, fresh, the edible use of fruit and vegerable, various household supplies
Product are weighed and are concluded the business and measurement instrument field.
Background technology
In recent years, China's food safety affair happens occasionally, and has caused consumers in general's
Generally worry and the extensive concern of various circles of society.Each province and city, each ministries and commissions, each manufacturing enterprise are being supported
Grow, plant, produce, circulate, the link such as sale sets up food and agricultural product quality and safety is reviewed
System.Intelligent tracing electronic scale becomes key one ring that the circulation of meat dish is reviewed in system, intelligence
Review electronic scale collection to weigh, show, network, real-name authentication, E-Payment, pass on Gong in data
Can in one terminal unit, by docking with technology of Internet of things, can realize food information typing,
Transmission, record food security information, Transaction Information, and send electronic transaction information to consumer
Trace to the source voucher with print quality, by this card consumer can pass through inquiry terminal machine, the Internet,
Mobile phone short messages, inquires about oneself bought food quality the most qualified, can be widely applied to business
Super, the market of farm produce, fruit and vegerable market, seafood marine industry.
Summary of the invention
The purpose of this utility model is to avoid the deficiencies in the prior art, and provides a kind of circuit knot
Structure is simple, stable performance, have weighing, show, network, real-name authentication, E-Payment,
The intelligent tracing electronic scale of data upload function one.
The purpose of this utility model is reached by following measures, and intelligent tracing electronic scale is
By CPU processor circuit, pressure transducer A/D convertor circuit, WIFI module circuit, RFID
Radio frequency identification module interface, thermal printer interface, keyboard interface, LCD show interface, USB
Interface, RJ45 network interface, RS232 interface composition, power circuit provide the burning voltage needed,
Collect the weight of testee by pressure transducer and be converted to the signal of telecommunication, then via
A/d converter is converted into digital signal and is input in CPU processor process, CPU processor
After process, digital signal is transported on LCD display show measurement result, thermal printer
Being connected with the serial ports of CPU processor by interface, CPU processor is by controlling thermal printer
Print transaction information, CPU processor is entered with server end by RJ45 network interface or WIFI module
Row communication carries out uploading transaction data and downloading merchandise news, and keyboard control module is connect by keyboard
Mouth is connected with CPU processor GPIO foot and receives Keyboard Control information, RFID RF identification mould
Block is connected with the serial ports of CPU processor by interface, and CPU processor is receiving RF identification
Signal is uploaded onto the server end, USB interface and RS232 by RJ45 network interface or WIFI module
Interface can carry out Peripheral extension.
CPU processor circuit of the present utility model is by CPU processor, protection circuit, SDRAM
Circuit, FLASH program storing circuit, crystal oscillating circuit, crystal oscillating circuit connects CPU processor,
Produce impulse waveform accurately and make the orderly work of program, FLASH to be supplied to CPU processor
Program storing circuit connects CPU processor, and CPU processor calls FLASH program storage electricity
Program in road makes system start working according to the requirement of program, at CPU in SDRAM circuit
Reason device can export a signal allows CPU processor quit work to open protection circuit.
Pressure transducer A/D convertor circuit is to be inserted by AD conversion integrated package, resistance capacitance, interface
Seat composition, pressure transducer A/D convertor circuit connects CPU processor, pressure transducer collection
To the weight of testee and be converted to the signal of telecommunication and be connected with AD conversion integrated package by interface
Connect.Function of weighing of the present utility model passes through in CPU processor after system electrification is stable
Put system program and call function and AD conversion integrated package communicates, be placed on pressure when there being object
After on force transducer, pressure transducer collects the weight of testee and is converted to analog telecommunications
Number being transported on AD conversion integrated package, then AD conversion integrated package is converted into digital signal handle
Digital signal is transported to CPU processor, and CPU processor is by defeated after built-in system routine processes
Deliver to LCD display show, be transported to thermal printer and carry out print transaction information, defeated
Deliver to WIFI module or RJ45 network interface is uploaded onto the server end.
WIFI module circuit is made up of WIFI integrated package, resistance capacitance, and WIFI module exports
Signal be input in CPU processor communicate with server end.Of the present utility model wireless
Communication function is by the built-in system routine call of CPU processor after system electrification is stable
Function is that the integrated package of wireless communication function carries out initialization program, and user can pass through management field
Face selects and arranges wireless communication function, to facilitate intelligent tracing electronic scale to carry out with server end
Communication.
RFID radio frequency identification module interface is to be protected integrated package by resistance capacitance, ESD, and interface is inserted
Seat composition, RFID radio frequency identification module is connected with the serial ports of CPU processor by interface socket.
Real-name authentication function of the present utility model passes through CPU processor after system electrification is stable
Built-in system routine call function and RFID video identification module communicate, and penetrate when there being RFID
Frequently, time in card is in antenna range, RFID video identification module just arrives the information conveyance received
CPU processor, CPU processor passes through RJ45 receiving after information in radio frequency processes
Network interface or WIFI module end of uploading onto the server is identified and stores.
Thermal printer interface is made up of resistance capacitance, ESD protection integrated package, interface socket,
Thermal printer is connected with the serial ports of CPU processor by interface.Of the present utility model printing is handed over
Easily informational function is to be adjusted by the built-in system program of CPU processor after system electrification is stable
Communicating with function and thermal printer, CPU processor is by controlling thermal-sensitive printer printing
Transaction Information.
Keyboard interface is made up of integrated package, resistance capacitance, interface socket, keyboard control module
Send push button signalling by keyboard interface and output a signal to CPU process again to shaping integrated package
Device.Keypress function of the present utility model passes through in CPU processor after system electrification is stable
Put system program and call function and keyboard control module communicates, the keyboard when there being button to press
Control module conveying push button signalling, to shaping integrated package, is transported to after push button signalling is carried out shaping
CPU processor, CPU processor performs corresponding dynamic after being processed by built-in system program
Make.
LCD display interface is made up of resistance capacitance, interface socket.LCD of the present utility model
Display function is by the built-in system routine call of CPU processor after system electrification is stable
Function and LCD display module communicate, and CPU processor is by after built-in system routine processes
The information needing display is sent in LCD display module control LCD by interface socket show
Display screen shows information.
USB interface is to be protected integrated package, resistance capacitance, USB-A by power management integrated package, ESD
Type socket forms, and power management integrated package supports that USB device prevents power supply from falling when warm swap
Falling, can well power for USB device, be also equipped with overcurrent protection function, ESD protects collection
In bulk prevents electrostatic from damaging CPU processor by transmission line.USB interface of the present utility model electricity
Road is to call a function to realize management, because of CPU by the system program that CPU processor is built-in
Processor is integrated with the function of USB interface, supports USB2.0 communication protocol.CPU processor
Built-in system program can manage all ancillary equipment meeting USB communication protocol.Such as USB
Mouse, USB keyboard, USB hard disk, USB rfid interrogator.
RJ45 network interface is made up of PHY layer integrated package, resistance capacitance, net mouth transformer socket,
CPU processor calls function transfer to PHY layer integrated package through system program, is then communicated to net
On mouth transformer outlet, realize the mutual of data.RJ45 network interface of the present utility model is logical
Cross CPU and process built-in system program realization management, because CPU processor is integrated with RJ45
The function of network interface, it is possible to achieve meet the communication function of ICP/IP protocol.CPU processor
Network interface pin is connected on external physical layer integrated package, is then realized electrically by net mouth transformer
Isolation, is transferred to after preventing electromagnetic interference on RJ45 network interface realize and external equipment interactive information.
RS232 interface includes integrated package, resistance capacitance, audion, and socket forms, at CPU
Reason device calls function transfer to integrated package through system program, then is transferred to insert by integrated package
Seat, realizes the mutual of data, and audion can well protect CPU processor from electrostatic
Damage.RS232 serial ports of the present utility model is to be come by the system program that CPU processor is built-in
Realize management.On CPU processor, UART foot transmits the information on RS232 integrated package real
It is transferred on socket just to realize and meet after now meeting the voltage signal of RS232 communication
The equipment of RS232 communication protocol realizes communication.
This utility model each functional circuit simple in construction, stable performance, install and observe conveniently,
Use high-performance ARM9 architecture processor, powerful linux operating system, collection weigh,
Display, networking, real-name authentication, E-Payment, data upload function in one terminal unit,
Can be widely applied to that business is super, the market of farm produce, fruit and vegerable market, seafood marine industry.
Accompanying drawing explanation
Accompanying drawing 1 is intelligent tracing electronic scale block architecture diagram schematic diagram.
Accompanying drawing 2 is CPU processor circuit theory schematic diagram.
Accompanying drawing 3 is pressure transducer A/D convertor circuit principle schematic.
Accompanying drawing 4 is WIFI module circuit theory schematic diagram.
Accompanying drawing 5 be RFID radio frequency identification module interface, thermal printer interface, keyboard interface,
LCD display interface circuit principle schematic.
Accompanying drawing 6 is usb circuit principle schematic.
Accompanying drawing 7 is RJ45 network port circuit principle schematic.
Accompanying drawing 8 is RS232 interface circuit principle schematic.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, this utility model is by being by CPU processor circuit, pressure
Sensors A D change-over circuit, WIFI module circuit, RFID radio frequency identification module interface, temperature-sensitive
Printer interface, keyboard interface, LCD show interface, USB interface, RJ45 network interface, RS232
Interface composition, power circuit provide the stable electricity needed.This utility model is applied to that business is super, agriculture
Trade market, fruit and vegerable market, seafood marine industry, connect 220V alternating current and turn on the power switch
Stable voltage the most just can be provided.Intelligent tracing electronic scale powers on after stablizing by CPU process
It is that AD conversion integrated package, LCD display, temperature-sensitive are beaten that the built-in system program of device calls function
Print machine, keyboard, WIFI module, RJ45 network interface integrated package, USB interface integrated package, RS232
Integrated package initializes program, and weight analog electrical signal starts after being input to integrated package according to configuration journey
Sequence work also shows, at LCD display, the information of starting purchasing seasonal commodities, by keyboard configuration intelligent tracing electricity
Son claims with the functional requirement meeting user.When placing articles on the scale pan of intelligent tracing electronic scale
Time, by the pressure transducer in intelligent tracing electronic scale, weight is converted to analog electrical signal defeated
Delivering on AD conversion integrated package, then AD conversion integrated package is converted into digital signal and numeral
Signal is transported to CPU processor, and CPU processor is transported to by after built-in system routine processes
LCD display shows, is transported to thermal printer and carries out print transaction information, is transported to
WIFI module or RJ45 network interface are uploaded onto the server end.The signal of WIFI module output passes through
Socket is input in CPU processor, by the built-in system routine call function of CPU processor
Integrated package for wireless communication function carries out initialization program, and user can be selected by administration interface
Select and wireless communication function is set, thus can communicate with server end.RFID penetrates
Frequently identification module is connected with the serial ports of CPU processor, by CPU process by interface socket
Built-in system routine call function and the RFID video identification module of device communicate, when having
When RFID radio-frequency card is in antenna range, RFID video identification module is just the information received
Being transported to CPU processor, CPU processor is logical receiving after information in radio frequency processes
Cross RJ45 network interface or WIFI module end of uploading onto the server is identified and stores.Thermal printing
Machine is connected with the serial ports of CPU processor, by the built-in system of CPU processor by interface
Routine call function and thermal printer communicate, and CPU processor is by controlling thermal printing
Machine print transaction information.Keyboard control module sends push button signalling to shaping collection by keyboard interface
In bulk outputs a signal to CPU processor again, is adjusted by the built-in system program of CPU processor
Communicate with function and keyboard control module, the keyboard control module conveying when there being button to press
Push button signalling, to shaping integrated package, is transported to CPU processor after push button signalling is carried out shaping,
CPU processor performs corresponding action by built-in system program after being processed.LCD shows
Interface is led to by built-in system routine call function and the LCD display module of CPU processor
Letter, CPU processor is by passing through interface the information needing display after built-in system routine processes
Socket is sent in LCD display module control LCD display to show information.USB interface
Circuit is to call a function to realize management by the system program that CPU processor is built-in, because of
CPU processor is integrated with the function of USB interface, supports USB2.0 communication protocol.RJ45 net
Mouthful call function transfer to PHY layer integrated package by CPU processor through system program, then pass
It is passed on net mouth transformer socket, realizes the mutual of data.RS232 interface by CPU at
Reason device calls function transfer to integrated package through system program, then is transferred to insert by integrated package
Seat, realizes the mutual of data, and audion can well protect CPU processor from electrostatic
Damage.
As shown in Figure 2, CPU processor circuit of the present utility model is by CPU integrated package
U1 (S3C2440), protection integrated package U9 (MAX811), SDRAM integrated package U6
And U7 (HY57V561620BT), NAND FLASH integrated package U2 (HY57V561620BT)
(K9F1208), NOR FLASH integrated package U10 (SST39VF1601), crystal oscillator X2, resistance
Electric capacity forms.Protection integrated package mainly has a voltage monitoring, program fleet, hand-reset function,
Protection system worked well can well be played.SDRAM integrated package is mainly for system program
Program and data are deposited performing when.FLASH integrated package mainly provides storage for system
Program and the function of data.Crystal oscillator can be CPU provide high-precision pulse, allow CPU according to
Certain sequential working.
As shown in Figure 3, pressure transducer A/D convertor circuit of the present utility model is by CPU
Processor U1 (S3C2440), AD conversion integrated package U26 (ADS1232), resistance capacitance,
Interface socket J4 forms.Pressure transducer collects the weight of testee and is converted to telecommunications
Number it is transferred to AD conversion integrated package U26 by interface socket J4.Lead to after system electrification is stable
The built-in system routine call function crossing CPU processor initializes AD conversion integrated package U26.
Then AD conversion integrated package U26 conversion digital signal is transported to CPU processor and processes.
As shown in Figure 4, WIFI module circuit of the present utility model is by CPU processor U1
(S3C2440), integrated package U19 (SKW17), resistance capacitance composition.When system electrification is stable
Integrated package U19 is initialized afterwards by CPU processor U1.Then by CPU processor U1
The system program put calls function makes integrated package U19 be operated according to system program.
As shown in Figure 5, this utility model RFID radio frequency identification module interface circuit is by CPU
Processor U1 (S3C2440), electrostatic protection integrated package U21 (PLR0502), interface socket
CON2, resistance capacitance form.Thermal printer interface circuit is by CPU processor
U1 (S3C2440), electrostatic protection integrated package U22 (PLR0502), interface socket CON3, electricity
Resistance electric capacity composition.Keyboard interface circuit is by CPU processor U1 (S3C2440), integrated package U23
(74LVC4245APW), terminal fitting CON4, resistance capacitance composition.LCD display interface electricity
Route CPU processor U1 (S3C2440), terminal fitting J2, resistance capacitance composition.RFID
Radio frequency identification module interface socket is connected on TXD1 and the RXD1 pin of CPU processor U1,
Electrostatic protection integrated package U21 can protect CPU processor from the damage of electrostatic high-pressure, when being
System powers on after stablizing and is initialized by CPU processor U1 calling system program and managed.
Thermal printer interface socket is connected on TXD2 and the RXD2 pin of CPU processor U1, quiet
Electric protection integrated package U22 can protect CPU processor from the damage of electrostatic high-pressure, works as system
Power on and initialize by CPU processor U1 calling system program and manage after stablizing.Key
Dish interface socket J2 receives on integrated package U23 pin, and integrated package U23 receives the GPIO of CPU
On pin, at the beginning of being carried out by CPU processor U1 calling system program after system electrification is stable
Beginningization also manages.CPU processor U1 is integrated with LCD and shows interface function, works as system electrification
Initialize LCD display by CPU processor U1 after Wen Ding, then pass through CPU processor
System program built-in for U1 calls function makes LCD display show information.
As shown in Figure 6, usb circuit of the present utility model is by CPU processor
U1 (S3C2440), power management integrated package U24 (MIC2505), ESD protection is integrated
U25 (PLR0502), resistance capacitance, USB-A type socket J3 form.CPU processor U1 collection
Having become the function of USB interface, these functions are come by system program built-in for CPU processor U1
Complete management.
As shown in Figure 7, RJ45 network port circuit of the present utility model is by integrated package U18
(DM9000), RJ45 socket J4, resistance capacitance composition.By CPU processor built-in be
System program management network port so that it is communication meets ICP/IP protocol.CPU processor U1 is integrated with
Network interface, the signal of U1 output is after the data that integrated package U18 conversion meets ICP/IP protocol
Signal is transferred to RJ45 network interface socket J4 and is integrated with net mouth transformer, net mouth transformer rise isolation,
Prevent the function of electromagnetic interference, realize logical through RJ45 network interface socket J4 and the outside network equipment
Letter.
As shown in Figure 8, RS232 circuit of the present utility model is by integrated package 17
(MAX3232), audion, resistance capacitance, socket COMO composition.RS232 circuit is logical
Cross the built-in system program management UART foot of CPU processor U1, the signal of UART foot output
Through integrated package U17 be converted into meet RS232 communication signal after right to realize through socket COMO
Outer communication.