CN201181502Y - Tax controlled cashing and weighing machine - Google Patents

Tax controlled cashing and weighing machine Download PDF

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Publication number
CN201181502Y
CN201181502Y CNU2008200556417U CN200820055641U CN201181502Y CN 201181502 Y CN201181502 Y CN 201181502Y CN U2008200556417 U CNU2008200556417 U CN U2008200556417U CN 200820055641 U CN200820055641 U CN 200820055641U CN 201181502 Y CN201181502 Y CN 201181502Y
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circuit
chip
tax
port
keyboard
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CNU2008200556417U
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Chinese (zh)
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刘志勇
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Individual
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Abstract

The utility model relates to a tax-controlled cash weighing machine, which comprises a box body, a scale pan and a keyboard, a nixie tube display screen and a cashbox which are respectively disposed on the case body, as well as an tax controller, a scan gun and a printer which are externally connected, a microprocessor control unit and a data storage circuit which are disposed in the case body, as well as a weighing A/D conversion circuit, a keyboard driving circuit, a nixie tube display control circuit, a cashbox, a communication interface circuit, a precise real-time clock and a parameter storage power supply reset circuit, a power supply and a charging circuit which are respectively connected with the microprocessor control unit and the data storage circuit. The communication interface circuit is respectively connected with the tax controller, the scan gun and the printer. The power supply and the charging circuit are connected with each circuit. The keyboard driving circuit and the nixie tube display control circuit are respectively connected with the keyboard and the nixie tube display screen. The microprocessor control unit and the data storage circuit control the circuits to read the information, calculate the storage tax and deal, print bill receipts and display the stored data. The machine facilitates the tax payment and improves the national tax revenue.

Description

Tax control cash register weigher
Technical field
The utility model relates to a kind of cash register weigher, is specifically related to a kind of tax control cash register weigher.
Background technology
At present, a kind of prior art mechanical type weighing weighing apparatus is applied to the weight that retail shop claims commodity, and this weighing weighing apparatus is to claim that with quilt thing is placed on the pan of a steelyard, by the indication of the pointer on panel weight, realizes weighing up the weight that is claimed thing.The total price of commodity can not be remembered heavily, be calculated to this mechanical type weighing weighing apparatus automatically owing to can only weigh up the weight that is claimed thing, and therefore, it is very inconvenient to use.
Another kind of prior art projection electronic weighing weighing apparatus is extensive use of in retail shop, and this projection electronic weighing weighing apparatus circuit is made up of weighing sensor A, analog to digital converter B, microprocessor C, charactron display E, keyboard D; The input end of weighing sensor A links to each other with the weighing parts, the output terminal of weighing sensor A is connected with the input end of analog to digital converter B, the output terminal of analog to digital converter B is connected with the input end of microprocessor C, and microprocessor C is connected with the input end of charactron display E and the output terminal of keyboard D respectively.When using, basic parameters such as keyboard D input unit price, claimed the weight signal of article to be converted to voltage signal (simulating signal) input analog-to-digital converter B through weighing sensor A, be converted to digital signal input microprocessor C through analog to digital converter B, microprocessor C sends to charactron display E with the weight digital signal and shows after treatment.Microprocessor C scan round keyboard has judged whether that button presses, and carries out different processing according to different buttons.
The shortcoming of this projection electronic weighing weighing apparatus is:
1. prior art projection electronic weighing weighing apparatus is because operation keyboard is simpler, the charactron display only is set, can only be to weight, the unit price input of commodity, can only show current weight, unit price in real time, calculate, show total price, function singleness, in process of exchange, weigh, during cash register, can not simultaneously the tax of tax revenue be calculated storage.In wholesaler trade, be easy to generate tax scams, national tax revenue is levied Lou less levy.
2. the control flow of the projection electronic weighing weighing apparatus of prior art just fixedly installs when dispatching from the factory, and the user is non-programmable, therefore, can not the bulk information in the shiploads of merchandise transaction be carried out in the message tube, has limited projection electronic weighing weighing apparatus expandable functions greatly.
Prior art also have a kind of in the supermarket widely used POS electronic cash register, this electronic cash register is by the bar code of electron scanning input commodity, move processing after, show the extensive stock total price, and go out the single client of giving of cash register by printer prints.This POS electronic cash register is collected money by the information of input bar code, does not have the function that calculating stores with tax of weighing, in commodity transaction or wholesaler trade field, can not weigh and tax calculating storage, function is more single, causes the tax scams incident to take place easily, makes the state tax revenue loss.
Summary of the invention
The purpose of this utility model provides a kind of tax control cash register weigher, and the high precision performance that it has quick sampling, high-speed computation and weighs can satisfy the requirement of Weighing; And possess cash register, tax and calculate the various functions that store, print client's document invoice; The user can program voluntarily, can preserve data and information management automatically to the bulk information in the commodity transaction, especially automatic store transaction logs is printed client's document invoice information in tax-controlling card in commodity transaction, greatly made things convenient for taxpayer's payment of duty, and can prevent that artificial tax scams incident from taking place, thereby improve the tax efficiency of country.
The purpose of the utility model tax control cash register weigher is achieved through the following technical solutions: a kind of tax control cash register weigher, comprise: casing, be arranged on the pan of a steelyard at casing top, be arranged on the keyboard in casing front, be separately positioned on the digitron display screen of casing front and back, be arranged on the just basifacial cash box of casing, be arranged on the scanner in the casing outside, printer, be arranged on microprocessor control unit and data storage circuitry in the casing, the analog to digital conversion circuit of weighing that is connected with microprocessor control unit and data storage circuitry by spi bus, the keyboard drive circuit that is connected with microprocessor control unit and data storage circuitry by universal serial bus respectively, the charactron display control circuit, the control end of described microprocessor control unit and data storage circuitry is connected with the control end of cash box; Be characterized in, also comprise a The Design of Tax Controled Device, communication interface circuit, accurate real-time clock and parameter storage power reset circuit, power supply and charging circuit;
Described The Design of Tax Controled Device is arranged on the casing outside, and The Design of Tax Controled Device is connected with the communication interface circuit, and the communication interface circuit is connected with microprocessor control unit and data storage circuitry by universal serial bus;
Described communication interface circuit is connected with scanner, printer respectively, microprocessor control unit and data storage circuitry gated sweep rifle, The Design of Tax Controled Device, printer, and bar code information, the calculating storage tax that reads commodity respectively concluded the business, printed tickets;
Described accurate real-time clock and parameter storage power reset circuit pass through I 2The C bus is connected with microprocessor control unit and data storage circuitry, and accurate real-time time is provided, stored password, and CONTROLLED POTENTIAL resets;
Described power supply and charging circuit are connected with each functional circuit, and the non-stop run power supply is provided;
Described keyboard drive circuit, charactron display control circuit are connected with keyboard, digitron display screen by data bus respectively.
Above-mentioned tax control cash register weigher, wherein, described microprocessor control unit and data storage circuitry are made up of STM32 microcontroller chip, data flash chip, crystal oscillating circuit, filtering circuit, warning circuit; The STM32 microcontroller chip is connected with the data flash chip by spi bus, be connected a filtering circuit between the port one 3 of STM32 microcontroller chip and the ground, the port 26 of STM32 microcontroller chip connects a warning circuit, is connected a crystal oscillating circuit between the port 5 of STM32 microcontroller chip and the port 6.
Above-mentioned tax control cash register weigher, wherein, described The Design of Tax Controled Device adopts the SKC10 The Design of Tax Controled Device, tax-controlling card, subscriber card and tax administration card that this The Design of Tax Controled Device is provided with the IC read write line and matches with the IC read write line; The Design of Tax Controled Device is connected with the communication interface circuit, and this communication interface circuit adopts the RS-232 transponder chip; The signal end of The Design of Tax Controled Device is connected with the receiving and transmitting signal end of RS-232 transponder chip, and the RS-232 transponder chip sends signal wire by RXD received signal line with TXD and is connected with the STM32 microcontroller chip.
Above-mentioned tax control cash register weigher, wherein, the signal end of described printer is connected with the receiving and transmitting signal end of RS-232 transponder chip; The signal end of described scanner is connected with the receiving and transmitting signal end of RS-232 transponder chip; The RS-232 transponder chip sends signal wire by RXD received signal line with TXD and is connected with the STM32 microcontroller chip.
Above-mentioned tax control cash register weigher, wherein, described keyboard is by commodity key [numbering 01 to 30], numerical key [0-9], weigh key [zero setting], [peeling], sell cash register key [cancellation], [clearing], [cashier], [salesman], [tax], [unit price], [category], [PLU], [going out gold], [going into gold], [return of goods], [discount], [printing], function key [setting], [affirmation], [performing], [removing], [on turn over], [time turn over], [deletion] composition.
Above-mentioned tax control cash register weigher, wherein, described keyboard drive circuit adopts CH452 keyboard drive chip, the SDA data terminal of CH452 keyboard drive chip and SCL clock end respectively by universal serial bus and STM32 microcontroller chip each corresponding end is corresponding is connected, a plurality of drive ends of CH452 keyboard drive chip and a plurality of sections drive ends are held corresponding the connection with everybody end and the section of keyboard respectively; Microprocessor control unit and data storage circuitry read the button value data by universal serial bus and CH452 keyboard drive chip.
Above-mentioned tax control cash register weigher, wherein, described digitron display screen control circuit adopts TM1629A charactron display control chip, corresponding end is corresponding is connected by each of serial interface bus and STM32 microcontroller chip respectively for the DIO data-signal end of TM1629A charactron display control chip and CLK clock signal terminal and STB chip selection signal end, and 8 section drive ends of digitron display screen control chip and 16 position output terminals are connected with output terminal is corresponding each Duan Duan of digitron display screen and position respectively.
Above-mentioned tax control cash register weigher, wherein, the described analog to digital conversion circuit of weighing is made up of LOAD CELLS, modulus conversion chip, crystal oscillating circuit, filtering circuit; The port one of LOAD CELLS, port 2 respectively with port one 0, the port 9 corresponding connections of modulus conversion chip, the port 3 of LOAD CELLS, port 4 respectively with the corresponding connection of two input ends of filtering circuit, the AVIN0 output terminal of filtering circuit, AVIN1 output terminal respectively with port 7, the port 8 corresponding connections of modulus conversion chip, modulus conversion chip is connected with the STM32 microcontroller chip by the SPI universal serial bus, is connected with crystal oscillating circuit between the port 2 of modulus conversion chip and the port 3.
Above-mentioned tax control cash register weigher, wherein, described accurate real-time clock and power reset circuit are made up of accurate real time clock circuit and power reset circuit; This accurate real time clock circuit is made up of clock chip, the crystal oscillating circuit that is connected clock chip port one, port 2, the battery circuit that is connected clock chip port 8; Power reset circuit comprises reset switch and power reset chip; Reset switch one end is connected with the port one of power reset chip, and the port 5 of power reset chip, port 6 are connected with port 5, the port 6 of clock chip respectively.
Above-mentioned tax control cash register weigher, wherein, described power supply and charging circuit are made up of voltage conversion circuit, mu balanced circuit, charging circuit and comparator circuit; The input end of voltage conversion circuit is connected with the 220V alternating current, and its output terminal is connected with mu balanced circuit, charging circuit respectively, and the positive and negative two ends of charging circuit are connected with comparator circuit by resistance respectively.
The utility model tax control cash register weigher makes it compared with prior art owing to adopted above-mentioned technical scheme, has following advantage and good effect:
1. the utility model is owing to be provided with The Design of Tax Controled Device and the interface circuit that can collect taxes, can not only weigh, cash register, printing client document, and possess the gold transaction of collecting taxes and calculate the various functions that store; The user can program voluntarily, can preserve data and information management automatically to the bulk information in the commodity transaction, especially in the batch commodity transaction, calculate tax take simultaneously, be stored in the tax card, greatly made things convenient for taxpayer's payment of duty, and can prevent that artificial tax scams incident from taking place, thereby improve the tax efficiency of country.
2. the utility model is owing to be provided with powerful microprocessor control unit and data storage circuitry, and the user can program voluntarily, and the energy automatic data collection is preserved various data, prints client's document.
3. the utility model is owing to be provided with special-purpose software control procedure, send print signal by microprocessor control unit and data storage circuitry control after, open cash box more automatically, thereby the graft and embezzlement incident that can prevent business personnel takes place.
4. the utility model can show and be printed on the various information in the operation and management owing to disposed digitron display screen and printer interface.
5. the utility model is owing to be provided with accurate real-time clock and parameter storage power reset circuit passes through I 2The C bus is connected with microprocessor control unit and data storage circuitry, can provide the accurate time on date to system, prints in transaction and the storage current time.
6. the utility model can charge automatically owing to be furnished with high capacity rechargeable battery and charging circuit, for each functional circuit provides the non-stop run power supply, can be fit to outdoor no external power source work.
Description of drawings
Fig. 1 is the circuit block diagram of prior art electronic scales.
Fig. 2 is the surface structure synoptic diagram of the utility model tax control cash register weigher.
Fig. 3 is the circuit block diagram of the utility model tax control cash register weigher.
Fig. 4 is the microprocessor control unit and the data storage circuitry schematic diagram of the utility model tax control cash register weigher.
Fig. 5 is the analog to digital conversion circuit schematic diagram of weighing of the utility model tax control cash register weigher.
Fig. 6 is the communication interface circuit theory diagrams of the utility model tax control cash register weigher.
Fig. 7 is the accurate real-time clock and the parameter storage power reset circuit schematic diagram of the utility model tax control cash register weigher.
Fig. 8 is the power supply and the charging circuit schematic diagram of the utility model tax control cash register weigher.
Embodiment
See also shown in the accompanying drawing 2, tax control cash register weigher comprises: casing 1, be arranged on the casing top weighing dish 2, be arranged on the casing front keyboard 4, be separately positioned on the casing front and back digitron display screen 3, be arranged on the just basifacial cash box 7 of casing, be arranged on printer 5, The Design of Tax Controled Device 6, the scanner 8 in the casing outside.The model of digitron display screen 3 is SMG16H25BRD, and the model of keyboard 4 is KEY64BRD, and the model of printer 5 is PP2X POSPRT, and the model of The Design of Tax Controled Device 6 is SKC10, and the model of cash box 7 is CR4X00, and the model of scanner 8 is CIPHERLAB1200.
The digitron display screen 3 that is arranged on the casing front is to operate demonstration to the salesman to watch, the digitron display screen 3 of box back surface (on figure, not indicating), be that the salesman is shown to client when operating and watches, also be provided with power plug wire 16 at box back surface, these power plug wire 16 1 ends are electrically connected with the city, the other end is connected with power circuit 15 in being arranged on casing 1, and this power circuit is connected with each functional circuit, and working power is provided.
See also shown in the accompanying drawing 3, be arranged on casing 1 interior microprocessor control unit and data storage circuitry 9 in addition, the control end of microprocessor control unit and data storage circuitry 9 is connected with the control end of cash box 7; Microprocessor control unit and data storage circuitry 9 are connected with the analog to digital conversion circuit 10 of weighing by spi bus, and this analog to digital conversion circuit 10 of weighing comprises LOAD CELLS 104, connects the modulus conversion chip 101 of LOAD CELLS 104; Microprocessor control unit and data storage circuitry 9 are connected with communication interface 11 by universal serial bus, communication interface circuit 11 is connected with printer 5, The Design of Tax Controled Device 6, scanner 8 respectively, microprocessor control unit and data storage circuitry 9 gated sweep rifles 8, The Design of Tax Controled Device 6, respectively read commodity bar code information, calculate tax, show transaction content, printer 5 printed tickets at digitron display screen 3; Microprocessor control unit and data storage circuitry 9 pass through I 2The C bus is connected with accurate real-time clock and parameter storage power reset circuit 12, and accurately real-time clock and parameter storage power reset circuit 12 provide accurate real-time time, stored password, and CONTROLLED POTENTIAL resets; Microprocessor control unit and data storage circuitry 9 are connected with keyboard drive circuit 15, charactron display control circuit 14 by universal serial bus respectively, and keyboard drive circuit 15, charactron display control circuit 14 are connected with keyboard 4, digitron display screen 3 by data bus respectively.Power supply and charging circuit 13 are connected with each functional circuit, and the non-stop run power supply is provided.
Keyboard is by commodity key [numbering 01 to 30], numerical key [0-9], weigh key [zero setting], [peeling], sell cash register key [cancellation], [clearing], [cashier], [salesman], [tax], [unit price], [category], [PLU], [going out gold], [going into gold], [return of goods], [discount], [printing], function key [setting], [affirmation], [performing], [removing], [on turn over], [time turn over], [deletion] composition.
Please cooperate referring to shown in Figure 4, the keyboard drive circuit, adopt CH452 keyboard drive chip 15, keyboard adopts 8 * 8 matrixes, 64 buttons, the SDA data terminal of CH452 keyboard drive chip 15, SCL clock end, INT look-at-me end are respectively by pin 9, pin 10, the pin 8 corresponding connections of universal serial bus with the microcontroller 91 of microprocessor control unit and data storage circuitry 9, and a plurality of drive ends of CH452 keyboard drive chip 15 are held corresponding the connection with the every end and the section of keyboard 4 respectively with a plurality of sections drive ends; Microprocessor control unit and data storage circuitry 9 read the button value data by universal serial bus and CH452 keyboard drive chip.
Digitron display screen control circuit 14, adopt TM1629A charactron display control chip, digitron display screen adopts 16, STB sheet choosing end, CLK clock end and the DIO data terminal that the TM1629A charactron shows control core 14 be the pin 11 of the microcontroller 91 by universal serial bus and microprocessor control unit and data storage circuitry 9 respectively, pin 24, pin 25 is corresponding to be connected, and 8 section drive ends of digitron display screen control chip and 16 position output terminals are respectively with each Duan Duan of digitron display screen with output terminal is corresponding is connected.
See also shown in Figure 4ly, microprocessor control unit and data storage circuitry 9 are made up of microcontroller 91, data flash chip 92, crystal oscillating circuit 93, filtering circuit 94, warning circuit 95; It is STM32F101RB that microcontroller 91 adopts STM32 microcontroller chip model, and the model of data flash chip 92 is AT45DB321B-TC-2.5, and crystal oscillating circuit 93 adopts existing 8MHZ crystal resonator.
The pin 61 of microcontroller 91, pin 62., pin 33, pin 34, pin 35., pin 36 respectively with pin 1, pin 3, pin 11, pin 12, pin 14, the pin 13 corresponding connections of data flash chip 92.
Crystal oscillating circuit 93 by crystal resonator U105, be attempted by the resistance R 101 at crystal resonator U105 two ends, the capacitor C 102, the C103 that connect crystal resonator U105 two ends respectively constitute.Crystal resonator U105 two ends are connected with pin 5, the pin 6 of microcontroller 91 respectively.
Filtering circuit 94 is made of inductance L 101, the capacitor C 101, the C106 that are connected to inductance L 101 two ends, inductance L 101 and capacitor C 101 and connect end and be connected the negativing ending grounding of capacitor C 101, C106 with the pin 13 of microcontroller 91.
Warning circuit 95 is attempted by the capacitor C 107 at buzzer U106 two ends, resistance R 103 formations of connection buzzer U106 one end by buzzer U106, and resistance R 103 other ends are connected with the pin 26 of microcontroller 91.
Microcontroller 91 has up to 45DMips 1.25DMips/MHz, the ARM Cortex-M3 of monocycle hardware multiplication and division owing to adopt the STM32 Series of MCU TMCore cpu is high performance 32 RISC core A RM processor; Built-in flash memories up to the 128K byte is used to the program of depositing and data; Embedded 4 to 16MHz high speed crystal oscillators have clock, reset and the power supply management function, and the selection of system clock is to carry out when starting, and the RC oscillator of inner 8MHz is chosen as the cpu clock of acquiescence when resetting; Have 7 passage dma controllers, the peripheral hardware of support: timer, ADC, SPI synchronous serial interface, I 2Smart card), 7 communication interfaces, 1 12 analog to digital converter, the quick I/O IO interface of 80 multi-function double-way 5V compatibilities nearly C bus and USART interface (provide:; It provides the number of pins of platform, reduction, the system power dissipation of reduction cheaply for the needs of realizing the MCU microcontroller, and remarkable calculated performance and advanced interrupt system response and hand-reset input are provided simultaneously.Therefore, microcontroller 91 is powerful and advanced, thereby not only has the function of electronic scales, and possesses the various functions of the utility model tax control cash register weigher; The user can program voluntarily, can preserve data and information management automatically to the bulk information in the commodity transaction, especially calculates tax take in the batch commodity transaction simultaneously, is stored in the tax card, has greatly made things convenient for taxpayer's payment of duty.
See also shown in Figure 5ly, the analog to digital conversion circuit 10 of weighing is made up of LOAD CELLS 104, modulus conversion chip 101, crystal oscillating circuit 102, filtering circuit 103.Wherein the model of LOAD CELLS 104 is SENSOR, and the model of modulus conversion chip 101 is CS1180, and modulus conversion chip 101 is 20 high precision, low-power consumption Sigma-Delta modulus conversion chip, and effective resolution can reach 19.Can under 2.7V～5.5V supply voltage condition, work, 1～128 times of programmable gain amplifier that provides, in the time of 128 times, the CS1180 effective resolution can reach 18bit.Modulator is a second order Sigma-Delta modulator, and the FIR wave filter of chip provides 50Hz and 60Hz notch filter, effectively improves the interference free performance of machine.
The pin 12 of modulus conversion chip 101, pin 13, pin 14, pin 11, pin 15, the SDI serial incoming line by in the spi bus, SDO serial output line, SCK clock line, CS chip select line, INT look-at-me line are distinguished corresponding connections with pin 23, pin 22, pin 21, pin 20, the pin 41 of microcontroller 91.Modulus is according to connecting resistance R804 between the pin 15 of conversion chip 101 and the pin 16.
Crystal oscillating circuit 102 by crystal resonator Y801, be connected the capacitor C 801 at crystal resonator Y801 two ends, C802 constitutes, two of crystal resonator Y801 disconnectedly is connected with pin 2, the pin 3 of modulus conversion chip 101 respectively.
Filtering circuit 103 is made up of capacitor C 807, C808, C809, resistance R 801, R805; Capacitor C 807, C808, the C809 connection of contacting, one end of resistance R 801 is connected the series side of capacitor C 807 and capacitor C 808, one end of resistance R 05 is connected the series side of capacitor C 808 and capacitor C 809, the other end of resistance R 801, R805 respectively with the port 4 of LOAD CELLS 104,3 corresponding connections of port.The AVIN1 of filtering circuit, AVIN0 output terminal respectively with port 8, the port 7 corresponding connections of modulus conversion chip 101.
The end 1 of LOAD CELLS 104, port 2 respectively with pin 10, the pin 9 corresponding connections of modulus conversion chip 101.The input end of LOAD CELLS 104 is connected with the positive direct-current power supply, output terminal just has the signal output of a millivolt level, its semaphore is one-to-one relationship with extraneous weight of adding up, weight signal is converted to voltage signal (simulating signal) through LOAD CELLS 104, and then imports analog to digital conversion circuit 101 into; Analog to digital conversion circuit 101 adopts high precision delta sigma analog to digital converter, is claimed weight signal input microcontroller 91 after analog to digital converter 101 amplifies conversion of thing, because analog to digital converter 101 possesses high precision and high stability, can satisfy the requirement of Weighing; And possess arithmetic speed and sample rate far above general weight display, can satisfy the requirement of High-speed Control.
CS1180 modulus conversion chip 101 needs external reference voltage, and analog reference voltage is connected on REFP and the REFN pin, in the present embodiment, on the REFP of modulus conversion chip 101 pin with the REFN pin on external reference voltage be 3V.
CS1180 modulus conversion chip 101 external oscillators, from the MCLK pin two of CS1180 modulus conversion chip input main clock pulse, circuit requirement connects the electric capacity of 10～20pF simultaneously on the MCLK of CS1180 modulus conversion chip 101 and XTAL pin.
S1180 modulus conversion chip 101 carries out communication by the microcontroller 91 of spi bus and outside, can only be used for from pattern.Bus interface is four line spi bus of standard, comprises CS, SCLK, SDI and SDO.Wherein:
Chip selection signal CS, before carrying out communication with CS1180, controller outside must be sent the CS chip selection signal earlier.Between whole communication period, the CS signal is maintained low.After the CS signal uprised, whole spi bus can be reset.
Serial clock SCLK, SCLK is a schmidt trigger, is used for SDI and SDO data input signal are sampled.In order to prevent wrong sampled data, if all do not have the SCLK clock to occur in the cycle, come temporarily at next SCLK so at 3 data standby ready signal DRDY, spi bus will be reset, and then begin next communication cycle.
Data inputs SDI and data output SDO, SDI and SDO pin are used for the input and output data respectively.When not using, SDO is a high-impedance state, drives it by a two-way bus then with regard to allowing SDI and SDO be connected together like this.
See also shown in Figure 6ly, in Fig. 6, comprise the Interface Terminal J605 of the Interface Terminal J604 of Interface Terminal J602, the J603 of The Design of Tax Controled Device 6 and interface circuit 111, printer 5 and scanner 8 and communication interface circuit 112, cash box driving circuit 113, level shifting circuit 114.
The Design of Tax Controled Device 6 adopts commercially available SKC10 The Design of Tax Controled Device 6, tax-controlling card 61, subscriber card and tax administration card that this The Design of Tax Controled Device is provided with the IC read write line and matches with the IC read write line, and The Design of Tax Controled Device 6 is connected with microcontroller 91 by communication interface circuit 111.Communication interface circuit 111 adopts the RS232 communication interface chip.The port 4 of the Interface Terminal J602 of The Design of Tax Controled Device 6 connects the 5V DC voltage.The port 2 of the Interface Terminal J603 of The Design of Tax Controled Device 6, port 3 are connected with port one 3, the port one 1 of RS32 communication interface chip 111 respectively; RS232 is by the port one 2 of interface 111, port one 4 sends signal wire and microcontroller 91 respectively by RXD received signal line and TXD port 43,42 corresponding connections of port.In the figure, TAX-TX1 is control signal and the data that the serial of generic asynchronous serial bus UART1 sends a signal to The Design of Tax Controled Device SKC10, and TAX_RX1 is that the serial received signal of generic asynchronous serial bus UART1 receives the instruction and data that The Design of Tax Controled Device sends.
The port one of RS232 communication interface 111, port 3 are connected with the positive and negative terminal of capacitor C 612 respectively.The port 4 of RS232 communication interface 111, port 5 are connected with the positive and negative terminal of capacitor C 610 respectively.Be connected with the negative anode of capacitor C 605 respectively between the port 6 of RS232 communication interface 111 and the ground, be connected with the positive and negative terminal of capacitor C 607 respectively between the port 2 of RS232 communication interface 111 and the VCC.A plurality of ports of communication interface 111 connect electric capacity, are the undesired signal process capacitor filterings for producing in communication, make transmission signals more reliable.
The CPU running frequency of The Design of Tax Controled Device 6 is 14.7MHZ, has the data-carrier store of 128MBIT, and data can keep IC-card read write line more than 10 years; With the IC-card read write line is matching used the tax card arranged, each one on subscriber card and tax administration card.When commodity transaction is used, the various tax volume small amount ticket taxes that tax control cash register steelyard machine will be calculated, value added tax, by RS232 communication interface circuit 111 input tax control machines 6, tax control machine stores various taxes in the tax administration card, thereby the phenomenon of can avoiding evading taxes takes place, and improves the state tax revenue income.
Printer 5, scanner 8 are connected with microcontroller 91 by communication interface circuit 112 respectively.Communication interface circuit 112 adopts the RS232 communication interface chip, and the port one 2 of RS-232 transponder chip 112, port one 1, port 9, port one 0 are by RXD received signal line and port one 7, port one 6, port 30, port 29 difference corresponding are connected of TXD transmission signal wire with microcontroller 91; The port one 3 of RS232 communication interface chip 12, port one 4 respectively with port 2, the port 3 corresponding connections of the Interface Terminal J604 of printer 5, the port 8 of RS232 communication interface, port 2, mouthful end 3 corresponding connections of port 7 and the Interface Terminal J605 of scanner.
In the figure, PRN_TX2 and PRN_RX2 are transmission and the received signals of generic asynchronous serial bus UART2, control external printer 5 printed tickets.CCD-TX3 and CCD_RX3 are the transmission of generic asynchronous serial bus UART3 and the barcode data information that received signal receives scanner scanning, transfer dependent merchandise information.
Cash box driving circuit 113 is connected with microcontroller 91.Cash box driving circuit 113 is by driving tube Q601, and metal-oxide-semiconductor Q602, cash box interface J601, resistance R 601, R602, R603, R604 form.Resistance R 601, R602's and connect the end be connected with the base stage of driving tube Q601, the base stage of driving tube Q601 be connected with the pin 27 of microcontroller 91 by resistance R 601, driving tube is series resistor R604 between the base stage of the collector of Q601 and metal-oxide-semiconductor Q602, series resistor R603 between metal-oxide-semiconductor Q602 collector and the 10V direct supply, metal-oxide-semiconductor Q602 collector is connected with the port 2 of cash box interface J601, and the port one of cash box interface J601 is connected with the 10V direct supply.Cash box adopts the HS400B2S cash box of opening by pulse control, and microcontroller 91 sends drive pulse signal CASH-BOX to cash box driving circuit 113, and the control cash box is opened.
Level shifting circuit 114 is made up of voltage stabilizing chip U601, capacitor C 601, C602, C603, C608; The model of voltage stabilizing chip U601 is LM1117MP-5.0, between the port 3 of voltage stabilizing chip U601 and the GND and meet capacitor C 601, C602, between the port 2 of voltage stabilizing chip U601 and the GND and meet capacitor C 603, C608, the port one of voltage stabilizing chip U601 is connected with GND, the port 2 of voltage stabilizing chip U601.The port 2 of voltage stabilizing chip U601 is connected with port 4, and is connected with the port 4 of the Interface Terminal J602 of The Design of Tax Controled Device 6, offers outside The Design of Tax Controled Device 5V direct supply.The port 3 of voltage stabilizing chip U601 is connected with the V6 anode of the accumulator B902 of charging circuit 133, by the port 2 output 5V direct supplys of voltage stabilizing chip U601.
See also shown in Figure 7ly, accurately real-time clock and power reset circuit 12 are made up of with power reset circuit 122 accurate real time clock circuit 121; Accurately real time clock circuit 121 by clock chip U701, be connected clock chip U701 port one, port 2 crystal resonator Y701, be connected crystal resonator Y701 one end capacitor C 701, be connected diode D701, the lithium battery BT701 that the polyphone of clock chip U701 port 8 connects and form.The model of clock chip U701 is PT7C4363WEX, and the model of lithium battery BT701 is SAFT14250.Accurately the function of real time clock circuit 121 is to provide the accurate time on date to system, prints in transaction and the storage current time.
Power reset circuit 122 comprises reset switch J701, power reset chip U702, resistance R 701 to R705, capacitor C 702; Power reset chip U702 adopts CAT1025 power reset chip, reset switch J701 one end is connected with the port one of power reset chip U702, the port 5 of power reset chip U702, port 6 respectively with the port 5 of clock chip, port 6 connects, the port one of power reset chip U702, port 3 and VCC, difference series resistor R701 between the GND, R702, the port 2 of power reset chip U702, port 6, series resistor R703 between port 5 and the power supply VCC, R704, R705, the port 6 of power reset chip U702, the pin 58 of port 5 and microcontroller 91, pin 59 connects.CAT1025 is based on the complete solution of the storer and the Power Supply Monitoring of micro controller system.They utilize the Low-Power CMOS technology that the Serial E EPOM of 2K position is integrated in the chip piece with the system power supply supervisory circuit that is used for power down protection.CAT1025 comprises 1 accurate Vcc monitoring slowdown monitoring circuit and 2 and opens with Louing and export: RESET and RESET.CAT1025 also comprises a write-protect input (WP).If WP connects high level, then write operation is under an embargo.The power supply supervisory circuit of CAT1025 and reset circuit can prevent the generation of power loss condition at system's protected storage of upper and lower when electricity and system's microcontroller.CAT1025 adopts the threshold voltage that resets of 3.3V system, if system power supply goes beyond the scope, reset signal is effective, forbids the operation of system's microcontroller.In the 200ms after supply voltage exceeds threshold voltage, reset signal is still remained valid.High level effectively becomes very simple with the effective reset enable signal CAT1025 of low level with microcontroller and being connected of other IC device.In addition, independently resetting input pin MR can be as the input that resets of manual button.The serial EEPROM of 2K position constitutes the page or leaf of 16 bytes in the CAT1025 sheet.In addition, the Vcc voltage monitoring circuit provides the hardware data defencive function, prevent Vcc drop to be lower than reset threshold voltage or before Vcc rises to the threshold voltage that resets when powering on to the write operation of storer.
See also shown in Figure 8ly, power supply and charging circuit 13 are made up of voltage conversion circuit 131, secondary mu balanced circuit 132, charging circuit 133, comparator circuit 134; The input end of voltage conversion circuit 131 is connected with the 220V alternating current, and its output terminal is connected with secondary mu balanced circuit 132, charging circuit 133 respectively, and the positive and negative two ends of charging circuit are connected with comparator circuit 134 by resistance respectively.
Voltage conversion circuit 131 is made up of transformer BYQ901, commutator tube D906, D907, D908, D909, capacitor C 906, voltage stabilizing chip U903; The model of transformer BYQ901 is BYQ220-9AC, the model of voltage stabilizing chip U903 is LM7808, the input end of transformer BYQ901 is connected with the 220V alternating current, two output terminals of transformer BYQ901 are connected with the anode of commutator tube D907, D908 respectively, the port one of the negative terminal of commutator tube D907, D908 and capacitor C 906 1 ends, voltage stabilizing chip U903 also connects, the port 2 of voltage stabilizing chip U903 is with anode, the GND of capacitor C 906 other ends, commutator tube D906, D909 and connect the port 3 output 8V DC voltage of voltage stabilizing chip U903.Voltage conversion circuit 131 is by 220V alternating current input, through transformer BYQ901 transformation, become DC voltage through commutator tube, again through voltage stabilizing chip U903 voltage stabilizing output 8V DC voltage.
Secondary mu balanced circuit 132 is made up of voltage stabilizing chip U904, capacitor C 907, C908, C909, C910, inductance L 903, L904; The model of voltage stabilizing chip U904 is LM1117MP-3.3, between the port 3 of voltage stabilizing chip U904 and the GND and meet capacitor C 907, C908, between the port 2 of voltage stabilizing chip U904 and the GND and meet capacitor C 909, C910, the port 2 of voltage stabilizing chip U904 and an end of VCC and inductance L 903 also connect, one end of the port one of voltage stabilizing chip U904 and GND and inductance L 904 also connects, and carries out High frequency filter by inductance L 903, L904.Secondary mu balanced circuit 132 is exported 3.3V after the secondary voltage stabilizing, other end AVDD, AGND by inductance L 903, L904 are connected with port one 0, the port 9 of modulus conversion chip 101, LOAD CELLS 104, the modulus conversion chip 101 that offers the analog to digital conversion circuit 10 of the weighing power supply of working.
Charging circuit 133 is made up of accumulator B902, diode D910, resistance R 909, R910, R912, the positive and negative terminal of diode D910 is connected with the port 3 of voltage stabilizing chip U903, an end of resistance R 9012 respectively, one end of the anode of the other end of resistance R 912 and accumulator 902, resistance R 909 also connects, and the negative terminal of accumulator 902 and resistance R 910, GND also connect.The anode of accumulator 902 is exported positive 6V DC voltage, and the anode of accumulator 902 is connected with the port 3 of voltage stabilizing chip U904, and the anode of accumulator 902 also is connected with the port one of voltage stabilizing chip U601 of level shifting circuit 114 among Fig. 6.In start was used, constantly to accumulator B902 charging, when the dispatch from foreign news agency outage, accumulator B902 can provide uninterrupted power supply in limited time by charging circuit 133.
Comparator circuit 134 is made up of comparer U905, resistance R 907, R908, R911; Another of the port 5 of comparer U905 and resistance R 909, R910 also connects end and is connected, the port 6 of comparer U905 and resistance R 908, R911's and connect to hold and be connected, and the other end of resistance R 911, R908 is connected with VCC, GND respectively.Comparer U905 port 7 be connected with an end of resistance R 907, comparer U905 port 7 be connected with buzzer U106.When the battery capacity of accumulator 902 was not enough, by comparator circuit 134,91 control buzzer U106 sent warning by microcontroller.
The circuit theory of the utility model tax control cash register weigher is, when the weight signal that is claimed thing amplifies through analog to digital converter, carry out digital signal input microprocessor control module and data storage circuitry that the AD analog to digital conversion obtains, microprocessor control unit and data storage circuitry calculate gravimetric value by linear relationship, meanwhile, multiply by acquisition amount of money value mutually according to the corresponding unit price of instruction calls of keyboard input and with gravimetric value, subsequently with gravimetric value, the value of information that keyboard calls, storages such as the amount of money are got up, by communication interface control The Design of Tax Controled Device tax is calculated and is stored on the tax card, show every data by digitron display screen, by communication interface by the various documents of printer output, and only after pressing printing key, single chip machine controlling circuit sends the unlatching control signal to cash box, and cash box is just opened, and puts into gathering.Microprocessor control unit and data storage circuitry send the barcode data information that CCD-TX3 and reception CCD_RX3 and signal receive scanner scanning by the universal serial bus transmission, transfer dependent merchandise information.
Tax control cash register weigher provides the correct current time, in print procedure, also can call current date and time, and can be according to exchange hour date checking posting and thing consistent.Accurately real-time clock and memory circuit have power-off protection function; can be used for the data that every needs outage such as store various kinds of data, Transaction Information print What, report messages management is preserved; add lithium battery SAFT14250 and can guarantee that the real-time clock function in outage works on, the time of guaranteeing is accurate.
Tax control cash register weigher is according to the control program of working out in advance, but user's direct control keyboard is used for sale and operation control, uses very convenient.The using method of tax control cash register weigher is as follows:
When this machine of use, at first carry out default: initialization electronic scale, merchandise news setting, the setting of bill organization, salesman's setting, system time setting, weight are demarcated calibration, password setting etc.
Then, can sell operation.For example:
Start, input cashier numbering and password correctly enter system, the system log (SYSLOG) salesman, whether machine self-verifying external unit such as printer The Design of Tax Controled Device connect, and whether tax-controlling card is plugged, and the external unit inspection is by entering the business state:
Sell food (mode of weighing):
By salesman's key input salesman numbering, access the merchandise news that system prestores (as the unit price name of an article etc.) by article number or by scanner items scanning bar code;
Put into food on pan of a steelyard, weigh, show weight, simultaneity factor calculates total price according to unit price;
Press acknowledgement key, to confirm that this transaction and the transaction of storage current time are in The Design of Tax Controled Device and machine system;
Sell cigarette (the non-mode of weighing):
Access the merchandise news (as price name of an article etc.) that system prestores by article number or by scanner items scanning bar code; The transaction of system's storage current time goes out total price in The Design of Tax Controled Device and machine system and according to automatic cumulative calculation;
Different commodity clearing by settling accounts key, show the accumulative total amount payable, and the input actual money calculates and the demonstration small change amount of money, prints the bill invoice and gives the client;
Automatically open cash box simultaneously, put into gathering.
Tax control cash register weigher uses very easy, can also the various data in the business activities be gathered, and is convenient to operator's management.
In sum, the utility model is owing to be provided with suitable dedicated operations keyboard on complete machine, and be equipped with special-purpose control program, possess that the user cipher of being applicable to operation, bar code merchandise control are sold, weighed, cash register, transaction storage, information time statistics, print client's document invoice, print the form of concluding the business, various feature operations such as the taxpayer initiatively pays taxes; Can preserve data and information management automatically to the bulk information in the commodity transaction, improved the efficiency of management of enterprise greatly, improve the performance of enterprises, especially various Transaction Informations are stored in the tax-controlling card simultaneously in commodity transaction, greatly made things convenient for taxpayer's payment of duty, and can be able to prevent that artificial tax scams incident from taking place, thereby improve the tax efficiency of country.

Claims (10)

1. tax control cash register weigher, comprise: casing, be arranged on the pan of a steelyard at casing top, be arranged on the keyboard in casing front, be separately positioned on the digitron display screen of casing front and back, be arranged on the just basifacial cash box of casing, be arranged on the scanner in the casing outside, printer, be arranged on microprocessor control unit and data storage circuitry in the casing, the analog to digital conversion circuit of weighing that is connected with microprocessor control unit and data storage circuitry by spi bus, the keyboard drive circuit that is connected with microprocessor control unit and data storage circuitry by universal serial bus respectively, the charactron display control circuit, the control end of described microprocessor control unit and data storage circuitry is connected with the control end of cash box; It is characterized in that: also comprise a The Design of Tax Controled Device, communication interface circuit, accurate real-time clock and parameter storage power reset circuit, power supply and charging circuit;
Described The Design of Tax Controled Device is arranged on the casing outside, and The Design of Tax Controled Device is connected with the communication interface circuit, and the communication interface circuit is connected with microprocessor control unit and data storage circuitry by universal serial bus;
Described communication interface circuit is connected with scanner, printer respectively, microprocessor control unit and data storage circuitry gated sweep rifle, Tax control device, printer, and bar code information, the calculating storage tax that reads commodity respectively concluded the business, printed tickets;
Described accurate real-time clock and parameter storage power reset circuit pass through I 2The C bus is connected with microprocessor control unit and data storage circuitry, and accurate real-time time is provided, stored password, and CONTROLLED POTENTIAL resets;
Described power supply and charging circuit are connected with each functional circuit, and the non-stop run power supply is provided;
Described keyboard drive circuit, charactron display control circuit are connected with keyboard, digitron display screen by data bus respectively.
2, tax control cash register weigher according to claim 1, it is characterized in that: described microprocessor control unit and data storage circuitry are made up of STM32 microcontroller chip, data flash chip, crystal oscillating circuit, filtering circuit, warning circuit; The STM32 microcontroller chip is connected with the data flash chip by spi bus, be connected a filtering circuit between the port one 3 of STM32 microcontroller chip and the ground, the port 26 of STM32 microcontroller chip connects a warning circuit, is connected a crystal oscillating circuit between the port 5 of STM32 microcontroller chip and the port 6.
3, tax control cash register weigher according to claim 1 is characterized in that: described The Design of Tax Controled Device adopts the SKC10 The Design of Tax Controled Device, tax-controlling card, subscriber card and tax administration card that this The Design of Tax Controled Device is provided with the IC read write line and matches with the IC read write line; The Design of Tax Controled Device is connected with the communication interface circuit, and this communication interface circuit adopts the RS-232 transponder chip; The signal end of The Design of Tax Controled Device is connected with the receiving and transmitting signal end of RS-232 transponder chip, and the RS-232 transponder chip sends signal wire by RXD received signal line with TXD and is connected with the STM32 microcontroller chip.
4. tax control cash register weigher according to claim 1 is characterized in that: the signal end of described printer is connected with the receiving and transmitting signal end of RS-232 transponder chip; The signal end of described scanner is connected with the receiving and transmitting signal end of RS-232 transponder chip; The RS-232 transponder chip sends signal wire by RXD received signal line with TXD and is connected with the STM32 microcontroller chip.
5. tax control cash register weigher according to claim 1, it is characterized in that: described keyboard is by commodity key " numbering 01 to 30 ", numerical key " 0-9 ", weigh key " zero setting ", " peeling ", sell cash register key " cancellation ", " clearing ", " cashier ", " salesman ", " tax ", " unit price ", " category ", " PLU ", " going out gold ", " going into gold ", " return of goods ", " discount ", " printing ", function key " setting ", " affirmation ", " performing ", " removing ", " on turn over ", " time turn over ", " deletion " composition.
6. tax control cash register weigher according to claim 1, it is characterized in that: described keyboard drive circuit adopts CH452 keyboard drive chip, the SDA data terminal of CH452 keyboard drive chip and SCL clock end respectively by universal serial bus and STM32 microcontroller chip each corresponding end is corresponding is connected, a plurality of drive ends of CH452 keyboard drive chip and a plurality of sections drive ends are held corresponding the connection with everybody end and the section of keyboard respectively; Microprocessor control unit and data storage circuitry read the button value data by universal serial bus and CH452 keyboard drive chip.
7. tax control cash register weigher according to claim 1, it is characterized in that: described digitron display screen control circuit adopts TM1629A charactron display control chip, corresponding end is corresponding is connected by each of serial interface bus and STM32 microcontroller chip respectively for the DIO data-signal end of TM1629A charactron display control chip and CLK clock signal terminal and STB chip selection signal end, and 8 section drive ends of digitron display screen control chip and 16 position output terminals are connected with output terminal is corresponding each Duan Duan of digitron display screen and position respectively.
8, tax control cash register weigher according to claim 1 is characterized in that: the described analog to digital conversion circuit of weighing is made up of LOAD CELLS, modulus conversion chip, crystal oscillating circuit, filtering circuit; The port one of LOAD CELLS, port 2 respectively with port one 0, the port 9 corresponding connections of modulus conversion chip, the port 3 of LOAD CELLS, port 4 respectively with the corresponding connection of two input ends of filtering circuit, the AVIN0 output terminal of filtering circuit, AVIN1 output terminal respectively with port 7, the port 8 corresponding connections of modulus conversion chip, modulus conversion chip is connected with the STM32 microcontroller chip by the SPI universal serial bus, is connected with crystal oscillating circuit between the port 2 of modulus conversion chip and the port 3.
9, tax control cash register weigher according to claim 1, it is characterized in that: described accurate real-time clock and power reset circuit are made up of accurate real time clock circuit and power reset circuit; This accurate real time clock circuit is made up of clock chip, the crystal oscillating circuit that is connected clock chip port one, port 2, the battery circuit that is connected clock chip port 8; Power reset circuit comprises reset switch and power reset chip; Reset switch one end is connected with the port one of power reset chip, and the port 5 of power reset chip, port 6 are connected with port 5, the port 6 of clock chip respectively.
10, tax control cash register weigher according to claim 1, it is characterized in that: described power supply and charging circuit are made up of voltage conversion circuit, mu balanced circuit, charging circuit and comparator circuit; The input end of voltage conversion circuit is connected with the 220V alternating current, and its output terminal is connected with mu balanced circuit, charging circuit respectively, and the positive and negative two ends of charging circuit are connected with comparator circuit by resistance respectively.
CNU2008200556417U 2008-02-22 2008-02-22 Tax controlled cashing and weighing machine Expired - Fee Related CN201181502Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200556417U CN201181502Y (en) 2008-02-22 2008-02-22 Tax controlled cashing and weighing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101777232B (en) * 2009-09-23 2011-10-26 北京拓盛电子科技有限公司 Electronic scale tax monitoring system and method
CN102542701A (en) * 2012-02-14 2012-07-04 浪潮齐鲁软件产业有限公司 Tax control billing machine with electronic balance function
CN102706422A (en) * 2012-01-09 2012-10-03 台衡精密测控(昆山)股份有限公司 Antitheft alarm electronic scale
CN103234613A (en) * 2013-04-27 2013-08-07 刘铁 Cashier scale working method and cashier scale
CN103424173A (en) * 2013-07-12 2013-12-04 深圳市福田区青少年科技教育协会 Quick weighing machine
CN106644015A (en) * 2016-11-02 2017-05-10 南京工程学院 Electronic scale capable of avoiding small changes
CN108760006A (en) * 2018-04-08 2018-11-06 广州市海升信息科技有限责任公司 A kind of Multifunctional electronic scale
CN109238410A (en) * 2018-09-06 2019-01-18 芜湖职业技术学院 A kind of high-precision electronic weighing device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101777232B (en) * 2009-09-23 2011-10-26 北京拓盛电子科技有限公司 Electronic scale tax monitoring system and method
CN102706422A (en) * 2012-01-09 2012-10-03 台衡精密测控(昆山)股份有限公司 Antitheft alarm electronic scale
CN102542701A (en) * 2012-02-14 2012-07-04 浪潮齐鲁软件产业有限公司 Tax control billing machine with electronic balance function
CN103234613A (en) * 2013-04-27 2013-08-07 刘铁 Cashier scale working method and cashier scale
CN103424173A (en) * 2013-07-12 2013-12-04 深圳市福田区青少年科技教育协会 Quick weighing machine
CN103424173B (en) * 2013-07-12 2016-02-10 深圳市福田区青少年科技教育协会 A kind of rapid weighing device
CN106644015A (en) * 2016-11-02 2017-05-10 南京工程学院 Electronic scale capable of avoiding small changes
CN108760006A (en) * 2018-04-08 2018-11-06 广州市海升信息科技有限责任公司 A kind of Multifunctional electronic scale
CN109238410A (en) * 2018-09-06 2019-01-18 芜湖职业技术学院 A kind of high-precision electronic weighing device

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