CN203929198U - A kind of electronic scales of rapid payment - Google Patents

Abstract

The utility model discloses a kind of electronic scales of rapid payment, specifically comprise microcontroller chip, show module, LOAD CELLS, radio frequency chip circuit chip, match circuit, crystal oscillating circuit and power supply unit; Described microcontroller chip carries out data interaction by SPI serial line interface and radio frequency chip circuit chip, its RX_IN1 and RX_IN2 are as the input signal end of radio frequency chip circuit chip, TX_OUT is as the output signal end of radio frequency chip circuit chip, described match circuit adopts RC circuit to realize, and pin ANT1 and ANT2 are as external antennal interface; Described crystal oscillating circuit is connected with radio frequency chip circuit; Described microcontroller chip is connected with showing module, LOAD CELLS by I2C bus; Described power supply unit is for being provided to microcontroller chip and radio frequency chip circuit chip by voltage.The utility model, by the inner integrated NFC payment unit of electronic scales, makes electronic scales can realize rapid payment in the environment of near field.

Description

A kind of electronic scales of rapid payment

Technical field

The utility model belongs to computation weigh technical field, is specifically related to a kind of design that can realize the electronic scales of rapid payment in weighing.

Background technology

The infiltration of the mid-50 electronic technology has promoted the manufacturing development of weighing apparatus, since there is dynamo-electric convolution electronic scale in the initial stage sixties, through more than 40 years update with perfect, China's electronic scale developed into present full-electronic type and digital intelligent from initial mechanical-electrical combination type.The technical equipment of China's electronic scale and detection research technique reach the level of international the mid-90 substantially, and electronics weighing technology also develops to dynamic weighing from static weighing: metering method develops to digital measurement from analogue measurement; Measuring characteristic is measured to measuring multiple parameters development, the particularly research to rapid weighing and dynamic weighing and application from one-parameter.

Near-field communication (Near Field Communication, NFC) be a kind of radiotelegraphy of short distance high frequency, in 13.56MHz frequency runs on 20 cm distance, its transmission speed has three kinds of 106Kbit/ second, 212Kbit/ second or 424Kbit/ seconds.Near-field communication is by becoming ISO/IEC IS 18092 international standards, EMCA-340 standard and ETSI TS 102 190 standards at present, NFC adopts initiatively and passive two kinds of read modes, and NFC equipment refers to the equipment with near field communication (NFC) function in the prior art.

Electronic scales is a kind of electronic scale, and the valuation field that is used for weighing, if NFC technology and electronic scales are combined, can produce a lot of new function and applications, as E-Payment, information inquiry, advertisement pushing etc., is conducive to improve information-based integrated level.Under prior art condition, realize the function that can carry out NFC communication in the valuation of weighing, need to buy respectively the plurality of devices such as the valuation equipment of weighing (electronic scales), NFC equipment (NFC reader) and computer with communication interface, and in prior art, also there is not the electronic scales that can realize rapid payment, cause user to complete after weighing at commodity, also need to settle accounts the overall process that just can complete commodity purchasing to other clearing department, bring certain inconvenience to buyer, also brought certain repeated labor.

Utility model content

Technical problem to be solved in the utility model is do not have the shortcoming of NFC function and propose a kind of electronic scales of rapid payment for electronic scales in prior art.

The technical scheme that the utility model solves its technical matters employing is: a kind of electronic scales of rapid payment, comprises microcontroller chip, shows module, LOAD CELLS, radio frequency chip circuit chip, match circuit, crystal oscillating circuit and power supply unit; Described microcontroller chip carries out data interaction by SPI serial line interface and radio frequency chip circuit chip, its pin RX_IN1 and RX_IN2 are as the input signal end of radio frequency chip circuit chip, pin TX_OUT is as the output signal end of radio frequency chip circuit chip, described match circuit adopts RC circuit to realize, and pin ANT1 and ANT2 are as external antennal interface; Described crystal oscillating circuit is connected with radio frequency chip circuit; Described microcontroller chip is connected with showing module, LOAD CELLS by I2C bus; It is that 3.3V voltage is provided to microcontroller chip and radio frequency chip circuit chip by 5V voltage transitions that described power supply unit is used for.

The beneficial effects of the utility model: a kind of electronic scales based on NFC rapid payment of the utility model, by the inner integrated NFC payment unit of electronic scales, makes electronic scales can realize rapid payment in the environment of near field; NFC technology combines with electronic scales, for realizing communicating by letter between terminal device with NFC function or NFC electronic tag, can the multiple application scheme such as obtain for identity and recognition of devices, E-Payment, advertisement pushing, device-dependent message, and the electronic scales after integrated have volume small and exquisite, read distant, highly sensitive, fault-tolerance strong, identify the features such as accurate, in real life application, applicability is stronger.

Brief description of the drawings

Fig. 1 is the circuit structure block diagram of a kind of electronic scales based on NFC rapid payment of the utility model embodiment;

Fig. 2 is the circuit diagram of LOAD CELLS in a kind of electronic scales based on NFC rapid payment of the utility model embodiment;

Fig. 3 is the circuit diagram that shows module in a kind of electronic scales based on NFC rapid payment of the utility model embodiment;

Fig. 4 is the circuit diagram of microcontroller chip in a kind of electronic scales based on NFC rapid payment of the utility model embodiment;

Fig. 5 is the circuit diagram of power supply unit in a kind of electronic scales based on NFC rapid payment of the utility model embodiment;

Fig. 6 is the schematic diagram of crystal oscillating circuit in a kind of electronic scales based on NFC rapid payment of the utility model embodiment;

Fig. 7 is the schematic diagram of match circuit in a kind of electronic scales based on NFC rapid payment of the utility model embodiment;

Fig. 8 is the schematic diagram of radio frequency chip circuit in a kind of electronic scales based on NFC rapid payment of the utility model embodiment.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is further described.

Be illustrated in figure 1 the circuit structure block diagram of a kind of electronic scales based on NFC rapid payment of the utility model embodiment, comprise microcontroller chip, show module, LOAD CELLS, radio frequency chip circuit chip, match circuit, crystal oscillating circuit and power supply unit;

Described microcontroller chip carries out data interaction by SPI serial line interface and radio frequency chip circuit chip, its pin RX_IN1 and RX_IN2 are as the input signal end of radio frequency chip circuit chip, pin TX_OUT is as the output signal end of radio frequency chip circuit chip, described match circuit adopts RC circuit to realize, and pin ANT1 and ANT2 are as external antennal interface; Described crystal oscillating circuit is connected with radio frequency chip circuit; Described microcontroller chip is connected with showing module, LOAD CELLS by I2C bus; It is that 3.3V voltage is provided to microcontroller chip and radio frequency chip circuit chip by 5V voltage transitions that described power supply unit is used for.

The utility model passes through in the inner integrated NFC payment unit of electronic scales, existing electronic scales can be realized and after tested article complete weighing, get final product price expense corresponding to rapid payment, fill up the blank that does not have the electronic scales of rapid payment in prior art, solve user can not directly realize direct payment after buying commodity and finishing problem in the place that completes commodity weighing, promote user's buying experience, and can in existing market, realize fairly large application.For those skilled in the art can understand and implement technical solutions of the utility model, below in conjunction with concrete circuit structure, the utility model scheme is elaborated:

Wherein, the microcontroller chip of described weighing unit adopts LPC1768 to realize, LOAD CELLS adopts chip HX710 to realize, and display driver and display adopt CS5817 display module to realize, and the radio frequency chip circuit of described NFC payment unit adopts chip TRF7970A to realize;

According to the circuit structure shown in Fig. 1, wherein, microcontroller chip LPC1768 carries out data interaction by SPI serial line interface and radio frequency chip circuit chip TRF7970A, its pin RX_IN1 and RX_IN2 are as the input signal end of radio frequency chip circuit chip, pin TX_OUT is as the output signal end of radio frequency chip circuit chip, described match circuit adopts RC circuit to realize, and pin ANT1 and ANT2 are as external antennal interface; Described crystal oscillating circuit is connected with radio frequency chip circuit, and the clock that it provides adopts 13.56MHz; Described microcontroller chip LPC1768 is connected with CS5817 display module, LOAD CELLS chip HX710 by I2C bus; Power supply unit is that 3.3V voltage is provided to microcontroller chip LPC1768 and radio frequency chip circuit chip TRF7970A by 5V voltage transitions, and it adopts the low voltage difference LDO linear voltage stabilization chip of ASM1117 to realize.Particular circuit configurations schematic diagram below by each components and parts is elaborated to the utility model:

Be illustrated in figure 2 the circuit diagram of LOAD CELLS, U2 is LOAD CELLS HX710 chip, 1 pin connects 3.3V voltage as with reference to voltage, 7 pin and 8 pin connect 3.3V voltage through C9, C10 filtering respectively, 3 pin and 4 pin access respectively simulating signal anode and the negative terminal of sensor, and 5 pin are clock signal SCL, and 6 pin are data-signal SDO, be connected with microcontroller chip with 6 pin by 5 pin, realize the weight data of the tested article that collect is transferred to microcontroller chip.

Be illustrated in figure 3 the circuit diagram that shows module, U23 chip wherein, CS5817 is the chief component that shows module, it is a digital pipe driving chip, for the demonstration of charactron.25 pin connect 3.3V voltage to chip power supply, 11 pin ground connection, the SCL clock signal that 9 pin are I2C, 10 pin are the SDA data-signal of I2C, are connected with 10 pin by 9 pin with microcontroller chip, receive idsplay order, all the other pins are charactron control pin, control the demonstration of each charactron.

Be illustrated in figure 4 the circuit diagram of microcontroller chip, wherein cpu chip, be U5 select be the LPC1768 chip of NXP company, LPC1768 chip is the processor of ARM framework, and dominant frequency is up to 100Mhz, and the effect of this microcontroller chip is receive the weight information of LOAD CELLS transmission and process, in association after the information such as commodity and price, preserve, or transfer to demonstration module, the weight of display of commodity and pricing information.

Be illustrated in figure 5 the circuit diagram of power supply unit, wherein U3 is ASM1117, for LDO power supply chip, it belongs to low voltage difference (LDO) linear voltage stabilization chip, and LDO linear voltage stabilization chip cost is low, and noise is low, quiescent current is little, the outward element that it needs is simultaneously also little, conventionally only needs one or two shunt capacitance, has so just greatly simplified the peripheral circuit of chip.Add the utility model scheme and adopt single supply design, the volume of whole circuit design just has further obtained dwindling.1 pin of U3 is chip earth terminal, external GND, and in figure, 5V voltage inputs to 3 pin of U3 simultaneously through C25, C26 filtering, and 4 pin of U3 are Voltage-output pin, through exporting 3.3V voltage after C23, C24 filtering.In the utility model embodiment, the operating voltage of each subelement is 3.3V.

TRF7970A chip is the NFC chip that TI company goes out, and supports near-field communication standard NFCIP-1 (ISO/IEC18092) and NFCIP-2 (ISO/IEC 21481), and the fully-integrated protocol processes of Felica.For all three bit rate (106kbps, 212kbps, 424kbps) with integrated encoder, demoder and the array frame NFC transmit leg of card emulation, the operation of active and passive target side, and it can carry out the arbitrary pattern in following three kinds of patterns: RFID/NFC reader, NFC equity point or card simulation model.

Below each circuit module of NFC payment unit is described:

Be illustrated in figure 6 the schematic diagram of crystal oscillating circuit, the clock that it provides adopts 13.56MHz.

Be illustrated in figure 7 the schematic diagram of match circuit, its pin RX_IN1 and RX_IN2 are as the input signal end of radio frequency chip circuit chip, pin TX_OUT is as the output signal end of radio frequency chip circuit chip, described match circuit adopts RC circuit to realize, and pin ANT1 and ANT2 are as external antennal interface.

Be illustrated in figure 8 the schematic diagram of radio frequency chip circuit, it adopts TRF7970A to realize, and chip TRF7970A has 2 receiver inputs: RX_IN1 (pin 8) and RX_IN2 (pin 9).Each input is connected to an external capacitive voltage divider to guarantee having can use through modulation signal from label in 1 input in 2 inputs at least.This framework has been eliminated any possible communication leak to reader by label, these 2 inputs of RX_IN1 and RX_IN2 are multiplexed into 2 receivers, i.e. main receiver and auxiliary reception device, but in specific works process, general only with main receiver reception, and auxiliary reception device is for signal quality monitoring.TRF7970A is connected to microcontroller chip by 22 pin and 20 pin, and interface is SPI interface.

The utility model electronic scales similar with other compared, and adopts modular organization, except the valuation of can weighing, can also work in HF frequency range; The agreement of supporting comprises: ISO14443TypeA, ISO14443TypeB, ISO18092.By NFC module, complete the functions such as E-Payment, snap gauge plan, point-to-point communication, make the not only heavy scale of a table scale just of electronic scales, and have the multiple functions such as E-Payment, identification, point-to-point communication, make its application can be more diversified.

In actual application, during such as electric payment transaction, electronic scales described in the utility model can first calculate dealing money by the pricing mode of weighing, and communicate by letter with consumer's the terminal device with NFC function or NFC electronic tag by NFC module, the dealing money of deduction consumer proper account, and form transaction data and send processor to, electronic scales is by the transaction data collecting simultaneously, and by wired or wireless network and server data center swap data, conveniently record Transaction Information, for capital settlement.And can increase bill printing module, according to user's needs, print corresponding information, as information such as Item Title, weight, unit price, total prices.

Those of ordinary skill in the art will appreciate that, embodiment described here is in order to help reader understanding's principle of the present utility model, should be understood to protection domain of the present utility model but be not limited to such special statement and embodiment.Everyly make various possible being equal to according to foregoing description and replace or change, be all considered to belong to the protection domain of claim of the present utility model.

Claims (1)

1. an electronic scales for rapid payment, is characterized in that, comprises microcontroller chip, shows module, LOAD CELLS, radio frequency chip circuit chip, match circuit, crystal oscillating circuit and power supply unit;

Described microcontroller chip carries out data interaction by SPI serial line interface and radio frequency chip circuit chip, its pin RX_IN1 and RX_IN2 are as the input signal end of radio frequency chip circuit chip, pin TX_OUT is as the output signal end of radio frequency chip circuit chip, described match circuit adopts RC circuit to realize, and pin ANT1 and ANT2 are as external antennal interface; Described crystal oscillating circuit is connected with radio frequency chip circuit; Described microcontroller chip is connected with showing module, LOAD CELLS by I2C bus; It is that 3.3V voltage is provided to microcontroller chip and radio frequency chip circuit chip by 5V voltage transitions that described power supply unit is used for.