CN105279855B - NFC radio frequency CPU card intelligent gas meters - Google Patents
NFC radio frequency CPU card intelligent gas meters Download PDFInfo
- Publication number
- CN105279855B CN105279855B CN201410353795.4A CN201410353795A CN105279855B CN 105279855 B CN105279855 B CN 105279855B CN 201410353795 A CN201410353795 A CN 201410353795A CN 105279855 B CN105279855 B CN 105279855B
- Authority
- CN
- China
- Prior art keywords
- circuit
- nfc
- nfc radio
- card
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Beverage Vending Machines With Cups, And Gas Or Electricity Vending Machines (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The invention discloses a kind of NFC radio frequency CPU cards intelligent gas meter for belonging to intelligence instrument technical field.It is made up of master control borad and NFC radio-frequency modules; first single-chip microcomputer respectively with liquid crystal display drive circuit; external data storage circuit; real time clock circuit; flow pulse gathers and magnetic protection interface circuit; power-off reset protection circuit; valve driving interface circuit; button shows and swiped the card control logic circuit, NFC radio-frequency module communication interface circuits, and MCU DLL circuits are connected with power management module; power management module is connected with power supply; second singlechip is connected with NFC wireless transmitter receiver circuits, power supply, main control board data communication interface circuit respectively.The NFC radio frequency CPU cards intelligent gas meter of the present invention saves electricity, and resistance high voltage capability is strong, and safety coefficient is high, and circuit voltage is stable, and numerical value is supplemented in reading with money and modification numerical value is convenient, reliably.
Description
Technical field
The invention belongs to intelligence instrument technical field, and in particular to a kind of NFC radio frequency CPU cards intelligent gas meter.
Background technology
IC-card technology application starts from the phase at the beginning of the nineties in last century, experienced storage card, logic encryption card, CPU card, radio frequency and patrols
Encrypted card and the development of the generation of radio frequency CPU card five are collected, radio frequency CPU card is the high technology content IC-card of the newest release on the basis of preceding four generation
Product, it is that REID and CPU card technology are combined Non-contact Intelligent IC Card by one kind, realizes passive and exempts from
Data communication is contacted, when card is close to gas meter, flow meter or read write line surface, the read-write operation to card data can be completed.
RF IC card is widely used to city bus, municipal administration by nearly development for many years, various types of RF IC cards
The various fields such as management, Digital Community, toll on the road and bridge and government utility charge, as the radio frequency for representing IC-card latest technology
CPU card, the changing of a new generation of Ministry of Public Security resident identification card, city one-card and banking system conventional magnetic stripe are mainly used at present
The renewal of card.Radio frequency CPU card safe and reliable, attack protection, dustproof and waterproof, can effectively solve early stage as information transmitting medium
The various problems that Contact Type Ic Card gas meter, flow meter occurs.The NFC radio frequency CPU card gas meter, flow meter products of newest research and development, using meeting China
The People's Bank issues and implements PBOC2.0 standards（Stored value card）With the contactless CPU card of Ministry of Construction IC-card application specification, have most
High level safe class.
With the development of modernization, the use of gas meter, flow meter is more and more extensive, however, the security performance supplemented with money of gas meter, flow meter
Low, the display screen of gas meter, flow meter is chronically at dispaly state, and power consumption is higher, is unsatisfactory for modern and pursues green theory,
Complex circuit near gas meter, flow meter, often in electrostatic high-pressure state, resistivity of the current gas meter, flow meter to electrostatic high-pressure
Difference, safety coefficient are low.
The content of the invention
The defects of present invention is directed to prior art, proposes a kind of NFC radio frequency CPU cards intelligent gas meter.
A kind of NFC radio frequency CPU cards intelligent gas meter, is made up of master control borad and NFC radio-frequency modules；
The master control harden structure is as follows：First single-chip microcomputer respectively with liquid crystal display drive circuit, external data storage circuit,
Real time clock circuit, flow pulse collection and magnetic protection interface circuit, power-off reset protection circuit, valve driving interface circuit,
Button shows and swiped the card control logic circuit, NFC radio-frequency module communication interface circuits, MCU DLLs circuit and power management
Module is connected, and power management module is connected with power supply；
The external data storage circuit is used for permanently storing for control system critical data；
The real time clock circuit is used to be history with destiny evidence, gas price adjust, inspection comdemning period and ladder gas price carry by force
For clock foundation；
The button show and swipe the card control logic circuit be used for control button show the time and triggering NFC radio-frequency modules open
Start building to make；
The NFC radio-frequency modules communication interface circuit is realized with NFC radio-frequency modules by connector or cable and communicated；
The NFC radio-frequency modules structure is as follows：Second singlechip respectively with NFC wireless transmitter receiver circuits, power supply, master control
Plate data communication interface circuit is connected；NFC wireless transmitter receivers circuit carries microstrip antenna with pcb board and is connected；NFC wireless transmissions connect
Circuit is received respectively with power supply and main control board data communication interface circuit to be connected；
The main control board data communication interface circuit is used to realize the data interaction between the first single-chip microcomputer and second singlechip；
The NFC wireless transmitter receivers circuit is used to realize to be interacted with second singlechip non-contact data.
The flow pulse collection and magnetic protection interface circuit are sampled from open type reed capsule dipulse flow signal, magnetic
Protection and no pulse protection.
First single-chip microcomputer is MSP430F series monolithics；The second singlechip is MSP430G series monolithics.
The power management module includes power-fail detection circuit, low power testing circuit, mu balanced circuit and high tension protection circuit；
Power-fail detection circuit, low power testing circuit, mu balanced circuit are connected with the first single-chip microcomputer respectively, high tension protection circuit ground connection.
The high tension protection circuit is using Transient Suppression Diode 5KP series and overcurrent protector BK series.
Beneficial effects of the present invention：The NFC radio frequency CPU cards intelligent gas meter of the present invention is in non-working condition condition ShiShimonoseki
Screen, spread its tail automatically during use, save electricity, resistance high voltage capability is strong, and safety coefficient is high, and circuit voltage is stable, and reading is supplemented with money
Numerical value and modification numerical value are convenient, reliably.
Brief description of the drawings
Fig. 1 is master control plate structure schematic diagram.
Fig. 2 is NFC radio-frequency module structural representations.
Fig. 3 is NFC radio frequency CPU cards intelligent gas meter workflow diagram of the present invention.
Embodiment
The present invention will be further described with specific embodiment 1 below in conjunction with the accompanying drawings.
Embodiment 1
A kind of NFC radio frequency CPU cards intelligent gas meter, is made up of master control borad and NFC radio-frequency modules；
As shown in figure 1, the master control harden structure is as follows：First single-chip microcomputer respectively with liquid crystal display drive circuit, external number
According to storage circuit, real time clock circuit, flow pulse collection and magnetic protection interface circuit, power-off reset protection circuit, valve drive
Mobile interface circuit, button show and swiped the card control logic circuit, NFC radio-frequency module communication interface circuits, MCU DLL circuits
It is connected with power management module, power management module is connected with power supply；
The power management module includes power-fail detection circuit, low power testing circuit, mu balanced circuit and high tension protection circuit；
Power-fail detection circuit, low power testing circuit, mu balanced circuit are connected with the first single-chip microcomputer respectively, high tension protection circuit ground connection.
First single-chip microcomputer selects MSP430F series monolithics, has ultra low voltage and super low-power consumption, is suitably applied
Using the battery powered environment that works long hours, using 16 reduced instruction sets, there is flexible power-supply management system, when more
Clock pattern and serial onboard programming, are integrated with 16 bit registers and constant generator, and code efficiency is high, and embedded digital control is shaken
Device DCO is swung, the μ s of conversion time 3 ~ 6 is waken up, is designed with 16 bit timing devices, comparator, segment encode lcd driver and general purpose I/O draw
Pin.
The power supply is from the general dry cell power supply of AA types that use cost is cheap and easily buys, design service life
More than 1 year, operating voltage DC6V（DC1.5V x 4）.
The external data storage circuit（EEPROM）For permanently storing for control system critical data, use
CAT24WC series, I2C communication modes, data retention cycle is more than 100 years, effective erasable more than 100,000 times, circuit work
Power supply is controlled by single-chip microcomputer mouth line, usually in non-powering state, to prevent the improper rewriting of data and saving system power dissipation.For
It is easy to product maintenance, using the pluggable encapsulation of DIP8, facilitates system data to shift.
The mu balanced circuit（LDO）Using Seiko S-812C series cmos voltage voltage-stablizers, DC3V is provided for control circuit
With DC3.3V power supplys, S-812C series LDO voltage stabilizers have the spies such as high withstand voltage, super low-power consumption, low voltage difference and larger output current
Point, it is adapted to require that low power consuming product uses.
The low-voltage detection circuit uses Seiko S-808 series high-accuracy voltage detectors, has low-power consumption（1uA）,
High accuracy（5%）And the features such as low cost, the circuit provide DC3.6V and DC4.5V two and keep off battery low power testing, it is ensured that control electricity
The stable power work environment in road.When battery electric quantity deficiency, battery low-voltage signal, the first monolithic are sent to the first single-chip microcomputer
Machine preserves data to EEPROM, closes valve, send alarm indication instruction after useful signal is received.
The power-fail detection circuit completes the detection of power-off signal, and single-chip microcomputer preserves data after useful signal is received
To EEPROM, valve is simultaneously closed off, sends alarm indication instruction.Emphasis is needed to consider that solving battery power down shake is likely to cause
System disorders and random number problem.
The high voltage protection circuit（ESD）Using Transient Suppression Diode 5KP series and overcurrent protector BK series, prevent
Only impact of the high voltage such as electrostatic to control system.
The MCU DLLs circuit：The circuit can repeat without applied voltage to single-chip microcomputer FLASH program areas
Programming, it is easy to the program renewal after design phase production debugging and batch production.
The NFC radio-frequency modules communication interface circuit can realize carrying out shake communication by connector or cable with radio-frequency module,
Interface defines 6 line systems, including DC3V and ground wire, 4 SPI serial communication bus.Realize radio-frequency module MCU and main control board
Data interaction between MCU, complete the reading to radio frequency CPU card and NFC device and return to write.
The liquid crystal display and drive circuit（LCD）：Liquid crystal display uses segment code type single color display screen, for showing maximum
99999.99 digital information（Such as：Surplus, cumulative amount, unit price value and arrange parameter etc.）And fixed character field（Such as：It is " surplus
It is remaining " " accumulative " " low electricity " " owing amount " " mistake card " " pass valve " " protection " " member " etc.）, drive circuit use built in single-chip microcomputer LCD drive,
Special mouth line is shown by configuring I/O offers LCD.
The real time clock circuit（RTC）From SD2403AP real-time timepiece chips, and it is equipped with specialized lithium Asia battery
ER14250H, Theoretical Design life-span reach more than 15 years, disclosure satisfy that gas meter, flow meter service life requirement in 10 years, real-time clock master
To be adjusted for history with destiny evidence, gas price, strong inspection comdemning period and ladder gas price provide basis of time.
The flow pulse collection and magnetic protection interface circuit are from the sampling of open type reed capsule dipulse flow signal, magnetic
Protection and no pulse protection, pulse equivalency 0.1m3/P, projected life, more than 500,000 times magnetic fluxs broke, and dipulse metering can solve
More enumeration problems caused by certainly easily there is shake in pulse metering.
The power-off reset protection circuit：First single-chip microcomputer operating voltage is in zero boundary operating point（Minimum operating voltage is attached
Closely）When, I/O port status is likely to be in abnormal condition, so that influenceing peripheral circuit produces malfunction, causes system random
Number, fall the problems such as number and deadlock.To avoid the generation of this phenomenon, circuit design is realized to the first monolithic using voltage checking chip
The pressure of machine reseting pin drags down, i.e., some value between critical point and low voltage point is by single-chip microcomputer forced resetting, to protect
Data reliably preserve before protecting system power down, can also meet the requirement of the first single-chip microcomputer electrification reset in addition.
2 kinds of schemes can be selected in the valve driving interface circuit, and scheme one is transistor coupling control circuit, it is possible to provide super
500mA two way valve driving current is crossed, valve is pass type valve using the two-way no stall of electromechanical integration, and reliable open and close are secondary
Number is more than 8000 times, and running current is less than 50 mA.Scheme two uses special valve driving chip, it is possible to provide exceedes
1200mA two way valve driving current, level combinations are provided to driving chip by configuring 2 delivery outlets of single-chip microcomputer.
The button control logic circuit effect that shows and swipe the card is not only single display inquiry, due to radio-frequency module electricity
The operating current on road is larger, opens radio-frequency module for a long time by the very big service life for shortening battery, therefore design uses button
Logic of swiping the card can effectively avoid the generation of problem above, while also can guarantee that the ageing and stability of wireless card reading.
As shown in Fig. 2 the NFC radio-frequency modules structure is as follows：Second singlechip is electric with NFC wireless transmitter receivers respectively
Road, power supply, main control board data communication interface circuit are connected；NFC wireless transmitter receivers circuit carries microstrip antenna with pcb board and is connected；
NFC wireless transmitter receivers circuit is connected with power supply and main control board data communication interface circuit respectively；
The second singlechip（MCU）It is the mixed signal processing based on 16bit RISC for MSP430G series monolithics
Device, aim at meet super low-power consumption, Ultra Low Cost demand and design.Highest dominant frequency reaches as high as 16K up to 16Mips, Flash
Bytes, RAM reach as high as 512 Bytes, minimum encapsulation TSSOP14.
The power supply is derived from the DC3V of master control borad, and the supply voltage is controlled by master control borad single-chip microcomputer, only when master control borad is examined
Measured button swipe the card input signal when, just this power supply control is opened, the term of validity is the liquid crystal display time, and liquid crystal display terminates
Shut-off power supply afterwards.
The main control board data communication interface circuit realizes carrying out shake communication by connector or cable and master control borad, and interface is fixed
Adopted 6 line systems, including DC3V and ground wire, 4 SPI serial communication bus.Realize between radio-frequency module MCU and main control board MCU
Data interaction.
The NFC wireless transmitter receivers circuit is that the radio frequency chip CV520 realizations based on NXP are set with radio frequency CPU card or NFC
Standby non-contact data interacts, and CV520 is the contactless read-write chip of a low-voltage, low cost, small volume, working frequency
13.56MHz, supports TypeA the and MIFARE communication protocols of ISO/IEC 14443, and effective communication distance is less than 20mm.
The pcb board carries microstrip antenna and NFC wireless transmitter receivers circuit in same circuit board, exempts from feeder line connection, rectangle
Micro-strip designs, and is made up of 4 circle induction coils, frequency 13.56MHz, distance of reaction is less than 20mm.
The logical flow chart of above-mentioned NFC radio frequency CPU cards gas meter, flow meter work is as shown in figure 3, it can be implemented function such as：
（1）Non-contact radio-frequency CPU card prepaying charge, using the stored value card and CPU card for meeting financial PBOC2.0 standards
Encryption logic and multi-zone supervision issuing mechanism, it is the new all-purpose card system schema with highest safe class.
（2）Compatible NFC function, it is adapted to newest intelligent handheld device near field communication standard, supports the Third-party payment side of supplementing with money
Formula.
（3）The storage of history destiny evidence, can the most long accumulation gas consumption for preserving 24 months.
（4）Ladder support gas price function, algorithm, which includes, uses gas peak valley ladder and period dosage ladder, and the wherein period is used
Amount ladder can realize that 2 sections 3 grades set the maximum 6 grades of ladder gas prices of combination.
（5）Prevent dead table function, there is 2 grades of dead table protections, the corresponding different grade that decontrols of every grade of protection.
（6）Strong inspection sets function, can according to demand set and enable good general's function of periodically registering one's residence, and the strong pre- prompting of inspection, exceeds the time limit to protect
Shield.
（7）Unit price is measured, amount balance, and prestore the amount of money and existing unit price in table, and button gas equivalent is held by unit price conversion in table
OK.
（8）Default price adjustment function, new gas price can be preset by subscriber card and price adjustment card and enable the date, there is hysteresis price adjustment
Tracing function.
（9）Exceed the time limit to scrap function, table tool service life can be set, expire pre- prompting, exceeds the time limit to use mandatory protection.
（10）Button function of swiping card, meet that system low-power consumption designs, radio-frequency module is chronically at off working state, only pressed
Power-up work before liquid crystal display terminates after key, the validity and stability of the communication that can ensure while low power consuming to swipe the card.
（11）Subscriber card data, which are returned, writes acquisition function, and table tool system data can be returned by subscriber card and data collecting card to be write
Management system, it is easy to analysis gas situation and table to have maintenance.Design logic is to purchase gas after must being swiped the card on the day of user purchases gas, is otherwise managed
Gas writing operation is sold in the limitation of reason system, is returned with to reach user data and is write ageing requirement.
Claims (1)
1. a kind of NFC radio frequency CPU cards intelligent gas meter, it is characterised in that be made up of master control borad and NFC radio-frequency modules；
The master control harden structure is as follows：First single-chip microcomputer respectively with liquid crystal display drive circuit, external data storage circuit, in real time
Clock circuit, flow pulse collection and magnetic protection interface circuit, power-off reset protection circuit, valve driving interface circuit, button
Show and swipe the card control logic circuit, NFC radio-frequency module communication interface circuits, MCU DLLs circuit and power management module
It is connected, power management module is connected with power supply；
The external data storage circuit is used for permanently storing for control system critical data；
When the real time clock circuit is used to be provided with destiny evidence, gas price adjustment, strong inspection comdemning period and ladder gas price for history
Clock foundation；
The button shows and swiped the card control logic circuit for control button display time and triggering NFC radio-frequency module startup works
Make；
The NFC radio-frequency modules communication interface circuit is realized with NFC radio-frequency modules by connector or cable and communicated；
The NFC radio-frequency modules structure is as follows：Second singlechip respectively with NFC wireless transmitter receiver circuits, power supply, master control borad number
It is connected according to communication interface circuit；NFC wireless transmitter receivers circuit carries microstrip antenna with pcb board and is connected；NFC wireless transmitter receivers electricity
Road is connected with power supply and main control board data communication interface circuit respectively；
The power supply is derived from the DC3V of master control borad, and the supply voltage is controlled by master control borad single-chip microcomputer, only when master control borad detects
Have button swipe the card input signal when, just this power supply control is opened, the term of validity is the liquid crystal display time, and liquid crystal display is closed after terminating
Cut-off electricity；
The main control board data communication interface circuit is used to realize the data interaction between the first single-chip microcomputer and second singlechip；
The NFC wireless transmitter receivers circuit is used to realize to be interacted with second singlechip non-contact data；The NFC wireless transmissions
Receiving circuit is that the radio frequency chip CV520 realizations based on NXP interact with radio frequency CPU card or NFC device non-contact data, CV520
It is the contactless read-write chip of a low-voltage, low cost, small volume, working frequency 13.56MHz, supports ISO/IEC
14443 TypeA andCommunication protocol, effective communication distance are less than 20mm；
The pcb board carries microstrip antenna and NFC wireless transmitter receivers circuit in same circuit board, exempts from feeder line connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410353795.4A CN105279855B (en) | 2014-07-24 | 2014-07-24 | NFC radio frequency CPU card intelligent gas meters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410353795.4A CN105279855B (en) | 2014-07-24 | 2014-07-24 | NFC radio frequency CPU card intelligent gas meters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105279855A CN105279855A (en) | 2016-01-27 |
| CN105279855B true CN105279855B (en) | 2018-03-09 |
Family
ID=55148794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410353795.4A Active CN105279855B (en) | 2014-07-24 | 2014-07-24 | NFC radio frequency CPU card intelligent gas meters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105279855B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134059A (en) * | 2017-05-22 | 2017-09-05 | 深圳市海威达科技有限公司 | Reader device intelligent maintenance device and method for water saving controller |
| CN113965589B (en) * | 2020-07-01 | 2024-05-14 | 成都秦川物联网科技股份有限公司 | Intelligent city network operation method and system based on intelligent gas meter |
| CN113838244A (en) * | 2021-09-28 | 2021-12-24 | 大连沃曼科技有限公司 | Intelligent card control valve hand controller |
| CN116684863A (en) * | 2022-12-06 | 2023-09-01 | 西安莱德燃气设备有限公司 | Radio frequency CPU card thing networking gas table based on secret chip of state |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1670489A (en) * | 2005-04-11 | 2005-09-21 | 西安华丰投资发展有限公司 | IC card intelligent gas meter |
| CN2783278Y (en) * | 2005-04-11 | 2006-05-24 | 西安华丰投资发展有限公司 | IC and intelligent gas meter |
| CN201015047Y (en) * | 2006-12-19 | 2008-01-30 | 北京握奇数据***有限公司 | Split type RF CPU card meter controller |
| CN202167079U (en) * | 2011-08-10 | 2012-03-14 | 佛山市南海科西亚数码电气有限公司 | Non-contact CPU (Central Processing Unit) card-bidding and card-paying system for vending machine |
| EP2669872A1 (en) * | 2011-01-25 | 2013-12-04 | Shao, Zehua | Internet of things intelligent gas meter and control system thereof |
| CN204143550U (en) * | 2014-07-11 | 2015-02-04 | 西安莱德燃气仪表有限公司 | NFC radio frequency CPU card intelligent gas meter |
-
2014
- 2014-07-24 CN CN201410353795.4A patent/CN105279855B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1670489A (en) * | 2005-04-11 | 2005-09-21 | 西安华丰投资发展有限公司 | IC card intelligent gas meter |
| CN2783278Y (en) * | 2005-04-11 | 2006-05-24 | 西安华丰投资发展有限公司 | IC and intelligent gas meter |
| CN201015047Y (en) * | 2006-12-19 | 2008-01-30 | 北京握奇数据***有限公司 | Split type RF CPU card meter controller |
| EP2669872A1 (en) * | 2011-01-25 | 2013-12-04 | Shao, Zehua | Internet of things intelligent gas meter and control system thereof |
| CN202167079U (en) * | 2011-08-10 | 2012-03-14 | 佛山市南海科西亚数码电气有限公司 | Non-contact CPU (Central Processing Unit) card-bidding and card-paying system for vending machine |
| CN204143550U (en) * | 2014-07-11 | 2015-02-04 | 西安莱德燃气仪表有限公司 | NFC radio frequency CPU card intelligent gas meter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105279855A (en) | 2016-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105279855B (en) | NFC radio frequency CPU card intelligent gas meters | |
| CN105488913A (en) | One-card and multi-meter multi-mode charging radio frequency card prepaid intelligent water meter and charging method | |
| CN102324144A (en) | Intelligent waterproof water meter with radio frequency (RF) card | |
| CN201796429U (en) | IC card prepayment water meter control circuit | |
| CN205123325U (en) | IC -card charging system | |
| CN204143550U (en) | NFC radio frequency CPU card intelligent gas meter | |
| CN106875577A (en) | A kind of intellectual water meter with leakage proof function | |
| CN102402704B (en) | Compound multifunctional IC card reader-writer | |
| CN103313365A (en) | Remote control metering system | |
| CN103150834A (en) | Management method of accumulator car toll collection system | |
| CN203101508U (en) | Single-phase remote cost control electric energy meter | |
| CN201562317U (en) | Three-phase three-wire CPU card intelligent electric energy meter | |
| CN202142131U (en) | Radio frequency card intelligent waterproof water meter | |
| CN205120170U (en) | Thing networking information system management safety gas table | |
| CN103823767A (en) | Encrypted mobile hard disk drive case with portable power source | |
| CN105118180A (en) | Intelligent water meter | |
| CN102298807A (en) | Intelligent low-power-consumption IC (Integrated Circuit) card film type gas meter | |
| CN202120056U (en) | Intelligent water meter controller of card type used for self-prepared well | |
| CN108168641A (en) | A kind of intelligence pre-payment IC Card Water-Instrument | |
| CN203102445U (en) | Intelligent battery car charging toll management machine | |
| CN206711102U (en) | A kind of card reader for the Contact Type Ic Card for being embedded in safe module | |
| CN204576674U (en) | Internet of Things intellective IC card wireless watermeter | |
| CN203616817U (en) | IC (integrated) card intelligent fuel gas meter with gas leakage warning and valve closing functions | |
| CN202177947U (en) | GPM (general-purpose microprocessor) module IC (integrated circuit) card intelligent gas meter with combustible gas alarm | |
| CN105426950A (en) | Ambiguity dual-frequency chargeable electronic label |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 710065 Shaanxi province Xi'an city high tech Development Zone New Industrial Park pioneering Avenue standard workshop A2 main building 5 layer, secondary building 4 layers Patentee after: XI'AN RED-X GAS METER CO.,LTD. Address before: 710065, Shaanxi Xi'an high tech Development Zone, new industrial park, pioneering road standard factory building, A2 main building, 5 floor Patentee before: XI'AN REDX GAS METER Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: NFC RF CPU card intelligent gas meter Effective date of registration: 20230627 Granted publication date: 20180309 Pledgee: Pudong Development Bank of Shanghai Limited by Share Ltd. Xi'an branch Pledgor: XI'AN RED-X GAS METER CO.,LTD. Registration number: Y2023610000496 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |