CN214427998U - Near-field NFC and remote NB-IOT dual-channel circuit of intelligent water meter - Google Patents
Near-field NFC and remote NB-IOT dual-channel circuit of intelligent water meter Download PDFInfo
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- CN214427998U CN214427998U CN202120771789.6U CN202120771789U CN214427998U CN 214427998 U CN214427998 U CN 214427998U CN 202120771789 U CN202120771789 U CN 202120771789U CN 214427998 U CN214427998 U CN 214427998U
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Abstract
The utility model belongs to the technical field of the circuit, a intelligence water gauge near field NFC and long-range NB-IOT binary channels circuit is related to, including the NB SOC treater of low-power consumption, the NB SOC treater electricity of low-power consumption is connected with: interface circuit, eSIM card circuit, power supply circuit, radio frequency antenna circuit, NFC circuit are burned to the procedure, and the NFC circuit is used for switching over when the unable switch-on operator network of circuit and is connected to terminal or cell-phone that have NFC and carries out the communication and accomplish the function of collecting fee and inquiry water yield, the utility model discloses a NB-IOT SOC single-chip scheme has saved an outside MCU chip, has practiced thrift the cost of intelligent water gauge and has made the electronic parts integrated level of water gauge higher simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the circuit, a intelligence water gauge near field NFC and long-range NB-IOT binary channels circuit is related to.
Background
With the development of intellectualization in the water meter industry, the intelligent water meter is widely applied to daily life of people. The existing intelligent water meter mainly has three modes, namely an IC card or a wired data transmission water meter, an NB-IOT water meter and a radio frequency card water meter. Wherein, IC-card or wired mode transmission data water gauge adopts IC-card or wired mode transmission data usually, IC-card intelligent water gauge, the user purchases water and needs to purchase water to appointed place, has brought very big inconvenience for the user, the solenoid valve influences the valve and closes because incrustation scale and aquatic impurity under the long-term open mode simultaneously, makes the user continue the water use under the condition of not paying the fee, because IC-card intelligent water gauge can't insert the internet, makes the toll unit can't know the user water use in violation, in case discover also can't pay the multipurpose water fee to the user. The intelligent water meter with wired transmission has large construction and wiring workload, and the water meter cannot be read and controlled due to the damage of a communication cable; the existing NB-IOT water meter adopts a single NB-IOT channel mode, NB signals need to be supported by signal base stations of an operator, but for some remote mountain areas, the number of the signal base stations is reduced greatly, so that the intelligent water meter cannot work due to the fact that communication cannot be conducted in places without NB signals or places with poor signals; as for the radio frequency card water meter, although the 13.56M radio frequency card can be recharged through the NFC-function mobile phone, the radio frequency card is still used as a medium for swiping the card to recharge and purchase the smart water meter, if the card is lost or damaged, the user needs to report the card and make a repair, and the use is inconvenient. Therefore, an intelligent water meter circuit which can perform payment operation and further can be continuously used under the condition that data interaction cannot be realized when no user card or water meter cannot be connected due to weak network signals is urgently needed in the market.
Disclosure of Invention
The utility model provides a technical scheme that technical problem took is: the utility model provides an intelligence water gauge near field NFC and long-range NB-IOT binary channels circuit, includes the NB SOC treater of low-power consumption, and the NB SOC treater of low-power consumption is electrically connected with: the system comprises a program programming interface circuit, an eSIM card circuit, a power supply circuit, a radio frequency antenna circuit and an NFC circuit; the NFC circuit comprises a resistor R12, a capacitor C13, a capacitor C14, a digital triode Q4 and an NFC chip, and the connection mode of the NFC circuit is as follows: an SCL pin and an IIC interface of an SDA pin of an NFC chip are connected with an SCL pin and an SDA pin of a low-power-consumption NB SOC processor, a VCC pin of the NFC chip is connected with GND through a capacitor C13, a VOUT pin of the NFC chip is connected with GND through a capacitor C14, an IRQ pin of the NFC chip is connected with resistance R12 and then connected with VCC, an IRQ pin of the NFC chip is connected with an emitter of a digital triode Q4, and a collector of the digital triode Q4 is connected with a PSM _ EINT pin of the low-power-consumption NB SOC processor; pins IN1 and IN2 of the NFC chip are radio frequency signal input ends for connecting a radio frequency antenna.
Preferably, the programming interface circuit includes resistors R6, R8, R11 and a 5-pin programming interface J1, and the connection mode of the programming interface circuit is as follows: the interface 2 of the J1 is connected to a Reset pin of the EC616 through a resistor R6, the interface 3 of the J1 is connected to a main serial port RXD of the EC616 through a resistor R8, the interface 4 of the J1 is connected to a main serial port TXD of the EC616 through a resistor R11, the interface 1 of the J1 is connected to a power VCC, the interface 5 of the J1 is grounded, and the programming device performs program filling through an NB SOC processor with low power consumption of an interface of a mainboard of the intelligent water meter.
Preferably, the eSIM card circuit includes resistors R5, R7, R9, R10, capacitors C9, C10, C11, C12, and a chip SIM card, and the connection mode of the eSIM card circuit is as follows: the pin SIM _ VDD of the low-power-consumption NB SOC processor is connected to a VCC pin of the chip SIM card, the pin SIM _ RST of the low-power-consumption NB SOC processor is connected to a RESET pin of the chip SIM card through a resistor R5, the pin SIM _ CLK of the low-power-consumption NB SOC processor is connected to a CLOCK pin of the chip SIM card through a resistor R7, the pin SIM _ DATA of the low-power-consumption NB SOC processor is connected to a DATA pin of the chip SIM card through a resistor R9, a capacitor C9 is connected between the pin SIM _ VDD and GND of the chip SIM card, a capacitor C10 is connected between the DATA pin of the chip SIM card and the ground, a capacitor C11 is connected between the CLOCK pin of the chip SIM card and the ground, and a capacitor C12 is connected between the RESET pin of the chip SIM card and the ground.
Preferably, the chip SIM card adopts a chip card packaged by an industrial-grade patch, and the circuit conforms to the SIM card interface of the ISO7816 standard.
Preferably, the power circuit comprises capacitors C1, C2, C3 and a tantalum capacitor C4, and the connection mode of the power circuit is as follows: the power supply pin VBAT of the low-power-consumption NB SOC processor is connected with a power supply VCC, the power supply pin GND of the low-power-consumption NB SOC processor is connected with a power supply ground, and one end of the rear end of each of the parallel capacitors C1, C2, C3 and the tantalum capacitor C4 is connected with the power supply VCC, and the other end of the rear end of each of the parallel capacitors is connected with the power supply ground.
Preferably, the radio frequency antenna circuit includes capacitors C5, C6 and a resistor R1, and the connection mode of the radio frequency antenna circuit is as follows: the pin RF _ ANT of the NB SOC processor with low power consumption is connected to the antenna through a pi-type matching circuit consisting of C5, C6 and R1.
Preferably, the NB SOC processor with low power consumption employs a single chip processor EC 616.
Preferably, the NFC chip employs a chip FM11NT 081D.
Preferably, the dual-channel circuit further comprises a valve driving circuit, a data storage circuit, an LCD driving circuit and a flow metering circuit.
The utility model has the advantages that:
the utility model discloses a NFC technique joint NB-IOT communication mode, when having solved current intelligent water gauge and carrying out data exchange through the user card or through current network and management platform, when not having user card or the unable connection of network signal, can't realize the data interaction and then influence the problem of normal water, the utility model discloses a NB-IOT SOC single-chip scheme has saved an outside MCU chip, has practiced thrift the cost of intelligent water gauge and has made the electronic parts integration of water gauge higher simultaneously.
Drawings
FIG. 1 is a hardware schematic diagram of a near field NFC and remote NB-IOT dual channel circuit of an intelligent water meter;
FIG. 2 is a circuit diagram of NB-IOT communications;
fig. 3 is a block diagram of an NFC functional structure;
fig. 4 is a circuit diagram of NFC communication;
FIG. 5 is a block diagram of a valve actuation module;
FIG. 6 is a valve drive circuit diagram;
FIG. 7 is a data storage circuit diagram;
FIG. 8 is an LCD driving circuit diagram;
fig. 9 is a flow metering circuit diagram.
Detailed Description
The related art in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is to be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-9, an intelligence water gauge near field NFC and remote NB-IOT dual-channel circuit includes the NB SOC treater of low-power consumption, and the NB SOC treater of low-power consumption is electrically connected with: the system comprises a program programming interface circuit, an eSIM card circuit, a power supply circuit, a radio frequency antenna circuit and an NFC circuit; the NFC circuit comprises a resistor R12, a capacitor C13, a capacitor C14, a digital triode Q4 and an NFC chip, and the connection mode of the NFC circuit is as follows: an SCL pin and an IIC interface of an SDA pin of an NFC chip are connected with an SCL pin and an SDA pin of a low-power-consumption NB SOC processor, a VCC pin of the NFC chip is connected with GND through a capacitor C13, a VOUT pin of the NFC chip is connected with GND through a capacitor C14, an IRQ pin of the NFC chip is connected with resistance R12 and then connected with VCC, an IRQ pin of the NFC chip is connected with an emitter of a digital triode Q4, and a collector of the digital triode Q4 is connected with a PSM _ EINT pin of the low-power-consumption NB SOC processor; pins IN1 and IN2 of the NFC chip are radio frequency signal input ends for connecting a radio frequency antenna.
Furthermore, the programming interface circuit comprises resistors R6, R8, R11 and a 5-pin programming interface J1, and the connection mode of the programming interface circuit is as follows: the interface 2 of the J1 is connected to a Reset pin of the EC616 through a resistor R6, the interface 3 of the J1 is connected to a main serial port RXD of the EC616 through a resistor R8, the interface 4 of the J1 is connected to a main serial port TXD of the EC616 through a resistor R11, the interface 1 of the J1 is connected to a power VCC, the interface 5 of the J1 is grounded, and the programming device performs program filling through an NB SOC processor with low power consumption of an interface of a mainboard of the intelligent water meter.
Further, the eSIM card circuit includes resistors R5, R7, R9, R10, capacitors C9, C10, C11, C12, and a chip SIM card, and the connection mode of the eSIM card circuit is: a pin SIM _ VDD of the low-power-consumption NB SOC processor is connected to a VCC pin of the chip SIM card, a pin SIM _ RST of the low-power-consumption NB SOC processor is connected to a RESET pin of the chip SIM card through a resistor R5, a pin SIM _ CLK of the low-power-consumption NB SOC processor is connected to a CLOCK pin of the chip SIM card through a resistor R7, a pin SIM _ DATA of the low-power-consumption NB SOC processor is connected to a DATA pin of the chip SIM card through a resistor R9, a capacitor C9 is connected between the pin SIM _ VDD and GND of the chip SIM card, a capacitor C10 is connected between the DATA pin of the chip SIM card and the ground, a capacitor C11 is connected between the CLOCK pin of the chip SIM card and the ground, and a capacitor C12 is connected between the RESET pin of the chip SIM card and the ground; the SIM _ DATA of the chip SIM card is pulled up by an SIM _ VDD power supply 10K, so that the SIM _ DATA has a stable high level in a tri-state to improve the driving capability and improve the waveform, and meanwhile, capacitors are connected in parallel between the SIM _ RST, the SIM _ CLK, the SIM _ DATA and the GND of the chip SIM card and used for filtering the interference of radio frequency signals.
Furthermore, the chip SIM card adopts a chip card packaged by an industrial grade patch, and the circuit conforms to the SIM card interface of the ISO7816 standard.
Further, the power circuit comprises capacitors C1, C2, C3 and a tantalum capacitor C4, and the connection mode of the power circuit is as follows: the power supply pin VBAT of the low-power-consumption NB SOC processor is connected with a power supply VCC, the power supply pin GND of the low-power-consumption NB SOC processor is connected with a power supply ground, and one end of the rear end of each of the parallel capacitors C1, C2, C3 and the tantalum capacitor C4 is connected with the power supply VCC, and the other end of the rear end of each of the parallel capacitors is connected with the power supply ground.
Further, the radio frequency antenna circuit comprises capacitors C5, C6 and a resistor R1, and the connection mode of the radio frequency antenna circuit is as follows: a pin RF _ ANT of the NB SOC processor with low power consumption is connected to an antenna through a pi-type matching circuit consisting of C5, C6 and R1; by default, C5, C6 are not welded, and R1 is welded at 0 ohm resistance.
Further, the NB SOC processor with low power consumption employs a single chip processor EC 616.
Further, the NFC chip employs a chip FM11NT 081D.
Furthermore, the dual-channel circuit further comprises a valve driving circuit, a data storage circuit, an LCD driving circuit and a flow metering circuit.
Examples
In this embodiment, the NB-IOT module employs a high-integration NB-IOT SoC single-chip processor EC 616; the metering sensing module adopts a pulse and UART compatible interface design, the LCD display module adopts a TM1730 chip, the valve driving module adopts an MS3111S chip, the memory module adopts a BL24C16A chip, and the NFC module adopts an FM11NT081D chip.
The utility model discloses an intelligence valve accuse water gauge of binary channels communication that NFC near field and long-range NB-IOT combined, the NB-IOT SOC single-chip scheme of use has saved an outside MCU chip, and the cost of having practiced thrift the intelligence water gauge makes the electronic parts integrated level of water gauge higher simultaneously.
The hardware part based on the near-field NFC and the remote NB-IOT dual-channel intelligent water meter is shown in fig. 1, a low-power consumption NB SOC processor (AP) scheme is adopted, a baseband processor platform of the EC616 can configure CPU frequency, 8-channel DMA, a 26MHz TCXO and 32.768KHz crystal oscillator clock source are integrated inside, 1.8/2.8/3.3V GPIO can be flexibly configured and supported, 6 external awakening sources are supported, a unique low-power consumption architecture and a 4-level sleep mode are supported. The chip supports domestic B3, B5 and B8 frequency bands, integrates a PA, supports an APT function and has a power level of 3.
The application comprises the following steps:
open-supported CPU
Software compliant CMSIS architecture
Support for mainstream cloud services: china telecom APE, China Mobile OneNet
-IPv4,IPv6 and non-IP
-UDP、TCP
-DTLS,TLS,SSL
-MQTT,CoAP,HTTP(S)
-LWM2M
Support of FOTA
Voltage range: 2.2V to 4.5V
NB-IOT communication circuit as shown in FIG. 2, supports national telecom B5, mobile B8, Unicom B3 and other NB-IOT frequency band whole network communication scheme
NB-IOT communication circuit: an NB-IOT radio frequency transceiver, PA and power management are integrated in an EC616 of a low-power consumption NB SOC processor (AP), the EC616 supports the 3GPP Rel14 NB-IoT standard, and comprises a USIM interface which is connected with an eSIM card through an ESD protection circuit. The radio frequency output circuit knows the radio frequency antenna through the pi-shaped impedance matching circuit, so that communication based on an NB-IOT network is completed.
Fig. 3 shows a functional block diagram of NFC, and fig. 4 shows a communication circuit of NFC
An NFC circuit: and a domestic FM11NT081D chip is adopted to realize the NFC function. This NB SOC scheme intelligence water gauge, work at ordinary times at the low-power consumption mode, the data interaction with the smart mobile phone is accomplished through the NFC interface to the NB SOC treater (AP) EC616 of low-power consumption through IIC interface and NFC chip FM11NT081D communication, when the smart mobile phone that has intelligent water gauge APP and uses is close the NFC antenna, trigger NFC data reception and interrupt, thereby awaken up NB SOC AP treater, carry out the data interaction, after the interaction is accomplished, get into the low-power consumption mode.
The intelligent mobile phone configures parameters and an online strategy of the water meter through the NFC channel, the intelligent water meter is connected with the NB-IOT network according to the configured online strategy, reports water meter data regularly and receives downlink commands or parameters.
The structure block diagram of the valve driving module is shown in FIG. 5, and the circuit of the valve driving circuit is shown in FIG. 6
A valve drive circuit: the valve motor driving scheme of the intelligent water meter can be realized under the power supply of the battery by adopting a domestic MS3111S chip. And the low-power consumption NB SOC processor (AP) EC616 is connected with the MS3111S chip through GPIOs to control the forward and reverse rotation and in-place detection of the valve motor and the low-power consumption mode.
Data storage circuit as shown in FIG. 7
A data storage circuit: the data storage and the PCB distribution difficulty of the PCB are realized by adopting a small-size domestic BL24C16A (SOT-23-5) EEPROM chip, and the standby power consumption of the chip is only 2 uA; the NB SOC processor (AP) EC616 is connected with the BL24C16A chip through the IIC interface, and can timely store parameters, data, historical records and the like of the intelligent water meter.
LCD drive circuit is shown in FIG. 8
LCD drive circuit: and a domestic liquid crystal drive TM1730 chip is adopted to realize liquid crystal display. The NB SOC processor (AP) EC616 is connected with the TM1730 in an IIC bus interface mode, so that the PCB design difficulty is reduced; the liquid crystal driving chip can complete liquid crystal display only by a standby current of a few uA.
The flow rate measuring circuit is shown in FIG. 9
The detection of pulse equivalent and the power consumption control are realized by utilizing a GPIO (general purpose input/output) with a terminal function of an NB (NB SOC) processor (AP) EC616 and a controllable pull-up resistor. The pulse equivalent interface is connected with the UART direct reading gauge head sensor by matching the flow meter metering circuit, and the flow collection and the power consumption control can be realized by the mode. The circuit can be adapted to different sampling sensors, when the sampling mode is a pulse sampling mode, the GPIO port with the interrupt function can be effectively controlled, and the pull-up resistor is switched off after pulse triggering so as to reduce power consumption; when the UART direct-reading meter head is used for sampling, the power supply of the UART direct-reading meter head can be controlled by the MOS after the sampling period comes, and the power is cut off after the sampling is finished so as to reduce the power consumption of the intelligent water meter.
To sum up, the utility model discloses a NFC technique joint NB-IOT communication mode, when having solved current intelligent water gauge and carrying out data exchange through the user card or through current network and management platform, when not having user card or the unable connection of network signal, can't realize the data interaction and then influence the problem of normal water. Therefore, the utility model overcomes thereby the not enough of prior art has good application prospect.
It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form, and any simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides an intelligence water gauge near field NFC and long-range NB-IOT binary channels circuit which characterized in that, includes the NB SOC treater of low-power consumption, the NB SOC treater of low-power consumption is electrically connected with: the system comprises a program programming interface circuit, an eSIM card circuit, a power supply circuit, a radio frequency antenna circuit and an NFC circuit;
the NFC circuit comprises a resistor R12, capacitors C13, C14, a digital triode Q4 and an NFC chip, and the connection mode of the NFC circuit is as follows: an SCL pin and an IIC interface of an SDA pin of an NFC chip are connected with an SCL pin and an SDA pin of a low-power-consumption NB SOC processor, a VCC pin of the NFC chip is connected with GND through a capacitor C13, a VOUT pin of the NFC chip is connected with GND through a capacitor C14, an IRQ pin of the NFC chip is connected with resistance R12 and then connected with VCC, an IRQ pin of the NFC chip is connected with an emitter of a digital triode Q4, and a collector of the digital triode Q4 is connected with a PSM _ EINT pin of the low-power-consumption NB SOC processor; pins IN1 and IN2 of the NFC chip are radio frequency signal input ends for connecting a radio frequency antenna.
2. The near-field NFC and remote NB-IOT dual-channel circuit of an intelligent water meter according to claim 1, wherein the programming interface circuit comprises resistors R6, R8, R11 and a 5-pin programming interface J1, and the programming interface circuit is connected in a manner that: the interface 2 of the J1 is connected to a Reset pin of the EC616 through a resistor R6, the interface 3 of the J1 is connected to a main serial port RXD of the EC616 through a resistor R8, the interface 4 of the J1 is connected to a main serial port TXD of the EC616 through a resistor R11, the interface 1 of the J1 is connected to a power VCC, the interface 5 of the J1 is grounded, and the programming device performs program filling through an NB SOC processor with low power consumption of an interface of a mainboard of the intelligent water meter.
3. The near-field NFC and remote NB-IOT dual-channel circuit of the intelligent water meter according to claim 1, wherein the eSIM card circuit comprises resistors R5, R7, R9, R10, capacitors C9, C10, C11, C12 and a chip SIM card, and the connection mode of the eSIM card circuit is as follows: the pin SIM _ VDD of the low-power-consumption NB SOC processor is connected to a VCC pin of the chip SIM card, the pin SIM _ RST of the low-power-consumption NB SOC processor is connected to a RESET pin of the chip SIM card through a resistor R5, the pin SIM _ CLK of the low-power-consumption NB SOC processor is connected to a CLOCK pin of the chip SIM card through a resistor R7, the pin SIM _ DATA of the low-power-consumption NB SOC processor is connected to a DATA pin of the chip SIM card through a resistor R9, a capacitor C9 is connected between the pin SIM _ VDD and GND of the chip SIM card, a capacitor C10 is connected between the DATA pin of the chip SIM card and the ground, a capacitor C11 is connected between the CLOCK pin of the chip SIM card and the ground, and a capacitor C12 is connected between the RESET pin of the chip SIM card and the ground.
4. The near-field NFC and remote NB-IOT dual-channel circuit of the intelligent water meter according to claim 3, wherein the SIM card of the chip is a chip card packaged by an industrial-grade patch, and the circuit conforms to an ISO7816 standard SIM card interface.
5. An intelligent water meter near-field NFC and remote NB-IOT dual-channel circuit as claimed in claim 1, wherein the power circuit includes capacitors C1, C2, C3 and tantalum capacitor C4, and the power circuit is connected in the following manner: the power supply pin VBAT of the low-power-consumption NB SOC processor is connected with a power supply VCC, the power supply pin GND of the low-power-consumption NB SOC processor is connected with a power supply ground, and one end of the rear end of each of the parallel capacitors C1, C2, C3 and the tantalum capacitor C4 is connected with the power supply VCC, and the other end of the rear end of each of the parallel capacitors is connected with the power supply ground.
6. The near-field NFC and remote NB-IOT dual-channel circuit of the intelligent water meter according to claim 1, wherein the radio frequency antenna circuit comprises capacitors C5, C6 and a resistor R1, and the connection mode of the radio frequency antenna circuit is as follows: the pin RF _ ANT of the NB SOC processor with low power consumption is connected to the antenna through a pi-type matching circuit consisting of C5, C6 and R1.
7. The near-field NFC and remote NB-IOT dual-channel circuit of an intelligent water meter according to claim 1, wherein the low power consumption NB SOC processor is a single chip processor EC 616.
8. The near-field NFC and remote NB-IOT dual-channel circuit of an intelligent water meter as claimed in claim 1, wherein the NFC chip is chip FM11NT 081D.
9. The near-field NFC and remote NB-IOT dual-channel circuit of an intelligent water meter according to claim 1, wherein the dual-channel circuit further comprises a valve driving circuit, a data storage circuit, an LCD driving circuit and a flow metering circuit.
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| CN202120771789.6U CN214427998U (en) | 2021-04-15 | 2021-04-15 | Near-field NFC and remote NB-IOT dual-channel circuit of intelligent water meter |
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| CN202120771789.6U CN214427998U (en) | 2021-04-15 | 2021-04-15 | Near-field NFC and remote NB-IOT dual-channel circuit of intelligent water meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114915307A (en) * | 2022-07-14 | 2022-08-16 | 荣耀终端有限公司 | SIM card communication circuit and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114915307A (en) * | 2022-07-14 | 2022-08-16 | 荣耀终端有限公司 | SIM card communication circuit and electronic equipment |
| CN114915307B (en) * | 2022-07-14 | 2022-11-25 | 荣耀终端有限公司 | SIM card communication circuit and electronic equipment |
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