CN220108214U - Dual-mode communication module and intelligent gas meter - Google Patents

Abstract

The utility model provides a dual-mode communication module and an intelligent gas meter. The dual-mode communication module includes: a power control circuit, and an NB-IoT communication standard module and a SUB-G communication standard module that are respectively connected to the power control circuit; among them, the NB-IoT communication standard module includes the main microprocessor The device is connected to the slave microprocessor in the SUB‑G communication standard module, and is used to trigger the power control circuit to SUB‑G when it receives data to be uploaded and determines to use the SUB‑G communication standard module for data transmission. The communication standard module provides power and sends the data to be uploaded to the slave microprocessor; the SUB‑G communication standard module also includes: a radio frequency transceiver device that converts the data to be uploaded from digital signal form to analog signal form, and the analog The data to be uploaded in the form of a signal is transmitted to the first antenna of the external device. This effectively improves the efficiency, timeliness and anti-interference ability of the dual-mode communication module to transmit data.

Description

A dual-mode communication module and smart gas meter

Technical field

The utility model relates to the field of communication technology, and in particular to a dual-mode communication module and a smart gas meter.

Background technique

With the development of Narrow Band Internet of Things (NB-IoT), devices with IoT functions can work through operator networks, such as smart gas meters, water meters and smoke detectors with IoT functions. Networked devices can upload the data they collect to the corresponding management platform in real time or periodically through the narrowband Internet of Things, so that subsequent processing operations such as cost calculations can be performed based on these data.

Although NB-IoT has the advantages of low power consumption, large capacity, and strong coverage, due to factors such as network environment and cell capacity, IoT devices integrating NB-IoT may not be able to successfully upload collected data for a long time. . In order to prevent the problem of failure to successfully upload the collected data, it is also necessary to use local communication technology to upload the collected but unsuccessfully uploaded data to the centralized collection through local communication links, such as Bluetooth Low Energy (BLE). into the collector, and then upload these data to the corresponding management platform through the collector.

However, because the frequency band of BLE belongs to the 2.4G wireless communication open source frequency band, and this frequency band is a globally open and common frequency band, that is, various wireless electronic products can use this frequency band to communicate, this has led to increasingly serious mutual interference problems in this frequency band, communication The stability and transmission distance are greatly affected. In addition, the communication standard in the 2.4G frequency band has poor wall penetration effect, which makes it impossible for IoT devices to upload data in time.

Utility model content

The utility model provides a dual-mode communication module and an intelligent gas meter, which are used to solve the problems in the prior art that the dual-mode communication module does not upload data in a timely manner and has poor transmission through walls.

In a first aspect, the utility model provides a dual-mode communication module, including: a power control circuit, and an NB-IoT communication standard module and a SUB-G communication standard module respectively connected to the power control circuit;

The NB-IoT communication standard module includes a master microprocessor, which is connected to the slave microprocessor in the SUB-G communication standard module, and is used to receive data to be uploaded and determine to use the SUB-G communication standard module. When the G communication standard module transmits data, the power control circuit is triggered to supply power to the SUB-G communication standard module, and the data to be uploaded is sent to the slave microprocessor;

The SUB-G communication standard module also includes: a radio frequency transceiver device that converts the data to be uploaded from a digital signal form into an analog signal form, and a first device that transmits the data to be uploaded in the form of an analog signal to an external device. antenna.

In a preferred specific implementation, the main microprocessor in the NB-IoT communication standard module is also used to determine that the NB-IoT communication standard module is used for data transmission. The standard module also includes: a radio frequency device for converting the data to be uploaded from a digital signal form to an analog signal form, a radio frequency switch circuit for selecting the communication frequency band required for uploading the data to be uploaded, and a radio frequency switch circuit for converting all data to be uploaded. The data to be uploaded in the form of the analog signal is transmitted to the second antenna of the external device according to the required communication frequency band.

In a preferred specific implementation, the SUB-G communication standard module further includes: a first crystal oscillator used to generate a first clock signal for the SUB-G communication standard module in different working states;

Wherein, the working state includes: sleep state and wake-up state.

In a preferred specific implementation, the slave microprocessor includes: a first serial bus port connected to the master microprocessor and used to receive the data to be uploaded, and a first serial bus port connected to the radio frequency transceiver. The device is connected to a communication bus port for sending the data to be uploaded, a first crystal oscillator input/output port for receiving the first clock signal, and a first crystal oscillator input/output port for receiving the first crystal oscillator. The power control circuit inputs the first input power voltage to the first input power port.

In a preferred specific implementation, the radio frequency transceiver device includes: a first communication port connected to the first antenna and used to receive the data to be uploaded in the form of the analog signal.

In a preferred specific implementation, the NB-IoT communication standard module also includes: a USIM circuit for providing network registration when the NB-IoT communication standard module performs data transmission, and a USIM circuit for all The NB-IoT communication standard module generates a second crystal oscillator for the second clock signal under different working states;

Wherein, the working state includes: sleep state and wake-up state.

In a preferred specific implementation, the master microprocessor includes: a second serial bus port connected to the slave microprocessor and used to send the data to be uploaded, and the USIM circuit A second communication port is connected to the second crystal oscillator and is used to receive the second clock signal. A second crystal oscillator input/output port is connected to the radio frequency device and is used to send the data to be uploaded. a third communication port, and a second input power port for receiving a second input power voltage provided by the power control circuit.

In a preferred specific implementation, the radio frequency device includes: a fourth communication port connected to the radio frequency switch circuit and used to receive the communication frequency band required for the data to be uploaded;

Correspondingly, the radio frequency switch circuit includes: a fifth communication port connected to the second antenna and used for receiving the data to be uploaded in the form of the analog signal.

In a preferred specific implementation, the first antenna or the second antenna includes: a first capacitor for filtering, a resistor for current limiting connected to the first capacitor, and a resistor connected to the first capacitor for current limiting. a second capacitor for filtering connected to the resistor;

Wherein, one end of the first capacitor is connected to the first communication port or the fifth communication port, the other end of the first capacitor is connected to ground, and one end of the second capacitor is connected to one end of the resistor. , the other ends of the second capacitor and the resistor are both grounded.

In a preferred embodiment, the power control circuit includes: a third input power voltage, a third input power port for receiving the third input power voltage, and a third input power port for controlling the operation of the power control circuit. operating voltage.

In a second aspect, the present invention provides a smart gas meter, including the dual-mode communication module as described in the previous item.

The utility model provides a dual-mode communication module and a smart gas meter. The dual-mode communication module includes a power control circuit, and an NB-IoT communication standard module and a SUB-G communication standard that are respectively connected to the power control circuit. Module; the NB-IoT communication standard module includes a main microprocessor, which is connected to the slave microprocessor in the SUB-G communication standard module, and is used to receive the data to be uploaded and determine to use the When the SUB-G communication standard module transmits data, the power control circuit is triggered to supply power to the SUB-G communication standard module, and the data to be uploaded is sent to the slave microprocessor; The SUB-G communication standard module also includes: a radio frequency transceiver device that converts the data to be uploaded from a digital signal form into an analog signal form, and a first antenna that transmits the data to be uploaded in the form of an analog signal to an external device. Compared with the existing technology, using the dual-mode communication module provided by the present utility model, when the main microprocessor determines that the NB-IoT communication standard module that relies on the network for data transmission cannot perform data upload processing, the main microprocessor The relevant devices of the NB-IoT communication standard module will be disconnected and the SUB-G communication standard module connected to it will be connected, that is, the local communication standard module will be used for communication, and the frequency used by the Sub-G communication standard module is Below 1GHz, generally 27MHz~960MHz, this frequency band can be regarded as an ideal choice for long-distance and low-power communication. Compared with the 2.4GHz frequency band used by existing local communication standard modules, Sub-G communication standard modules have obvious advantages, including longer transmission range, strong anti-interference, and better wall penetration capabilities.

Description of the drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

Figure 1 is a schematic structural diagram of Embodiment 1 of a dual-mode communication module provided by the present invention;

Figure 2 is a schematic structural diagram of Embodiment 2 of a dual-mode communication module provided by the present utility model;

Figure 3 is a schematic structural diagram of a third embodiment of a dual-mode communication module provided by the present invention;

Figure 4 is a schematic structural diagram of Embodiment 4 of a dual-mode communication module provided by the present invention;

Figure 5 is a schematic structural diagram of Embodiment 5 of a dual-mode communication module provided by the present invention;

Figure 6 is a schematic structural diagram of Embodiment 6 of a dual-mode communication module provided by the present invention;

Figure 7 is a schematic structural diagram of Embodiment 7 of a dual-mode communication module provided by the present invention;

Figure 8 is a schematic structural diagram of Embodiment 8 of a dual-mode communication module provided by the present invention;

Figure 9 is a schematic structural diagram of a ninth embodiment of a dual-mode communication module provided by the present invention;

Figure 10 is a schematic structural diagram of a tenth embodiment of a dual-mode communication module provided by the present invention.

Reference signs:

1: Dual-mode communication module;

10: Power control circuit;

20: NB-IoT communication standard module;

30: SUB-G communication standard module;

201: Main microprocessor;

202: Radio frequency devices;

203: RF switch circuit;

204: USIM circuit;

205: Second antenna;

N2: second crystal oscillator;

n2: second clock signal;

301: from microprocessor;

302: Radio frequency transceiver device;

303: First antenna;

N1: the first crystal oscillator;

n1: first clock signal;

C2: first capacitor;

C3: second capacitor;

R1: Resistor;

power1: first input power supply voltage;

power2: second input power supply voltage;

power3: third input power supply voltage;

D1: first communication port;

D2: Second communication port;

D3: The third communication port;

D4: The fourth communication port;

D5: fifth communication port;

SPI: communication bus port;

USART: first serial bus port;

USART1: Second serial bus port;

vcc1: the first input power port;

vcc2: Second input power port;

vcc3: The third input power port;

vdd: working voltage;

X1: The first crystal oscillator input/output port;

X2: The second crystal oscillator input/output port;

GND: Ground.

Detailed ways

First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

Secondly, it should be noted that in the description of the embodiments of the present invention, the terms "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the purpose of It is for convenience of description, but it does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

In addition, it should be noted that in the description of the embodiments of the present invention, unless otherwise clearly stated and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a fixed connection. Detachable connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

Furthermore, it should be noted that the "front end", "back end", "one end" and "other end" in the description of this embodiment are only used to distinguish the two ends of the wire harness. When one of the endpoints is defined as " "front end" or "rear end", correspondingly, the other end is defined as "rear end" or "front end". The same understanding can be used for "one end" and "the other end". This utility model uses the left side of the wire harness The direction is taken as the front end and the right direction of the wire harness is taken as the rear end as an example, but this is not limited.

In order to make the purpose, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the description The embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

With the popularization of smart IoT devices and the development of narrow-bandwidth IoT, smart IoT devices can rely on operator networks to work, such as smart gas meters, water meters, etc. They can periodically or in real time upload user usage data to the corresponding Cloud platforms, such as management platforms, eliminate the need for technicians to manually read meters and count, which greatly facilitates users. How to upload data from smart IoT devices to the cloud platform accurately and in real time has become a research topic for technicians in this field. Hotspot.

In the existing technology, narrow-bandwidth IoT chips NB-IoT are usually installed in smart IoT devices to implement data reporting and processing using the operator's network. However, due to factors such as the operator's network environment, cell capacity, and concurrency, As a result, smart IoT devices may be unable to report their own data to the cloud platform for a long time. Based on this, those skilled in the art have encapsulated another chip BLE for data transmission through local communication links at the NB-IoT of the smart Internet of Things device, so that the data can be uploaded to the centralized collector, and then the data can be uploaded to the centralized collector. The collector uploads the data to the cloud.

However, the communication frequency band of BLE used in the existing technology to assist intelligent Internet of Things data uploading belongs to the 2.4G wireless communication open source frequency band. What we know is that 2.4GHz wireless communication is for open source use and is a globally public wireless frequency band. Various wireless products can use this frequency band, such as WiFi in offices or homes, various wireless Bluetooth devices, and even kitchen appliances. Microwave oven etc. As the number of applications of these wireless products increases, when multiple wireless devices are used simultaneously within a certain range, mutual interference problems will occur in the 2.4G frequency band, and the stability of communication and transmission distance will be greatly affected. On the other hand, due to the poor wall penetration effect of the communication standard in the 2.4G frequency band, it is difficult or impossible to upload data to the cloud when smart IoT devices are set up in closed spaces, such as cabinets or basements in many homes. Upload data to the cloud in a timely manner.

Based on the above technical problems, the concept of the present utility model is: how to realize a dual-mode communication module with strong wall penetration effect, high efficiency and timely uploading of data.

The principles and features of the embodiments of the present utility model are described below with reference to the accompanying drawings. The examples cited are only used to explain the embodiments of the present utility model and are not intended to limit the scope of the embodiments of the present utility model.

Below, the embodiments of the present invention will be described in detail through specific examples. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

Figure 1 is a schematic structural diagram of Embodiment 1 of a dual-mode communication module provided by the present invention. As shown in Figure 1, the dual-mode communication module 1 includes: a power control circuit 10, an NB-IoT communication standard module 20 and a SUB-G communication standard module 30 respectively connected to the power control circuit 10. Among them, the NB-IoT communication standard module 20 includes a main microprocessor 201, and the main microprocessor 201 is connected to the slave microprocessor 301 in the SUB-G communication standard module 30 for receiving the to-be-received data. When data is uploaded and it is determined that the SUB-G communication standard module 30 is used for data transmission, the power control circuit 10 is triggered to supply power to the SUB-G communication standard module 30 and the data to be uploaded is sent to the slave microprocessor 301 .

In addition, the SUB-G communication standard module 30 includes: a radio frequency transceiver device 302 that converts the data to be uploaded from a digital signal form into an analog signal form, and a first antenna 303 that transmits the data to be uploaded in the form of an analog signal to an external device.

It should be noted that the dual-mode communication module provided by the present utility model can be integrated on a printed circuit board (PCB), and the printed circuit board can be installed on smart Internet of Things devices, such as smart gas meters. But it is not limited to other specific implementation methods.

In this embodiment, the power control circuit 10 is used to power the dual-mode communication module of this embodiment, and is mainly responsible for powering the main microprocessor 201, and then the main microprocessor 201 supplies power to the dual-mode communication module. The relevant components of the NB-IoT communication standard module 20 and the SUB-G communication standard module 30 are powered on and controlled.

What is conceivable is that current smart IoT devices can upload their own data to external devices, such as cloud platforms, according to preset cycles or in real time. They can also upload their own data to external devices after receiving instructions to upload data. In the cloud platform or centralized collector. Among them, the own data is the data to be uploaded.

Optionally, the main microprocessor 201 can feedback a signal to the main microprocessor 201 based on whether the current smart IoT device successfully reports data, that is, when the smart IoT device uploads data successfully, the signal is used for labeling. Whether the data is uploaded successfully, for example, a signal value of 1 indicates a successful data upload status, and a signal value of 0 indicates an unsuccessful data upload status.

For example, assuming that the communication standard module currently used to upload data is the NB-IoT communication standard module 20, the main microprocessor 201 determines whether the NB-IoT communication standard module 20 or the SUB-IoT communication standard module 20 should be used based on the received signal. G communication standard module 30, if the received signal value is 1, it is judged that the currently adopted communication module is NB-IoT communication standard module 20 successfully uploads data, and then the main microprocessor 201 continues to control the intelligent Internet of Things device to use the The module uploads data. If the received signal value is 0, it is judged that the currently adopted communication module is the NB-IoT communication standard module. If the data upload is unsuccessful, the main microprocessor 201 will control the intelligent Internet of Things device to adopt the SUB-G communication standard module. 30 Perform data upload processing.

When the main microprocessor 201 finds that the NB-IoT communication standard module 20 cannot upload data, it immediately uses the SUB-G communication standard module 30 to perform data upload processing. At this time, the main microprocessor 201 controls the power control circuit to be SUB- The G communication standard module 30 supplies power and sends the data to be uploaded to the slave microprocessor 301 of the SUB-G communication standard module 30 .

Correspondingly, after receiving the data to be uploaded from the microprocessor 301, the data to be uploaded is sent to the radio frequency transceiver device 302 connected thereto, and the radio frequency transceiver device 302 is triggered to convert the data form of the data to be uploaded into a sendable data form. , optionally, generally the data generated inside the smart IoT device is in the form of digital signals, and after being processed by the radio frequency transceiver device 302, the data to be uploaded in the form of digital signals can be converted into the data to be uploaded in the form of analog signals. In order to send the data, that is, the microprocessor 301 can trigger the first antenna 303 to send the data to be uploaded in the form of an analog signal to an external device to implement data upload processing.

Then, the slave microprocessor 301 receives the feedback signal of the uploaded data sent by the external device from the first antenna 303, uses the radio frequency transceiver device 302 to convert the feedback signal in the form of an analog signal into a feedback signal in the form of a digital signal, and converts the digital signal into a feedback signal. The feedback signal in the form of a signal is sent to the main microprocessor 201 in order to confirm the communication mode module used to upload data next time.

In an optional embodiment, the radio frequency transceiver device 302 integrates a transmitter, a receiver, a modem and a baseband processing device. Among them, transmitters and receivers can be used for interactive data processing with external devices, and modems and baseband processing devices are mainly used for conversion processing of digital signals and analog signal forms.

In this embodiment, the structure of a dual-mode communication module is specifically explained. The dual-mode communication module 1 includes: a source control circuit 10, and an NB-IoT communication standard module 20 and NB-IoT communication module 20 connected to the power control circuit respectively. SUB-G communication standard module 30; wherein, the NB-IoT communication standard module 20 includes a master microprocessor 201, which is connected to the slave microprocessor 301 in the SUB-G communication standard module 30, for receiving When data is to be uploaded and it is determined to use the SUB-G communication standard module 30 for data transmission, the power control circuit 10 is triggered to supply power to the SUB-G communication standard module 30 and the data to be uploaded is sent to the slave microprocessor 301; Correspondingly, the SUB-G communication standard module 30 also includes: a radio frequency transceiver device 302 that converts the data to be uploaded from a digital signal form to an analog signal form, and a first antenna that transmits the data to be uploaded in the form of an analog signal to an external device. 303. Compared with the existing technology, this embodiment adopts a combination of the SUB-G communication standard module 30 and the NB-IoT communication standard module 20 to realize a dual-mode communication module. In this embodiment, the hardware devices corresponding to the NB-IoT communication standard and the SUB-G communication standard can be controlled in an independent operation mode, and the main microprocessor 201 controls the intelligent IoT device using a certain communication standard module. During communication, the hardware corresponding to the communication standard module will be controlled to start, and at the same time, the hardware corresponding to the other communication standard module will be controlled to be in a power-off state, thereby reducing the power consumption of the dual-mode communication module; in addition, this The local communication standard module SUB-G communication standard module 30 provided by the embodiment can resist interference from wireless electronic devices around the smart Internet of Things device when communicating, and based on the characteristics of SUB-G itself, has a wall penetration effect when using local communication Better, thus improving the data transmission efficiency, timeliness and anti-interference ability of the dual-mode communication module.

The NB-IoT communication standard module 20 in the dual-mode communication module 1 will be further explained below through Figure 2. Figure 2 is a schematic structural diagram of the second embodiment of a dual-mode communication module provided by the present invention. As shown in Figure 2, the NB-IoT communication standard module 20 includes:

The radio frequency device 202 used to convert the data to be uploaded from the digital signal form to the analog signal form, the radio frequency switch circuit 203 used to select the communication frequency band required for uploading the data to be uploaded, and the data to be uploaded in the form of analog signals, according to The desired communication band is transmitted to the second antenna 205 of the external device.

In this embodiment, when the main microprocessor 201 in the NB-IoT communication standard module 20 determines to use the NB-IoT communication standard module 20 for data transmission, the main microprocessor 201 will send the data to be uploaded to the radio frequency device 202, and use the radio frequency device 202 to convert the digital signal form of the data to be uploaded into a sendable analog signal form. Optionally, the radio frequency device 202 is also integrated with radio frequency devices such as a transmitter, a receiver, a modem, and a filter, and the uses of these devices are similar to those of the radio frequency transceiver device 302, and will not be repeated here.

Then, the main microprocessor 201 triggers the second antenna 205 to send the data to be uploaded in the form of analog signals to the external device, and then receives the upload data feedback signal from the external device within a preset time to determine the next time The communication mode module used to upload data.

In this embodiment, the specific structure of the NB-IoT communication standard module 20 and the data interaction process of the NB-IoT communication standard module 20 when uploading data are specifically described. Compared with the existing technology, the dual-mode communication module provided in this embodiment can use the NB-IoT communication standard module 20 for data transmission when the communication network is in good condition to achieve the effect of quickly uploading data.

The structure of the SUB-G communication standard module 30 in the dual-mode communication module 1 will be explained in detail below through FIG. 3 for further description. Figure 3 is a schematic structural diagram of the third embodiment of a dual-mode communication module provided by the present invention. As shown in Figure 3, the SUB-G communication mode module 30 includes:

The first crystal oscillator N1 is used to generate the first clock signal n1 for the SUB-G communication mode module 30 in different working states; where the working states include: sleep state and wake-up state.

In this embodiment, considering that smart Internet of Things devices require a clock signal for triggering when performing data communication, the SUB-G communication standard module 30 also includes a third clock signal n1 for generating the first clock signal n1 in different working states. One crystal oscillator N1, based on the inconsistent working power consumption of smart IoT devices in different working states, different clock signals can be used in different working states.

Optionally, the first crystal oscillator N1 can be a 32K crystal oscillator or a 26M crystal oscillator, and when the SUB-G communication standard module 30 is in the wake-up state, the 26M crystal oscillator is used to generate a clock signal from the microprocessor 301; when the SUB-G communication standard module 30 30 uses a 32K crystal oscillator to generate a clock signal from the microprocessor 301 in the sleep state.

The structure of the slave microprocessor 301 in the dual-mode communication module 1 will be further described below through FIG. 4 . Figure 4 is a schematic structural diagram of Embodiment 4 of a dual-mode communication module provided by the present invention. As shown in Figure 4, the slave microprocessor 301 includes:

The first serial bus port USART is connected to the main microprocessor 201 and is used to receive data to be uploaded. The communication bus port SPI is connected to the radio frequency transceiver device 302 and is used to send data to be uploaded. It is connected to the first crystal oscillator N1 The first crystal oscillator input/output port X1 is connected and used to receive the first clock signal n1, and the first input power port vcc1 is used to receive the first input power supply voltage power1 input from the power control circuit 10.

In this embodiment, the slave microprocessor 301 is the main control device of the SUB-G communication mode module 30, but as a slave control center, the slave microprocessor 301 is controlled by the master microprocessor 201, which can be understood as: The working mode of the dual-mode communication module provided in this embodiment is controlled by the main microprocessor 201 .

Corresponding to the connection structure of the slave microprocessor 301, the slave microprocessor 301 should have a first serial bus port USART connected to the master microprocessor 201. Through the first serial bus port, the slave microprocessor 301 can Obtain communication data sent from the main microprocessor 201, such as data to be uploaded and instruction information, etc.

After receiving the data to be uploaded from the microprocessor 301, the data to be uploaded will be sent to the radio frequency transceiver device 302 for processing. Optionally, the microprocessor 301 will send the data to be uploaded to the radio frequency transceiver device through the communication bus port SPI. 302. Trigger the radio frequency transceiver device 302 to convert the signal form of the data to be uploaded, that is, convert the data to be uploaded in the form of a digital signal into the data to be uploaded in the form of an analog signal, and then pass the data to be uploaded in the form of an analog signal through the first antenna. 303 is sent.

In addition, the slave microprocessor 301 also has a first crystal oscillator input/output port X1 for connecting to the first crystal oscillator N1 so as to receive the first clock signal n1 provided by the first crystal oscillator N1.

It is conceivable that in this embodiment, when the slave microprocessor 301 does not receive the data to be uploaded sent by the master microprocessor 201, that is, when the SUB-G communication mode module is in the sleep state, the slave microprocessor 301 The received first clock signal n1 is provided by a 32K crystal oscillator. When the slave microprocessor 301 receives the data to be uploaded from the main microprocessor 201, that is, when the SUB-G communication mode module is in the awake state, the first clock signal n1 received from the microprocessor 301 is provided by a 26M crystal oscillator. of.

Optionally, the working mechanism of the SUB-G communication standard module 30 can also be: when the main microprocessor 201 determines that the NB-IoT communication standard module 20 is currently used, the main microprocessor 201 can control the power control circuit 10 to pair the SUB The -G communication standard module 30 undergoes power-down processing. At this time, all components of the SUB-G communication standard module 30 are in a power-down state.

It is worth mentioning that the SUB-G communication standard module requires the power supply control circuit 10 to provide power so that all its components can be turned on for data transmission processing according to the provided power. Correspondingly, when the main microprocessor 201 determines to use the SUB-G communication standard module 30 for data transmission, the first input from the power control circuit 10 can be received from the first input power port vcc1 on the microprocessor 301 Power supply voltage power1.

In this embodiment, the connection structure between the microprocessor 301 and other devices in the SUB-G communication standard module 30 is specifically explained, and the working principle based on this connection structure, the dual-mode communication module 1 can utilize local communication The data to be uploaded is uploaded to an external device in this way, and the communication frequency band used by the SUB-G communication standard module 30 is less than 1GHZ, so that the data uploading process can avoid interference from other wireless electronic devices, so that data can be uploaded in a timely and efficient manner. It can also achieve good wall penetration effect in a closed environment.

The structure of the radio frequency transceiver device 302 in the dual-mode communication module 1 will be further described below through FIG. 5 . Figure 5 is a schematic structural diagram of the fifth embodiment of a dual-mode communication module provided by the present invention. As shown in Figure 5, the radio frequency transceiver device 302 includes:

The first communication port D1 is connected to the first antenna 303 and is used to receive data to be uploaded in the form of analog signals.

In this embodiment, after the radio frequency transceiver device 302 converts the data to be uploaded into digital signals and analog signals, the converted data to be uploaded is transmitted to the first antenna 303 through the first communication port D1 inside the device. at, and then the first antenna 303 uploads the converted data to be uploaded to the external device.

The structure of the NB-IoT communication standard module 20 in the dual-mode communication module 1 will be further described below through FIG. 6 . Figure 6 is a schematic structural diagram of Embodiment 6 of a dual-mode communication module provided by the present invention. As shown in Figure 6, the NB-IoT communication standard module 20 also includes:

The USIM circuit 204 is used to provide network registration when the NB-IoT communication standard module 20 performs data transmission, and the second crystal oscillator is used to generate the second clock signal n2 for the NB-IoT communication standard module 20 in different working states. N2; Among them, the working state includes: sleep state and wake-up state.

In this embodiment, the way the NB-IoT communication standard module 20 uploads data mainly relies on the frequency band of the communication network, and the communication network will perform network registration processing on the communication network after the smart IoT device is powered on, so that the NB -The IoT communication standard module 20 has a network capable of uploading data to be uploaded.

Correspondingly, the NB-IoT communication standard module 20 should also include a USIM circuit 204 for network registration.

Considering that the NB-IoT communication standard module 20 also needs to trigger a clock signal when performing data transmission and other data processing work, therefore, the NB-IoT communication standard module 20 also includes a device for generating a second clock signal. The second crystal oscillator N2 of n2.

Optionally, the second crystal oscillator N2 includes: a 32K crystal oscillator and a 26M crystal oscillator, and the working principles of the 32K crystal oscillator and the 26M crystal oscillator are similar to the aforementioned first crystal oscillator N1, and will not be repeated here.

It is worth mentioning that the crystal oscillators used in the NB-IoT communication standard module 20 and the SUB-G communication standard module 30 can be the same crystal oscillator, or they can be different crystal oscillators.

For example, when the smart Internet of Things device uses the NB-IoT communication standard module 20 for work processing, the first crystal oscillator N1 can start the 26M crystal oscillator, while the second crystal oscillator N2 of the SUB-G communication standard module 30 can not start or start. 32K crystal oscillator; when the smart IoT device is only in standby mode, at this time, the first crystal oscillator N1 and the second crystal oscillator N2 can use 32K crystal oscillator at the same time to maintain the working requirements of the smart IoT device.

This embodiment is based on the second real-time example and further explains the specific connection structure of the NB-IoT communication standard module 20 and the working mechanism of each device under this connection structure.

The structure of the main microprocessor 201 in the dual-mode communication module 1 will be further described below through FIG. 7 . Figure 7 is a schematic structural diagram of Embodiment 7 of a dual-mode communication module provided by the present invention. As shown in Figure 7, the main microprocessor 201 includes:

The second serial bus port USART1 is connected to the slave microprocessor 301 and is used to send data to be uploaded. The second communication port D2 is connected to the USIM circuit 204 and is connected to the second crystal oscillator N2 and is used to receive the second clock signal. The second crystal oscillator N2 input/output port X2 of n2 is connected to the radio frequency device 202 and is used to send the third communication port D3 of data to be uploaded, and is used to receive the second input power supply voltage power2 provided by the power control circuit 10 Second input power port vcc2.

In this embodiment, the master microprocessor 201 can communicate with the slave microprocessor 301 through its internal second serial bus port USART1, and the slave microprocessor 301 can be connected through the second serial bus port USART1. Send data and also receive data uploaded from the microprocessor 301.

In addition, the main microprocessor 201 also includes a second communication port D2 connected to the USIM circuit 204 for network registration. Prompt information on whether network registration is successful or not can be obtained through D2. After receiving the information on successful registration from D2, the main microprocessor 201 The microprocessor 201 can control the NB-IoT communication standard module 20 to perform data upload processing. After receiving the unsuccessful registration information transmitted by D2, the main microprocessor 201 needs to trigger the USIM circuit 204 to re-register the network. .

The main microprocessor 201 also includes a second crystal oscillator input/output port X2 for receiving the second crystal oscillator N2 to generate a second clock signal n2. When the main microprocessor 201 controls the NB-IoT communication standard module 20 to upload data , it can obtain the second clock signal generated by the 26M crystal oscillator for the wake-up state through the second crystal oscillator input/output port X2; when the main microprocessor 201 controls the SUB-G communication mode module 30 to upload data, it can The second crystal oscillator input/output port X2 obtains the second clock signal generated by the 32K crystal oscillator for the sleep state.

It should be noted that the real-time operating system ROST is stored in the main microprocessor to control the dual-mode communication module for data communication processing.

It is worth mentioning that the main microprocessor 201 should also have a power supply voltage for its own operation. Optionally, the main microprocessor 201 has a second input power port vcc2, through which it can receive the power supply provided by the power control circuit 10. The second input power supply voltage power2 is received, and upon receiving the second input power supply voltage power2, the USIM circuit 204, the radio frequency device 202 and the radio frequency switch circuit 203 are immediately turned on.

In this embodiment, the connection structure of the main microprocessor 201 in the NB-IoT communication standard module 20 and the working mechanism of its internal connection devices during data transmission are explained in detail.

The connection structure of the radio frequency device 202 in the dual-mode communication module 1 will be further described below through FIG. 8 . Figure 8 is a schematic structural diagram of Embodiment 8 of a dual-mode communication module provided by the present invention. As shown in Figure 8, the radio frequency device 202 includes:

The fourth communication port D4 is connected to the radio frequency switch circuit 203 and is used to receive the communication frequency band required for the data to be uploaded; accordingly, the radio frequency switch circuit 203 includes: connected to the second antenna 205, which is used to receive the data to be uploaded in the form of analog signals. The fifth communication port D5 for uploading data.

In this embodiment, the radio frequency device 202 in the NB-IoT communication standard module 20 that is used to send and receive data and convert the sent and received data into digital signals and analog signals is connected to the radio frequency switch circuit 203 to facilitate the radio frequency device 202 to obtain To the communication frequency band required for sending and receiving data converted in signal form. Based on this, the radio frequency device 202 is provided with a fourth communication port D4 connected to the radio frequency switch circuit 203 inside, so as to obtain the communication frequency band required for communication through the fourth communication port D4.

Correspondingly, the radio frequency switch circuit 203 will also pass the communication frequency band required for communication to the second antenna 205, so that the communication data can be transmitted to the external device through the second antenna 205. And the radio frequency switch circuit 203 is internally provided with a fifth communication port D5 for connecting to the second antenna 205 and for passing the communication frequency band required for communication data to the second antenna 205, thereby completing data communication processing, such as data uploading. deal with.

This embodiment specifically explains the specific connection structure of the radio frequency device 202 in the NB-IoT communication standard module 20 and the internal connection structure of the radio frequency switch circuit 203. Based on this connection structure, communication processing of data can be realized.

The connection structure of the first antenna 303 and the second antenna 205 in the dual-mode communication module 1 will be further explained below through FIG. 9 . Figure 9 is a schematic structural diagram of Embodiment 9 of a dual-mode communication module provided by the present invention. As shown in Figure 9, the first antenna 303 and the second antenna 205 respectively include:

A first capacitor C2 for filtering, a resistor R1 for current limiting connected to the first capacitor C2, and a second capacitor C3 for filtering connected to the resistor R1; wherein one end of the first capacitor C2 is connected to the first capacitor C2 for current limiting. A communication port D1 or a fifth communication port D5 is connected, the other end of the first capacitor C2 is connected to the ground GND, one end of the second capacitor C3 is connected to one end of the resistor R1, and the other ends of the second capacitor C3 and the resistor R1 are both connected to the ground GND.

Among them, the first capacitor C2, the second capacitor C3 and the resistor R1 in the first antenna 303 and the second antenna 205 form a π-shaped circuit to eliminate noise, high-frequency clutter and other unnecessary electrons in the communication data. signal, thereby ensuring the quality of communication data.

When the NB-IoT communication standard module 20 performs data communication, the NB-IoT communication standard module 20 and the second antenna 205 are in a conductive state, while the first antenna 303 of the SUB-G communication standard module 30 is in a power-off state. ;Similarly, when the SUB-G communication standard module 30 performs data communication, the first antenna 303 is in a conductive state, while the second antenna 205 of the NB-IoT communication standard module 20 is powered off. Then, the main microprocessor 201 can implement time-sharing control to realize that the two communication standard modules can operate independently.

In this embodiment, it is specifically explained that the NB-IoT communication standard module 20 and the SUB-G communication standard module 30 respectively use their own antennas for data communication. Based on the structure of the dual-mode communication module, it can be seen that the NB-IoT communication The hardware link isolation scheme adopted by the standard module 20 and the SUB-G communication standard module essentially only activates the hardware link corresponding to one communication standard module at the same time, which fundamentally solves the dual-mode problem in the existing technology. Interference problem between communications.

The connection structure of the power control circuit 10 in the dual-mode communication module 1 will be further explained below through FIG. 10 . Figure 10 is a schematic structural diagram of a tenth embodiment of a dual-mode communication module provided by the present invention. As shown in Figure 10, the power control circuit 10 includes:

The third input power supply voltage power3 is used to receive the third input power supply port vcc3 of the third input power supply voltage power3, and the working voltage vdd is used to control the operation of the power control circuit.

When the smart Internet of Things device is powered on, after receiving the third input power supply voltage power3 from the external device, the power control circuit 10 will immediately convert the third input power supply voltage power3 into a working voltage vdd suitable for its own work, and convert the working voltage vdd Input to the main microprocessor 201 or the slave microprocessor 301, that is, the operating voltage vdd is used as the second input power supply voltage power2 of the main microprocessor 201, or as the first input power supply voltage power1 of the slave microprocessor 301, thereby enabling power on The subsequent main microprocessor 201 or slave microprocessor 301 performs data upload processing.

It can be understood that the power control circuit 10 serves as an energy provider when the dual-mode communication module 1 is working and processing, and the third input power supply voltage power3 can be an access power source or an energy source provided by a battery. These power sources are passed through the power control circuit After the components inside 10 are lost, a voltage will be formed to maintain the working voltage of the power control circuit 10 or the voltage that the power control circuit 10 continuously outputs.

Based on this, the introduction to the internal device connection structure of the dual-mode communication mode is completed.

In summary, it can be seen that the SUB-G communication standard module 30, that is, the power consumption of the SUB-G communication standard module 30 is very low, because the communication module hardware links of the solution of the present utility model are very simple, and the control link It has extremely short response time and fast response time, so it can quickly sleep after the data communication task is completed to achieve the ultimate power consumption.

Compared with the existing technology, for the common structure of two sets of hardware starting NB-IoT communication standard module and BLE communication standard module at the same time, the design scheme of switching different modes through software and hardware links can be used when BLE communication is required. In the scenario where the standard is used, the software and hardware links of the NB-IoT communication standard are actually used. This link is relatively large, the software and hardware respond slowly, the sleep and wake-up time is long, and it has high sleep current and power consumption performance. Poor. When the Sub-G communication standard module is required to be used, the utility model closes the NB-IoT communication standard communication link and relies on its main microprocessor to start the Sub-G communication standard module software and hardware control link, and the software and hardware The control link and response time are small, thus achieving extremely low power consumption. Similarly, when the NB-IoT communication standard module is started alone, since there is no interference from the Sub-G communication standard functional system, it is also equivalent to A single NB-IoT communication standard module, so the power consumption is also optimized. In addition, the Sub-G communication standard module used in this utility model can achieve better wall penetration effect due to its own advantages, so it can achieve the technical effect of timely and effective data uploading.

It is worth mentioning that the NB-IoT communication standard module 20 and the Sub-G communication standard module 30 can select the default startup mode through hardware. In actual use, users can choose to use local communication or remote communication by default according to product needs, so as to achieve the optimal effect of the product.

The utility model also provides an intelligent gas meter, which includes the dual-mode communication module mentioned in the previous embodiment.

It should be noted that the above optional embodiments are only examples provided by the present invention, but the dual-mode communication module provided by the present invention can be applied to any device with Internet of Things functions.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that : It is still possible to modify the technical solutions recorded in the foregoing embodiments, or to equivalently replace some or all of the technical features; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the embodiments of the present utility model. Scope of technical solutions.

Claims (11)

1. A dual-mode communication module, comprising: the power supply control circuit is connected with the NB-IoT communication system module and the SUB-G communication system module respectively;

the NB-IoT communication system module comprises a master microprocessor, is connected with a slave microprocessor in the SUB-G communication system module, and is used for triggering the power control circuit to supply power to the SUB-G communication system module and transmitting the data to be uploaded to the slave microprocessor when receiving the data to be uploaded and determining to transmit the data by adopting the SUB-G communication system module;

the SUB-G communication system module further includes: the radio frequency transceiver device is used for converting the data to be uploaded from a digital signal form into an analog signal form, and the first antenna is used for transmitting the data to be uploaded in the analog signal form to the external equipment.

2. The dual-mode communication module of claim 1, wherein the master microprocessor in the NB-IoT communication format module is further configured to determine to employ the NB-IoT communication format module for data transmission, the NB-IoT communication format module further comprising: the wireless communication device comprises a radio frequency device for converting the data to be uploaded from a digital signal form to an analog signal form, a radio frequency switch circuit for selecting a communication frequency band required by uploading the data to be uploaded, and a second antenna for transmitting the data to be uploaded in the analog signal form to the external device according to the required communication frequency band.

3. The dual-mode communication module of claim 2, wherein the SUB-G communication system module further comprises: the first crystal oscillator is used for generating a first clock signal for the SUB-G communication system module under different working states;

wherein, the operating condition includes: sleep state and awake state.

4. The dual-mode communication module of claim 3, wherein the slave microprocessor comprises: the first serial bus port is connected with the main microprocessor and used for receiving the data to be uploaded, the communication bus port is connected with the radio frequency transceiver and used for sending the data to be uploaded, the first crystal oscillator input/output port is connected with the first crystal oscillator and used for receiving the first clock signal n1, and the first input power supply port is used for receiving the first input power supply voltage input by the power supply control circuit.

5. The dual-mode communication module of claim 4, wherein the radio frequency transceiver device comprises: and the first communication port is connected with the first antenna and is used for receiving data to be uploaded in the form of the analog signal.

6. The dual-mode communication module of claim 5, wherein the NB-IoT communication format module further comprises: the USIM circuit is used for providing network registration when the NB-IoT communication system module carries out data transmission, and the second crystal oscillator is used for generating a second clock signal for the NB-IoT communication system module in different working states;

Wherein, the operating condition includes: sleep state and awake state.

7. The dual-mode communication module of claim 6, wherein the main microprocessor comprises: the second serial bus port is connected with the slave microprocessor and used for sending the data to be uploaded, the second communication port is connected with the USIM circuit, the second crystal oscillator input/output port is connected with the second crystal oscillator and used for receiving the second clock signal, the third communication port is connected with the radio frequency device and used for sending the data to be uploaded, and the second input power supply port is used for receiving the second input power supply voltage provided by the power supply control circuit.

8. The dual-mode communication module of claim 7, wherein the radio frequency device comprises: a fourth communication port connected with the radio frequency switch circuit and used for receiving the communication frequency band required by the data to be uploaded;

correspondingly, the radio frequency switching circuit comprises: and the fifth communication port is connected with the second antenna and is used for receiving the data to be uploaded in the form of the analog signal.

9. The dual-mode communication module of claim 8, wherein the first antenna or the second antenna comprises: a first capacitor for filtering, a resistor connected with the first capacitor for limiting current, and a second capacitor connected with the resistor for filtering;

One end of the first capacitor is connected with the first communication port or the fifth communication port, the other end of the first capacitor is grounded, one end of the second capacitor is connected with one end of the resistor, and the other ends of the second capacitor and the resistor are grounded.

10. The dual-mode communication module of claim 1 or 2, wherein the power control circuit comprises: the third input power supply voltage, a third input power supply port for receiving the third input power supply voltage, and a working voltage for controlling the power supply control circuit to work.

11. An intelligent gas meter comprising a dual-mode communication module according to any one of claims 1 to 10.