CN220107980U - Dual-mode communication module and Internet of things gas meter - Google Patents

Abstract

The utility model provides a dual-mode communication module and an Internet of things gas meter. The dual-mode communication module comprises: the power supply control circuit, the first communication system module and the second communication system module which are respectively connected with the power supply control circuit, the microprocessor which respectively controls the first communication system module and the second communication system module, and the antenna circuit and the crystal oscillator which are respectively connected with the microprocessor; wherein, first communication system module includes: a radio frequency device and a radio frequency switch circuit connected with the radio frequency device; the second communication system module includes: a radio frequency transceiver circuit; correspondingly, the first communication system module adopts an NB-IoT communication system; the second communication system module adopts a BLE communication system; the microprocessor stores a first operating system corresponding to the NB-IoT communication scheme and a second operating system corresponding to the BLE communication scheme. The problem that the consumption power consumption of the dual-mode communication module is large in the prior art is solved.

Description

Dual-mode communication module and Internet of things gas meter

Technical Field

The utility model relates to the technical field of communication, in particular to a dual-mode communication module and an Internet of things gas meter.

Background

With the development of a narrowband internet of things chip (Narrow Band Internet of Things, NB-IoT), the internet of things device with the internet of things function can conduct data communication work through an operator network, such as an intelligent gas meter, a water meter and the like, can operate the network to upload own data to the cloud end so as to facilitate subsequent processing such as cost calculation.

At present, the transmission efficiency of an operator network is easy to be influenced by environmental factors of the Internet of things equipment, such as a basement and other environments, so that the communication process of the Internet of things equipment is blocked, and the Internet of things equipment is influenced to upload data to the cloud. In order to solve the technical problem, an NB-IOT chip is usually combined with a local communication chip, for example, the NB-IOT chip is combined with a bluetooth low energy chip (Bluetooth Low Energy, BLE), that is, the BLE chip and the NB-IOT chip are integrated in the same package, and an operating system corresponding to the NB-IOT chip is used as a main operating system for controlling the operating system corresponding to the BLE chip. That is, the microprocessor of the NB-IOT is used as the master controller, and the microprocessor of the BLE chip is used as the slave controller, and the slave controller is controlled by the master controller to implement data communication processing on the dual-mode communication module inside the whole package, for example, when the NB-IOT chip cannot upload data, the slave controller of the BLE chip is controlled to upload data processing, so as to solve the problem that the communication of the conventional NB-IOT chip is hindered by environmental factors.

However, when the NB-IoT and BLE two-chip combination method performs data communication, the NB-IoT chip needs to be in an operating state no matter whether the NB-IoT chip needs to perform data communication or not, which results in greater power consumption for performing data communication in the combination method.

Disclosure of Invention

The utility model provides a dual-mode communication module and an Internet of things gas meter, which are used for solving the problem of high power consumption of the dual-mode communication module in the prior art.

In a first aspect, the present utility model provides a dual-mode communication module, comprising: the power supply control circuit, the first communication system module and the second communication system module which are respectively connected with the power supply control circuit, the microprocessor which respectively controls the first communication system module and the second communication system module, and the antenna circuit and the crystal oscillator which are respectively connected with the microprocessor;

the first communication system module includes: a radio frequency device and a radio frequency switch circuit connected with the radio frequency device;

the second communication system module includes: a radio frequency transceiver circuit;

the first communication system module adopts an NB-IoT communication system; the second communication system module adopts a BLE communication system; the microprocessor stores a first operating system corresponding to the NB-IoT communication format and a second operating system corresponding to the BLE communication format.

In a preferred embodiment, the radio frequency transceiver circuit comprises: the radio frequency transceiver is used for protecting a first capacitor of the working voltage of the radio frequency transceiver, a bus port used for communicating with the microprocessor, a first power port used for receiving a first input power supply provided by the power supply control circuit and a first antenna port used for being connected with the antenna circuit;

one end of the first capacitor is grounded, and the other end of the first capacitor is connected with a port corresponding to a first working voltage in the radio frequency transceiver.

In a preferred embodiment, the radio frequency transceiver comprises: the device comprises a transmitter and a receiver, wherein the transmitter and the receiver are used for receiving communication data sent by the microprocessor and reporting data to external equipment, and a modem and a baseband processing device for carrying out digital signal and analog signal conversion processing on the communication data and the reporting data;

the external equipment is a cloud platform or a collector.

In a preferred embodiment, the microprocessor shared by the first communication system module and the second communication system module includes: the antenna circuit comprises a power control circuit, a first power port for receiving a first input power provided by the power control circuit, a second power port for receiving a second input power provided by the power control circuit, a first communication port for being connected with the radio frequency device, an input/output port for being connected with the crystal oscillator, and a second antenna port for being connected with the antenna circuit.

In a preferred embodiment, the power control circuit includes: the third input power supply is used for receiving a third power supply port of the third power supply and controlling a second working voltage of the power supply control circuit.

In a preferred embodiment, the radio frequency device comprises: a second communication port for connection with the radio frequency switching circuit, the radio frequency switching circuit comprising, in response: and a third communication port for connection with the antenna circuit.

In a preferred embodiment, the antenna circuit comprises: a second capacitor for filtering, a resistor connected with the second capacitor for limiting current and a third capacitor connected with the resistor for filtering;

one end of the second capacitor is connected with the first antenna port or the second antenna port, the other end of the second capacitor is connected with one end of the resistor, and the other ends of the third capacitor and the resistor are connected.

In a preferred embodiment, the crystal oscillator comprises: a 32K crystal oscillator for providing a sleep state clock signal to the microprocessor, and a 26M crystal oscillator for providing an awake state clock signal to the microprocessor.

In a preferred embodiment, the first communication system module further includes: a USIM circuit for registering the first communication system module;

the microprocessor further comprises: and a fourth communication port for connection with the USIM circuit.

In a preferred embodiment, under the first communication system module, the microprocessor is in a conducting state with the USIM circuit, the radio frequency device and the radio frequency switch circuit connected with the radio frequency device, and the microprocessor is in a disconnecting state with the radio frequency transceiver circuit.

In a preferred embodiment, under the second communication system module, the microprocessor is in an off state with the USIM circuit, the radio frequency device, and a radio frequency switch circuit connected with the radio frequency device, and the microprocessor is in an on state with the radio frequency transceiver circuit.

In a second aspect, the present utility model provides an internet of things gas meter, comprising: comprising a dual mode communication module as claimed in any preceding claim.

The utility model provides a dual-mode communication module and an Internet of things gas meter, wherein the dual-mode communication module comprises a power supply control circuit, a first communication system module and a second communication system module which are respectively connected with the power supply control circuit, a microprocessor which respectively controls the first communication system module and the second communication system module, and an antenna circuit and a crystal oscillator which are respectively connected with the microprocessor; wherein, first communication system module includes: a radio frequency device and a radio frequency switch circuit connected with the radio frequency device; the second communication system module includes: a radio frequency transceiver circuit; correspondingly, the first communication system module adopts an NB-IoT communication system; the second communication system module adopts a BLE communication system; the microprocessor stores a first operating system corresponding to the NB-IoT communication scheme and a second operating system corresponding to the BLE communication scheme. Compared with the prior art, by utilizing the dual-mode communication module provided by the utility model, the microprocessor can judge which communication mode is used for communication at present according to the communication conditions of two communication modes, and after the current communication mode is determined, the microprocessor conducts the current communication mode and performs power-down processing on the other communication mode so as to reduce the communication power consumption of the dual-mode communication module; in addition, the first communication system module and the second communication system module share the hardware links such as the microprocessor, the crystal oscillator, the antenna circuit and the like, so that time-sharing independent starting can be realized, and the power consumption of the dual-mode communication module can be saved.

Drawings

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

Fig. 1 is a schematic structural diagram of a dual-mode communication module according to a first embodiment of the present utility model:

fig. 2 is a schematic structural diagram of a dual-mode communication module according to a second embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a dual-mode communication module according to a third embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a dual-mode communication module according to a fourth embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a dual-mode communication module according to a fifth embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a dual-mode communication module according to a sixth embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a dual-mode communication module according to a seventh embodiment of the present utility model.

Reference numerals:

1: a dual mode communication module;

10: a power supply control circuit;

20: a first communication system module;

201: a radio frequency device;

202: a radio frequency switching circuit;

30: a second communication system module;

301: a radio frequency transceiver circuit;

3011: a radio frequency transceiver;

40: a microprocessor;

50: an antenna circuit;

60: a crystal oscillator;

70: a USIM circuit;

c1: a first capacitor;

c2: a second capacitor;

and C3: a third capacitor;

r1: a resistor;

power1: a first input power supply;

power2: a second input power supply;

power3: a third input power supply;

d1: a first communication port;

d2: a second communication port;

d3: a third communication port;

d4: a fourth communication port;

ANT1: a first antenna port;

ANT2: a second antenna port;

SPI: a bus port;

VCC1: a first power port;

VCC2: a second power port;

VCC3: a third power port;

VDD1: a first operating voltage;

VDD2: a second operating voltage;

xtal_out/xtal_in: an input/output port;

GND: and (5) grounding.

Detailed Description

First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model. Those skilled in the art can make adjustments as needed to suit a particular application.

Further, it should be noted that, in the description of the embodiments of the present utility model, terms such as directions or positional relationships indicated by the terms "inner", "outer", and the like are based on directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or the component must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, it should be noted that, in the description of the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two components. The specific meaning of the above terms in the embodiments of the present utility model can be understood by those skilled in the art according to the specific circumstances.

It should be noted that, in the description of the present embodiment, the terms "front end", "rear end", "one end" and "other end" are merely used to distinguish two ends of the wire harness, and when one of the end points is defined as the "front end" or the "rear end", the other end is defined as the "rear end" or the "front end", and the same understanding manner can be adopted for the "one end" and the "other end", and the present utility model uses the left direction of the wire harness as the front end and the right direction of the wire harness as the rear end as an example, but is not limited thereto.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Along with popularization of intelligent internet of things equipment and development of the narrow bandwidth internet of things, the intelligent internet of things equipment can work by means of an operator network, such as an intelligent gas meter, a water meter and the like, and user usage data can be periodically or timely uploaded to a corresponding cloud platform, such as a management platform, so that manual meter reading and counting processes of technicians are avoided, the users are greatly facilitated, and how to accurately upload the data of the intelligent internet of things equipment to the cloud platform in real time becomes a hotspot for research of technicians in the field.

In the prior art, a narrow bandwidth internet of things chip NB-IoT is generally set in the intelligent internet of things device to implement data reporting processing work by using an operator network, but due to the influence of factors such as an operator network environment, cell capacity, concurrency and the like, the intelligent internet of things device may not report own data to the cloud platform for a long time. Based on this, a person skilled in the art encapsulates another chip BLE for implementing data transmission with a local communication link at NB-IoT of the intelligent internet of things device, so as to upload the data into the centralized collector, which in turn can upload the data to the cloud.

However, in the prior art, the NB-IoT chip is used as a master control chip, and the BLE chip is used as a slave control chip, that is, the same operating system used by the NB-IoT chip and the BLE chip when performing data communication, that is, the operating system carried by the NB-IoT chip, and the BLE chip is controlled to perform data communication processing by the operating system and a microprocessor corresponding to the operating system. Because the operating system is excessively involved in the dormancy and awakening processes, if the operating system needs to awaken a device corresponding to the communication system module, and meanwhile, needs to sleep a device corresponding to another communication system module, the dormancy awakening time is longer, and the peak current is larger; and the dormancy current of each device bottom layer is based on the dormancy current of NB-IoT, the dormancy current is higher and the power consumption is larger, and when the BLE communication system module is used alone for data processing, the power consumption level of the BLE communication system module is far less than that of the BLE communication system module.

Based on the technical problems, the utility model is characterized in that: how to realize a dual-mode communication module with smaller power consumption and loss.

The principles and features of embodiments of the present utility model are described below with reference to the drawings, the examples are provided for the purpose of illustrating the embodiments of the present utility model and are not intended to limit the scope of the embodiments of the present utility model.

Fig. 1 is a schematic structural diagram of a dual-mode communication module according to an embodiment of the present utility model. As shown in fig. 1, the dual-mode communication module 1 includes:

the power supply control circuit 10, the first communication system module 20 and the second communication system module 30 respectively connected with the power supply control circuit 10, the microprocessor 40 respectively controlling the first communication system module 20 and the second communication system module 30, and the antenna circuit 50 and the crystal oscillator 60 respectively connected with the microprocessor 40. The first communication system module 20 includes: a radio frequency device 201 and a radio frequency switching circuit 202; the second communication system module 30 includes: a radio frequency transceiver circuit 301; the first communication system module 20 may be an NB-IoT communication system, the second communication system module 30 may be a BLE communication system, and the microprocessor 40 stores a first operating system corresponding to the NB-IoT communication system and a second operating system corresponding to the BLE communication system.

It should be noted that the dual-mode communication module provided by the utility model can be integrated on a printed circuit board (Printed Circuit Board, PCB), and the printed circuit board can be arranged on intelligent internet of things equipment, such as an internet of things gas meter, but is not limited to other specific implementation modes.

In this embodiment, the power control circuit 10 is used for supplying power to the dual-mode communication module of this embodiment, and is mainly responsible for supplying power to the microprocessor 40, and then the microprocessor 40 performs power supply control on the first communication system module 20, the second communication system module 30, the antenna circuit 50 and the crystal oscillator 60 in the dual-mode communication module.

Correspondingly, the first communication system module 20 may adopt an NB-IoT communication system module, that is, the first communication system module is a communication system for uploading data based on an operator network, and the radio frequency device 201 in the first communication system module 20 is used for receiving and transmitting communication data, and when the radio frequency device 201 performs data receiving and transmitting processing, the radio frequency switch circuit 202 needs to perform selection processing of a communication channel to determine a communication network used in current data communication processing; similarly, the second communication system module 30 may be a BLE communication system module, that is, the second communication system module 30 is used for local communication, that is, when the communication network state of the first communication system module 20 is not good, the second communication system module 30 is used as an alternative communication module of the intelligent internet of things device. Specifically, the second communication system module 30 includes a radio frequency transceiver circuit 301 for receiving and transmitting communication data.

It should be noted that the alternative communication module mentioned in this embodiment may be either the first communication system module 20 or the second communication system module 30, which is specific to the communication system module used by the intelligent internet of things device, and this embodiment is not limited in particular.

Optionally, based on the working principle that the first communication system module 20 uses the operator network to upload data, the embodiment may use the first communication system module 20 as a default communication system module for uploading data after the intelligent internet of things device is started. The second communication system module 30 characterizes a local communication link as a candidate communication system when the first communication system module 20 fails, so that the intelligent internet of things device can timely and effectively upload own data to the cloud.

It is conceivable that when the microprocessor 40 controls the intelligent internet of things device to use the corresponding communication system module, an operating system corresponding to the communication system module is started to implement processing of the transceiving data. Specifically, when the microprocessor 40 controls the intelligent internet of things device to perform data communication by adopting the first communication system module 20, a first operating system is started; similarly, when the microprocessor 40 controls the intelligent internet of things device to perform data communication by adopting the second communication system module 30, the second operating system is started.

Optionally, the microprocessor 40 may feed back a signal to the microprocessor 40 according to whether the current intelligent internet of things device reports data successfully, that is, when the intelligent internet of things device uploads data successfully, where the signal is used to mark whether the data upload is successful, if 1 corresponding to the signal value indicates that the data upload is successful, and 0 corresponding to the signal value indicates that the data upload is unsuccessful.

For example, assuming that the communication system module used for uploading data currently is the first communication system module 20, the microprocessor 40 determines whether the first communication system module 20 or the second communication system module 30 should be used currently according to the received signal, if the received signal value is 1, it is determined that the currently used communication module is the first communication system module 20 for uploading data successfully, and then the microprocessor 40 continues to control the intelligent internet of things device to use the module for uploading data. If the received signal value is 0, the microprocessor 40 will control the intelligent internet of things device to perform data uploading processing by adopting the second communication system module 30. .

Correspondingly, the microprocessor 40 controls the first communication system module 20, the antenna circuit 50 and the crystal oscillator 60 to be in a conducting state, namely, the microprocessor 40 performs power supply processing; the microprocessor 40 controls the second communication system module 30 to be in a power-down state, i.e. the microprocessor 40 performs power-down processing, so as to realize the dual-hardware link condition, and only depends on the single-module communication system to perform work during working, thereby greatly reducing power consumption.

Optionally, the antenna circuit 50 in this embodiment is used as a medium for communication between the intelligent internet of things device and the external device, that is, the antenna circuit 50 is used as a link of communication data interacted when the intelligent internet of things device communicates with the external device. The crystal oscillator 60 in this embodiment can provide a clock signal required by the microprocessor 40 to send a control signal when controlling the intelligent internet of things device.

Note that, in the aforementioned microprocessor 40, a first operating system corresponding to the NB-IoT communication system and a second operating system corresponding to the BLE communication system are stored.

In this embodiment, the microprocessor 40 includes a Flash, a Memory, and other functional modules, and is configured to store a software control system corresponding to an NB-IoT communication system and a BLE communication system, where the software control system refers to logic processing performed for transceiving data by a communication system module. Optionally, the software control system corresponding to the NB-IoT communication scheme is a first operating system, and the software control system corresponding to the BLE communication scheme is a second operating system.

In this embodiment, a schematic structural diagram of a dual-mode communication module is specifically illustrated, where the dual-mode communication module 1 includes: the power supply control circuit 10, the first communication system module 20 and the second communication system module 30 respectively connected with the power supply control circuit 10, the microprocessor 40 respectively controlling the first communication system module 20 and the second communication system module 30, and the antenna circuit 50 and the crystal oscillator 60 respectively connected with the microprocessor 40; the first communication system module 20 includes: a radio frequency device 201, and a radio frequency switching circuit 202 connected to the radio frequency device 201; the second communication system module 30 includes: a radio frequency transceiver circuit 301; correspondingly, the first communication system module 20 is of NB-IoT communication system; the second communication system module 30 is a BLE communication system; the microprocessor 40 stores a first operating system corresponding to the NB-IoT communication scheme and a second operating system corresponding to the BLE communication scheme. Compared with the prior art, the dual-mode communication module provided by the embodiment can adopt a control mode of time-sharing starting and independent operation for hardware equipment corresponding to an NB-IoT communication mode and a BLE communication mode, and when the microprocessor 40 controls the intelligent internet of things equipment to adopt a certain communication mode module for communication, an operating system and hardware corresponding to the communication mode module are controlled to start, and meanwhile, an operating system and hardware corresponding to another communication mode module are controlled to be in a power-off state, so that the power consumption of the dual-mode communication module can be reduced; in addition, when the BLE communication system module is independently used for data processing, the effect of the power consumption level of the BLE communication system module is achieved.

The radio frequency transceiver circuit 301 in the dual-mode communication module 1 is further explained below by means of fig. 2. Fig. 2 is a schematic structural diagram of a dual-mode communication module according to a second embodiment of the present utility model, as shown in fig. 2, the radio frequency transceiver circuit 301 includes:

the radio frequency transceiver circuit 301 includes a radio frequency transceiver 3011, a first capacitor C1 for protecting an operating voltage of the radio frequency transceiver, a bus port SPI for communicating with the microprocessor 40, and a first Power port VCC1 for receiving a first input Power1 provided by the Power control circuit 10 and a first antenna port ANT1 for connecting with the antenna circuit 50.

One end of the first capacitor C1 is grounded GND, and the other end of the first capacitor C1 is connected to a port corresponding to the first operating voltage VDD1 in the radio frequency transceiver 3011.

It will be appreciated that the radio frequency transceiver circuit 301 includes a radio frequency transceiver 3011 for implementing a transceiving process for communication data. The radio frequency transceiver 3011 is provided with a port for connecting to other hardware of the second communication system module 30.

Since the second communication system module 30 and the first communication system module 20 share the same microprocessor 40, the antenna circuit 50 and the crystal oscillator 60, and the antenna circuit 50 and the crystal oscillator 60 are connected to the microprocessor 40. Thus, the rf transceiver 3011 need only be connected to the microprocessor 40. Alternatively, the rf transceiver 3011 may be connected to the microprocessor 40 in a plug-in manner, or may be packaged in the same package as the microprocessor 40 using packaging techniques.

It is worth mentioning that the radio frequency transceiver 3011 also incorporates a transmitter, a receiver, and GFSK modem and baseband processing components. Specifically, the radio frequency transceiver 3011 includes a transmitter and a receiver, where the transmitter and the receiver are used to receive communication data sent by the microprocessor 40 and report the data to an external device, and a modem and a baseband processing device that are used to perform digital signal and analog signal conversion processing on the communication data and the report data, where the external device is a cloud platform or a collector.

The conversion process of the digital signal and the analog signal in this embodiment can be understood as follows: when receiving communication data sent by other devices such as a cloud platform, a collector and the like, the radio frequency transceiver 3011 triggers a modem and a baseband processing device inside the radio frequency transceiver 3011 so as to convert digital signals into analog signals; similarly, when receiving an upload data command from the microprocessor 40, the rf transceiver 3011 converts an analog signal corresponding to the communication data obtained from the memory module of the microprocessor 40 into a digital signal by using a modem and a baseband processing device. It should be noted that the foregoing is merely illustrative of the present embodiment, and does not exclude the form of converting digital signals and analog signals inside the intelligent internet of things device, and other converting situations.

It should be noted that, in this embodiment, the dual-mode communication module may be implemented by externally hanging the radio frequency transceiver on the NB-IoT chip, and based on this connection structure, the dual-mode communication module provided by the present utility model may select whether to attach the radio frequency transceiver according to the needs when in specific use, so as to facilitate flexible use. When the mounting is needed, a dual-mode communication module is obtained, and if the mounting is not needed, an NB-IoT communication system module is obtained.

In this embodiment, the radio frequency transceiver circuit 301 in the second communication system module 30 is specifically illustrated. As can be seen from the description of the present embodiment, the radio frequency transceiver circuit 301 is connected to the microprocessor 40 through the bus port SPI, and the microprocessor 40 should also have the bus port SPI consistent with the bus port SPI, so as to implement data communication; based on this, the radio frequency transceiver circuit 301 is directly or indirectly connected with the antenna circuit 50 and the crystal oscillator 60, so as to share the same microprocessor 40, the antenna circuit 50 and the crystal oscillator 60 with the first communication system module 20, thereby reducing the number of hardware devices required for dual-module communication, and further reducing the cost of the dual-module communication module.

The connection structure of the microprocessor 40 in the dual-mode communication module 1 is further explained with reference to fig. 3. Fig. 3 is a schematic structural diagram of a dual-mode communication module according to a third embodiment of the present utility model, and as shown in fig. 3, the microprocessor 40 includes:

a second Power supply port VCC2 for receiving a second input Power supply Power2 provided by the Power supply control circuit 10, a first communication port D1 for connection with the radio frequency device 201, an input/output port xtal_out/xtal_in for connection with the crystal oscillator 60, and a second antenna port ANT2 for connection with the antenna circuit 50.

It should be noted that, in the present embodiment, the first communication system module 20 and the second communication system module 30 share the same microprocessor 40.

In this embodiment, the microprocessor 40 is configured to control the first communication system module 20 and the second communication system module 30, and control the communication system modules by starting the first operating system and the second operating system stored therein.

In addition, the microprocessor 40 can control the working state of the intelligent internet of things device, and the power consumption of the hardware link corresponding to the dual-mode communication module is inconsistent in different working states.

The microprocessor 40 can control the frequency of the clock signal generated by the crystal oscillator 60 through its internal xtal_out/xtal_in ports according to the current operation state of the intelligent internet of things device. The crystal oscillator 60 may be a 32K crystal oscillator and a 26M crystal oscillator.

It should be noted that the 32K crystal oscillator is used to provide the clock signal of the sleep state for the microprocessor 40, and the 26M crystal oscillator is used to provide the clock signal of the wake-up operation state for the microprocessor 40.

It can be understood that when the microprocessor 40 determines that the current intelligent internet of things device is IN the sleep state, the 32K crystal oscillator needs to be turned on through the xtal_out/xtal_in port; when the microprocessor 40 determines that the current intelligent internet of things device is IN the wake-up state, the 26M crystal oscillator is turned on through the xtal_out/xtal_in port.

In this embodiment, the microprocessor 40 can be used by the first communication system module 20 and the second communication system module 30 together, and the operating system corresponding to each communication system module is stored in the microprocessor 40, and the hardware shares the software and has a time-sharing independent structure, so that the power consumption of the dual-mode communication module is greatly reduced; in addition, the microprocessor 40 can adopt corresponding clock signals under different working states of the intelligent internet of things equipment through the crystal oscillator 60, so that the energy consumption of the dual-mode communication module is reduced again from the aspects of standby and working.

The connection structure of the power control circuit 10 in the dual-mode communication module 1 is further explained by fig. 4. Fig. 4 is a schematic structural diagram of a dual-mode communication module according to a fourth embodiment of the present utility model, as shown in fig. 4, a power control circuit 10 includes:

a third input Power supply Power3, a third Power supply port VCC3 for receiving a third Power supply, and a second operating voltage VDD2 at which the Power supply control circuit operates.

After the intelligent internet of things device is powered on and started, the Power control circuit receives the third input Power3 of the external device, immediately converts the third input Power3 into a second working voltage VDD2 suitable for self-operation, and inputs the second working voltage VDD2 to the microprocessor 40 through a corresponding port, namely, the second working voltage VDD2 is used as the second input Power2 of the microprocessor 40, so that the microprocessor 40 after being powered on can perform the selection judgment processing of the communication mode.

It can be understood that the Power control circuit 10 is used as an energy source provider when the dual-mode communication module 1 works, and the Power3 of the first control circuit can be an energy source which is connected to a Power source or can be provided by a storage battery, and after the Power source is lost by components in the Power control circuit 10, the working voltage of the Power control circuit 10 or the voltage continuously output by the Power control circuit 10 can be formed.

The connection structure of the first communication system module 20 in the dual-mode communication module 1 is further explained with reference to fig. 5. Fig. 5 is a schematic structural diagram of a dual-mode communication module according to a fifth embodiment of the present utility model, and as shown in fig. 5, the first communication system module 20 includes: a radio frequency device 201 and a radio frequency switching circuit 202 connected to the radio frequency device.

Specifically, the rf device 201 includes a second communication port D2 for connecting to the rf switch circuit 202, and correspondingly, the rf switch circuit 202 includes a third communication port D3 for connecting to the antenna circuit 50.

The rf device 201 is connected to the rf switch circuit 202, so that when the first communication system module 20 is used for communication, the rf switch circuit 202 can be used to select an operator network currently used for data communication, so as to perform transceiving processing of communication data.

Accordingly, the radio frequency switch circuit 202 is used as a channel switch for forwarding or receiving communication data, and after a communication channel used for data communication is selected, the radio frequency switch circuit 202 is further connected to the antenna circuit 50 through a third communication port thereof, so as to forward the communication data to an external device or receive the communication data into the intelligent internet of things device.

In this embodiment, a specific connection structure inside the first communication system module 20 is specifically illustrated to clearly show the condition of the hardware link adopted by using the first communication system module 20.

The connection structure of the antenna circuit 50 in the dual-mode communication module 1 is further explained by fig. 6. Fig. 6 is a schematic structural diagram of a dual-mode communication module according to a sixth embodiment of the present utility model, and as shown in fig. 6, an antenna circuit 50 includes:

a second capacitor C2 for filtering, a resistor R1 connected with the second capacitor C2 for limiting current, and a third capacitor C3 connected with the resistor R1 for filtering; one end of the second capacitor C2 is connected to the first antenna port ANT1 or the second antenna port ANT2, the other end of the second capacitor C2 is grounded GND, one end of the third capacitor C3 is connected to one end of the resistor R1, and both the other ends of the third capacitor C3 and the resistor R1 are grounded GND.

The second capacitor C2, the third capacitor C3 and the resistor R1 in the antenna circuit 50 form a pi-type circuit, so as to eliminate noise, high-frequency clutter and other unnecessary electronic signals in the communication data, thereby ensuring the quality of the communication data.

When the first communication system module 20 performs data communication, the first communication system module 20 and the antenna port ANT1 of the antenna circuit 50 are in a conductive state, and the antenna port ANT2 of the second communication system module 30 is in a power-down state; similarly, when the second communication system module 30 performs data communication, the second communication system module 30 and the antenna port ANT2 of the antenna circuit 50 are in a conductive state, and the antenna port ANT1 of the first communication system module 20 is in a power-down state. In turn, the microprocessor 40 may implement time-sharing control.

In this embodiment, the antenna circuit 50 shared by the first communication system module 20 and the second communication system module 30 is specifically illustrated, and based on the structure of the dual-mode communication module, it can be known that the hardware link isolation scheme adopted by the first communication system module 20 and the second communication system module 30, that is, only the hardware link corresponding to one communication system module is substantially started at the same time, thereby fundamentally solving the interference problem between dual-mode communication in the prior art.

The connection structure of the first communication system module 20 in the dual-mode communication module 1 is further explained with reference to fig. 7. Fig. 7 is a schematic structural diagram of a dual-mode communication module according to a seventh embodiment of the present utility model, and as shown in fig. 7, the first communication system module 20 further includes: USIM circuit 70.

In this embodiment, it should be noted that the first communication system module 20 further includes a USIM circuit 70, and the USIM circuit 70 is used for performing network registration on an operator network used by the first communication system module 20. Correspondingly, the microprocessor 40 also has a fourth communication port D4 for connection with the USIM circuit 70.

It should be noted that, the two communication modes of the dual-mode communication module provided in this embodiment may select a default starting mode by software or hardware. In actual use, the user can select the default first communication system module 20 or the second communication system module 30 according to the product requirement, so as to achieve the optimal effect of the product. In addition, when the intelligent internet of things device performs data uploading, the result information of whether the data uploading is successful or not is generally fed back, optionally, the result information of whether the data uploading is successful or not can be fed back to the microprocessor 40, and then the microprocessor 40 can judge a communication execution module which the intelligent internet of things device should adopt at the next moment according to the fed back result information.

For example, assuming that the communication system module used by the intelligent internet of things device by default is the first communication system module 20, when the microprocessor 40 receives the result information that the data reporting is successful, the microprocessor 40 still uses the first communication system module 20 to perform data communication at the next moment; otherwise, the microprocessor 40 still uses the second communication system module 30 to perform data communication at the next moment.

The value mentioned is that, when the dual-mode communication module performs data communication with the first communication system module 20, the corresponding hardware link is: the microprocessor 40 invokes the first operating system stored therein, and is connected to the rf device 201, the rf switch circuit 202, and the USIM circuit 70, and further needs to control the hardware link corresponding to the second communication system module 30 to be in a disconnected state, and the microprocessor 40 and the rf transceiver circuit 301 to be in a disconnected state.

Similarly, when the dual-mode communication module performs data communication with the second communication system module 30, the hardware link is: the microprocessor 40 invokes the second operating system stored therein, which is in a conductive state with the rf transceiver circuit 301, and the microprocessor 40 controls the rf device 201, the rf switch circuit 202, and the USIM circuit 70 to be in a disconnected state.

The first communication system module 20 and the second communication system module 30 share the antenna circuit 50 and the crystal oscillator 60.

In this embodiment, the first communication system module 20 and the second communication system module 30 can operate independently in a time-sharing manner, and the same microprocessor 40 can store the operating systems corresponding to the two communication systems. Under a certain communication system module, a hardware link and an operating system corresponding to the communication system module are independently started, so that the power consumption performance of the whole dual-mode communication module is optimal.

It can be understood that the power consumption of the second communication system module 30, i.e. the BLE communication system module, is very low, because the software system and the hardware link of the communication module of the scheme of the present utility model are very simple, and the control link is very short and the response time is fast, the second communication system module can be quickly dormant after the data communication task is completed, so as to achieve the purpose of extremely consuming current.

When the first communication system module 20 is independently started, the radio frequency device 201 and the radio frequency switch circuit 202 are loaded in the microprocessor 40, the crystal oscillator 60 is configured and enabled, and the communication and control ports of the radio frequency transceiver 3011 of the second communication system module 30 are controlled to be in a disabled state, namely, the power supply of the radio frequency device is disconnected. At this time, the dual-mode communication module externally presents a universal NB-IoT communication system module.

When the second communication system module 30 is independently started, the radio frequency transceiver 3011 of the second communication system module 30 is loaded in the microprocessor 40, the firmware is a single-thread microprocessor system, the functions are simple, the wake-up sleep time is short, the peak current is small, the power consumption is extremely low, the first communication system module 20 is disabled, and the radio frequency device 201 and the radio frequency switch circuit 202 are powered down. At this time, the radio frequency transceiver 3011, the microprocessor 40, the crystal oscillator 60 and the antenna circuit 50 of the second communication system module 30 together form a BLE communication system module, and the functional performance and the power consumption of the module are basically consistent with those of a single BLE module.

The utility model also provides an internet of things gas meter, which comprises the dual-mode communication module set in any embodiment.

It should be noted that the above-mentioned alternative embodiments are only examples provided by the present utility model, but the dual-mode communication module provided by the present utility model may be applicable to any device having an internet of things function.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features can be replaced equivalently; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (12)

1. A dual-mode communication module, comprising: the power supply control circuit, the first communication system module and the second communication system module which are respectively connected with the power supply control circuit, the microprocessor which respectively controls the first communication system module and the second communication system module, and the antenna circuit and the crystal oscillator which are respectively connected with the microprocessor;

the first communication system module includes: a radio frequency device and a radio frequency switch circuit connected with the radio frequency device;

the second communication system module includes: a radio frequency transceiver circuit;

the first communication system module adopts an NB-IoT communication system; the second communication system module adopts a BLE communication system; the microprocessor stores a first operating system corresponding to the NB-IoT communication format and a second operating system corresponding to the BLE communication format.

2. The dual-mode communication module of claim 1, wherein the radio frequency transceiver circuit comprises:

the radio frequency transceiver is used for protecting a first capacitor of the working voltage of the radio frequency transceiver, a bus port used for communicating with the microprocessor, a first power port used for receiving a first input power supply provided by the power supply control circuit and a first antenna port used for being connected with the antenna circuit;

one end of the first capacitor is grounded, and the other end of the first capacitor is connected with a port corresponding to a first working voltage in the radio frequency transceiver.

3. The dual-mode communication module of claim 2, wherein the radio frequency transceiver comprises: the device comprises a transmitter and a receiver, wherein the transmitter and the receiver are used for receiving communication data sent by the microprocessor and reporting data to external equipment, and a modem and a baseband processing device for carrying out digital signal and analog signal conversion processing on the communication data and the reporting data;

the external equipment is a cloud platform or a collector.

4. The dual-mode communication module of claim 3, wherein the microprocessor shared by the first communication mode and the second communication mode comprises: the antenna circuit comprises a power control circuit, a first power port for receiving a first input power provided by the power control circuit, a second power port for receiving a second input power provided by the power control circuit, a first communication port for being connected with the radio frequency device, an input/output port for being connected with the crystal oscillator, and a second antenna port for being connected with the antenna circuit.

5. The dual-mode communication module of claim 4, wherein the power control circuit comprises: the third input power supply is used for receiving a third power supply port of the third input power supply and controlling a second working voltage of the power supply control circuit.

6. The dual-mode communication module of claim 4, wherein the radio frequency device comprises: a second communication port for connection with the radio frequency switching circuit, the radio frequency switching circuit comprising, in response: and a third communication port for connection with the antenna circuit.

7. The module of claim 4, wherein the antenna circuit comprises: a second capacitor for filtering, a resistor connected with the second capacitor for limiting current and a third capacitor connected with the resistor for filtering;

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

8. The dual-mode communication module of claim 4, wherein the crystal oscillator comprises: a 32K crystal oscillator for providing a sleep state clock signal to the microprocessor, and a 26M crystal oscillator for providing an awake state clock signal to the microprocessor.

9. The dual-mode communication module of claim 1, wherein the first communication system module further comprises: a USIM circuit for registering the first communication system module;

the microprocessor further comprises: and a fourth communication port for connection with the USIM circuit.

10. The dual-mode communication module of any one of claims 1-9, wherein in the first communication mode, the microprocessor is in a conductive state with the USIM circuit, the radio frequency device, and a radio frequency switching circuit connected to the radio frequency device, and the microprocessor is in a disconnected state with the radio frequency transceiver circuit.

11. The dual-mode communication module of any one of claims 1-9, wherein in the second communication mode, the microprocessor is in an off state with the USIM circuit, the radio frequency device, and a radio frequency switching circuit connected to the radio frequency device, and the microprocessor is in an on state with the radio frequency transceiver circuit.

12. An internet of things gas meter comprising a dual mode communication module as claimed in any one of claims 1 to 11.