A micro-power wireless communication system and method applied to a power distribution network

Abstract

The application belongs to the field of electric power, and particularly relates to a micro-power wireless communication system and method applied to a power distribution network. The system comprises a multi-mode radio frequency processor circuit, a radio frequency power amplification circuit, a radio frequency matching circuit, a power management circuit, a mode management module and an antenna end. The multi-mode radio frequency processor circuit, the radio frequency power amplification circuit and the radio frequency matching circuit are sequentially connected. The multi-mode radio frequency processor circuit is further connected with the power management circuit and the mode management module respectively. The other end of the radio frequency matching circuit is connected with the antenna end. The wireless sensing can be widely applied in the field of power grid under the condition of low power consumption.

Description

Technical Field

[0001] This invention belongs to the field of power, and in particular relates to a low-power wireless communication system and method for use in power distribution networks. Background Technology

[0002] Society has vigorously improved the power distribution network, leading to its rapid development. However, this development has also brought about many problems, such as low standards in power grid construction and design, and frequent power outages. These issues require our solutions and improvements. With continuous social development and rising living standards, the power grid is becoming increasingly intelligent, necessitating that power distribution network equipment monitoring also meet these evolving needs. Currently, power distribution networks still rely on manual inspections to monitor the status of electrical equipment. However, due to limitations in current conditions, this monitoring is not yet perfect. For example, the wide distribution of electrical equipment, the complexity of different equipment types, frequent fault occurrences, and difficulties in locating and locating faults all increase the difficulty of equipment monitoring. Therefore, power distribution network equipment monitoring should aim for economy, reliability, and efficiency, achieving real-time, comprehensive, and detailed monitoring of the power grid equipment status and power supply stability, thereby improving the observability of the power grid.

[0003] Currently, with the gradual application of wireless sensing technology in the power grid sector, the limited transmission capabilities of wireless sensors necessitate the deployment of wireless communication modules at the sensor side to aggregate and forward the data collected. Since the devices requiring access at the field deployment end often use multiple communication standards, while existing communication modules are typically fixed to only one standard, developing a wireless module capable of compatible switching between multiple communication standards is a pressing technical challenge. Furthermore, existing wireless communication modules are limited by their high power consumption, hindering long-term battery life. Summary of the Invention

[0004] To address or improve the above problems, this invention provides a low-power wireless communication system and method for use in power distribution networks, the specific technical solution of which is as follows:

[0005] This invention provides a low-power wireless communication system for power distribution networks, comprising: a multi-mode RF processor circuit, an RF power amplifier circuit, an RF matching circuit, a power management circuit, a mode management module, and an antenna terminal; the multi-mode RF processor circuit, the RF power amplifier circuit, and the RF matching circuit are connected in sequence; the multi-mode RF processor circuit is also connected to the power management circuit and the mode management module respectively; the other end of the RF matching circuit is connected to the antenna terminal.

[0006] Preferably, the mode management module is used to store the operating mode and operating parameters of each communication standard supported by the multi-mode RF processor circuit; the mode management module is used to read the corresponding operating mode and operating parameters according to the communication standard required by the wireless sensing terminal, so as to configure the multi-mode RF processor circuit to meet the communication standard required by the wireless sensing terminal.

[0007] Preferably, the multimode RF processor circuit supports RF processing for more than one communication standard.

[0008] Preferably, the RF power amplifier circuit includes an equalizer, a combination switch, and a power amplifier; the antenna end includes a receiving antenna and a transmitting antenna; wherein, the equalizer includes a chip-type multilayer hybrid equalizer; the combination switch uses a high-frequency switching chip, and controls the operating states of the receiving antenna and the transmitting antenna by controlling the first switch and the second switch respectively; the power amplifier includes an AP1110 type 2.4G amplifier chip.

[0009] Preferably, the RF matching circuit includes a control unit, a first bias circuit, a second bias circuit, an adjustable capacitor, and an adjustable inductor; one end of the control unit is connected to the power amplifier, and the other end is connected to the first bias circuit; the first bias circuit is connected to the second bias circuit through the adjustable inductor, and the adjustable inductor is grounded through the adjustable capacitor; the second bias circuit is connected to the antenna.

[0010] Preferably, it also includes a power supply connected to the power management circuit.

[0011] Preferably, the power management circuit is used to determine whether the multi-mode RF processor circuit is in a working state. If it is in a working state, the power supply is turned on, and the RF power amplifier circuit, the RF matching circuit, and the antenna are powered through the voltage regulator circuit; otherwise, the power supply is not turned on.

[0012] Preferably, it also includes an antenna interface and a functional interface; the antenna interface includes at least one of a main antenna, a diversity antenna, a GNSS antenna, a Bluetooth antenna, and a WiFi antenna radio frequency antenna interface; the functional interface is used to provide signal input and output for IoT terminals.

[0013] Preferably, the functional interfaces include USB, USIM, UART, SD card, analog or digital audio, I2C, ADC, touch screen, camera, display, status indicator light, and general GPIO interface.

[0014] This invention provides a low-power wireless communication method for use in power distribution networks, applicable to the aforementioned systems, comprising:

[0015] The mode management module reads the corresponding working mode and working parameters according to the communication standard required by the wireless sensing terminal, so as to configure the multi-mode radio frequency processor circuit to conform to the communication standard required by the wireless sensing terminal.

[0016] When the power management circuit detects that the multi-mode RF processor circuit is in operation, it starts the power supply.

[0017] After the radio frequency power amplifier circuit amplifies the radio frequency signal from the multimode radio frequency processor circuit, the radio frequency matching circuit performs radio frequency adjustment so that the current bandwidth reaches a preset value. Then, the combination switch controls the first switch and the second switch to control the working state of the receiving antenna and the transmitting antenna, respectively.

[0018] The beneficial effects of this invention include:

[0019] (1) Wide coverage: Under the same frequency band, the coverage capability will be improved by 20dB compared to the existing network. The signal can penetrate walls or floors and cover deeper indoor scenes such as basements and underground pipes.

[0020] (2) Massive connectivity: Ideally, each sector can connect approximately 50,000 devices. Assuming 1,200 households per square kilometer and 40 devices per household, device connectivity is also achievable in this environment.

[0021] (3) Low power consumption: The use of low-power wireless sensing technology enables the wireless communication module to have lower power consumption and longer battery life. The unique power-saving mode and extended discontinuous reception are two core technologies that greatly extend the battery life of the smart terminal, enabling the battery to run for up to 10 years when transmitting a small amount of data every day.

[0022] (4) Low cost: The NB-IoT wireless communication module features half-duplex mode, single receiving antenna, low peak rate, low memory requirement (500KByte), and uplink and downlink bandwidth as low as 180kHz, which greatly reduces the complexity of baseband chip and wireless module design and can control the design cost of the module to within $5. At the same time, it is compatible with LTE, can reuse existing hardware devices, share spectrum, and has low network deployment cost. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a low-power wireless communication module for a power distribution network according to an embodiment of the present invention;

[0024] Figure 2 This is a flowchart of a low-power wireless communication method according to an embodiment of the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0029] To address or improve the problems mentioned in the background, the present invention provides a low-power wireless communication system for power distribution networks, comprising: a multi-mode RF processor circuit, an RF power amplifier circuit, an RF matching circuit, a power management circuit, a mode management module, and an antenna terminal; the multi-mode RF processor circuit, the RF power amplifier circuit, and the RF matching circuit are connected sequentially; the multi-mode RF processor circuit is also connected to the power management circuit and the mode management module respectively; the other end of the RF matching circuit is connected to the antenna terminal.

[0030] The mode management module is used to store the operating modes and operating parameters of each communication standard supported by the multi-mode RF processor circuit; the mode management module is used to read the corresponding operating mode and operating parameters according to the communication standard required by the wireless sensing terminal, so as to configure the multi-mode RF processor circuit to meet the communication standard required by the wireless sensing terminal.

[0031] The multimode RF processor circuit supports RF processing for more than one communication standard.

[0032] The radio frequency power amplifier circuit includes an equalizer, a combination switch, and a power amplifier. The antenna end includes a receiving antenna and a transmitting antenna. The equalizer includes a chip-type multilayer hybrid equalizer. The combination switch uses a high-frequency switching chip to control the operating states of the receiving antenna and the transmitting antenna by controlling the first switch and the second switch, respectively. The power amplifier includes an AP1110 type 2.4G amplifier chip.

[0033] The radio frequency matching circuit includes a control unit, a first bias circuit, a second bias circuit, an adjustable capacitor, and an adjustable inductor; one end of the control unit is connected to the power amplifier, and the other end is connected to the first bias circuit; the first bias circuit is connected to the second bias circuit through the adjustable inductor, and the adjustable inductor is grounded through the adjustable capacitor; the second bias circuit is connected to the antenna.

[0034] The system also includes a power supply connected to the power management circuitry.

[0035] The power management circuit is used to determine whether the multi-mode RF processor circuit is in a working state. If it is in a working state, the power supply is turned on, and the RF power amplifier circuit, the RF matching circuit, and the antenna are powered through the voltage regulation circuit; otherwise, the power supply is not turned on.

[0036] The system also includes an antenna interface and a functional interface; the antenna interface includes at least one of a main antenna, a diversity antenna, a GNSS antenna, a Bluetooth antenna, and a WiFi antenna radio frequency antenna interface; the functional interface is used to provide signal input and output for IoT terminals.

[0037] The functional interfaces include USB, USIM, UART, SD card, analog or digital audio, I2C, ADC, touch screen, camera, display, status indicator, and general GPIO interface.

[0038] This invention provides a low-power wireless communication method for use in power distribution networks, comprising:

[0039] The mode management module reads the corresponding working mode and working parameters according to the communication standard required by the wireless sensing terminal, so as to configure the multi-mode radio frequency processor circuit to conform to the communication standard required by the wireless sensing terminal.

[0040] When the power management circuit detects that the multi-mode RF processor circuit is in operation, it starts the power supply.

[0041] After the radio frequency power amplifier circuit amplifies the radio frequency signal from the multimode radio frequency processor circuit, the radio frequency matching circuit performs radio frequency adjustment so that the current bandwidth reaches a preset value. Then, the combination switch controls the first switch and the second switch to control the working state of the receiving antenna and the transmitting antenna, respectively.

[0042] Example

[0043] like Figure 1 As shown, the present invention provides a low-power wireless communication module for use in power distribution networks. The communication module includes at least a multi-mode radio frequency processor circuit, a radio frequency power amplifier circuit, and a radio frequency matching circuit connected in sequence.

[0044] The multi-mode RF processor circuit is also connected to the power management circuit and the mode management module, respectively.

[0045] The other end of the radio frequency matching circuit is connected to an antenna.

[0046] The operating modes and parameters of each communication standard supported by the multi-mode RF processor circuit are preset in the mode management module. The mode management module reads the operating modes and parameters of the communication standard required by the wireless sensing terminal to configure the multi-mode RF processor circuit to operate under the communication standard required by the wireless sensing terminal.

[0047] The multi-mode RF processor circuit supports RF processing for two or more communication standards. It can intelligently switch communication modes during use and amplify the power of transmitted or received signals through an RF power amplifier circuit.

[0048] The radio frequency power amplifier circuit includes an equalizer, a combination switch, and a power amplifier; wherein,

[0049] The equalizer used is the LDB212g4005C-001 type sheet multilayer hybrid equalizer.

[0050] The combination switch uses an HWS408 high-frequency switch chip, which controls the operating status of the receiving antenna and the transmitting antenna by controlling the first switch and the second switch respectively.

[0051] The power amplifier uses the AP1110 2.4G amplifier chip.

[0052] The radio frequency matching circuit includes at least: a control unit, a first bias circuit, a second bias circuit, an adjustable capacitor, and an adjustable inductor. One end of the control unit is connected to a power amplifier, and the other end is connected to the first bias circuit. The first bias circuit is connected to the second bias circuit through the adjustable inductor, and the adjustable inductor is grounded through the adjustable capacitor. The second bias circuit is connected to the antenna.

[0053] When the radio frequency matching circuit is working, the frequency range of the first bias circuit is 850MHz to 900MHz; the frequency range of the second bias circuit is 2.1GHz to 2.6GHz.

[0054] The control unit adjusts the capacitance / inductance values ​​of the adjustable capacitor / inductor to change the capacitance / inductance values ​​of the first bias circuit, which are then adjusted by the second bias circuit to ultimately achieve the target bandwidth. This enables different radio frequency signals to work together under the same wireless network, improves the self-organization capability of the sensor node, and effectively enhances the versatility of wireless communication technology.

[0055] The low-power wireless communication module of the present invention further includes a power supply connected to a power management circuit; the power management circuit determines whether the multi-mode RF processor circuit is in a working state. If it is, the power supply is turned on, and the RF power amplifier circuit, RF matching circuit and antenna are powered through a voltage regulator circuit; otherwise, the power supply is not turned on.

[0056] This invention also proposes a low-power wireless communication method, such as... Figure 2 As shown, the method includes:

[0057] The mode management module reads the operating mode and operating parameters under the communication standard required by the wireless sensing terminal, so as to configure the multi-mode radio frequency processor circuit to operate under the communication standard required by the wireless sensing terminal.

[0058] When the power management circuit detects that the multi-mode RF processor circuit is in operation, it starts the power supply.

[0059] After the radio frequency power amplifier circuit amplifies the radio frequency signal from the multimode radio frequency processor circuit, the radio frequency matching circuit performs radio frequency adjustment so that the current bandwidth reaches a preset value. Then, the combination switch controls the first switch and the second switch to control the working state of the receiving antenna and the transmitting antenna, respectively.

[0060] The present invention also proposes a low-power wireless communication circuit for use in power distribution networks. The communication circuit includes at least: a radio frequency power amplifier circuit, a radio frequency matching circuit, a multi-mode radio frequency processor circuit, and a power supply circuit. The multi-mode radio frequency processor circuit is connected to the radio frequency power amplifier circuit, the radio frequency power amplifier circuit is connected to the radio frequency matching circuit, and the radio frequency matching circuit is connected to the receiving antenna and the transmitting antenna, respectively.

[0061] The radio frequency matching circuit includes at least a control unit, a first bias circuit, a second bias circuit, an adjustable capacitor, and an adjustable inductor. One end of the control unit is connected to a power amplifier, and the other end is connected to the first bias circuit. The first bias circuit is connected to the second bias circuit through the adjustable inductor, and the adjustable inductor is grounded through the adjustable capacitor. The second bias circuit is connected to the antenna. Radio frequency adjustment is performed by the radio frequency matching circuit to achieve a preset bandwidth, thereby enabling radio frequency matching for different communication standards. This widens the full-band impedance matching of the circuit, reduces radio frequency signal loss, and allows for intelligent switching between two or more communication standards. Furthermore, it extends the module's battery life, enabling the module to support multiple communication standards and increasing its applicability. The wireless communication module can be deployed in three ways: in-band, guard band, or independent carrier, offering wide coverage, large connectivity, low power consumption, and low cost.

[0062] The present invention also proposes a low-power wireless communication device for use in power distribution networks, wherein the communication device adopts the low-power wireless communication module described above.

[0063] The low-power wireless communication device further includes: a peripheral interface unit, comprising an antenna interface and a functional interface. The antenna interface is composed of one or more of the following: a main antenna, a diversity antenna, a GNSS antenna, a Bluetooth antenna, and a WiFi antenna. The functional interface provides various signal inputs and outputs for IoT smart terminals, including at least a variety of the following: power supply, USB, USIM, UART, SD card, analog or digital audio, I2C, ADC, touch screen, camera, display, status indicator, and general GPIO interface.

[0064] The low-power wireless communication device may further include: a baseband unit, which is the central nervous system of the entire wireless communication module. It is mainly composed of a baseband processing chip, responsible for baseband signal processing and protocol processing, and mainly realizes functions such as baseband encoding and decoding, voice encoding and decoding, timing control, digital system control, radio frequency control, power saving control and human-machine interface control.

[0065] The memory storage unit is used to record and store the software parameters of the wireless communication module at the time of manufacture and some information data generated during terminal operation;

[0066] The automatic switching of wireless signal transmission or reception states via the combination switch specifically includes:

[0067] When in transmit mode, the radio frequency signal is processed by the baseband and output, loaded onto the carrier at 880-915MHz, and then transmitted from the antenna after power amplification.

[0068] When in receiving mode, the antenna converts the electromagnetic waves sent by the base station into a weak alternating current signal, which is then filtered, amplified at high frequency, and sent to the intermediate frequency for demodulation to obtain the received baseband information, which is then sent to the logic circuit for further processing.

[0069] The low-power wireless communication device of this invention may further include a display unit and a test function selection interface integrated on the surface of the housing. These are used to perform corresponding test functions on the wireless communication module and display the test results through the display unit. The test unit is integrated within the housing and may include a selection interface for connecting test functions, a display unit, and a central control unit for the low-power wireless communication module under test. A voltage sampling unit is used to collect the power supply voltage from the power supply unit and send the sampled voltage to the central control unit. The central control unit, in conjunction with the output current sent by the current sampling unit, controls the display unit to display the output current, power supply voltage, and power. The combined switch is connected to an equalizer and a power amplifier for automatic switching between wireless signal transmission and reception states.

[0070] The low-power wireless communication module testing system of this invention mainly consists of a main control computer, a multi-functional electromagnetic wave chamber, a listening unit, a comprehensive tester, and a standard protocol signal source. It addresses the issues of communication protocol consistency and interoperability monitoring, ensuring accuracy and reliability during the testing process.

[0071] The low-power wireless communication module described in this invention has the function of receiving and transmitting signals. It is mainly responsible for switching, transmitting and receiving, frequency synthesis, power amplification and signal filtering of radio frequency signals. It is the transmitter and receiver of the entire wireless communication module and directly determines the distance and quality of information transmission.

[0072] Furthermore, the power management unit is primarily responsible for providing a stable and reliable power supply to the module, and for reducing the overall system power consumption and energy consumption during idle periods through specific technical means, thereby ensuring that the smart terminal has a longer lifespan in battery-powered mode.

[0073] Those skilled in the art will recognize that the units of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components of each example have been generally described in terms of function in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0074] In the embodiments provided in this application, it should be understood that the division of units is only a logical functional division. In actual implementation, there may be other division methods, such as multiple units can be combined into one unit, one unit can be split into multiple units, or some features can be ignored.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A low-power wireless communication system for use in power distribution networks, characterized in that, include: Multimode RF processor circuit, RF power amplifier circuit, RF matching circuit, power management circuit, mode management module and antenna terminal; The multimode RF processor circuit, the RF power amplifier circuit, and the RF matching circuit are connected in sequence. The multimode RF processor circuit is also connected to the power management circuit and the mode management module, respectively. The other end of the radio frequency matching circuit is connected to the antenna end; The system is applied in a power distribution network environment; The multi-mode RF processor circuit works in conjunction with the power management circuit to achieve low power consumption through power-saving mode and / or power supply control based on operating state. The radio frequency power amplifier circuit includes an equalizer, a combination switch, and a power amplifier. The radio frequency matching circuit includes a control unit, a first bias circuit, a second bias circuit, an adjustable capacitor, and an adjustable inductor, used to achieve bandwidth adjustment; one end of the control unit is connected to the power amplifier, and the other end is connected to the first bias circuit; the first bias circuit is connected to the second bias circuit through the adjustable inductor, and the adjustable inductor is grounded through the adjustable capacitor; the second bias circuit is connected to the antenna terminal. When the radio frequency matching circuit is working, the frequency range of the first bias circuit is 850MHz to 900MHz; the frequency range of the second bias circuit is 2.1GHz to 2.6GHz. The system also includes a power supply connected to the power management circuit; The power management circuit is used to determine whether the multi-mode RF processor circuit is in a working state. If it is in a working state, the power supply is turned on, and the RF power amplifier circuit, the RF matching circuit, and the antenna are powered through the voltage regulation circuit; otherwise, the power supply is not turned on.

2. The low-power wireless communication system for power distribution networks according to claim 1, characterized in that, The mode management module is used to store the operating mode and operating parameters of each communication standard supported by the multi-mode RF processor circuit; The mode management module is used to read the corresponding working mode and working parameters according to the communication standard required by the wireless sensing terminal, so as to configure the multi-mode radio frequency processor circuit to meet the communication standard required by the wireless sensing terminal.

3. The low-power wireless communication system for power distribution networks according to claim 2, characterized in that, The multimode RF processor circuit supports RF processing for more than one communication standard.

4. The low-power wireless communication system for power distribution networks according to claim 3, characterized in that, The antenna end includes a receiving antenna and a transmitting antenna; The equalizer includes a sheet-like multi-layer hybrid equalizer; The combination switch uses a high-frequency switching chip, and controls the operating states of the receiving antenna and the transmitting antenna by controlling the first switch and the second switch respectively; The power amplifier includes an AP1110 2.4G amplifier chip.

5. The low-power wireless communication system for power distribution networks according to claim 1, characterized in that, It also includes antenna interfaces and function interfaces; The antenna interface includes at least one of the following: main antenna, diversity antenna, GNSS antenna, Bluetooth antenna, and WiFi antenna radio frequency antenna interface; The functional interface is used to provide signal input and output for IoT terminals.

6. The low-power wireless communication system for power distribution networks according to claim 5, characterized in that, The functional interfaces include USB, USIM, UART, SD card, analog or digital audio, I2C, ADC, touch screen, camera, display, status indicator, and general GPIO interface.

7. A low-power wireless communication method for use in power distribution networks, applicable to the system of claim 1, characterized in that, include: The mode management module reads the corresponding working mode and working parameters according to the communication standard required by the wireless sensing terminal, so as to configure the multi-mode radio frequency processor circuit to conform to the communication standard required by the wireless sensing terminal. When the power management circuit detects that the multi-mode RF processor circuit is in operation, it starts the power supply. After the radio frequency power amplifier circuit amplifies the radio frequency signal from the multimode radio frequency processor circuit, the radio frequency matching circuit performs radio frequency adjustment so that the current bandwidth reaches a preset value. Then, the combination switch controls the first switch and the second switch to control the working state of the receiving antenna and the transmitting antenna, respectively.

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