WO2022001743A1 - Communication module, light-fixture centralized controller, and intelligent light-fixture control system - Google Patents

Abstract

Provided is a communication module. The communication module comprises a WIFI radio-frequency module (11), a WIFI impedance matching module (13), an NB-IOT radio-frequency module (12), an NB-IOT impedance matching module (14), a dual-frequency duplexer (15), and an antenna (16), wherein one end of the dual-frequency duplexer (15) is connected to the antenna (16), and the other end thereof is respectively connected to the WIFI impedance matching module (13) and the NB-IOT impedance matching module (14); the WIFI radio-frequency module (11) is connected to the WIFI impedance matching module (13), and the NB-IOT radio-frequency module (12) is connected to the NB-IOT impedance matching module (14); when the dual-frequency duplexer (15) receives a radio-frequency signal from the antenna (16), the dual-frequency duplexer (15) is configured to identify, according to a frequency spectrum difference, whether the radio-frequency signal is a WIFI signal or an NB-IOT signal; and the WIFI impedance matching module (13) and the NB-IOT impedance matching module (14) are configured to realize impedance matching of radio-frequency signals.

Description

Communication modules, centralized lighting controllers, and smart lighting control systems

The present invention requires the priority of the Chinese patent application filed in the Chinese Patent Office, with the application number of 202010611034X, the application date of June 29, 2020, and the invention titled "communication module, centralized controller for lamps, and intelligent lighting control system" , the entire contents of this application are incorporated herein by reference.

The present invention also requires the priority of a Chinese patent application with the application number of 202021237757X, the application date of June 29, 2020, and the invention name of "communication module, centralized controller for lamps", which is submitted to the Chinese Patent Office. The contents are incorporated herein by reference.

technical field

The invention belongs to the field of road lighting, in particular to a road lighting controller.

Background technique

There are many types of road lighting wireless control devices, such as: NB IOT wireless controller, Zigbee wireless controller, ISM frequency band wireless controller, usually do not have short-range wireless communication capability or short-range wireless communication requires another antenna, namely An antenna is required for long-distance communication and short-distance communication, especially for the controller working in the street lamp pole, and the antenna needs to be led out to the outside of the lamp pole.

Road lighting wireless terminal equipment usually needs to be installed in a hidden location. For example, the wireless terminal equipment installed inside the light pole usually needs to export the communication signal to the outside of the light pole, while the usual wireless terminal equipment only has long-distance communication with the cloud. If you want to increase the short-range wireless communication capability on the basis of the long-distance communication capability, you need to increase the short-range wireless communication radio frequency.

FIG. 1 is a schematic diagram of a circuit structure of two radio frequency signals of a communication module of a conventional street lamp centralized controller. As shown in Figure 1, the NB IOT radio frequency module outputs to the radio frequency port through the matching circuit (which includes capacitors C1, C2, and inductor L1), and then connects a radio frequency feeder RF cable to an antenna; the WIFI radio frequency module passes through the matching circuit ( It includes capacitors C3, C4, and inductor L2) output to the RF port, and then connects an RF feeder RF cable to an antenna. The overall realization of two-way communication requires the use of two radio frequency ports, connecting two RF cables, and then connecting them to two antennas respectively. Installing 2 antennas in the controller will lead to disadvantages such as high cost, complicated construction and low reliability.

SUMMARY OF THE INVENTION

The purpose of the present invention is to at least solve one of the problems in the prior art, such as increased cost, complicated construction and low reliability caused by installing two antennas in the controller, and proposes a new type of communication module and centralized control of lamps and smart lighting control system.

Technical solution 1 of the present invention: a communication module, including a WIFI radio frequency module, a WIFI impedance matching module, an NB-IOT radio frequency module, an NB-IOT impedance matching module, a dual frequency duplexer, and an antenna; the dual frequency duplexer One end is connected to the antenna, and the other end is connected to the WIFI impedance matching module and the NB-IOT impedance matching module respectively; the WIFI RF module is connected to the WIFI impedance matching module, and the NB-IOT RF module is connected to the NB-IOT impedance matching module; When the duplexer receives a radio frequency signal from the antenna, the dual frequency duplexer is configured to identify whether the radio frequency signal is a WIFI signal or an NB-IOT signal according to the spectrum difference; the WIFI impedance matching module, and the NB-IOT impedance matching module are configured to realize the radio frequency impedance matching of the signal.

Further, a radio frequency feeder is connected between the antenna and the dual frequency duplexer.

Further, the dual-band duplexer is provided with a common port, a low-frequency port, and a high-frequency port.

Further, the common port inputs the radio frequency signal from the antenna; the low frequency port outputs the NB-IOT radio frequency signal; the high frequency port outputs the WIFI radio frequency signal.

Further, the channel between the public port and the low-frequency port has a small loss to the NB-IOT radio frequency signal, and a large loss to the WIFI radio frequency signal; The loss of the radio frequency signal is small, and the loss of the NB-IOT radio frequency signal is large.

Technical solution 2 of the present invention: a centralized controller for lamps, comprising a microprocessor, a memory, a clock circuit, and the aforementioned communication module, wherein the microprocessor is electrically connected to the memory, the clock circuit and the communication module, respectively; The clock circuit is configured to provide a real-time calendar clock function to the microprocessor, and provide a clock reference for the centralized lamp controller to realize an intelligent dimming strategy; the memory is configured to store data information of the lamp centralized controller.

Further, the centralized controller for lamps further includes a switch input circuit, an electrical parameter acquisition and measurement circuit, and a loop control circuit; wherein, the electrical parameter acquisition and measurement circuit is configured to The received power information is sent to the microprocessor, and the microprocessor determines whether there is an abnormality; the digital input circuit is configured to collect external input dry contact signals, and send the collected signals to the microprocessor, which is processed by the microprocessor. The circuit control circuit is configured to receive the control command of the microprocessor, output the switch control signal, and control the on-off of the external contactor to realize the circuit switch control.

Further, the power information includes one or more of the following information: voltage, current, power, and electrical energy.

Further, the external input dry contact signal includes one or more of the following information: water immersion sensor, door sensor sensor, manual and automatic replacement switch, and contactor action feedback.

Further, the centralized controller for lamps further includes a display circuit; the display circuit is configured to display device information to a user and receive input information from the user.

Technical solution 3 of the present invention: a smart lighting control system, including a management service platform, a base station, and the aforementioned centralized lighting controller; wherein, a management service platform is provided with a plurality of base stations; a base station is provided with a plurality of Lighting centralized controller.

The beneficial effects of the present invention are as follows: the combination of the NB IOT and the WIFI signal proposed by the present invention makes the WIFI signal of the near-distance wireless and the NB IOT signal of the long-distance wireless usually combine into one radio frequency signal after mixing, which can be applied to a radio frequency signal with In the wireless controller of WIFI short-range communication. By combining the two signals, the radio frequency signal can be radiated through an antenna, thereby completing the system application of simplicity, low cost, and low installation complexity.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic diagram of the circuit structure of two radio frequency signals of a communication module of an existing street lamp centralized controller;

2 is a schematic structural diagram of a communication module of a preferred road lighting controller according to an embodiment of the present invention;

3 is a schematic diagram of an internal circuit of a communication module of a preferred road lighting controller according to an embodiment of the present invention;

4 is a schematic diagram of the internal structure of a preferred dual-frequency duplexer according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of insertion loss at low and high frequencies of a preferred dual-frequency duplexer according to an embodiment of the present invention;

6 is a schematic diagram of the internal structure of a preferred road lighting controller according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a preferred smart street light control system architecture according to an embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

The present invention will be further described below in conjunction with the accompanying drawings.

Example 1

FIG. 2 is a schematic structural diagram of a communication module of a preferred road lighting controller according to an embodiment of the present invention.

As shown in FIG. 2 , the communication module 1 of the road lighting controller includes a WIFI radio frequency module 11 , a WIFI impedance matching module 13 , an NB-IOT impedance matching module 14 , a dual frequency duplexer 15 , and an antenna 16 . The WIFI RF module 11 is connected to the WIFI impedance matching module 13 , the NB-IOT RF module 12 is connected to the NB-IOT impedance matching module 14 , and one end of the dual frequency duplexer 15 is respectively connected to the WIFI impedance matching module 13 and the NB-IOT impedance matching module 14 connected, the other end of the dual-band duplexer 15 is connected to the antenna 16 .

3 is a schematic diagram of an internal circuit of a communication module of a preferred road lighting controller according to an embodiment of the present invention.

As shown in Fig. 2-3, a radio frequency feeder is arranged between the dual frequency duplexer 15 and the antenna 16. After the antenna 16 receives the radio frequency signal, the antenna 16 sends the received radio frequency signal to the dual frequency duplexer through the radio frequency feeder. The dual frequency duplexer 15 determines whether the radio frequency signal belongs to the WIFI signal or the NB-IOT signal. If it is a WIFI signal, it is sent to the WIFI impedance matching module 13 to perform impedance matching on the WIFI signal. In step 3, the WIFI signal is matched with the 50Ω impedance by the matching elements C7, C8 and L4. After the impedance matching is completed, the WIFI impedance matching module 13 sends the WIFI signal to the WIFI radio frequency module 11 for processing.

If it is an NB-IOT signal, it is sent to the NB-IOT impedance matching module 14, and the NB-IOT impedance matching module 14 performs impedance matching on the NB-IOT signal. Specifically, in FIG. 3, the NB-IOT signal passes through the matching element C5. , C6 and L3 complete the 50Ω impedance matching with the NB-IOT radio frequency module 12. After the impedance matching is completed, the NB-IOT impedance matching module 14 sends the NB-IOT signal to the NB-IOT module 12 for processing. The communication module of the road lighting controller in Figure 2-3 realizes the simultaneous transmission and reception of NB-IOT and WIFI through an antenna.

FIG. 4 is a schematic diagram of the internal structure of a preferred dual-frequency duplexer according to an embodiment of the present invention, and FIG. 5 is a schematic diagram of low-frequency and high-frequency insertion loss of the preferred dual-frequency duplexer according to the embodiment of the present invention.

As shown in Figure 4-5, the dual-band duplexer 15 has three RF ports, the High-band port is a high-frequency port, the Low-band port is a low-frequency port, and the common port is a common port shared by low-frequency and high-frequency. B3, B5, and B8 are commonly used in NB-IOT signals, and the frequency range is 800-1850MHz, while the WIFI frequency band is 2400-2500MHz. Therefore, from the low-frequency insertion loss LOW-BAND Insertion Loss curve of dual-band duplexer 15 in Figure 5 It can be seen that the loss of the common port of the common port and the low-band port of the low-frequency port is about -0.5dB, indicating that the loss of the common port of the common port and the low-band port of the low-frequency port is very small, while the loss of the 2400-2500MHz signal of the WIFI signal It is -16dB, indicating that it is difficult for WIFI signals to be transmitted from the common port to the low-band port of the low-frequency port, and only the NB-IOT signal can be transmitted from the common port of the common port to the low-band port of the low-frequency port; It can be seen from the HIGH-BAND Insertion Loss curve of the high-frequency insertion loss of the frequency duplexer 15 that the loss of the common port common port and the high-frequency port HIGH-band port is about -0.8dB, indicating that the common port and the high-frequency port are about -0.8dB. The loss of HIGH-band port is very small, and the loss of 800-1850MHz signal of NB-IOT is more than -16dB, indicating that it is difficult for NB-IOT signal to transmit from common port to high-frequency port HIGH-band port, only WIFI signal From the common port common port to the high frequency port HIGH-band port. It can be seen that the radio frequency signal passing through the dual frequency duplexer 15 can be screened to be a WIFI signal or an NB-IOT signal. The dual frequency duplexer 15 completes the combined communication of the NB-IOT and WIFI signals, and the NB-IOT and WIFI signals do not affect each other and work independently of each other.

FIG. 6 is a schematic diagram of the internal structure of a preferred road lighting controller according to an embodiment of the present invention.

As shown in FIG. 1, the centralized street light controller 2 includes a microprocessor 21, a display circuit 22, a communication module 1, a clock circuit 25, a memory 26, an electrical parameter acquisition and measurement circuit 27, a switch input circuit 23, and a loop control circuit circuit 24. The display circuit 22 , the communication module 1 , the clock circuit 25 , the memory 26 , the electrical parameter acquisition and measurement circuit 27 , the switch input circuit 23 , and the loop control circuit 24 are all electrically connected to the microprocessor 21 .

The microprocessor 21 is configured to control the centralized controller 2 of the street lamps.

The display circuit 22 , preferably a touch display, can be used to display device information to the user, and can also be used to receive user input information. The user can query the actual state and parameter information of the centralized street light controller through the display circuit 22 .

The communication module 1 uses the communication module in FIG. 2-3. The communication module 1 is provided with an NB-IOT radio frequency module 12 and a WIFI radio frequency module 11. The NB-IOT radio frequency module 12 and the WIFI radio frequency module 11 pass through the aforementioned one The antenna transmits and receives signals.

The clock circuit 25 is configured to provide a real-time calendar clock function to the microprocessor 21, and to provide a clock reference for the centralized street light controller 2 to realize an intelligent dimming strategy.

The memory 26 is configured to store configuration information and the like of the centralized street light controller 2 .

The electrical parameter collection and measurement circuit 27 is configured to collect information such as three-phase voltage, current, power, electric energy, etc. of each loop, and send the collected information to the microprocessor 21, and the microprocessor 21 judges whether there is an abnormality, and Whether alarm information needs to be sent to the remote control platform 3 .

The switch input circuit 23 is configured to collect external input dry contact signals, such as water immersion sensors, door magnetic sensors, manual and automatic replacement switches, contactor action feedback, etc., and send the collected information to the microprocessor 21, which is controlled by the The processor 21 determines whether there is an abnormality and whether it is necessary to send alarm information to the background.

The loop control circuit 24 is configured to receive a control command from the microprocessor 21, output a switch control signal, and control the on-off of the external contactor to realize loop switch control.

FIG. 7 is a schematic diagram of a preferred smart street light control system architecture according to an embodiment of the present invention.

As shown in FIG. 7 , the smart street light control system includes a management service platform 3 , a base station 4 , and a centralized street light controller 2 . Among them, a management service platform 3 is provided with multiple base stations 4, such as base station 4A, base station 4B, base station 4C, etc., and a base station 4 is provided with multiple street lamp centralized controllers 2A, street lamp centralized controllers 2B, and street lamp centralized controllers 2C, street lamp centralized controller 2D, etc. The base station 4 and the centralized street lamp controller 2 can be connected through the NB-IoT communication network, and the centralized street lamp controller 2 can be connected through the WIFI network.

When communicating between multiple centralized street light controllers 2 and the management service platform 3, a certain centralized street light controller 2 can be selected as the bridge node, and when the management service platform 3 has a message to send to the multiple centralized street light controllers 2, The messages of multiple centralized street light controllers 2 can be packaged and sent to the selected bridge node through the NB-IOT network, and then sent to other centralized street light controllers 2 by the bridge node through the WIFI network. The data concurrency capability of the smart street light control system reduces message sending time and improves user perception.

Although preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (11)

1. A communication module includes a WIFI radio frequency module, a WIFI impedance matching module, an NB-IOT radio frequency module, an NB-IOT impedance matching module, a dual frequency duplexer, and an antenna, wherein,

   One end of the dual-band duplexer is connected to the antenna, and the other end is connected to the WIFI impedance matching module and the NB-IOT impedance matching module respectively;

   The WIFI RF module is connected with the WIFI impedance matching module, and the NB-IOT RF module is connected with the NB-IOT impedance matching module;

   When the dual-frequency duplexer receives a radio frequency signal from the antenna, the dual-frequency duplexer is configured to identify whether the radio frequency signal is a WIFI signal or an NB-IOT signal according to the spectrum difference;

   The WIFI impedance matching module and the NB-IOT impedance matching module are configured to realize impedance matching of radio frequency signals.
2. The communication module according to claim 1, wherein,

   A radio frequency feeder is connected between the antenna and the dual frequency duplexer.
3. The communication module according to claim 1, wherein,

   The dual-band duplexer is provided with a common port, a low-frequency port, and a high-frequency port.
4. The communication module according to claim 3, wherein,

   The common port inputs the radio frequency signal from the antenna;

   The low-frequency port outputs NB-IOT radio frequency signals;

   The high frequency port outputs WIFI radio frequency signals.
5. The communication module according to claim 4, wherein,

   The channel between the public port and the low-frequency port has little loss to the NB-IOT radio frequency signal, and is not suitable for WIFI

   The loss of the RF signal is large;

   The channel between the public port and the high-frequency port has little loss to the WIFI radio frequency signal, which is very important for NB-IOT.

   The loss of the RF signal is large.
6. A centralized controller for lamps, comprising a microprocessor, a memory, a clock circuit, and the communication module according to any one of claims 1-5, wherein,

   The microprocessor is electrically connected to the memory, the clock circuit and the communication module respectively;

   The clock circuit is configured to provide a real-time calendar clock function to the microprocessor, and provide a clock reference for the centralized controller of the lamps to realize the intelligent dimming strategy;

   The memory is configured to store data information of the centralized controller of the lamps.
7. The lamp centralized controller according to claim 6, wherein,

   The centralized controller for lamps further includes a switch input circuit, an electrical parameter acquisition and measurement circuit, and a loop control circuit;

   Wherein, the electric parameter collection and measurement circuit is configured to collect the power information of each circuit, and send the collected power information to the microprocessor, and the microprocessor judges whether there is any abnormality;

   The switch quantity input circuit is configured to collect the external input dry contact signal, and send the collected signal to the microprocessor, and the microprocessor judges whether there is abnormality;

   The loop control circuit is configured to receive the control command of the microprocessor, output the switch control signal, and control the on-off of the external contactor, so as to realize the loop switch control.
8. The lamp centralized controller according to claim 7, wherein,

   The power information includes one or more of the following information: voltage, current, power, and electrical energy.
9. The lamp centralized controller according to claim 7, wherein,

   The external input dry contact signal includes one or more of the following information:

   Water immersion sensor, door magnetic sensor, manual automatic change switch, contactor action feedback.
10. The lamp centralized controller according to claim 6, wherein,

    The lamp centralized controller further includes a display circuit;

    The display circuit is configured to display device information to a user and receive input information from the user.
11. A smart lighting control system, including a management service platform, a base station, and the lighting centralized controller according to any one of claims 6-10;

    Among them, a plurality of base stations are set under one management service platform;

    A base station is provided with a plurality of centralized controllers for lamps.

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