Solar constant-current street lamp control system based on 4G-Cat.1 communication

Abstract

The utility model discloses a solar energy constant current street lamp control system based on 4G-Cat.1 communication. The street lamp control system comprises a central control module, a PWM charging module, a battery management module, a boost constant current module and a 4G Cat.1 communication module. The central control module is connected to the PWM charging module, the battery management module, the boost constant current module and the 4G Cat.1 communication module, and provides instruction control for the PWM charging module, the battery management module, the boost constant current module and the 4G Cat.1 communication module. The output terminal of the solar cell is connected with the input terminal of the PWM charging module; the battery management module is connected to a power supply wiring terminal of the storage battery; the output terminal of the boost constant current module is connected with a lighting load; and the 4G Cat.1 communication module provides a wireless communication channel for the street lamp control system and external control equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of street lamp control, and in particular to a solar constant current street lamp control system based on 4G-Cat.1 communication. Background Art

[0002] As urbanization progresses, urban lighting, as a city's infrastructure, affects the city's image. At the same time, the lighting system of modern buildings consumes a lot of energy, accounting for 35% of modern energy consumption. Modern urban lighting systems have put forward green and environmental protection requirements. It is necessary to comprehensively consider the needs of reducing energy consumption and traffic lighting, and provide intelligent control of the lighting system. Regulate various urban lighting equipment in an intelligent way. The new urban intelligent lighting control system uses the Internet of Things communication technology. However, the traditional off-grid solar street light controller cannot adjust the switch time according to the needs in time, nor can it respond to the operation of the lighting facilities in time. The failure rate is high and maintenance is difficult. There is a great demand for the networking of off-grid solar street light controllers based on the Internet of Things, and solar street light control products with integrated Internet of Things modules are urgently needed.

[0003] In the process of intergenerational migration of cellular IoT connections, wireless network communication technology has been upgraded from 2G / 3G connections to the 4G / 5G era. Among them, in low-frequency and small-packet wireless network communication systems, low-mobility, low-latency-sensitivity, and high-cost-sensitivity devices can be networked through NB-IoT. Medium-speed wireless network communication systems with predetermined restrictions on latency and mobility and solutions with a certain tolerance for equipment costs can be carried out through Cat.1. 4G-IoT connections have obvious structural characteristics, among which Cat.1 is a branch worthy of attention. Judging from the current development trend of cellular IoT, the time for Cat.1 to assume the main role of 4GIoT connections has opened. Utility Model Content

[0004] The purpose of the utility model is to provide a solar constant current street light control system based on 4G-Cat.1 communication, the street light control system includes: a central control module, a PWM charging module, a battery management module, a boost constant current module and a 4GCat.1 communication module;

[0005] The central control module is connected to the PWM charging module, the battery management module, the boost constant current module and the 4G Cat.1 communication module respectively, and provides command control for the PWM charging module, the battery management module, the boost constant current module and the 4G Cat.1 communication module;

[0006] The output terminal of the solar cell is connected to the input terminal of the PWM charging module;

[0007] The battery management module is connected to the power connection terminal of the battery;

[0008] The output terminal of the boost constant current module is connected to the lighting load;

[0009] The 4G Cat.1 communication module provides a wireless communication channel between the street light control system and external control equipment.

[0010] As described in the solar constant current street lamp control system of the present invention, the input terminals of the central control module are respectively connected to the output terminals of the PWM charging module, the battery management module, and the boost constant current module to monitor the output signals of the PWM charging module, the battery management module, and the boost constant current module.

[0011] A plurality of analog-to-digital converters are provided in the central control module for performing analog-to-digital conversion on signals from input terminals;

[0012] The output terminals of the central control module are respectively connected to the PWM charging module, the battery management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module to perform command control on the PWM charging module, the battery management module, the boost constant current module and the 4G Cat.1 communication module;

[0013] As described in the solar constant current street lamp control system of the utility model, the battery management module of the battery management module includes a power supply conversion unit, and the power supply conversion unit converts the voltage of the battery into a plurality of power supply voltages of different levels to supply power to each module;

[0014] The storage battery includes: lead storage battery, lithium storage battery, nickel storage battery, silver storage battery and sodium storage battery.

[0015] As described in the solar constant current street lamp control system of the utility model, the battery management module also includes: a voltage sampling circuit, an overcurrent and overvoltage protection circuit, and an indicator light circuit.

[0016] As described in the solar constant current street light control system of the utility model, the PWM charging module includes: a charging control circuit; the power input terminal of the charging control circuit is connected to the power output terminal of the solar cell, and the central control module controls the charging control circuit to charge the battery according to a predetermined charging program.

[0017] As described in the solar constant current street lamp control system of the utility model, the boost constant current module comprises: a boost circuit and a constant current control circuit.

[0018] The input terminal of the boost circuit is connected to the power terminal of the battery, and the boost circuit boosts the battery voltage to a voltage greater than that required by the lighting load;

[0019] The voltage greater than that required by the lighting load is used to supply power to the lighting load through a constant current control circuit.

[0020] As described in the solar constant current street light control system of the utility model, the 4G Cat.1 communication module has a built-in 4Gcat1 Internet of Things module; multiple input terminals of the 4G Cat.1 communication module are directly connected to the communication port of the central control module and the signal output terminal of the battery management module.

[0021] As described in the solar constant current street lamp control system of the present invention, the 4G Cat.1 is connected to an embedded SIM card, and the SIM card is a non-removable component.

[0022] The utility model 4G cat.1 solar street light control system integrates solar charge and discharge management, LED boost constant current drive, 4G cat.1 IoT module and other functions, and is designed for integrated LED street lights. Since it integrates the 4G cat.1 IoT module, the controller can be remotely operated through the computer or WeChat applet. Customers can view the specific location of the controller, view the historical record curve of the controller's usage, modify the controller's operating parameters, read the controller's operating status in real time, and the alarm information of abnormal controllers. Customers can easily add groups to the controller for easy management; intuitively and clearly understand the operating status of each controller under the group. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The principle block diagram of the utility model.

[0024] Figure 2 The schematic diagram of the central control module circuit of the utility model. DETAILED DESCRIPTION

[0025] 4Gcat.1 solar street light control system is specially designed for solar batteries. It integrates 4Gcat.1 IoT function and can directly drive LED street lights. It is small in size, easy to install, extremely convenient to use, and can read and write the parameters in the controller remotely through PC or WeChat applet. The controller uses intelligent digital chip to perform load-side boost constant current control, which improves accuracy and reliability. It supports multi-period and LED dimming control, making load control more flexible. At the same time, it has unique full-function protection measures such as current limiting protection, short-circuit protection, full, over-discharge automatic shutdown, recovery, etc., detailed charging, battery status, load and various fault indications. The chip samples the battery voltage, photovoltaic cell voltage, discharge current, ambient temperature and other parameters, and calculates through a dedicated control model to achieve high-accuracy control of the discharge rate and temperature compensation correction that conforms to the battery characteristics, and uses an intelligent and efficient PWM charging method to charge the battery, making the most of the efficiency of the solar panel. The device integrates a 4Gcat.1 IoT module, which enables the controller to connect to the Internet independently. The network improves customer experience with better coverage, faster speed and lower latency. With the terminal platform, users can remotely view the actual location of a specific 4Gcat.1 solar street light control system, historical usage curves, modify operating parameters, and read the operating status of the 4Gcat.1 solar street light control system in real time, abnormal alarm information, etc.

[0026] The technical solution of the utility model will be clearly and completely described below in conjunction with specific implementation schemes, but those skilled in the art should understand that the implementation schemes described below are only used to illustrate the utility model and should not be regarded as limiting the scope of the utility model. Based on the implementation schemes in the utility model, all other implementation schemes obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] Example 1

[0028] The utility model provides a solar constant current street lamp control system based on 4G-Cat.1 communication, the street lamp control system comprises: a central control module, a PWM charging module, a battery management module, a boost constant current module and a 4G Cat.1 communication module;

[0029] The central control module is respectively connected to the PWM charging module, the battery management module, the boost constant current module and the 4G Cat.1 communication module to provide command control for the PWM charging module, the battery management module, the boost constant current module and the 4G Cat.1 communication module;

[0030] The output terminal of the solar cell is connected to the input terminal of the PWM charging module;

[0031] The battery management module is connected to the power connection terminal of the battery;

[0032] The output terminal of the boost constant current module is connected to the lighting load;

[0033] The 4G Cat.1 communication module provides a wireless communication channel between the street light control system and external control equipment.

[0034] The utility model of 4G cat1 solar LED street light IoT constant current control system, as shown in the attached Figure 1 As shown. During the day, when the solar panel has voltage, the three-stage PWM charging method is used to charge the battery, and the load is turned off. At night, when the solar panel has no voltage, the load is turned on, and the battery voltage reaches the working voltage of the load through the boost constant current module and outputs a constant current. The 4Gcat1 module enables the controller to have the function of independent networking. Users can remotely set and view the specific status of the 4G cat1 solar LED street light IoT constant current control system through the computer terminal platform. At the same time, the street lights are controlled according to time periods to meet the lighting requirements in different time periods and weather conditions.

[0035] As described in the solar constant current street light control system of the utility model, the input terminals of the central control module are respectively connected to the output terminals of the PWM charging module, the battery management module, and the boost constant current module to monitor the output signals of the PWM charging module, the battery management module, and the boost constant current module. The circuit schematic diagram of the central control module is shown in the attached figure. Figure 2 shown.

[0036] A plurality of analog-to-digital converters are provided in the central control module for performing analog-to-digital conversion on signals from input terminals;

[0037] The output terminals of the central control module are respectively connected to the PWM charging module, the battery management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module to perform command control on the PWM charging module, the battery management module, the boost constant current module and the 4G Cat.1 communication module;

[0038] As described in the solar constant current street lamp control system of the utility model, the battery management module of the battery management module includes a power supply conversion unit, and the power supply conversion unit converts the voltage of the battery into a plurality of power supply voltages of different levels to supply power to each module;

[0039] The storage battery includes: lead storage battery, lithium storage battery, nickel storage battery, silver storage battery and sodium storage battery.

[0040] As described in the solar constant current street light control system of the utility model, the battery management module also includes: voltage sampling circuit, overcurrent and overvoltage protection circuit, indicator light circuit. The internal sampling circuit of the battery management module is used to identify the output voltage of the battery, so as to monitor and protect the battery.

[0041] As described in the solar constant current street light control system of the utility model, the PWM charging module includes: a charging control circuit; the power input terminal of the charging control circuit is connected to the power output terminal of the solar cell, and the central control module controls the charging control circuit to charge the battery according to a predetermined charging program.

[0042] As described in the solar constant current street lamp control system of the utility model, the boost constant current module comprises: a boost circuit and a constant current control circuit.

[0043] The input terminal of the boost circuit is connected to the power terminal of the battery, and the boost circuit boosts the battery voltage to a voltage greater than that required by the lighting load;

[0044] The voltage greater than that required by the lighting load is used to supply power to the lighting load through a constant current control circuit.

[0045] The boost constant current module outputs a boost constant current to the load through the boost circuit and constant current control circuit. The LED lamp beads of the usual LED lighting panel are 5 series, 8 parallel, 18 series, and 4 parallel. The power supply voltage range required by the lighting load is about 15V-54V, and the output current range is 0-2A. The BOOST boost circuit is used, and the load works at a constant current. The digital boost constant current function is realized by controlling the boost drive chip through the internal algorithm of the central control module.

[0046] As described in the solar constant current street light control system of the utility model, the 4G Cat.1 communication module has a built-in 4Gcat1 Internet of Things module; multiple input terminals of the 4G Cat.1 communication module are directly connected to the communication port of the central control module and the signal output terminal of the battery management module.

[0047] As described in the solar constant current street lamp control system of the present invention, the 4G Cat.1 is connected to an embedded SIM card, and the SIM card is a non-removable component.

[0048] The 4G-cat1 module uses an embedded SIM card, which embeds the traditional SIM card directly into the device chip instead of adding it as an independent removable component to the device, saving space inside the controller. Since there is no need to insert a physical SIM card, it is easier for users to switch operators and packages.

[0049] The utility model has the following functions

[0050] 1. It has the function of self-checking the system at the initial power-on, which can automatically detect the accuracy of the wiring sequence.

[0051] 2. Applicable to situations where the load operating voltage is higher than the battery voltage.

[0052] 3. The constant current control design can save the LED driving power supply.

[0053] 4. It has the function of adjusting power in multiple time periods. Users can flexibly set the time and load power to improve energy utilization.

[0054] 5. Complete electronic protection functions, load overcurrent, short circuit protection, battery overcharge protection, battery low voltage protection and internal over-temperature protection, etc.

[0055] 6. Equipped with sleep switch to improve battery life.

[0056] 7. Built-in 4G-cat1 module with IoT function, users can remotely read and write the running programs and parameters in the central control module through a personal computer or WeChat applet.

[0057] 8.4G-cat1 reset function ensures restart after shutdown when used outdoors, improving system stability; 9.Supports remote upgrade to continuously optimize the functions of the controller.

[0058] The PCB board of the utility model adopts an integrated design of the control mainboard and the 4G-cat1 Internet of Things module. The control mainboard mainly includes a central control module, a PWM charging module, a battery management module, and a boost constant current module. In the case of a large number of devices and a large current, a double-sided layout is still selected. The large current is ensured by reducing the loop area, increasing the line width, the copper foil thickness, and the copper foil window to ensure reliability. The ground plane of the 4G cat1 Internet of Things module is relatively separated from the ground plane of the control mainboard to ensure that data is not lost when sending and receiving data.

[0059] The utility model supports intelligent remote control of the switch of each lamp and supports local timing strategy control; it is suitable for applications such as dynamic landscape lighting control and energy-saving lighting control.

[0060] This utility model supports remote collection of data such as battery voltage, solar panel voltage, load LED voltage, load current, charging current, and operating time, so as to achieve fine perception of lamps and facilitate targeted maintenance. The light controller has the function of overcurrent and overload protection alarm for load lamps, ensuring the stability, reliability, and safety of the lighting system. It supports remote distribution and reading of device configuration parameters, and supports OTA remote upgrades, which helps to facilitate online inspection and maintenance and save long-term operation and maintenance costs.

[0061] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A solar constant current street light control system based on 4G-Cat.1 communication, characterized in that: The street light control system includes: a central control module, a PWM charging module, a battery management module, a boost constant current module and a 4G Cat.1 communication module; The central control module is connected to the PWM charging module, the battery management module, the boost constant current module and the 4G Cat.1 communication module respectively, and provides command control for the PWM charging module, the battery management module, the boost constant current module and the 4G Cat.1 communication module; The output terminal of the solar cell is connected to the input terminal of the PWM charging module; The battery management module is connected to the power connection terminal of the battery; The output terminal of the boost constant current module is connected to the lighting load; The 4G Cat.1 communication module provides a wireless communication channel between the street light control system and external control equipment.

2. The solar constant current street light control system according to claim 1, characterized in that: The input terminals of the central control module are respectively connected to the output terminals of the PWM charging module, the battery management module, and the boost constant current module to monitor the output signals of the PWM charging module, the battery management module, and the boost constant current module; A plurality of analog-to-digital converters are provided in the central control module for performing analog-to-digital conversion on signals from input terminals; The output terminals of the central control module are respectively connected to the PWM charging module, the battery management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module to perform command control on the PWM charging module, the battery management module, the boost constant current module and the 4G Cat.1 communication module.

3. The solar constant current street light control system according to claim 1, characterized in that: The battery management module includes a power supply conversion unit, which converts the voltage of the battery into a plurality of power supply voltages of different levels to supply power to each module; The storage battery includes: lead storage battery, lithium storage battery, nickel storage battery, silver storage battery and sodium storage battery.

4. The solar constant current street light control system as claimed in claim 3, characterized in that: The battery management module also includes: a voltage sampling circuit, an overcurrent and overvoltage protection circuit, and an indicator light circuit.

5. The solar constant current street light control system as claimed in claim 3, characterized in that: The PWM charging module comprises: a charging control circuit; a power input terminal of the charging control circuit is connected to a power output terminal of a solar cell, and a central control module controls the charging control circuit to charge the battery according to a predetermined charging procedure.

6. The solar constant current street light control system as claimed in claim 3, characterized in that: The boost constant current module comprises: a boost circuit and a constant current control circuit. The input terminal of the boost circuit is connected to the power terminal of the battery, and the boost circuit boosts the battery voltage to a voltage greater than that required by the lighting load; The voltage greater than that required by the lighting load is used to supply power to the lighting load through a constant current control circuit.

7. The solar constant current street light control system according to claim 1, characterized in that: The 4G Cat.1 communication module has a built-in 4G Cat.1 Internet of Things module; multiple input terminals of the 4G Cat.1 communication module are directly connected to the communication port of the central control module and the signal output terminal of the battery management module.

8. The solar constant current street light control system as claimed in claim 7, characterized in that: The 4GCat.1 is connected to an embedded SIM card, which is a non-removable component.

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