Low-voltage input 4G-Cat.1 communication street lamp control system

Abstract

The utility model discloses a 4G-Cat.1 communication street lamp control system with low voltage input. The system comprises a power supply module, a central control module, a PWM charging module, a power management module, a boost constant current module, an infrared communication module and a 4G Cat.1 communication module. The power supply module supplies power to each module; the central control module provides instruction control for the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module. The infrared communication module provides an infrared communication channel for the street lamp control system and external control equipment; 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 low-voltage input 4G-Cat.1 communication street lamp control system. Background Art

[0002] In recent years, with the continuous development of energy storage materials, the energy density and cost of energy storage equipment are also continuously reduced, and lamps based on high energy density energy storage devices and solar charging devices are widely used in street lighting devices in urban and suburban roads. In the existing street light control device, the street lights can be monitored by remote wireless control based on the Internet of Things technology, which has high practical value. However, most of the existing solar Internet of Things street light controller products are 12V / 24V power supply systems, and multiple lithium batteries are connected in series to obtain 12V / 24V "high voltage" for use in street light control devices. Today, lithium batteries have become the mainstream of the battery market because of their small size, large capacity and stable performance. More and more applications directly use single-stage lithium battery configurations. The power supply voltage of the single-stage lithium battery is as low as 3.2V, which is not convenient for supplying lighting power.

[0003] On the other hand, the traditional solar street light controller and the Internet of Things module are two separately integrated devices. Using two devices to complete a system makes the controller bulky and unsightly, and requires strict manufacturing processes. The two modules are connected through external wiring, which may lead to poor communication, reduce reliability, increase failure rate, and increase costs. Utility Model Content

[0004] The purpose of the utility model is to provide a 4G-Cat.1 communication street light control system with low voltage input, the street light control system comprises: a power supply module, a central control module, a PWM charging module, a power management module, a boost constant current module, an infrared communication module and a 4G Cat.1 communication module;

[0005] The output terminals of the power supply module are respectively connected to the power supply terminals of the central control module, the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module to supply power to each module;

[0006] The central control module is respectively connected to the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module, and provides command control for the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module;

[0007] The infrared communication module provides an infrared communication channel between the street light control system and the external control device;

[0008] The 4G Cat.1 communication module provides a wireless communication channel between the street light control system and external control equipment.

[0009] As described in the street lamp control system of the present invention, a plurality of multi-bit analog-to-digital conversion channels are arranged in the central control module; the output terminals of the central control module are respectively connected to the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module, and provide command control for the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module; the input terminals of the central control module are respectively connected to the output terminals of the PWM charging module, the power management module and the boost constant current module, and monitor the output signals of the PWM charging module, the power management module and the boost constant current module.

[0010] As described in the street lamp control system of the present invention, the power supply module includes a battery and a first boost circuit. The battery is a single-stage battery. The low voltage output of the single-stage battery is converted into a high voltage output via the first boost circuit to supply power to each module.

[0011] As described in the street lamp control system of the utility model, the single-stage battery includes: lead battery, lithium battery, nickel battery, silver battery and sodium battery; the output low voltage range of the single-stage battery is: 1.2V-3.7V.

[0012] As described in the street lamp control system of the present invention, the high voltage range of the first boost circuit output is: 10V-48V.

[0013] As described in the street lamp control system of the utility model, the boost constant current module comprises: a second boost circuit and a constant current control circuit, the input terminal of the second boost circuit is directly connected to a single-stage battery to increase the voltage of the single-stage battery to a voltage greater than that required by the lighting load;

[0014] 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.

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

[0016] As described in the street lamp control system of the present invention, 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 respectively connected to the communication port of the central control module and the signal output terminal of the power management module.

[0017] As in the street light 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.

[0018] The utility model has the following advantages: the input voltage of the street light controller system with low voltage input 4G-Cat.1 communication is as low as 2.5V, and the single-cell lithium iron phosphate and ternary lithium batteries on the market can meet the normal power supply requirements, which greatly reduces the requirements of the street light controller system for the battery pack. At the same time, the control system integrates solar charge and discharge management, LED constant current drive, and 4G cat.1 Internet of Things module, which is specially designed for integrated LED street lights. Since it integrates the 4G cat.1 Internet of Things module, the controller can be remotely operated through the PC 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

[0019] Figure 1 The electrical principle block diagram of the utility model;

[0020] Figure 2 The electrical schematic diagram of the central processing unit circuit used in the first embodiment of the utility model;

[0021] Figure 3 Electrical schematic diagram of the 4G Cat.1 module used in the first embodiment of the present invention. DETAILED DESCRIPTION

[0022] The street light controller system with low voltage input 4G-Cat.1 communication provided by the utility model has an input voltage as low as 2.5V. The street light controller system can be powered normally by a single lithium iron phosphate battery or a ternary lithium battery cell commonly found on the market. It is specially designed for solar batteries and can directly drive LED street lights. It integrates functions such as a 4G cat.1 Internet of Things module, thereby avoiding poor communication due to external wiring, thereby improving communication reliability, beautiful appearance, small size, easy installation, and extremely convenient use. The parameters in the controller can be read and written remotely and OTA upgraded through a PC or WeChat applet. The invented central controller uses an intelligent digital chip to perform boost constant current control at the lighting load end, 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 short-circuit and anti-reverse protection, full-function protection measures such as automatic shutdown and recovery when full and over-discharged, and can provide detailed charging, battery status, load and various fault indications. The chip samples parameters such as battery voltage, photovoltaic cell voltage, discharge current, and ambient temperature, and calculates them through a dedicated control model to achieve high-precision control of the discharge rate and temperature compensation correction that meets the battery characteristics. An intelligent and efficient PWM charging method is used to charge the battery, making the most of the efficiency of the solar panel.

[0023] The preferred embodiments of the present invention will be described in detail below in conjunction with the examples. It should be understood that the following examples are provided only for the purpose of illustration and are not intended to limit the scope of protection of the present invention. Those skilled in the art may make various modifications and substitutions to the present invention without departing from the purpose and spirit of the present invention, and all of these modifications and substitutions fall within the scope of protection claimed in the claims of the present invention.

[0024] As attached Figure 1 As shown, the utility model provides a 4G-Cat.1 communication street lamp control system with low voltage input, and the street lamp controller system includes: a power supply module, a central control module, a PWM charging module, a power management module, a boost constant current module, an infrared communication module and a 4G Cat.1 communication module;

[0025] The output terminals of the power supply module are respectively connected to the power supply terminals of the central control module, the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module to supply power to each module;

[0026] The central control module is respectively connected to the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module, and provides command control for the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module;

[0027] The infrared communication module provides an infrared communication channel between the street light control system and the external control device;

[0028] The 4G Cat.1 communication module provides a wireless communication channel between the street light control system and external control equipment.

[0029] Example 1

[0030] As attached Figure 2 As shown, the central control module uses the single-chip GD32 chip as the main control chip, which has its own 12-bit AD channel to implement system voltage sampling and import it into the known control algorithm for calculation, and then output control signals to the power supply module, PWM charging module, power management module, boost constant current module, infrared communication module and 4G Cat.1 communication module.

[0031] A 12-bit analog-to-digital conversion channel is set in the central control module; the output terminals of the central control module are respectively connected to the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module, providing command control for the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module, and the input terminals of the central control module are respectively connected to the output terminals of the PWM charging module, the power management module and the boost constant current module to monitor the output signals of the PWM charging module, the power management module and the boost constant current module.

[0032] The user transmits data to the 4G Cat.1 module through the 4G base station antenna. The 4G Cat.1 module communicates with the central control module through the serial port through AT commands. The central control module realizes communication control functions through data analysis and data algorithms. The user sends parameters to the central control module, reads real-time data, performs online upgrades, and performs fault detection through the WeChat applet or PC platform.

[0033] The PWM charging module controls the MOS transistor to perform PWM charging according to the output instructions of the central control module, monitors the charging process of the battery through the sampling circuit, and provides over-discharge, over-charge and over-voltage protection. The charging output instructions of the central control module control the charging unit to charge the battery according to the predetermined charging curve. Avoid damage to the battery due to over-discharge, over-charge and over-voltage. The charging unit includes a solar panel and / or a mains power supply. When the central control module detects that the voltage of the battery is lower than the predetermined low voltage value, the output instruction turns off the lighting load, waits for the solar panel to have voltage, and starts the PWM charging module to charge the battery. When the battery voltage exceeds the set voltage, charging stops.

[0034] As described in the street light control system of the utility model, the power supply module includes a battery and a first boost circuit. The battery is a single-stage battery. The low voltage output of the single-stage battery is converted into a high voltage output via the first boost circuit to supply power to each module. The battery of the utility model is a 3.2V single-stage lithium battery, and the supply voltage is allowed to be as low as 2.5V. The first boost circuit uses a domestic DC-DC boost chip with an input voltage range of 2V to 24V.

[0035] The single-stage battery can also use a variety of batteries to replace the lithium battery. The various batteries include: lead batteries, lithium batteries, nickel batteries, silver batteries and sodium batteries; the output low voltage range of the single-stage battery is: 1.2V-3.7V.

[0036] The voltage provided by the power supply module to the PWM charging module, power management module, boost constant current module, infrared communication module and 4GCat.1 communication module is determined by the working voltage of each module. The high voltage range output by the first boost circuit is: 10V-48V.

[0037] As described in the street lamp control system of the utility model, the boost constant current module includes: a second boost circuit and a constant current control circuit, the input terminal of the second boost circuit is directly connected to a single-stage battery, and the voltage of the single-stage battery is increased to a voltage greater than the voltage required by the lighting load; the voltage range used by current LED street lamps is relatively wide, and is approximately between 10V and 120V according to the series and parallel structure of LED lamps, but the battery output is upgraded to a high voltage of more than 48V, and the safety is poor.

[0038] The voltage greater than that required by the lighting load is used to power the lighting load through a constant current control circuit, and the single-stage battery voltage is boosted and output to the load through a boost circuit and a constant current control circuit. The number of light board strings of the lighting load ranges from 3 to 10, the output voltage ranges from 9V to 30V, and the output current ranges from 0-2A.

[0039] As described in the street light control system of the utility model, the power management module includes: voltage sampling circuit, overcurrent and overvoltage protection circuit, indicator light circuit. The battery management module can identify the battery voltage, load voltage, photocell voltage, and sample the input and output current of the lighting load. It also has a protection circuit and an indicator light circuit to monitor and protect the battery.

[0040] As described in the street lamp control system of the present invention, 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 power management module.

[0041] As attached Figure 3 As shown, the utility model adopts 4G Cat.1 module and adopts medium and low rate Internet of Things to provide high-quality wireless connection services. It has multiple levels of sleep and wake-up modes.

[0042] As described in the street light control system of the utility model, the 4G Cat.1 communication module is connected to an embedded SIM card, which is a non-removable component. The traditional SIM card is directly embedded in the device chip instead of being added to the device as an independent removable component, saving internal space. Since there is no need to insert a physical SIM card, it is easier for users to switch operators and packages. The 4G Cat.1 communication module transmits the data and historical data collected by the central control module to the remote terminal, which can send data and upgrade software to improve product reliability and reduce maintenance costs.

[0043] The 4G cat1 module has the function of Internet of Things, which can save costs and improve reliability. Users can read and write the parameters in the central control block remotely through the PC or WeChat applet, and reserve backup infrared communication to achieve offline communication. It has a sleep switch to achieve ultra-low power consumption and sleep function. Improve battery life.

[0044] As described in the utility model, the street lamp control system adopts the integrated design of the control mainboard and the 4G cat1 Internet of Things module. The control mainboard mainly includes the central control module, the PWM charging module, the battery management module, and the boost constant current module. The double-sided layout is still selected when there are many devices and the current is large. 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.

[0045] The street lamp control system described in the utility model reserves a set of infrared transceiver tubes as an infrared communication module for installation, debugging and troubleshooting. The infrared communication module transmits and receives data with the central control module through TTL level. The infrared communication module can perform two-way communication with the infrared remote control device held by the installation and debugging personnel to read, write and debug the parameters in the central control block.

[0046] The shell structure design of the utility model has good signal interference shielding ability, good heat dissipation performance, and waterproof function. The shell is designed with a photocell indicator light, a battery two-color indicator light, a load indicator light, a 4G cat1 module status two-color indicator light, and a 4G rod antenna.

[0047] 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 4G-Cat.1 communication street light control system with low voltage input, characterized in that: The street lamp control system includes: a power supply module, a central control module, a PWM charging module, a power management module, a boost constant current module, an infrared communication module and a 4G Cat.1 communication module; The output terminals of the power supply module are respectively connected to the power supply terminals of the central control module, the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module to supply power to each module; The central control module is respectively connected to the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module, and provides command control for the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module; The infrared communication module provides an infrared communication channel between the street light control system and the external control device; The 4G Cat.1 communication module provides a wireless communication channel between the street light control system and external control equipment.

2. The street light control system according to claim 1, characterized in that: A plurality of multi-bit analog-to-digital conversion channels are arranged in the central control module; the output terminals of the central control module are respectively connected to the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module, and provide command control for the PWM charging module, the power management module, the boost constant current module, the infrared communication module and the 4G Cat.1 communication module; the input terminals of the central control module are respectively connected to the output terminals of the PWM charging module, the power management module and the boost constant current module, and monitor the output signals of the PWM charging module, the power management module and the boost constant current module.

3. The street light control system according to claim 1, characterized in that: The power supply module includes a battery and a first boost circuit. The battery is a single-stage battery. The low voltage output of the single-stage battery is converted into a high voltage output via the first boost circuit to supply power to each module.

4. The street light control system according to claim 3, characterized in that: The single-stage battery includes: lead battery, lithium battery, nickel battery, silver battery and sodium battery; the output low voltage range of the single-stage battery is: 1.2V-3.7V.

5. The street light control system according to claim 3, characterized in that: The high voltage range output by the first boost circuit is: 10V-48V.

6. The street light control system according to claim 3, characterized in that: The boost constant current module comprises: a second boost circuit and a constant current control circuit, wherein the input terminal of the second boost circuit is directly connected to a single-stage battery to boost the voltage of the single-stage battery 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 street light control system according to claim 1, characterized in that: The power management module includes: a voltage sampling circuit, an overcurrent and overvoltage protection circuit, and an indicator light circuit.

8. The street light control system according to claim 1, characterized in that: The 4G Cat.1 communication module has a built-in 4Gcat1 Internet of Things module; a plurality of input terminals of the 4G Cat.1 communication module are respectively connected to the communication port of the central control module and the signal output terminal of the power management module.

9. The street light control system according to claim 8, characterized in that: The 4G Cat.1 is connected to an embedded SIM card, which is a non-removable component.

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