CN205541760U - Solar energy electronic road sign board - Google Patents

Abstract

A solar electronic road sign, which is composed of a solar charging and power supply control module and an LED display control module; device, power supply system, voltage detection circuit and GSM communication module; the LED display control module is composed of a display management controller and an LED display screen sequentially connected, and the display management controller is connected with the power supply system and the power management controller. The sign effectively combines photovoltaic power generation, single-chip microcomputer control, and digital LED display technology to facilitate road traffic instructions, temporary movement of signs, and online content change of signs.

Description

Solar Electronic Road Signs

technical field

The utility model relates to a road sign, in particular to a solar electronic road sign.

Background technique

With the development of the city, in order to facilitate people to travel in the city, road signs need to be set up on the road. However, the current road signs cannot effectively implement their functions when the illumination is relatively dark. Therefore, according to the development of existing technologies, combining photovoltaic power generation, single-chip microcomputer control, digital LED display technology, etc., can effectively solve the above problems.

The control system adopts a dual-control structure, and the dual controllers use single-chip microcomputers as the central processor, mainly including the central processor, central processing unit, data memory (RAM), program memory (ROM), watchdog timer (WDT), serial Line port, parallel port, interrupt system, bus, timer counter, and special function registers are a complete computer system, also known as a microprocessor or microcontroller. It is small in size but has the basic functions of a complete computer. Since it came out at the end of the 20th century, it has been widely used in industrial automation, mechatronics, measurement and control, automobiles, and smart home appliances.

Contents of the invention

The purpose of this utility model is to provide a solar electronic road sign, which effectively combines photovoltaic power generation, dual-single-chip microcomputer control, and digital LED display technology, and converts solar energy into electrical energy through photoelectric panels to supply power for LED dot matrix displays. The electricity is stored in the storage battery for use when the sunlight is insufficient, which is convenient for road traffic instructions, temporary movement of signboards and online content change of signboards.

As conceived above, the technical solution of the present utility model is: a solar electronic road sign, characterized in that it is composed of a solar charging and power supply control module and an LED display control module; the solar charging and power supply control module includes a solar charging board, Photovoltaic power generation controller, battery, illuminance AD acquisition circuit, power management controller, power supply system, voltage detection circuit and GSM communication module, wherein: the input port of the photovoltaic power generation controller is connected to the solar charging board through the access protection circuit, and the photovoltaic power generation The output port of the control is connected to the battery, and the battery is connected to the power supply system; the illuminance AD acquisition circuit, the power management controller and the power supply system are connected in sequence; the output end of the power supply system is connected to the input end of the voltage detection circuit, and the output end of the voltage detection circuit is connected to the power management system. The controller is connected; the power management controller communicates with the GSM communication module in two directions; the LED display control module is connected by the display management controller and the LED display, and the display management controller is connected with the power supply system and the power management controller.

Both the above-mentioned power management controller and display management controller adopt STC12C5A60S2.

The above-mentioned LED display adopts a 256*128 LED dot matrix screen.

The above-mentioned display management controller communicates with the power management controller through UART.

The utility model has the following advantages and positive effects:

1. The solar charging and power supply control system of the present utility model is equipped with a photovoltaic power generation controller controlled by a single-chip microcomputer, which controls the solar luminous panel to generate electric energy to supply power to the entire system, and controls the charging of the battery to prepare for insufficient sunlight. powered by. As a result, the signs use renewable green energy, which is not only environmentally friendly and pollution-free, but also makes the signs independent of the mains power supply, and can be used for mobile use, which solves the problem that night road instructions cannot be performed in places without power supply.

2. In the solar charging and power supply control system of the utility model, the illuminance is collected by the illuminance AD acquisition circuit, and the self-adaptive adjustment of the display background light is performed, which effectively saves energy and prolongs the working time.

3. The display screen adopted by the utility model is a 256*128 LED dot matrix, and the scanning method is used for display, so the single-chip microcomputer is required to have a relatively fast speed. In order to improve the cost performance of the system, this system adopts dual STC12C5A60S2 single-chip microcomputer system. This chip is a STC1T enhanced series chip. The instructions and pins are fully compatible with 8051, and there is a 60K program memory in the chip, and the program can be programmed directly through the serial port. Therefore, the requirements for development equipment are very low, and the development time is greatly shortened. One single-chip microcomputer is responsible for power management, and the other single-chip microcomputer is responsible for real-time display, thus solving the real-time problem of the system and ensuring the stability of the system.

4. GSM remote wireless control is added to the utility model, and the display content can be updated remotely, which effectively solves the problem that the general sign must have personnel to change the display content locally, which greatly facilitates the practicality and improves the efficiency and application cost.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is a circuit diagram of solar photovoltaic panel access protection;

Fig. 3 is a circuit diagram of the power supply system;

Fig. 4 is a serial port communication circuit diagram;

Fig. 5 is a circuit diagram of illuminance AD acquisition;

Fig. 6 is a circuit diagram of a photovoltaic power generation controller.

detailed description

As shown in Figure 1: a solar electronic road sign, which is composed of a solar charging and power supply control module and an LED display control module.

1. The LED display control module includes an LED display and a display management controller.

①The LED display adopts LED256*128 dot matrix screen as the display screen for indicating information display. Its working principle is to display on the screen one by one through the scanning method. It can make the LED dot matrix screen display the desired content.

②The display management controller uses STC12C5A60S2 single-chip microcomputer as the main control chip, and controls the display content of the LED display screen through high-speed refresh through the program. This chip independently controls the display of the dot matrix screen, which is one of the dual-control structures of the single-chip microcomputer, and can communicate with the power management controller through UART, and obtain information such as illuminance and battery status from the solar charging and power supply control system, thereby adjusting the LED display. screen backlight. If you need to change the display content, you need to change the display content in the LED display management control system through the solar charging and power supply control system.

2 solar charging and power supply control module

This module is mainly responsible for directly supplying the power generated by the photoelectric panel to the LED display system, the power function and the battery storage control system, and at the same time controlling the charging of the battery, so that the electronic road sign is separated from the mains power supply, thus achieving Energy saving, environmental protection and mobile features. This module mainly includes photovoltaic power generation controller, storage battery, illuminance AD acquisition circuit, power management controller STC12C5A60S2, power supply system, voltage detection circuit and GSM communication module, in which: the input port of the photovoltaic power generation controller and the solar charging board pass through the interface and protection Circuit connection, the output port of the photovoltaic power generation control is connected to the storage battery, and the storage battery is connected to the power supply system; the illuminance AD acquisition circuit, the power management controller and the power supply system are connected in sequence; the output terminal of the power supply system is connected to the input terminal of the voltage detection circuit, and the voltage detection circuit’s The output end is connected with the power management controller; the power management controller communicates with the GSM communication module bidirectionally.

①The solar photovoltaic panel is connected to the protection circuit (as shown in Figure 2):

The solar photovoltaic panel is connected to the control module from the interface circuit. This interface circuit includes a piezoresistor (CNR-10D151K) connected in parallel to the solar photovoltaic panel, which acts as an anti-surge protection function and enters the control system through S_V.

In order to prevent the phenomenon of current backflow in the solar photovoltaic panel, it is necessary to take anti-reverse measures. In this design, a 10A10 rectifier diode D4 is selected to protect the photovoltaic panel.

②Power supply circuit (as shown in Figure 3)

In order to adapt to the working environment with multiple installations, this system has specially set up a working mode selection circuit, using a 4-digit dialer, and 16 working modes can be selected.

③Serial port communication circuit (as shown in Figure 4)

Since the system adopts a dual-control structure, the communication between the two control boards is very important. The power management controller and the display management controller use the UART serial port for communication. The communication uses MAX3232 for TTL and RS232 level conversion, and At the same time played the role of isolation.

④Illuminance AD acquisition circuit (as shown in Figure 5)

This system needs to collect the external illuminance in real time, and control the brightness of the LED display according to the different illuminance. Through the adaptive adjustment of the screen brightness, the contrast of the LED display under different lighting conditions can be increased, and on the other hand, it can also effectively save energy. The working time of the system is extended. The light intensity sensor is mainly composed of a photosensitive sensor R8 and a standard resistor R9, and the light intensity is measured by collecting the divided voltage value of the photosensitive sensor. Under the action of an external electric field, electrons and holes move to the positive and negative electrodes respectively, so the resistance value decreases rapidly. On the contrary, when the light intensity is weak or even there is no light, the resistance of the photoresistor will be very large. Moreover, the resistance value of the photosensitive sensor and the illuminance change linearly, so the real-time illuminance can be calculated back by the calculated partial pressure of the photosensitive sensor. And the selected chip STC12C5A60S2 integrates 8-channel 10-bit AD on the chip, which can directly collect the divided voltage of the light sensor.

⑤Photovoltaic power generation controller, that is, the charge and discharge control circuit (as shown in Figure 6)

By detecting the voltage of the battery in real time to correspond to the working state of the battery, the most important thing for the battery is to avoid overcharging and over-discharging, and the static working point of each battery is fixed, we can collect the voltage of the battery To observe whether the battery has overcharged or discharged. When the battery is overcharged, the control system cuts off the charging circuit of the battery to protect the battery to avoid overcharging the battery. When the battery is about to be overcharged, the controller saves all working information and cuts off the power supply of the LED display system. Only the main circuit for charging the battery by the solar photovoltaic panel is reserved.

⑥GSM remote control module

The utility model adds the GSM remote control function, and realizes the update of the display content through this wireless method, which solves the problem that each device needs workers to go to the site to change the content before, and the console only needs to set the content Send it to each solar electronic road indication system according to the regulations to change the displayed content, and when the displayed content is successfully changed, the system will feedback the correct change information, and if it is not successfully changed, it will return an error message. The GSM remote control module is mainly controlled by the electric energy supply and battery storage control system, so the GSM module should be kept working continuously so that the workbench can keep abreast of the working status of the solar electronic road signs.

Claims (4)

1. A solar electronic road sign, characterized in that: it is composed of a solar charging and power supply control module and an LED display control module; the solar charging and power supply control module includes a solar charging board, a photovoltaic power generation controller, a storage battery, and an illumination AD Acquisition circuit, power management controller, power supply system, voltage detection circuit and GSM communication module, wherein: the input port of the photovoltaic power generation controller is connected to the solar charging board through the access protection circuit, the output port of the photovoltaic power generation control is connected to the battery, and the battery is connected to the The power supply system is connected; the illuminance AD acquisition circuit, the power management controller and the power supply system are connected in sequence; the output end of the power supply system is connected to the input end of the voltage detection circuit, and the output end of the voltage detection circuit is connected to the power management controller; the power management controller is connected to the power management controller. The GSM communication module communicates bidirectionally; the LED display control module is composed of a display management controller, an LED drive circuit and an LED display screen connected sequentially, and the display management controller is connected with a power supply system and a power management controller. 2. The solar electronic road sign according to claim 1, characterized in that: both the power management controller and the display management controller are STC12C5A60S2. 3. The solar electronic road sign according to claim 1, wherein the above-mentioned LED display screen adopts a 256*128 LED dot matrix screen. 4. The solar electronic road sign according to claim 1, wherein the communication between the display management controller and the power management controller is via UART.