CN201166813Y - Tracking controller for butterfly type solar system - Google Patents

Abstract

The utility model relates to a tracking controller used for a butterfly-shaped solar system and belongs to the field of the solar energy application. The tracking controller comprises a single-chip, a time/calendar chip, a keyboard display chip, an LED display panel, a reverse amplifier and a keyboard used for inputting the information, such as local time, date, longitude and latitude. The time/calendar chip is connected with the single-chip and transmits a time signal to the single-chip. The single-chip sets up the communication with the keyboard and the LED display panel via the keyboard display chip. The single-chip works out the solar angle according to the key-in information and the time information and sends to the LED display panel for displaying. The single-chip is connected with the reverse amplifier and controls the rotation of a stepping motor according to the calculated solar angle. The tracking controller is also connected with an external stepping motor module to realize the solar tracking. The tracking controller has the advantages of simple structure, high accuracy, small size and no limitations of time and space; and facilitates the research related to the solar tracking.

Description

A kind of tracking control unit that is used for the butterfly solar energy system

Technical field

The utility model relates to a kind of tracking control unit that is used for the butterfly solar energy system, and the tracking accuracy that is realized can satisfy the accurate requirement that solar engineering is calculated, and is particularly suitable for being engaged in staff's use of field of solar energy.

Background technology

At present, the worker who is engaged in solar tracking research will expect the required sun angle of solar engineering calculating, often to pass through a series of loaded down with trivial details processes, and the sun angle that can only be put sometime, gained is narrow application range as a result, makes mistakes easily in the solution procedure, particularly in the butterfly solar energy system, the equipment that receives sun power belongs to point focusing class gatherer, if do not adopt tracker, then can not finish the collecting work of sun power.

The utility model content

The purpose of this utility model has been to overcome the above-mentioned defective of existing sun angle method of testing, and a kind of tracking control unit that is used for the butterfly solar energy system is provided.This controller can obtain the sun angle of anywhere, random time easily, and can show in real time.External stepper motor module can be passed through step motor drive, adjusts the orientation of gatherer, makes it to aim at the sun, thus collection sun power as much as possible.

The utility model is a kind of controller, and this controller can calculate sun angle and with its real-time demonstration, external stepper motor module can realize the purpose from the motion tracking sun.

To achieve these goals, the utility model has been taked following technical scheme.This controller includes single-chip microcomputer, time calendar clock, keyboard display chip, LED display board, sign-changing amplifier and is used to import the keyboard of local time, date, longitude and latitude information; Wherein:

Time calendar clock links to each other with single-chip microcomputer, sends clock signal to single-chip microcomputer;

Single-chip microcomputer links to each other with the LED display board with keyboard by the keyboard display chip, and single-chip microcomputer calculates solar angle and delivers to the demonstration of LED display board according to the key entry information and the clock information of keyboard;

Single-chip microcomputer is connected with sign-changing amplifier, single-chip microcomputer comes the control step motor according to the solar angle that calculates by sign-changing amplifier rotation.

Core component single-chip microcomputer of the present utility model receives keyboard signal, can find the solution the starting condition (comprising local time, date, local longitude, local latitude) of sun angle by the keyboard adjustment, single-chip microcomputer is made corresponding reaction behind data initialization, handle through internal data, carry out data transmission, the sun angle that is shown in real time by I2C bus and time calendar clock and keyboard display chip.The utility model is provided with stepper motor module external tapping, can set up with the stepper motor module and get in touch, and can rotate on request by the control step motor.

The utility model can carry out two-dimensional tracking to sun altitude, position angle under the horizontal system of coordinates, not only improved tracking accuracy, and can come the control step motor drive module according to solar angle; Also have advantages such as simple in structure, that volume is little simultaneously.

Description of drawings

Fig. 1 principle schematic of the present utility model

Fig. 2 main program block diagram of the present utility model

Fig. 3 stepper motor module of the present utility model process flow diagram

Fig. 4 circuit theory diagrams of the present utility model

Embodiment

The utility model is described in further detail below in conjunction with Fig. 1～4:

As shown in Figure 1, present embodiment includes single-chip microcomputer and the sign-changing amplifier that links to each other with single-chip microcomputer, time calendar clock, keyboard display chip, and the keyboard display chip also links to each other with the LED display board with keyboard.Present embodiment is by keyboard to set up starting condition (local longitude, local latitude, local time, date), single-chip microcomputer begins to carry out data processing after obtaining confirmation signal, calculate sun angle, and solar angle is shown, be convenient to reading and monitoring of data by the LED display board.

What as shown in Figure 4, present embodiment adopted is the serial communication method of I2C bus.It is master controller that present embodiment adopts single-chip microcomputer, CMOS real-time clock/the calendar chip and the keyboard interface chip that are aided with low-power consumption, drive keyboard and led driver and realize the adjustment of required sun angle and show in real time, can be conveniently carry out read-write operation apace and only take two I/O ports of single-chip microcomputer by the I2C bus.The I2C bus comprises a serial data line (SDA) and a serial time clock line (SCL).SDA data line and SCL serial time clock line are connected on the power supply VCC by pull-up resistor, and SDA and the SCL stitch with other I2C principal and subordinate device is connected on SDA data line and the SCL serial time clock line again.AT89C51RC realizes the operation of I2C Bus interface by its universaling I/O port.Pin P1.1 with AT89C51RC in the present embodiment links to each other with the SCL clock line, and pin P1.0 links to each other in order to Simulation with I 2C bus with the SDA data line.AT89C51RC is the main device on the I2C bus of the present invention, and ZLG7290 and PCF8563T be from device, thereby carries out exchanges data between principal and subordinate's device by the communication protocol of program realization I2C.

The main program block diagram of present embodiment as shown in Figure 2, behind initialization procedure, after processing is adjusted through button, obtained calculating solar angle desired data, through behind the clock data and these two processes of calculating solar angle that read PCF8563T, at last solar angle is shown on the led display board again; This program mainly comprises following step:

First step button Interrupt Process.When button is pressed, jump to by key processing module, and carry out the data adjustment according to the key function, after being pressed, jumps out on definite key by key processing module.AT89C51RC writes adjusted starting condition among the PCF8563T;

Second step set up AT89C51RC and communicates by letter with I2C between the PCF8563T, with AT89C51RC is main device,, after clock chip is handled, obtain a real-time clock data, and the real-time time data are turned back in the single-chip microcomputer for primary data is write the PCF8563 with PCF8563 from device;

The 3rd step was carried out data processing in AT89C51RC inside, pressed the correlation formula of solar orbit and calculated the concrete numerical value of the sun angle that obtains;

Concrete computing formula:

Declination angle δ can be calculated approx by the Cooper equation:

In the formula n be the date of asking in 1 year the day subnumber;

After obtaining declination angle according to following formula, just can obtain the sun altitude under arbitrary solar time.The angle on sunray and ground is called sun altitude, represents with α s, can be determined by following formula:

In the formula

---local latitude;

δ---declination angle;

ω---hour angle.

Solar azimuth be solar condenser and sun line on the ground projection and the angle between the North and South direction line, use γ _sExpression, can determine by following formula:

Or sin γ _s=cos δ sin ω/cos α _s

The 4th step set up AT89C51RC and communicates by letter with I2C between the ZLG7290, single-chip microcomputer with sun angle (comprising elevation angle and the position angle) data transfer that is converted to the ZLG7290 buffer zone and by ZLG7290 driving LED display board.Be pressed if any button, then turn back in the first step once more.

Present embodiment by the repercussion amplifier external the stepper motor module, then can be according to the rotation of the solar angle control step motor that calculates, realize following the tracks of.

As shown in Figure 3, when program jumps to the stepper motor module, at first make judgement (setting value in this step is decided according to the relation of different location intensity of solar radiation and solar angle) according to sun altitude, the setting value value is 1 degree in the present embodiment.Be judged as "Yes", then determine the sense of rotation of stepper motor and rotate step number according to sun angle; Be judged as "No", then system is repositioned to initial position.

System is by the rotation of control step motor driver and then control step motor, and single-chip microcomputer links to each other with the pulse signal port with the port of the direction signal of driver by sign-changing amplifier.The main flow process of stepper motor subroutine comprises: single-chip microcomputer sends 0 or 1 port to the stepper motor driver direction signal, the sense of rotation of control motor, single-chip microcomputer sends the port of pulse signal to the stepper motor driver pulse signal, controls the anglec of rotation of motor by the quantity of pulse signal.

The using method of present embodiment: at first reset after the start, what show on the led display board is sun altitude under the starting condition.Present embodiment be provided with Time, Data, Lat, Lon, Tran, Add, Left, Ok totally eight keys be used for starting condition is adjusted.When key is pressed, master routine jumps to by key processing module, AT89C51R constantly carries out keyboard scan, after keyboard function key (Lon) is pressed, the LED display board is by showing that real-time sun altitude switches to the display interface of adjusting longitude, by button Left is selected who numeral is adjusted, chosen numeral is glimmered on the LED display board., press the Ok key and confirm this operation that adds 1 at selected back, the position keys available Add that adjusts.After pressing keyboard function key (Time), the led display board has switched to the adjustment interface of time; After pressing keyboard function key (Data), the led display board has switched to the adjustment interface on date; After pressing keyboard function key (Lat), the led display board has switched to the adjustment interface of latitude, and method of adjustment is the same.Starting condition is adjusted to when meeting customer requirements, presses definite key (Ok), and the LED display board has switched back to initial display interface again, has begun the real-time demonstration of the solar angle under new starting condition.In addition, if the user wants led display board display orientation angle, can press function key (Tran), when this button is pressed once more, the led display board switches back the demonstration to elevation angle again.

Claims (1)

1, a kind of tracking control unit that is used for the butterfly solar energy system is characterized in that: include single-chip microcomputer, time calendar clock, keyboard display chip, LED display board, sign-changing amplifier and be used to import the keyboard of local time, date, longitude and latitude information; Wherein:

Time calendar clock links to each other with single-chip microcomputer, sends clock signal to single-chip microcomputer;

Single-chip microcomputer links to each other with the LED display board with keyboard by the keyboard display chip, and single-chip microcomputer calculates solar angle and delivers to the demonstration of LED display board according to the key entry information and the clock information of keyboard;

The I/O mouth of single-chip microcomputer is connected with sign-changing amplifier, and single-chip microcomputer is according to the rotation of the solar angle control step motor that calculates.

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