CN103149946A - Array type lens group directional reflex control system - Google Patents

Abstract

The invention discloses an array type lens group directional reflex control system. The main contents of the array type lens group directional reflex control system comprise a microcontroller, a polar shaft and a pitching motor driver, a polar shaft and a pitching drive device, a polar shaft and a pitching motor, a lens group fine tuning motor, a sensor (comprising sunlight, wind speed and the like), a limit switch and the like. The microcontroller is connected with a sunlight sensor receiver, a wind speed signal receiver, a limit signal receiver and a communication interface through an optoelectronic isolation. At the same time, the microcontroller is further provided with a liquid crystal display (LCD) display device, a time corrective module and a manual input device. A reflecting face of a heliostat is formed by sub lenses, wherein the sub lenses are arranged in three rows or more than three rows and three arrays or more than three arrays. The heliostat can be used for tracking the sun and spotlighting. The system has an automatic reset function after the sunset, an automatic level-recovering function when strong wind comes and the like. Locations can be always initiated at random. Sunlight lines can be automatically searched and continuously tracked. The system is low in power consumption, high in track precision and high in cost performance. The system is simple and good in reliability.

Description

Array mirror group orienting reflex control system

Technical field

The present invention relates to application of solar, particularly array mirror group orienting reflex control system.

Background technology

World energy sources is increasingly exhausted, and the development and utilization of regenerative resource has a extensive future, and is comprehensive, to utilize sun power expeditiously be the target that the stakeholder pursues.Photovoltaic power generation apparatus utilizes solar panel to accept solar light irradiation, is electric energy with transform light energy.Aberration is the judgement key concept good and bad with analyzing focusing.Say roughly, aberration is exactly the difference of actual hot spot and ideal focusing imaging facula.If incident light is strict directional light, desirable hot spot can be a geometric point.Consider sun disk effect, optimal spot is that radius equals the round spot that the focus lamp focal length multiply by the light beam subtended angle.Aberration under actual conditions may have multiple source.Traditional solar tracking mode (orientation+elevation angle) often has sizable aberration.

Just in order to alleviate this problem, people replace single minute surface with primary mirror+a plurality of from mirror, but each also has the rotating shaft of two independent rotation from mirror, to adjust the minute surface normal direction.Because the astigmatism degree is proportional to the high power of off-axis distance, hot spot disperse and elongation when this can dwindle oblique incidence effectively, but greatly increased the complicacy of system.If line up the capable N row of M from mirror, total 2M * N of the independent rotating shaft of whole condenser, a considerable number of.Because the condenser general frame adopts orientation+elevation tracking mode, no matter how to arrange from mirror, each is not identical with optics meridian relation of plane from mirror, and constantly changes, and the rotating manner of independent rotating shaft is also very complicated.

Summary of the invention

Problem for prior art exists the invention provides array mirror group orienting reflex control system, and optically focused is than the characteristics high, that tracking accuracy is high.

For achieving the above object, array mirror group orienting reflex control system comprises microcontroller, pole axis and pitching motor driver, pole axis and elevating gear, pole axis and pitching motor, mirror group fine setting motor;

Microcontroller is isolated connecting sensor by photoelectricity, and microcontroller also is provided with LCD display device, time adjustment module and manual input device simultaneously, and described microcontroller also is provided with elevation direction driver and X direction driver;

Described elevation direction driver and X direction driver drive respectively direction motor separately;

Described array mirror group is by motor and gearing interlock;

The reflecting surface of heliostat by 3 row or above and 3 row or above sub-mirror form, heliostat can be followed the tracks of simultaneously the sun and carry out optically focused, this system have automatically reset after the sun falls, auto back equality function when high wind arrives, can start round-the-clock optional position, the energy automatic search is to sunray and continue tracking, this system power dissipation is little, tracking accuracy is high, and cost performance is high, and system is simple, good reliability.

In said system, sub-mirror can optically focused, and all is all movable from mirror, before heliostat is followed the tracks of the sun, can rotate in the direction of row and column from mirror, to adjust the focus of heliostat, all focuses from mirror is overlapped with primary mirror.

In said system, heliostat has spin axis and elevation angle rotation axis, adopts spin to add elevation angle tracking and follows the tracks of the sun, and wherein rotation axis rotational angle theta in the elevation angle is:

$\mathrm{\θ}=\frac{\mathrm{\π}}{4}-\frac{1}{2}\arcsin \left\{\begin{array}{c}-\cos \mathrm{\δ}\cos \mathrm{\ω}(\sin \mathrm{\λ}\cos \mathrm{\Φ}+\cos \mathrm{\λ}\cos \mathrm{\φ}\sin \mathrm{\Φ})-\cos \mathrm{\δ}\sin \mathrm{\ω}\cos \mathrm{\λ}\sin \mathrm{\φ}\\ +\sin \mathrm{\δ}(\cos \mathrm{\λ}\cos \mathrm{\φ}\cos \mathrm{\Φ}-\sin \mathrm{\Φ}\sin \mathrm{\λ})\end{array}\right\}---\left(1\right)$

Spin axis corner ρ is:

$\mathrm{\ρ}=\arcsin \left(\frac{-\cos \mathrm{\δ}\cos \mathrm{\ω}\sin \mathrm{\φ}\sin \mathrm{\Φ}+\cos \mathrm{\δ}\sin \mathrm{\ω}\cos \mathrm{\φ}+\sin \mathrm{\δ}\sin \mathrm{\φ}\cos \mathrm{\Φ}}{\sin 2\mathrm{\θ}}\right)---\left(2\right)$

Description of drawings

Fig. 1 track, sensor mixing control principle drawing.

Fig. 2 control structure block diagram of the present invention.

Fig. 3 carries out with the motion of row and column the key diagram that the first order differs correction.

In figure: from mirror 9 heliostat 10 primary mirrors 11

γ _n, the corner 5 of the rotating shaft of sub-mirror column direction

σ _n, the corner 7 of the rotating shaft of mirror line direction

The vertical range 6 of the rotating shaft of sub-mirror column direction and primary mirror central point

The vertical range 8 of the rotating shaft of sub-mirror line direction and primary mirror central point

Embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.

At first, adjusting respectively makes it overlap with primary mirror from the focus of mirror.Take the five-element five row totally 25 slice, thin piece mirrors as example explanation adjustment process.The first step, rotation x ₁Axle and x ₅Axle gathers to the x axle 1 row and 5 row focuses, second step, rotation x ₂Axle and x ₄Axle gathers to the x axle 2 row and 4 row focuses, the 3rd step, rotation y ₁Axle and y ₅Axle gathers to the y axle 1 row and 5 row focuses, the 4th step, rotation y ₂Axle and y ₄Axle gathers to the y axle 2 row and 4 row focuses, and all focuses from mirror all overlap with the primary mirror focus like this.

Drive heliostat by gear train and follow the tracks of the sun, initial alignment is carried out in position to heliostat, and then compare with the feedback signal of photoelectric sensor, and then tracing deviation is formed correction, a kind of tracking on a large scale at this process Program control section, sensor forms accurate tracking in conjunction with the relative position of current heliostat and the sun again, and this control mode is actually take programmed control as main, adopts the instantaneous feedback of sensor that programme controlled cumulative errors is revised.

In a word, the invention provides array mirror group orienting reflex control system, can be used for large-scale outdoor system for tracking, also can be used for unmanned energy acquisition station.

Claims (3)

1. array mirror group orienting reflex control system, microcontroller is isolated connecting sensor by photoelectricity, microcontroller also is provided with LCD display device, time adjustment module and manual input device simultaneously, it is characterized in that, described microcontroller also is provided with elevation direction driver and X direction driver;

2. array mirror group orienting reflex control system as claimed in claim 1, is characterized in that, elevation direction driver and X direction driver drive respectively direction motor separately.

3. array mirror group orienting reflex control system as claimed in claim 1, is characterized in that, array mirror group is by motor and gearing interlock.

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