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Sunshine duration measuring method and sunshine duration measuring device

A measurement method and technology of measurement device, which are applied in measurement device, sunshine time recorder, meteorology and other directions, to achieve the effects of high automation level, simple structure and high measurement accuracy

Active Publication Date: 2013-10-09
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the defects of the existing sunshine duration measurement, the present invention provides a new type of sunshine duration measurement method and sunshine duration measurement device which adopt different principles and technologies from the existing sunshine duration measurement

Method used

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  • Sunshine duration measuring method and sunshine duration measuring device
  • Sunshine duration measuring method and sunshine duration measuring device
  • Sunshine duration measuring method and sunshine duration measuring device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] figure 1 It is a structural schematic diagram of the first embodiment of the sunshine hours measuring device of the present invention. As shown in the figure, the sunshine hours measuring device includes an arc-shaped illuminated target 1, a plane light and shadow display surface 2 located below the illuminated target 1, and a light and shadow display surface 2 located at the top of the arc-shaped illuminated target 1. Photoelectric image acquisition device 3, and, the computer image information processing system 4 that is electrically connected with described photoelectric image acquisition device 3; On described circular arc surface shape illuminated target object 1, the shaded part is shown as the shading part, and the rest are is the translucent part.

Embodiment 2

[0043] see figure 2 . figure 2 The sunshine duration measuring device in the figure 1 The only difference is that the light-transmitting part and the light-shielding part in the arc-shaped illuminated object 1 are interchanged. figure 1 The area of ​​the shading part is much smaller than the area of ​​the light-transmitting part, and figure 2 in is the opposite.

Embodiment 3

[0045] Figure 3a It is a schematic diagram of the third embodiment of the sunshine hours measuring device of the present invention, Figure 3b is its cross-section. The feature of this embodiment is that the light and shadow display surface 2 has the same surface shape as the illuminated object 1 and the distance is very close: the illuminated object 1 adopts a circular arc surface shape, and there are light-transmitting parts and light-shielding parts on it; the light and shadow display surface 2 has The arc shape is the same as that of the irradiated object 1. In this example, the light and shadow display surface 2 adopts a frosted glass surface; the photoelectric image acquisition device 3 is located below the arc-shaped light and shadow display surface 2; 4 is a computer image processing system.

[0046] In order to prevent external light from interfering with light and shadow image acquisition, a light-tight casing ( Figure 3b as shown by the hatching in ).

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Abstract

The invention discloses a sunshine duration measuring method which comprises the following steps that a shadow display surface for receiving the projection of an irradiated object is configured under the irradiated object with a light transmission part and a shading part; a photoelectric image acquirer is used for acquiring a shadow image projected on the shadow display surface and transmitting the shadow image to a computer; and an image information processing system in the computer is used for distinguishing the definition and darkness of the shadow image so as to judge a sunshine condition which is directly irradiated by the sunshine and has light intensity over a certain threshold value and to record a relative moment, thus obtaining the sunshine duration. The invention further discloses a sunshine duration measuring device corresponding to the method. By acquiring and distinguishing the shadow image, the sunshine condition can be accurately monitored in real time and the sunshine duration can be given out. The sunshine duration measuring device is simple in structure and convenient for installation and maintenance without a mechanical rotation error and a spectrum error; and the measurement cannot be influenced by an external environment temperature and moisture condition; the sunshine duration device is high in automaticity.

Description

technical field [0001] The invention relates to the field of meteorological observation, in particular to a method for measuring sunshine hours and a device for measuring sunshine hours. Background technique [0002] The measurement of sunshine hours is one of the basic services of meteorological stations. According to the standards formulated by the World Meteorological Organization (WMO for short), the sunshine hours are the sum of the subsections during which the direct solar irradiance (that is, the intensity of light) exceeds the specified light intensity threshold in a day. That is, the weather conditions for recording sunshine time in meteorology need to meet the following two conditions at the same time: one is to meet a certain sunshine intensity, that is, to meet or exceed the light intensity threshold defined by the WMO standard; the other is to have direct sunlight. [0003] In order to meet the needs of this kind of meteorological measurement, a variety of devi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01W1/12
CPCY02A90/10
Inventor 张卫平黄冠琅肖钰斐罗庭军
Owner GUANGXI UNIV