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Calculation method of illuminance value interpolation in hemispheric space

A calculation method and technology of illuminance value, applied in calculation, special data processing applications, instruments, etc., can solve the problems of high cost and difficult calculation, and achieve the effects of improving efficiency, good algorithm compatibility, and high reliability

Active Publication Date: 2018-06-19
永麒科技集团有限公司
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  • Description
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  • Application Information

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Problems solved by technology

Its characteristic is that the higher the n value, the smoother the fitting curve and the higher the precision of the difference, but it is accompanied by the greater difficulty of calculation and the greater the cost of implementation

Method used

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  • Calculation method of illuminance value interpolation in hemispheric space
  • Calculation method of illuminance value interpolation in hemispheric space
  • Calculation method of illuminance value interpolation in hemispheric space

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Embodiment

[0041] In the field of lighting design, in order to measure the luminous performance of the lighting source, the light intensity of the light source is often used to record the light intensity index of the light source in a certain direction in space, and the symbol for recording the light intensity is represented by I. Its numerical value is measured by a professional laboratory with professional equipment. Specifically, a space angular coordinate system centered on the light source is established. The horizontal rotation angle is C, and the vertical rotation angle is γ. When actually measuring the light intensity value of the lamp, by rotating the two angles of C and γ, use a special measuring instrument to measure the light intensity value at a series of angles, and record the value into the IES file to establish the illuminance with C and γ as coordinates Values ​​build the hemispherical space matrix.

[0042] Such as figure 2 As shown, due to the large number of numeric...

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Abstract

The present invention discloses a luminance value interpolation calculation method within a hemispherical space. The method comprises the following steps: reading an IES luminance file, reading a luminance value in the luminance file, and establishing a hemispherical spatial matrix by using a horizontal rotation angle of a light source as a horizontal angular coordinate and using a vertical rotation angle gamma of the light source as a vertical angular coordinate; acquiring a quasi-interpolation point, and determining a position of the quasi-interpolation point in the hemispherical spatial matrix; and if the quasi-interpolation point is in an intermediate region of the hemispherical spatial matrix, calculating a luminance value through interpolation by using a quadratic curve method, and if the quasi-interpolation point is in a boundary region of the hemispherical spatial matrix, calculating the luminance value through linear interpolation. The method provided by the present invention is capable of providing an algorithm for calculating the luminance value on any surface and any point at 0-360 DEG within the hemispherical space, and is further capable of achieving simple, convenient and efficient calculation effects at relatively low costs with sufficient precision being provided, thereby facilitating real-time calculation on thin clients such as mobile phones and tablets.

Description

technical field [0001] The invention belongs to the field of testing the luminous intensity of a light source of an LED lamp, and relates to an interpolation calculation method for an illuminance value in a hemispherical space. Background technique [0002] For each LED lamp, its luminous intensity has been fixed in the spatial distribution attribute since the design and finalization of production, which has become an important component of its product attributes. In order to describe this attribute information, the existing light source luminous intensity test method is to test the light intensity of fixed discrete position points, and these discrete position points are distributed according to the hemisphere in terms of spatial distribution, and the center of the sphere is the luminous light source , the hemispherical cross-section is parallel to the plane of the lamp substrate through the luminescent light source. The data saved in the IES file is the luminous intensity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G01M11/02
Inventor 杨方勤张伟郑成龙吴坚刘继胜张良辛凯
Owner 永麒科技集团有限公司
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