المعايير الطيفية الدولية وتصنيف المحاكيات الشمسية？

تكمن الاختلافات الأساسية بين ضوء الشمس الطبيعي ومصادر الضوء الاصطناعي في تركيبها الطيفي وإشعاعها. This difference can be corrected through filters (such as xenon lamp light matching technology) to achieve spectral approximation. In the 1970s, ERDA and NASA established basic standards for terrestrial photovoltaic testing. Research in 1975 و 1977 further developed standardized procedures for solar simulators and photovoltaic measurements.

 

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International Standards for Solar Simulators

Currently, the commonly used Standard Test Conditions (STC) specify: irradiance of 1000 ث / م², spectrum of AM 1.5, and ambient temperature of 25°C. Commercial equipment primarily adheres to ASTM standards, and its application scenarios include terrestrial and space-based radiation simulation. Internationally recognized terrestrial photovoltaic testing standards include ASTM E927-05, JIS C 8912, and IEC 60904-9. All of these evaluate three key metrics: spectral matching, spatial nonuniformity, and temporal instability. IESNA defines spectral power distribution (SPD) as the radiant power distribution of a light source at each wavelength in the visible light region, expressed in W/nm.

The surface distribution of solar irradiance is affected by geographical and temporal factors. Its propagation path is quantified by the atmospheric mass factor (AM), as follows:

AM = L/L0 = 1/cosθZ (θ_Z is the zenith angle).

 

When the sun is at the zenith, AM = 1.0; at a zenith angle of 48°, AM = 1.5; at a zenith angle of 60°, AM = 2.0. This factor is a core parameter for spectral calibration.

The solar spectrum is divided into ultraviolet (<400 نانومتر), الضوء المرئي (400-760 نانومتر), والأشعة تحت الحمراء (>760 نانومتر) by wavelength. The CIE further subdivides ultraviolet light into UV-A (315-400 نانومتر), UV-B (280-315 نانومتر), and UV-C (100-280 نانومتر), providing a clear basis for light source selection.

Solar Simulator Classification

 

ASTM E927 and IEC 60904-9 classify solar simulators into three categories: أ, B, and C. These classifications are based on spectral matching, spatial nonuniformity, and temporal instability, with Category A being the highest and Category C being the most basic.

Spectral matching (SM) measures the closeness of the actual spectrum to the standard spectrum. The formula is:

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This metric directly impacts the consistency between the test and actual operating conditions.

Spatial nonuniformity (SNU) evaluates the uniformity of the irradiance distribution. The formula is:

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(E_max is the maximum irradiance, E_min is the minimum irradiance)

Its core function is to prevent “hot spots” on photovoltaic cells caused by localized light concentration. This is particularly crucial for test repeatability in large-area simulators.

عدم الاستقرار الزمني (TIS) reflects irradiance fluctuations during the test. Its calculation method is similar to spatial inhomogeneity, but it applies to time series data at fixed points. Although it has less impact on the measurement results, it is still a necessary parameter for grading.

Grade Index Range:

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Solar Simulators Classified by Performance

Class A: Spectral matching 0.75-1.25, spatial nonuniformity ≤2%, temporal instability ≤2%, suitable for high-precision calibration and R&D testing;

Class B: Spectral matching 0.6-1.4, spatial nonuniformity ≤5%, temporal instability ≤5%, suitable for routine module mass production testing;

Class C: Spectral matching 0.4-2.0, spatial nonuniformity ≤10%, temporal instability ≤10%, suitable for preliminary evaluation or teaching demonstrations.

The grading system provides clear guidance for device selection. على سبيل المثال, Class A devices require precise optical design to achieve high-precision matching across a wide spectrum. The technical approaches chosen for devices in different grades must be deeply adapted to the application scenario.

International spectral standards and grading for solar simulators lay the foundation for standardized development in the industry. As an innovator in solar simulator technology, Heyi led module strictly adheres to these standards with its full-spectrum LED, halogen, and xenon lamp products, covering performance requirements at levels A, B, and C. These products provide a controllable solar simulation environment for a wide range of fields, helping various industries achieve efficient development through technological innovation.

Heyi led module 3A AAA Grade Solar Simulator

 

The Heyi led module 3A AAA solar simulator utilizes advanced beam collimation technology and a highly uniform light spot design to accurately replicate the AM1.5G solar spectrum and provide stable irradiance output, providing laboratories with an efficient and reliable lighting testing solution.

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AAA-Grade Performance: Spectral matching complies with the IEC 60904-9 standard, achieving laboratory calibration accuracy.

Long-Term Stability: Optimized light source design significantly reduces maintenance frequency, calibration and downtime, and improves experimental efficiency.

Application Scenarios: Optional optical filters flexibly simulate indoor and outdoor sunlight environments to meet diverse testing needs.

As an innovator in light source calibration, the Heyi led module 3A AAA-Grade solar simulator utilizes beam collimation technology and has been used in high-end applications such as photovoltaic laboratories and aerospace. في المستقبل, Luminbox will develop a multi-physics collaborative calibration platform, using machine learning to optimize processes, shorten calibration cycles, and ensure that core indicators such as spectral matching maintain AAA levels according to the IEC 60904-9 standard.

#International Spectral Standards for Solar Simulators #Solar Simulator Classification #HEYI LED & Control Luminbox Solar Simulator #Simulated Solar Light Environment