Ultraviolet accelerated weatherometer calibration device and measuring method thereof
A technology of a calibration device and an aging box, applied in the field of irradiation, can solve the problems of inability to accurately measure the true irradiance, high equipment prices, changes in electrical signals, etc., to avoid measuring the true irradiance and avoid inaccurate measurements The effect of true irradiance
Pending Publication Date: 2017-07-14
广州合成材料研究院有限公司
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Problems solved by technology
Foreign manufacturers provide matching UV aging box calibration devices, which are limited to the use of several foreign photoaging equipment, and the equipment prices are high and sales are controlled. Only the purchase of its aging box products can be used to purchase irradiance calibration devices.
[0004] Existing ultraviolet radiation meters mainly use optical probes to detect light to generate electrical signals, and then the electrical signals are amplified and filtered by the signal processing circuit, and then displayed on the display screen; The probe generally has temperature drift phenomenon, that is, the generated electrical signal will change with the change of temperature, so the real irradiance cannot be accurately measured for the temperature range in the UV aging chamber
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[0028] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0029] refer to figure 1 , a kind of ultraviolet aging box calibration device, comprises probe and host computer, and described probe includes ultraviolet transmission filter and photoelectric conversion module, and described photoelectric conversion module is connected with host computer; Measured optical signal passes through ultraviolet transmission filter After optical filtering, the infrared and most of the visible light are filtered out, and the filtered optical signal is converted into a weak electrical signal by the photoelectric conversion module.
[0030] Further as a preferred embodiment, the host includes a central controller, a pre-amplification buffer circuit, a low-pass filter circuit, an AD conversion module, and a digital low-pass filter. The buffer circuit, the low-pass filter circuit, the AD conversion module and the digital lo...
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The invention discloses an ultraviolet accelerated weatherometer calibration device and a measuring method thereof. The device of the invention comprises a probe and a main unit. The probe comprises an ultraviolet-transmitting filter and a photoelectric conversion module, which is connected to the main unit. After optical filtering of a signal of detected light through the ultraviolet-transmitting filter, infrared and most visible light are filtered out; an optical signal obtained after the filtration is converted into a weak electric signal for processing through the photoelectric conversion module, so as to measure irradiance; and lower cut-off frequency is obtained through multistage hardware filtering and digital filtering while various interferences are filtered out, so as to avoid the case that real irradiance cannot be measured accurately because of temperature variation. The ultraviolet accelerated weatherometer calibration device and the measuring method thereof can be widely applied in the field of irradiation technology.
Description
technical field [0001] The invention relates to the technical field of irradiation, in particular to a calibration device for an ultraviolet aging box and a measurement method thereof. Background technique [0002] In the artificial acceleration test of polymer material aging, the most significant light bands for material aging are distributed between 250nm and 800nm, that is, the ultraviolet band (250nm-400nm) and the colored light band (400nm-800nm). Among them, the ultraviolet band has the most significant aging effect on polymer materials, which is usually reflected in the destruction of molecular chains. Therefore, as one of the main photoaging methods, ultraviolet light sources need accurate measurement and adjustment of irradiance to analyze the aging process of polymers and its results. International standards such as ISO4892 and national standards GB16422 both regulate ultraviolet Quantified value. The light sources used in the UV aging box include UVA, UVB, and U...
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IPC IPC(8): G01N17/00G01J1/00
CPCG01J1/00G01N17/004
Inventor 高祥周彦宇孙耿鹏
Owner 广州合成材料研究院有限公司