Portable Digital gray body

• Main Authors: CHEN, KUN-KUEI, 陳坤貴
• Other Authors: CHEM, DER-CHIN
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/7gd3ra

碩士 === 逢甲大學 === 資訊電機工程碩士在職學位學程 === 107 === The main purpose of the black body furnace is used for calibration of various non-contact radiation thermometers, such as pyrometers, infrared thermometers, infrared cameras, etc. Since the black body furnace is expensive, the price ranges from 30,000 to tens of millions. If the high-precision gray body furnace can be used at low cost and the quality is not lower than the commercial products, the economic benefits are great. This study uses the 8051 microprocessor to write the PID program for precise temperature control and temperature stabilization. It replaces the commercially available PID controller and replaces the graphite heating tube with a ceramic (aluminum oxide) heater, which greatly reduces the space and heating required. Power and insulation materials replace graphite wool with graphite cotton. Asbestos is a high environmental pollution source. Graphite cotton has the same insulation effect and uses adjustable voltage. It can reach 4.88mV according to IC resolution. The smaller the scale, the smaller the temperature stability amplitude. Any relay. Understand the structure of the black body furnace, through the feasibility of the black body law in the processing of various types of radiation source cavity, and then calculate the effective emissivity formula of the cavity to design the gray body furnace system. The gray body furnace system is realized by circuit design and optical combination. As an instrument for calibration and calibration, the target of the system's steady temperature error is approached within 1%.