A fiber-optic thermocouple sensor is proposed in this paper, which is composed of a number of optical fiber and thermocouple sensor. A signal processing circuit of the fiber-optic thermocouple sensor is designed and a...
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ISBN:
(纸本)9781479925650
A fiber-optic thermocouple sensor is proposed in this paper, which is composed of a number of optical fiber and thermocouple sensor. A signal processing circuit of the fiber-optic thermocouple sensor is designed and a cold junction compensation method is also introduced. This paper focuses on analyzing optical fiber sensor signals and the cold junction compensation method in the case of multi-channel temperature measurements. The cold junction compensation method is based on the newton iterative algorithm, which is embedded in a microprocessor. An experiment of temperature measurement is fulfilled and hence testifies the feasibility of the proposed fiber-optic thermocouple sensor and its cold junction compensation method.
The anti-counterfeiting printing which is a branch of feature printing is an anti-counterfeiting technology. Anti-counterfeiting printing technology is a measure which is used to prevent somebody unwarranted from copy...
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ISBN:
(纸本)9783642217821
The anti-counterfeiting printing which is a branch of feature printing is an anti-counterfeiting technology. Anti-counterfeiting printing technology is a measure which is used to prevent somebody unwarranted from copying, counterfeiting and imitating. Fractal graphics is applied to color printing anti-counterfeiting in this paper because of its protean shape and unpredictable color. The detailed analysis of Julia set escape time algorithm of newtoniterative method shows that the method of color printing anti-counterfeiting combined with fractal graphics has prefect anti-counterfeiting functions. No one can get the same graphics with original picture by common methods of duplicating, scanning, photographing and other measures.
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