Design of Test System for Infrared Detector and Pre-amplifier

Chao Ye ； Fa-Lin Wu ； Yan Zhao ； Heng-Yang Zhao

《Researches and Applications in Mechanical Engineering》 2卷4期 (2013/12) Pp. 116-119

並列摘要

A test system was introduced in this article for infrared detector and pre-amplifier based on virtual instrument technology; in which an industrial PC was utilized as main control platform, and a self-design image data acquisition and processing board, a self-design channels switch control board and some general equipments were included. Using the virtual instrument software LabVIEW 2011, the system can achieve two infrared detectors and pre-amplifiers in high/low/normal temperature test. Generally, a sliding window with the 3σ principle method is used to detect blind pixels, but this method has a defect which may not detect some blind pixels. A new blind pixels detection method was proposed in this paper based on an enhanced 3σ principle to calculate the mean and the standard deviation excluding the maximum and the minimum in the sliding window. The simulation results showed that the proposed method is of high detection accuracy, fast lookup and accurate positioning, and is a more conducive method for hardware implementation. In practical applications, it has been proved that this system is not only of high testing precision with high degree of automation and fast test speed, but also able to meet the small signal μV level testing.

並列關鍵字

Infrared Detector ； Pre-amplifier ； Blind Pixel ； 3σ Principle ； Test System