This article studies the key technical parameters such as “short wavelength boundary,” “energy density,” “energy output uniformity,” and “pulse duration” of xenon light source equipment for therapeutic use, determines the measurement standard, and presents an applicable metrological performance evaluation method for the equipment. The evaluation procedure presented in this article has been performed on several typical types of xenon light source equipment for therapeutic use widely used in China, and the experimental results show that the evaluation method presented in this article is scientific and effective, and can be adopted for the periodic calibration of the equipment, in order to establish the metrological traceability system of the equipment.
This article adopts comparative measurement means to realize the intelligent measurement of gauge blocks through micro range high-precision inductance sensor based on the principle of inductance micrometer. The gauge block intelligent measurement system mainly includes intelligent detection system and data management system. The experimental results of indication error, measurement repeatability and time drift of the measurement system show that the system can measure gauge blocks with high accuracy and efficiency.
Continuously Operating Reference Station (CORS) is an integrated service system constructed based on multi-base station network Real Time Kinematic (RTK) technology. CORS system is composed of several fixed and continuously operating GNSS reference stations which form a network automatically providing different types of GNSS observations such as carrier phase and pseudorange, various correction numbers, status information and other GNSS services through computers, data communication and Internet (LAN/WAN) technology. This article selects an appropriate location and sets up a reference station to receive Beidou, GPS, GLONASS satellite data basing on CORS system, establishes an All-Terrain inspection field, designs a set of mobile positioning terminals, and develops a set of real time inspection software for the calibration of navigation products. Experimental verification results shows that the calibration system designed by this article is applicable to calibrate navigation products and worthy of extensive promotion.
This article presents a novel design of reference optical simulator and physical calibration method for optical performance evaluation of real-time fluorescent quantitative PCR analyzer in order to substitute for traditional chemical method. The optical simulator is designed according to the working principle, and technical characteristics such as fluorescence peak height consistency among channels, linear sensitivity factor, fluorescence intensity repeatability, and linear correlation coefficient of fluorescence of real-time fluorescent quantitative PCR analyzer.The calibration results of 5 typical types of real-time fluorescent quantitative PCR analyzers show that the reference optical simulator presented in this article can well simulate different fluorescent dyes. The reference optical simulator can meet the requirements of fluorescent intensity calibration for real-time fluorescent quantitative PCR analyzers with the advantages of good applicability, high convenience and accurate and reliable measurement results.
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