共查询到20条相似文献,搜索用时 109 毫秒
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针对使用中的大口径热量表无法实现定期离线检定的情况,文章提出了一种热量表在线校准方案,对热量表在线校准装置的构成和热量表在线校准的工作原理进行了详细阐述,通过设置标准流量计的稳定性试验,进而保证了热量表在线溯源的过程是科学有效的,热量表在线校准方案的实施对提升热量表的检测率、完善量值传递与溯源有重要意义. 相似文献
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基于ISO国际标准设计了碰撞式高精度低冲击加速度校准装置,在冲击加速度峰值20~10000 m/s2,冲击脉宽0.5~10 ms范围内实现产生半正弦波形的冲击加速度传感器的高精度校准.介绍了校准装置的构成和工作原理,通过与冲击加速度国家基准的比对,结果表明本装置可实现0.5%(k=2)的冲击加速度校准不确定度.本装置提... 相似文献
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为了实现对飞机电源试验台电气参数测试系统计量校准的需求,研制了一种以STM32微控制器为核心,用于校准飞机电源试验台电气参数测试系统的基准电压信号源.该基准电压信号源能够输出范围为±10 V,最小步长为0.019 mV,量化误差为9.5μV,且幅值可调的高精度电压信号.实验测试结果表明,基准电压源能够输出幅值、周期持续时间和波形参数都满足校准要求的信号.由该基准电压信号源构成的校准设备不仅能够满足飞机电源试验台电气参数测试系统测量准确性和溯源性的计量校准要求,还能够大幅提升飞机电源试验台电气参数测试系统的校准效率. 相似文献
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An automated thermocouple calibration system 总被引:2,自引:0,他引:2
An automated thermocouple calibration system (ATCS) was developed for the unattended calibration of type-K thermocouples. This system operates from room temperature to 650°C and has been used for calibration of thermocouples in an eight-zone furnace system which may employ as many as 60 thermocouples simultaneously. It is highly efficient, allowing for the calibration of large numbers of thermocouples in significantly less time than required for manual calibrations. The system consists of a personal computer, a data acquisition/control unit, and a laboratory calibration furnace. The calibration furnace is a microprocessor-controlled multipurpose temperature calibrator with an accuracy of ±0.7°C. The computer software is menu-based for flexibility and ease of use. The user needs no programming experience to operate the system 相似文献
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本文介绍了一种表面温度传感器的动态校准系统,对动态校准的过程作了简单的描述,并着重描述了系统静态标定的过程,文章最后还给出了对一种表面温度传感器的系统静态标定的结果。 相似文献
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目前CNC机床在线测量系统的校准方法在国内有用激光干涉仪、标准量块等一些用于企业的针对性方法,缺少适用于计量校准机构的校准方法,本文根据该系统的工作原理,对CNC机床在线测量系统的校准方法进行研究,提出几项计量特性参数,并结合实际情况设计了校准方案,研制了校准用计量标准器,分析了数据的处理方法.经研究表明,本文的校准方... 相似文献
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介绍了一种真空规原位置校准的设备,以及原位置校准技术研究,该装置具有结构简单、实用、不确定度小等优点,同时可以满足真空规的在线原位校准。 相似文献
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概述了民用飞机电源系统发展趋势,针对变频交流电源系统,结合国内外研究现状,阐述了民机变频交流电源供电特性测试系统校准技术研究的意义.依据变频交流电源供电特性测试系统的技术要求,研究了校准方法并编写了校准规范;基于直接数字频率合成(DDFS)、直接数字波形合成(DDWS)、宽带信号放大和滤波等技术,研制了变频交流电源供电... 相似文献
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A calibration technique for a time domain reflectometry and transmission (TDR and TDT) measurement system as applied to network analysis is presented. The calibration corrects for the errors caused by the response of the measurement system. A complete physically-based model is established for the system. A set of calculable standards is developed to satisfy the time domain requirements for calibration. The calibration technique was applied to determining the model parameters of a commercial TDR and TDT system. The calibration enhanced the system bandwidth from 8 GHz to about 20 GHz. Experimental verification is given to demonstrate the validity and accuracy of the calibration technique 相似文献
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Carullo A. Corbellini S. Grassini S. 《IEEE transactions on instrumentation and measurement》2007,56(4):1212-1218
The increasing diffusion of pollutant measuring units, which are installed over wide areas, along with the short calibration interval of several sensors for pollutant quantities, requires new calibration infrastructures to be developed. This paper describes an attempt to develop an innovative calibration system which is based on traveling standards and which does not require units to be removed from the measuring site during the calibration process. The calibration system is based on a traveling standard, which is composed of one or more cylinders that contain gas mixtures, a cell with standard sensors, and a control unit with networking capabilities, which allows the traveling standard to be remotely exercised. A prototype of the proposed system is described and the preliminary results reported. 相似文献