共查询到20条相似文献,搜索用时 109 毫秒
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为实现自动检定气相色谱仪温度参数,设计了一套新型的温度自动检定系统。给出了温度数据采集仪的组成和模块设计,采用Android Studio开发环境,串口通信技术,完成了Java编程的Android手机端应用软件,实现了温度的测量和气相色谱仪的柱箱温度稳定性、程序升温重复性检定结果的自动检定。最后通过计量校准对温度数据采集仪准确性进行验证,在测量范围内示值误差均小于0.3℃,证明了该设计的可行性。与传统的检定方法相比,本文设计的气相色谱仪温度自动检定系统提高了工作效率,为检定人员减负减压。 相似文献
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本文介绍实验室自动校准型电导率四电极测试技术 ,自动校准电导率仪检定方法及电计检定方法的可能性验证。 相似文献
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本文所介绍的智能扭矩扳子的设计符合扭矩扳子检定仪便携化、智能化的发展趋势。其具有的自动调零、自动校准等技术保证了其测量的正确性。总体设计在保证准确度的前提下减低功耗,微观上,硬件设计和软件算法设计保证了其智能化、便携化特点的实现。 相似文献
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本文结合便携式动态轴重仪的实际校准工作,以JJF 1212-2008《便携式动态轴重仪校准规范》为基础,进行分析与实验,提出了一种配合以电子汽车衡为平台对便携式动态轴重仪,进行静态及动态的校准方法,该方法对便携式动态轴重仪的校准工作具有一定的参考价值。 相似文献
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Gryniewicz-Ruzicka CM Arzhantsev S Pelster LN Westenberger BJ Buhse LF Kauffman JF 《Applied spectroscopy》2011,65(3):334-341
The transfer of a multivariate calibration model for quantitative determination of diethylene glycol (DEG) contaminant in pharmaceutical-grade glycerin between five portable Raman spectrometers was accomplished using piecewise direct standardization (PDS). The calibration set was developed using a multi-range ternary mixture design with successively reduced impurity concentration ranges. It was found that optimal selection of calibration transfer standards using the Kennard-Stone algorithm also required application of the algorithm to multiple successively reduced impurity concentration ranges. Partial least squares (PLS) calibration models were developed using the calibration set measured independently on each of the five spectrometers. The performance of the models was evaluated based on the root mean square error of prediction (RMSEP), calculated using independent validation samples. An F-test showed that no statistical differences in the variances were observed between models developed on different instruments. Direct cross-instrument prediction without standardization was performed between a single primary instrument and each of the four secondary instruments to evaluate the robustness of the primary instrument calibration model. Significant increases in the RMSEP values for the secondary instruments were observed due to instrument variability. Application of piecewise direct standardization using the optimal calibration transfer subset resulted in the lowest values of RMSEP for the secondary instruments. Using the optimal calibration transfer subset, an optimized calibration model was developed using a subset of the original calibration set, resulting in a DEG detection limit of 0.32% across all five instruments. 相似文献
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An automatic calibration instrument was developed to improve the calibration accuracy of acoustic emission (AE) instrumentation. The instrument facilitates calibration by automatically displaying the maximum value of the stress used to produce AE calibration pulses and the AE pulse. A repeatable AE signal was generated by breaking a graphite rod on the test assembly. By measuring the breaking load of the rod and the maximum root-mean-square values of the resulting AE signals, a relative calibration of the AE measurement system was achieved. Low-noise amplifiers and filters were developed to improve the sensitivity of AE measurements by more than one order of magnitude over commercially available instruments; thus, the smaller signals obtained in parts testing can be detected 相似文献
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《IEEE transactions on instrumentation and measurement》1973,22(4):343-347
Reliable measurement values require constant attention to the performance of the instruments. Great benefits would be achieved if the instruments had built-in fail-safe automatic check procedures. A new principle has been developed for automatic checking and calibration of a digital voltmeter. The entire instrument from the input terminals to the display is included in the check. To check the reference voltage two references are used, and they are automatically compared to each other. For each measurement value the instrument simultaneously checks itself. A simple single ramp voltmeter has been equipped with this self-checking device, and very promising results have been achieved. 相似文献
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A. M. Onishchenko 《Measurement Techniques》1993,36(10):1107-1111
An optimal (minimum-error) instruments calibration technique based on the method of least squares and on correction with comparable argument and function errors is described. Expressions are derived for calculating linear regression coefficients and calibration errors. The process of calibration when the instrument signals are nonlinear functions of the measured parameter and when the measurement error is different at different points of the measurement range is discussed. Calibration of an instrument operating in an automatic control system for maximum factory benefit is cited as an example.Translated from Izmeritel'naya Tekhnika, No. 10, pp. 26–28, October, 1993. 相似文献
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Corra Alegria E. Cruz Serra A. 《IEEE transactions on instrumentation and measurement》2000,49(1):94-99
This paper presents an automatic calibration system capable of calibrating measuring instruments that do not have a digital interface. Image analysis algorithms are used to automatically determine the instrument reading. It can be used with analog and with digital displays. The maximum uncertainty in the detection of the pointer's position in analog instruments is less than the human eye can discriminate 相似文献
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介绍基于MSC1200的温湿度自动校准系统。以JJF 1101-2003《环境试验设备温度、湿度校准规范》为设计依据,硬件以美国TI公司的MSC1200作为测量、信号处理以及通信核心部件,组成一套多通道高精度温湿度采集仪。按照校准规范的要求设计专用的校准软件,通过RS232接口与温湿度采集仪通信,将测量数据进行显示、绘图、存储,计算并自动生成满足要求的原始记录及校准报告,从而实现校准过程程序化、规范化、自动化,满足计量部门对环境试验设备温湿度校准的需要。 相似文献