Revealing of major factors in the directional thermal radiation of ground objects——A new way for improving the precision of directional radiant temperature measuring and data analysis

This paper is devoted to eliminating the noise from the measuring of directional thermal radiation for ground objects. Specifically, we think that the noise is mainly due to the variance of components in the field of view of the sensor with the view angle changing and to the heat balance change on the ground during the period of measurement. The authors present two new observation methods named as "constant area method by thermal camera" and "concurrent method by dual sensors" respectively. The experiments show that the data obtained by these methods abide by some regularly directional distribution, which is totally different from the data from the former methods. The analysis of the major factors in the directionality of thermal radiation is also made in the paper.     

实验室能力验证分析

能力验证是实现实验室有效管理的一个重要环节,也是实验室必须遵守的基本要求。结合一次能力验证结果进行分析,指出了能力验证对参与实验室和认证认可事业发展的重要意义。     

地表波谱比辐射率便携式测量的三种改进方法

针对便携式傅里叶变换红外光谱仪测量比辐射率的不确定性,提出了三种改进的波谱比辐射率测量方法.方法1和方法2借助于附加设备改变环境辐照度实现病态方程可解.方法3基于灰体假设,使用迭代求解获得最接近样品的真实温度的温度解,进而计算得到样品的比辐射率.使用温度测量和傅里叶光谱仪观测计算获得波谱比辐射率作为参考的比辐射率结果,对三种改进的方法进行对比和验证.结果表明,对于高比辐射率的石英板和纸板,三种改进方法的测量结果和参考值吻合较好.而对于低比辐射率的锈铁板和铝板,方法3最为接近参考比辐射率结果,而方法1,方法2由于需要过多的观测环节,存在一定的偏差.此三种方法将为改进便携式傅里叶变换红外光谱仪测量提供依据.     

基于嵌入式系统的压痕强度测定仪的设计与软件开发

基于STM32F407V系列单片机系统,以C语言为设计平台,设计开发了一种瓦楞纸的压痕强度测试仪器。该仪器具有多种功能,主要用于各类大型尺寸瓦楞纸箱的环、压痕等参数的检测与测试。该仪器用途广泛,是纸板、瓦楞纸板生产厂家、科研院校、检测机构等不可缺少的重要测试仪器。测试结果表明,该控制系统具有较高的测量精度。     

实验室能力验证分析

能力验证是实现实验室有效管理的一个重要环节,也是实验室必须遵守的基本要求。结合一次能力验证结果进行分析,指出了能力验证对参与实验室和认证认可事业发展的重要意义。     

Thermal model for discrete vegetation and its solution on pixel scale using computer graphics

In this paper, we discuss how the multi-reflection of thermal emission affects the calculation of radiation balance. With the help of computer graphics, the four components of discrete vegetation are analyzed in detail and the curves of BRDF for the discrete vegetation can be obtained as well. A new model is put forward to inverse the temperatures of four components. The solution obtained by using computer graphics is consistent with observations in the field experiment in Yucheng Remote Sensing Comprehensive Site of CAS. Furthermore, the method can be used to retrieve land surface temperature based on multi-angle thermal infrared remotely sensed data.     

纸张白度颜色测定仪的开发

针对物体表面色度、白度等参数的测量需求,研制了一种测量物体表面色度、白度等参数的色度测定仪。该仪器采用光电积分法,以单片机控制为核心,由积分球、I/V变换电路、A/D转换器件、测量显示电路等模块构成,给出了一种光电积分式的测量方法。该仪器通过色度探测器对被测颜色光谱能量进行积分,直接获得目标的三刺激值。结果表明,该仪器可以准确地测量试样的色度值,并通过液晶显示界面可以方便快捷地观察到测量结果。     

频闪仪及其在软包装印刷中的应用

市场竞争的激烈,印刷机械速度的不断提高,迫使软包装生产企业寻求各种方法,对印刷品表面质量进行严格的控制。频闪仪就是目前软包装行业中应用十分广泛的检测设备之一,本文就向大家介绍一下频闪仪及其在软包装生产中的应用。频闪仪的工作原理及特点频闪仪也叫频闪灯(stroboscopes),它本身可以发出短暂,频密的闪光,当我们将频闪仪的闪光频率调节到与被测物的转动或运动速度接近或同步时,被测物虽然高速运动着,但看上去却是缓慢运动或相对静止的。这种视觉暂留而产生的相对静止现象,使人眼能够轻易观测到高速运动物体     

A new measuring technique of soil thermal inertia

Thermal inertia is the function of substance density, heat capacity and heat diffusivity, and is an important parameter for researching the process of surface heat balance using remote sensing technique. In this paper, using soil heat plates, infrared thermometer, data logger and other instruments, by man-controlled changing the solar radiation status on the soil samples, the authors gave a new method to measure soil thermal inertia. Using the continuously surveying data of soil heat flux and infrared radiation temperature, thermal inertia can be calculated easily. Based on the thermal inertia calculation of three soil samples with different water content, good results were abtained by the authors, so this method is feasible. Meanwhile, this measuring technique is also a new attempt.