Radiometrische Bandwaage mit Rechnerschaltkreis zur Signalaufbereitung

Es wird eine radiometrische Bandwaage zur Koksaustragsmengen-Messung in BHT-Kokereien beschrieben. Voranstellend werden einige analytische Ausdrücke zur theoretischen Behandlung dieses Bandwaagentyps mitgeteilt. Die Waage zeichnet sich durch hohe Stabilität der Anzeige, durch die Möglichkeit des routinemäßigen Umsetzens von Meßstelle zu Meßstelle innerhalb kurzer Zeit und durch einen relativ kleinen Wägefehler (Meßunsicherheit ≦ 2,9%) aus. Die Signalaufbereitung innerhalb der Elektronik erfolgt durchgängig digital unter Verwendung eines Rechnerschaltkreises.     

Sampling Issues in Assessing Particle Degradation in Pneumatic Conveying Systems

The evaluation or design of a granular material handling process requires reliable data if executive decisions are to be made. Material behavior in a given process is usually investigated by collecting and analyzing material samples from different locations within the system. However, sampling can be a significant source of errors, as a poor sampling method can lead to measurements not truly representative of the real process.     

Leberfunktionsuntersuchungen mit dem [15N]Ammoniumtest

In laboratory tests a method was developed for a non-contacting moisture gauging on conveyor belts of different materials like coal, clay, industrial slay and stones of inflating clay. The moisture was measured with an ²⁴¹ Am-Be-neutron source, the absolute necessary determination of the changing flow of material was made with the gamma rays of ¹³⁷Cs or ²⁴¹Am. The analysis of the records shows, that to all measuring values mathematical defined curves could be found, so that methods of calculation for the moisture content could be deduced. The maximal obtainable accuracy is about ±0.5 percentage by weight. With the industrial slay and the stones of inflating clay supplementary tests were made direct on the conveyor bell. They shows, that also in the practice good results can be obtained.     

Radiometric Mass Estimation of Materials Transported by Belt Conveyors

On the basis of economical importance of mass determination of material streams, especially in agriculture, the radiometric measuring principle was proved as the priority solution for estimation of the transported masses. Optimal arrangements of sources and detectors with a minimum influence of material cross distribution on the weighing processes were found by theoretical and experimental studies. This radiometric conveying mass gauge was subjected to a serial of tests under research and agricultural conditions. The influence of various factors (e.g. moisture content, crude ash content, kind of agricultural material) was studied.     

基于电流传输器的网格多涡卷混沌电路设计与实现

提出了一种利用同相电流传输器(CCⅡ+)实现网格多涡卷混沌吸引子的方法.首先,构建一个三维网格多涡卷混沌系统,并对该系统进行基本动力学特性分析.其次,在考虑电流传输器端口寄生参数的情况下,构建了电流输出的饱和函数电路并设计一个具有串联结构的网格多涡卷混沌电路,使得该电路的工作频率得到提高.最后,通过硬件电路实验验证了该方法的可行性.