Application of FTA Method to Reliability Analysis of Vacuum Resin Shot Dosing Equipment

1　ＩｎｔｒｏｄｕｃｔｉｏｎＦＴＡ (ｆａｕｌｔｔｒｅｅａｎａｌｙｓｉｓ)ｉｓａｎａｎａｌｙｓｉｓｍｅｔｈｏｄｂｙｗｈｉｃｈｃａｕｓｅｓｏｆａｓｙｓｔｅｍ’ｓｆａｕｌｔｓｃａｎｂｅａｎａ ｌｙｚｅｄｓｙｓｔｅｍａｔｉｃａｌｌｙｉｎｔｈｅｆｏｒｍｏｆａｔｒｅｅａｎｄｔｈｅｒｅｌｉａｂｉｌｉｔｙｏｆｔｈｅｓｙｓｔｅｍｃａｎｂｅｅｖａｌｕａｔｅｄ .Ｔｈｉｓｍｅｔｈｏｄｂｅｇｉｎｓｗｉｔｈｔｈｅｍｏｓｔｕｎｄｅｓｉｒａｂｌｅｓｔａｔｅｏｆｔｈｅｓｙｓｔｅｍａｎｄｔｒａｃｅｓｖａｒｉｏｕｓｆａｃｔｏｒｓ (ｉｎ…     

A Fuzzy Mathematics Based Fault Auto-diagnosis System for Vacuum Resin Shot Dosing Equipment

1　ＩｎｔｒｏｄｕｃｔｉｏｎＶａｃｕｕｍＲｅｓｉｎＳｈｏｔＤｏｓｉｎｇＥｑｕｉｐｍｅｎｔ(ＶＲＳＤＥ)ｉｓａｋｅｙｓｐｅｃｉａｌｅｑｕｉｐｍｅｎｔｕｓｅｄｔｏｐｅｒｆｕｓｅｖａｒｉｏｕｓｋｉｎｄｓｏｆｅｌｅｃｔｒｉｃａｌｃｏｍｐｏｎｅｎｔｓ,ｓｕｃｈａｓｓｔｒｉｋｉｎｇｗｉｎｄｉｎｇｓｏｆｖｅｈｉｃｌｅｓａｎｄｍｏｔｏｒｃｙｃｌｅｓ,ｔｒａｎｓｆｏｒｍ ｅｒｓ,ｓｅｎｓｏｒｓ,ｃａｐａｃｉｔｏｒｓａｎｄｓｏｏｎ (ｈｅｒｅａｆｔｅｒｒｅｆｅｒｒｅｄｔｏａｓ”ｗｏｒｋｐｉｅｃｅｓ”)ｗｉｔｈｅｐｏｘｙｒｅｓ…     

The pH as a key parameter in the choice between coagulation and electrocoagulation for the treatment of wastewaters

In this work, it is studied the influence of the pH of the waste in the coagulation with aluminum by conventional and electrochemical dosing. To do that, the speciation of aluminum as a function of the pH has been characterized, and this information has been used to interpret the results obtained in the treatments (by both coagulation methods) of a synthetic oil-in-water emulsion and an actual effluent of a door-manufacturing factory. Results show that a simple change in the pH of the wastes can result in a significant change in the efficiency of the coagulation process, and that if the same pH conditions are found at the end of the treatment, the efficiencies of the solution-dosing and of the electrochemical dosing technologies are very similar.     

Metallographic preparation of soft materials: Lead alloys

Metallographic preparation of lead and its alloys is notoriously difficult due to the low hardness of the material and its tendency to pick up and embed abrasive particles readily. Working with component parts for lead acid batteries at Lucas Advanced Vehicle Systems Development, the odd shapes and sizes, such as connector posts and intercell welds, do not lend themselves to microtoming or electropolishing. Vibratory polishing had been used in the past but this method could take up to 6 days to produce an acceptable microsection. Using semiautomatic polishing equipment had proved more successful, but again long periods of time were taken to produce satisfatory results with all the problems of lubricant and abrasive dosing. Tests on newer, commercially available pads and abrasives provided by various manufacturers have been carried out, but it was found that a combination of machining, polishing with diamond, and final polishing with alumina gave the best results. The use of automatic polishing equipment made the preparation easier with both contrarotation and complementary rotation directions. Lubricants and abrasives recommended by the metallographic consumable suppliers for soft materials were not suitable for the easily stained and oxidized lead alloys. This report lays out the steps taken to produce the stated optimized procedure and shows some unusual structures that have been revealed in components taken from batteries undergoing testing, one of which had suffered explosive damage.     

Advanced tertiary treatment of municipal wastewater using raw and modified diatomite

Advanced technology for more efficient and effective wastewater treatment is always timely needed. The feasibility of using raw and modified diatomite for advanced treatment of secondary sewage effluents (SSE) was investigated in this study. Raw diatomite at a dosing rate of 300 mg/l showed a similar potential as activated carbon for removing most organic pollutants and toxic metals from SSE. Its performance was found poor in removal of arsenic and crop nutrient constituents (e.g. ammoniacal nitrogen and phosphate) and remained unsatisfactory even when the dosing rate increased up to 500 mg/l. Where modified diatomite was in lieu of raw diatomite, the removal efficiency for all target constituents was improved by 20-50%. At the dosing rate of 150 mg/l, modified diatomite enabled the post-treated effluents to satisfy the discharge consents, with the levels of all target constituents below the regulatory limits. Modified diatomite has advantages over raw diatomite in improving removal efficiency and reducing the dosing rate required for satisfactory treatment of SSE. It is concluded that modified diatomite is much more effective and efficient than raw diatomite, as an alternative to activated carbon, for economic treatment of SSE.     

嵌入式视频采集与处理系统在混凝剂加注控制中的应用

介绍了一种基于普通DSP的嵌入式视频图像采集与处理系统在混凝剂加注自动控制技术中的应用。该系统以TI公司C2000系列中的TMS320LF2812 DSP(数字信号处理器)芯片为核心,来实时采集和定量分析絮凝池中絮体的图像信息,算出絮体沉淀“等效直径”作为控制混凝剂加注率的目标值,并用进水流量和沉淀水浊度信号自动修正目标设定值。从而自动调整加注量,达到稳定沉淀水浊度的目的。     

Filling characteristics and dosing accuracy of volumetric dosing devices in vertical form—fill—seal machines

A Study has been made of the physical characteristics of the participate products to be filled in vertical form-fill-seal machines and the configuration and dimensions of the filling and dosing devices commonly employed. Filling from cups with different opening mechanisms and filling systems using an auger have been examined, and the dosing accuracy found in all instances to be more dependent on variations in the bulk density, general particle shape and size etc. of the product being filled than on the dimensions etc of the filling device. Results are reported on many of the possible characteristics in an attempt to find the relevant one(s) but it is concluded that our knowledge of product characteristics is insufficient and that more research is required.     

Digitaler Gasdosierer im Grobvakuumbereich

Digital gas dosing device for rough vacuum Vacuum gauges are calibrated by comparing the gauge under calibration with a reference gauge. Both gauges are mounted at a vacuum chamber. Different pressures are generated in sequence, and at each pressure the readings of both gauges are recorded. In the coarse vacuum range, the pressures are usually generated by successive injection of gas into the chamber via a manually operated dosing valve. This procedure requires some time and also fatigues the operator's hand. Therefore, a digital gas dosing device based on electromagnetic valves was developed, which allows a faster und more precise pressure generation than the analogue dosing valve and which is also friendly to the operators hand. Dosing device and its usage are described.     

一种复合机座对设备隔振效果影响试验

通过隔振理论分析,设计复合设备机座的隔振效果试验方案,并讨论试验方案中振级落差和插入损失的关系;通过试验分析,研究复合设备机座自身的隔振效果与其对试验系统的隔振效果的影响,结果表明复合设备机座具有较好的高频隔振效果,但对不同隔振系统的隔振效果影响不同。     

钽及钽合金在废酸回收设备中的应用

介绍了一种由钽及其合金管材加工而成的废酸浓缩回收设备的生产工艺,以及该设备中用于加热和冷却的钽制盘管换热器的生产工艺。并通过与传统废酸回收设备的经济效益对比,得出该钽制废酸回收设备在使用性能和效率上具有传统设备无法比拟的优势,具有显著的经济效益、环境效益和社会效益。推广应用前景广阔。