An instrumentation system for measuring tractor field performance

An instrumentation system to measure tractor field performance was developed and refined. The system consisted of four sections: transducers, a signal conditioner, a data acquisition system, and a data analysis system;A John Deere 4430 tractor was equipped with the instrumentation system. The transducers measured fuel flow, travel speed, wheel rotational speed, drawbar pull, and rear axle torque. The data acquisition system included an interface board, an AIM 65 microcomputer and a digital cassette recorder (Techtran 817). The microcomputer program was developed with an assembly language so that the system could display and record the data including time, fuel flow rate, travel speed, distance traveled, wheel slip, drawbar pull, and axle torque. The data collected in the field were dumped to and analyzed by a main frame computer. This system functioned relatively well, but still needed some modifications;To improve the system, an RM 65 microcomputer was substituted for the AIM 65. The RM 65 was more compact in size and flexible in design. A computer programmable signal conditioner with 16 dual channels was built to replace the original signal conditioner. To develop the microcomputer program, an inexpensive software development system was constructed;A three-point hitch dynamometer was designed and constructed to measure forces on mounted implements. This dynamometer was based on a three-point hitch quick-attaching coupler, and measured forces in three orthogonal directions. The instrumentation system was used to collect data on tractor field performance

Application of Laser Sensor in Urban Vehicle Type Detection

With the development of urban transportation, more and more traffic accidents happened, most of which were caused by ultra-high vehicles, which not only damaged the road facilities, but also endangered the safety of the masses. In this study, a vehicle height detection system was designed and applied to urban transportation to prevent such accidents. The system utilized the laser light curtain principle of the laser sensor to accurately detect the height of vehicles, equipped with an optical signal anti - interference system and an anti - collision alarm system. The experimental results showed that the system could effectively detect the unqualified vehicles and give alarms, which provided a reference for the application of laser sensor in urban road traffic detection

Transcription of the Workshop on General Aviation Advanced Avionics Systems

Papers are presented dealing with the design of reliable, low cost, advanced avionics systems applicable to general aviation in the 1980's and beyond. Sensors, displays, integrated circuits, microprocessors, and minicomputers are among the topics discussed

OPTIMIZATION OF SURFACE MOUNT TECHNOLOGY SPECIALIZING IN HEAT DISSIPATION IN BGA CSPs

This project describes heat dissipation and mechanical deformation in BGAs. In contemporary industries, demand for smaller packages has increased the concern of thermal management. The lead-free movement has altered the properties of BGAs and comes with its own set of concerns. Packages were simulated and analyzed thermo-electrically using CAD and ANSYS software. The goal was to improve thermal management of electrical loads in CSP BGAs. Lead-based solder simulations demonstrated higher reliability than lead-free alternatives. Results indicate that maximum temperature and stresses were concentrated at the perimeter, especially the corners. This project resulted in suggestions for improvements for existing packaging and opportunities for future projects

Advanced sensors technology survey

This project assesses the state-of-the-art in advanced or 'smart' sensors technology for NASA Life Sciences research applications with an emphasis on those sensors with potential applications on the space station freedom (SSF). The objectives are: (1) to conduct literature reviews on relevant advanced sensor technology; (2) to interview various scientists and engineers in industry, academia, and government who are knowledgeable on this topic; (3) to provide viewpoints and opinions regarding the potential applications of this technology on the SSF; and (4) to provide summary charts of relevant technologies and centers where these technologies are being developed

Design and development of auxiliary components for a new two-stroke, stratified-charge, lean-burn gasoline engine

A unique stepped-piston engine was developed by a group of research engineers at Universiti Teknologi Malaysia (UTM), from 2003 to 2005. The development work undertaken by them engulfs design, prototyping and evaluation over a predetermined period of time which was iterative and challenging in nature. The main objective of the program is to demonstrate local R&D capabilities on small engine work that is able to produce mobile powerhouse of comparable output, having low-fuel consumption and acceptable emission than its crankcase counterpart of similar displacement. A two-stroke engine work was selected as it posses a number of technological challenges, increase in its thermal efficiency, which upon successful undertakings will be useful in assisting the group in future powertrain undertakings in UTM. In its carbureted version, the single-cylinder aircooled engine incorporates a three-port transfer system and a dedicated crankcase breather. These features will enable the prototype to have high induction efficiency and to behave very much a two-stroke engine but equipped with a four-stroke crankcase lubrication system. After a series of analytical work the engine was subjected to a series of laboratory trials. It was also tested on a small watercraft platform with promising indication of its flexibility of use as a prime mover in mobile platform. In an effort to further enhance its technology features, the researchers have also embarked on the development of an add-on auxiliary system. The system comprises of an engine control unit (ECU), a directinjector unit, a dedicated lubricant dispenser unit and an embedded common rail fuel unit. This support system was incorporated onto the engine to demonstrate the finer points of environmental-friendly and fuel economy features. The outcome of this complete package is described in the report, covering the methodology and the final characteristics of the mobile power plant

Preliminary Candidate Advanced Avionics System (PCAAS)

Specifications which define the system functional requirements, the subsystem and interface needs, and other requirements such as maintainability, modularity, and reliability are summarized. A design definition of all required avionics functions and a system risk analysis are presented

Data Acquisition System Using AT89c51 and PCL-207

A typical data acquisition system consists of individual sensors with necessary signalconditioning, data conversion, data processing, multiplexing, data handling and associated transmission, storage and display system. In order to optimize the characteristics of a system in terms of performance, handling capacity and cost, the relevant subsystem can be combined together. Analog data is generally acquired and converted into the digital form for the purpose of processing, transmission and display. Rapid advances in Personal Computer (PC) hardware and software technologies have resulted in easy and efficient adoption of PCs in various precise measurement and complex control applications. A PC based measurement or control application requires conversion of real world analog signal into digital format and transfer of digitized data into the PC. A data acquisition system that performs conversion of analog signal to digital data and the digital data to analog signal is interfaced to a pc to implement the functions of a measurement and control instrumentation applications. In this project we have used the electromagnetic sensor to acquire the data of a magnetic disk angular velocity, which we have got in mili volts range. This has been further converted approximately into the range of 5 volt by using an instrumentation amplifier of suitable gain (~20).We then converted the analog voltage into digital by using ADC 0808 and the processing part is done by using ATMEL89c51.In the second case we have used the data acquisition card PCL-207 to interface the amplified output to PC