Design of Low Cost Industrial Temperature Transmitter

In today’s industrial scenario, the temperature transmitters are one of the most widely used field devices, with innumerable functionalities and features. According to a market research study, majority of the industries use temperature transmitters to monitor and control their processes. These temperature transmitters are costing very high in the market. Even the maintenance of these transmitters is costly. Keeping in view of the above aspect, this project is aiming to design a low cost temperature transmitter. The project proposes to use inbuilt 10 bit ADC and convert it to 16 bit ADC using oversampling method. Temperature transmitter's role is to isolate the temperature signal, filter any Electro- magnetic noise, amplify and convert to 16-bit resolution of input process value.The retransmission part will consist of voltage to current conversion integrated circuit to produce 4 to 20mA current. It is required to take care of the non-linearity of some of the sensors by using Transmitter that can linearize the electrical signal, process and re-transmit them in form of a desired electrical signal which is generally industrial standard 4-20 mA. A low cost Programmable Universal Temperature Transmitter will be designed for temperature sensors like RTD and Thermocouples. Design and simulation of a closed loop control system for 4 to 20mA current loop will be carried out. It is proposed to use analog components for signal conditioning and Renesas make Microcontroller for further computations. In the last a Modbus Communication protocol will be introduced for communication between Field device and PC

Torque ripple attenuation for an axial piston swash plate type hydrostatic pump: noise considerations

The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.Title from title screen of research.pdf file viewed on (February 28, 2007).Vita.Thesis (Ph.D.) University of Missouri-Columbia 2006.The main goal of this work is to reduce the disturbing noise generated by axial piston swash plate type hydrostatic pumps by attenuating the shaft torque variation. The analysis begins by deriving the equation of the shaft torque as a function of the average torque and the total number of pistons that are used within the rotating group. A swash plate control law is derived according to which if the swash plate is adjusted continuously, would give a constant shaft torque. In a second method, it is shown that with the use of an optimized index angle, the torque ripple amplitude for a tandem pump could be reduced by as much as 75%. The results from a Simulink[copyright] model of a nine piston pump with leakage and fluid compressibility effects support the analytical conclusions. It is also shown that there is a link between the torque ripple and flow ripple; hence the torque ripple attenuation results in the flow ripple attenuation too.Includes bibliographical reference

Factors Influencing Overall Service Quality of Online Banking: A Comparative Study of Indian Public and Private Sector Banks

Customer relationship and retention is the key to success for banks. One of the way to achieve it, is through improvement in overall service quality of online banking. This paper have identified factors influencing overall service quality of online banking by survey of 1014 online banking users and have proposed a model. Next, model was validated through a comparative study of public and private sector banks in India. Paper concludes that all independent factors of proposed model do influence overall service quality of online banking of both types of banks but the individual factor influence differently with different bank types

IMECE2005-79627 Torque Ripple Attenuation of an Axial Piston Pump by Continuous Swash Plate Adjustment

Abstract One of the major drawbacks of a hydraulic system is the disturbing noise generated by the hydraulic pump. Based on the accepted theory about noise generation in an axial piston pump, various studies suggesting modification of the port-plate relief groove geometry and addition of hydraulic attenuators have shown a limited success in reducing the noise. The noise level is still high and may not be acceptable for future applications. A recent industrial study shows that the noise apparently has relation with the torque acting on the input shaft of the axial piston pump. The primary objective of this paper is to describe a new method to reduce the noise level by varying the swash plate of the pump continuously to eliminate the torque ripple. The paper begins by deriving the equation of torque acting on the input shaft as a function of the average torque and the total number of pistons that are used within the rotating group. A control law is derived according to which if the swash plate is dithered, should give a constant shaft torque. By attenuating the torque ripple characteristics of the pump, other vibrational aspects of the pump are also expected to be reduced. The secondary objective of this paper is to present a Simulink® model of a nine piston pump to describe a functional pump. The swash plate control law earlier derived will be applied to this model to see the behavior of the output parameters like the shaft torque, output flow and pressure. The results will be investigated to see if any relationship exist between the pump torque ripple and pressure ripple, and the theory of pump noise attenuation by reduction in torque ripple will be corroborated

An Unusual Case Report of Erupted Odontoma

Odontomas are the most common of the odontogenic tumors of the jaws, which are benign, slow growing, and nonaggressive. They are usually asymptomatic and found in routine dental radiographic examination. Odontomas are usually associated with tooth eruption disturbances. Eruption of odontoma in oral cavity is rare entity. Here we report a case of an unusual erupted compound odontoma

A rare cause of acute compartment syndrome after gluteal cyst rupture

Acute Compartment Syndrome (ACS) is a serious medical condition that often results in high morbidity. ACS more commonly presents after substantial trauma in the extremities where compartment pressures can be measured. Here, we present an unusual case of a healthy man who presented with ACS of the thigh secondary to rupture of the gluteal cyst which was formed after multiple unsupervised testosterone injections. Our goal is to encourage a broad differential diagnosis while keeping limb threatening conditions and emergencies on top in patients complaining of leg pain and also to educate the patient population on safety concerns of unsupervised intramuscular injections