Author: John Mulindi
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Common Terms Used When Describing Power Quality Problems
Power quality has become an important issue to electricity consumers at all levels of consumption. This has especially been intensified by the common use of sensitive equipment and non-linear loads in both industrial and the domestic environs. In this article … Read more
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Magneto-Optic Current Sensors for High Voltage, High Power Transmission Lines
One of the key challenges in measuring the electrical current in high voltage, high power transmission lines, is that of measurement circuit isolation. One way of measuring heavy 60 Hz currents in a conductor is through the use of a … Read more
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How the Wiegand Effect is used in Sensing Instruments
The Concept behind Wiegand Effect Based Sensors The Wiegand effect technology employs the unique magnetic properties of specially processed, small-diameter ferromagnetic wire. By causing the magnetic field of this wire to abruptly reverse, a sharp, uniform voltage is generated. … Read more
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Piezoelectric Accelerometer: Principle of Operation & Applications
An accelerometer is a sensor that is designed to measure acceleration or rate of change of speed due to motion, vibration e.g. from rotating equipment and impact events such as the deployment of an automobile airbag. Accelerometers are usually mechanically … Read more
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The USB-6009 Data Acquisition Card Features
The USB-6009 is a small external data acquisition and control device manufactured by National Instruments that is normally connected to a computer through a USB port. It is used in applications such as simple data logging, academic lab experiments and … Read more
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How X-Y Tables are used in Position Control Applications
X-Y tables are utilized as components in many systems where reprogrammable position control is desired. The X-Y table is two servo-controlled linear actuators (often servomotors and ball screws) with their linear axes perpendicular to each other. Fig: X-Y table, … Read more
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Techniques used in Stopping DC Motors
Stopping of a motor is actually a form of speed control. Methods used to stop DC motors are in a way similar to speed control techniques. To stop a motor, you must accelerate in the direction opposite to that in … Read more
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Microwave Spectroscopy: Features, Types & Applications
Microwave Spectroscopy The section of the electromagnetic spectrum extending approximately from 1 mm (300,000 MHz) to 30 cm (1000 MHz) is referred to as the microwave region. Spectroscopic applications of microwaves consist of almost exclusively of absorption work in gaseous … Read more
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Vision Sensors: Features, Concepts & Applications in Manufacturing
Vision Sensors A vision sensor is basically a TV camera connected to a computer, usually a PC. Special vision software analyzes the video image and makes specific recommendation to the work area. Vision systems require computing power to process thousands … Read more
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Steam Sampling for Conductivity: Instrumentation Structure
Sampling Systems The Purpose of Sampling Systems The objective of a sampling system is to obtain a truly sample of the solid, liquid or gas to be analyzed, at an adequate and steady rate, and transport it without change to … Read more