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Optical Shaft Encoders
Rotary and linear optical encoders are common in position and motion sensing. Here, a disc or plate containing opaque and transparent segments passes between an LED and detector to interrupt a light beam. All rotary encoders consist of a light source, light detector, code wheel, and signal
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Magnetic Alternative to Optical Encoding
with engine cam and crank position sensing. Non-automotive applications use magnetic encoders over other technologies such as optical to overcome problems associated with dust, moisture, shock, vibration, operating temperature, high speeds, wear, etc. Magnetic Alternative to Optical Encoders - Phoenix
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Optical Rotary Encoders: The Basics
On every factory, and on every shop floor, something is rotating and someone wants to monitor it. Enter the optical rotary encoder. Encoders transform mechanical rotary motion into a sequence of electrical pulses, which are in turn monitored for display or control functions through a counter
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Tight Squeeze: Optical Imaging For Cramped Quarters
quality is crucial. Tightly packed optical systems all have one thing in common: They sacrifice lots of image quality to accommodate mechanical constraints. In addition, a good understanding of image quality requirements can avoid a lot of wheel spinning and extra costs. Will it fit?. With minimum
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Aliasing, Orders and Wagon Wheels
effect from Michael’s “Optical Illusions & Visual Phenomena” (http://www.michaelbach.de/ot/mot_wagonWheel/index.html). Another common form of illustrating aliasing is to show a high frequency sine wave sampled at too low a rate. If we sample too slowly we do not see the blue curve but rather we only
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Characterization of Wheel Noise During Train Pass-By at Fiat Ferroviaria
microphone was positioned at 7.50m from the nearest railway track, at a height of 1.20m.An optical barrier was used to trigger the 12kHz data acquisition and to derive the exact speed of the train and the position of each wheel for every time sample. On the train, a mid-frequency volume velocity
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Fast Response Optical Sensors Prove Invaluable in Demanding Gaging Applications
that can easily be accounted for. For confined spaces, the optical fiber probes can be bent or prisms can be attached to redirect the direction of light. Armored cable and non-metallic jackets coupled with ceramic tips extend the usefulness of the equipment into production and high vacuum applications
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Tribometer Lifetime Study of Wheel Bearings
and penetration depth signals corresponds to. first failure of the coating (seen as a rupture along the. scratch path). This point corresponds to an applied load. of approximately 21 mN and an optical microscope im-. age of the resulting deformation is also shown. Note. the significant viscoelastic