‫بسم ا‪ ...‬الرحمن الرحيم‬
‫ابزار دقیق‬
‫دکتر سید مجید اسما عیل زاده‬
‫زمستان‪1389‬‬
Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Linear Displacement)
A linear encoder is a sensor, transducer or readhead paired with a scale that encodes
position. The sensor reads the scale in order to convert the encoded position into an
analog or digital signal, which can then be decoded into position by a digital readout
(DRO) or motion controller. The encoder can be either incremental or absolute.
Motion can be determined by change in position over time. Linear encoder
technologies include optical, magnetic, inductive, capacitive and eddy current.
Optical technologies include shadow, self imaging and interferometric. Linear
encoders are used in metrology instruments and high precision machining tools
ranging from digital calipers to coordinate measuring machines.
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
RVDT transducers with AC output have the basic construction with only
the primary and secondary winding inside.
•
RVDT transducers with DC signal output have embedded electronics
responsible for powering and process the sensor internal signals,
converting the detected displacement into a stable DC voltage signal.
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Motion Detection(Rotational Displacement)
• Flight control actuators
• Valves
• Nose wheel steering systems
• Cockpit controls
• Fuel controls
• Fly-by-wire systems
• Brake-by-wire systems
• Power plant
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Motion Detection(Rotational Displacement)
Schematic of Synchro Transducer The complete circle represents the rotor.
The solid bars represent the cores of the windings next to them. Power to the
rotor is connected by slip rings and brushes, represented by the circles at the
ends of the rotor winding. As shown, the rotor induces equal voltages in the
120° and 240° windings, and no voltage in the 0° winding. [Vex] does
not necessarily need to be connected to the common lead of the stator star
windings.
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
A device with a two-phase stator is known as a resolver. A resolver produces sine
and cosine outputs which indicate shaft position.
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Motion Detection(Rotational Displacement)
A resolver is a type of rotary electrical transformer used for measuring
degrees of rotation. It is considered an analog device, and has a digital
counterpart, the rotary (or pulse) encoder.
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational Displacement)
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Motion Detection(Rotational and Linear Displacement)
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Motion Detection
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Motion Detection
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Motion Detection
A tachometer (also called a revolution-counter, "Tach", rev-counter, or RPM gauge) is an instrument
that measures the rotation speed of a shaft or disk, as in a motor or other machine. The device usually
displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are
increasingly common. The term comes from Greek Ταχος, tachos, "speed", and metron, "to measure".[1]
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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Motion Detection
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