|
|||
|
|
|||
|
From imcdataworks.com
Incremental sensors are used in a wide range of industrial settings wherever displacement, angle, linear or rotational speed, or other time-based physical quantities are to be measured. A previous white paper from imc introduced the functionality and basic analysis possibilities offered by incremental sensors utilizing a single signal, or track. However, is often of interest to know not only the speed at which something moves, but also its direction of movement. This can be achieved by including a second track with a specific phase alignment to the first track.
Resolution is critical in control, and other precision angular applications, such as machine tooling and differential rotational speed measurements. Enhancements of the signal resolution can also be achieved by using a second incremental signal track. The most common technique, of multiplying the two tracks, or using the signals in quadrature, can create a fourfold increase in resolution. If even more resolution is required, there are incremental sensors which generate two analog sinusoidal signals with a 90° offset from one other; analog digitizer processing of these so called SinCos sensors can achieve much higher resolutions than traditional encoders.
Products & Services
Incremental rotary encoders are multi-turn sensors that use optical, mechanical, or magnetic index-counting for angular measurement. They contain no absolute reference, but instead count relative to the turn-on position.
Linear encoders sense and digitize linear position change for positional measurement and feedback to control systems.
Absolute rotary encoders use optical, mechanical, or magnetic indexing for angular measurement. They do not lose their position after power-down, but instead provide absolute position upon power-up without requiring a home cycle or any shaft rotation.
Magnetostrictive position sensors are non-contact linear position sensors that use the momentary interaction of two magnetic fields to produce a strain pulse that moves along a waveguide. One field is from a magnet that moves along the outside of the waveguide. The other field is from the waveguide itself.
AC servomotors are responsive, high-acceleration motors typically constructed as permanent magnet synchronous motors.
Product Announcements
Topics of Interest
Gurley Precision Instruments has developed a unique encoder technology that combines the opto-mechanical simplicity of an incremental encoder with the system reliability and interfacing ease of an...
(Read More)
In This Chapter
Introduction to Robotic Manipulators
Classifi cation of Sensors
Encoders and Dead Reckoning
Infrared Sensors
Ground-based RF Systems
Active Beacons...
(Read More)
Measurement of angle, distance, frequency, and speed, as well as general event counting measurements are commonplace in a variety of industrial situations including gearboxes, engine and motor...
(Read More)
Encoders are widely used to help control machine position and speed. Typical encoder output, a series of quadrature signals, consists of two full square waves, offset by 90° in phase. The number of...
(Read More)
Sensors and encoders are used everyday in manufacturing environments and high precision equipment to monitor the proximity or presence of an object, as well as the position, distance, direction, and...
(Read More)
Technical Articles
Advanced Analysis of Incremental Sensors: Quadrature Encoders, Pulse Multiplication, and SinCos Sensors (.pdf)
- Sensors, Transducers and Detectors
|
|