1 / 9

Photoelectronic Sensors

Photoelectronic Sensors. Diffuse Sensors (proximity mode)‏ Transmitted beam (through beam)‏ Retro-reflective. Diffuse Sensor. Rely on sensing light reflected off a target object Standard, Sharp Cutoff, Background Suppression, Fixed Focus, and Wide Angle. Transmitter-Receiver (Through)‏.

cuyler
Download Presentation

Photoelectronic Sensors

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Photoelectronic Sensors Diffuse Sensors (proximity mode)‏ Transmitted beam (through beam)‏ Retro-reflective

  2. Diffuse Sensor • Rely on sensing light reflected off a target object • Standard, Sharp Cutoff, Background Suppression, Fixed Focus, and Wide Angle

  3. Transmitter-Receiver (Through)‏ • Comprised of a light source and a sensor to detect its beam. Both parts require a power source, can come from different supplies. When a part passes between the transmitter and receiver, the beam is broken and the sensor sends a signal to the automation controller • IR, laser, LED • Dark and Light Applications http://www.baumerelectric.com/be130.html?L=1&country=US

  4. RetroReflective • The transmitter and receiver are incorporated into a single housing. A reflector is mounted opposite to the sensor and returns transmitted light back to the receiver. • The effective beam describes the area that must be completely interrupted in order to reliably sense a target and it increases as the distance between the sensor and reflector increases. When the target is directly in front of the reflector, it must be at least as large as the reflector. Smaller objects can be detected if they are located closer to the sensor and they are at least as large as the optics. • Dark and Light Applications

  5. Summary • Transmitter-Receiver is not valid because of mounting limitations. • Diffuse requires background suppression – expensive • Retro-reflective is picky and hard to mount, but might prove to be most reliable. Sensitivity is issue. • http://sensor.baumerelectric.com • http://www.ab.com/catalogs/sensors/index_prodtype.html All require an A/D converter Different power supplies Reliability has been questioned (due to errors in mounting)

  6. Websites http://machinedesign.com/article/a-background-check-for-photoelectric-sensors-0519 http://everything2.com/title/Photoelectric%2520sensor http://www.ab.com/sensors/sensorstoday/nov01/techtalk/index.html http://ugpro143.blogspot.com/2008/06/basics-of-ir-transmitter-and-receiver.html http://www.solarbotics.net/library/circuits/sensors_prox.html http://www.ifmefector.com/ifmus/web/pinfo1_40_10_40_20.htm

  7. Comparison http://www.acroname.com/robotics/parts/R146-GP2D120.html

  8. Through Comparison

  9. RetroReflective Comparison

More Related