The optical fiber sensor can connect the optical fiber to the light source of the photoelectric sensor, even in the narrow position can be freely installed, and the detection can be implemented.
Principles and Main Types
Optical fiber as shown in the figure consists of a center core and a metal of different refractive index Cladding composition. When the light incident on the fiber core, will be with the metal cladding.Constant total reflection occurs on the boundary surface while entering the fiber. Through optical fiber.Inside, the light from the end face diffuses at an Angle of about 60 degrees,And shine it on the detected object.
Plastic Type
The core is an acrylic resin, consisting of a single or multiple roots with a diameter of 0.1 to 1 mm and wrapped in materials such as polyethylene. Due to light weight, low cost and not easy to bend and other characteristics have become the mainstream of fiber optic sensors.
Glass Type
It consists of glass fibers ranging from 10 to 100 μm and is covered by stainless steel tubes. High temperature resistance (350° C) and other characteristics.
Detection Mode
Optical fiber sensors are roughly divided into two detection methods: transmission type and reflection type.The transmittance type is composed of a transmitter and a receiver. Reflective type from appearance.It looks like one root, but from the perspective of the end face, it is divided into parallel type, same Axial type and separation type, as shown on the right.
Characteristic
Unlimited installation position, high degree of freedom
Using flexible optical fiber, can be easily installed into mechanical gaps or small Spaces.
Small object detection
The tip of the sensor head is very small, making it easy to detect tiny objects.
Excellent environmental resistance
Because the fiber optic cables cannot carry current, they are not susceptible to electrical interference.
As long as the use of heat-resistant fiber elements, even in high temperature sites can still be detected.
LANBAO Optical Fiber Sensor
| Model | Supply Voltag | Output | Response Time | Protection Degree | Housing Material | |
| FD1-NPR | 10…30VDC | NPN+PNP NO/NC | <1ms | IP54 | PC+ABS | |
| FD2-NB11R | 12…24VDC | NPN | NO/NC | <200μs（FINE）<300μs（TURBO）<550μs（SUPER） | IP54 | PC+ABS |
| FD2-PB11R | 12…24VDC | PNP | NO/NC | IP54 | PC+ABS | |
| FD3-NB11R | 12…24VDC | NPN | NO/NC | 50μs（HGH SPEED）/250μs（FINE）/1ms（SUPER）/16ms（MEGA) | \ | PC |
| FD3-PB11R | 12…24VDC | PNP | NO/NC | \ | PC | |
Post time: Feb-01-2023