Industrial Pid Digital Thermostat Controller LCD Display
Classification of photoelectric detection methods
The case where the specular reflection is composed of a transmitter and a receiver is a standard configuration. The light beam emitted from the transmitter is reflected by the opposite mirror, that is, returns to the receiver. When the beam is interrupted, a change in the switching signal is generated. The transit time of light is twice the signal duration, and the effective range is from 0.1 to 20 meters. Features: Identify opaque objects; form a high effective distance range with the aid of mirror components; not easily interfered, and can be used reliably in the field or in dusty environments.
The slot type photoelectric switch is usually a standard U-shaped structure, and its transmitter and receiver are located on both sides of the U-shaped slot, and form
An optical axis, when the detected object passes through the U-shaped groove and blocks the optical axis, the photoelectric switch generates the detected switching signal. The grooved photoelectric switch is safe and reliable, suitable for detecting high-speed changes and distinguishing between transparent and translucent objects.
The optical fiber photoelectric switch uses plastic or glass optical fiber sensors to guide the light, so that the detected object is not in the close area. Generally, optical fiber sensors are classified into through-beam type and diffuse reflection type.
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