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What is the detection method of photoelectric switch?

2020-11-05 15:17:27 bailing

What is the detection method of the photoelectric switch of the vibration switch manufacturer? According to the detection method, photoelectric switches can be divided into diffusion type, relative type, mirror type, slot type photoelectric switch and optical fiber photoelectric switch. Vibration switch manufacturer 1. When the switch emits a light beam, the target produces diffuse reflection, and the transmitter and receiver form a single standard component. When enough combined light returns to the receiver, the switch state changes, and the typical value of the operating distance is generally 3 meters. Features: The effective working distance of the target depends on the reflection ability of the target, and depends on the surface properties and color of the target; the assembly cost is small, when the switch is composed of a single element, it can usually achieve rough positioning; the background suppression function is used to adjust the measurement distance; Sensitive to dust on the target and sensitive to changes in target reflection performance. 2. The other type consists of transmitter and receiver, which are separated from each other in structure. When the beam is interrupted, the switching signal changes. The typical method is that the photoelectric switches located on the same axis can be separated from each other by up to 50 meters. Features: Recognize transparent and reflective objects; large effective distance, because the beam only crosses the sensing distance once; not easy to be interfered, and can be used reliably and properly in the field or dusty environment; high equipment consumption, cable laying is required. 3. Mirror reflection is a standard structure. The light beam emitted from the transmitter is reflected in the mirror opposite to the receiver, that is, when the light beam is interrupted, it returns to the receiver and produces a change in the switch signal. The light passing time is twice the signal duration, and the effective working distance ranges from 0.1m to 20m. Features: Recognize opaque objects; use mirror components to form a higher effective distance; not easy to be disturbed, and can be used reliably and appropriately in the field or in a dusty environment. 4. The slot photoelectric switch is usually a standard U-shaped structure, and its transmitter and receiver are located on both sides of the U-shaped slot to form an optical axis. When the measured object passes through the U-shaped groove and blocks the optical axis, the photoelectric switch generates the detected switching signal. The slot photoelectric switch is safe and reliable to detect high-speed changes and distinguish transparent and semi-transparent objects. 5. Optical fiber photoelectric switches use plastic or glass optical fiber sensors to guide light to detect the area near the detected object. Optical fiber sensors are usually divided into relative type and diffusion type.