光电接近开关（国外英文资料）.docVIP

光电接近开关（国外英文资料） Photoelectric sensor detection model is divided into the following categories: correlation type, reflective plate, polarization plate, straight trans, beam width, focus and adjustable area, or area. Straight trans, wide beam type, adjustable type, area and area type is sometimes classified as photoelectric detection pattern of (note: dont be confused with capacitive or inductive proximity switch). For fiber optic sensors, such as the use of intershooting optical fiber, it is a direct test mode; For example, direct anti-optical fiber is used for the approach detection mode. The ultrasonic sensor is divided into two kinds of detection modes. Correlation type The emitter and receiver of the ejection test are mounted to each other, and the light of the transmitter is directed at the receiver. When the object is blocked, the sensor output changes to indicate that the object is detected. The dual approach is the first photoelectric detection model used. Before the advent of modulation, the alignment of the transmitter and receiver was a big problem. Today, it is very easy to target emitters and receivers for photoelectric sensors that use high energy modulated light. The light path is aligned with the - - - - The light path alignment allows the maximum number of emission to reach the receiver, which is located in the middle of the receiving area. When the transmitter is visible light, to make the light road alignment is convenient, in front of the receiver lens put a light color calibration object, through the observation on the calibration on the spot to adjust the emitter location. Move the object away, observe the excess gain indicator on the sensor, and position the transmitter and receiver to achieve the best alignment. Test range - the dual firing The detection distance is a very important parameter for the sensor. For a projective sensor, this parameter is the maximum distance between the transmitter and the receiver. An effective beam is the part of