The proximity switch controls the switch by the sensitivity of the displacement sensor to the approaching object. For some people who don't know much about electricity, maybe this kind of switch is very strange. If you understand this switch, you will know that this switch has many advantages. In addition, this kind of switch is gradually being widely used in life. Today, let the decoration of the home to explain the features of the proximity switch and some of its advantages.
Proximity switch performance characteristics:
When an object moves toward the proximity switch and approaches a certain distance, the displacement sensor will "perceive" and the switch will act. This distance is usually called the "detection distance". However, the detection distances of different proximity switches are also different. Different proximity switches have different responsiveness to the detected object. This response characteristic is called the "response frequency."
(1) Since the detection can be performed in a non-contact manner, the object to be detected is not worn or damaged.
(2) Since the contactless output method is adopted, the life is extended (except for the magnetic type), and the semiconductor output is used, and the life of the contact point is not affected.
(3) Unlike the light detection method, it is suitable for use in water and oil environments, and is almost unaffected by stains, oil, water, etc. of the object to be detected.
(4) High-speed response can be achieved compared to contact switches.
(5) Can correspond to a wide range of temperatures.
(6) The physical property change of the detection object is detected without being affected by the color of the detected object, so that it is hardly affected by the surface color or the like.
(7) Unlike the contact type, the influence of the ambient temperature, surrounding objects, and similar sensors, including the inductive type and the electrostatic capacity type, affect each other.
The main function of the proximity switch:
Inspection distance: detecting the stop, start and pass position of the elevator and lifting equipment; detecting the position of the vehicle to prevent the collision of two objects; detecting the set position of the working machine, moving the limit position of the machine or component; detecting the stop position of the rotating body , the opening or closing position of the valve.
Dimensional control: size control device for sheet metal punching; automatic selection and identification of length of metal parts; detection of height of piles during automatic loading and unloading; detection of length, width, height and volume of articles. Check whether the presence of the object detects the presence or absence of the product packaging on the production packaging line; check for the presence or absence of product parts.
Speed ​​and speed control: control the speed of the conveyor; control the speed of the rotating machine; control the speed and number of revolutions together with various pulse generators.
Counting and control: detecting the number of products flowing on the production line; measuring the number of revolutions of a high-speed rotating shaft or disk; counting parts.
Abnormal detection: detection of bottle caps; product qualification and non-conformity judgment; detection of metal products in the package is lacking or not; distinguish between metal and non-metal parts; product with or without signage detection; crane danger zone alarm; safety escalator automatic start and stop .
Metering control: automatic metering of products or parts; detecting the range of pointers of meters and meters, controlling the number or flow; detecting the height of the measuring surface of the buoy, measuring the flow; detecting the iron buoy in the stainless steel barrel; controlling the upper or lower limit of the meter range; Control, level control.
Identifying objects: Identifying right and wrong based on the code on the carrier.
Information transfer: ASI (bus) connects sensors at various locations on the device to and from the production line (50-100 meters).
The characteristics of the proximity switch make its usage gradually increase, and its function makes public relations widely concerned. In addition, if you want to know more about switches, please continue to pay attention to the decoration home network.
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