What is an inductive sensor?
Induction sensor is an electronic device that senses the presence of metal. These devices were introduced at the age of 60 and quickly replaced mechanical switches, especially in a dirty or wet environment. Induction sensors, also known as sensors, use magnetic fields that are affected by close metals. When metal is present, electronic circuits detect field changes and submit a signal that can be used to operate other machines. The effect of the metal on the magnetic field is called the induction effect and the sensor uses an induction loop.
The four main parts consist of an induction sensor. The oscillator changes direct current (DC) into alternating current (AC), although some sensors are powered by AC and do not need this part. The iron core or coil wrapped with a wire creates a magnetic field that will be influenced by the presence of metal. The sensing circuits monitor that the changes in the magnetic field field and capture the field caused by the metal browsing in the surroundings. The output processor takes the UIT sensing circuits and transmits the signal to another device.
Inductive sensors have a wide range of uses. These sensors are usually manufactured as a normally open or normally closed device. Normally open induction sensor does not allow electric current flow unless the sensor is activated. One simple example is the Opener of the Garage Door, where the sensor close to the door of the door when the opening set approaches the engine hanging from the ceiling.
On the other hand, normally closed sensors allow the current flow until the metal is scanned, causing the switch to open and interrupt the flow. They are used when the metal object needs to turn on or operate machines. Applications may include position sensors for remote valves, sorting machines for separation of metal from other materials or washing cars where a passing car or guide cylinder turns on an auto washing device.
Induction sensor is preferred over mechanical switches of severalIka reasons. They do not have any moving parts and do not need preventive maintenance. There is no physical contact between the metal object and the induction sensor, and therefore the products will not be damaged during production or assembly operations. Inductive sensors are robust and unaffected by a wide range of environmental temperatures or conditions, including dirt or chemicals.
Iron responds most to the magnetic field created by an induction sensor, but other metals can also be detected. Stainless steel, brass and even aluminum can be scanned, but the effects of the magnetic field are smaller with these metals and calibration may be needed to ensure signal reliability. Sensors used for non -matt metals may need to be placed very close to a metal object that can reduce their advantages over other types of sensors.