Inductive proximity switch consists of oscillator, switch circuit and amplifier output circuit. An oscillator generates an alternating magnetic field. When the metal target approaches this magnetic field and reaches the induction distance, eddy current will be generated in the metal target, which will lead to the oscillation attenuation or even stop. The oscillation and stop of the oscillator are processed by the later amplifier circuit and converted into switching signals, which trigger the drive control device, thus achieving the purpose of non-contact detection.

Extended data

strong function

1, test distance

Detecting the stopping, starting and passing positions of elevators and lifting equipment; Detecting the position of the vehicle to prevent two objects from colliding; Detect the set position of the working machine and move the limit position of the machine or component; Detect the stop position of the rotating body and the open or closed position of the valve.

2. Size control

Size control device for metal plate stamping and shearing; Automatically select and identify the length of metal parts; Detecting the stacking height during automatic loading and unloading; Detect the length, width, height and volume of articles.

3. Check whether there is an object.

Check whether there is a product packaging box on the production packaging line; Check the product parts.

4. Speed and speed control

Control the speed of the conveyor belt; Control the rotating speed of rotating machinery; Control speed and rotational speed together with various pulse generators.

5, counting and control

Check the quantity of products flowing through the production line; Measurement of high-speed rotating shaft or disk revolution; Part count.

Step 6 detect anomalies

Detecting the presence or absence of bottle caps; Determination of qualified and unqualified products; Detecting the lack of metal products in the packaging box; Distinguish between metal and nonmetal parts; Whether the product is labeled; Alarm in dangerous area of crane; Escalators automatically start and stop.

7, measurement control

Automatic measurement of products or parts; Detect the pointer range of instruments and flowmeters to control the quantity or flow; The detection buoy controls the height and flow of the measuring surface; Detecting iron buoys in stainless steel barrels; Control of upper or lower limit of instrument range; Flow control, horizontal control.

8. Identify the object

According to the code on the carrier.

9. Information transmission

ASI (bus) connects the data of sensors at various positions on the equipment to and from the production line (50- 100m).

Baidu encyclopedia-proximity switch

Baidu encyclopedia-inductive proximity switch