Inductive Sensing and Sensor ASIC: What It’s All About
Inductive sensors are intended to calculate the speed or position, particularly in harsh environments. Sensor ASIC can help enhance the sensor’s interface. Nevertheless, the use of this term and technique can be confusing to many engineers.
That is since inductive position and speed sensors are available in many different designs, shapes, and sizes. Accordingly, all inductive sensors would work on transformer principles and use a physical phenomenon based on alternating electrical currents.
The Technology Used in Inductive Sensing
An inductive sensor can detect ferrous metal targets even without physical contact. At the same time, it can detect non-ferrous metal targets such as aluminum, brass, and copper. The only problem with non-ferrous metal targets is that they can decrease the sensing range of the inductive sensor.
- This is the distance from the face of the sensor to the maximum distance it can detect a metal target.
- Note that when the object is non-ferrous metal or one that doesn’t have a significant amount of iron within it, a simple correction factor is required to define the sensing distance.
Parts of Inductive Sensors
- The main external parts of the inductive sensor include the body, face, indicator light, and cable end.
The use of sensor ASIC technology will eventually make it possible to detect changes along with the intelligent interface between the sensor and the user daily.
How an Inductive Sensor Works
Inductive sensors use a coil to generate a high-frequency magnetic field. So, if there is a metal object close to the changing magnetic field, the current will flow in the object. A new magnetic field is set up from the resulting flow of current, which opposes the original magnetic field.
Inductive sensors are non-contact and work for the detection of metal objects. These sensors use a magnetic field generated in front of the sensor. So, if you put a metal target close to the face of the sensor, it will disrupt the electromagnetic field. This will cause the output and indicator light of the sensor to turn on.
Advantages of Using an Inductive Sensor
Inductive sensors are solid-state and they don’t have any moving parts. This means that they are quite reliable because they only need replacing if they have physical damage.
On the other hand, these sensors can still work even when they get dirty. So, even if they gather dirt, grease, oil, or sawdust, it will not affect how they detect the targets.
Applications of Inductive Sensors and Sensor ASIC
Inductive sensors for automation detect parts in place at conveyor stops, at robots, and workstations. At the same time, they can detect if an air cylinder is retracted or extended. These can also detect a pallet stop or if a chain transfer is lowered or raised.
Lots of industries use ASICs to provide various solutions. Sensor ASIC is only one of the many innovations capable of enhancing the sensor interface.
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