Table of Contents
What is the use of inductive sensor?
An inductive proximity sensor is a non-contact electronic proximity sensor. It is used for positioning and detection of metal objects. The sensing range of an inductive switch is dependent on the type of metal being detected.
How does an inductive sensor work?
Inductive sensors use currents induced by magnetic fields to detect nearby metal objects. If there is a metal object near the changing magnetic field, current will flow in the object. This resulting current flow sets up a new magnetic field that opposes the original magnetic field.
Where are inductive sensors used?
High-precision inductive sensors are used as position feedback devices in a broad range of medical applications such as surgical robotics, medical imaging, and exoskeleton robotics. The common requirement is high reliability and safety in life-critical applications.
What does an inductive sensor detect?
An inductive sensor is an electronic device that can detect ferrous metal targets without physical contact. Inductive sensors will also detect non-ferrous metal targets like aluminum, brass, and copper.
What are the two types of inductive sensor?
Inductive Proximity Sensors are roughly classified into the following three types according to the operating principle: the high-frequency oscillation type using electromagnetic induction, the magnetic type using a magnet, and the capacitance type using the change in capacitance.
What is the difference between capacitive and inductive sensors?
Inductive sensors detect the proximity of metal targets to an inductive coil sensor, whereas capacitive sensors detect the change in capacitance between a sensor and electrode.
What are the types of inductive sensors?
Inductive Proximity Sensors are roughly classified into the following three types according to the operating principle: the high-frequency oscillation type using electromagnetic induction, the magnetic type using a magnet, and the capacitance type using the change in capacitance.
Do inductive sensors sense aluminum?
These sensors have an equal range for aluminum and steel targets. In addition, these new inductive sensors have very long nonflush sensing ranges, allowing metals such as aluminum and stainless steel to be sensed at distances previously not possible.
How are inductive sensors used to measure speed?
The sensor contains a coil that is wrapped around a magnet which cause a change in the magnetic current (flux) and the coil as the teeth of a gear pass the sensor. The moving gear creates a varying flux that induces a proportional voltage in the coil of which the frequency is related to the rotation speed.
What are the types of sensors?
Different Types of Sensors Temperature Sensor. Proximity Sensor. Accelerometer. IR Sensor (Infrared Sensor) Pressure Sensor. Light Sensor. Ultrasonic Sensor. Smoke, Gas and Alcohol Sensor.
What is the meaning of IR sensor?
An infrared sensor (IR sensor) is a radiation-sensitive optoelectronic component with a spectral sensitivity in the infrared wavelength range 780 nm … 50 µm. IR sensors are now widely used in motion detectors, which are used in building services to switch on lamps or in alarm systems to detect unwelcome guests.
What is the limitation of inductive type proximity sensor?
Following are the disadvantages of Inductive sensor: ➨The sensing range of an inductive sensor dependents on the type of metal being detected, its shape, its size and also coil size used in the design. Due to above reason, inductive sensor has distance limitations for sensing. ➨It can detect metallic targets only.
What can an inductive proximity sensor detect aluminum?
These special inductive proximity sensors are known as “nonferrous sensing” or “all-metal sensing.” Nonferrous sensors will detect metals such as aluminum better than they sense iron, while all-metal sensors will pick up on all kinds of metal at the same sensing distance.
What is inductive proximity sensor?
Inductive Proximity Sensors detect magnetic loss due to eddy currents that are generated on a conductive surface by an external magnetic field. An AC magnetic field is generated on the detection coil, and changes in the impedance due to eddy currents generated on a metallic object are detected.
How do you test an inductive sensor?
Unplug the sensor and check that the electrical resistance of the inductive coil is roughly between 500 ohms and 1.500 ohms. If the reading value is drastically different, including zero or infinite, replace the sensor.
What is PNP and NPN sensor?
PNP sensors produce a positive output to your industrial controls input, while NPN sensors produce a negative signal during an “on” state. NPN, or “sinking” output sensors, work in the opposite way, sinking ground voltage to an input when it’s on.
What is the use of capacitive sensor?
Capacitive sensors are most often used to measure the change in position of a conductive target. But capacitive sensors can be effective in measuring presence, density, thickness, and location of non-conductors as well. Non-conductive materials like plastic have a different dielectric constant than air.
What are the types of proximity?
Types of Proximity Sensor Inductive Proximity Sensor. Optical Proximity Sensor. Capacitive Proximity Sensor. Magnetic Proximity Sensor. Ultrasonic proximity Sensor.
How do you know if a circuit is inductive or capacitive?
If both inductors and capacitors are present then simply find the equivalent impedance of the load network. If the imaginary part of the equivalent impedance is positive then the load is inductive, if it is negative then it is capacitive, and if it is zero then it is resistive.
What is ultrasonic distance sensor?
An ultrasonic sensor is an electronic device that measures the distance of a target object by emitting ultrasonic sound waves, and converts the reflected sound into an electrical signal. Ultrasonic waves travel faster than the speed of audible sound (i.e. the sound that humans can hear).
What are the main difference and advantage of inductive and capacitive sensors?
Inductive proximity sensors are used for non-contact detection of metallic objects. Where Capacitive Proximity Sensors are used for non-contact detection of both metallic and nonmetallic objects such as liquid, plastic, paper and more.
