Currently, there are many types of sensors used in life and production. One of them is the magnetic sensor, which is widely used in the industrial field. However, many people still wonder what a magnetic sensor is? How effectively does it work? Today, let’s learn about the structure and operating principle of this sensor with IDEA!
Operating principle of magnetic sensor
When powered, the current will pass through a circuit containing the inductor, so that the magnetic field through it will vary (change). This effect is used to identify metallic objects that are interacting with a magnetic field. Other substances such as liquids or dirt will not interact with the magnetic field. Therefore, the magnetic sensor can work quite well in dusty environments or in wet weather conditions.
The larger the size and cross-section of the magnetic sensor, the stronger the emitted magnetic field. This means that the larger the area it can detect objects, the higher the efficiency it brings.
What are the advantages of magnetic sensors?
Magnetic sensors possess many outstanding advantages, which can be mentioned as follows:
- A device that can operate stably in many different environmental conditions, even in extreme weather.
- Magnetic sensor belongs to the long-life sensor line, you can comfortably use it for a long time.
- Magnetic sensor is relatively simple structure, so the installation and use process is quite easy and fast.
- The cost of purchase and installation when using magnetic sensors is quite cheap.
Types of magnetic sensors
Sensor classification is based on the strength of the magnetic field.
There are 3 types of sensors as follows:
1. Low field sensor
- A type of sensor used to detect small values of magnetic fields such as 1uG (1 Gauss equals 10-4 Tesla). Applications of low field sensors mainly include in scientific research, medical.
2. Earth field sensor
- Sensors use the earth’s magnetic field in a number of applications in vehicles, navigational detection. The magnetic range of this type of sensor ranges from 1uG to 10 G.
3. Magnet field sensor
- These are sensors used to sense large magnetic fields, above 10 Gauss. Most sensors used in industry are magnetic field sensors, which use permanent magnets as a source of magnetic fields. These magnets will detect the magnetism of ferromagnetic objects close to the sensor.
At IDEA Technology Corporation JSC, we apply magnetic sensors to automated guided vehicles (AGVs) by using the magnetic line navigation method. With this sensor, the AGV can navigate in space, recognize a straight line or turn.