An Introduction To The Magnetic Sensor
Author: Lixiaona
The sensitive element magnetic performance, which is caused by the magnet field, current, temperature and light, is changed to the electrical signal by the magnetic sensor. This method can detect the objects. The sensor does not touch anything when it is doing the measurement, so the signal can not be influenced. This device is pollution and noise resistance, which is able to handle the tasks under the hostile environment. Therefore, this device is widely used from the national defence to the economic depart, from the medical care to the other part of the daily life.
New technologies and materials, like the manufacturing technique of the large scale semiconductor integrated circuit, MEMS, magnetic thin film and multiplayer, are developing, which had built the basis for the portability of the magnetic sensor. Many multifunctional sensors are released on the market constantly, such as the GMI and SI. The development and application of the new sensor has created great social benefits and sped up the realization of office automation and management concentration. It also plays important roles in many different industries, such as the environmental protection, biotechnology and the resource detection.
There will be great demand for the magnetic sensor from the automotive and industrial area. It is predicated that its sales will reach 1.4billion in the year of 2013. Experts point out that the magnetic sensor is an ordinary sensor, but it is applied from the industrial motor to the electronic products. The magnetic sensor has become the strong competitor of the potentiometer and microswitch now. The related integrated circuit is LM324.
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Li O Na is the freelance writer for e-commerce website in the integrated circuit. SeekIc.com offers the buyers around the world to find quality supplier of electrical components globally. We try our best to aggregate leads in the integrated circuit business world, and let these leads benefit the entire business person.
you use the right hand rule. The wire is wrapped around the coil in a certain orientation.
figure out the direction of the current. (up the left wire or up the right wire). The positive of the power supply is where the current in coming from—out the positive into the negative.
Put the coil/wire in front of you.
In front, the front wires, is the current going up or down.
if up, your thumb points up (you have to see your palm). stick out your fingers and that’s the north pole—the left side of the coil is the north pole.
if down, your thumb points down( you have to twist your arm around, if you just do a thumbs down sign you are seeing the back of your hand, which is bad, you have to see the palm of your hand) stick out your fingers and that’s the north pole—the right side of the coil is the north pole
Without using the Magnetic Field Sensor how could you determine that the coils generate a magnetic field when?
Without using the Magnetic Field Sensor how could you determine that the coils generate a magnetic field when connected to the power supply? ( helmzhotl coil experiement)
I assume the coil you’re talking about is carrying a current, right?
Well the direction of the B-field depends on which way the current is flowing around the loop. In either case, a strong magnetic field can be observed going straight through the center of the coil.
What material should I use to protect sensor from external magnetic field?
I’ve built a sensor that measures current through a wire by measuring the magnetic field, but magnetic fields from other wires are making big noise signal. Is there any way I can protect the sensor?
How does the diameter of a coil loop affect the magnetic field?
Where would the maximum and minimum readings of magnetic field occur? How would holding a magnetic sensor vertically or horizontally affect my readings?
Ok, start answering…!!
Mercy, I don’t know where some of these other posters get their info, but the only way to actually shield magnetic fields is to use superconductor material. But the practical way is to use a ferromagnetic material, such as steel or even better, mu metal. It doesn’t actually shield, but what it does do is provide a very low reluctance path for flux, keeping it away from the shielded object.
Mu metal is used to shield CRTs, for example.
How do you create a magnetic sensor? Something that simply outputs voltage every time a magnet passes it.?
I don’t really want it to vary with the intensity of the magnetic field, only to output a set voltage after a certain magnetic field has been reached.
josephson junction
who can give me an idea of an experiment of permanent magnet and a magnetic filed sensor rather than measuring?
measuring the strength of the magnetic field
There are components called reed switches that could help you, they are always open until a magnet passes over it, they then become closed. You can vary the amount of magnetic field required to operate it by simply mounting the reed switch further away or closer to the magnetic source.