How can I tell if a wheel speed sensor is a Hall or magnetic sensor?

Hello, unplug the sensor and measure it with the ohm of the multimeter. Hall sensors with infinite resistance are those with infinite resistance, and magnetic inductive sensors with resistance. Thanks, hope

The Hall effect, discovered by Hall in 1879, defines the relationship between the magnetic field and the induced voltage, which is completely different from the traditional induction effect. When an electric current passes through a conductor located in a magnetic field, the magnetic field exerts a force perpendicular to the direction of motion of the electrons in the conductor, resulting in a voltage difference between the two ends of the conductor.

Hall current sensors are sensors that use the Hall effect to convert a large current at a time into a small voltage signal at the second time. Actually designed Hall sensors often amplify weak voltage signals into standard voltage or current signals through circuits such as operational amplifiers.

The Hall current sensor made by the above principle is called [open-loop Hall current sensor].

In order to improve the performance of the sensor, the descendants have made a slight modification, that is, the use of a compensation winding to generate a magnetic field, through closed-loop control, so that it is equal to the size of the magnetic field generated by the measured current, the direction is opposite, to achieve the effect of canceling each other, at this time, the current in the compensation winding is proportional to the size of the measured current, this kind of sensor, is called [closed-loop or magnetic balance Hall current sensor].

Hall sensors are digital sensors with two power lines and a signal line, and if there is a magnetic signal outside, there will be a pulse signal on the signal line, and the speed is proportional to the number of pulse signals. Magnetoelectric sensors do not require an external power supply, and a moving magnet from the outside causes a voltage to be generated by the electromagnetic coil inside the magnetoelectric sensor. The voltage is proportional to the speed, for example, the speed measurement of the vehicle is generally a magnetoelectric sensor.

So Hall has three lines. The magnetoelectric type has two wires.

1. A magnetic sensor made by combining the Huo lead band effect with integrated circuit technology, which can perceive all physical quantities related to magnetic information. Hall effect: By controlling the current at both ends of a metal or semiconductor sheet, and applying a magnetic induction intensity in the vertical direction of the sheet as the corresponding strength is a magnetic field, then an electromotive force field Hall voltage will be generated in the direction perpendicular to the implied current and the magnetic field.

2. Hall element: According to the Hall effect, the components made of semiconductor materials are called Hall elements. It has the advantages of magnetic field sensitivity, simple structure, small size, wide frequency response, large output voltage change and long service life, so it is widely used in the fields of measurement, automation, computer and information technology.

1. A magnetic sensor made by combining Hall effect and integrated circuit technology, which can perceive all physical quantities related to magnetic information. Hall effect: By controlling the current at both ends of a metal or semiconductor sheet, and digging a magnetic induction intensity contained in the vertical direction of the sheet is applied to the magnetic field, then an electromotive force field Hall voltage will be generated in the direction perpendicular to the current and magnetic field.

2. Hall element: According to the Hall effect, the component made of semiconductor materials is called Hall element. It has the advantages of magnetic field sensitivity, simple structure, small size, wide frequency response, large output voltage change and long service life, so it has been widely used in the fields of measurement, automation, computer and information technology.

There are three main differences between Hall sensors and magnetoelectric sensors.

1. The number of external plug wires is not the same

There are three external plug wires for Hall sensors, two of which are power cables and one is signal cables; There are two external plug cables for magnetoelectric sensors, both of which are signal cables.

2. The type of sensor is different

Hall sensors are "active" sensors and require a power supply for external power; Magnetoelectric sensors are "passive" sensors that do not require an external power supply from a power supply.

3. The working principle is different

The magnetoelectric sensor is a sensor that uses the principle of electromagnetic induction to convert the input movement speed into the output of the induced electric potential, and can convert the mechanical energy of the measured object into an easy-to-measure electrical signal without an auxiliary power supply;

The first bend of the Hall sensor bridge is based on the principle of Hall effect, under the action of Lorentz force, the electron flow of the bias current i is offset to one side when passing through the Hall semiconductor, so that the chip produces a potential difference in the CD direction and generates a Hall voltage, which requires a power supply to work normally.

Summary. Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, for you to find the corresponding problem solutions and solutions!

The way to distinguish between a car or sensor and a magnetoelectric sensor is that in the case of a car or sensor, generally Hall sensors have three wires.

And then it's all in the 700 800 ohm resistance, like a crankshaft position sensor.

The three wires of the Hall sensor are generally divided into power supply and tie signals.

How to distinguish between automotive Hall sensors and magnetoelectric sensors?

Dear, this question is up to me, it takes a little time to type, please be patient, thank you!

Good. Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, for you to find the corresponding problem solutions and solutions! The way to distinguish between a car or sensor and a magnetoelectric sensor is that in the case of a car or sensor, generally Hall sensors have three wires.

And then its resistance is in the 700 800 ohm resistance, like a crankshaft position sensing hail generator. Generally, the three wires of the source section of the Hall sensor are divided into power supply and tie-in signals.

There are also three wires of magnetoelectric type.

This TV has three cables, but it has two power supplies and a big iron.