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What is the Method of using Hall to Detect Speed?

Mar 03, 2020

As a Micropower Omnipolar Hall Sensor Supplier, share with you. The magnet is fixed on a turntable, and the turntable is connected to the motor shaft to rotate synchronously (this is just the principle, you can set it to rotate or slide according to your needs).

When the magnet passes through the Hall sensor, Hall will record and generate a corresponding pulse. We can calculate the measured speed by calculating the interval between two consecutive pulses.

Micropower Omnipolar Hall Sensor

Micropower Omnipolar Hall Sensor

Hall IC can also be used in electronic blood pressure meters

Blood pressure measurement is generally divided into two types, one is the traditional auscultation method, and the other is the oscillometric method, that is, the oscillation method, which is used in electronic blood pressure measuring instruments. Electronic sphygmomanometer is a medical device that uses modern electronic technology and the principle of indirect measurement of blood pressure to measure blood pressure. With the improvement of people's self-health awareness, the electronic sphygmomanometer has become the main tool for home self-testing blood pressure.

The electronic blood pressure meter is composed of a cuff, a measurement system, and a display panel. In order to avoid the phenomenon of inaccurate measurement results due to human leaks, Hall sensors are often installed in the main body of the measuring instrument for position monitoring. Hall mainly plays the role of position detection in the electronic sphygmomanometer.

During the measurement process, the air sleeve needs to be fixed at a certain position on the arm, the air tube is connected to the measuring instrument, the booster pump inflates through the air tube, and the blood pressure meter starts to work. A small magnet is fixed in the gas pipe plug part, and a Hall sensor is installed at the position of the docking socket of the blood pressure meter, so that it can be well monitored whether the gas pipe is inserted in place, and whether the booster pump can normally deliver gas. When the Hall sensor detects the air leak, it will send a signal to the host of the blood pressure meter. At this time, the electronic sphygmomanometer will send an alarm signal, so that the person who measures it can adjust it in time.

All-pole halls are often used in electronic blood pressure measuring instruments. They are small in size and easy to hide and install. Higher sensitivity can provide accurate and stable magnetic switch points. The power consumption is extremely low to meet the battery power supply. The response speed is also very high. Fast, very suitable for use in electronic blood pressure meters.

Our company also has Micropower Omnipolar Hall Sensor on sale, welcome to consult.


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