Hall sensor detects pulse signal
Hall sensor is a magnetic field made based on the Hall effectsensor. The Hall coefficient measured through Hall effect experiments can determine important parameters such as the conductivity type, carrier concentration, and carrier mobility of semiconductor materials.
The Hall effect is a type of magneto electric effect, which was discovered by A.H. Hall (1855-19three8) in 1879 while studying the conductive mechanism of metals. Later, it was discovered that semiconductors, conductive fluids, and other materials also have this effect, and the Hall effect of semiconductors is much stronger than that of metals. Various Hall elements made using this phenomenon are widely used in industrial automation technology, detection technology, and information processing. The Hall effect is a fundamental method for studying the properties of semiconductor materials.
We walked into Shenzhen Weikewei Technology Co., Ltd. and discussed with their technicians how their Hall sensors differ from traditional magneto electric effect sensors?
Firstly, this new type of Hall sensor传感器When usingTMR (Tunnel MagnetoResistance) element is a new type of magnetoresistance sensor that has been widely used in industry in recent years. It utilizes the tunnel magnetoresistance effect of magnetic multilayer film materials to induce magnetic fields, and has a larger resistance change rate than previously discovered and practically applied AMR and GMR elements.
The following table shows Hall elementsThe comparison of technical parameters of AMR components, GMR components, and TMR components can provide a clearer and more intuitive view of the advantages and disadvantages of various technologies.
technology | power waste(mA) | Size (mm) | sensitivity (mV/V/Oe) | Scope of work(Oe) | resolving power(mOe） | temperature characteristic (℃) |
Hall | 5~twenty | 1×1 | zero point zero five | 1~1000 | five hundred | ＜150 |
AMR | 1~10 | 1×1 | 1 | 0.001~10 | zero point one | ＜150 |
GMR | 1～10 | 2×2 | 3 | zero point one～30 | 2 | ＜150 |
TMR | 0.001～0.01 | 0.5×0.5 | 20 | 0.001～200 | 0.1 | ＜200 |
The company's current sensor has the following characteristics:
1. High accuracy: The accuracy is better than 1% within the working temperature range, which is suitable for measuring any waveform;
2. Good linearity: better than 0.1%;
3. Hall sensors can measure current and voltage of any waveform, such as DC, AC, pulse waveform, etc., and even measure transient peak values. The secondary current faithfully reflects the waveform of the primary current. However, ordinary transformers are incomparable and are generally only suitable for measuring 50Hz sine waves;
In addition to detecting sine current, pulse signals can also be accurately detected with a bandwidth of up to 300KHzSensor delayOnly 1us.
For more technical information, please contact our technical personnel.
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