A rotational speed sensor is a sensor that converts the rotational speed of a rotating object into an electrical output. A tachometer is an indirect measuring device that can be manufactured by mechanical, electrical, magnetic, optical and hybrid methods. Depending on the signal form, speed sensors can be divided into analog and digital types. The speed sensor is a new type of speed sensor that uses magnetoresistance as the sensing element. The core component uses magnetoresistance as the detection component, and then reduces the noise through a new signal processing circuit.
The speed sensor is a new type of speed sensor that uses magnetoresistance as the sensing element. The core component uses magnetoresistance as the detection element, and then uses a new signal processing circuit to reduce noise and make the function more complete. Compared with the output waveforms of other types of tooth speed sensors, the error in measuring speed is very small and the linear characteristics are in good agreement. The sensing objects are magnetic materials or magnetically permeable materials, such as magnetic steel, steel, electrical steel, etc. When the object being measured has convex (or concave) magnetic or permeable material, the sensor outputs a pulse signal related to the rotation frequency, thereby achieving the purpose of speed measurement or displacement detection.
1. When the engine speed sensor of a Petrol Car fails, the engine of the Petrol Car cannot start or run.
2. It will cause the Petrol Car to be unable to start because the PCM does not receive the engine speed signal of the Petrol Car and does not provide fuel injection and high-pressure ignition. When a Petrol Car engine is started, the top dead center position of the compression stroke of cylinder 1 needs to be correctly identified for ignition. The control unit should compare the signal from the Roewe Car engine speed sensor with the signal from the Hall sensor mounted on the camshaft. If the control unit of a Roewe Car engine does not receive a speed signal, it will stop working properly.
