How are pulses measured?
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I have a motor here, with a probe mounted on its rotating shaft; it is said to generate pulses. I would appreciate some guidance on how these pulses are measured
Furthermore, what can affect the measurement of pulses?
"For motors, a probe is installed on the rotating shaft; it is said to be used for detecting pulses. This statement isn’t quite accurate – in most cases, the probe on a motor’s rotating shaft is used as a monitoring instrument for the unit, rather than for simply measuring pulses. Typical conventional unit monitoring instruments are installed fixedly to continuously monitor key parameters, including: the radial vibration of the shaft, axial displacement, the machine’s speed, and bearing temperature. A conventional instrument status monitoring system generally consists of sensors (probes) fixed near the rotating shaft, a preamplifier, and a status monitor. Like permanent-magnet proximity sensors, which are generally used for speed detection in compressor units, it utilizes the principle of electromagnetic induction. A sensor is a component consisting of a coil wound around a magnet; when the gear rotates, the changing magnetic field generated according to the theory of electromagnetic induction creates a changing electric field. An alternating voltage with a frequency related to the number of gears is thus produced at both ends of the coil. By using external instruments for detection and counting, it is possible to measure the speed of the compressor. There is also an eddy current proximity sensor: when a magnetic field passes through the metal surface of a rotating shaft near it, an eddy current is induced in that surface. According to Lenz’s law, an eddy current magnetic field is generated, whose direction is exactly opposite to that of the original coil’s magnetic field. The combination of these two magnetic fields alters the impedance of the original coil.
In favor. There are generally two types of probes: one is the Bentley probe and the other is the type used with 505
Thank you so much; it was truly eye-opening for me. Since I’m a beginner, many descriptions of the on-site items are not clear. I appreciate your guidance.
Pulses used for measuring rotational speed commonly include electromagnetic and photoelectric types!