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Comparison of the advantages and disadvantages of three different speed sensors
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- Time of issue:2020-06-11 13:58
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Comparison of the advantages and disadvantages of three different speed sensors
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Velocity includes linear velocity and angular velocity, corresponding to the wired velocity sensor and angular velocity sensor, we are collectively referred to as velocity sensors. But according to different types of speed sensors have different advantages and disadvantages, briefly introduce the advantages and disadvantages of the three speed sensors.
The first is the Hall sensor: at the main rear wheel drive gear of the core drilling machine for concrete drilling, a small piece of rare earth magnetic steel is inserted into the hole by drilling, and then the Hall element is installed nearby to detect the change of the magnetic field , You can get the electric pulse signal to get the rotation speed of the rear wheel. The advantage is that the information obtained is accurate, the volume is small, and the rear wheel load is not increased. The disadvantage is that the gear is close to the main drive motor, which is easily interfered by the magnetic field; punching the gear makes it easy to damage the gear. The second is the photoelectric sensor: a black and white spaced color ribbon is attached to the surface of the main drive gear, and a reflective photoelectric sensor is installed near the gear. When the black and white color ribbon passes alternately, a series of electrical pulses are generated, thereby obtaining the rotation angle. It is also possible to punch holes in gears and use direct-type photoelectric sensors to generate electrical pulse signals through intermittently received infrared light to obtain the rotation angle. The advantage is that the volume is small, the rear wheel load is not increased, and the reflective solution does not require reprocessing of the original device. The disadvantage is that the accuracy is limited by the volume of the photocell. There is even a photoelectric encoder: additionally purchase a photoelectric encoder installed on the main drive gear, and obtain the rotation angle of the rear wheel through the rotation information transmitted from the gear. As a manufacturer of glass wool roll felt, it will explain its advantages and disadvantages. The advantages are accurate information, high accuracy and easy construction. The disadvantage is to increase the load of the rear wheel; the photoelectric encoder has a larger volume, resulting in an increase in the weight of the vehicle.
There are many types of speed sensors, which need to be selected differently. Different working conditions should be considered. If customers have any unclear choices about speed sensors, they can directly consult the manufacturer and let the sales personnel of the manufacturer choose the suitable sensor for you.
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