A swing angle detection device and method based on light polarization

Abstract

The invention discloses a pendulum angle detection device based on light polarization, which comprises: a light pendulum frame through which a suspension rope passes; a conductor disk connected to the pendulum frame; and distributed resistance slots connected to the conductor disk , the suspension rope swings to drive the pendulum to swing, and the resistance change of the conductor disc on the resistance slot matches the change of the pendulum angle; two polarizers; a uniform magnetic field device, which generates a uniform magnetic field by passing in a current; with a short-wave pass filter The Cmos line array of the light sheet, the light emitted by the light source passes through the polarizer, the uniform magnetic field device, and falls on the Cmos line array to present a light spot, which produces a photoelectric effect; the signal processing device, when the magnetic field strength changes due to the swing of the hanging rope, passes through the signal processing device Receive the electrical signals generated by different light spots falling on the Cmos line array, get the offset between different light spots, and calculate the swing angle. The invention avoids the influence of the interference of the external environment, is accurate, efficient, has strong real-time performance, is simple, has low cost, and is easy to maintain, and is applicable to the detection problem of the swing angle of multiple spreaders.

Description

technical field [0001] The invention relates to the field of bridge crane detection devices, in particular to a swing angle detection device based on light polarization. Background technique [0002] As an important means of cargo transportation, bridge cranes are widely used in ports, factories and other occasions. However, due to the rapid increase in the throughput of the port every year, a single increase in port berths is far from meeting the transportation demand. At present, a new type of lifting equipment for port container yards, such as double spreader bridge cranes, has greatly improved the efficiency of container loading and unloading, but there is still room for improvement. [0003] During the loading and unloading process, there will be many disturbances. In addition, the operating efficiency of the traditional manual operation of the bridge crane at the terminal is directly related to the operating experience of the bridge crane driver, so it is difficult to...

AI Technical Summary

Problems solved by technology

However, using an encoder may result in inaccurate

Main measurement errors caused by encoder aging or mechanism design problems such as vibration and friction, control system performance deterioration or incorrect results, etc.

Laser detectors are often used as non-contact detection devices, but such instruments have higher requirements on the working environment and are expensive

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