Method for realizing multifunctional speed measurement of rotating mechanism based on logic controller

Abstract

The invention relates to the field of output rotating shaft angular velocity measurement of a to-be-measured object. The invention discloses a method for realizing multifunctional speed measurement of a rotating mechanism based on a logic controller. A coded disc is prepared according to the diameter of an output rotating shaft of a to-be-measured object; a proximity switch is installed on the to-be-measured object, a transmitting head and a receiving head of the proximity switch are aligned with the through hole circle of the coded disc, and the proximity switch is connected with a PLC; and the PLC receives signals of the proximity switch to form pulses, the total pulse number A is obtained in a time period T, the angular velocity [omega] of the output rotating shaft of the object to be measured is equal to 2[pi]*A/(T*N), N is the number of the through holes, and [pi] is the circumference ratio. Various defects existing in a complex industrial field environment when a traditional integrated pulse speed measuring device is used are overcome.

Description

technical field [0001] The invention relates to the field of angular velocity measurement of an output rotating shaft of an object to be measured. Background technique [0002] Coal Humidity Control 1 and 2# systems currently in use in Taiyuan Iron and Steel Coking Plant were put into operation in August 2006 and October 2013 respectively. It is an important hub system for coal moisture regulation, and the moisture content of the coal transported to the coal tower directly determines the quality of the final product coke, and the most critical large-scale equipment device in the coal humidity control system is the dryer unit. It directly determines the stability of the subsequent production status and the quality of the product. Currently, one of the important bases for monitoring whether its working status is normal or not is its operating speed. The problems in actual operation are 1) For special In complex industrial environments such as coal drying unit areas (high temp...

AI Technical Summary

Problems solved by technology

[0002] Coal Humidity Control 1 and 2# systems currently in use in Taiyuan Iron and Steel Coking Plant were put into operation in August 2006 and October 2013 respectively. It is an important hub system for coal moisture regulation, and the moisture content of the coal transported to the coal tower directly determines the quality of the final product coke, and the most critical large-scale equipment device in the coal humidity control system is the dryer unit. It directly determines the stability of the subsequent production status and the quality of the product. Currently, one of the important bases for monitoring whether its working status is normal or not is its operating speed. The problems in actual operation are 1) For special In complex industrial environments such as coal drying unit areas (high temperature, diffuse conductive coal powder, etc.), such integrated pulse speed measuring devices generally have a short service life, poor anti-interference performance, long laying of signal cables, and high failure rates , For some production rhythm requirements are high, the rotary actuators that monitor key explosion-proof areas cannot meet the requirements at all, and sufficient spare parts need to be reasonably stocked to meet the actual production requirements

2) This kind of integrated pulse speed measuring device is often installed in a relatively fixed and single way. The speed measuring principle scheme, output accuracy, and speed display mode are basically fixed and non-adjustable once the equipment is finalized, and it is relatively small for the actual production site. Operating in a hidden area Rotary actuators are not easy to install. In addition, the signal transmission of this kind of equipment and the on-site PLC control system constitute a closed-loop control system. It is necessary to use a special signal conversion adapter to complete the signal interaction, which will require additional signal cables. and power supply, resulting in an increase of invisible fault points, daily point inspection, replacement and regular inspection are time-consuming and laborious, which is not conducive to practical application