Application Research On High-speed Rapier Loom Multi-Spindle Synchronous Measuring System

Sometimes there could be some emergencies such as loom mechanical or electrical malfunction which could cause loom parking position in a mess when the rapier is weaving. To make the axes return to the right parking angle position, there needs to measure the axes angle displacement synchronously. So, the design of loom multi-spindle synchronous measurement system has important significance to enhance our country's textile industrial level.This paper introduces the traditional and modern measuring angular displacement method, compares the angular displacement measurement scheme domestic and foreign loom, and also researches sorts of angular sensor in the performance, advantages and the usage situation. This paper adopts four rotating transformers with four angle-to-digital converters to accomplish the measure.This paper completes a synchronous measurement system hardware and software design. The hardware part adopts AT89S52 SCM as the main controller to control the RDC output. Compared a series of rotating transformer special decoder chips' performance and price, we choose AD2S1200 as the RDC chip of this system. The software mainly completed the control of four AD2S1200 serial data outputs and using MODBUS communication protocol to communicate with upper PC.The high-speed rapier loom spindle synchronous measurement system which is composed by rotating transformer and the decoder board realized the collection of four axes angular displacement of high reliability solved the problem of photoelectric encoder when it works in an adverse circumstance. Experiments were done on the above-mentioned spindle angle displacement synchronous measurement system, the results showed that this system can accomplish rapier loom four angle axes synchronous measurement, laying the foundation of rapier loom 12 spindles' synchronous measurement.