Abstract

A single spindle on-line detection system for a spinning frame, the system comprising a main control panel for single spindle detection, spindle speed acquisition panels and a control panel for stopping roving feeding; the spindle speed acquisition panels are connected to the main control panel for single spindle detection by means of a CAN bus, and each spindle speed acquisition panel is mounted on the CAN bus, or two or more spindle speed acquisition panels are connected in series before being mounted on the CAN bus; the spindle speed acquisition panels are each used to acquire the rotational speed of a spindle as well as the status of yarn and use the CAN bus to send to the main control panel for single spindle detection a data message that contains the rotational speed of the spindle and the status of the spindle; the main control panel for single spindle detection is used to identify the spindle speed acquisition panel that sends the data message when two or more spindle speed acquisition panels are connected in series before being mounted on the CAN bus and send to the control panel for stopping roving feeding an instruction to stop roving feeding when the yarn has broken ends so as to stop the feeding of roving. The described single spindle on-line detection system for a spinning frame features good adaptability to work conditions.

IPC Classes  ?

• D01H 13/26 - Arrangements facilitating the inspection or testing of yarns or the like in connection with spinning or twisting
• D01H 13/16 - Warning or safety devices, e.g. automatic fault detectors, stop motions responsive to reduction in material tension, failure of supply, or breakage, of material
• D01H 13/18 - Warning or safety devices, e.g. automatic fault detectors, stop motions responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only
• D01H 13/32 - Counting, measuring, recording or registering devices

Abstract

Disclosed are a spindle rotation speed capturing method for a magnetoelectric single-spindle detection system, and a related apparatus. The capturing method comprises: continuously performing detection on an edge signal of each input channel, and every time the edge signal undergoes hopping, storing a count value of a timer in a register corresponding to the input channel (S101); taking the case of a rising edge or a falling edge continuously occurring in the edge signal N times as a sliding window with a width of N, and reading, from the corresponding register, a first count value of the timer when two instances of hopping of the same polarity, the interval between which is L, in the current sliding window occurs, wherein N ≥ 2 and 1 ≤ L ≤ N - 1 (S102); and obtaining a first count increment according to the first count value, calculating a spindle rotation speed according to the first count increment, and with continuous sliding of the sliding window, calculating a spindle rotation speed captured by each channel in an online scroll mode (S103). By means of the capturing method, a jitter phenomenon in the process of spindle rotation speed capturing can be effectively reduced, the accuracy of spindle rotation speed capturing is guaranteed, and the technical defects of existing delay de-jitter methods can be effectively overcome.

IPC Classes  ?

• G01P 3/48 - Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage