Electric spark clearance discharge condition detection apparatus and method based on wavelet transformation

• Main Authors: ZHAO WANSHENG, KANG XIAOMING, GU LIN, JIANG YI
• Format: Patent
• Language: Chinese; English
• Published: 08.07.2009
• Subjects: COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; TRANSPORTING

The present invention relates to an electric spark clearance discharge condition detector which is in the special processing field and is based on wavelet transformation and a method thereof, wherein an analog optical coupler is connected with an electric spark machine tool through an inter-pole voltage signal outgoing cable. An analog-to-digital conversion module is connected at the back end of analog optical coupler. A DSP is connected at the back end of analog-to-digital conversion module. A CPLD is connected with the DSP, the USB interface and an SDRAM. A FLASH memory is connected with the DSP. The USB interface is connected with an upper machine through USB cable. The analog-to-digital conversion module samples the inter-pole voltage signal in electric spark machining and executes wavelet transformation procession to the signal in DSP. The wavelet coefficient comprising discharge condition information is obtained. The discharge condition of prior electric spark machining is obtained through the classifyi