Title :
System design for anti-interference of smoke in metal liquid level detecting
Author :
Dasong Ge ; Jinghua Xie ; Zhang Xiaorui ; Junhui Li
Author_Institution :
State Key Lab. of High Performance Complex Manuf., Central South Univ., Changsha, China
Abstract :
In order to eliminate the smoke noise in metal liquid level laser detecting for cast machine, a new system is integrated with semiconductor laser, optical lens, Charge-Coupled Device (CCD), high speed analog signal processor, Field Programmable Gate Array (FPGA). It is based on the theory of triangulation method and the idea of real time surface compensation. The location of the scattering spot will change with the change of metal liquid level, so the level can be calculated by the relationship between the location of the scattering spot and the metal liquid level. However, smoke will influence the location of spot. This system can improve the received light intensity by adjusting the light integration time, and as a result eliminate the interference of smoke, improve the displacement measuring accuracy in smoke environment.
Keywords :
charge-coupled devices; field programmable gate arrays; high-speed techniques; level measurement; semiconductor lasers; smoke detectors; cast machine; charge-coupled device; field programmable gate array; high speed analog signal processor; light integration time; metal liquid level detecting; optical lens; real time surface compensation; semiconductor laser; smoke antiinterference; triangulation method; Displacement measurement; Integrated optics; Metals; Optical scattering; Optical sensors; Packaging; Welding; cast machine; displacement sensor; metal liquid level detecting; smoke interference;
Conference_Titel :
Electronic Packaging Technology (ICEPT), 2015 16th International Conference on
Conference_Location :
Changsha
DOI :
10.1109/ICEPT.2015.7236619
