1. Key Laboratory of Biomedical Engineering of Ministry of Education, Zhejiang University, Hangzhou 310027,China; 2. College of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027,China; 3. Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou 310027， China
Based on the principle of metal foil differential bridge measurement of full bridge and lever principle，a pressure force sensor with small-range and big-trip was designed by theoretical calculation, in order to accurately capture the stress of rat forelimb movement, and then analyze the relationship between rat's brain primary motor cortex neurons signal and its motion perception. Adopting high precision peripheral component interconnect (PCI) signal acquisition and control output module, a rat experiment pressure stem detection system was design. The trail results show that this designed sensor overcomes the limitations in measurement accuracy and range compared with existing sensors; The pressure lever detection system can on-line record the force of the rat forelimb movement force and display parameters, and this designed detection system can detect the force of the rat forelimb movement force with high accuracy and precision. The system can notably improve the performance of brain-computer interface in detecting small animal motion.
ZHU Fan, JIANG Kai, LV Rong-kun, ZHANG Shao-min, ZHENG Xiao-xiang. Small range big-trip pressure lever detection system and its application in brain-computer interface. J4, 2011, 45(9): 1693-1696.
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