TY - GEN
T1 - New gas sensor head without gas chamber by hollow core PBF
AU - Xuewu, Zhou
AU - Jianping, Hou
AU - Jianlin, Zhao
PY - 2007
Y1 - 2007
N2 - A reflecting optical-fiber gas sensor head structure without gas chamber by PBF was reported. It could be used in real-time detection of gas concentration in micro-machinery. For this sensor head, a PBF fiber was used for both transmitting and sensing, a micro-concave mirror and a gas filter were fixed to the one end of the PBF, and the other end of the PBF was connected to a special open coupler in a vacuum box. Gas could transmit and fill the full hollow core area of the PBF by means of negative pressure. The characteristic of gas transmitting in the PBF was simulated with a simplified model by choosing appropriate type and parameters of the PBF. The mass flow rate, the average period of transmission and the relation between the length of PBF and the average period of transmission in different negative pressure were worked out. The result shows that the average period of transmission was proportional to the square of the length of PBF. This PBF gas sensor has its own superiority: (1)Gas transmitting is driven by negative pressure of vacuum pump in the hollow core of the PBF, then the sensor's response time can be improved to less than 10 seconds. (2)With smaller size of sensor head, the interference of the sensor's entrance can be reduced. (3)Without gas chamber, the sensor like a probe, so it can be used in more areas, especially for MEMS system.
AB - A reflecting optical-fiber gas sensor head structure without gas chamber by PBF was reported. It could be used in real-time detection of gas concentration in micro-machinery. For this sensor head, a PBF fiber was used for both transmitting and sensing, a micro-concave mirror and a gas filter were fixed to the one end of the PBF, and the other end of the PBF was connected to a special open coupler in a vacuum box. Gas could transmit and fill the full hollow core area of the PBF by means of negative pressure. The characteristic of gas transmitting in the PBF was simulated with a simplified model by choosing appropriate type and parameters of the PBF. The mass flow rate, the average period of transmission and the relation between the length of PBF and the average period of transmission in different negative pressure were worked out. The result shows that the average period of transmission was proportional to the square of the length of PBF. This PBF gas sensor has its own superiority: (1)Gas transmitting is driven by negative pressure of vacuum pump in the hollow core of the PBF, then the sensor's response time can be improved to less than 10 seconds. (2)With smaller size of sensor head, the interference of the sensor's entrance can be reduced. (3)Without gas chamber, the sensor like a probe, so it can be used in more areas, especially for MEMS system.
KW - First slip velocity boundary condition
KW - Navier-Stokes equations (N-S)
KW - Optical-fiber gas sensors
KW - Photonic bandgap fiber (PBF)
UR - http://www.scopus.com/inward/record.url?scp=42149105548&partnerID=8YFLogxK
U2 - 10.1117/12.782462
DO - 10.1117/12.782462
M3 - 会议稿件
AN - SCOPUS:42149105548
SN - 9780819468819
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies
T2 - 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems
Y2 - 8 July 2007 through 12 July 2007
ER -