電場儀及電場測量方法
An electric field instrument comprises a detection device, a signal processing device and a data analysis device. The detection device sends electric field signals to the signal processing device; a movable sheet, a drive device thereof, two groups of fixed sheets and a sensor are arranged in the detection device; the signal processing device comprises a differential module; and the two groups ofthe fixed sheets in the detection device are respectively connected with two operational amplifiers to constitute two input circuits of the differential module. An electric field measurement method comprises the following steps: two groups of electric field alternating signals are obtained through time-sharing and shielding of the two groups of the fixed sheets by the movable sheet, the obtainedelectric field alternating signals are subjected to the signal processing by a plurality of signal processing processes for outputting the electric field value, and the signal processing processes comprise the steps of carrying out the differential amplification of the two groups of the electric field alternating signals after the filtering and the frequency selection amplification treatments. The electric field instrument and the measurement method of the invention can inhibit the instability of the circuit caused by the temperature and the external electromagnetic interferences, improve thenoise suppression ability and allow the electric field measurement to be stable and reliable.
Inventor: Xinzi Chen | Guoqin Yuan
Priority Number: CN100522362C
IPC Current: B01J003102 | B01J003116 | B01J003118 | C07C005112 | C07C005308 | C07C005312
Assignee Applicant: The Hong Kong University of Science and Technology
Title: Double active species catalyst and its application | Double active species catalyst and application
Usefulness: Double active species catalyst and its application | Double active species catalyst and application
Novelty: Double active species catalyst and its application
化工/材料
化工/材料應用
CHEN Mingli
WANG Huaibin
中國內地
