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本发明涉及一种基于LPCT的压电驱动式光纤Bragg光栅电流传感器及其使用方法,属于光电子测量技术领域。本发明包括LPCT、取样电阻、叠堆型压电陶瓷、光纤Bragg光栅、光纤粘接点和外接光纤。LPCT连接取样电阻后通过导线连接至叠堆型压电陶瓷上下两端,叠堆型压电陶瓷由若干片压电陶瓷片物理串联组成,光纤Bragg光栅通过光纤粘接点固定设置在叠堆型压电陶瓷中轴线的左右两端,外接光纤一端与光纤Bragg光栅连接,另一端与解调仪相连。本发明高压侧无需电源、测量范围大、抗电磁干扰、尺寸小、结构简单、准确度高、稳定性好,具有极佳瞬态跟踪能力,响应电流变化能够达到μs级。
The present invention relates to a piezoelectric driven fiber Bragg grating current sensor based on LPCT and a using method thereof, and belongs to the technical field of photoelectron measurement. The present invention includes LPCTs, sampling resistors, stacked piezoelectric ceramics, fiber Bragg gratings, optical fiber bonding points and external optical fibers. LPCT connected to the sampling resistor connected to the upper and lower ends of the stack-type piezoelectric ceramic by wire, stacked piezoelectric ceramics composed of a number of piezoelectric ceramic sheets physically connected in series, the fiber Bragg grating through the optical fiber fixed point set in the stack type Piezoelectric ceramic axis of the left and right ends, one end of the external fiber and fiber Bragg grating connected to the other end connected to the demodulator. The high-voltage side of the invention has no need of power supply, has large measuring range, is resistant to electromagnetic interference, small in size, simple in structure, high in accuracy and good in stability, and possesses excellent transient tracking capability and can meet the μs level in response to current changes.