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High-voltage electric field measuring method and device based on non-vertical fiber bragg gratings

A fiber grating and high-voltage electric field technology, applied in the direction of electrostatic field measurement, voltage/current isolation, etc., can solve problems such as complex structure, difficult assembly and portability, and difficult optical path adjustment, so as to improve measurement accuracy, easy to operate and carry, and structural simple effect

Active Publication Date: 2014-09-17
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies existing in the prior art, the present invention proposes a high-voltage electric field accurate measurement method and device based on a non-vertical fiber grating, which solves the complex structure of traditional optical electric field sensors, the difficulty in adjusting the optical path, and the scattered optical elements that are difficult to assemble and carry, etc. Difficult, simplifies the processing technology, reduces the cost and improves the measurement accuracy

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  • High-voltage electric field measuring method and device based on non-vertical fiber bragg gratings
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  • High-voltage electric field measuring method and device based on non-vertical fiber bragg gratings

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Embodiment 1

[0031] Such as figure 1 , figure 2 and Figure 5 As shown, the electric field demodulation system of this embodiment includes: an electric field sensing device, a broadband light source 6 connected in series through an optical fiber 10, two serially connected two-circulators 7, 8, and a photodetector 9, wherein: the electric field sensing device includes a composite voltage The electrical material 1 / 2 and the two fiber gratings 3, 4 parallel to it, and the two circulators 7, 8 are respectively connected to one end of the two fiber gratings 3, 4 in the electric field induction device.

[0032] Such as figure 1 As shown, the two fiber gratings in the bonded electric field sensing device are directly bonded to the upper and lower surfaces of the composite piezoelectric material in parallel, or as shown in figure 2 As shown, it is a cantilever type electric field induction device, in which two fiber gratings 3 and 4 are arranged in parallel on both sides of the composite piez...

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Abstract

The invention provides a high-voltage electric field measuring method and device based on non-vertical fiber bragg gratings. According to the method and the device, two composite piezoelectric materials manufactured in a mutual attaching mode are placed into an electric field, the thickness direction of the piezoelectric materials is identical with the direction of the electric field to be measured, the two fiber bragg gratings are fixed parallel to the piezoelectric materials, the change of strain difference of the two pieces of the fiber bragg grating is detected and calculated to obtain shape change difference, caused by the electric field, of the piezoelectric materials, and therefore the accurate electric field intensity and direction can be obtained. The method and the device solve the problems that a traditional optics electric field sensor is complex in structure, a light path is difficult to adjust, and optical elements are dispersed and can not be assembled and carried easily, the processing process is simplified, the cost is lowered, and the measuring precision is improved.

Description

technical field [0001] The invention relates to a method and device in the technical field of photoelectric measurement, in particular to a method and device for precise measurement of high-voltage electric fields based on a rotating arm type fiber grating and piezoelectric materials. Background technique [0002] The sensing probe of traditional electrical sensors is based on electronic devices. When measuring high-voltage electric fields, there is a risk of breakdown and electric shock. Moreover, the presence of conductors in the sensor also affects the measured electric field, changing the original electric field. distributed. Electric field sensors based on optical effects avoid the above-mentioned problems because they do not contain any conductors in the sensing probe part. Most of the reports on optical electric field sensors are based on the intensity modulation of the Pokels effect or the Kerr effect of electro-optic materials, such as Yang Xiaochun, Yan Yongzhi, "...

Claims

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Application Information

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IPC IPC(8): G01R15/24G01R29/12
Inventor 刘庆文何祖源樊昕昱杜江兵张朕
Owner SHANGHAI JIAO TONG UNIV
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