Electric field measurement is of great significance in insulation design optimization of power equipment

electromagnetic environment analysis of high voltage system

evaluation of the protective effect of shielding devices

and so on. Evanescent field sensor for electric field measurement is an emerging optical fiber electric field sensor proposed in recent years. The upper limit of its measuring range is up to 24 MV/m

and the package size is as small as 1.2 mm×0.2 mm×0.2 mm. It is capable of measuring multi-point and multi-directional electric field synchronously. It has a broad application prospect in cable fault diagnosis

VFTO monitoring

electromagnetic weapon improvement

etc. At present

the researches on the principle and structure of optical electric field sensors are extensively available in some literature reviews. However

there is a lack of summary of the new evanescent field sensors

as well as the analysis and comparison of the technical parameters of optical fiber electric field sensors. For this reason

the paper first summarizes the measuring principle

typical structure

research progress

application scenarios

temperature compensation methods

and critical technical problems of the evanescent field sensor. On this basis

the measuring index

package size

and performance characteristics of various optical fiber electric field sensors are analyzed and compared. Then

problems existing in the practical process of the sensors above are discussed according to the relevant standards. Finally

it is pointed out that the evanescent field sensor is worthy of further research in the aspects of material modification

processing optimization

micro-scale electric field simulation

and analysis of coupling influencing factors. The research is of specific significance for the design

development

and performance improvement of the evanescent field sensor for electric field measurement.