GB/T 47028-2026Technical specification for lightning electromagnetic field sensors (English PDF)

3.1 sensor

A device or apparatus that can sense the measured quantity and convert it into a usable output signal according to a certain rule.

Note 1.Sensors typically consist of a sensing element and a conversion element.

Note 2.The sensitive element can directly sense or respond to the measured quantity and output an electrical signal.

Note 3.The conversion element is used to process the output signal of the sensitive element.

[Source. GB/T 7665-2005, 3.1.1, with modifications]

3.2

Sensors used to measure the electric field, magnetic field, rate of change of electric field, or rate of change of magnetic field of lightning.

3.3

Lightning electromagnetic field sensors can effectively detect the horizontal distance between the sensor and the point of lightning strike during a lightning return strike.

Note 1.Due to the wide horizontal extension range of cloud lightning and the difficulty in quantifying the distance between it and the sensor, this document uses lightning return stroke as the benchmark.

Note 2.The return shot detection range is usually defined by a closed interval. The upper and lower limits of the interval are related to the sensor's resolution and measurement range, respectively. See the appendix for details.

See Appendix A through Appendix C.

3.4

For electric or magnetic fields of the same intensity but different directions, the direction of the electric or magnetic field corresponding to the maximum value output by the sensor.

Note 1.The maximum sensing direction is determined by the structure of the sensor itself.

Note 2.When the measured object is a lightning electric field or the rate of change of electric field, the maximum induction direction is the direction of the electric field when the sensor outputs the maximum value; when the measured object is a lightning electromagnetic field...

When the field or magnetic field changes, the direction of maximum induction is the direction of the magnetic field when the sensor outputs the maximum value.