The atmospheric electric field meter uses a field-grounded sensor to monitor changes in the ground electric field in real time and provide early warnings of thunderstorm activity

The atmospheric electric field meter is a lightning monitoring device based on the principle of induced charge in a conductor. It uses a field-grounded sensor to measure the intensity and polarity changes of the atmospheric electric field. The device's measurement range covers -30kV/m to 30kV/m, with a detection radius of 15 kilometers. It can provide early warnings of thunderstorm activity 5 to 30 minutes in advance and is applied in meteorological stations, petrochemical plants, power facilities, and other scenarios.

The atmospheric electric field meter is a high-precision lightning monitoring and early warning device used to measure the intensity and changes of the atmospheric electric field. This device works based on the principle that a conductor generates induced charge in an electric field. When charge separation occurs in clouds, the ground electric field will change accordingly, and its intensity is related to the accumulation and distribution of charge in the clouds. By measuring changes in the ground atmospheric electric field, changes in the upper-level cloud electric field can be inferred, allowing for forecasting of the risk of lightning strikes.

The atmospheric electric field meter is mainly designed using the field-grounded principle and consists of a stator (induction plate) and a rotor (grounding shield). The rotor, driven by a motor, alternately exposes and shields the electric field. As the moving plate rotates, the stationary plate is alternately exposed to the atmospheric electric field, generating an alternating electrical signal whose magnitude is proportional to the strength of the atmospheric electric field. The device mainly consists of an electric field sensor, a data processing system, and a communication module. The sensor probe is made of stainless steel and features a waterproof and moisture-proof design, allowing it to operate normally in harsh weather conditions such as rain, snow, and hail. The signal processing circuit amplifies the weak induced signal through multiple stages and determines the polarity of the electric field.

In terms of technical parameters, the atmospheric electric field meter has a measurement range covering -30kV/m to 30kV/m, a resolution of 20V/m, and a detection radius of approximately 15 kilometers. The device ensures time synchronization via a GPS module and supports MODBUS protocol communication using a 485 interface. Some products also integrate meteorological sensors and solar power components, transmitting data to a cloud platform via a 4G network for storage, display, and alarm functions.

In the field of meteorological monitoring, the atmospheric electric field meter can be widely used in meteorological stations to continuously monitor lightning activity within a region. By analyzing changes in the atmospheric electric field, meteorological departments can predict the probability and trend of thunderstorms and issue timely lightning warnings. For locations vulnerable to lightning strikes, such as petrochemical plants, communication base stations, power facilities, and high-rise buildings, atmospheric electric field meters serve as crucial monitoring tools for lightning protection. When the detected atmospheric electric field strength exceeds a preset threshold, the device can trigger an alarm, alerting staff to take protective measures. Atmospheric electric field meters have applications in lightning monitoring, airport safety, and power system protection; a typical example is the construction of the lightning monitoring network in Ningdu Industrial Park.