Method for measuring environmental electromagnetic field

A method for measuring environmental electromagnetic field, comprising:

• steps of:
• disposing an electromagnetic field measurement system on a movable carrier, wherein the electromagnetic field measurement system comprises a sensing module, an analog signal processing module, and a digital signal processing mechanism, wherein the sensing module is selected from the group consisting of an electric field sensor, a magnetic field sensor and a combination thereof to sense an environmental electromagnetic field of a spatial position to generate a sensing signal;
• having the analog signal processing module remove a high-frequency interference from the sensing signal to retain a first filtered signal, wherein the high-frequency interference has a frequency greater than a first frequency value, and the first frequency value is determined according to an electromagnetic field generated from the operation of the movable carrier itself;
• and
• performing the digital signal processing mechanism, comprising steps of:
• converting the first filtered signal into a digital signal;
• removing a low-frequency interference from the digital signal to form a second filtered signal, wherein the low-frequency interference has a frequency less than a predetermined second frequency value;
• and
• calculating a measured value of the environmental electromagnetic field of the spatial position according to the second filtered signal.