US 11,693,037 B2
Method for measuring environmental electromagnetic field
Che-Peng Chao, Taipei (TW); Li-Lu Ko, Taipei (TW); and Kun-Long Chen, Taipei (TW)
Assigned to NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Taipei (TW)
Filed by NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Taipei (TW)
Filed on Jan. 27, 2022, as Appl. No. 17/586,220.
Claims priority of application No. 110133440 (TW), filed on Sep. 8, 2021.
Prior Publication US 2023/0083519 A1, Mar. 16, 2023
Int. Cl. G01R 29/08 (2006.01); B64C 39/02 (2023.01)
CPC G01R 29/0871 (2013.01) [B64C 39/02 (2013.01); G01R 29/0857 (2013.01); G01R 29/0878 (2013.01); B64U 2201/10 (2023.01)] 10 Claims
OG exemplary drawing
 
1. 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.