With more and more electronic products used in daily life, as well as people attach great importance to our survival environment, people are more and more concerned about electromagnetic leakage pollution generated from electronic products. So the study of electromagnetic leakage detector that can rapidly and accurately detect the electromagnetic leakage in electronic products is significant. In this paper, we design a fast and effective 3-D electromagnetic leakage detector, which using three hollow induction coils which are mutually vertical between each other to obtain the intensity of electromagnetic field. With this instrument, the intensity in three directions can be tested at the same time. Tests revealed that electromagnetic leakage detector can easily measure the 3-D intensity of electromagnetic leakage generated from low frequency electronic products. It provides an important basis for inspection department to detect electromagnetic leakage in electronic products.

In order to measure the magnetic field around electronic products, household appliances and industrial electrical equipment, this paper puts forward a new method which makes use of electromagnetic coupling design based on three-axis electromagnetic leakage. This method can overcome the disadvantage of traditional single-axis measurement which needs to get the total magnetic field after several times’ measurement. This paper designs three-axis electromagnetic leakage detector for circuit measurement, which is proved to be correct after circuit measurement experiment. It can easily detect 30-2K Hz leakage magnetic field of low frequency generated from electrical appliances products.Introduction.