Low Frequency Radiated Immunity Test Using Three-Dimensional Helmholtz-Coil Set
نویسندگان
چکیده
A radiated immunity test method using fields in a three-dimensional Helmholtz-coil set is described. The incident field to equipment under test (EUT) is generated by an orthogonally structured three sets of Helmholtz coil. Using this structure, the resultant field can be generated with arbitrary amplitude and direction. Therefore, the three dimensional immunity characteristics of an EUT can be cleared. The resultant field is calculated numerically and it is established that the field distribution is uniform inside the three dimensional Helmholtz-coil set. This is also confirmed through comparison with measured results. As an example, the immunity test of a cathode ray tube (CRT) display is made and the immunity map of CRT is obtained without reseting placement of EUT. Such map makes us understand the physical meaning and weak points. key words: radiated immunity test, three-dimensional
منابع مشابه
The Effects of Extremely Low Frequency Pulsed Electromagnetic Field on Collagen Synthesis of Rat Skin: a Biochemical and Histoligical Approach
The efficacious effects of pulsed electromagnetic field (PEMF) under the certain field parameters like frequency and the field intensity have been reported for various tissue and molecules. Since collagen is found abundantly in most tissue structures, this research was designed to further investigate the effects of extremely low frequency (ELF) PEMF on the synthesis of the epidermal collagen. ...
متن کاملRadiated Immunity/susceptibility Test Method Using Slowly Rotating Electromagnetic Wave
Authors have proposed a new immunity/susceptibility test method. The paper describes an overview of the proposed method and some estimation results. In the method, electromagnetic fields of low-rate-rotating polarization controlled electrically and continuously in a two-dimensional plane, so that radiated immunity/susceptibility characteristics depicted threedimensionally can be obtained by usi...
متن کاملExperimental and numeric investigation about electromagnetic interference between implantable cardiac pacemaker and magnetic fields at power line frequency.
The present contribute describes the investigation about the implantable pacemaker (PM) immunity against high level magnetic interfering fields at 50 Hz that a pacemaker wearer could find in his working environment. To this purpose, a test bench has been set up based on a Helmholtz coil for producing extremely low frequency (ELF) magnetic fields and a heart simulator rightly fed by electric sig...
متن کاملمطالعه اثر فرکانس 217 هرتز گوشی تلفن همراه با شدت 200 میکروتسلا بر یادگیری و حافظه فضایی در موش آزمایشگاهی
Background: Extremely low frequency (0-300 Hz) fields from power lines, electronic equipment and medical devices, have been reported to produce various biological effects. Global system for mobile (GSM) is most largely used in everybody's life. This system utilizes a low frequency band as well as a high frequency range of electromagnetic field. This study investigated the effects of 217 Hz elec...
متن کاملA PRECISION CALIBRATION SET-UP FOR AC MAGNETIC FLUX DENSITY MEASUREMENT IN THE RANGE OF 1 Hz TO 20 kHz
A precision generating and measurement system of AC magnetic flux density was developed by using a linear low-frequency AC magnetic field converter, a quartz Helmholtz coil, a voltage comparator, a multimeter, a standard resistor, and a computer with a program for automatic measurement. The expanded uncertainty (k=2) of the calibration system is less than 0.2 % over the frequency range of 1 Hz ...
متن کامل