Abstract
Purpose:
To Establish an electromagnetic prevention method using the new Bi-Digital CiRing Test (BDORT) hauling machine(MK-III) and to devise a portable system for easy transportation.
Subjects:
MK-III, Personal Computer (P.C.) and portable system connected to an electromagnetic wave emission prevention device.
Method:
The examiner technique was substituted with the MK-III and the examiner finger power O-Ring Test was standardized to improve diagnostic accuracy. The main unit can be powered by both AC and DC sources. A portable system was designed with priority given to convenience and safety.
Results:
The BDORT method was applied using the new hauling machine and electromagnetic fields in the test environment and from the MK-III were measured to clarity the shielding effects of the electromagnetic (E.M) Shield (Zone).
Personal computer system (DB451-DC8) 100VAC - 19V M, distance 30cm(ELF V/m)
N=10
a) Test environment
b) PC
c) with Zone
X
3.12
78.56
2.68
+/-
+/-
+/-
+/-
2sd
0.66
0.30
1.92
Up/Down%
(a-b) 96.03% ↑↑↑
(b-c) 96.59% ↓↓↓
Drive system (DCservomotorDME44B8HPB) AC100V-24V M, distance 30cm(ELF V/m)
N=10
a) Test environment
b) Rectifiermotor
c)with Zone
X
2.94
14.55
2.92
+/-
+/-
+/-
+/-
2sd
1.02
0.42
0.76
Up/Down%
(a-b) 76.79% ↑↑
(b-c) 79.93% ↓↓
PC with DC battery (Internal charge type) DC 24V M, distance 30cm(ELF V/m)
N=10
a) Test environment
b)PC with out Zone
X
3.18
2.75
+/-
+/-
+/-
2sd
0.90
0.54
Up/Down%
(a-b) 13.52%
Drive with DC battery(DCservomotorDME44B8HPB) DC24VM,distance 30cm(ELF V/m)
N=10
a) Test environment
b)DC servomotor with out Zone
X
2.64
2.96
+/-
+/-
+/-
2sd
1.34
1.16
Up/Down%
(a-b) 10.80% ↓
Discussion:
Electromagnetic field (ELF) was measured at a distance of 30cm from each subject. ThelOOV AC personal Computer system with the built- in - MK - in generated an ELF Strength of 3.12+/-0.66 V/m in the test environment and that from the personal computer was 78.56+/-0.30V/m.
When Zone was connected the value decreased by as much as 96.6% to 2.68+/-1.92 V/m. The drive system produced an ELF strength of 2.94+/-1.02 V/m in the test environment and that produced from the motor with a 24VDC rectifier was 14.55+/-0.42V/m. When Zone was connected, these values decreased by 79.93% to 2.92+/-0.76V/m. The ELF Strength of the personal computer with a 24V battery was 3.18 0.90V/m in the test environment but decreased by 13.52% to 2.75+/-0.54V/m when Zone was not connected. The ELF Strength of the drive with a 24V DC battery was 2.64+/-1.34 V/m in the test environment but increased by 10.8%+/- 1.16V/m when Zone was not connected to the motor.
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