Space-Magnetic Field Visualization System EPS-02EMF System

Product catalog

FEATURES

The system detects position of the magnetic field sensor on the basis of the image on the camera first of all and then, recognizes strength of the signal that is measured by the sensor upon frequency analysis of the signal almost simultaneously.

Finally, visualization of the strength dispersion in composition with the real image of the measured object can be realized on screen of PC. In terms of magnetic field in low frequency, International Commission on Non-Ionizing Radiation Protection (ICNIRP) published “FOR LIMITING EXPOSURE TO TIME-VARYING ELECTRIC AND MAGNETIC FIELDS (1HZ - 100 kHZ). Also, International Electrotechnical Commission (IEC) and Japanese Industrial Standard (JIS) have provided the measurement criteria.

Especially in fields of advancing home appliances which efficient power invertors are built in, power generation equipments like photovoltaic applications, railroad vehicles, charging stands which are expanding rapidly accompanied with spread of electric vehicle (EV) and plug-in hybrid vehicle (PHV) and wireless power supply, this system can surely contribute to drastic reduction of manpower on the countermeasures.

Measurements specified in ICNIRP2010, IEC 62233 and JIS TS C 0044 conductible.
High responsiveness following to the image realized regardless of figures or colors on the sensor part
Composite image of the actual image taken by the camera and the measured dispersion strength visualized
Taking the measurement conditions and environment inside a vehicle into the account, 5m extension cable is attached to the 3 axes magnetic field sensor.
High speed signal processing from the magnetic field sensor realized owing to high speed FFT available the oscilloscope in the frequency analysis.

EPS-02 EMF SYSTEM CONFIGURATION

Magnetic field sensor for the measurement (FT3470-91 by HIOKI Corporation)
Signal processor (R&SRRT0 1004-NSL by Rohde & Schwarz Japan)
Control software (with PC and camera)

MEASUREMENT SCENE EXAMPLES WITH EPS-02EMF SYSTEM

Measurement scene to an engine room

Magnetic field dispersion

in the engine room

Measurement scene to a panel

part inside a vehicle

Magnetic field dispersion on

the panel part

EPS-02EMF BASIC SPECIFICATIONS

Sensor Model NO. FT3470-91 by HIOKI Corporation

Measurement frequency		10H ~ 400kHz
Sensor		Loop coil Cross-sectional area 100cm²
Measurement axis		X, Y , Z
Rated magnetic flux density		2mT
Measurement mode	Magnetic flux density	10Hz~400kH, 10Hz~2kHz, 2kH~400kHz
	Exposure level	General Public / Occupational
Measurement range	Magnetic flux density	2μT/20μT/200μT/2mT *Rated magnetic flux density: 2mT
	Exposure level	20%/200%/2000%
Measurement unit		Magnetic flux density T / Exposure level %
Display renewal rate		Approx. 250ms
Interface		USB 1.1

Signal processor R&S ® RTO1004-NSL by ROHDE & SCHWARZ JAPAN

Oscilloscope	Bandwidth	600MHz
	Sampling rate	10G samples/s
	ENOB	> 7
	Rise time	583 ps
	Input sensitivity	1mV ~ in Base unit
	Channel-to-channel isolation	> 60dB
	RMS noise floor at 50 Ω	<=280μV at f.s. 200mV
	Trigger jitter	<1 ps (RMS)
	Waveform acquisition rate	>1,000,000 waveforms/s
At operation in FFT	Noise floor	-145 dBm/Hz (typical)
At operation in FFT	Updating speed	Max. >=1,200 waveforms/s (typical)

Control software, PC and camera

Image division size	Screen : 640 X 480 dot Division size : 10~120 dot
Measurement mode	Magnetic flux density / Exposure level Measurement data Normal / Hold
Measurement data	Normal / Hold
Image display on camera	Still image / Animation
Strength level setting	Auto / Manual
Arbitrary function	Storage / Reading / Print-out / Export / Comment input
Corresponding OS	Window XP / Vista / 7
Others	USB cable attached