1. dB4 4채널 주파수분석기

-01dB의 소프트웨어 프로그램 (dBFA 또는 dBENV) 중 선택

-USB2.0 4채널 데이터수집장치로 구성된 휴대용 소음 및 진동 분석기

-USB 포트를 통해 컴퓨터에 연결된 dB4 시스템은 휴대용 및 고정 모드에서 작동을 수행하기 위한 4개의 동기화된 24비트 ICP 입력 제공

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사양

-아날로그 입력 채널 수 : 4, single-ended, simultaneous

-분해능 : 24 bits

-입력 범위 및 게인 : ±10 V (gain of 1), ±1 V (gain of 10)

-게인 에러 : 게인 1의 경우 ±0.02. 게인 10의 경우 ±0.5%

-A/D 타입 : Delta-Sigma

-최대 샘플링 속도 : 52.734 kHz

-최소 샘플링 속도 : 195.3 Hz

-Pass band at –3 dB : 0.49 x Sample Frequency

at –100 dB : 0.634 x Sample Frequency

-Pass band ripple : ±0.005 dB

-신호대잡음비 (typical) : 106 dB

-Total harmonic distortion (–0.5 dB) using 1 kHz sine wave, sampled at 50 kHz : –90 dB typical

-입력 임피던스 : 1 MΩ, 20 pFc

-과전압 보호 (power on/off) : ±40 V

-전류 소스 : 4 mA

-Compliance 전압 : 18 Vdc

-전류 노이즈 @ 1 kHz bandwidth : 5 nA rms

-전류 소스 정밀도 : ±1.0%

-DC 오프셋 : 1.5 mV

-AC 커플링 at –3 dB : 0.5 Hz

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2. dBFA Suite 소프트웨어

특징

-신호 : Decimation; Resampling; HP, LP, BP, Stop-band, Notch Filters; Denoising...

-Overall 레벨 : Leq with frequency weightings; Lp with time (Fast, Slow) and frequency weightings (A, B, C); Acceleration; Velocity; Displacement with Human vibrations weightings, ...

-통계 : Min; Max; Peak; Peak to Peak; Average; RMS; RMS band; Standard deviation:

Skew; Kurtosis. Averaged and vs. time, ...

-FFT : Up to 12800 lines; Overlap from 0 to 75%; Hanning, Hamming, Flat-top,

Rectangular... ; Zoom up to 256; Multispectrum vs. time and rpm with user-defined analysis step; Averaged spectrum with linear, exponential, hold max; Auto and Cross spectrum; H1, H2, 1/H1, 1/H2, Coherence; Auto- and Cross-correlation, ...

-1/N 옥타브 : From 1/1 to 1/48 octave; digital filtering according IEC61260 class 1;

Multispectrum vs. time and rpm with user-defined analysis step;

Averaged spectrum with linear, exponential, hold max, ...

-타코(Tacho) : Real time conversion to rpm profile with trigger, hysteresis, hold-off; Average;

Pulses per revolution; Conversion factor; Min and Max limits, ...

-오더(Order) : Both FFT and Resampling techniques available;

Order resolution down to 0.01; Rpm resolution down to 1 rpm; Fast and accurate

-시간-주파수 : FFT; 1/N octave; Wigner-Ville; Wavelets; Capon; Auto-regressive

-음향 인텐시티 : Simultaneous Li and Lp measurements;

Sound power according to ISO 9614 part 1 & 2; Sound Mapping

-인체 진동 :

All frequency weightings according to ISO8041, ISO 2631 1&2, ISO 5349 and BS6841 for Whole Body and Hand / Arm Vibrations; VDV, eVDV (estimated), MTVV and 3 axis overall vibration values calculations (performed with individual or axis combination with different weightings); VDV time history with variable time integration and cumulative or noncumulative Time

-구조물 분석 : Real-time and off-line transient analysis on impulses, shocks, sparks, gun shots; Impact testing analysis (structural analysis); Real-time vibration signals recording and frequency analysis (hammer testing); Management of the acquisition geometry (excitation and response location on the tested structure);

Trigger capabilities (channel, positive or negative delay, AND/OR conditions, ...);

Customized signal windowing and filtering;

Auto and cross-functions (cross-spectra, FRF’s, coherence);

Export capability (UFF58, Me’Scope,...) for modal analysis processing

-회전 기계 : Tachometric acquisition and real time RPM profile calculation;

Order analysis for rotating machinery, rotation run-ups and coast downs;

Order extraction, cycle defaults, order filtering; Order tracking; Real-time or offline mode providing

overall levels of rotation speed orders (Automatic speed profiles processing based on accurate dating ofrotation speeds);

2D and 3D FFT and Orders spectrograms for sound and vibration signals

-커서 : Single; Double; Harmonics; Sidebands; Max; MultiMax

-디스플레이 : 2D; 3D; Spectrogram and Waterfall; Graphical zoom

-RT 자동화 : Optimize your test time; Customize your tests; Chain and/or repeat different acquisition and real-time

analysis with time conditions (hour, delay,...) and user confirmation between each

-자동 보고서 : Generate your own report automatically in Word after your real-time analysis or from dBFA post-processing; Fully customizable