IEPE是指一種自帶電量放大器或電壓放大器的加速度傳感器。IEPE是壓電集成電路的縮寫。因?yàn)橛杉铀俣葌鞲衅鳟a(chǎn)生的電量是很小的,因此傳感器產(chǎn)生的電信號(hào)很容易受到噪聲干擾,需要用靈敏的電子器件對(duì)其進(jìn)行放大和信號(hào)調(diào)理。IEPE中集成了靈敏的電子器件使其盡量靠近傳感器以保證更好的抗噪聲性并更容易封裝。
美國(guó)Dytran的3089A是一款微型IEPE加速度傳感器/振動(dòng)傳感器,靈敏度100mV/g,自帶電量放大功能。
The Dytran 3089A is a cost effective lightweight IEPE accelerometer, with an overall height of just 0.25 inches (6.5 millimeters) and a weight of 0.6 grams. Offered with a 10 mV/g sensitivity and 500g shock limit, the model 3089A incorporates a quartz crystal sensing element, operating in shear mode.
Model 3089A features a rugged stainless steel construction, integral wires and adhesive mounting. Units hermetically sealed for reliable operation in high humidity and dirty environments.
WEIGHT 0.6 grams
SIZE, DIA x HEIGHT 0.19 x 0.25 inch
MOUNTING adhesive
OUTPUT WIRES integral
WIRE LENGTH variable
HOUSING MATERIAL 300 Series Stainless Steel
PERFORMANCE
SENSITIVITY, ± 5% [1] 10.0 mV/g
RANGE F.S. FOR ± 5 VOLTS OUTPUT ± 500 g
FREQUENCY RANGE, ± 10% 1 to 10000 Hz
RESONANT FREQUENCY >50 kHz
EQUIVALENT ELECTRICAL NOISE FLOOR .0014 g rms
LINEARITY [2] ± 1% % F.S.
TRANSVERSE SENSITIVITY, MAX. 5 %
STRAIN SENSITIVITY (@250με) .012 g/με
ENVIRONMENTAL
MAXIMUM VIBRATION/SHOCK ±600/±3000 g PEAK
TEMPERATURE RANGE -60 to +250 °F
SEAL, HERMETIC welded/gtm header
COEFFICIENT OF THERMAL SENSITIVITY .03 %/°F
ELECTRICAL
SUPPLY CURRENT [3] 2 to 20 mA
COMPLIANCE VOLTAGE RANGE +18 to +30 V
OUTPUT IMPEDANCE, TYP. 100 Ω
BIAS VOLTAGE +7 to +9 VDC
DISCHARGE TIME CONSTANT, NOM. 0.3 to 0.6 Sec
POLARITY (SEE OUTLINE DWG) positive
ELECTRICAL ISOLATION case grounded