压电式加速度传感器，又称振动传感器，是基于压电晶体的压电效应工作的。某些晶体在一定方向上受力变形时，其内部会产生极化现象，同时在它的两个表面上产生符号相反的电荷；当外力去除后，又重新恢复到不带电状态，这种现象称为“压电效应”，具有“压电效应”的晶体称为压电晶体。常用的压电晶体有石英、压电陶瓷等，在现代生产生活中被应用于许许多多的方面，如手提电脑的硬盘抗摔保护，目前用的数码相机和摄像机里，也有加速度传感器，用来检测拍摄时候的手部的振动，并根据这些振动，自动调节相机的聚焦。压电加速度传感器还应用于汽车安全气囊、防抱死系统、牵引控制系统等安全性能方面。
美国Dytran的3054B是一款微型两轴加速度传感器/振动传感器，专为传热管横向加速度测量二设计。
The Dytran 3054B is a unique, miniature biaxial accelerometer designed to be inserted up to 40 feet into 0.319 inches-diameter heat transfer tubes for the purpose of measuring transverse acceleration of the tube. The Dytran model 3054B uses 8 beryllium copper springs attached to the outside of the sensor body, to guide the unit into the tube and allow for slight variations in tube inside diameter and for some buildup of foreign materials inside the tube. Biaxial in design, model 3054B incorporates two quartz sensing elements operating in shear mode. Units are internally isolated from the sensor case and are enclosed by a faraday shield for electrostatic noise immunity. Alternate spring sizes available (up to .935 inches) to accomodate larger tube diameters; contact Dytran for details.
特性
1. 25 mV/g sensitivity
2. 200g range
3. 2 to 500 Hz frequency range (±10%)
4. 40-foot integral cable to flying leads
5. Mounts inside a single tubular housing
6. 7.2 grams
7. Stainless steel
8. Hermetic
9. Case isolated
10. Biaxial
11. IEPE
应用
1. Chillers in nuclear plants
核电站冷却装置
2. Cooling towers
冷却塔
3. Large energy stations
大型能量站
4. Measures vibration in two axes while inserted in a tube
两轴振动测量
5. Vibration measurements in heat transfer tubes in HVAC units
空调传热管的振动测量
WEIGHT 7.2 GRAMS
SIZE (DIA x LENGTH) Ø 0.275 X 1.5 INCHES
MOUNTING [1] UNIT SLIDES INTO Ø.319 MIN. I.D. TUBE ON SPRINGS
ELECTRICAL CONNECTION PROVISION 3-WIRE 40 FT. LONG CABLE W/FLYING LEADS
MATERIAL, HOUSING/CONNECTOR 304L STAINLESS STEEL
PERFORMANCE
SENSITIVITY, ± 10% [1] 25.0 mV/G
RANGE, F.S. (each axis) ± 200 G
FREQUENCY RESPONSE, ± 10% [2] 2 to 500 Hz
ELEMENT NATURAL FREQUENCY >30 kHz
EQUIVALENT ELECTRICAL NOISE .003 G, RMS
LINEARITY [3] 1 %F.S.
SIGNAL POLARITY SENSITIVE AXES ARE ORTHOGONAL AND TRANSVERSE
ENVIRONMENTAL
MAXIMUM VIBRATION +/- 600 G
MAXIMUM SHOCK 1000 G
TEMPERATURE RANGE -60 to +250 oF
ENVIRONMENTAL SEAL HERMETIC WITH BOOTED CABLE
COEFFICIENT OF THERMAL SENSITIVITY .03 %/oF
ENVIRONMENTAL
SUPPLY CURRENT RANGE, (each axis) [4] 2-to 20 mA
COMPLIANCE (SUPPLY) VOLTAGE RANGE (each axis) +18 to +30 VDC
OUTPUT IMPEDANCE, TYP. 100 OHMS
OUTPUT BIAS VOLTAGE +7 TO +9 VDC
DISCHARGE TIME CONSTANT 0.2 TO 1.0 SEC
GROUND ISOLATION [5] 10 MEGOHMS (MIN.)
订货型号
3054B
配件
Supplied Accessories: (1) model 6565A insertion rod adaptor (6-inches long), (1) model 6565A1 insertion rod extender (48-inches long)
相关型号
3211M1
3243A
