941B Multi-function vibration sensor
一、 仪器简介941B型低频拾振器为多功能振动传感器，是由中国地震局工程力学研究所、北京腾晟桥康科技有限公司、河北振创电子科技有限公司联合研发的具有自主知识产权的精品传感器。采用差分式磁钢感应振动原理，利用无源闭环伺服技术获得良好的低频特性及良好的阻抗匹配特性；可输出振动加速度、加速度两种参量。941B型低频拾振器设有加速度、小速度、中速度和大速度四档，用户可根据需求拨动传感器上微型开关选择相应的
1.The introduction of instrument
Type 941B low-frequency vibration picker is a multi-functional vibration sensor, which is a high-quality sensor with independent intellectual property rights jointly developed by Engineering Mechanics Institute of China Seismological Bureau and Hebei Zhenchuang Electronic Technology Co., LTD. The principle of differential magnetic steel induced vibration is adopted and the passive closed-loop servo technology is used to obtain good low frequency characteristics and good impedance matching characteristics. Vibration acceleration and acceleration parameters can be output.
The 941B low-frequency vibrator is equipped with four gears: acceleration, small speed, medium speed and large speed. The user can toggle the micro switch on the sensor to select the corresponding gear according to the demand. This sensor can be used in conjunction with the G01NET series of collection instruments produced by our company.
Figure 1 941B multi-function vibration sensor
Figure2 941B Multi-function Vibration Sensor Measurement Direction Map
2.The main technical parameter
941B multi-function vibration sensor has four gears, and the measured parameters and technical parameters of each gear are shown in the table below:
Table 1 941B Multi-function vibration sensor technical parameters
Gear Technical parameter Parametric | 1 | 2 | 3 | 4 | |
Acceleration | Small speed | Medium speed | Maximum speed | ||
Sensitivity | 0.3 | 23 | 2.4 | 0.8 | |
Acceleration | (m/s2，0-p) | 20 | |||
Speed(m/s，0-p) | 0.125 | 0.3 | 0.6 | ||
Displacement(mm，0-p) | 20 | 200 | 500 | ||
Pass band | 0.25～80 | 1～100 | 0.25～100 | 0.17～100 | |
Output load resistance（kΩ） | 1000 | 1000 | 1000 | 1000 | |
Resolution | Acceleration(m/s2) | 5×10-6 | |||
Speed(m/s) | 4×10-8 | 4×10-7 | 1.6×10-6 | ||
Displacement(m) | 4×10-8 | 4×10-7 | 1.6×10-6 | ||
Size，Weight | 63*63*80mm ，1kg | ||||
Operating environment | Temperature：-35℃～+70℃ Humidity：≤90% | ||||
3.Range Applicaion
It is mainly used for ultra-low frequency or low-frequency vibration measurement, pulsation measurement of ground and structures, industrial vibration measurement of general structures, ultra-low frequency large-scale measurement of weak flexible structures and weak vibration measurement.
4.Product Features
1). High reliability and long service life; 2). High resolution; 3). High sensitivity;
4). High linearity and good repeatability; 5). Wide measuring range (low resolution when large measuring range);
6). Convenient installation; 7). Small size; 8). Large dynamic range; 9).Direct output signal without power supply.