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
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% | ||||
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.
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.
