Operating principle and characteristics of kh-hzd vibration sensor

The kh-hzd vibration sensor uses admia high-speed and high-performance microprocessor CPU internally. The built-in precision operational amplifier has strong anti-interference ability, which can effectively suppress external harmonic interference and greatly improve the stability of the whole machine. The transmitter can be used in metallurgy, petroleum, chemical industry, building materials, papermaking, electric power, pharmaceutical, industrial water treatment and other industries. The vibration transmitter integrates the magnetoelectric vibration sensor and precision measurement circuit to form a high-precision vibration measurement system. The transmitter can be directly connected to DCS, PLC or other equipment. It is an ideal choice for measuring the vibration of fan, motor, water pump and other plant equipment.

The vibration transmitter adopts two-wire system to provide 4-20mA current signal, which is proportional to the vibration speed of the bearing bush or bearing pedestal of rotating machinery. It automatically collects the vibration signals on the machine and uses the converted analog signals for PLC, DCS and DEH systems.

Main functions:

1. it is mainly used to measure the relative vibration of rotating machinery (i.e. shaft vibration).

2. it is highly integrated, easy to install and debug, and suitable for long-term online monitoring.

3. it has 4 ~ 20mA current analog output and RS485 serial port signal output.

4. it has synchronous signal output. The low-frequency option can measure the low-frequency state quantities such as the swing of the hydraulic turbine and the eccentricity of the steam turbine.

Vibration transmitter is mainly composed of load cell sensor, module circuit, indicator, case and process connector. It can convert the received gas, liquid and other pressure signals into standard current and voltage signals to supply secondary instruments such as indicator alarm, recorder and regulator for measurement, indication and process regulation. The measurement principle of the vibration transmitter is: the process pressure and reference pressure act on both ends of the integrated silicon pressure sensor respectively, and the differential pressure causes the silicon wafer to deform (the displacement is very small, only μ M level), so that the full dynamic Wheatstone bridge made of semiconductor technology on silicon chip can output mv level voltage signal proportional to pressure driven by external current source. Due to the excellent strength of silicon material, the linearity and variation index of output signal are very high.

Vibration transmitter is mainly used to detect absolute vibration of rotating machinery, such as shell vibration, bearing bush vibration, mechanical vibration, etc. Monitor the vibration changes caused by rotor imbalance, misalignment, loose parts, rolling bearing damage, gear damage, etc. It is suitable for steam turbine, hydraulic turbine, fan, compressor, motor, gearbox, machine tool (machining center) and other large rotating machinery, and is suitable for different types of vibration sensors.

Post time: Jun-21-2022