The sensor part of the intelligent magnetostrictive liquid level gauge is designed based on the principle of magnetostriction. It consists of a sensitive element waveguide (tube), an active magnet, and electronic components that emit electrical pulse signals and receive return signals. When the electric pulse generated by the pulse generator in the electronic probe is transmitted along the waveguide wire inside the steel pipe, the electric pulse is accompanied by the generation of a ring-shaped magnetic field perpendicular to the waveguide wire and transmitted along the waveguide wire at the speed of light. When the pulsed annular magnetic field meets the inherent magnetic field of the float, the magnetic field vectors of the two superimpose to form a helical magnetic field, generating instantaneous torque and forming a mechanical torque wave on the waveguide wire that is transmitted back to the electronic probe at the speed of sound, causing induced pulses at both ends of the coil. By measuring the time difference between the electric pulse and the induced pulse generated by the return of the torque wave, the height of the measured liquid level can be accurately calculated. Simultaneously placing the temperature sensor inside the measuring rod can continuously measure the temperature of the medium.
Installation method of intelligent magnetostrictive level gauge:
a. Installed far away from vibration, corrosive air, and places that may cause mechanical damage, for the convenience of debugging, instruments should be installed in places with operating platforms or similar platforms. The product should be installed vertically, and the installation slope should not exceed 5 degrees. The ambient temperature is between -40 ℃ and 120 ℃. The installation area requires lightning protection devices.
b. During installation, it is necessary to ensure that the floating ball of the sensor does not come into contact with the container wall (or installation pipe), and the floating ball can move up and down flexibly. The installation thread is firmly connected to the container, and the electrical contact is good. For large-scale or mixed applications, sensors need to be supported or anchored to keep the probe vertical.
c. The ripple of the 24VDC power supply shall not exceed 50mV. The power supply ground wire shall be connected to the standard ground or standard instrument ground, and shall not be connected to the power ground.
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