According to the characteristics of the intelligent electromagnetic flowmeter system, the key from the system configuration to enhance the level of electromagnetic flowmeter to explore the source of dry deflection, such as magnetic induction coupling, electrostatic induction is the automation of electromagnetic flowmeter caused by the key source of dry noise.
Today's electromagnetic flowmeter manufacturer Supmea mainly for the interference of this piece for you to make a speech to explain. In the magnetic induction to stay in the amount of transmission, because the two electric level of the lead in the inductive element in the electric field, when the transmission is connected to the power supply, in the lead of the closed circuit caused by the induction of electric potential. This type of electromagnetic interference accumulates in the measurement signal and jeopardizes the operation of the system. Various types of excitation methods cause different interference signal problems. DC excitation method is prone to polarization interference, AC excitation method is prone to orthogonal interference (90 degree interference), in-phase interference (i.e., industrial frequency interference) and so on. Quadrature interference refers to the interference that is 90 degrees away from the stay signal in phase.
Intelligent electromagnetic flow transmitter using AC excitation, to cause an inductive element of the electric field, and by the electric level, lead wires, the measured substance and the converter of the bonded integrated op-amps constitute a closed circuit, is in the dry flexing inductive element of the electric field, closed circuit is not with the transmitter's inductive element of the magnetic field caused by the magnetic field of the complete flat shape, there will often be a small portion of inductive element of the magnetic field across the closed circuit, which in turn In the circuit caused by a dry flexural electric potential, in the electromagnetic flowmeter, from the transmitter and converter two parts to take effective, to remove or inhibit 90 ° dry flexural.
Intelligent electromagnetic flowmeter in-phase interference frequency interference or common-mode interference, refers to the same moment appeared in the transmitter on the two electrical levels, and the amplitude and phase are the same electromagnetic interference. When the amount of retention for the temporary, that is, the measured liquid is out of balance, the measured signal of the same conviction is also the same phase electromagnetic interference. Electromagnetic flowmeter for the same phase interference, suppression of more ways. In the transmitter level, the electric level and the excitation sense in the plane graphic appearance, specification and its technical parameters to do the balance of the corresponding point, and each of them is strictly screened, in order to reduce the electric level and the excitation sense of the middle of the distribution capacitance harm.
Hangzhou Economic Development Area，Hangzhou 310018，China
