What is a LVDT simulator?
An LVDT/RVDT simulator is used to convert digital positional commands to corresponding AC signals.
How does LVDT sensor work?
An LVDT measures displacement by associating a specific signal value for any given position of the core. This association of a signal value to a position occurs through electromagnetic coupling of an AC excitation signal on the primary winding to the core and back to the secondary windings.
What does a demodulator do in an LVDT?
In the context of the LVDT signal conditioning, a demodulator is the circuit that converts the AC output of the LVDT to a DC signal whose amplitude and polarity reveals the core position. Rectification-based demodulators and synchronous demodulators are the two main options that can be used with an LVDT device.
What is the output of LVDT?
The LVDT’s electrical output signal is the differential AC voltage between the two secondary windings, which varies with the axial position of the core within the LVDT coil. Usually this AC output voltage is converted by suitable electronic circuitry to high level DC voltage or current that is more convenient to use.
How do you test LVDT?
Connect the positive lead of the DC voltmeter to the sensor’s signal output wire. Connect the negative lead of the DC voltmeter to the jumper wire that is attached to the negative terminal of the power supply. Set the voltmeter to measure DC voltage. Set the DC power supply to 10 volts DC.
What are the three main parts of LVDT?
The main components of an LVDT are a transformer and a core. The transformer consists of three coils — a primary and two secondaries (S1 and S2) — wound on a hollow form, which is typically made of glass-reinforced polymer.
What is the range of LVDT?
200 μm to 50 cm
LVDTs are one of the most popular position sensors. They are available in measurement ranges from 200 μm to 50 cm, the resolution is from 1 μm, and linearity up to 0.05%.
What is the application of LVDT?
Applications of LVDT LVDT is used to measure the physical quantities such as Force, Tension, Pressure, Weight, etc. These quantities are first converted into displacement by the use of primary transducers and then it is used to convert the displacement to the corresponding Electrical voltage signal.
Which type of transducer is used in LVDT?
inductive transducer
The term LVDT stands for the Linear Variable Differential Transformer. It is the most widely used inductive transducer that converts the linear motion into the electrical signal. The output across secondary of this transformer is the differential thus it is called so.
Where are LVDT used?
LVDTs have been widely used in applications such as power turbines, hydraulics, automation, aircraft, satellites, nuclear reactors, and many others. These transducers have low hysteresis and excellent repeatability.