A special torque measuring piece is attached to a special elastic shaft and a variable bridge is formed, which is a basic torque sensor; fixed on the shaft:
(1) the secondary coil of the energy toroidal transformer,
(2) Signal loop transformer primary coil,
(3) On-axis printed circuit board, the circuit board includes a rectified stable power supply, an instrument amplification circuit, a V/F conversion circuit, and a signal output circuit.
Fixed on the outer casing of the sensor:
(1) excitation circuit,
(2) The primary coil (input) of the energy toroidal transformer,
(3) Signal toroidal transformer secondary coil (output),
(4) Signal processing circuit
An inductor converts some form of energy into another form of energy. There are two types: active and passive. Active sensors can convert one form of energy directly into another without the need for an external source of energy or excitation.
A passive sensor cannot directly convert an energy form, but it can control the energy or excitation energy input from another input, and the sensor undertakes the task of converting a specific characteristic of an object or process into a quantity. The "objects" can be solids, liquids or gases, and their state can be static or dynamic (ie, process). Object properties can be detected in a variety of ways after being quantized by conversion. The characteristics of an object can be either physical or chemical. According to its working principle, it converts the object characteristics or state parameters into measurable electrical quantities, and then separates the electrical signals and sends them to the sensor system for evaluation or labeling.