CONVEYOR BELT MEASURING SYSTEM

摘要

A conveyor belt and a sensing system for sensing various conditions on a conveyor belt. The belt includes an array of sensing elements embedded in the belt to measure belt conditions. The sensing elements form parts of passive resonant circuits that each include a capacitor and an inductive coil. The capacitor or the inductive coil can be a sensing element. Measuring circuits external to the belt are inductively or capacitively coupled to the resonant circuits in the belt as they pass closely by. The sensing elements change the resonant frequency of their resonant circuits as a function of the sensed conditions. Frequency detectors in the measuring circuits measure that frequency change and convert it into a functionally related value used to determine a belt condition. Exemplary conditions include temperature, pressure, humidity, spillage, and product weight.

主权项

1. A conveyor belt comprising:
a belt body; a plurality of resonant circuits disposed at sensor positions in the belt body, each of the resonant circuits including:
an inductor; anda capacitor connected to the inductor to form the resonant circuit with a resonant frequency determined by the inductance of the inductor and the capacitance of the capacitor;wherein at least one of the inductance of the inductor and the capacitance of the capacitor is varied by a varying condition affecting the conveyor belt.