Digital device for detecting and localising liquid leaks

摘要

Uses a series of digital sensors along the route. Each sensor a Wheatstone type resistive bridge including two known resistors (R2,R3), a series of resistors (R1 - R1n) of different values in place of a variable resistance, linked to switches (S1 - S1n), a resistance wire (Rc) forming the leak detector, an electronic comparator producing a binary output signal, a supply source and an electrical reference. Method for detecting and locating gas or fluid leaks characterized in that: (a) digital sensors of electrical characteristics are placed along the fluid circuit to be monitored to measure an electrical resistance, and; (b) digital data is transmitted to a central unit, by appropriate means such as a digital data bus and/or wireless transmission system, which manage the data received from the sensors. The sensors are a Wheatsone bridges, and leak is detected by leak current unbalancing the bridge, location is achieved by varying the bridge resistance.