Back to results
US 2019/0101424 A1Published application
Thermal mass flowmeter for liquids in partially filled pipes
Assignee2M Engineering Limited
InventorHenk Schar
Life of this patent
Estimating the term…
Abstract
In order to measure water flow in sewer systems or other tubes, a sensor ring is inserted into a pipe with capacitive sensors at discrete levels along a circumference of the pipe. Speed is measured by heating up a resistor and measuring the rate at which heat is extracted from the resistor by the flowing liquid.
Claims1
A flow rate sensor for a pipe, comprising:
- a stack of capacitive level sensors arranged at discrete levels along a circumference of the pipe;
- a flow speed sensor comprising a reference temperature sensor and a heated temperature sensor;
- and
- a circuit to regulate heating of the heated temperature sensor to maintain a constant temperature differential between a temperature of the reference sensor and a temperature of the heated temperature sensor.
1 more element
Dependencies are inferred from the claim text.