| 摘要 |
A flow-rate measuring method for measuring the flow rate of a fluid inside a tube (10) is provided. This method uses a thermal-marker generator (13) that heats the fluid flowing through the tube (10) from the outside thereof to generate a thermal marker in the fluid inside the tube (10) and a thermal-marker detector (5) disposed downstream of the thermal-marker generator (13), so as to measure the flow rate on the basis of the distance between the thermal-marker generator (13) and the thermal-marker detector (5), a time period between a point at which the thermal marker in the fluid inside the tube (10) is generated by the thermal-marker generator (13) and a point at which the thermal marker is detected by the thermal-marker detector (5), and the cross-sectional area of the tube (10). In this method, the thermal-marker generator (13) heats the fluid by a microwave heating technique, and microwaves are applied to the fluid by using a microstrip line (17). |
