| 摘要 |
An improved tandem-type hot-wire velocity meter probe for the measurement of flow velocity of liquids and/or gases, comprising two hot-wire members disposed in tandem at upstream and downstream ends of an insulating support member placed in the flow path (e.g., a pipe or a conduit) of the fluid under measurement. The upstream or leading end hot-wire member has its downstream or trailing side buried or otherwise concealed in the insulating support member, while the downstream-end hot-wire member has its upstream side similarly buried or otherwise concealed therein, so that the exposed surfaces of the two hot-wire members indicate a difference between their rates of heat transfer to the fluid in proportion to the flow rate thereof. This difference can be obtained in terms of a difference in electrical resistance between the hot-wire members by means of a meter incorporated in a bridge circuit including the hot-wire members. There are also disclosed herein several examples of the improved flowmeter probe all conforming to the above basic configuration of the two hot-wire members and the support member.
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