| 摘要 |
<p>The arrangement is for measuring liquid or gas flow speeds provides accurate flow measurements in the presence of fluid component variations. Electrical current is supplied to metal conducting thin tubes (21,22) each of different dia. and each contg. a temp. sensor, placed in the measurement fluid. A further thin metal tube (23) contg. a temp. sensor and carrying an electrical current is placed so as to be not directly affected by the flow. Yet another thin metal tube (24) placed in the fluid contains a temp. sensor but carries no electrical current. The electrical currents in the tubes and the thermal sensor, e.g. thermoelement, outputs are measured and processed by an arithmetic circuit into flow parameters. The indirectly affected tube (23) placed in a housing (32) with upper and lower apertures (33a,33b).</p> |
