| 摘要 |
1,226,999. Pressure transducers. TOYOTA CENTRAL RESEARCH & DEVELOPMENT LABORATORIES Inc. May 8, 1968 [May 13, 1967], No.20188/70. Divided out of 1, 226, 998. Heading G1N. A pressure transducer 5 comprises a pair of mono-crystalline, germanium, strain-sensing elements 3 disposed within a tube 1 parallel to the axis thereof, the remainder of the interior of the tube being filled with a rigid resin 4. One of the elements is of p-type germanium and the other of n-type, each carrying at its ends electrodes 2 connected to lead wires, 6. The two elements may be radially spaced of the tube axis, Fig. 1, or homocentric therewith, Fig.2. In use the transducer may be installed inside a hypodermic syringe for measuring blood pressure. Two or four elements may be connected in half or full bridge circuit so as to be independent of changes in ambient temperature. It is stated that the transducer may employ only one element. |
