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1引言生物工程与临床研究者都十分期望有一种体积小、成本低的压力和温度传感器。这种传感器能直接精确地测量血管内部不连续点的压力与温度。然而,即使目前最小的传感器也会影响到被测量体本身。另外,这种传感器应符合现代要求——成本低、适用范围广。压阻压力传感器在五十年代末期就被应用于生物医学仪器之中,它主要用于测量血管的内部压力。Millar仪是把这种传感器微型化并把它置于导管中直接精确地伸入到血管内部进行测量,但由于产品易坏且价格昂贵,阻碍了它的广泛应用。如
1 Introduction Bioengineering and clinical researchers are very much looking forward to a small size, low cost pressure and temperature sensors. This sensor can be directly and accurately measure the pressure within the vascular discontinuities and temperature. However, even the smallest sensors at the moment can affect the object being measured. In addition, this sensor should meet the modern requirements - low cost, wide range of applications. Piezoresistive pressure sensors were used in biomedical instrumentation in the late 1950s and were used primarily to measure the internal pressure of blood vessels. The Millar instrument miniaturizes the sensor and places it in a catheter that plugs directly into the interior of a blood vessel for measurement, but its use is hampered by its fragility and cost. Such as