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本文报道了供生物医学工程用的集成化生理压力传感器和测试仪电路。该集成生理压力传感器由压敏电阻全桥,放大器、灵敏度温度系数(TCS)补偿电路以及温度传感器构成。全部元件集成在而积为2.4mm×2.4mm 的硅片上。由硅芯片封装成的生理压力传感器具有生理相容性,其灵敏度为约1000μV/mmHg,TCS<10~(-4)/℃,带测试仪时频响大于200Hz,量程为-50～+300mmHg,适用于人体压力测量。测试仪是生理压力传感器的配套仪器,压力信号经它处理后,可用一般的生理仪显示和记录。本文还介绍了临床应用中实测到的一些典型的压力波形。
This article reports an integrated physiologic pressure transducer and tester circuit for biomedical engineering. The integrated physiological pressure sensor consists of varistor full bridge, amplifier, sensitivity temperature coefficient (TCS) compensation circuit and temperature sensor. All components are integrated in a 2.4mm × 2.4mm chip. The physiological pressure sensor encapsulated by the silicon chip has the physiological compatibility, the sensitivity is about 1000μV / mmHg, TCS <10 -4 / ° C, the frequency response of the tester is over 200Hz and the measuring range is -50 to +300 mmHg , Suitable for human pressure measurement. Tester is a physiological pressure sensor supporting equipment, the pressure signal processed by it, you can use the general physiological instrument display and record. This article also describes some of the typical measured pressure waveforms found in clinical applications.