Biological medical pressure sensor

Abstract

The invention relates to a biomedical pressure transducer, which comprises a casing, a silicon piezoresistance sensing assembly positioned in the casing and a pressure transmitting medium positioned on the side of the casing. A strain resistor of the silicon piezoresistance sensing assembly is connected to a soft breadboard which is used as a signal output line through a gold wire internal down-lead; the silicon piezoresistance sensing assembly is a silicon sensing element with a Wheatstone bridge structure; the casing comprises a tubular casing body and a circular pedestal which is cemented and fixed at a bottom port of the casing body; the pressure transmitting medium is filled on the surface of the silicon piezoresistance sensing assembly, and is encapsulated with the upper port of the casing body in a flush manner; and a membrane used for sensing the ambient concentrated pressure can be also arranged on the surface of the pressure transmitting medium. The biomedical pressure transducer is used for the pressure measurement among a spine, a skeleton and a soft tissue and is embedded in a measuring point; the pressure among the spine, the skeleton and the soft tissue is acted on the surface of the pressure transmitting medium, and the force transmission is carried out through the transmitting medium; the pressure is transmitted to the silicon sensing element; and the silicon sensing element transforms the pressure into a voltage signal which is then output.

Description

technical field [0001] The invention relates to an ultra-thin biomedical pressure sensor, which is mainly used for measuring the pressure between human muscles, soft tissues and bones. Background technique [0002] For sensors used in biomedicine, small size and physiological compatibility are required. Implantable measurement has always been an important means of measurement in bioengineering. Since the mid-1980s, almost all famous universities and relevant large companies in the United States, Japan and Europe have successively strengthened the research strength of miniature and thin sensors and their manufacturing processes, and domestic miniaturized sensor technology has also started from the 1990s. Since the 1990s, it has emerged in some universities and scientific research units. Traditional sensors, due to their poor function and large size, are no longer able to meet the requirements. At present, many micro strain gauges are used to make miniature thin pressure se...

AI Technical Summary

Problems solved by technology

[0003] In order to make up for the above shortcomings, the present invention provides an ultra-thin biomedical pressure sensor, which overcomes the shortcomings of the current sensors that measure the pressure between human spines that are too large and too thick

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