Research On Dynamics Of Micro-diaphragm Biochemical Sensors

With the development of technology, biochemical sensors that can detect minuter and broader ranges of matters continue to come out. This is not only the reflection of scientific and technological progress; it is also the reflection that people’s living standards increase. Recently, micro-diaphragm biosensors are raised in this context. The micro-diaphragm biosensor is a product of a variety of interdisciplinary. It can provide people with a more effective means of detecting chemical and biological substances. However, due to the complexity of the detection environment, less research covers the influence of absorbed mass, sensor structure and residual stress and other factors on dynamics of micro-diaphragm biosensors. In order to more clearly understand the micro-diaphragm biosensor dynamic performance in a liquid medium, the study of the influence of these factors on the dynamic performance of the micro-diaphragm biosensor has very important significance. In this paper, numerical simulation method is used to do such research.1) According to the sensor size, establish the geometry of the micro-diaphragm biochemical sensors.2) The effect of the liquid medium and the sensor structure on the dynamic performance of the sensor are studied using the ADINA software.. The influence of presence of liquid medium and liquid density on the sensor frequency is studied; at the same time the influence of the sensor geometry on sensor frequency is also studied.3) Analyze the impact of adsorbed mass on the dynamic characteristics of the sensor. The influence of uniformly distributed mass and concentrated mass is studied. Research on the different vibrating modes of micro-diaphragm is carried out; and the influence of adsorption sites on the sensor frequency is also studied.4) By defining the dimensionless coefficients, the effect of residual stress on the micro-diaphragm biosensor dynamic performance is taken into account. Analyze the influence of coefficients at different intervals on the sensor frequency.5) Analyze the dynamics of the double-layer diaphragm biochemical sensor considering the influence of elastic modulus ratio and density ration on the frequencies of the sensor.