加速度对气体摆式倾角传感器影响机理的探讨  

Discussion on mechanism of effect of acceleration on gas pendulum tilt sensor

作　　者：朴林华[1] 张伟[1] 张金铎[2] 张福学[1] 

机构地区：[1]北京信息工程学院传感技术研究中心,北京100101 [2]北京大学电子学系,北京100871

出　　处：《传感器技术》2004年第7期4-7,共4页Journal of Transducer Technology

基　　金：国家自然科学基金项目(60072023);北京市传感器重点实验室资助项目(543046)

摘　　要：解释了加速度对气体摆式倾角传感器的影响机理。采用有限元方法,利用ANSYS-FLOTRANCFD软件,通过建模、划分网格、加载和求解等途径,计算了在不同加速度作用下传感器敏感元件内的温度场和对流场。计算结果和实验数据表明:加速度作用于气体摆式倾角传感器与倾角作用于气体摆式倾角传感器类似,同样会改变两热源处的气流速度之差,引起两热电阻丝上电流之差的变化,电桥输出一个对应于加速度的电压。The mechanism of effect of the acceleration on gas pendulum tilt sensor is preliminary elucidated.Using the finite element method,the temperature field and the stream field in sensing element of the sensor under the effect of the different acceleration have been obtained by a series of procedure,such as model building,meshing,loads applying and equation solving.In the process ANSYS-FLOTRAN CFD program is applied.By the numerical results and experiments,the effect of input acceleration on gas pendulum tilt sensor is analogous to the effect of input tilt angle on the sensor,which also will change the velocity of gas flow at two point heat source,so lead to change of the current difference of both hot wires,finally the bridge outputs a voltage signal corresponding to the acceleration.

关 键 词：气体摆 加速度 倾角 温度场 对流场 

分 类 号：TN379[电子电信—物理电子学] TN37