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在柱状的密闭腔内沿轴向对称的位置设置两根平行的热敏丝,腔内近热源处的气体由于密度小向上运动,腔壁处密度大的气体受重力场作用向下运动,形成气体摆,气体的密度差是由温度差引起的。将两根热敏丝r1、r2组成惠斯顿电桥的两个可变臂,它们既做热源,又兼敏感元件。通电时,热敏丝加热腔内气体,当两根热敏丝平置时,由于受气流影响相同,r1=r2,电桥输出的电压为零,当它们倾斜时,热敏丝受不同气流影响,r1≠r2,电桥输出电压不为零。平衡姿态传感器就是根据倾斜角度和温度的关系设计的。
Two parallel thermosensitive filaments are arranged symmetrically along the axial direction in the columnar airtight chamber. The gas near the heat source in the chamber moves upwards due to its low density, and the gas with a large density at the cavity wall moves downward by the action of the gravitational field. Gas pendulum, gas density difference is caused by the temperature difference. The two thermo-sensitive wires r1, r2 form the two variable arms of the Wheatstone bridge, both as heat sources and as sensitive components. When the power is on, the heating wire heats the gas in the cavity. When the two heat-sensitive wires are laid out flatly, the voltage output by the bridge is zero due to the same influence of the air flow. When they are inclined, the heat- Affect, r1 ≠ r2, the bridge output voltage is not zero. Balance attitude sensor is based on the relationship between tilt angle and temperature design.