自适应环境温度变化的压力式温度仪表的研制

针对如今的市场对压力式温度仪表的精度和操作简洁性有了更高的要求,提出了一种毛细管补偿方法来解决环境温度变化对压力式温度仪表精度的影响。该补偿的原理是在测温系统中置入一个反向偏转机构,反向偏转机构连接一根新增的毛细管,当外部环境温度变化时引起毛细管中感温介质的压力变化,压力变化通过反向偏转机构带动指针的偏转来实现反向补偿。通过传动机构与弹簧管理论分析证明该补偿机构的有效性,并经实验对比了带补偿机构与无补偿机构测温仪表的测量误差,分析得出带补偿机构的温度仪表能使测温仪表的精度得到较大的提高。

Adaptive environmental temperature changeSthe development of the temperature instrument in pressure type

Nowadays precision and operational simplicity of the temperature measuring instrument in pressure type are required in higher standards in the market. Aiming at this problem, a new method of temperature compensation using a catheter is proposed. In this method, it successfully improves the precision of the measuring instrument, which the environmental temperature has the influence on it. The principle of this compensation instrument is setting up a reversed deflection mechanism in the temperature measurement system, which connects an extra tube. When the temperature of the external environment changes, it accordingly causes the pressure of the liquid medium in the pipe to change. It completes the function of temperature compensation with the power of the a reverse deflection mechanism to drive the pointer circling on the opposite way. While the power comes from the change of the medium pressure. And it proves the Reversed deflection mechanism is effective by analyzing the theory of the transmission mechanism and the bourdon spring. In final, the experimental date collected with this method is compared with the one gained using the instrument without compensation mechanism, it testifies the result with proposed method presents more accurate in temperature measurement.