高温应变仪

• 作 者: 张佑国
• 出 处: 仪器制造
• 发表日期: 1979年02期
• 关键词: 应变仪 高温 容量变化 静电 电气 电极 电容 蠕变变形 长度 不锈钢

英国G.V.布雷那公司与英国电气研究所共同研制了C4型、C5型高温应变仪,这种应变仪可以准确测量钢铁、不锈钢等在红热状态和受到较大冲击时的应变,由于性能稳定甚至可以使用于测定在上述状态中经过了一年以上的蠕变变形。应变的测定采用了静电电容法,应变变换器把长度变化机械放大,使电容量变化,从而来测定应变。电容的电极由白金制成,用精制的高密度陶瓷绝缘。

British GV Brena company and the British Institute of Electrical jointly developed the C4 type, C5 type high temperature strain gauge, the strain gauge can accurately measure the steel, stainless steel and other red-hot state and subjected to greater impact strain, due to stable performance or even It can be used to measure creep deformation of more than one year in the above state. Strain measurement using the electrostatic capacitance method, the length of the strain converter mechanical amplification, so that changes in capacitance, in order to determine the strain. The electrodes of the capacitor are made of white gold and are insulated with a refined, high-density ceramic.