【摘要】 利用电感随井管材料介质变化的特点,研制了适合于井下高温环境的电感测控电路。该电路把生成的电压三角波转换成电流三角波,由电感作用形成方波,经绝对值电路实现随材料介质变化的直流信号。该电路具有高温下使用可靠性强、控制精确、便于操作的优点。更多还原

【Abstract】 The measure and controlling circuit at high temperature in well with the magnetic induction changing for the medium of oil pile had been researched.The circuit changes voltage trigonal into current trigonal wave,and the square-wave is formed by inductance,which is converted to the DC signal with the changing of medium by absolute circuit.The circuit has many properties,such as small volume,low power dissipation,stronger dependability,accurate measurement,simple operation and so on.更多还原