美国戴蒙德·沙姆罗克公司在通往德克萨斯麦基炼油厂的输油管线上，安装了新型计量装置──自动润滑容积式流量计。该流量计的基本原理为：当其中的带槽转盘通过磁阻式传感器的电磁场时，产生一个输出信号，该信号由流量计上的放大器放大，再传送给数字显示装置或控制仪表。此 The U.S. Diamond Mill Schlumberger installed a new metering device, the Automatic Lubrication Positive Displacement Flowmeter, on the pipeline to the McGee refinery in Texas. The basic principle of the flow meter is that when one of the slotted carousels passes through the magnetic field of the magnetoresistive sensor, an output signal is generated which is amplified by an amplifier on the flow meter and sent to the digital display or control meter. this