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钳式时差式流量计是利用宽幅电子束振子激励管道中的自然声波导管,以便产生一沿管壁轴向传播的声波。当该声波向前传播的时候,它以宽幅电子束的形式发出穿过液体的声能。这束电子到达管壁的另一侧并且沿此管壁传播,被传感器所接收。声能从上游方向发出时,到达对面传感器所需的传播时间,比从下游发出时到达对面传感器所需时间长,计量仪就是利用对这个时间差的测量来测量流动速度。钳式时差检漏系统是一系列安装的现场测量站,它除有时差流量计量仪和一台温度探测器外,还有无线或卫星通信设备。它能对管道流量的增加和管道热膨胀或收缩进行检验;在屏幕上可以进行实时界面检验,同时可以显示出每批输量的实际体积;对输送介质进行监控、不断地判断产品的类型和等级;确定泄漏源位置并发出警报;对清管器进行现场检验与报警。为了避免发出错误警报,系统具有自动使用条件监测功能。
Caliper time-flow meter is the use of wide-band electron beam vibrator excitation natural duct in the pipeline, in order to produce a wall along the axial transmission of sound waves. As the sound wave travels forward, it emits sound energy across the liquid in the form of a broad electron beam. The beam of electrons reaches the other side of the tube wall and travels along the tube wall and is received by the sensor. When the sound energy is emitted from the upstream direction, the propagation time required to reach the opposite sensor is longer than the time required to reach the opposite sensor when it is emitted downstream, and the meter measures the flow rate using this time difference measurement. Caliper time difference leak detection system is a series of installed on-site measuring stations, in addition to its time difference flow meter and a temperature detector, there are wireless or satellite communications equipment. It can increase the pipeline flow and pipeline thermal expansion or contraction of the test; on the screen can be real-time interface test, at the same time can show the actual volume of each batch of the volume of transmission media monitoring, continue to determine the type and level of the product ; Determine the location of the source of the leak and issue an alarm; on-site inspection and alarm on the pig. To avoid false alarms, the system has automatic usage condition monitoring.