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A Sensor Probe Blowing for Inspecting Conduit Interiors in Telecommunication Industry

用于检查电信行业管道内部的传感器探头吹气

基本信息

批准号：
06650219
负责人：
HORII Kiyoshi
金额：
$ 0.26万
依托单位：
Shirayuri College
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

A sensor probe for inspecting conduit interiors in telecommunication industry has been blown with high stability trough long distances using spiral airflow.A sensor probe stabilization can be achieved by controlling three physical factors ; the wake in the rear of the probe should stabilize with less agitation, the annular flow instability between the probe and the inner wall of a conduit should be small, and pressure distributions between the front and the rear in a probe should be symmetric.These requirements has been achieved by using spiral airflow and streamlined probes. A streamlined probe should generate a smother flow with less agitation of wake in the rear of sensor probe compared to the other probes. A steep axial velocity distribution of spiral airflow has rotated a probe around the conduit axis, resulting in a stabilization of the wake in the rear of a probe. Furthermore it has fixed the tail of wake toward the conduit axis, leading the maintain of a steep velocity profile in spiral airflow. This probe stabilization was achieved by synergism between the spiral airflow and probe.Second stage to put to practical use, parachute performances for pulling a sensor probe has been investigated. Spiral airflow has helped to create a high drag force on the parachute by keeping the parachute fully inflated during the inspection process, due to a small fluctuation of radial component in spiral airflow. An approximate solution is presented to explain the effect.

一种用于电信行业管道内部检测的传感器探头，采用螺旋气流长距离高稳定性地吹制，通过控制三个物理因素可以实现传感器探头的稳定;探针后部的尾流应该稳定而搅动较小，探针和管道内壁之间的环形流动不稳定性应该较小，探头前后压力分布应对称，采用螺旋气流和流线型探头可满足这些要求。与其他探头相比，流线型探头应在传感器探头后部产生更少的尾流搅动。螺旋气流的陡峭轴向速度分布使探头围绕导管轴线旋转，从而使探头后部的尾流稳定。此外，它还将尾流的尾部固定在管道轴线上，使螺旋气流保持陡峭的速度分布。这种探测器的稳定性是通过螺旋气流和探测器之间的协同作用实现的。第二阶段投入实际使用，降落伞性能拉动传感器探头已被研究。由于螺旋气流中径向分量的波动很小，因此螺旋气流通过在检查过程中保持降落伞完全充气而有助于在降落伞上产生高阻力。一个近似的解决方案来解释的效果。