PR761-235100-R01 Minimally Intrusive Multi Sensors for Inline Deployment

This report describes the design and construction of novel sensor bodies that will be used as Minimally Intrusive Tools (MIT) devices. The overarching requirement for MIT devices is that they can be introduced into a pipe through existing entry points, such as National Pipe Thread (NPT) threaded sensor locations, small bore valve take-offs, and full-bore valves with access (if available). The aim of the SPIM-2-4 project was to conceptualize several body shapes that could be used to create MIT devices. In the work scope of SPIM-2-4, these bodies did not contain any payload sensors or electronics. They were dummies manufactured to be tested in a flow loop, and their behaviors were observed. From these observations, conclusions were made on the shares best suited for MIT devices.
A number of candidate designs were created and manufactured. They were deliberately chosen to be radically different in shape to make sure they were not the same as existing devices, which tend to be spherical. The aim of the project was to assess the hydrodynamic stability of the shapes and determine if they were suitable platforms for carrying sensors such as Micro Electronic Mechanical Systems (MEMS), and other yet-to-be-developed devices.
In order to test the shapes, a flow loop was constructed with a variable flow rate and a number of features such as a ‘T’, a ‘Y’ and a restricted section. A number of sections were constructed from clear PVC pipe to allow observation and photography of the shapes in motion.
Several test runs were carried out for each candidate's body shape, and the speeds and dynamic characteristics of each shape were noted. These tests were analyzed and used to make recommendations and conclusions.