Active distributed temperature sensing (A-DTS)
Active distributed temperature sensing is a powerful measurement method based on artificial thermal stimulation using heat pulse techniques to apply a known power input to a medium while monitoring the resultant thermal response.
The analyses of trends and absolute values of the temperature increase and subsequent decrease within a medium allows its thermal properties or related attributes and processes such as fluid presence and flow to be characterized in-situ. The method also has significant utility in environments where significant natural temperature gradients are not present.
The combination of active thermal response methods with distributed temperature (or acoustic) sensors allows detailed characterization of thermal attributes with high spatial density, over long distances.