Systems and methods for inspecting and monitoring a pipeline

A method of inspecting and monitoring an inner surface of a pipeline, comprising:

• introducing a movable inline inspection device into the pipeline, the movable inline inspection device having one or more optical computing devices arranged thereon adjacent the inner surface of the pipeline, wherein each optical computing device has at least one integrated computational element arranged therein;
• optically interacting electromagnetic radiation radiated from at least one substance present on the inner surface of the pipeline with the at least one integrated computational element of each optical computing device;
• determining with the signal processor a characteristic of the at least one substance detected by each optical computing device;
• emitting electromagnetic radiation from an electromagnetic radiation source arranged in each optical computing device;
• optically interacting the electromagnetic radiation from each optical computing device with the at least one substance;
• generating optically interacted radiation to be detected by the at least one detector in each optical computing device, wherein the at least one detector in each optical computing device is a first detector;
• receiving and detecting with a second detector arranged in each optical computing device at least a portion of the electromagnetic radiation;
• generating with each second detector a compensating signal indicative of radiating deviations of the corresponding electromagnetic radiation source of each optical computing device;
• and
• computationally combining the output signal and the compensating signal of each optical computing device with the signal processor communicably coupled to the first and second detectors of each optical computing device, whereby the characteristic of the at least one substance is determined.