Self-contained portable positionable oscillating motor array with strap tension sensing elements

A system, comprising:

• a wearable harness of a medical device positionable on a torso of a subject;
• one or more straps coupled to the wearable harness for securing the wearable harness on the torso of the subject;
• a plurality of engines coupled to the wearable harness, wherein the plurality of engines applies, during use, an oscillation force to at least one treatment area of the subject to mobilize a secretion in an airway within the subject substantially adjacent to the at least one treatment area;
• at least one force sensing element integrated with a strap of the one or more straps, wherein the at least one force sensing element comprises:
• a first non-conductive sensor body element comprising a first surface;
• a second non-conductive sensor body element comprising a second surface facing the first surface of the first non-conductive sensor body element;
• and
• a force sensor positioned between and in contact with the first and second surfaces of the first and second non-conductive sensor body elements,
• wherein the force sensor has at least one property that changes with load applied to the force sensor by the first and second non-conductive sensor body elements in response to force applied to the at least one force sensing element from the strap, and
• wherein the force sensor defines a plane disposed between the first and second surfaces of the first and second non-conductive sensor body elements such that the load applied by the non-conductive sensor body elements to the force sensor is applied substantially along the plane of the force sensor;
• and
• a controller associated with the wearable harness, wherein the controller is configured to:
• receive a measurement of the at least one property from the force sensor;
• and
• determine a tension force applied to the at least one force sensing element by the strap based on the measurement of the at least one property.