I want to measure the distance between the back of a human body, and the chest. This is denoted in the image below, where Point A is the back and Point B is the chest:

enter image description here

I do not wish to measure the diameter of the chest. Rather, the direct path from Point A, to Point B ( Through the Ribcage ). Do any mobile sensors exist that can help me capture this data, which can be worn by the applicant at all times? ( During sleep, walking, running, etc.)


1 Answer 1


The simplest answer would be "a large pair of calipers". In fact, they make such a tool for exactly this task. See http://www.seritex.com/gpm-large-spreading-caliper-rounded-ends-108/

The GPM Large Spreading Caliper with rounded ends provides accurate measurement of the distance between two points, where one or both points may not be on a flat surface. This Large Spreading Caliper can also be used for the measurement of Anterior-Posterior chest depth.

The ends of the spreading branches are rounded for the patient's comfort, as opposed to the GPM Large Spreading Caliper model 109, which has pointed ends.

The GPM Large Spreading Caliper with rounded ends is manufactured from chrome plated steel. Hinged at the base, the two curved branches with rounded ends are connected by a pivotal ruler, which is engraved in millimeter intervals from 0 to 60 cm. The branches can be immobilized in any position by a screw located on the slider which guides the ruler. The ruler gives the precise distance between the two points over which the measurement has been taken.

Or you could improvise by using something like this:

enter image description here

NOTE: The OP changed the question to include the "mobile and wearable" requirements, after this answer was written.

  • $\begingroup$ Not sure I see how this is a sensor? $\endgroup$
    – angryip
    Aug 8, 2017 at 10:43
  • 1
    $\begingroup$ All you need is a sensor that detects the position ie opening of the caliper arms and you have a solution. $\endgroup$
    – Solar Mike
    Aug 8, 2017 at 11:09
  • $\begingroup$ I am looking for sensors that can be placed on the chest and the back to measure distance through the ribcage. A huge caliper is a no-go. $\endgroup$
    – angryip
    Aug 8, 2017 at 11:17
  • $\begingroup$ @angryip Clairifying the question is perfectly fine. Expecting that everyone will connect all the dots for you is a bit much. $\endgroup$
    – JMac
    Aug 8, 2017 at 11:53
  • $\begingroup$ The reason I phrased my original question with just sensors was that I inferred mobility. The answer did not, hence why I updated it. $\endgroup$
    – angryip
    Aug 8, 2017 at 11:57

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