US 11,946,877 B2
Construction material assessment method and systems
Pouria Ghods, Gloucester (CA); Rouhollah Alizadeh, Nepean (CA); Andrew Fahim, Ottawa (CA); Sarah De Carufel, Ottawa (CA); and Mustafa Salehi, Nepean (CA)
Assigned to Giatec Scientific Inc., Nepean (CA)
Appl. No. 17/052,434
Filed by Pouria Ghods, Gloucester (CA); Rouhollah Alizadeh, Nepean (CA); Andrew Fahim, Ottawa (CA); Sarah De Carufel, Ottawa (CA); and Mustafa Salehi, Nepean (CA)
PCT Filed May 3, 2019, PCT No. PCT/CA2019/000057
§ 371(c)(1), (2) Date Nov. 2, 2020,
PCT Pub. No. WO2019/210389, PCT Pub. Date Nov. 7, 2019.
Claims priority of provisional application 62/666,188, filed on May 3, 2018.
Prior Publication US 2021/0063336 A1, Mar. 4, 2021
Int. Cl. G01N 22/00 (2006.01); B28C 5/42 (2006.01); B28C 7/02 (2006.01); G01N 3/06 (2006.01); G01N 9/24 (2006.01); G01N 15/08 (2006.01); G01N 23/00 (2006.01); G01N 27/06 (2006.01); G01N 27/22 (2006.01); G01N 33/38 (2006.01); G06N 20/00 (2019.01); G16C 20/70 (2019.01); G16C 60/00 (2019.01)
CPC G01N 22/00 (2013.01) [B28C 5/422 (2013.01); B28C 7/02 (2013.01); G01N 3/066 (2013.01); G01N 23/00 (2013.01); G01N 27/221 (2013.01); G06N 20/00 (2019.01); G16C 60/00 (2019.02); G01N 9/24 (2013.01); G01N 15/08 (2013.01); G01N 27/06 (2013.01); G01N 33/383 (2013.01); G16C 20/70 (2019.02)] 19 Claims
OG exemplary drawing
 
1. A method of performing an assessment of a predetermined characteristic of a concrete structure comprising:
applying a narrow electrical pulse to a pair of first electrodes in contact with an area of the concrete structure containing a rebar;
measuring a time dependent voltage response from a pair of second electrodes in line with and between the pair of first electrodes and in contact with the area of concrete structure containing the rebar;
fitting the measured time dependent voltage response to a theoretical transient to establish a fitted transient function;
determining constants of the fitted transient function; and
determining one or more electrical equivalent circuit elements of an equivalent circuit model of the concrete structure containing the rebar in dependence upon the constants of the fitted transient function; and
the predetermined characteristic of the concrete structure is established in dependence upon the determined one or more electrical equivalent circuit elements of the equivalent circuit model of the concrete structure.