US 9,809,934 B2
Method for characterizing the seat of a railroad track, device for viewing the inside of a ground and assembly for characterizing the seat of a railroad track comprising such a device
Roland Gourves, Marsat (FR); and Younes Haddani, Chanonat (FR)
Assigned to SOL SOLUTION, Riom (FR)
Filed by SOL SOLUTION, Riom (FR)
Filed on Sep. 14, 2015, as Appl. No. 14/852,964.
Claims priority of application No. 14 58644 (FR), filed on Sep. 15, 2014.
Prior Publication US 2016/0076203 A1, Mar. 17, 2016
Int. Cl. E02D 1/02 (2006.01); G01N 33/24 (2006.01); E01B 35/00 (2006.01); G01N 3/48 (2006.01); E01B 1/00 (2006.01); G01N 3/42 (2006.01); H04N 5/225 (2006.01)
CPC E01B 35/00 (2013.01) [E01B 1/00 (2013.01); G01N 3/42 (2013.01); G01N 3/48 (2013.01); H04N 5/225 (2013.01); E02D 1/022 (2013.01); H04N 2005/2255 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for characterizing a seat of a railroad track through penetrometric and geo-endoscopic tests, the method comprising the following steps:
a) striking a ram head of a light dynamic penetrometer to insert a tip of a train of rods into the seat,
b) measuring the resistance of the seat as a function of an insertion depth of the train of rods,
c) removing the train of rods from the seat,
d) pushing a tube into a hole left by the train of rods, and
e) sliding an image-recording camera inside the tube, and the following additional automated steps:
f) continuously measuring the position of the camera while the camera slides inside the tube, i.e., the depth at which the images are recorded, and
g) coupling an analysis of the recorded images as a function of the depth with the strength measurements of the seat to characterize different layers of the seat,
wherein the analysis of the images recorded by the camera as a function of the depth, during step g), is done from the variation of different parameters relative to the recorded images and wherein step g) includes two automated sub-steps consisting of:
i. automatically determining significant depth values, from which the various parameters relative to the recorded images and the resistance of the seat vary considerably, and
ii. performing a statistical analysis of the significant depth values to estimate the depth of the layers of the seat.