Method and device for processing signals representative of waves reflected, transmitted or refracted by a volume structure with a view to exploring and analyzing this structure
First Claim
1. A method for exploring and analyzing a structure of a medium by means of a set of a plurality of detection elements independent from one another, for detecting waves coming from points of said medium, said method having a measurement phase comprising the successive steps of:
- transmitting at least one incident wave in said structure;
receiving waves coming from the structure encountered by the incident wave inside said medium, by each of said detection elements;
digitizing signals supplied by said detection elements into digitized data and storing said data in a field memory having a two-dimensional structure comprising a plurality of rows and columns, the data corresponding to the waves detected by each of said detection elements being stored in a respective column of said field memory; and
for each point of said medium reading said field memory and adding all data contained in said field memory at addresses associated to said point and stored in an addressing memory, a value representative of the importance of the wave coming from said point being obtained by multiplying the added data by a correction factor,said method having an initialization phase performed prior to said measurement phase and comprising the steps of;
for each point of said medium, determining all addresses of said field memory containing the data corresponding to waves coming from said point and detected by said detection elements, as a function of a position of said point with regard to respective positions of said detection elements, andstoring said addresses for each point in said addressing memory.
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Abstract
To explore and analyze the structure of an object (O), the method according to the invention comprises transmission of at least one incident wave into said structure, reception of the waves retransmitted by the structure, by a plurality of independent detection elements (D1, Dn); memorization after digitization of the data supplied by the detection elements, in a field memory (MC); in respect of each point (Pij) of the object (O), computation of the positions occupied, in the field memory by the signals detected by the detection elements (D1, Dn) corresponding to the waves coming from said point (Pij); then reading of the field memory and addition of all the values contained in the memory positions corresponding to each point (Pij), the value (Vp) representative of the importance of the wave coming from said point (Pij) being obtained by multiplying the result of the addition by a correction factor (K).
36 Citations
25 Claims
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1. A method for exploring and analyzing a structure of a medium by means of a set of a plurality of detection elements independent from one another, for detecting waves coming from points of said medium, said method having a measurement phase comprising the successive steps of:
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transmitting at least one incident wave in said structure; receiving waves coming from the structure encountered by the incident wave inside said medium, by each of said detection elements; digitizing signals supplied by said detection elements into digitized data and storing said data in a field memory having a two-dimensional structure comprising a plurality of rows and columns, the data corresponding to the waves detected by each of said detection elements being stored in a respective column of said field memory; and for each point of said medium reading said field memory and adding all data contained in said field memory at addresses associated to said point and stored in an addressing memory, a value representative of the importance of the wave coming from said point being obtained by multiplying the added data by a correction factor, said method having an initialization phase performed prior to said measurement phase and comprising the steps of; for each point of said medium, determining all addresses of said field memory containing the data corresponding to waves coming from said point and detected by said detection elements, as a function of a position of said point with regard to respective positions of said detection elements, and storing said addresses for each point in said addressing memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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- 21. A device for exploring and analyzing a structure of a medium comprising a probe composed of a plurality of independent transmission/reception units each connected to a wave generator, via two conduction threshold diodes mounted head-to-foot, and to an analog-to-digital converter having an output connected to a write input of a field memory in which reading is controlled by an addressing memory driven by a clock via a counter, the read output of the field memory being connected to an adder having an output connected, via a correction means, to a write input of an image memory driven by said counter, the correction means being driven by a device for counting the number of values above a predetermined threshold, read in the field memory and added together.
Specification