User Manual

ManualsBrandsJapan Radio ManualsElectronicsGround Penetrating Rader

- 51 -

3.4.3 Deduction processing

This processing is used to remove the strip reflected waves located at the deep area of 20cm and

more on the scan result after a scan as shown in Figure 3-16. Perform the following steps to use this

processing.

(1) Press the 6 PRCS key.

The setting field of the PROC at the bottom line of the scan screen is video-inverted. Then the

image processing mode starts.

(2) Set SUB to the PROC by pressing the cursor keys ▲▼.

(3) Move the cursor to the area not showing any detected objects by pressing the cursor keys

(Refer to Figure 3-16 A (1).)

(4) Press the 5 ENTER key. Then the deduction processing is performed by using the reflected

wave at the cursor position. The marker ↓ is displayed at the cursor position in the distance

gauge. (Refer to Figure 3-16 B.)

(5) To exit from the image processing mode, press the 6 PRCS key again.

The setting field of the PROC changes to normal display. Then the image processing mode

finishes.

• When SUB (Deduction) is set with the cursor keys ▲▼ after manual surface wave

processing (including real-time manual deduction processing) and deduction processing, the

image generated through deduction processing using the reflected wave of cursor position

(indicated by ↓ ) of the last executed processing is displayed. (Deduction processing can

be newly performed by moving the cursor and pressing the 5 ENTER key.)

→See Section 3.2.5 Real time manual deduction processing regarding the real time manual

deduction processing.

• If manual surface wave processing and deduction processing (including real time manual

deduction processing) after scanning are not performed, the image does not change when the

cursor keys ▲▼ are used to set operation to SUB (deduction). (Deduction processing can

be performed by moving the cursor and pressing the 5 ENTER key.)

• To perform deduction processing again, repeat steps (3) and (4).

• Manual surface wave processing and deduction processing are almost the same but have a

different processing range.

・Manual surface wave processing: area where the effect of surfaces waves is high

・Deduction processing: full search depth

Deduction processing may eliminate reflected waves such as waves reflected by the rear

surface of a concrete wall.

→ For details, see Section 3.4.1 Fixed surface wave processing.

• When the real-time manual deduction processing is selected for the cursor line containing the

reflection wave from the targeted object (ex:rebar), this image processing has possibility of

producing unwanted noise on the display by the influence of this reflection wave signal from

the object.

Remarks

Summary of content (6 pages)

PAGE 1
3.4.3 Deduction processing This processing is used to remove the strip reflected waves located at the deep area of 20cm and more on the scan result after a scan as shown in Figure 3-16. Perform the following steps to use this processing. (1) Press the 6 PRCS key. The setting field of the PROC at the bottom line of the scan screen is video-inverted. Then the image processing mode starts. (2) Set SUB to the PROC by pressing the cursor keys ▲▼.
PAGE 2
(1) Ａ. Before processing Ｂ.
PAGE 3
.4.4 Manual surface wave processing Manual surface wave processing is used when the effect of reflection near the concrete surface on the scan result can not be completely removed. (See Figure 3-17 A.
PAGE 4
The operation is performed as described below. (1) Press the 6 PRCS key . The inverted display is shown as the item for the PROC setting at the bottom of the screen and operation switches to image processing. (2) Set MAN (Manual) using the cursor keys ▲▼. (3) Use the cursor keys to move the cursor to a location where there is not a object to be probed in the scan results. (See Figure 3-17 A) (4) Press the 5 ENTER key.
PAGE 5
3.4.5 Average wave processing This image processing calculates the average reflected wave of the entire A-mode data in the scan results, subtracts the calculated average wave from each A-mode data, and displays the processed data. The average processing is effective to remove the constant horizontal strip noise appearing in the scan result. (This processing removes the constant signal existing at the some depth like the reflected wave from the far side of the wall.
PAGE 6
(4) To end the image processing mode, press the 6 PRCS key again. The normal display is shown as the item for the PROC setting at the bottom of the screen and image processing mode is exited. Figure 3-18 shows sample display when peak processing is performed for the result of manual surface wave processing.