JP2599558Y2 - Ultrasonic measurement data reading scale - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic measurement data reading scale.

[0002]

2. Description of the Related Art As shown in the left side of FIG. 4, a trench in an underground continuous wall is formed by discharging earth and sand together with muddy water while lowering an excavator into the ground, so that changes in the stratum, Is affected by changes. Therefore, it is not always possible to excavate a groove exactly at the position coinciding with the design line, and some extra excavation may occur. A measuring device using ultrasonic waves has been developed and widely used as a device for measuring whether or not such a shape after excavation is excavated as planned. In this method, an ultrasonic groove wall measuring device is suspended at the center of a groove filled with muddy water as shown on the right side of FIG. 4, and the time difference between reflected ultrasonic waves is measured to grasp the shape of the groove wall. It is a device to do.

[0003] These measurement results are plotted as a graph of the shadow line of the reflected wave, and the results are compiled in a report. In this case, it is necessary to record the graph as a deviation amount of the center line as shown in FIG. In this case, the “center line” is a line at the depth, which is a continuous line of the center point between the actually excavated right wall surface and the left wall surface.

[0004] Therefore, even if the left and right wall surfaces are dug, if the left and right dug amounts are the same, the excavation center point at that depth is accurate. Also, if the groove wall on the right side is as designed and there is an extra 10 cm excavation on the left side, the excavation center point is deviated by 5 cm on the left side. However, in reality, such cases are rarely simple, and the amount of extra digging on the left and right walls varies in a complicated manner. Therefore, it is necessary to read the left and right excess digging amounts from the ultrasonic graph on a scale, calculate the difference between them, determine the digging center point, and write the record table shown in FIG.

[0005]

[Problems to be Solved by the Invention] The above-mentioned work must be performed on a huge amount of data. Conventionally, however, an engineer used a triangular scale to read the left and right digging amounts, determined the center point position by mental arithmetic, and entered it in a record table. For this reason, there has been a problem that a certain amount of skill, a great deal of time and effort are required, and errors such as reading errors and calculation errors are likely to occur.

[0006]

The purpose of the present invention is to solve the above-mentioned conventional problems, and it is possible to determine the center point without requiring much skill and without any calculation. It is intended to provide a data reading scale.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the ultrasonic measurement data reading scale of the present invention uses a graph G on which the shapes of the right and left wall surfaces are projected and after ultrasonic measurement. Is a transparent plate that overlaps with the center line, draws a center line at the center, draws a deviation amount line indicating the amount of deviation parallel to the center line on the left and right, and further on both sides outside the deviation line Is an ultrasonic measurement data, characterized by drawing a groove wall line equidistant with the center line, and drawing this groove wall line by continuously plotting the positions of the same distance on the left and right with the center line as the center It features a reading scale.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an ultrasonic measurement data reading scale according to the present invention will be described below with reference to the drawings.

<A> Overall Configuration The scale S of the present invention is a transparent plate used to be superimposed on a graph G on which ultrasonic measurement data is projected. The scale S is defined by a center line 1 drawn on this transparent plate, a displacement line 2 drawn in parallel on both sides thereof, and a groove wall line 3 in which positions at equal distances on both sides are continuously plotted. Constitute.

<G> Graph G On the other hand, the graph G representing the data has a fixed width of the paper and different dimensions of the object to be measured. Therefore, the deviation amount of the wall surface of the groove is shown in the graph G by the scale used at that time, and, for example, an extra depth of 10 cm on the actual wall surface is represented by 5 mm in the graph G.

<C> Center line 1, deviation amount line 2 One center line 1 is drawn at the center of the scale S of the transparent plate.
On the left and right of the center line 1, a plurality of deflection lines 2 are drawn in parallel with the center line 1 at equal intervals. This deviation amount line 2
Is a line indicating the amount of deviation of the excavated trench. The interval between the scales of the deviation amount line 2 employs a size corresponding to the scale of the graph G. Therefore, in the previous example, when the deviation of the excavation center line is 10 cm in actual excavation, it is represented by 5 mm on this scale S. In actual excavation, the deviation of the center line 1 is around 10 cm at maximum,
The deviation amount line 2 may be drawn on the scale S at a position of about 5 mm to 10 mm, and the positions may be described as 10 cm and 20 cm.

<D> Groove wall surface line 3 On both side positions outside the deviation line, the groove wall surface line 3 is drawn at the same distance as the center line 1. The line drawn on the right side is the wall surface line 3 for adjusting to the right side of the wall surface of the graph G, and the line drawn on the left side is the wall surface line 3 for adjusting to the left side of the wall surface of the graph G. This groove wall surface line 3 is drawn by continuously plotting positions at equal distances on the left and right with the center line 1 as an axis. That is, when the width of the excavated trench is, for example, 150 cm as designed, the point on the wall surface is plotted on the scale S at a position (3.5 cm in scale) marked 75 cm from the center line 1. It is convenient if this position is described as a "standard line with a groove wall width of 1.5 m". Thus centerline 1
When the plot is continuously plotted at equal distances on the left and right with respect to the axis, the groove wall surface line 3 eventually assumes a divergent line shape.

<E> Method of Use The scale S having the above configuration is superimposed at, for example, a position at a depth of 5 m on the graph G. In the graph G, the design center line a to be excavated and the shape of the actually excavated wall surface are set out as the excavated wall surface b. Therefore, the position is searched while moving the scale S so that the groove wall lines 3 on both sides of the scale S and the shapes of the wall surfaces on both sides of the graph G at a depth of 5 m coincide with each other.

At a depth of 5 m, it is assumed that one of the grooves (for example, the right wall surface) has no extra digging, and the other wall (the left wall surface) has 15 cm of extra digging. Then, in a state where the left and right wall lines 3 of the scale S coincide with the excavation wall surface b of the graph G, the center line 1 of the scale S is largely shifted to the left from the designed center line a of the graph G. When the center line 1 of the scale S shifts to the left in this way, the design center line a drawn in the graph G below the scale S shifts to the right. Then, one of the deviation amount lines 2 on the left side of the scale S overlaps the design center line a of the graph G. The displacement amount line 2 thus overlapped
Is the actual excavation excursion at that location. For example, in the example of FIG. 3, it can be seen that the center point of the actually excavated groove is shifted to the left by 8.5 cm from the design center line a. In this way, the value of the deviation amount line 2 is read, and this is entered in the table shown in FIG. 5 as the center position of the actual excavation shape.

[0015]

[Effect of the Invention] The ultrasonic measurement data reading scale of the present invention is as described above, so that the displacement amount from the center line 1 can be easily, quickly and accurately determined by one scale in any excavation state. It can be read. For this reason, there is no need for any mental arithmetic, such as adding the amount of extra digging on both sides to halve, and no skill or mistake in calculation occurs.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of an ultrasonic measurement data reading scale according to the present invention.

FIG. 2 is an explanatory diagram of a use state.

FIG. 3 is an explanatory diagram of a state where data and a scale are superimposed.

FIG. 4 is an explanatory view of a construction state of an underground wall.

FIG. 5 is an explanatory diagram of a form for entering data.

Claims (2)

(57) [Scope of request for utility model registration] 1. A transparent plate superimposed on a graph after ultrasonic measurement, wherein the shape of the left and right wall surfaces is projected, a center line is drawn at the center, and the left and right sides are parallel to the center line. Draw a deviation line indicating the amount of deviation, and draw a groove wall line equidistant from the center line on both sides outside the deviation line, and this groove wall line Ultrasonic measurement data reading scale characterized by continuously plotting and drawing positions at equal distances 2. A transparent plate superimposed on a graph after ultrasonic measurement, wherein the shape of the left and right wall surfaces is projected, a center line is drawn at the center, and the left and right sides are parallel to the center line. Draw a deviation line indicating the amount of deviation, and draw a groove wall line at the same distance from the center line on both sides outside the deviation line, and this groove wall line is divergent around the center line. Ultrasonic measurement data reading scale characterized by continuously plotting and drawing positions at equal distances on the left and right