JP2000074651A - Device for measuring concrete specimen and measuring method using the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the size of a specimen efficiently in a short time. SOLUTION: A rotary table 2 for rotating a concrete specimen 21 in vertical position is provided. An encoder 7 for detecting the rotation position of the rotary table 2 is provided. An upper-surface side sensor 22 which, provided above the rotary table 2, measures a distance from an upper surface 21B of the concrete specimen 21 is provided, and a side-surface side sensor 14 which, provided on the side of the concrete specimen 21 placed on the rotary table 2, measures a distance from a side surface 21C of the concrete specimen 21 is provided. With the rotary table 2 rotated, the distance from the upper surface 21B of the specimen 21 is measured by the upper-surface side sensor 22 while that from the side surface 21C of the specimen 21 is measured by the side- surface side sensor 14, for efficient measurement of a height H and a diameter D of the specimen 21 in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete specimen measuring apparatus for measuring the height and diameter of a concrete specimen and a measuring method using the same.

[0002]

Specimens used for concrete compressive strength test, tensile strength test, etc. are manufactured using a bottomed, cylindrical metal mold, and the specimen is manufactured by Nippon Kogyo. According to the standard (JISA 1132), 2
It is defined as a cylindrical shape having twice the height. For example, a mold for manufacturing the test piece has a diameter of 10 cm and a height of 20 cm, or a diameter of 12.5 cm and a height of 25 cm. Etc. are used. Since the test piece is required to have a predetermined dimensional accuracy, the mold for molding the test piece has to satisfy a predetermined dimensional accuracy in height, diameter and flatness of upper and lower surfaces.

[0003] In the method of finishing the test piece to a predetermined size with the dimensional accuracy of the mold as described above, the size of the actually formed test piece cannot be directly confirmed.

Therefore, it is conceivable to directly measure the dimensions of the test specimen after molding using a measuring instrument such as a caliper or a dial gauge. However, in the method using such a measuring device, the measurement takes time and the efficiency is low. In the conventional method based on the dimensions of the mold, a large number of specimens are formed from the mold and the dimensions of the mold are measured. However, in the method of measuring the specimen, a large number of specimens are measured. Since it is necessary to measure a specimen or a large number of extracted specimens, measurement using a measuring instrument such as a caliper or a dial gauge takes time and is difficult to reduce the measurement time.

Accordingly, an object of the present invention is to provide a concrete specimen measuring apparatus capable of efficiently measuring the dimensions of the specimen and a measuring method using the same.

[0006]

According to a first aspect of the present invention, there is provided a rotary table for vertically rotating a concrete specimen, rotating position detecting means for detecting a rotational position of the rotary table, and a rotating table for the rotary table. An upper surface sensor arranged above and measuring the distance to the upper surface of the concrete specimen, and a side surface arranged beside the concrete specimen placed on the rotary table and measuring the distance to the side surface of the concrete specimen Side sensor, elevating drive means for moving the side sensor up and down, height position detecting means for detecting the height position of the side sensor, and the height of the concrete specimen based on the measured value of the upper sensor. And calculating means for calculating the diameter of the concrete specimen based on the measured value of the side sensor.

According to the first aspect of the present invention, while rotating the rotary table, the distance to the upper surface of the specimen is measured by the upper surface sensor, and the distance to the side surface of the specimen is measured by the side sensor at the same time. . Thereby, the height of the specimen can be calculated from the measured value of the upper side sensor and the height of the known rotary table, and the diameter of the specimen can be measured from the measured value of the side sensor and the known rotary table position. Can be. When the diameter of the specimen is measured at a plurality of locations, the measurement can be performed by changing the position of the side sensor by the elevation drive means.

Further, in the invention of claim 2, the upper surface side sensor is provided so as to be horizontally movable.

According to the configuration of the second aspect, by moving the upper surface sensor horizontally, the height can be measured at an arbitrary position on the upper surface of the specimen, and the flatness and the like can be measured.

According to a third aspect of the present invention, there is provided the concrete specimen measuring apparatus according to the first aspect, wherein the rotary table is rotated, and the side drive sensor is moved up and down by the elevation drive means. This is a measurement method that measures the distance to the side of the concrete specimen using the side sensor.

According to the third aspect of the present invention, the measurement is performed while rotating the rotary table and moving the side sensor up and down, thereby continuously measuring the side surface of the specimen in a spiral manner. Can be measured three-dimensionally.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 7 show a first embodiment of the present invention. As shown in FIG.
The rotary table 2 on the disk is provided so as to be rotatable through 360 degrees, and the upper surface 2A of the rotary table 2 forms a horizontal plane. The rotation center shaft 3 of the turntable 2 is driven to rotate by rotation drive means 4 such as a rotation motor. A transmission gear 5 such as a rotation transmitting means is fixed to the rotation center shaft 3, and a driven gear 6 meshes with the transmission gear 5, and an encoder 7 for detecting rotation of the driven gear 6 is driven by a driven shaft 6A. It is connected to the driven gear 6. Accordingly, the rotation table 2 is rotated by the rotation driving means 4, and the rotation is transmitted to the encoder 7 by the gears 5, 6, and the calculation means described later uses the detection signal corresponding to the angle from the encoder 7 to calculate the rotation table 2. Is calculated, and the encoder 7 constitutes a rotation angle detecting means for detecting the rotation angle of the turntable 2 in this manner.

On the machine body 1, a female screw rod 11 is provided vertically on the side of the rotary table 2, and the female screw rod 11 is moved up and down by a vertical drive means 12 such as a rotary motor. Rotate in position. The female screw rod 11 includes the female screw rod 11
The elevating body 13 is screwed to the female screw rod 11 and is moved up and down in the same horizontal direction by horizontal rotation preventing means (not shown).
13 is provided with a non-contact type side sensor 14.
An encoder 15 for detecting the rotation of the female screw rod 11 is provided on the upper part of the female screw rod 11, and a calculating unit, which will be described later, is operated by a detection signal from the encoder 15 corresponding to the height position of the sensor 14. The height position of the sensor 14 is detected, and thus the side sensor is detected by the encoder 15.
It constitutes height detecting means for detecting the 14 height positions.
Since the height position of the upper surface A of the turntable 2 is known, the calculation height position of the sensor 14 is calculated from the height position of the sensor 14 by a calculation unit described later.

A concrete specimen 21 is fixed vertically to the rotary table 2, and the center S of the specimen 21 is aligned with the center of the rotation center axis 3, and the bottom surface 21 A of the specimen 21 is fixed.
Is placed on the upper surface 2A of the turntable 2, and the bottom surface 21 is
A is set horizontally. Upper surface 21B of the specimen 21
A non-contact type upper surface sensor 22 is disposed above the upper surface of the main body 1. A guide member 23 for horizontally guiding the upper surface sensor 22 is provided on the machine body 1, and the upper surface sensor 22 is arranged along the guide member 23.
Moving means 24 for horizontally moving 22;
Numeral 24 drives a rack and pinion mechanism or the like to move the upper surface side sensor 22 horizontally.
Can be moved at least from the rotation center of the turntable 2 to the position of the side surface 21C of the specimen 21. Further, the body 1 is provided with position detecting means 25 including a sensor for detecting the position of the upper surface side sensor 22 and the like. Since the position of the center S of the turntable 2 is known, a horizontal distance from the center S to the side is calculated by a calculation unit described later. The upper surface 21B of the specimen 21 is
So-called capping is performed so that a load is accurately applied along the axis of the specimen 21 when performing the compressive strength test.In this capping work, a cement paste is filled into an upper portion of the mold. Then, a compression plate made of a smooth glass plate or the like is put on the cement paste, and the upper surface 21B is finished smoothly so as to cut off excess cement paste.

The side sensor 14 and the upper sensor 22 are non-contact type sensors, such as a sensor that irradiates a laser and measures a distance by reflection, a photoelectric sensor,
A sensor that irradiates an ultrasonic wave and measures a distance based on its reflection may be used.

A control device 31 composed of a computer or the like
The control means 32 includes a control means 32, a calculation means 33, and output means 34, 34A. The control means 32 includes the sensors 14, 22, the encoders 7, 15, the position detection means 25, the rotation drive means 4, and the elevation drive means. 12 and the moving means 24 are electrically connected and control means
The drive signal from the drive unit 32 drives the rotation drive unit 4, the elevation drive unit 12, and the movement unit 24, and detection signals from the sensors 14 and 22, the encoders 7 and 15, and the position detection unit 25 are input to the control unit 32. The control means 32 is provided with an operation input section 32A (not shown), and the operation input section 32A can operate the positions and operations of the sensors 14, 22 and the operation of the turntable 2. Further, based on the detection signal input to the control means 32, the calculating means 33 calculates measured values such as the height H of the specimen 21 and the distance from the center S to the side face 21C, and calculates the measured values. Calculate the measurement position. Further, the output means 34 displays the measured value at the measurement position on a display such as a display or a printer, and this display is a numerical value or the outer diameter of the specimen 21 is displayed as a three-dimensional diagram. In FIG. 3, the output means 34 is a display, which displays a three-dimensional view of the specimen 21, and the output means 34A is a printer.

Next, the method of using the measuring device main body and the control device 31 will be described.
The position of the upper surface side sensor 22 with respect to the center S of 21B is determined, and the distance from the angular position of the specimen 21 detected by the calculating means 33 based on the detection signal of the encoder 7 to the upper surface 21B for each predetermined angular position. Set to detect. For example, in FIG. 4, measurement is performed by the upper surface sensor 22 at measurement points 41 at intervals of 90 degrees, which is a predetermined angular position θ, at a position L1 from the center S of the upper surface 21A. The upper side sensor 22 is moved from the center S of the upper surface 21B to a position of a distance L2 by the above operation, and the measurement is performed by the upper side sensor 22 at a measurement point 42 at every 90 degrees which is a predetermined angular position at this position. Set by the input unit 32A. Also, the height position of the side sensor 14 is calculated based on the detection signal of the encoder 15, and the measurement position of the side sensor 14 in the circumferential direction of the specimen 21, that is, the rotation angle, is obtained based on the detection signal of the encoder 7. , The measurement position of the side sensor 14 and the distance to the side surface 21B at this measurement position are obtained. For example, according to the setting of the operation unit 32A, the side surfaces of the specimen 21 at three heights H1, H2, and H3 are set.
A plurality of distances to 21C are detected, and the calculation means 33 calculates the diameter D of the specimen 21 based on this detection signal. While rotating the turntable 2 in this manner, the height H of the specimen 21 at the measurement points 41 and 42 is determined by the upper surface sensor 22 and the control device 31.
Is calculated, thereby calculating the flatness of the upper surface 21B, the angle Kb with respect to the perpendicular to the upper surface 21B, and the like. At the same time,
While rotating the rotary table 2, arbitrary heights H 1, H 2, and H of the specimen 21 are controlled by the side sensor 14 and the control device 31.
The diameter D at three positions is calculated, and an average error of the diameter and the like are calculated from the value of the diameter D.

While rotating the rotary table 2, the side sensor 22 is moved up and down to measure the distance to the side surface 21C of the specimen 21 at an arbitrary position on the side surface 21C as shown in FIG. Next, the measurement is performed so that the measurement points 43 are substantially continuous in a spiral shape. Further, as shown in FIG. 7, the measurement is performed densely by shifting the angular positions of the continuous measurement points 43. Since the height position and the angle position in the specimen 21 are known by the encoders 7 and 15 from the measured values in the above, the arithmetic processing using Fourier transform, smoothing or the like is performed from the measured values and the measured positions. Based on the values, the outer shape of the test sample 21 is made three-dimensional, and an angle Kc formed between the side surface 21C and the upper surface 2A, which is a horizontal plane, is calculated. Further, after measuring the upper surface 21B and the side surface 21C of the specimen 21, the upper surface 21B of the specimen 21 is turned down.
Is set on the rotary table 2, and the flatness of the bottom surface 21A is measured by the upper surface side sensor 14 to calculate the flatness. Note that the “calculation” described in the present embodiment can all be performed by the arithmetic unit 33.

As described above, in this embodiment, the rotary table 2 for rotating the concrete specimen 21 in the vertical direction and the rotational position detecting means for detecting the rotational position of the rotary table 2 correspond to the first aspect. An encoder 7, an upper sensor 22 disposed above the turntable 2 for measuring the distance to the upper surface 21 </ b> B of the concrete specimen 21, and an upper sensor 22 disposed at the side of the concrete specimen 21 placed on the turntable 2. A side sensor 14 for measuring the distance to the side surface 21C of the concrete specimen 21, an elevation drive unit 12 as an elevation drive unit for vertically moving the side sensor 14, and a height position of the side sensor 15 are detected. The height H of the concrete specimen 21 is calculated based on the measured values of the encoder 15 serving as a height position detecting means and the upper surface side sensor 22, and the side surface side sensor is used.
Since it has the calculating means 33 for calculating the diameter D of the concrete specimen 21 from the measured values of 14, the distance from the upper surface sensor 22 to the upper surface 21B of the specimen 21 is measured while rotating the turntable 2. At the same time, the distance to the side surface 21C of the specimen 21 is measured by the side sensor 14, whereby the height H of the specimen 21 can be detected from the measured value of the upper sensor 22 and the known height of the rotary table 2. , Side sensor 14
The diameter D of the specimen 21 can be measured from the measured value of the above and the known center S position of the rotary table 2, and the measurement of the height H and the diameter D of the specimen 21 can be performed efficiently in a short time. it can. When the diameter D of the specimen 21 is measured at a plurality of positions, the measurement can be performed by changing the position of the side sensor 14 by the lifting drive unit 12.

Further, as described above, in this embodiment, claim 2
In response to the above, since the upper surface side sensor 22 is provided so as to be able to move horizontally, the height H is measured at an arbitrary position on the upper surface 21B of the specimen 21 by horizontally moving the upper surface side sensor 22, Measurement of flatness and the like can be performed. The specimen
If 21 is turned over and set on the rotary table 2, the bottom 21A
Height H and flatness can be measured.

Furthermore, in the present embodiment, the rotary table 2 is rotated by using the concrete specimen measuring apparatus according to the first aspect of the present invention. This is a measuring method in which the side sensor 14 is moved up and down by 12 and the distance to the side 21C of the concrete specimen 21 is measured by the side sensor 14, so that the rotary table 2 is rotated and the side sensor 14 is moved. Specimen by measuring while moving up and down
The side surface 21C of 21 was continuously measured almost spirally, and the specimen was
The shape of the side surface 21C of 21 can be measured three-dimensionally.

Also, as an effect of the embodiment, the control device 31 calculates the angle Kc of the specimen 21 with respect to the turntable 2 based on the measured value of the side sensor 14, so that the turntable 2 is rotated. Then, measurement is performed by the side sensor 14 while moving the side sensor 14 up and down, and the angle Kc of the specimen 21 with respect to the rotary table 2 can be calculated from the measured value. In addition, since the sensors 14 and 22 of this example are of a non-contact type, the specimen 21 does not have a sliding portion.

FIG. 7 shows a second embodiment of the present invention. In this embodiment, the side sensor 14 and the upper sensor 22 are contact sensors, and the side surface 21C and the upper surface 21B of the specimen 21 are respectively provided.
The gauges 14A and 22A slide in contact with the gauges, and the distances are measured and the detection signals are output by changing the gauges 14A and 22A.

As described above, in this embodiment, the rotary table 2 for rotating the concrete specimen 21 in the vertical direction and the rotary position detecting means for detecting the rotary position of the rotary table 2 correspond to the first aspect. An encoder 7, an upper sensor 22 disposed above the turntable 2 for measuring the distance to the upper surface 21 </ b> B of the concrete specimen 21, and an upper sensor 22 disposed at the side of the concrete specimen 21 placed on the turntable 2. A side sensor 14 for measuring the distance to the side surface 21C of the concrete specimen 21, an elevation drive unit 12 as an elevation drive unit for vertically moving the side sensor 14, and a height position of the side sensor 15 are detected. The height H of the concrete specimen 21 is calculated based on the measured values of the encoder 15 serving as a height position detecting means and the upper surface side sensor 22, and the side surface side sensor is used.
Calculating means 33 for calculating the diameter D of the concrete specimen 21 from the measured values of 14; and the upper surface side sensor 22 is provided so as to be horizontally movable,
According to the second embodiment, the same operation and effect as those of the first embodiment can be obtained, and the measuring method of claim 3 can be performed.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, as the rotation position detection means, various types can be used as long as it detects the rotation position of the rotary table, and the height position detection means is:
As long as it detects the height position of the side sensor, various types can be used. Further, various sensors can be used as long as they can measure the distance.

[0026]

According to the first aspect of the present invention, there is provided a rotary table for rotating a concrete specimen vertically and rotationally detecting the rotary position of the rotary table, and is disposed above the rotary table. An upper surface sensor for measuring the distance to the upper surface of the concrete specimen, and a side sensor disposed on the side of the concrete specimen placed on the rotary table and measuring the distance to the side surface of the concrete specimen, Elevating drive means for moving the side sensor up and down, height position detecting means for detecting the height position of the side sensor, and calculating the height of the concrete specimen from the measured value of the upper sensor. And calculating means for calculating the diameter of the concrete specimen based on the measurement value of the side surface sensor, and efficiently increasing the dimensions of the specimen. It is possible to provide a measuring device of the concrete specimen which can be constant.

[0027] The invention of claim 2 provides the concrete specimen measuring apparatus in which the upper surface side non-contact sensor is provided so as to be horizontally movable, so that the dimensions of the specimen can be measured efficiently. be able to.

According to a third aspect of the present invention, there is provided a concrete specimen measuring apparatus according to the first aspect, wherein the rotary table is rotated, and the side-side sensor is moved up and down by the elevation drive means. This is a measuring method for measuring a distance to a side surface of a concrete specimen by a side sensor, and can provide a measuring method of a concrete specimen that can efficiently measure a dimension of the specimen.

[Brief description of the drawings]

FIG. 1 is a side view of a measuring apparatus main body showing a first embodiment of the present invention.

FIG. 2 is a block diagram of an apparatus showing a first embodiment of the present invention.

FIG. 3 is a front view of the control device showing the first embodiment of the present invention.

FIG. 4 is a plan view of a specimen showing the first embodiment of the present invention.

FIG. 5 is a side view of a specimen showing the first embodiment of the present invention.

FIG. 6 is a perspective view of a specimen showing the first embodiment of the present invention.

FIG. 7 is a side view of a test piece according to the first embodiment of the present invention.

FIG. 8 is a side view of a measuring apparatus main body according to a second embodiment of the present invention.

[Explanation of symbols]

 2 Rotary table 7 Encoder (rotational position detecting means) 14 Side sensor 21 Concrete specimen 21B Upper surface 21C Side surface 22 Upper surface sensor 33 Calculation means H Height D Diameter

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // G01N 1/28 G01N 1/28 E (72) Inventor Masaaki Ozawa 3-chome Bentenbashi-dori, Niigata City, Niigata Prefecture No. 9 No. 9 Asahi Research Institute F-term (reference) 2F069 AA39 AA42 AA54 BB40 CC05 GG04 GG07 GG09 GG52 GG58 GG62 HH09 HH15 JJ06 JJ07 JJ17 JJ19 MM32 MM34 PP02 QQ10 QQ13 EC02 A0201

Claims (3)

[Claims] 1. A rotary table for rotating a concrete specimen in a vertical direction, a rotation position detecting means for detecting a rotational position of the rotary table, and a rotary table disposed above the rotary table to an upper surface of the concrete specimen. An upper surface sensor for measuring the distance of a concrete sample placed on the rotary table, a side sensor for measuring the distance to the side surface of the concrete sample, and a vertical sensor Elevating drive means for elevating, height position detecting means for detecting the height position of the side sensor, and calculating the height of the concrete specimen from the measured value of the upper sensor, and the height of the side sensor Calculating means for calculating the diameter of the concrete specimen based on the measured value. 2. The measuring device for a concrete specimen according to claim 1, wherein the upper surface side sensor is provided so as to be horizontally movable. 3. The concrete sample measuring device according to claim 1, wherein the rotary table is rotated and the side sensor is moved up and down by the elevation drive means. A measuring method using a measuring device for a concrete specimen, which measures a distance to a side surface of the specimen.