JP2023112750A - Measurement system - Google Patents

Abstract

To provide a measurement system that simply measures arrangement intervals of a measurement object and the like.SOLUTION: A measurement system measures a measurement object. The measurement system has: a measurement device that performs a measurement of the measurement object by controlling moving of an imaging unit in a prescribed direction; and a management terminal that performs a comparison with preliminarily determined reference values, using measurement data measured by the measurement device. The measurement device has: a light source device that is located on a rear surface side of the measurement object, and emits light toward the imaging unit from the rear surface side of the measurement object; and a control unit that controls measurement processing using information on an image taken by the imaging unit, and the management terminal has a comparison unit that compares the measurement data measured by the measurement device with the reference value.SELECTED DRAWING: Figure 1

Description

The present invention relates to a measurement system for simply measuring the size and arrangement intervals of objects to be measured.

For structures, it is required to measure and inspect whether construction is being carried out in accordance with the standards stipulated by law. For example, when constructing a reinforced concrete structure, a bar arrangement inspection is performed to confirm that the reinforcing bars are arranged correctly according to the drawings.

Conventionally, such inspections have often been performed by humans, which is a very time-consuming task. For example, in the case of bar arrangement inspections, workers must use a ruler to measure the distance between the reinforcing bars and take pictures with cameras, which is a time-consuming task. Therefore, as instruments for simplifying this work, there are measuring instruments for measuring the fixing length of reinforcing bars (Patent Document 1), devices using magnets (Patent Document 2), and devices for simply measuring dimensions (Patent Document 3). and so on.

However, although the inspection work efficiency can be improved by using the instruments and devices disclosed in Patent Documents 1 to 3, in the end, it is still necessary for the worker to measure each reinforcing bar.

Therefore, as shown in Patent Documents 4 and 5, there is a system that performs inspection using image analysis.

Japanese Patent Application Laid-Open No. 2007-309896 JP 2016-089358 A JP 2020-112513 A JP 2016-003981 A Japanese Patent Application Laid-Open No. 2020-027058

In Patent Documents 4 and 5, inspection is performed using image analysis, so work efficiency is improved. However, when the object to be measured is captured by a camera, it is easily affected by the external environment, such as light. Further, in order to improve the accuracy, it may be necessary to place a marker and support by an operator.

In addition, inspections such as bar arrangement inspections in the construction of reinforced concrete structures are carried out outdoors. Therefore, when an inspection is performed using image analysis as in Patent Documents 4 and 5, images used for inspection cannot be captured unless there is sufficient brightness. As a result, it can be difficult to capture images with the brightness required for image analysis during construction at night, winter evenings with short daylight hours, and sunny days.

In view of the above problems, the present inventors have invented a measurement system that can reduce the work load of measurement without lowering the measurement accuracy.

A first invention is a measurement system for measuring a measurement object, the measurement system comprising: a measurement device for measuring the measurement object by controlling movement of an imaging unit in a predetermined direction; and a management terminal that compares the measured data with a predetermined reference value, and the measuring device is positioned on the back side of the object to be measured, and is located on the back side of the object to be measured. a light source device that emits light from the side toward the imaging unit; and a control unit that controls measurement processing using image information captured by the imaging unit. and a comparison unit that compares the measured data with the reference value.

By configuring as in the present invention, it is possible to reduce the work load of the measurement, instead of manually performing the work using the measuring instrument. In addition, image information with clear contrast can be captured by imaging the shadow of the object to be measured, which is generated by emitting light from the light source device from the back side of the object to be measured. Therefore, unlike conventional image analysis, it is less likely that external factors will cause a drop in measurement accuracy.

In the above-described invention, the imaging unit captures an image of the shadow of the measurement object where the light emitted from the light source device is blocked by the measurement object, and the control unit controls the image information captured by the imaging unit. It can be configured as a measurement system for measuring the size and/or distance of the measurement object by detecting the edge of the measurement object using the shadow of the measurement object.

By configuring as in the present invention, it is possible to measure the size and interval of the object to be measured.

In the above invention, the control unit calculates the size of the object to be measured using the detected positions of both ends in the image information captured by the imaging device, and calculates the size of the end of the object to be measured. It can be configured as a measurement system that uses the positions and the positions of the edges of adjacent measurement objects to calculate the distance between the measurement objects.

Calculation of the size and spacing of the objects to be measured can be realized by configuring as in the present invention.

A fourth aspect of the invention is a measurement system for measuring an object to be measured, the measurement system comprising: a measuring device for measuring the object to be measured by controlling movement of a light receiving unit in a predetermined direction; and a management terminal that compares the measured data with a predetermined reference value, and the measuring device is positioned on the back side of the object to be measured, and is located on the back side of the object to be measured. a light-emitting device that emits light toward the light-receiving unit from the side; and a control unit that controls measurement processing using the light-receiving state of the light-receiving unit. The measurement system includes a comparison unit that compares measured data with the reference value.

By configuring as in the present invention, it is possible to reduce the work load of the measurement, instead of manually performing the work using the measuring instrument. In addition, since image processing is not required, unlike conventional image analysis, deterioration of measurement accuracy due to external factors is less likely to occur. In addition, since electronic elements can be used, the cost can be reduced.

In the above-described invention, the control unit measures the size and/or interval of the measurement object by detecting the edge of the measurement object based on whether or not the light receiving unit receives light. can be configured as

By configuring as in the present invention, it is possible to measure the size and interval of the object to be measured.

In the above invention, the control unit calculates the size of the object to be measured using the positions of both ends detected by the presence or absence of light reception in the light receiving unit, and calculates the positions of the ends of the object to be measured. , and the positions of the ends of adjacent measurement objects to calculate the distance between the measurement objects.

Calculation of the size and spacing of the objects to be measured can be realized by configuring as in the present invention.

In the above invention, the comparing unit compares the measured data with the reference value, stores information indicating condition satisfaction when a predetermined condition is satisfied, and stores information indicating condition satisfaction when the predetermined condition is not satisfied. It can be configured as a measurement system that stores information indicating unsatisfaction and can display information indicating the satisfaction and/or unsatisfaction of the conditions as inspection results.

When the measurement system of the present invention is used for bar arrangement inspection, etc., it is necessary to record whether the object to be measured satisfies predetermined conditions. Therefore, the recording can be performed by configuring as in the present invention.

The measuring device in the first invention can be realized by configuring as in the present invention. That is, a measuring apparatus for measuring an object to be measured includes a light source device, an imaging unit, and a control unit for controlling measurement processing using image information captured by the imaging unit. The device is positioned on the back side of the object to be measured, and emits light from the back side of the object to be measured toward the imaging unit. by capturing an image of the shadow of the measurement object blocked by the image pickup unit, and detecting the edge of the measurement object using the shadow of the measurement object in the image information captured by the imaging unit, A measuring device for measuring the size and/or spacing of the measurement object.

Even if the measuring device is configured as in the present invention, the same technical effects as those of the first invention can be obtained.

When the measuring device in the first invention is used for bar arrangement inspection, it can be realized by configuring as in the present invention. That is, the measuring apparatus used for bar arrangement inspection includes a light source device, an imaging unit, a moving device that allows the imaging unit to move freely in a predetermined direction, and a driving device that operates the moving device. The measuring device emits light from the back side of the reinforcing bar toward the imaging unit, moves the imaging unit in a predetermined direction by the moving device, and detects the reinforcing bar from the image information captured by the imaging unit. measuring device for measuring the size and/or spacing of the rebars by detecting the ends of the rebars by detecting the shadow of the rebars.

When the measuring device in the first invention is used for bar arrangement inspection, it can be realized by configuring as in the present invention. A measuring device used for bar arrangement inspection, comprising a light source device, an imaging unit, a base, and a holder for supporting the light source device. Each support part is attached with a pulley on which a belt connected to the imaging unit and a guide rail are attached. Then, the imaging unit freely moves between the left and right support portions along the guide rail due to the rotational movement of the belt by the driving device that drives the pulley, and the reinforcing bar is detected from the image information imaged by the imaging unit. measuring device for measuring the size and/or spacing of the rebars by detecting the ends of the rebars by detecting the shadow of the rebars.

By configuring as in these inventions, the same technical effect as the first invention can be obtained when the measuring device is used for bar arrangement inspection.

In the above invention, the light source device can be configured like a measuring device having a housing, a light source, and a diffusion plate.

By providing a diffuser plate as a light source device, it is possible to diffuse the light so that the light can be widely reflected in the image information captured by the imaging device. This makes it easier to detect shadows when the object to be measured causes shadows.

In the above invention, the moving direction of the imaging unit and the longitudinal direction of the light source device can be the same as a measuring device.

By configuring as in the present invention, it is possible to secure a light source according to the moving direction of the imaging unit.

The measuring device in the fourth invention can be realized by configuring as in the present invention. That is, it is a measuring device for measuring an object to be measured, and has a light emitting device, a light receiving unit, and a control section for controlling measurement processing. and emits light from the back side of the object to be measured toward the light receiving unit, the light receiving unit receives the light emitted from the light emitting device, and the control section controls the light emitting device by the light receiving unit. This is a measuring device that measures the size and/or the distance of the object by detecting the edge of the object using the state of light received from the object.

Even if the measuring device is configured as in the present invention, it is possible to obtain the same technical effects as in the fourth invention.

When the measuring device according to the fourth invention is used for bar arrangement inspection, it can be realized by configuring as in the present invention. That is, it is a measuring device used for bar arrangement inspection, and has a light emitting device, a light receiving unit, a moving device that allows the light receiving unit to move freely in a predetermined direction, and a driving device that operates the moving device. The measuring device emits light from the back side of the reinforcing bar toward the light receiving unit, moves the light receiving unit in a predetermined direction by the moving device, and receives the light from the light emitting device with the light receiving unit. A measuring device for detecting the ends of the reinforcing bars by using light receiving conditions to measure the size and/or spacing of the reinforcing bars.

When the measuring device according to the fourth aspect of the invention is used for bar arrangement inspection, it can be realized by configuring it as in the present invention. A measuring device used for bar arrangement inspection, comprising a light emitting device, a light receiving unit, a base, and a holder for supporting the light emitting device, and supporting portions near both left and right ends of the base. Each support part is attached with a pulley on which a belt connected to the light receiving unit is hung, and a guide rail. Then, the belt is rotated by a driving device that drives the pulley, so that the light receiving unit moves freely between the left and right support portions along the guide rail, and the light from the light emitting device is received by the light receiving unit. A measuring device for detecting the ends of the reinforcing bars by using light receiving conditions to measure the size and/or spacing of the reinforcing bars.

By configuring as in these inventions, the same technical effects as in the fourth invention can be obtained when the measuring device is used for bar arrangement inspection.

In the above invention, the holder can be configured like a measuring device having a fixing member for fixing the measuring device to the reinforcing bar.

The measuring device should be fixed by a holder.

In the above-described invention, a part of the holder forms a plurality of arms, and can be configured like a measuring device in which the fixing member is provided between the arms.

By configuring as in the present invention, an object to be measured, such as a reinforcing bar, can be positioned between the imaging unit and the light source device.

By using the measurement system of the present invention, it is possible to reduce the workload required for measurement without lowering measurement accuracy.

It is a figure showing typically an example of the whole composition of the measuring system of the present invention. It is a figure which shows typically an example of the hardware constitutions of the computer used with the measuring system of this invention. 4 is a flow chart showing an example of a processing process in the measurement system of the present invention; 1 is a perspective view of the front side of a measuring device for measuring a reinforcing bar, which is an example of an object to be measured; FIG. It is a perspective view of the back side of a measuring device in the case of measuring a reinforcing bar which is an example of a measuring object. 1 is a front view of an example of a measuring device for measuring a reinforcing bar, which is an example of an object to be measured; FIG. FIG. 2 is a rear view of an example of a measuring device for measuring a reinforcing bar, which is an example of an object to be measured; 1 is a plan view of an example of a measuring device for measuring a reinforcing bar, which is an example of an object to be measured; FIG. It is a bottom view of an example of a measuring device for measuring a reinforcing bar, which is an example of an object to be measured. FIG. 2 is a right side view of an example of a measuring device for measuring a reinforcing bar, which is an example of an object to be measured; FIG. 2 is a left side view of an example of a measuring device for measuring a reinforcing bar, which is an example of an object to be measured; 1 is a front perspective view of an example measuring device; FIG. It is a perspective view of the back side of an example measuring device. It is an enlarged view from the front side near the imaging unit in an example of the measuring device. It is an enlarged view from the back side near the imaging unit in an example of the measuring device. FIG. 4 is a cross-sectional view from the side near the imaging unit in the example measuring device. It is an enlarged view from the left end side in the measuring device of one example. It is a figure which shows the light source device of the state which removed the diffusion plate. It is a perspective view from the lower back side of the measuring device when measuring a reinforcing bar, which is an example of the object to be measured. FIG. 2 is a diagram schematically showing a conceptual diagram when conducting a bar arrangement inspection using the measurement system of the present invention; FIG. 4 is a diagram schematically showing measurement processing of an object to be measured by an imaging unit; FIG. 10 is a diagram showing an example of image information before the shadow of the reinforcing bar, which is the object to be measured, reaches a predetermined position in the image information; FIG. 10 is a diagram showing an example of image information in a state where a shadow of a reinforcing bar, which is an object to be measured, reaches a predetermined position in the image information; FIG. 10 is a diagram showing an example of image information in a state in which the imaging unit is moving in the forward direction after detecting the end of the reinforcing bar that is the object to be measured; FIG. 10 is a diagram showing an example of image information in a state where the shadow of the reinforcing bar, which is the object to be measured, is removed and the diameter of the reinforcing bar, which is the object to be measured, is detected. It is a figure which shows typically the process of a comparison part. FIG. 4 is a diagram schematically showing another example of the overall configuration of the measurement system of the present invention;

An example of the overall system configuration of the measurement system 1 of the present invention is shown in FIG. 1, and an example of the hardware configuration of the computer used in the measurement system 1 is shown in FIG.

A measurement system 1 has a measurement device 2 and a management terminal 3 . The measuring device 2 is a device that measures an object to be measured, and the management terminal 3 is a computer that uses the results (measurement data) measured by the measuring device 2 to compare whether predetermined conditions are satisfied. Data can be transmitted and received between the measuring device 2 and the management terminal 3 by wire or wirelessly.

The computer includes an arithmetic unit 70 such as a CPU for executing arithmetic processing of a program, a storage device 71 such as a RAM or hard disk for storing information, a display device 72 such as a display, an input device 73 for inputting information, and a communication device 74 for communicating the processing result of the arithmetic device 70 and the information stored in the storage device 71 . If the computer has a touch panel display, the display device 72 and the input device 73 may be integrated. Touch panel displays are often used in portable communication terminals such as tablet computers and smartphones, but are not limited to these.

The touch panel display is a device in which the functions of the display device 72 and the input device 73 are integrated in that input can be performed directly on the display using a predetermined input device (such as a pen for touch panel) or a finger.

Note that the measurement device 2 also includes at least an arithmetic device 70 , a storage device 71 and a communication device 74 , and may also include a display device 72 and an input device 73 .

Also, the management terminal 3 may be implemented by a single computer, but may be implemented by a plurality of computers for some or all of its functions. The computer in this case may be, for example, a cloud server.

Each means in the measurement system 1 of the present invention is only logically distinguished in its function, and may physically or practically form the same area.

The measurement device 2 in the measurement system 1 has a light source device 20 , an imaging unit 21 , a control section 22 , a storage section 23 and a communication section 24 .

The light source device 20 is installed on the back side of the object to be measured, and is a device that irradiates the imaging unit 21 with light from the back of the object to be measured. The light source device 20 preferably has a shape parallel to the arrangement direction of the object to be measured. For example, if the object to be measured is a reinforcing bar and the size and spacing of the reinforcing bars are to be measured, the longitudinal direction of the light source device 20 is preferably the direction in which the reinforcing bars are arranged. Further, the light source device 20 is preferably a flat light source. The configuration of the light source device 20 will be described later.

The imaging unit 21 is a unit that includes an imaging device 210, and moves the imaging device 210 to capture an image of the shadow of the object to be measured. An object to be measured is positioned between the imaging device 210 and the light source device 20 . The measuring device 2 moves the imaging unit 21 to capture an image of the shadow of the object to be measured, thereby measuring the size of the object to be measured and the interval between the objects to be measured. A measuring method using an example of a specific configuration of the measuring device 2 will be described later.

The image pickup device 210 of the image pickup unit 21 may be any device provided with an image pickup element, such as a camera. The imaging device 210 is supported by a support member and moves along guide rails 42 installed on a base 40 of the measuring device 2, which will be described later.

The control unit 22 controls the measuring device 2 . Specifically, in addition to controlling the on/off control of light irradiation from the light source device 20 and controlling the movement of the imaging unit 21, the shadow of the object to be measured is detected from the image information captured by the imaging device 210. , the size of the object to be measured and the arrangement interval of the object to be measured are measured.

The storage unit 23 stores data (measurement data) measured by the control unit 22 . The storage unit 23 functions as a storage device 71 .

The communication unit 24 performs wired or wireless communication with the management terminal 3 . The communication unit 24 functions as a communication device 74 .

A management terminal 3 in the measurement system 1 has a communication section 30 , a storage section 31 and a comparison section 32 .

The communication unit 30 performs wired or wireless communication with the measuring device 2 . The communication unit 30 functions as a communication device 74 .

The storage unit 31 stores data to be compared with the measured data measured by the measuring device 2, such as the original data of the object to be measured, such as bar arrangement diagrams. The storage unit 31 functions as a storage device 71 .

The comparison unit 32 compares the measurement data of the measurement object measured by the measurement device 2 with the data to be compared (comparison target data) stored in the storage unit 31, and determines whether a predetermined condition is satisfied. .

Next, an example of a specific configuration of the measuring device 2 will be described with reference to FIGS. 4 to 19. FIG. FIG. 4 is a perspective view of the front side of the measuring device 2 when measuring a reinforcing bar, which is an example of the object to be measured. FIG. 5 is a perspective view of the back side of the measuring device 2 when measuring a reinforcing bar, which is an example of the object to be measured. FIG. 6 is a front view of an example measuring device 2 for measuring a reinforcing bar, which is an example of an object to be measured. FIG. 7 is a rear view of the measuring device 2 as an example when measuring a reinforcing bar, which is an example of the object to be measured. FIG. 8 is a plan view of an example measuring device 2 for measuring a reinforcing bar, which is an example of the object to be measured. FIG. 9 is a bottom view of an example measuring device 2 for measuring a reinforcing bar, which is an example of an object to be measured. FIG. 10 is a right side view of an example measuring device 2 for measuring a reinforcing bar, which is an example of the object to be measured. FIG. 11 is a left side view of an example measuring device 2 for measuring a reinforcing bar, which is an example of an object to be measured. FIG. 12 is a perspective view of the front side of the measuring device 2 of one example. FIG. 13 is a perspective view of the rear side of the measuring device 2 as an example. FIG. 14 is an enlarged view from the front side near the imaging unit 21 in the measuring device 2 of one example. FIG. 15 is an enlarged view from the rear side near the imaging unit 21 in the measuring device 2 of one example. FIG. 16 is a cross-sectional view of the vicinity of the imaging unit 21 in the measuring device 2 of one example, viewed from the side. FIG. 17 is an enlarged view from the left end side of the measuring device 2 of one example. FIG. 18 shows the light source device 20 with the diffusion plate 202 removed. FIG. 19 is a perspective view from below the rear side of the measuring device 2 when measuring a reinforcing bar, which is an example of the object to be measured.

Note that the measurement device 2 described below is an example, and an imaging unit 21 is moved in the horizontal direction by light from a light source device 20 positioned behind the object to be measured to image the shadow of the object to be measured. Any configuration may be used as long as the size and arrangement interval of the measurement object can be measured by imaging with the device 210 .

The measurement device 2 has a light source device 20 , an imaging unit 21 , a base 40 , and a holder 45 that supports the light source device 20 .

Plates 41a and 41b (supporting portions) are installed vertically near the left and right ends of the base 40. The plates 41a and 41b guide the lateral movement of the imaging unit 21, which will be described later. A guide rail 42 is installed for this purpose. An L-shaped holder 45 is attached to the bottom surface of the base 40 . One end of the L-shape is joined to the base 40 and the other end is joined to the rear side of the light source device 20 .

A part of the holder 45 is bifurcated, and an object to be measured, for example, a reinforcing bar R can be positioned between the bifurcated arms 451a and 451b. A fixing member 452 is provided between the arms 451a and 451b of the holder 45 for fixing the measuring device 2 to the object to be measured. The fixing member 452 may be, for example, a magnet, or may be a member for fixing by sandwiching a reinforcing bar.

Also, a leg (not shown) may be provided on the bottom surface of the holder 45 so that the measuring device 2 is supported by the leg.

Pulleys 43a and 43b are installed on the plates 41a and 41b, respectively, and a belt 44 is put around the pulleys 43a and 43b. The belt 44 is fixed to the imaging unit 21 and rotated by the pulley 43 to allow the imaging unit 21 to move in the horizontal direction.

A driving device 46 such as a motor is attached to the plate 41a to rotate the pulley 43a. As the driving device 46, for example, a stepping motor can be used, and the movement distance of the belt 44 moved by the rotation of the pulley 43a, that is, the image pickup unit 21 attached to the belt 44, is determined by the rotation angle (and number of rotations) and the rotation speed. A moving distance can be specified. A rotary encoder or the like can be used as the driving device 46 instead of the stepping motor. As the driving device 46, any device other than a stepping motor and a rotary encoder may be used as long as it can rotate the pulley 43 and specify the moving distance of the imaging device 210. FIG.

The imaging unit 21 has an imaging device 210 , a flange 211 , a belt fixing plate 212 , spacers 213 and studs 214 . The imaging device 210 is connected to the flange 211 through the spacer 213 , and the flange 211 is connected to the belt fixing plate 212 through the stud 214 . Further, the belt fixing plate 212 is connected to the belt 44, and the movement of the belt 44 causes the imaging unit 21 to move.

A guide rail 42 is positioned in the gap between the flange 211 and the belt fixing plate 212, and a linear guide 215 provided on the rear surface of the flange 211 is fitted into the groove of the guide rail 42 and moves along the groove. As a result, the imaging unit 21 can move in the left-right direction along the guide rails 42 . The linear guide 215 and the guide rail 42 constitute a guide portion of the imaging unit 21 .

The light source device 20 has a housing 200 , a light source 201 and a diffusion plate 202 . FIG. 18 is a diagram showing a state in which the diffusion plate 202 is removed from the light source device 20. FIG.

For the light source 201, for example, a flat LED or the like can be used, but a point light source or the like may also be used. Also, any device that emits light may be used without being limited to LEDs.

The housing 200 has a concave shape and accommodates the light source 201 inside. One side of the housing 200 is open, and a diffusion plate 202 is attached to the opening. A light source 201 emits light through an opening and a diffusion plate 202 . The housing 200 is joined to the holder 45 and the housing 200 is supported by the holder 45 . The housing 200 is joined to the holder 45 so that the surface of the housing 200 to which the diffusion plate 202 is attached faces the imaging unit 21 . As a result, the light emitted from the light source 201 is diffused by the diffusion plate 202, and the imaging device 210 of the imaging unit 21 can image the shadow of the object to be measured.

The diffuser plate 202 is a diffuser that diffuses the light emitted from the light source 201 . Preferably, the light is diffused circularly so that the light is uniform. Note that the expression diffusing plate 202 also includes a diffusing sheet that achieves the same technical effect.

By configuring as described above, the measuring device 2 used in the measuring system 1 of the present invention can be configured. In the above description and drawings, members such as a power supply, wiring, and screws are omitted for simplification. Also, each member may be made of any material such as metal, plastic, or resin as long as it is suitable for the purpose of each member. Moreover, each member is joined by an appropriate method.

Next, a case of measuring an object to be measured using the measuring system 1 of the present invention will be described. It should be noted that in the following explanation, the present invention is used for the bar arrangement inspection for inspecting the diameter (length (size)) r of the reinforcing bar R arranged in the concrete structure (the length (size) in the moving direction of the measuring unit), the bar arrangement interval L, etc. A case of using the measurement system 1 of . In this case, the objects to be measured are the diameter r of the reinforcing bars R and the interval L between them.

FIG. 20 shows a conceptual diagram of a bar arrangement inspection using the measurement system 1 of the present invention. Since a plurality of reinforcing bars R are arranged in a straight line with respect to the structure, the measuring device 2 in the measuring system 1 is installed in parallel facing the reinforcing bars R to be measured (S100). At this time, the measuring device 2 is installed by fixing the holder 45 of the measuring device 2 to the reinforcing bar. Then, the measuring device 2 is activated by pressing a power switch (not shown) (S110).

When the measurement device 2 is activated, the imaging unit 21 is positioned at an initial position, for example, next to the left plate 41a or next to the right plate 41b, either near the left or right end of the guide rail 42. FIG. The initial position may be anywhere between the left plate 41a and the right plate 41b.

The light source 201 of the light source device 20 emits light, which is diffused by the diffusion plate 202 and travels from the light source device 20 to the imaging unit 21 . The imaging device 210 images the direction of the reinforcing bar R, which is the object to be measured. When the light emitted from the light source device 20 hits the reinforcing bar R, which is the object to be measured, that portion becomes a shadow, and the imaging device 210 images the reinforcing bar R, which is the object to be measured, as a shadow.

The imaging unit 21 starts moving until it reaches the final position (S120, S130). That is, the control unit 22 of the measuring device 2 controls the rotation of the stepping motor of the driving device 46 to rotate the pulley 43a and the belt 44 starts to move in the forward direction. Accordingly, the imaging unit 21 fixed to the belt 44 also starts moving forward from the initial position. As the belt 44 moves, the pulleys 43a and 43b also rotate, so the number of rotations of the pulleys 43a and 43b is measured by the stepping motor, and the controller 22 measures the amount of movement of the imaging unit 21 from the initial position.

Then, the control unit 22 detects whether the shadow of the reinforcing bar R, which is the object to be measured, appears in the image information captured by the imaging device 210 of the imaging unit 21 and reaches a predetermined position in the image information. Then, the object to be measured is measured (S140).

FIG. 21 schematically shows the measurement processing of the measurement object by the imaging unit 21. In FIG. FIG. 22 shows an example of image information before the shadow of the reinforcing bar R, which is the object to be measured, reaches a predetermined position (rectangular area in the image information in FIG. 22) in the image information.

That is, when the control unit 22 detects that the shadow of the reinforcing bar R, which is the object to be measured, appears at a predetermined position in the image information captured by the imaging device 210, the end of the reinforcing bar R, which is the object to be measured, is detected. It is determined that it has been detected, and the movement amount d1 from the initial position d0 of the imaging device 210 is recorded. FIG. 23 shows an example of image information when the shadow of the reinforcing bar R, which is the object to be measured, reaches a predetermined position in the image information.

Then, the control unit 22 moves the imaging unit 21 in the forward direction as it is, and when it detects that the shadow of the reinforcing bar R, which is the object to be measured, disappears from the predetermined position of the image information imaged by the imaging device 210, the object to be measured. It is determined that the other end of the reinforcing bar R, which is an object, has been detected, and similarly, the movement amount d2 from the initial position of the measuring unit 20 is recorded. The difference between the movement amount d2 and the movement amount d1 is the diameter r of the reinforcing bar R. For example, the diameter r1 of the reinforcing bar R1 is
r1=|d2-d1|
can be calculated by FIG. 24 is a diagram showing an example of image information in a state where the imaging unit 21 is moving in the forward direction after detecting the end of the reinforcing bar R, which is the object to be measured. FIG. 25 shows an example of image information in a state where the shadow of the reinforcing bar R, which is the object to be measured, has disappeared and the diameter r of the reinforcing bar R, which is the object to be measured, has been detected. The display of "11.72003 mm" displayed in FIG. 25 is the diameter of the reinforcing bar R measured.

Also, the difference between the amount of movement d2 of the right end of the immediately preceding reinforcing bar (for example, reinforcing bar R1) and the amount of movement d3 of the left end of the reinforcing bar adjacent in the forward direction (for example, reinforcing bar R2) is the arrangement interval L of the reinforcing bar R. becomes. For example, the arrangement interval L1 between the reinforcing bar R2 and the reinforcing bar R1 is
L1=|d3-d2|
can be calculated by

The control unit 22 causes the storage unit 23 to store the calculated diameter r and the arrangement interval L of the reinforcing bars R.

It should be noted that the detection that the shadow of the object to be measured is captured at a predetermined position in the image information is performed by displaying a predetermined color, for example black, on the moving direction side of the imaging unit 21 in the predetermined area set in the image information. It can be determined that the shadow of the object to be measured is captured when the size is larger than a predetermined size. Further, the detection that the shadow of the object to be measured disappears from a predetermined position in the image information is performed by, in a predetermined area set in the image information, the side of the area opposite to the moving direction of the imaging unit 21 having a predetermined color, for example, white. , it can be determined that the shadow of the object to be measured has disappeared. Judgment whether the shadow of the object to be measured is reflected or not is not limited to the above. , it may be judged that the shadow of the object to be measured appears or disappears.

As described above, the control unit 22 repeats the measurement while controlling the movement of the imaging unit 21 in the forward direction, and moves it until it reaches the final position.

Then, when the imaging unit 21 reaches the final position (S120), the control unit 22 sends the measurement data of the reinforcing bar diameter r and the arrangement interval L stored in the storage unit 23 to the management terminal 3 via the communication unit 24. Send (S150).

In the management terminal 3, when the measurement data is received from the measuring device 2 via the communication unit 30, the comparison unit 32 refers to the reinforcement arrangement diagram data stored in the storage unit 31, and determines the diameter of the reinforcing bar in the reinforcement arrangement diagram data. and the value of the arrangement interval, and the diameter r and the arrangement interval L of the reinforcing bars in the measured data are compared to determine whether or not the predetermined conditions are satisfied. FIG. 26 schematically shows the processing of the comparison unit 32. As shown in FIG.

FIG. 26(a) is a comparison of the diameters of the reinforcing bars, and FIG. 26(b) is a diagram schematically showing a comparison of the distances between the reinforcing bars. The storage unit 31 stores the design value of the diameter of the reinforcing bar and the design value of the distance between the reinforcing bars in association with each identification information (for example, the identification information of the reinforcing bars and the identification information of the distance between the reinforcing bars). The measured value of the diameter r of the reinforcing bar and the measured value of the spacing L of the reinforcing bar corresponding to the measurement data are compared. Then, the comparison unit 32 outputs information indicating that there is no problem when the diameter of the corresponding reinforcing bar and the spacing between the reinforcing bars satisfy the predetermined allowable condition, and information indicating that there is a problem when the predetermined allowable condition is not satisfied. This is stored in the storage unit 31 in association with the diameter and the arrangement interval of the reinforcing bars.

By executing such processing, it is possible to execute a bar arrangement inspection.

Note that the measurement data may include image information captured by the imaging device 210 in addition to the measured values. This makes it possible to record the inspection status as image information.

When the measurement by the measuring device 2 is finished, the power is turned off by pressing the power switch again.

The processing in the management terminal 3 may be integrally provided in the measuring device 2 . In addition, data to be compared with measurement data measured by the measuring device 2, such as the original data of the object to be measured, such as bar arrangement diagrams, is transmitted from the management terminal 3 to the measuring device 2 via the communication unit 30 and the communication unit 30. 24 and stored in the storage unit 23 . In this case, the comparison unit 32 may be provided in the measurement device 2 to compare the data measured by the imaging unit 21 with the data to be compared stored in the storage unit 23 by the control unit 22 . Then, the comparison result may be sent to the management terminal 3 via the communication section 24 and the communication section 30 and displayed.

Note that the imaging device 210 and the light source device 20 in the imaging unit 21 may be replaced by photosensors. In this case, a light emitting device 25 is used instead of the light source device 20 and a light receiving unit 26 is provided instead of the imaging unit 21 . The light emitting device 25 preferably emits light other than visible light, and for example an infrared light emitting diode can be used. The light receiving unit 26 is provided with a photoelectric element (photo IC) as a light receiving device. Other configurations of the light-receiving unit 26 may be the same as those of the imaging unit 21 described above, as long as the light-receiving device can be moved along the guide rails 42 . An example of the configuration of the measurement system 1 in this case is shown in FIG.

In the first embodiment, the imaging device 210 of the imaging unit 21 captures the shadow of the object to be measured by the light emitted by the light source device 20 to detect the edge of the object to be measured. The edge of the object to be measured is detected by detecting when the light receiving device cannot receive light (the state of being blocked by the object to be measured).

That is, as in the first embodiment, the measuring device 2 is activated, and the light emitting device 25 installed on the back side of the object to be measured starts emitting light. As a result, light is emitted from the light emitting device 25 toward the light receiving device side of the light receiving unit 26 .

Then, the light receiving unit 26 is moved from the initial position along the guide rail 42 by the control section 22 , and the light receiving device of the light receiving unit 26 receives light from the light emitting device 25 . When the light-receiving unit 26 reaches the position of the object to be measured, the light from the light-emitting device 25 is blocked by the object to be measured, so the light-receiving device of the light-receiving unit 26 cannot receive the light. Therefore, the position where the light receiving device of the light receiving unit 26 cannot receive the light from the light emitting device 25 is detected as the edge of the object to be measured.

After the light receiving device of the light receiving unit 26 can no longer receive the light from the light emitting device 25, the position where the light receiving device of the light receiving unit 26 next receives the light from the light emitting device 25 is the other end of the object to be measured. detected as part.

By repeating the above processing, the object to be measured is measured in the same manner as in the first embodiment.

It should be noted that the measurement system 1 of the second embodiment can use the same configuration and processing as those of the first embodiment, except for the above mentioned.

The configuration and processing in the measuring system 1 of the present invention can be appropriately modified within the scope of the technical idea of the present invention, and are not limited to the embodiments described herein.

By using the measurement system 1 of the present invention, it is possible to reduce the workload required for measurement without lowering measurement accuracy.

1: measurement system 2: measurement device 3: management terminal 20: light source device 21: imaging unit 22: control unit 23: storage unit 24: communication unit 25: light emitting device 26: light receiving unit 30: communication unit 31: storage unit 32: Comparison unit 40: bases 41a, 41b: plate 42: guide rails 43a, 43b: pulley 44: belt 45: holder 46: drive device 70: arithmetic device 71: storage device 72: display device 73: input device 74: communication device 200 : Housing 201: Light source 202: Diffusion plate 210: Imaging device 211: Flange 212: Belt fixing plate 213: Spacer 214: Stud 215: Linear guides 451a, 451b: Arm 452: Fixing member

Claims (17)

A measurement system for measuring a measurement object,
The measurement system is
A measuring device that measures the measurement object by controlling the movement of the imaging unit in a predetermined direction, and a management terminal that compares the measurement data measured by the measuring device with a predetermined reference value. has
The measuring device is
a light source device positioned on the back side of the measurement object and emitting light from the back side of the measurement object toward the imaging unit;
a control unit that controls measurement processing using image information captured by the imaging unit;
The management terminal is
a comparison unit that compares the measured data measured by the measuring device with the reference value;
A measuring system characterized by: The imaging unit is
capturing an image of the shadow of the measurement object where the light emitted from the light source device is blocked by the measurement object;
The control unit
measuring the size and/or interval of the measurement object by detecting the edge of the measurement object using the shadow of the measurement object in the image information captured by the imaging unit;
The measuring system according to claim 1, characterized in that: The control unit
calculating the size of the object to be measured using the detected positions of both ends in the image information captured by the imaging device;
calculating the interval between the measurement objects using the position of the end of the measurement object and the position of the end of the adjacent measurement object;
3. The measurement system according to claim 2, characterized in that: A measurement system for measuring a measurement object,
The measurement system is
A measuring device that measures the object to be measured by controlling the movement of the light receiving unit in a predetermined direction, and a management terminal that compares the measurement data measured by the measuring device with a predetermined reference value. has
The measuring device is
a light emitting device positioned on the back side of the measurement object and emitting light from the back side of the measurement object toward the light receiving unit;
a control unit that controls measurement processing using the light receiving state of the light receiving unit;
The management terminal is
a comparison unit that compares the measured data measured by the measuring device with the reference value;
A measuring system characterized by: The control unit
measuring the size and/or interval of the measurement object by detecting the edge of the measurement object based on whether or not the light receiving unit receives light;
5. The measuring system according to claim 4, characterized in that: The control unit
calculating the size of the object to be measured using the positions of both ends detected by the presence or absence of light reception in the light receiving unit;
calculating the interval between the measurement objects using the position of the end of the measurement object and the position of the end of the adjacent measurement object;
6. The measurement system according to claim 5, characterized in that: The comparison unit is
comparing the measured data with the reference value, storing information indicating condition satisfaction when a predetermined condition is satisfied, and storing information indicating condition unsatisfaction when the predetermined condition is not satisfied;
Information indicating the satisfaction and/or non-satisfaction of the condition can be displayed as an inspection result;
7. The measurement system according to any one of claims 1 to 6, characterized in that: A measuring device for measuring an object to be measured,
a light source device, an imaging unit, and a control unit that controls measurement processing using image information captured by the imaging unit;
The light source device
located on the back side of the object to be measured, emitting light from the back side of the object to be measured toward the imaging unit;
The imaging unit is
capturing an image of the shadow of the measurement object where the light emitted from the light source device is blocked by the measurement object;
The control unit
measuring the size and/or interval of the measurement object by detecting the edge of the measurement object using the shadow of the measurement object in the image information captured by the imaging unit;
A measuring device characterized by: A measuring device used in bar arrangement inspection,
a light source device;
an imaging unit;
a moving device that allows the imaging unit to move freely in a predetermined direction;
a driving device for operating the moving device;
The measuring device is
Emitting light from the back side of the reinforcing bar toward the imaging unit,
moving the imaging unit in a predetermined direction by the moving device;
Detecting the shadow of the reinforcing bar from the image information captured by the imaging unit to detect the end of the reinforcing bar and measuring the size and/or interval of the reinforcing bar;
A measuring device characterized by: A measuring device used in bar arrangement inspection,
a light source device, an imaging unit, a base, and a holder for supporting the light source device;
Supporting portions are provided near both left and right ends of the base,
Each support is
A pulley on which a belt connected to the imaging unit is hung and a guide rail are attached,
The measuring device is
The light source device emits light from the back side of the reinforcing bar,
The imaging unit is freely moved between the left and right support portions along the guide rail by rotational movement of the belt by a driving device that drives the pulley,
Detecting the shadow of the reinforcing bar from the image information captured by the imaging unit to detect the end of the reinforcing bar and measuring the size and/or interval of the reinforcing bar;
A measuring device characterized by: The light source device
having a housing, a light source, and a diffusion plate,
11. The measuring device according to any one of claims 8 to 10, characterized in that: The moving direction of the imaging unit and the longitudinal direction of the light source device are the same,
12. The measuring device according to any one of claims 8 to 11, characterized in that: A measuring device for measuring an object to be measured,
It has a light emitting device, a light receiving unit, and a control section for controlling measurement processing,
The light emitting device is
positioned on the back side of the object to be measured, emitting light from the back side of the object to be measured toward the light receiving unit;
The light receiving unit is
receiving light emitted from the light emitting device;
The control unit
measuring the size and/or interval of the measurement object by detecting the edge of the measurement object using the light reception state of the light from the light emitting device by the light receiving unit;
A measuring device characterized by: A measuring device used in bar arrangement inspection,
a light emitting device;
a light receiving unit;
a moving device that allows the light receiving unit to move freely in a predetermined direction;
a driving device for operating the moving device;
The measuring device is
Light is emitted from the back side of the reinforcing bar toward the light receiving unit,
moving the light receiving unit in a predetermined direction by the moving device;
measuring the size and/or spacing of the reinforcing bars by detecting the ends of the reinforcing bars by using the receiving state of the light from the light emitting device in the light receiving unit;
A measuring device characterized by: A measuring device used in bar arrangement inspection,
a light-emitting device, a light-receiving unit, a base, and a holder for supporting the light-emitting device;
Supporting portions are provided near both left and right ends of the base,
Each support is
A pulley on which a belt connected to the light receiving unit is hung and a guide rail are attached,
The measuring device is
The light emitting device emits light from the back side of the reinforcing bar,
The belt is rotated by a driving device that drives pulleys, so that the light receiving unit freely moves between the left and right support portions along the guide rail,
measuring the size and/or spacing of the reinforcing bars by detecting the ends of the reinforcing bars by using the receiving state of the light from the light emitting device in the light receiving unit;
A measuring device characterized by: The holder is
a fixing member for fixing the measuring device to the rebar;
16. The measuring device according to any one of claims 10 to 12 and 15, characterized in that: a portion of the holder forms a plurality of arms,
providing the fixing member between the arms;
17. The measuring device according to claim 16, characterized in that:

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