JP6782640B2 - Inspection equipment and inspection method - Google Patents

Description

The present invention relates to an inspection device and an inspection method for receiving and inspecting concrete.

Various methods have been conventionally known for acceptance inspection of concrete. Japanese Unexamined Patent Publication No. 2012-68194 describes a method for measuring a unit water amount of fresh concrete in a mixer truck. The mixer truck is equipped with a kneading drum for accommodating fresh concrete. In this unit water amount measuring method, a rod-shaped measuring pipe and a moisture meter inserted into the measuring pipe are used. By inserting the measuring pipe into which the moisture meter is inserted diagonally into the drum inlet of the kneading drum along the rotation direction of the kneading drum, the moisture meter measures the moisture content of the fresh concrete.

Japanese Unexamined Patent Publication No. 2012-68194

In the unit water content measuring method described above, the water content of fresh concrete is measured by inserting a rod-shaped measuring pipe into a kneading drum of a mixer truck or an agitator truck. However, in this unit water amount measuring method, for example, when inspecting fresh concrete on a plurality of mixer trucks or agitator trucks, it is necessary to prepare measuring equipment such as a measuring pipe for each of the trucks. In addition, measuring equipment such as measuring pipes must be inserted into each of all cars. Therefore, since it is necessary to insert a measuring device into each of all the vehicles, the inspection is complicated and the cost of the inspection increases. Thus, at present, about once against the concrete of 150m ^3, or not be only about the inspection once in the morning or the afternoon, there is a concrete of the acceptance inspection problem that not be enough. Therefore, there is a concern that concrete of poor quality cannot be excluded.

The present invention has been made in view of the above-mentioned problems, and provides a concrete inspection device and an inspection method capable of easily and sufficiently performing acceptance inspection of concrete and surely eliminating concrete of poor quality. The purpose is to provide.

The inspection device according to the present invention is an inspection device for receiving and inspecting concrete, and is a container that accepts concrete, a stirring member that stirs the concrete contained in the container, and is attached to the inside of the container to distort the concrete. Strain measuring means to measure, height detecting means to detect the height of concrete inside the container, mass measuring means to measure the mass of concrete inside the container, and vibration to the concrete inside the container by a vibrator. It is provided with a time measuring means for measuring the time until the height of the concrete converges .

This inspection device includes a container for receiving concrete and a stirring member for stirring the concrete contained in the container. Therefore, concrete can be poured into a container from a mixer truck or an agitator truck, and the concrete can be inspected while stirring the concrete poured into the container with a stirring member. Therefore, this inspection device can inspect the concrete while stirring the concrete outside the vehicle. Therefore, it is not necessary to prepare a measuring device for each of all the cars, and one inspection device can inspect the concrete of all the cars. Therefore, concrete can be easily inspected for all vehicles, and the cost for inspection can be suppressed. Further, since this inspection device includes a strain measuring means for measuring the strain of concrete inside the container, the slump value of concrete can be obtained from the measured strain of concrete. Further, since this inspection device includes a height detecting means for detecting the height of the concrete inside the container and a mass measuring means for measuring the mass of the concrete inside the container, the height and mass of the concrete inside the container. The unit volume mass of concrete can be obtained from. In this way, since the slump value and the unit volume mass of the concrete can be obtained, the acceptance inspection of the concrete can be sufficiently performed. Therefore, concrete of poor quality can be reliably eliminated.

Further, the above-mentioned inspection device may include a moisture meter that measures the moisture content of the concrete inside the container. In this case, since the moisture content of the concrete can be measured while stirring outside the mixer truck or the agitator truck, the moisture content of the concrete can be easily grasped. Therefore, since concrete having an inappropriate water content can be reliably removed, it is possible to avoid a situation in which drying shrinkage cracks occur in the concrete.

Also, by measuring the time until vibrated the concrete height concrete converge, it is possible to measure the compaction ease of concrete by vibrating.

Further, the above-mentioned inspection device may include an acceleration sensor that detects the acceleration of vibration transmitted to the concrete by the vibration of the vibrator. In this case, since the acceleration sensor detects the vibration acceleration of the concrete, the ease of compaction of the concrete can be measured with higher accuracy.

In addition, the above-mentioned inspection device may include an imaging means for photographing the concrete inside the container. In this case, when the agitated concrete is photographed by the photographing means, the state of the concrete surface can be grasped by, for example, fluorescence analysis, and the hardness of the concrete can be obtained from the unevenness of the concrete surface. Therefore, the properties of concrete can be measured more sufficiently, and the acceptance inspection of concrete can be performed more sufficiently.

The inspection method according to the present invention is an inspection method for receiving and inspecting concrete, which includes a step of receiving concrete into a container, a step of stirring the concrete contained in the container, and a strain measuring means installed inside the container. The process of measuring the strain of concrete, the process of detecting the height of the concrete inside the container, the process of measuring the mass of the concrete inside the container, and the process of vibrating the concrete inside the container with a vibrator. It also includes a step of measuring the time until the height of the concrete converges due to the vibration of the concrete by the vibrator .

In this inspection method, the concrete in the container provided outside the mixer truck or the agitator truck is agitated to inspect the concrete. Therefore, since the concrete can be inspected outside the car, the concrete of all the cars can be inspected by one inspection device. Therefore, it is possible to easily inspect concrete for all vehicles, and it is possible to reduce the cost of inspection. Further, this inspection method includes a step of measuring the strain of the concrete inside the container, a step of detecting the height of the concrete inside the container, and a step of measuring the mass of the concrete inside the container. Therefore, as with the above-mentioned inspection device, the slump value and the unit volume mass of the concrete can be easily obtained, so that the acceptance inspection of the concrete can be sufficiently performed. Therefore, concrete of poor quality can be reliably eliminated.

Further, this inspection method may include a step of measuring the water content of the concrete inside the container. In this case, since the water content of the concrete inside the container can be easily measured, it is possible to avoid drying shrinkage cracks of the concrete.

Also, the height of the concrete measures the time until the convergence, it is possible to measure the compaction ease of concrete.

Further, this inspection method may include a step of detecting the acceleration of vibration transmitted to the concrete by the vibration of the vibrator. In this case, by detecting the vibration acceleration of the concrete, the ease of compaction of the concrete can be measured with higher accuracy.

In addition, this inspection method includes a step of measuring the ease of compaction of concrete by the amount of concrete subsidence that has fallen inside the container due to the vibration of the vibrator and the time until the height of the concrete converges. May be good. In this case, the ease of compaction of concrete can be quantified by using the amount of concrete settling inside the container and the time until the height of the concrete converges. For example, it can be determined that the smaller the value of the product of the amount of subsidence and the time until convergence is, the easier it is to compact, and the larger the value of the product is, the more difficult it is to compact. Therefore, by quantifying the ease of compaction, the ease of compaction of concrete can be easily grasped.

According to the present invention, the acceptance inspection of concrete can be easily and sufficiently performed, and concrete of poor quality can be reliably eliminated.

It is a top view which shows the example of the inspection apparatus, an agitator car and a pump car which concerns on embodiment. It is a side view which shows the inspection apparatus, an agitator car, and a pump car of FIG. It is a perspective view which shows the inspection apparatus of FIG. It is a perspective view which shows the inside of the inspection apparatus of FIG. It is a perspective view which shows the strain meter of the inspection apparatus of FIG. It is a perspective view which shows the moisture meter of the inspection apparatus of FIG. It is a top view which shows the measuring method of the degree of compaction of concrete contained in a container. It is a block diagram which shows the function of the inspection apparatus of FIG. It is a chart which shows the example of the specification table which listed the specifications required for concrete. It is a flowchart which shows an example of the inspection method which concerns on embodiment. It is a top view which shows the installation example of a density ball.

Hereinafter, the concrete inspection device and the inspection method according to the embodiment will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and duplicate description is omitted.

First, the agitator vehicle A and the pump vehicle B to which the concrete inspection device 1 according to the present embodiment is applied will be described with reference to FIGS. 1 and 2. The agitator vehicle A is a vehicle that transports ready-mixed concrete (fresh concrete) manufactured at a factory to the site. As shown in FIGS. 1 and 2, the agitator wheel A includes a cylindrical drum A1 that houses the concrete and agitates the concrete by rotating it. The pump vehicle B is, for example, a vehicle that transports concrete transported by the agitator vehicle A to a formwork installed at the site.

Two concrete transport paths R1 and R2 are provided between the agitator car A and the pump car B. The transport path R2 is a route for directly transferring concrete from the agitator vehicle A to the pump vehicle B, and the transport path R1 is a route for transferring concrete from the agitator vehicle A to the pump vehicle B via the inspection device 1. The concrete of the agitator vehicle A is first inspected by the inspection device 1 of the transport path R1, and when the inspection device 1 determines that the concrete has passed, the concrete is transferred to the pump vehicle B. After that, concrete is continuously transferred from the agitator vehicle A to the pump vehicle B via the transport path R2. The concrete determined to be unacceptable by the inspection device 1 is not transferred to the pump truck B.

As described above, the inspection device 1 inspects the concrete transported by the agitator car A before putting it into the pump car B. This concrete is fresh concrete and is unloaded before it is solidified. If a problem occurs after the concrete has hardened, it takes a lot of time to repair or remove it, so it is important to carry out a thorough quality inspection before it hardens. The inspection device 1 inspects the quality of the concrete brought into the site by the agitator vehicle A, and thereby inspects whether the slump value, density, water content, etc. of the concrete are in an appropriate state.

The inspection device 1 is arranged outside the agitator vehicle A, and performs a concrete acceptance inspection while stirring the concrete outside the agitator vehicle A. In this way, the inspection device 1 performs the acceptance inspection outside the agitator vehicle A, so that the fresh properties of the concrete can be quickly determined at the site, and one inspection device 1 can be used for a plurality of agitator vehicles A. It becomes possible to carry out an acceptance inspection.

As shown in FIG. 3, the inspection device 1 includes a container 2 for receiving the concrete C to be inspected (see FIG. 7), a stirring member 3 for stirring the concrete C in the container 2 inside the container 2, and the container 2. A load meter 4 (mass measuring means) for measuring the mass of the concrete C inside and a displacement meter 5 (height detecting means) for detecting the height of the concrete C in the container 2 are provided. The container 2 has a cylindrical shape. The container 2 and the stirring member 3 are, for example, a pan-type mixer.

The stirring member 3 includes a rotating shaft portion 3a located at the center of the container 2 in a plan view, and a plurality of rod-shaped portions 3b extending radially from the rotating shaft portion 3a. The rotating shaft portion 3a has a columnar shape and is provided near the upper end of the container 2. The rod-shaped portion 3b extends radially outward of the container 2 from the side surface of the rotating shaft portion 3a, and is bent downward on the radial outer side of the container 2. For example, three rod-shaped portions 3b are arranged at equal intervals in the circumferential direction with respect to the rotation shaft portion 3a. The stirring member 3 stirs the concrete C inside the container 2 by rotating the rod-shaped portion 3b in the circumferential direction of the container 2 with the rotation of the rotating shaft portion 3a.

The load meter 4 is arranged below the container 2, and measures the mass of the concrete C by placing the container 2 for accommodating the concrete C on the container 2. The load cell 4 is, for example, a load cell, specifically a low-floor load cell or a small load cell. The displacement meter 5 is arranged above the container 2. The displacement meter 5 is, for example, a laser displacement meter, and detects the height of the concrete C inside the container 2. The displacement meter 5 irradiates the concrete C inside the container 2 with the laser beam L from above, and receives the laser beam reflected from the concrete C to detect the distance between the displacement meter 5 and the upper surface of the concrete C. Measure the height of the concrete C. The displacement meter 5 does not have to be a laser displacement meter. The displacement meter 5 measures the height of the concrete C, for example, by transmitting ultrasonic waves to the upper surface of the concrete C, receiving the reflected wave from the upper surface with a receiver, and detecting the distance from the upper surface. It may be an ultrasonic rangefinder.

As shown in FIGS. 4 to 6, a strain meter 6 (strain measuring means) and two moisture meters 7 are mounted inside the container 2. The strain gauge 6 is fixed in a state of protruding from one rod-shaped portion 3b of the stirring member 3, for example. Since the strain gauge 6 is fixed to the rod-shaped portion 3b of the stirring member 3 in this way, the strain gauge 6 rotates with the rotation of the rotating shaft portion 3a, and the strain gauge 6 easily comes into contact with the concrete C. , It is possible to detect the strain of concrete C with high accuracy.

The strain meter 6 has a rod shape. For example, the strain gauge 6 includes a rod-shaped main body portion 6a having a built-in strain gauge, and a flange portion 6b whose diameter is increased at one end of the main body portion 6a in the longitudinal direction. The main body 6a detects the strain of the concrete C from the concrete C in contact with the main body 6a. The flange portion 6b is a portion that allows the strain gauge 6 to be attached to another member. In the present embodiment, the flange portion 6b is attached to the rod-shaped portion 3b of the stirring member 3, so that the strain gauge 6 is fixed to the stirring member 3 inside the container 2.

The moisture meter 7 is fixed to, for example, the inner peripheral surface 2a and the bottom surface 2c of the container 2. In this way, the moisture meters 7 are arranged at two locations above and below. By arranging a pair of upper and lower moisture meters 7 inside the container 2, it is possible to detect the moisture in the concrete C with high accuracy. Each moisture meter 7 includes a cylindrical sensor portion 7a and a flange portion 7b whose diameter is increased at one end of the sensor portion 7a in the axial direction. When the concrete C is applied to the sensor unit 7a, the moisture meter 7 detects the amount of water in the concrete C. The flange portion 7b is a portion that enables the moisture meter 7 to be fixed to other parts. Further, the moisture meter 7 may be, for example, a near-infrared sensor that irradiates the concrete C with near-infrared rays from above to measure the moisture content of the concrete C. In this case, the moisture content of the concrete C is measured without contact. Is possible.

Further, as shown in FIG. 7, the inspection device 1 includes an accelerometer 8 (acceleration sensor) attached to the side surface of the rotating shaft portion 3a of the stirring member 3. Further, a vibrator V is attached to the outer peripheral surface 2b of the container 2. The vibrator V vibrates the concrete C inside the container 2 via the container 2. The accelerometer 8 detects the acceleration of vibration transmitted in the concrete C. Further, the accelerometer 8 calculates the damping rate of the vibration acceleration. In general, hard concrete has a higher damping rate than soft concrete, so it is possible to obtain the hardness of concrete C from the damping rate calculated by the accelerometer 8. The mounting position of the vibrator V does not have to be the outer peripheral surface 2b, and may be mounted at another location such as the bottom surface 2c of the container 2.

Further, when the vibrator V is operated to vibrate the concrete C, the concrete C is compacted and becomes dense, and the concrete C sinks. Then, as the height of the concrete C converges, the compaction of the concrete C by the vibrator V is completed. Therefore, for example, the displacement meter 5 calculates the difference between the height of the concrete C at the start of vibration by the vibrator V and the height of the concrete C at the time of completion of compaction as the amount of sinking, and it is applied from the start of vibration to the completion of compaction. The time is calculated, and the product of the calculated sinking amount and the time can be calculated as an index of the ease of compaction of the concrete C.

As shown in FIG. 8, the inspection device 1 includes a timer 9 (time measuring means) for measuring the time until the height of the concrete C converges due to the vibration of the vibrator V. As described above, the time until the height of the concrete C converges corresponds to the time taken from the start of vibration to the completion of compaction.

The inspection device 1 further includes an ammeter 11, a torque meter 12, a thermometer 13, and a camera 14 (photographing means). The ammeter 11 measures the current supplied to the stirring member 3 when the concrete C is stirred, and detects the load value of the stirring member 3. The torque meter 12 measures the torque applied to the stirring member 3 when the concrete C is stirred, and detects the viscosity of the concrete C.

The thermometer 13 measures, for example, the temperature of the concrete C while being inserted into the concrete C inside the container 2. The temperature of the concrete C may be measured by thermography instead of the insertion type thermometer 13. The camera 14 photographs the concrete C inside the container 2 from above in order to calculate the fresh properties such as the hardness of the concrete C.

The inspection device 1 has a determination unit 20 for determining the freshness of the concrete C inside the container 2, a display device 31 for displaying the result determined by the determination unit 20, and the result determined by the determination unit 20 is not good. It is provided with an alarm device 32 that outputs an alarm in case of a case. Further, the above-mentioned load meter 4, displacement meter 5, strain meter 6, moisture meter 7, accelerometer 8, timer 9, ammeter 11, torque meter 12, thermometer 13 and camera 14 are wirelessly connected to the determination unit 20, for example. It is possible to communicate with. The results measured by the load meter 4, the displacement meter 5, the strain meter 6, the hygrometer 7, the accelerometer 8, the timer 9, the ammeter 11, the torque meter 12 and the thermometer 13, and the image taken by the camera 14 are the judgment unit 20. Is output to.

The determination unit 20 includes a calculation unit 21, a storage unit 22, and a control unit 23. The determination unit 20 may be, for example, a general-purpose personal computer, and includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). Each function of the determination unit 20 is realized, for example, by loading the program stored in the ROM into the RAM and executing it in the CPU.

The calculation unit 21 is a measurement result of the load meter 4, the displacement meter 5, the strain meter 6, the hygrometer 7, the accelerometer 8, the timer 9, the ammeter 11, the torque meter 12, and the thermometer 13 input to the determination unit 20. In addition, the properties of the concrete C are calculated from the image taken by the camera 14. The calculation unit 21 calculates the unit volume mass of the concrete C and the amount of air in the concrete C from the measurement results of the load meter 4 and the displacement meter 5. Specifically, the calculation unit 21 calculates the volume of the concrete C inside the container 2 from the height of the concrete C measured by the displacement meter 5. The calculation unit 21 calculates the unit volume mass of the concrete C by dividing the mass of the concrete C measured by the load meter 4 by the volume calculated above. The calculation unit 21 calculates the amount of air contained in the concrete C from the unit volume mass.

The calculation unit 21 calculates the slump value of the concrete C from the measurement results of the strain meter 6, the ammeter 11, and the torque meter 12. The calculation unit 21 determines that the larger each value measured by the strain gauge 6, the ammeter 11 and the torque meter 12, the smaller the slump value of the concrete C, and the calculation unit 21 measures the concrete C by the strain gauge 6, the ammeter 11 and the torque meter 12. It is judged that the smaller each value is, the larger the slump value of concrete C is. The relationship between the slump value calculated by the calculation unit 21 and each value measured by the strain meter 6, the ammeter 11 and the torque meter 12 is set in advance by calibration.

Further, the calculation unit 21 calculates the unit water amount of the concrete C from the measurement result of the moisture meter 7. The calculation unit 21 calculates the ease of compaction of the concrete C from the measurement results of the accelerometer 8 and the timer 9. The calculation unit 21 generates time-series data of the displacement amount of the concrete C when the concrete C is vibrated from the displacement meter 5 and the timer 9, and determines that it is difficult to compact the concrete C when the displacement time is long (slow). May be good.

The calculation unit 21 may calculate the ease of compaction from the damping rate measured by the accelerometer 8. In this case, the calculation unit 21 determines that the smaller the acceleration damping rate is, the more difficult it is to compact, and the larger the acceleration damping rate is, the easier it is to compact. Further, the calculation unit 21 generates time-series data of the viscosity of concrete C at the time of vibration using the measurement results of the timer 9 and the torque meter 12 (viscosity meter), and when the time until the viscosity becomes small is short. It may be judged that the compaction performance is good.

The storage unit 22 is a database that stores the unit volume mass of the concrete C, the slump value of the concrete C, the unit water amount of the concrete C, and the ease of compaction of the concrete C calculated by the calculation unit 21. The storage unit 22 stores the value of the temperature of the concrete C measured by the thermometer 13. Further, the storage unit 22 stores the permissible range of the unit volume mass of the concrete C, the permissible range of the slump value, the permissible range of the unit water amount, the permissible range of the compaction performance, and the permissible range of the temperature. The value of the permissible range stored in the storage unit 22 can be appropriately changed according to the required properties of the concrete C.

The calculation unit 21 determines the pass / fail of the concrete C placed in the container 2 and stirred by the stirring member 3 from the calculated unit volume mass, slump value, unit water amount, compaction performance, and temperature. Specifically, the calculation unit 21 determines that the measurement is acceptable when all the measured values are within the allowable range, and determines that the measurement is rejected when any of the measured values is out of the allowable range. To do. The result determined by the calculation unit 21 in this way is stored in the storage unit 22. Further, the control unit 23 controls the display device 31 and the alarm device 32 by using the property data of the concrete C stored in the storage unit 22. The display device 31 and the alarm device 32 each operate under the control of the control unit 23.

The display device 31 is provided with a display for displaying the property data of the concrete C to the workers at the site. For example, the display device 31 is a unit volume mass, a slump value, a unit water amount, a compaction performance, a temperature, and a calculation unit of the concrete C delivered from the agitator wheel A, put in the container 2, and agitated by the stirring member 3. The pass / fail judgment determined by 21 is displayed.

The alarm device 32 outputs an alarm when the calculation unit 21 determines that the concrete C has failed. The alarm device 32 may be a display device such as a patrol lamp, a voice output device such as a siren, or a portable terminal owned by an operator or the like. By receiving an alarm from the alarm device 32, the operator or the like can grasp that the quality of the concrete C put in the container 2 is not good.

Next, an inspection method for performing an acceptance inspection of the concrete C conveyed by the agitator vehicle A will be described with reference to FIGS. 9 and 10. FIG. 9 shows a specification table required for the concrete C to be accepted, and shows a slump value, an air amount, a unit water amount, a unit cement amount, a water-cement ratio, and a temperature allowable range to be satisfied by the concrete C. In the present embodiment, the slump value, the air amount, the unit water amount, the unit cement amount, the water-cement ratio, and the temperature value correspond to the fresh properties of the concrete C. The range of each value described in this specification table corresponds to the permissible range stored in the storage unit 22. The unit cement amount is a known value stored in advance in the storage unit 22.

As shown in FIG. 10, first, the acceptance of the concrete C from the agitator wheel A into the container 2 is executed (step S1). At this time, fresh concrete is poured from the drum A1 of the agitator vehicle A into the container 2 and the concrete C is received into the container 2 (acceptance step).

Further, while executing the step of receiving the concrete C, the stirring member 3 is rotated to stir the concrete C received in the container 2 (step S2). At this time, the rotating shaft portion 3a of the stirring member 3 rotates, and the rod-shaped portion 3b rotates around the rotating shaft portion 3a, whereby the concrete C inside the container 2 is stirred (stirring step).

While stirring the concrete C with the stirring member 3 as described above, the load meter 4, the displacement meter 5, the strain meter 6, the hygrometer 7, the accelerometer 8, the timer 9, the ammeter 11, the torque meter 12, and the thermometer 13 , The camera 14 and the vibrator V measure various items of the concrete C (step S3). Specifically, the strain gauge 6 measures the strain of the concrete C (fixed to measure the strain), the displacement meter 5 detects the height of the concrete C (the process of detecting the height), and the load gauge 4 measures the concrete. Measure the mass of C (step of measuring the mass). From the height and mass obtained in these steps, the calculation unit 21 calculates the unit volume mass of the concrete C and the air amount of the concrete C (step of calculating the unit volume mass and the air amount).

While stirring the concrete C by the stirring member 3, the moisture meter 7 measures the moisture content of the concrete C (step of measuring the moisture content). The value of the moisture content of the concrete C measured by the moisture meter 7 is stored in the storage unit 22. The thermometer 13 measures the temperature of the concrete C, and the value of the temperature of the concrete C measured by the thermometer 13 is stored in the storage unit 22. Further, the camera 14 takes an image of the concrete C being stirred by the stirring member 3, and the image is stored in the storage unit 22. The calculation unit 21 performs fluorescence analysis from the image of the concrete C stored in the storage unit 22 and measures the unevenness of the surface of the concrete C. Then, the calculation unit 21 calculates the hardness of the concrete C from the unevenness of the surface, and the calculated hardness is stored in the storage unit 22.

Then, the vibrator V is attached to the container 2 to vibrate the concrete C inside the container 2, and the displacement meter 5 acquires the height of the concrete C. The calculation unit 21 calculates the difference between the height of the concrete C at the start of vibration and the height of the concrete C at the time of convergence as the settlement amount from the height of the concrete C obtained from the displacement meter 5 and the time measured by the timer 9. .. Further, the calculation unit 21 calculates, for example, the ease of compaction of the concrete C from the calculated settlement amount and the time required to complete the compaction.

Further, the accelerometer 8 may be attached to the rotating shaft portion 3a of the stirring member 3. At this time, the vibrator V vibrates the concrete C, and the accelerometer 8 acquires the vibration acceleration of the concrete C. For example, the calculation unit 21 calculates the acceleration attenuation rate from the time series data of the vibration acceleration obtained from the accelerometer 8, and calculates the ease of compaction of the concrete C from the calculated attenuation rate.

As described above, the calculation unit 21 can calculate the ease of compaction of the concrete C from the calculated sinking amount and the time required to complete the compaction, and the ease of compaction from the damping rate of the vibration acceleration. It is also possible to calculate. In this way, it is possible to calculate the ease of compaction with higher accuracy by comparing the ease of compaction calculated from the settlement amount and time with the ease of compaction calculated from the damping rate of the vibration acceleration.

The calculation unit 21 calculates the slump value of the concrete C from the measurement results of the strain meter 6, the ammeter 11, and the torque meter 12. Further, the calculation unit 21 calculates the water-cement ratio from the values of the unit cement amount and the water amount stored in the storage unit 22. As described above, the calculation unit 21 calculates the slump value, the amount of air, the amount of unit water, the water-cement ratio, the temperature, and the ease of compaction with respect to the concrete C inside the container 2.

As described above, after measuring various items on the concrete C inside the container 2, it is determined whether or not each of the measured values satisfies the allowable range of the specification table of FIG. 9 (step S4). ). At this time, the calculation unit 21 determines that the value is acceptable when all of the measured values are within the allowable range, and determines that the value is rejected when any of the measured values is out of the allowable range.

If, as a result of the determination in step S4, it is determined that the result is acceptable, the process proceeds to step S5 and the concrete C receiving step is executed. At this time, for example, under the control of the control unit 23, the display device 31 is displayed to indicate that the concrete C satisfies the quality requirement and has passed. On the other hand, if it is determined that the result is unacceptable as a result of the determination in step S4, the step of moving to step S6 and refusing to accept the concrete C is executed. At this time, under the control of the control unit 23, the display device 31 displays that the concrete C does not satisfy the quality requirement and fails, and the alarm device 32 outputs an alarm. As a result, the worker or the like can grasp that the quality of the concrete C is not good. As described above, the inspection of the concrete C for one agitator vehicle A is completed through the steps S5 or S6.

After the inspection of the concrete C for one agitator vehicle A is completed, the concrete C is introduced from the agitator vehicle A to the pump vehicle B using the transport path R2. In the inspection device 1, it is possible to inspect the concrete C of another agitator vehicle A in parallel with the introduction of the concrete C from the agitator vehicle A to the pump vehicle B. In this way, by performing the introduction of the concrete C from one agitator vehicle A and the inspection of the concrete C of the other agitator vehicle A in parallel, all the vehicles of the concrete C of the plurality of agitator vehicles A can be inspected and introduced. It can be done efficiently.

Next, the effects obtained from the concrete C inspection device 1 and the inspection method according to the present embodiment will be described in detail.

The inspection device 1 includes a container 2 for receiving the concrete C and a stirring member 3 for stirring the concrete C put in the container 2. Therefore, the concrete C can be poured into the container 2 from the agitator wheel A, and the concrete C can be inspected while the concrete C poured into the container 2 is stirred by the stirring member 3. Therefore, in the inspection device 1, the concrete C can be inspected while stirring the concrete C outside the agitator wheel A. Therefore, it is not necessary to prepare a measuring device for each of all the agitator vehicles A, and one inspection device 1 can inspect the concrete C of all the agitator vehicles A. Therefore, since the concrete C can be easily inspected for all the agitator vehicles A, the cost for the inspection can be suppressed.

Further, since the inspection device 1 includes a strain gauge 6 for measuring the strain of the concrete C inside the container 2, the slump value of the concrete C can be obtained from the measured strain of the concrete C. Further, since the inspection device 1 includes a displacement meter 5 for detecting the height of the concrete C inside the container 2 and a load meter 4 for measuring the mass of the concrete C inside the container 2, the container 2 The unit volume mass of the concrete C can be obtained from the height and mass of the concrete C inside. In this way, since the slump value and the unit volume mass of the concrete C can be obtained, the acceptance inspection of the concrete C can be sufficiently performed. Therefore, the concrete C having poor quality can be reliably eliminated.

Further, the inspection device 1 includes a moisture meter 7 for measuring the moisture content of the concrete C inside the container 2. Therefore, since the water content of the concrete C can be measured while stirring outside the agitator vehicle A, the water content of the concrete C can be easily grasped. Therefore, since the concrete C having an inappropriate water content can be reliably eliminated, it is possible to avoid a situation in which the concrete C undergoes drying shrinkage cracks.

Further, the inspection device 1 includes a vibrator V attached to the container 2 and a timer 9 for measuring the time until the height of the concrete C converges due to the vibration of the vibrator V on the concrete C inside the container 2. Be prepared. Therefore, by measuring the time required for the concrete C to be vibrated and the height of the concrete C to converge, the ease of compaction of the concrete C by the vibration can be measured.

Further, the inspection device 1 includes an accelerometer 8 that detects the acceleration of vibration transmitted to the concrete C by the vibration of the vibrator V. Therefore, since the accelerometer 8 detects the vibration acceleration of the concrete C, the ease of compaction of the concrete C can be measured with higher accuracy.

Further, the inspection device 1 includes a camera 14 for photographing the concrete C inside the container 2. Therefore, when the camera 14 takes a picture of the agitated concrete C, the state of the surface of the concrete C can be grasped by fluorescence analysis, and the hardness of the concrete C can be obtained from the unevenness of the surface of the concrete. Therefore, the properties of the concrete C can be measured more sufficiently, and the acceptance inspection of the concrete C can be performed more sufficiently.

In the method for inspecting concrete C according to the present embodiment, the concrete C inside the container 2 provided outside the agitator vehicle A is agitated to inspect the concrete C. Therefore, all the agitator vehicles are inspected by one inspection device 1. Concrete C of A can be inspected. Therefore, the cost of inspection can be suppressed. Further, this inspection method includes a step of measuring the strain of the concrete C inside the container 2, a step of detecting the height of the concrete C inside the container 2, and a step of measuring the mass of the concrete C inside the container 2. And. Therefore, since the slump value and the unit volume mass of the concrete C can be obtained, the acceptance inspection of the concrete C can be sufficiently performed. Therefore, the concrete C having poor quality can be reliably eliminated.

Further, this inspection method includes a step of measuring the water content of the concrete C inside the container 2. Therefore, since the water content of the concrete C inside the container 2 can be easily measured, it is possible to avoid the drying shrinkage cracks of the concrete C.

Further, this inspection method includes a step of vibrating the concrete C inside the container 2 with a vibrator V and a step of measuring the time until the height of the concrete C converges due to the vibration of the concrete C by the vibrator V. To be equipped. Therefore, the ease of compaction of the concrete C can be measured by measuring the time until the height of the concrete C converges.

Further, this inspection method includes a step of detecting the acceleration of vibration transmitted to the concrete C by the vibration of the vibrator V. Therefore, by detecting the vibration acceleration of the concrete C, the ease of compaction of the concrete C can be measured with higher accuracy.

Further, in this inspection method, the ease of compaction of the concrete C is measured by the amount of subsidence of the concrete C lowered inside the container 2 due to the vibration of the vibrator V and the time until the height of the concrete C converges. Provide a process to do. Therefore, the ease of compaction of the concrete C can be quantified by using the amount of the subsidence of the concrete C that has settled inside the container 2 and the time until the height of the concrete C converges. For example, it can be determined that the smaller the value of the product of the amount of subsidence and the time until convergence is, the easier it is to compact, and the larger the value of the product is, the more difficult it is to compact. Therefore, the ease of compaction of the concrete C can be easily grasped by quantifying the ease of compaction.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the gist described in each claim is modified or applied to other objects without changing the gist. It may be a thing. That is, each configuration of the inspection device and each step of the inspection method can be variously modified without departing from the gist of each claim.

For example, in the above-described embodiment, the inspection device 1 for inspecting the slump value, unit water amount, unit volume mass, air amount, ease of compaction, and temperature of concrete C has been described. However, the inspection items of the inspection apparatus of the present invention are not limited to the above contents. For example, as shown in FIG. 11, the inspection device may include a density measuring means 41 for measuring the density of concrete C.

The density measuring means 41 includes, for example, a rectangular support portion 42 fixed to the inner peripheral surface 2a of the container 2 and a plurality of density balls 43, 44, 45 supported by the support portion 42. The support portion 42 projects inward in the radial direction of the container 2 from the inner peripheral surface 2a. Further, the support portion 42 has a plurality of through holes 42a penetrating vertically. The density balls 43, 44, 45 are, for example, spherical, and the densities of the density balls 43, 44, 45 are different from each other. The density of concrete C inside the container 2 can be measured by how many density balls float among these density balls 43, 44, 45. The number of density balls can be changed as appropriate. Further, instead of the density ball, the density of the concrete C may be measured by a float type hydrometer. In this case, for example, the density of the concrete C is measured by inserting a rod-shaped float hydrometer into the concrete C from above. The measured density value is stored in the storage unit 22 and used for the calculation of the calculation unit 21. Therefore, the calculation unit 21 can determine the pass / fail of the density of the concrete C.

Further, in the above-described embodiment, the inspection device 1 including a load meter 4, a displacement meter 5, a strain meter 6, a hygrometer 7, an accelerometer 8, a timer 9, an ammeter 11, a torque meter 12, a thermometer 13, and a camera 14 However, the configuration of the inspection device 1 can be appropriately changed according to the inspection items and the like. That is, any one of the load meter 4, the displacement meter 5, the strain meter 6, the moisture meter 7, the accelerometer 8, the timer 9, the ammeter 11, the torque meter 12, the thermometer 13, and the camera 14 may be omitted. For example, it may be an inspection device provided with only a strain meter and the calculation unit estimates a slump value from the measured strain.

Further, in the above-described embodiment, an example in which the required fresh properties are the slump value, the air amount, the unit water amount, the unit cement amount, the water-cement ratio, and the temperature has been described, but the items of the fresh properties are the above items. It is not limited to, but can be changed as appropriate.

Further, in the above-described embodiment, an example in which the concrete C is introduced from the agitator vehicle A to the pump vehicle B after the inspection of the concrete C for one agitator vehicle A is completed has been described. However, the inspection of concrete for the agitator vehicle A and the introduction of concrete may be continuously performed. In this case, it is possible to perform a 100% inspection of all concrete. Further, the inspection device may inspect the concrete of the mixer truck other than the agitator truck A.

Further, in the above-described embodiment, since the inspection device 1 includes the container 2 and the stirring member 3 which are pan-type mixers, the existing pan-type mixer can be effectively utilized for the inspection device 1. However, the inspection device may be provided with another container and a stirring member instead of the pan-type mixer.

In addition, the shape, size, placement location, and number of agitating member 3, load meter 4, displacement meter 5, strain meter 6, moisture meter 7, accelerometer 8, timer 9, ammeter 11, thermometer 13, and camera 14. Can be changed as appropriate. Further, the configurations of the determination unit 20, the display device 31, and the alarm device 32 are not limited to the above-described embodiment and can be changed as appropriate. Further, the value of the permissible range described in the specification table shown in FIG. 9 can be changed as appropriate.

1 ... Inspection device, 2 ... Container, 2a ... Inner peripheral surface, 2b ... Outer peripheral surface, 3 ... Stirring member, 3a ... Rotating shaft part, 3b ... Rod-shaped part, 4 ... Load meter (mass measuring means), 5 ... Displacement meter (Height detecting means), 6 ... Strain meter (strain measuring means), 6a ... Main body, 6b ... Flange, 7 ... Moisture meter, 7a ... Sensor, 7b ... Flange, 8 ... Accelerometer (accelerometer) , 9 ... Timer (time measuring means), 11 ... Current meter, 12 ... Torque meter, 13 ... Thermometer, 14 ... Camera (shooting means), 20 ... Judgment unit, 21 ... Calculation unit, 22 ... Storage unit, 23 ... Control unit, 31 ... Display device, 32 ... Alarm device, 41 ... Density measuring means, 42 ... Support unit, 42a ... Through hole, 43, 44, 45 ... Density ball, A ... Agitator car, A1 ... Drum, B ... Pump Car, C ... concrete, R1, R2 ... transport path, V ... vibrator.

Claims (8)

It is an inspection device that performs acceptance inspection of concrete.
The container that accepts the concrete and
A stirring member that stirs the concrete placed in the container, and
A strain measuring means mounted inside the container and measuring the strain of the concrete,
A height detecting means for detecting the height of the concrete inside the container, and
A mass measuring means for measuring the mass of the concrete inside the container,
The vibrator attached to the container and
A time measuring means for measuring the time until the height of the concrete converges due to the vibration of the inside of the container to the concrete by the vibrator.
Inspection device equipped with. A moisture meter for measuring the moisture content of the concrete inside the container is provided.
The inspection device according to claim 1. An acceleration sensor for detecting the acceleration of vibration transmitted to the concrete by the vibration of the vibrator is provided.
The inspection device according to claim 1 or 2 . A means for photographing the concrete inside the container.
The inspection device according to any one of claims 1 to 3 . It is an inspection method that performs acceptance inspection of concrete.
The process of receiving the concrete in a container and
The step of stirring the concrete placed in the container and
The process of measuring the strain of the concrete by the strain measuring means installed inside the container, and
The process of detecting the height of the concrete inside the container and
The process of measuring the mass of the concrete inside the container and
The process of vibrating the concrete inside the container with a vibrator and
A step of measuring the time until the height of the concrete converges due to the vibration of the concrete by the vibrator, and
Inspection method including. A step of measuring the moisture content of the concrete inside the container is provided.
The inspection method according to claim 5 . A step of detecting the acceleration of vibration transmitted to the concrete by the vibration of the vibrator is provided.
The inspection method according to claim 5 or 6 . A step of measuring the ease of compaction of the concrete by the amount of subsidence of the concrete lowered inside the container by the vibration of the vibrator and the time until the height of the concrete converges is provided.
The inspection method according to any one of claims 5 to 7 .