JP7453794B2 - Concrete pouring management system - Google Patents

Description

The present invention relates to a concrete placement management system.

Conventionally, concrete used in concrete pouring work is mixed at a concrete plant and transported to the site using a truck. The transported concrete is poured into the desired location using concrete pump trucks, buckets, etc. The transport time for fresh concrete is defined in JIS A 5308 as the time from the start of mixing until the transport vehicle arrives at the unloading point, and the time is stipulated to be within 1.5 hours in principle. There is. Furthermore, JASS5 and the Japan Society of Civil Engineers' concrete standard specifications stipulate a time limit from mixing to finishing pouring.

Concrete manufacturers are obligated to issue a delivery note for each transport vehicle for concrete delivered to the site and submit it to the constructor. Concrete transportation time is confirmed by the difference in delivery departure and arrival times written on the delivery note. Furthermore, the time required for driving is managed by visually checking and recording by on-site staff. Such a management method requires a great deal of effort to manage all the delivery notes. Furthermore, since the completion of driving is managed visually, there is a risk of omissions in recording.

As a conventional concrete placement management method for solving these problems, a concrete placement management method using a work terminal has been proposed (see, for example, Patent Document 1). In Patent Document 1, each person in charge inputs the time of each work into a plurality of terminals such as a shipping work terminal, an arrival work terminal at a site, an unloading work terminal, and a pouring work terminal at a concrete plant. .

JP2018-35628A

However, the above-mentioned Patent Document 1 replaces the conventional management using delivery notes with management using a terminal, and requires time and effort for each person in charge to input time data. Therefore, there has been a need for a technology that can reduce the amount of time and effort required by humans to input time data.

The present invention has been made in view of the above, and an object of the present invention is to provide a concrete placement management system that can reduce the time and effort required by humans to input time data.

In order to solve the above-mentioned problems and achieve the purpose, the concrete placement management system according to the present invention is a system for managing the transportation and placement of concrete, and is a system for managing the transportation and placement of concrete. Transmitting means installed at predetermined locations at the pouring site and the concrete pouring machine or equipment, and transmitting means installed on the transport vehicle that transports concrete from the concrete plant to the vicinity of the concrete pouring machine or implement in the pouring site, The present invention is characterized by comprising a receiving means for performing wireless communication with the transmitting means, and a recording means for recording time information regarding the transportation and pouring of concrete according to the communication status between each transmitting means and the receiving means.

Another concrete placement management system according to the present invention is a system for managing the transportation and placement of concrete, and includes a concrete plant that produces fresh concrete, a concrete placement site, and a concrete placement machine or equipment. A transmitter that performs wireless communication between receiving means installed at each predetermined location and each receiving means installed on a transport vehicle that transports concrete from the concrete plant to near the concrete pouring machine or equipment at the pouring site. and recording means for recording time information regarding conveyance and pouring of concrete depending on the communication state between each transmitting means and receiving means.

Another concrete pouring management system according to the present invention is characterized in that, in the above-mentioned invention, it further comprises an acceleration detection means for detecting the acceleration acting on the transmitting means installed in the transport vehicle, and the recording means records time information regarding the transportation and pouring of concrete according to the communication state between each transmitting means and the receiving means and the acceleration detected by the acceleration detection means.

Further, another concrete placement management system according to the present invention is characterized in that, in the above-described invention, the system further includes an output means for outputting recorded time information.

According to the concrete placement management system according to the present invention, the system is for managing the transportation and placement of concrete, and is a system for managing the transportation and placement of concrete. A transmitting means installed at a predetermined location, and a receiving means installed on a transport vehicle that transports concrete from a concrete plant to near a concrete pouring machine or equipment at a pouring site and performing wireless communication with each transmitting means. , recording means for recording time information related to transporting and pouring concrete according to the communication status between each transmitting means and receiving means, so that it is possible to reduce the time and effort required by humans to input time information, and to improve concrete mixing. This has the effect of greatly reducing labor in time management for concrete transportation and pouring work, from mixing to pouring. In addition, since time information regarding concrete transportation and pouring can be automatically and reliably recorded for all transport vehicles, it is possible to prevent record omissions.

According to another concrete placement management system according to the present invention, it is a system for managing the transportation and placement of concrete, and includes a concrete plant for producing fresh concrete, a concrete placement site, a concrete placement machine, or Wireless communication is established between the receiving means installed at a predetermined location of each of the equipment and the receiving means installed on a transport vehicle that transports concrete from the concrete plant to the vicinity of the concrete placing machine or equipment at the pouring site. Since the present invention is equipped with a transmitting means for transmitting and a recording means for recording time information regarding transportation and pouring of concrete according to the communication status between each transmitting means and receiving means, it is possible to reduce the time and effort required by humans to input time information. This has the effect of greatly reducing labor in time management for concrete transportation and pouring operations, from mixing and producing concrete to pouring. In addition, since time information regarding concrete transportation and pouring can be automatically and reliably recorded for all transport vehicles, it is possible to prevent record omissions.

Further, according to another concrete placement management system according to the present invention, the system further includes an acceleration detection means for detecting the acceleration acting on the transmitting means installed in the transport vehicle, and the recording means includes each transmitting means and the receiving means. According to the communication status between the two and the acceleration detected by the acceleration detection means, time information related to transporting and placing concrete is recorded, so changes in rotation of the drum of the transport vehicle when transitioning to placing can be detected by acceleration. This brings about the effect that time information regarding driving can be reliably recorded.

Further, according to another concrete placement management system according to the present invention, since the system further includes an output means for outputting the recorded time information, the time information can be recorded quickly and easily using an output means such as a terminal held by a site staff member. This has the effect of being able to be understood.

FIG. 1 is a schematic diagram showing Embodiment 1 of a concrete placement management system according to the present invention. FIG. 2 is a diagram showing an example of information output from a terminal held by a site staff member. FIG. 3 is a schematic diagram showing a second embodiment of the concrete placement management system according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a concrete placement management system according to the present invention will be described in detail below based on the drawings. Note that the present invention is not limited to this embodiment.

(Embodiment 1)
First, Embodiment 1 of the present invention will be described.
As shown in FIG. 1, an example will be explained in which concrete is transported from a concrete plant 12 to a pouring site 14 by a transport vehicle 10 such as an agitator vehicle, and then concrete is poured by pumping using a concrete pump vehicle 18. . In addition, although five transport vehicles are used in the example of FIG. 1, the present invention is not limited to this.

The concrete placement management system 100 according to the first embodiment is installed at various locations in the concrete plant 12, the entrance 16 of the placement site 14, and the concrete pump truck 18 (concrete placement machine or equipment) located within the placement site 14. Beacons 1 to 3 (transmitting means), a terminal 20 (receiving means, hereinafter referred to as the transport vehicle terminal) installed in each concrete transport vehicle 10, a server 22 (recording means), and a terminal 24 held by the site staff ( (hereinafter referred to as the staff terminal).

Beacons 1 to 3 are beacons that wirelessly communicate various information with nearby transport vehicle terminals 20, and are composed of, for example, optical beacons, radio wave beacons, and the like. The beacon 1 may be installed anywhere within the concrete plant 12 as long as communication with the transport vehicle terminal 20 can be established. For example, the beacon 1 may be installed at the entrance of the plant 12, directly below the mixer, or at a place where concrete is loaded onto the transport vehicle 10. Can be done. The beacon 2 is installed at the gate of the entrance 16 of the driving site 14. The beacon 3 is installed in the hopper of the pump truck 18. Note that the installation locations of each of the beacons 1 to 3 are not limited to these.

The transport vehicle terminal 20 is composed of a tablet terminal capable of wireless communication with each of the beacons 1 to 3 and the server 22. The transport vehicle terminal 20 may be installed anywhere on the transport vehicle 10 as long as it can be connected to each of the beacons 1 to 3 and the server 22.

The attendant terminal 24 is comprised of a tablet terminal capable of wireless communication with the server 22, and its display screen functions as an output means of the present invention. The attendant terminal 24 may be located at any location as long as it can be connected to the server 22. The server 22 may be installed anywhere as long as it can be connected from the transport vehicle terminal 20 and the staff terminal 24, for example, it may be installed at a field office or on the cloud.

This concrete placement management system 100 records time information regarding the transportation and placement of concrete according to the communication status between each beacon 1 to 3 and the transport vehicle terminal 20. Each time information is recorded on the server 22 via the carrier terminal 20. Next, an example of time information obtained from communication record data between each of the beacons 1 to 3 and the transport vehicle terminal 20 will be described.

(a) Communication record between beacon 1 and transport vehicle terminal 20: Plant departure time and plant return time of transport vehicle 10 When beacon 1 is installed near a mixer, transport vehicle 10 is placed directly under the mixer while concrete is being mixed. It is on standby, and communication is always connected during this time. After the mixing is completed, concrete is put into the transport vehicle 10, and the transport vehicle 10 starts moving, thereby increasing the distance between the beacon 1 and the transport vehicle terminal 20, reducing the communication strength or disconnecting the communication. The plant departure time may specify either the time when the communication strength decreases or the time when the communication is disconnected. When the beacon 1 is installed at the entrance of the plant 12, the time when communication with the carrier terminal 20 is established is recorded as the plant departure time. On the other hand, the time when the transport vehicle 10 returns from the driving site 14 to the plant 12 and communication between the transport vehicle terminal 20 and the beacon 1 is reconnected is recorded as the plant return time.

(b) Communication record between the beacon 2 and the transport vehicle terminal: time of arrival at the site and time of exit When the beacon 2 is installed at the gate of the entrance 16 of the driving site 14, the communication between the beacon 2 and the transport vehicle terminal 20 is connected. Record the time as the time of arrival at the site. After discharging the concrete, when leaving the entrance 16 of the pouring site 14, the time when communication between the transport vehicle terminal 20 and the beacon 2 is reconnected is recorded as the site exit time.

(c) Communication record between the beacon 3 and the transport vehicle terminal: Concrete pouring start and completion time When the beacon 3 is installed near the hopper of the pump truck 18, the transport vehicle 10 stands by to discharge concrete to the pump truck 18. When approaching the pump truck 18 from the location, communication between the beacon 3 and the transport vehicle terminal 20 is connected. This connection start time is recorded as the start time of placing the concrete loaded on the transport vehicle 10. After the concrete is discharged, the transport vehicle 10 immediately moves away from the pump vehicle 18, and therefore communication is cut off. This communication disconnection time is recorded as the typing completion time.

Note that if the standby place is not far from the position of the pump truck 18, there is a possibility that communication will be connected even at the standby place. In that case, the input start/completion time can be determined based on the communication strength between the beacon 3 and the carrier terminal 20. For example, the relationship between the distance between the transport vehicle terminal 20 and the beacon 3 and the communication strength thereof is obtained in advance, and a threshold value for determining that the pump truck 18 and the transport vehicle 10 are in a close state is determined. . Then, the time when the communication strength between the beacon 3 and the transport vehicle terminal 20 becomes equal to or higher than the threshold value is recorded as the input start time. On the other hand, the time when the transport vehicle 10 moves and the communication strength between the beacon 3 and the transport vehicle terminal 20 decreases and falls below the threshold value is recorded as the input completion time.

Communication record data between the beacons 1 to 3 and the transport vehicle terminal 20 is stored in the server 22 from the transport vehicle terminal 20. The communication record data stored in the server 22 can be output to the staff terminal 24 held by the site staff. An example of output to the staff terminal 24 is shown in FIG.

The staff terminal 24 may perform arithmetic processing on the following items and display them as output. For example, the transport vehicle number (vehicle number assigned to each transport vehicle 10 (can also be a license plate)), the number of transport vehicles (the number of transport vehicles 10 that will arrive at the driving site 14), the scheduled arrival time at the site (the number of driving vehicles 10 that has been created in advance), In the design plan, the scheduled arrival time of the transport vehicle 10 at the site), the plant departure time, the return time (see (a) above), the site arrival time, the exit time (see (b) above), the driving start time, Driving completion time (see (c) above), transport time (time required from departure of each transport vehicle 10 to arrival at site), allowable driving time (allowable time for driving completion of each transport vehicle 10), next time Possible plant departure time (time at which the transport vehicle 10 that has returned to the plant 12 can then load concrete and leave the plant 12), site arrival delay time (between the scheduled arrival time of the transport vehicle 10 and the actual site arrival time) difference) etc.

Note that as a method for acquiring position information of the transport vehicle 10 from the plant 12 at the driving site 14, a well-known operation management system that acquires position information using positioning data from an artificial satellite can be used.

According to the first embodiment, time information regarding concrete transportation and pouring is recorded according to the communication status between each beacon 1 to 3 and the transport vehicle terminal 20, thereby reducing the time and effort required by humans to input time information. can be reduced. Therefore, it is possible to significantly save labor in time management of concrete transportation and pouring operations from mixing and producing concrete to pouring. Further, since time information regarding the transportation and pouring of concrete can be automatically and reliably recorded for all transport vehicles 10, it is possible to prevent omissions in recording. Furthermore, if driving is delayed due to traffic jams, troubles at the site, etc., and it becomes difficult to transport or drive within the allowable time, this information can be quickly and easily grasped.

(Embodiment 2)
Next, a second embodiment of the present invention will be described.
The concrete placement management system according to the second embodiment corresponds to the above-described first embodiment in which the transmitting means (beacons 1 to 3) and the receiving means (the driving vehicle terminal 20) are replaced.

As shown in FIG. 3, the concrete placement management system 200 according to the second embodiment is installed at various locations in the concrete plant 12, the entrance 16 of the placement site 14, and the concrete pump truck 18 located within the placement site 14. Receiving terminals 1A to 3A (receiving means, hereinafter referred to as receiving terminals), beacons 20A with acceleration sensors (transmitting means, hereinafter referred to simply as beacons) installed in each concrete transport vehicle 10, It includes a server 22 and a staff terminal 24 held by a field staff member.

The receiving terminals 1A to 3A are comprised of tablet terminals capable of wireless communication with the beacon 20A and the server 22. The receiving terminal 1A may be installed anywhere within the concrete plant 12 as long as communication can be established with the beacon 20A and the server 22. For example, the receiving terminal 1A may be installed at the entrance of the plant 12, directly below the mixer, or at a place where concrete is loaded into the transport vehicle 10. can do. The receiving terminal 2A is installed at the gate of the entrance 16 of the driving site 14. The receiving terminal 3A is installed in the hopper of the pump truck 18. Note that the installation locations of each receiving terminal 1A to 3A are not limited to these locations.

The attendant terminal 24 is comprised of a tablet terminal capable of wireless communication with the server 22, and its display screen functions as an output means of the present invention. The attendant terminal 24 may be located at any location as long as it can be connected to the server 22. The server 22 may be installed anywhere as long as it can be connected from the reception terminals 1A to 3A and the staff terminal 24, whether it is in the field office or on the cloud.

The beacon 20A is a beacon that wirelessly communicates various information with nearby receiving terminals 1A to 3A, and is composed of, for example, an optical beacon, a radio beacon, etc., and has an acceleration sensor as an acceleration detection means. The beacon 20A may be installed anywhere on the drum provided in the transport vehicle 10. The drum is a rotating container that contains concrete, and is constantly rotated to keep the concrete within the drum until it is discharged to the outside. When discharging concrete, reverse the direction of rotation. By installing a beacon 20A with an acceleration sensor on this drum, information on the drum's rotational speed and rotational direction can be obtained from changes in the direction of acceleration acting on the beacon 20A, and the concrete discharge timing can be accurately grasped. It becomes possible.

This concrete placement management system 200 records time information regarding concrete transportation and placement according to the communication state between each beacon 20A and each receiving terminal 1A to 3A and changes in acceleration acting on each beacon. Each time information is recorded on the server 22 via the receiving terminals 1A to 3A. Next, an example of time information obtained from the communication record data of each of the receiving terminals 1A to 3A and the beacon 20A will be explained.

(a) Communication record between the receiving terminal 1A and the beacon 20A: Plant departure time and plant return time of the transport vehicle 10 When the receiving terminal 1A is installed near the mixer, the transport vehicle 10 is placed directly under the mixer while concrete is being mixed. It is on standby, and communication is always connected during this time. After the mixing is completed, concrete is put into the transport vehicle 10, and the transport vehicle 10 starts moving, thereby increasing the distance between the beacon 20A and the receiving terminal 1A, reducing the communication strength or disconnecting the communication. The plant departure time may specify either the time when the communication strength decreases or the time when the communication is disconnected. When the receiving terminal 1A is installed at the entrance of the plant 12, the time when communication with the beacon 20A is established is recorded as the plant departure time. On the other hand, the time when the transport vehicle 10 returns from the driving site 14 to the plant 12 and communication between the beacon 20A and the receiving terminal 1A is reconnected is recorded as the plant return time.

(b) Communication record between the receiving terminal 2A and the beacon 20A: time of arrival at the site and time of leaving the site When the receiving terminal 2A is installed at the gate of the entrance 16 of the driving site 14, the communication between the receiving terminal 2A and the beacon 20A is connected. Record the time as the time of arrival at the site. After discharging the concrete, when leaving the entrance 16 of the pouring site 14, the time when communication between the beacon 20A and the receiving terminal 2A is reconnected is recorded as the site exit time.

(c) Communication record between the receiving terminal 3A and the beacon 20A: Concrete pouring start and completion time When the receiving terminal 3A is installed near the hopper of the pump truck 18, the transport vehicle 10 discharges concrete to the pump truck 18. When approaching the pump truck 18 from the standby location, communication between the receiving terminal 3A and the beacon 20A is connected. As mentioned above, the drum of the transport vehicle 10 always rotates in a constant direction in order to keep the concrete within the drum until it is discharged. If the acceleration value sensed by the beacon 20A in this direction is defined as a positive value, the rotational direction of the drum is reversed when discharging concrete, so the acceleration value sensed by the beacon 20A at that time takes a negative value. With communication between the receiving terminal 3A and the beacon 20A being connected, the time when the sign of the acceleration value detected by the acceleration sensor is reversed is recorded as the time when pouring of concrete loaded on the transport vehicle 10 starts. After discharging the concrete, the rotational direction of the drum of the transport vehicle 10 is turned back to the normal direction. At that time, the sign of the acceleration value of the beacon 20A is reversed again. This time is recorded as the driving completion time. Note that high-speed rotation may be performed immediately before or after concrete discharge is started, and the placing start time and placing completion time may be recorded based on the change in acceleration in the direction perpendicular to the rotation axis at that time.

Communication record data between the receiving terminals 1A to 3A and the beacon 20A is stored in the server 22 from the receiving terminals 1A to 3A. The communication record data stored in the server 22 can be output to the staff terminal 24 held by the site staff. An example of output to the staff terminal 24 is shown in FIG.

The staff terminal 24 may perform arithmetic processing on the following items and display them as output. For example, the transport vehicle number (vehicle number assigned to each transport vehicle 10 (can also be a license plate)), the number of transport vehicles (the number of transport vehicles 10 that will arrive at the driving site 14), the scheduled arrival time at the site (the number of driving vehicles 10 that has been created in advance), In the design plan, the scheduled arrival time of the transport vehicle 10 at the site), the plant departure time, the return time (see (a) above), the site arrival time, the exit time (see (b) above), the driving start time, Driving completion time (see (c) above), transport time (time required from departure of each transport vehicle 10 to arrival at site), allowable driving time (allowable time for driving completion of each transport vehicle 10), next time Possible plant departure time (time at which the transport vehicle 10 that has returned to the plant 12 can then load concrete and leave the plant 12), site arrival delay time (between the scheduled arrival time of the transport vehicle 10 and the actual site arrival time) difference) etc.

Note that as a method for acquiring position information of the transport vehicle 10 from the plant 12 at the driving site 14, a well-known operation management system that acquires position information using positioning data from an artificial satellite can be utilized.

According to the second embodiment, time information regarding the transportation and pouring of concrete is recorded according to the communication state between each of the receiving terminals 1A to 3A and the beacon 20A and changes in the acceleration acting on the beacon 20A. , it is possible to reduce the time and effort required by humans to input time information. Therefore, it is possible to significantly save labor in time management of concrete transportation and pouring operations from mixing and producing concrete to pouring. Further, since time information regarding the transportation and pouring of concrete can be automatically and reliably recorded for all transport vehicles 10, it is possible to prevent omissions in recording. Furthermore, if driving is delayed due to traffic jams, troubles at the site, etc., and it becomes difficult to transport or drive within the allowable time, this information can be quickly and easily grasped.

As explained above, the concrete placement management system according to the present invention is a system for managing the transportation and placement of concrete, and includes a concrete plant that produces fresh concrete, a concrete placement site, and a concrete placement site. Wireless communication is established between a transmitting means installed at a predetermined location of each machine or equipment and a transport vehicle that transports concrete from the concrete plant to near the concrete placing machine or equipment at the pouring site. The present invention is equipped with a receiving means for communicating and a recording means for recording time information regarding transport and pouring of concrete according to the communication status between each transmitting means and the receiving means, thereby reducing the time and effort required by humans to input time information. This allows for significant labor savings in the time management of concrete transportation and pouring operations, from mixing and manufacturing concrete to pouring. In addition, since time information regarding concrete transportation and pouring can be automatically and reliably recorded for all transport vehicles, it is possible to prevent record omissions.

According to another concrete placement management system according to the present invention, it is a system for managing the transportation and placement of concrete, and includes a concrete plant for producing fresh concrete, a concrete placement site, a concrete placement machine, or Wireless communication is established between the receiving means installed at a predetermined location of each of the equipment and the receiving means installed on a transport vehicle that transports concrete from the concrete plant to the vicinity of the concrete placing machine or equipment at the pouring site. Since the present invention is equipped with a transmitting means for transmitting and a recording means for recording time information regarding transportation and pouring of concrete according to the communication status between each transmitting means and receiving means, it is possible to reduce the time and effort required by humans to input time information. , it is possible to significantly save labor in time management of concrete transportation and pouring operations, from mixing and manufacturing concrete to pouring. In addition, since time information regarding concrete transportation and pouring can be automatically and reliably recorded for all transport vehicles, it is possible to prevent record omissions.

Further, according to another concrete placement management system according to the present invention, the system further includes an acceleration detection means for detecting the acceleration acting on the transmitting means installed in the transport vehicle, and the recording means includes each transmitting means and the receiving means. According to the communication status between the two and the acceleration detected by the acceleration detection means, time information related to transporting and placing concrete is recorded, so changes in rotation of the drum of the transport vehicle when transitioning to placing can be detected by acceleration. This makes it possible to reliably record time information related to implantation.

Further, according to another concrete placement management system according to the present invention, since the system further includes an output means for outputting the recorded time information, the time information can be recorded quickly and easily using an output means such as a terminal held by a site staff member. can be grasped.

As described above, the concrete placement management system according to the present invention is useful for time management of concrete transportation and placement work, and is particularly suitable for significantly saving labor in time management.

1-3 Beacon (transmission means)
1A to 3A Receiving terminal (receiving means)
10 Transport vehicle 12 Concrete plant 14 Placement site 16 Entrance 18 Concrete pump truck (concrete placement machine or equipment)
20 Transport vehicle terminal (receiving means)
20A Beacon (transmission means)
22 Server (recording means)
24 Staff terminal (output means)
100,200 Concrete pouring management system

Claims (4)

A system for managing the transportation and pouring of concrete,
A concrete plant for producing fresh concrete, a concrete pouring site , and a transmitting means installed at predetermined locations of a concrete pouring machine or device, and the concrete pouring machine or the device from the concrete plant to the concrete pouring site . a receiving means that is installed on a transport vehicle that transports concrete to the vicinity of and performs wireless communication with each of the transmitting means; and a recording means for recording time information regarding driving ,
The time information includes a plant departure time, a plant return time, a site arrival time, a site exit time, a driving start time, and a driving completion time,
The plant departure time is the time when the communication strength between the transmitting means installed near the mixer of the concrete plant and the receiving means decreases or the communication is cut off, or the time when the communication between the transmitting means installed near the mixer of the concrete plant and the receiving means is cut off. is the time when communication with the receiving means is established;
The plant return time is the time when the transport vehicle returns from the pouring site to the concrete plant and communication between the transmitting means and the receiving means installed near the mixer or at the entrance of the concrete plant is reconnected. ,
The arrival time at the site is the time when communication is established between the transmitting means and the receiving means installed at the entrance of the driving site,
The site exit time is such that when the transport vehicle exits the entrance of the pouring site after discharging the concrete, communication between the transmitting means installed at the entrance of the pouring site and the receiving means is reconnected. is the time,
The placing start time is the time when communication is established between the transmitting means and the receiving means installed in the concrete placing machine or the equipment,
The placing completion time is the time when, after concrete is discharged, the transport vehicle leaves the concrete placing machine or the equipment, and communication between the transmitting means and the receiving means installed in the concrete placing machine or the equipment is cut off. A concrete placement management system characterized by : A system for managing the transportation and pouring of concrete,
A concrete plant for producing fresh concrete, a concrete placing site, a receiving means installed at a predetermined location of a concrete placing machine or equipment, and the concrete placing machine or the equipment from the concrete plant to the concrete placing site . a transmitting means that is installed on a transport vehicle that transports concrete to the vicinity of the concrete receiving means, and performs wireless communication with each of the receiving means; and a recording means for recording time information regarding driving ,
The time information includes a plant departure time, a plant return time, a site arrival time, a site exit time, a driving start time, and a driving completion time,
The plant departure time is the time when the communication strength between the receiving means installed near the mixer of the concrete plant and the transmitting means decreases or the communication is cut off, or the time when the communication between the receiving means installed near the mixer of the concrete plant and the transmitting means is cut off. is the time when communication with the transmission means is connected;
The plant return time is the time when the transport vehicle returns from the pouring site to the concrete plant and communication between the receiving means and the transmitting means installed near the mixer or at the entrance of the concrete plant is reconnected. ,
The arrival time at the site is the time when communication between the receiving means installed at the entrance of the driving site and the transmitting means is connected,
The site exit time is such that when the transport vehicle leaves the entrance of the pouring site after discharging the concrete, communication between the receiving means installed at the entrance of the pouring site and the transmitting means is reconnected. is the time,
The placing start time is the time when communication is established between the receiving means installed in the concrete placing machine or the equipment and the transmitting means,
The placing completion time is the time when, after concrete is discharged, the transport vehicle leaves the concrete placing machine or the equipment, and communication between the receiving means and the transmitting means installed in the concrete placing machine or the equipment is cut off. A concrete placement management system characterized by : Further comprising acceleration detection means for detecting acceleration acting on the transmission means installed in the transport vehicle,
3. The concrete according to claim 2, wherein the recording means records the time information according to the communication state between the transmitting means and the receiving means and the acceleration detected by the acceleration detecting means. Input management system. The concrete placement management system according to any one of claims 1 to 3, further comprising an output means for outputting the recorded time information.

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