Compaction management method, and holder

Abstract

To provide a compaction management method for concrete placement that can be implemented with a simpler configuration. [Solution] The compaction management method for concrete uses a vibrator for compacting concrete poured into a formwork, a single transmitter provided in or near the vibrator, and one or more receivers provided above the formwork for communicating with the transmitter, and includes an insertion / removal step of inserting and removing the vibrator and the transmitter from the concrete, a communication step performed in parallel with the insertion / removal step, which is a communication step of attempting to communicate between the one or more receivers and the transmitter, and a position identification step performed at a state change point which is at least one of the time immediately before the time when the communication is interrupted and the time when the communication is restored, which is a position identification step of identifying the position of the transmitter relative to the one or more receivers according to the communication result in the communication step.

Description

Technical Field

[0001] The present invention relates to a tightening management method and a holder for a transmitter provided in a vibrator for compacting concrete.

Background Art

[0002] Patent Document 1 describes a concrete compaction management device and a concrete compaction management method. Patent Document 2 describes a concrete driving management system. In these compaction management or driving management, a rod-shaped vibrator is used to compact concrete. A transmitter is provided in the vibrator, and a receiver for receiving a signal emitted by the transmitter is provided at a location away from the transmitter. In these compaction management or driving management, when the receiver receives a signal, the transmitter is determined not to be buried in the concrete, and when the receiver does not receive a signal, the transmitter is determined to be buried in the concrete.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In these compaction management or driving management, in order to identify the position of the vibrator even when the vibrator is buried in the concrete, a second transmitter different from the transmitter (first transmitter) provided in the vibrator is provided above the first transmitter. The position where the second transmitter is provided is determined such that the second transmitter is not buried even when the vibrator and the first transmitter are buried in the concrete.

[0005] However, a management method that uses a total of two transmitters—one to determine whether the vibrator is embedded in concrete and another to locate the vibrator—can be considered redundant.

[0006] One aspect of the present invention has been made in view of the above-mentioned problems, and its object is to provide a compaction management method that can be implemented with a simpler configuration in a method for managing compaction associated with concrete placement. [Means for solving the problem]

[0007] To solve the above problems, a concrete compaction management method according to one aspect of the present invention is a concrete compaction management method using a vibrator for compacting concrete poured into a formwork, a single transmitter provided in or near the vibrator, and one or more receivers provided above the formwork for communicating with the transmitter, comprising: an insertion and removal step of inserting and removing the vibrator and the transmitter from the concrete; a communication step performed in parallel with the insertion and removal step, wherein the method attempts to communicate between the one or more receivers and the transmitter; and a position identification step performed at a state change point, which is at least one of the time immediately before the point of interruption when the communication is interrupted and the time of recovery when the communication is restored, wherein the position of the transmitter relative to the one or more receivers is identified according to the communication result in the communication step.

[0008] To solve the above problems, a holder according to one aspect of the present invention is a holder for fixing a transmitter to a vibrator used to compact concrete poured into a formwork, comprising a resin case for housing the transmitter in a sealed state, and a fixing part for fixing the case to the vibrator. [Effects of the Invention]

[0009] According to one aspect of the present invention, a compaction management method for concrete placement can be provided that can be implemented with a simpler configuration. [Brief explanation of the drawing]

[0010] [Figure 1] This is a flowchart showing the flow of the compaction management method according to Embodiment 1 of the present invention. [Figure 2] This is a cross-sectional view of concrete and formwork illustrating a compaction control method according to Embodiment 1 of the present invention. [Figure 3] This is a cross-sectional view of concrete and formwork illustrating a compaction control method according to Embodiment 1 of the present invention. [Figure 4] This figure shows an example of the structure of a holder according to Embodiment 2 of the present invention. [Figure 5] This figure shows an example of the configuration of a holder according to Embodiment 2 of the present invention. [Figure 6] This figure shows an example of the configuration of a holder according to Embodiment 2 of the present invention. [Figure 7] This figure shows an example of the configuration of a holder according to Embodiment 2 of the present invention. [Figure 8] This figure shows an example of the configuration of a holder according to Embodiment 2 of the present invention. [Modes for carrying out the invention]

[0011] [Embodiment 1] The following describes one embodiment of the present invention.

[0012] (Overview of Compaction Management Method M10) The compaction management method M10 according to this embodiment is a concrete compaction management method that uses a vibrator for compacting concrete poured into formwork, a single transmitter provided in or near the vibrator, and one or more receivers that communicate with the transmitter and are provided above the formwork.

[0013] The transmitter according to this embodiment transmits radio waves that can be received by the receiver. The radio waves transmitted by the transmitter may include, for example, a time stamp. Note that the radio waves transmitted by the transmitter are blocked by concrete. The transmitter may be driven using a power source such as a battery, for example. A specific example of the transmitter is a communication tag.

[0014] For example, the transmitter may be provided on the vibrator. Also, for example, the transmitter may be provided near the vibrator, such as on a cable connected to the vibrator. Further, for example, the transmitter may be integrated with the vibrator by being built into the vibrator.

[0015] The receiver according to this embodiment receives the radio waves transmitted by the transmitter. The receiver may calculate, for example, the distance between the transmitter and the receiver using the radio waves transmitted by the transmitter.

[0016] Here, between one or more receivers and the transmitter, as an example, communication is performed using frequencies in UWB (Ultra Wide Band). According to the above configuration, the accuracy of specifying the position of the transmitter with respect to the receiver can be improved.

[0017] (Flow of tightening management method M10) The flow of the tightening management method M10 will be described with reference to FIG. 1. FIG. 1 is a flowchart showing the flow of the tightening management method M10. As shown in FIG. 1, the tightening management method M10 includes an insertion / removal step S11, a communication step S12, a position specifying step S13, a position recording step S14, an interruption period specifying step S15, and an interruption period recording step S16.

[0018] (Insertion / removal step S11) The insertion / removal step S11 is a step of inserting and removing the vibrator and the transmitter with respect to the concrete. The insertion / removal step S11 may be performed by, for example, an operator or the like.

[0019] (Communication step S12) Communication process S12 is performed in parallel with the plugging / unplugging process S11, and is a process in which communication is attempted between one or more receivers and a transmitter. In communication process S12, for example, the receiver may be kept in a state where it can constantly receive radio waves emitted by the transmitter.

[0020] (Location identification step S13) The position determination process S13 is performed at the state change point, which is at least one of the following points: the time immediately before the communication interruption and the time when communication is restored. This process determines the position of the transmitter relative to one or more receivers according to the communication results in the communication process S12.

[0021] Figure 2 is a cross-sectional view of concrete and formwork illustrating the compaction control method M10. Figure 2 also shows the transitions between states ST1 to ST4 as the vibrator V compacts the concrete CO during the compaction control method M10. The compaction control device 10, which implements the compaction control method M10, will be described below with reference to Figure 2. As shown in Figure 2, the compaction control device 10 comprises a vibrator V for compacting the concrete CO poured into the formwork F, a single transmitter 11 located near the vibrator V, and a receiver 12 located above the formwork that communicates with the transmitter 11. As shown in Figure 2, the concrete CO is poured into the formwork F from a concrete pump or the like, creating a mound. The vibrator V is inserted into the mound of concrete CO. The transmitter 11 is located on a cable CA connected to the vibrator V. The transmitter 11 is located near the vibrator V. Here, each of the one or more receivers according to this embodiment may be a single receiver 12 provided directly above the vibrator V and the transmitter 11, for example, as shown in Figure 2. In this case, during the insertion / removal process S11, the vibrator V and the transmitter 11 are moved back and forth along the vertical direction, for example, as shown in states ST1 to ST4. Also, during states ST1 to ST4, the communication process S12 is performed in parallel with the insertion / removal process S11. That is, during states ST1 to ST4, communication between the receiver 12 and the transmitter 11 is attempted.

[0022] Figure ST1 shows the state when compaction of concrete CO by the vibrator V begins. That is, ST1 is the state just before the transmitter 11 is embedded in concrete CO as the vibrator V is inserted into concrete CO. At this time, communication between the transmitter 11 and the receiver 12 is normal. In state ST1, the vibrator V is inserted deeper into concrete CO as it vibrates, compacting the concrete CO. When the transmitter 11 is inserted into concrete CO together with the vibrator V, communication between the transmitter 11 and the receiver 12 is interrupted. Here, at the time just before the interruption of communication between the transmitter 11 and the receiver 12, i.e., at state ST1, the position determination process S13 determines the distance between the transmitter 11 and the receiver 12 according to the communication result. Then, the position of the transmitter 11 relative to the receiver 12 is determined. Note that the position of the transmitter 11 relative to the receiver 12 may be indicated, for example, by the height of the concrete CO being poured.

[0023] ST2 is a diagram showing the state when the concrete CO is being compacted after state ST1. At this time, as described above, the transmitter 11 is embedded in the concrete CO, and communication between the transmitter 11 and the receiver 12 is interrupted. Even after state ST2, the vibrator V continues to vibrate in the concrete CO, compacting the concrete CO and decreasing the height of the concrete CO being poured.

[0024] Figure ST3 shows the state when the transmitter 11 is exposed outside the concrete CO in state ST2 or later. In state ST2 or later, as a result of the height of the concrete CO being poured decreasing, the transmitter 11 is exposed outside the concrete CO as shown in ST3. At this time, communication between the transmitter 11 and the receiver 12 is restored. Here, even at the time of restoration when communication between the transmitter 11 and the receiver 12 is restored, i.e., state ST3, the position determination process S13 determines the distance between the transmitter 11 and the receiver 12 according to the communication result. Then, the position of the transmitter 11 relative to the receiver 12 is determined, and the height of the concrete CO being poured is determined. Even in state ST3 or later, the work of compacting the concrete CO may be continued according to the state of the concrete CO.

[0025] ST4 is a diagram showing the state when the concrete CO is being compacted from state ST3 onwards. At this time, as shown in ST4, the transmitter 11 is embedded in the concrete CO together with the vibrator V, and communication between the transmitter 11 and the receiver 12 is interrupted. Subsequently, the position of the transmitter 11 relative to the receiver 12 is determined when the transmitter 11 is exposed outside the concrete CO.

[0026] As an example, the vibrator V may be made to follow changes in the height of the concrete CO so that the transmitter 11 is buried directly below the top surface of the concrete CO. With this configuration, the position of the transmitter 11 can be determined in a timely manner in accordance with changes in the height of the concrete CO.

[0027] As an example, the insertion and removal of the vibrator V may be adjusted to follow changes in the height of the concrete CO, and the transmitter 11 may be intentionally created to be embedded in the concrete CO and exposed outside the concrete CO. With this configuration, the position of the transmitter 11 can be determined at any given time.

[0028] With the above configuration, only one transmitter is needed to determine whether the vibrator is embedded in the concrete and to locate its position during concrete compaction management or placement management. Therefore, a compaction management method that can be implemented with a simpler configuration is available for concrete placement.

[0029] Furthermore, with each of the above configurations, the location of the transmitter can be determined even if there is only one receiver.

[0030] (Location recording process S14) The location recording step S14 is a step performed after the location identification step S13, and is a step in which a timestamp corresponding to the time of state change and the location identified by the location identification step S13 at the time of state change are recorded in association.

[0031] One example of a state change point is time t1 in state ST1, which is the time immediately before the communication between the transmitter 11 and the receiver 12 is interrupted. Here, h(t1) in ST1 corresponds to the height of the concrete CO being poured, i.e., the position of the transmitter 11, at time t1. Another example of a state change point is time t2 in state ST3, which is the time when communication between the transmitter 11 and the receiver 12 is restored. Here, h(t2) ​​in ST3 corresponds to the height of the concrete CO being poured, i.e., the position of the transmitter 11, at time t2. Note that the value of h(t2) ​​is smaller than the value of h(t1).

[0032] According to the above configuration, it is possible to control the change in concrete height over time due to compaction.

[0033] (Process S15 for specifying the interruption period) The interruption period identification step S15 is a step in which the period during which communication was interrupted is identified based on the communication results. An example of an interruption period is the period between the above-mentioned points t1 and t2.

[0034] (Interruption period recording process S16) The interruption period recording step S16 is a step that records, in association with the timestamp corresponding to the time immediately preceding the start of the interruption period, the position identified by the position identification step S13 at that time immediately preceding, the timestamp corresponding to the recovery time immediately following the end of the interruption period, and the position identified by the position identification step S13 at that recovery time. As an example, in the interruption period recording step S16, the timestamp corresponding to the time immediately preceding the start of the interruption period, i.e., time t1, the position h(t1) of the transmitter 11 identified by the position identification step S13 at time t1, the timestamp corresponding to the recovery time immediately following the end of the interruption period, i.e., time t2, and the position h(t2) ​​identified by the position identification step S13 at time t2 are recorded.

[0035] With the above configuration, it is possible to control the time the vibrator is compacting the concrete.

[0036] (Other configuration examples for the compaction control device 10) Other configuration examples of the compaction control device 10 will be described with reference to Figure 3. Figure 3 is a cross-sectional view of concrete and formwork illustrating the compaction control method M10, similar to Figure 2. However, unlike Figure 2, Figure 3 also shows a configuration example in which the compaction control device 10 is equipped with multiple receivers 12. Each of the one or more receivers according to this embodiment may be, for example, multiple receivers 12 provided at known positions in a predetermined coordinate system, as shown in Figure 3. For example, the multiple receivers 12 may be provided above the formwork F, as shown in Figure 3. In the insertion / removal process S11 in this configuration example, the vibrator V and transmitter 11 may be inserted and removed in any direction, including directions other than the vertical.

[0037] In the communication process S12, an attempt is made to communicate between each of the multiple receivers 12 and the transmitter 11. In the position determination process S13, the position of the transmitter 11 relative to the multiple receivers 12 is determined in a predetermined coordinate system according to the communication results. For example, in the position determination process S13, the distance between each of the multiple receivers 12 and the position of the transmitter 11 may be determined, and the position of the transmitter 11 may be determined in a predetermined coordinate system using trigonometry or the like.

[0038] With the above configuration, the position of the transmitter can be determined even if the vibrator is inserted or removed in any direction, including directions other than the vertical.

[0039] (Summary of processing results in compaction management method M10) Furthermore, the processing results in each of the steps S11 to S16 described above may be aggregated and centrally managed on an external device, such as a computer connected to the receiver 12 via a wired or wireless network.

[0040] [Embodiment 2] Other embodiments of the present invention are described below. For the sake of clarity, components having the same function as those described in the above embodiments will be denoted by the same reference numerals, and their descriptions will not be repeated.

[0041] (Overview of Holder 20) The holder 20 according to this embodiment is a holder for fixing the transmitter 11 to a vibrator V that compacts the concrete CO poured into the formwork F. Here, the holder 20 comprises a resin case that houses the transmitter 11 in a sealed state, and a fixing part that fixes the case to the vibrator V.

[0042] (Example configuration of holder 20) An example configuration of holder 20 will be explained with reference to Figures 4 to 6.

[0043] Figure 4 shows an example of the structure of holder 20. The lower left of Figure 4 is a front view of holder 20. The upper left of Figure 4 is a plan view of holder 20. The upper center of Figure 4 is a cross-sectional view of holder 20. The cross section shown in this section is indicated by the dashed line AA on the plan view of holder 20. The upper right of Figure 4 is a perspective view of holder 20. The lower right of Figure 4 is an exploded view of holder 20. Figure 5, which will be described later, corresponds to the exploded view of holder 20 among the drawings included in Figure 4.

[0044] Each component of the holder 20 will be described with reference to Figure 5. Figure 5 is an exploded view of the holder 20, showing each component of the holder 20. As an example, the holder 20 includes a main body 21, a lid 22, a packing 23, a fixing part 24, a first connecting shaft 25, a first fastener 26, an anti-slip material 27, a second connecting shaft 28, and an insert screw 29, as shown in Figure 5.

[0045] The main body 21 and the lid 22 house the transmitter 11. In other words, the main body 21 and the lid 22 constitute a case for housing the transmitter 11.

[0046] The materials that make up the case preferably have water resistance to moisture contained in concrete, impact resistance to aggregates such as gravel and reinforcing bars, and heat resistance to high temperatures caused by the heat of hydration of concrete. Specifically, the case is made of at least one of ABS resin, butadiene rubber, and silicone rubber. With the above configuration, the transmitter can be protected from the environment inside the concrete.

[0047] Furthermore, the surface of the material may be treated to reduce adhesion to concrete. Specific examples of treatment agents used in this treatment include paraffin wax and fluororesin coating agents. This prevents the adhesion of cement paste and mortar in the concrete, thereby maintaining good communication status for the transmitter 11.

[0048] The gasket 23 is a seal for sealing the case. For example, the gasket 23 may be made of a waterproof material such as silicone rubber.

[0049] The fixing part 24 secures the case to the vibrator V. The first connecting shaft 25 movably connects the fixing part 24 and the main body part 21 that constitutes the case. In other words, the fixing part 24 is movably connected to the case at one end via the first connecting shaft 25.

[0050] The first fastener 26 secures the case to the fixed part 24 attached to the vibrator V. Here, the holder 20 is equipped with the first fastener 26 at one end and the opposite end as described above.

[0051] The anti-slip material 27 is a material for preventing the holder 20 from slipping relative to the vibrator V. In other words, the anti-slip material 27 is a material that prevents the mounting position of the holder 20 relative to the vibrator V from shifting. Here, the fixing part 24 and the case are equipped with the anti-slip material 27 on the mounting surface to the vibrator V. A specific example of the anti-slip material 27 is a sheet-shaped material made of a rubber-based material or the like.

[0052] The second connecting shaft 28 movably connects the first fastener 26 and the main body 21 that constitutes the case.

[0053] The insert screw 29 secures the main body 21 and the lid 22 to each other.

[0054] The holder 20 may also be attached near the vibrator V, for example, on the cable CA connected to the vibrator V.

[0055] Furthermore, the holder 20 may be attached to any position on the vibrator V, for example. In this case, the holder 20 and the vibrator V may be connected via a member that absorbs vibrations from the vibrator V, such as an air damper or a gel damper.

[0056] Figure 6 is an image showing a part of the holder 20. As shown in Figure 6, the main body 21 and the fixing part 24 may be rotatably connected about the first connecting shaft 25 as the central axis. Also, as shown in Figure 6, the main body 21 and the first fastener 26 may be rotatably connected about the second connecting shaft 28 as the central axis. Here, for example, the main body 21 and the fixing part 24 may be fixed or released by rotating the first fastener 26 about the second connecting shaft 28 as the central axis.

[0057] The above configuration allows for the protection of equipment used to manage the compaction process during concrete placement.

[0058] Furthermore, with the above configuration, the holder attached to the vibrator can be fixed and released with a simple mechanism.

[0059] (Other configuration examples for holder 20) Other configuration examples of the holder 20 will be explained with reference to Figures 7 and 8. Figures 7 and 8 both show the holder 20 fixed to the cable CA of the vibrator V.

[0060] Figure 7 shows an example configuration of a holder 20 that includes a second fastener 30 instead of an insert screw 29 for fixing the main body 21 and the lid 22.

[0061] As described above, the case of the holder 20 comprises a main body 21 that houses the transmitter 11 and a lid 22. The second fastener 30 secures the main body 21 and the lid 22 in a sealed state. Here, the second fastener 30 may have a structure that allows the case to be secured by sliding it against the case, for example.

[0062] Figure 8 shows the case with the second fastener 30 removed. For example, as shown in Figure 8, the fixing between the main body 21 and the lid 22 may be released by sliding the second fastener 30. Here, for example, as shown in Figure 8, there may be a structure in which multiple second fasteners 30 fix the case from multiple sides.

[0063] With the above configuration, the case can be easily secured and released in a sealed state.

[0064] [Additional Notes] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

[0065] 〔summary〕 A compaction management method according to Embodiment 1 of the present invention is a concrete compaction management method using a vibrator for compacting concrete poured into a formwork, a single transmitter provided in or near the vibrator, and one or more receivers provided above the formwork for communicating with the transmitter, comprising: an insertion and removal step of inserting and removing the vibrator and the transmitter from the concrete; a communication step performed in parallel with the insertion and removal step, wherein the communication step attempts to communicate between the one or more receivers and the transmitter; and a position identification step performed at a state change point, which is at least one of the time immediately before the point of interruption when the communication is interrupted and the time of recovery when the communication is restored, wherein the position identification step identifies the position of the transmitter relative to the one or more receivers according to the communication result in the communication step.

[0066] With the above configuration, only one transmitter is needed to determine whether the vibrator is embedded in the concrete and to locate its position in concrete compaction management or placement management. Therefore, a compaction management method that can be implemented with a simpler configuration can be provided for concrete placement.

[0067] In the compaction control method according to aspect 2 of the present invention, in addition to the configuration of the compaction control method according to aspect 1, the one or more receivers are a single receiver provided directly above the vibrator and the transmitter, the insertion / removal step causes the vibrator and the transmitter to reciprocate along the vertical direction, and the position identification step identifies the distance of the transmitter to the receiver according to the communication result.

[0068] With the above configuration, the location of the transmitter can be determined even if there is only one receiver.

[0069] In the compaction management method according to aspect 3 of the present invention, in addition to the configuration of the compaction management method according to aspect 1, each of the one or more receivers is a plurality of receivers provided at known positions in a predetermined coordinate system, the communication step attempts to communicate between each of the plurality of receivers and the transmitter, and the position identification step identifies the position of the transmitter relative to the plurality of receivers in the predetermined coordinate system according to the communication result.

[0070] With the above configuration, the position of the transmitter can be determined even if the vibrator is inserted or removed in any direction, including directions other than the vertical.

[0071] In the compaction management method according to aspect 4 of the present invention, in addition to the configuration of the compaction management method according to any one of aspects 1 to 3 described above, the method further includes a position recording step performed after the position identification step, which records a timestamp corresponding to the state change time and the position identified by the position identification step at the state change time in association with each other.

[0072] According to the above configuration, it is possible to control the change in concrete height over time due to compaction.

[0073] The compaction management method according to aspect 5 of the present invention further includes, in addition to the configuration of the compaction management method according to any one of aspects 1 to 4 above, an interruption period identification step that identifies the period of interruption during which communication was interrupted according to the communication result, and an interruption period recording step that records in association the following: a timestamp corresponding to the time immediately preceding the start of the interruption period, the location identified by the location identification step at the time immediately preceding the interruption, a timestamp corresponding to the recovery time immediately following the end of the interruption period, and the location identified by the location identification step at the recovery time.

[0074] With the above configuration, it is possible to control the time the vibrator is compacting the concrete.

[0075] In the compaction management method according to aspect 6 of the present invention, in addition to the configuration of the compaction management method according to any one of aspects 1 to 5 above, communication is performed between the one or more receivers and the transmitter using UWB frequencies.

[0076] The above configuration improves the accuracy with which the receiver can determine the location of the transmitter.

[0077] A holder according to aspect 7 of the present invention is a holder for fixing a transmitter to a vibrator used to compact concrete poured into a formwork, comprising a resin case for housing the transmitter in a sealed state, and a fixing part for fixing the case to the vibrator.

[0078] The above configuration allows for the protection of equipment used to manage the compaction process during concrete placement.

[0079] In the holder according to embodiment 8 of the present invention, in addition to the configuration of the holder according to embodiment 7, the fixing portion is movably connected to the case at one end via a connecting shaft, and a first fastener for fixing the fixing portion and the case attached to the vibrator is further provided at the end opposite to the one end, and the fixing portion and the case are provided with an anti-slip material on the mounting surface to the vibrator.

[0080] With the above configuration, the holder attached to the vibrator can be fixed and released with a simple mechanism.

[0081] In the holder according to embodiment 9 of the present invention, in addition to the configuration of the holder according to embodiment 7 or 8, the case is made of at least one of ABS resin, butadiene rubber, and silicone rubber.

[0082] According to the above configuration, the transmitter can be protected from the environment within the concrete.

[0083] In the holder according to aspect 10 of the present invention, in addition to the configuration of the holder according to any one of aspects 7 to 9 above, the case further comprises a main body portion and a lid for housing the transmitter, and a second fastener for fixing the main body portion and the lid in a sealed state.

[0084] With the above configuration, the case can be easily secured and released in a sealed state. [Explanation of symbols]

[0085] 10 Compaction control device 11 Transmitter 12 receivers 20 holders 21 Main body 22 Lid 23 Gasket 24 Fixed part 25 First connecting shaft 26 First fastener 27 Anti-slip material 28. Second connection axis 29 Insert screws 30 Second fastener

Claims

1. A concrete compaction management method using a vibrator for compacting concrete poured into formwork, a single transmitter provided in or near the vibrator, and one or more receivers provided above the formwork for communicating with the transmitter, wherein The process of inserting and removing the vibrator and the transmitter into and out of the concrete, A communication process performed in parallel with the insertion / removal process, comprising a communication process in which one or more receivers attempt to communicate with the transmitter, A location identification step performed at a state change point, which is at least one of the following points: the time immediately preceding the time when the communication was interrupted, and the time when the communication was restored, the location identification step which identifies the position of the transmitter relative to the one or more receivers according to the communication result in the communication step, Compaction management methods.

2. The one or more receivers are a single receiver located directly above the vibrator and the transmitter. The insertion and removal process involves reciprocating the vibrator and the transmitter along the vertical direction. The position determination step determines the distance of the transmitter to the receiver according to the communication result. The compaction management method described in claim 1.

3. Each of the one or more receivers is a plurality of receivers located at known positions in a predetermined coordinate system. The communication process attempts to communicate between each of the plurality of receivers and the transmitter. The position determination step involves determining the position of the transmitter relative to the plurality of receivers in the predetermined coordinate system according to the communication result. The compaction management method described in claim 1.

4. A location recording step performed after the location identification step, further comprising a location recording step that records a timestamp corresponding to the state change time and the location identified by the location identification step at the state change time in association with each other. A compaction management method according to any one of claims 1 to 3.

5. A process for identifying the interruption period during which the communication was interrupted, based on the aforementioned communication results, The system further includes an interruption period recording step that records, in association with a timestamp corresponding to the point in time immediately preceding the start of the interruption period, the position identified by the position identification step at that point in time, a timestamp corresponding to the recovery point immediately following the end of the interruption period, and the position identified by the position identification step at that recovery point. The compaction management method described in claim 4.

6. Communication is performed between the one or more receivers and the transmitter using frequencies in UWB. A compaction management method according to any one of claims 1 to 3.

7. A holder for fixing a transmitter to a vibrator used to compact concrete poured into formwork, A resin case for housing the aforementioned transmitter in a sealed state, The vibrator is equipped with a fixing part for fixing the case, holder.

8. The fixed portion is movably connected to the case at one end via a connecting shaft, A first fastener for securing the fixed part attached to the vibrator and the case is further provided at one end and the opposite end, The aforementioned fixing part and the aforementioned case are equipped with an anti-slip material on the mounting surface to the vibrator. The holder according to claim 7.

9. The case is made of at least one of ABS resin, butadiene rubber, and silicone rubber. The holder according to claim 7 or 8.

10. The case comprises a main body and a lid for housing the transmitter. The system further includes a second fastener for securing the main body and the lid in a sealed state. The holder according to claim 7 or 8.

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