Construction management system

Abstract

To enable influences on a peripheral ground and peripheral buildings around a construction site by construction to be evaluated.SOLUTION: A construction management system includes a detection unit 2 to be installed at a construction site or a ground adjacent to the construction site, and a management terminal 1 for acquiring a detection value transmitted from the detection unit 2, the management terminal 1 includes setting information transmission means for transmitting setting information to the detection unit 2, the setting information includes operation period designation information for designating an operation period of the detection unit 2, and the detection unit 2 includes a radio communication part 25 for communicating with the management terminal 1, a battery 22 for supplying power to the radio communication part 25, setting information acquisition means for acquiring the setting information, and operation state switching means for turning on the power supply to the radio communication part 25 when it is within the designated operation period and turning off the power supply to the radio communication part 25 when it is outside the operation period.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a construction management system.

Background Art

[0002] In performing construction work such as civil engineering and building construction, as a technique for preventing adverse effects on the surrounding ground and surrounding buildings due to construction, it is known to install sheet piles disclosed in Patent Document 1 between the construction site and the surroundings.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The technique disclosed in Patent Document 1 is for preventing adverse effects on the surrounding ground and surrounding buildings due to construction, but there is also a desire to detect the effects on the surrounding ground and surrounding buildings due to construction.

[0005] Therefore, an object of the present disclosure is to provide a construction management system capable of evaluating the effects on the surrounding ground and surrounding buildings due to construction.

Means for Solving the Problems

[0006] In one aspect, the following solution means is provided. A detection unit installed at a construction site or adjacent to the construction site, and A management terminal that acquires the detection value transmitted from the detection unit, The management terminal includes setting information transmission means for transmitting setting information of the detection unit, The setting information includes operation period designation information for designating the operation period of the detection unit, The detection unit, A communication unit that communicates with the management terminal; A battery that supplies power to the communication unit; Setting information acquisition means for acquiring the setting information; An operation state switching means for turning on the power supply to the communication unit during the specified operation period and turning off the power supply to the communication unit outside the operation period.

Effects of the Invention

[0007] According to the present disclosure, it becomes possible to evaluate the influence on the surrounding ground and surrounding buildings due to construction.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

[0010] <Configuration of Construction Management System> As shown in FIG. 1, the construction management system S according to the embodiment of the present invention includes a management terminal 1, a detection unit 2, and another terminal 3.

[0011] The management terminal 1 is a communication terminal such as a smartphone. For example, the manager at the construction site is the user. A dedicated application (construction management application) is installed on the management terminal 1 of this embodiment, and the user can connect to, set, and acquire data from the detection unit 2 based on the operation of the dedicated application.

[0012] Another terminal 3 is a communication terminal such as a smartphone. For example, workers at the construction site, construction companies, clients, etc. are the users. Another terminal 3 receives the management information transmitted by the management terminal 1 via the Internet 4.

[0013] The detection unit 2 is installed at the construction site or adjacent to the construction site, and detects the inclination value (detection value) of the installation location, etc. The installation location of the detection unit 2 is, for example, a sheet pile or pile at the boundary between the construction site and the adjacent area, a building adjacent to the construction site, etc.

[0014] As shown in FIG. 2, the detection unit 2 includes a control unit 21, a battery 22, an angle measurement unit 23, a temperature measurement unit 24, a wireless communication unit 25 (communication unit), and a storage unit 26.

[0015] The control unit 21 is composed of an integrated arithmetic circuit such as a microcomputer equipped with an input / output interface, a CPU, a ROM, a RAM, and an RTC (Real Time Clock). By executing a predetermined program, the control unit 21 controls the operations of the battery 22, the angle measurement unit 23, the temperature measurement unit 24, the wireless communication unit 25, and the storage unit 26 and acquires information. The RTC realizes a time synchronization function for recognizing the time (including date and day of the week) and an alarm function for recognizing a specified time.

[0016] The battery 22 consists of, for example, a dry battery and supplies power for operating the detection unit 2. The control unit 21 can measure the remaining battery level by using an AD conversion function.

[0017] The angle measurement unit 23 consists of, for example, an IMU (Inertial Measurement Unit), measures the three-axis acceleration X, acceleration Y, acceleration Z, and the three-axis angular velocities X, Y, and Z, and outputs them to the control unit 21.

[0018] The temperature measurement unit 24 consists of, for example, a temperature sensor, measures the temperature of the detection unit 2, and outputs it to the control unit 21.

[0019] The wireless communication unit 25 performs wireless communication with the management terminal 1 using a communication method such as BLE (Bluetooth Low Energy).

[0020] The storage unit 26 is configured by using a rewritable non-volatile memory such as an EEPROM. The information stored in the storage unit 26 includes information for each detection unit 2 set at the time of factory shipment, information (setting information) set from the management terminal 1, information set by the operation of the detection unit 2, measurement data acquired by measurement, and information calculated after measurement.

[0021] The information for each detection unit 2 set at the time of factory shipment includes, for example, a correction coefficient X for temperature characteristics, a correction coefficient Y for temperature characteristics, and a correction coefficient Z for temperature characteristics, which are set at the time of factory shipment. The correction coefficient X for temperature characteristics, the correction coefficient Y for temperature characteristics, and the correction coefficient Z for temperature characteristics are correction coefficients for the three-axis accelerations X, Y, and Z of the angle measurement unit 23 whose output value changes according to temperature changes. Since they are different for each individual of the angle measurement unit 23, they are calculated in advance. The calculation method is, for example, to output a certain number of the accelerations X, Y, and Z at -20°C, 20°C, and 60°C with the angle measurement unit 23 fixed. Then, an approximation curve is calculated for the average values of the accelerations X, Y, and Z for each temperature, and the slopes of the approximation curve are taken as the correction coefficient X for temperature characteristics, the correction coefficient Y for temperature characteristics, and the correction coefficient Z for temperature characteristics.

[0022] The information set from the management terminal 1 includes, for example, a measurement interval, an installation direction, and an operation period (operation period specification information). The measurement interval sets, in minutes, the interval at which the detection unit 2 measures the tilt angles X and Y. The installation direction is set according to the installation direction of the detection unit 2, and a value that can identify whether it is horizontal or vertical is set. The operation period sets the time zone and day of the week during which the wireless communication unit 25 operates. For example, the information regarding the operation period stored in the storage unit 26 includes an operation time specification state (specification presence / absence information), an operation start time (operation start time information), an operation end time (operation end time information), and an operation day of the week (operation day of the week information). The operation time specification state indicates the presence or absence of the specification of the operation period. The operation start time specifies the start time of the operation period. The operation end time specifies the end time of the operation period. The operation day of the week specifies the day of the week for the operation period.

[0023] The information set by the operation of the detection unit 2 includes, for example, the tilt angle X and the tilt angle Y measured as offset values.

[0024] The measurement data obtained by measurement includes, for example, the measurement date and time, the tilt angle X, the tilt angle Y, and the temperature.

[0025] The information calculated after measurement includes, for example, the measurement time. The measurement time is for specifying the next tilt measurement time, and is calculated by adding the measurement interval to the time at the end of the tilt measurement.

[0026] <Functional Configuration of Detection Unit and Management Terminal> The detection unit 2 (control unit 21) includes a plurality of functional configurations realized by the cooperation of hardware and software. The plurality of functional configurations include a tilt value acquisition means, a measurement time information acquisition means, a temperature value acquisition means, a tilt value correction means, a tilt value storage means, a tilt value transmission means, a setting information acquisition means, and an operation state switching means.

[0027] The tilt value acquisition means acquires the tilt value measured (detected) by the angle measurement unit 23. For example, the tilt value acquisition means in this embodiment acquires the tilt value measured by the angle measurement unit 23 every specified time (for example, every 30 minutes) set from the management terminal 1.

[0028] The measurement time information acquisition means acquires the measurement time information (including the measurement date and time) of the tilt value by the angle measurement unit 23.

[0029] The temperature value acquisition means acquires the temperature value measured (detected) by the temperature measurement unit 24. For example, the temperature value acquisition means in this embodiment acquires the temperature value at the same timing when the tilt value acquisition means acquires the tilt value.

[0030] The tilt value correction means corrects the tilt value acquired at the same timing based on the temperature value acquired by the temperature value acquisition means. The temperature characteristic correction coefficient X, the temperature characteristic correction coefficient Y, and the temperature characteristic correction coefficient Z described above are used in this correction process.

[0031] The tilt value storage means stores the acquired tilt value and the like in the storage unit 26 every time the tilt value acquisition means acquires the tilt value from the tilt measurement unit 23. For example, the tilt value storage means in this embodiment stores the acquired tilt value, temperature value, and corrected tilt value associated with the measurement date and time in the storage unit 26.

[0032] The inclination value transmission means transmits the inclination value and the like stored in the data holding unit to the management terminal 1. For example, the inclination value transmission means in this embodiment transmits the measurement date and time, the corrected inclination value, the temperature value, etc. stored in the storage unit 26 to the management terminal 1 in response to a data transmission request from the management terminal 1.

[0033] The setting information acquisition means acquires the setting information transmitted by the management terminal 1 via the wireless communication unit 25. The acquired setting information includes the aforementioned measurement interval, the installation direction, and the operation period, and is stored in the storage unit 26.

[0034] The operation state switching means switches the operation state of the wireless communication unit 25 based on the operation period designation information included in the setting information. As a result, the power supply of the wireless communication unit 25 is turned on during the designated operation period, but the power supply is turned off outside the operation period.

[0035] According to such a detection unit 2, since the measured inclination value is stored in its own storage unit 26, it is possible to prevent loss of measurement data even if troubles such as communication failures occur between the management terminal 1. Further, since the detection unit 2 corrects the measured inclination value based on the temperature value, it is possible to suppress measurement errors due to temperature. Further, since the detection unit 2 acquires the measurement time information of the inclination value and stores the inclination value in association with the measurement time information, it is possible to store accurate time-series data. Further, since the detection unit 2 acquires and stores the inclination value every specified time, it is possible to record changes in the inclination value with high accuracy. Further, since the detection unit 2 transmits the measurement data in response to a data transmission request from the management terminal 1, compared with the case of transmitting the measurement data from the detection unit 2 in real time, the communication time can be reduced and the power consumption can be suppressed.

[0036] Furthermore, since the detection unit 2 switches the operating state of the wireless communication unit 25 based on the operation period specification information included in the setting information, the operating time of the wireless communication unit 25 can be restricted, the power consumption of the battery 22 can be suppressed, and the continuous use time can be extended. In addition, since the operation period specification information includes operation start time information for specifying the start time of the operation period and operation end time information for specifying the end time of the operation period, a desired operation period can be set based on the specification of the operation start time and the operation end time. Also, since the operation period specification information includes operation day-of-week information for specifying the day of the week to be the operation period, it is possible to prevent the wireless communication unit 25 from operating uselessly on days when communication with the management terminal 1 is unnecessary (for example, Sundays), and further suppress the power consumption. Moreover, since the operation period specification information includes an operation time specification state (specification presence / absence information) indicating the presence or absence of the specification of the operation period, it is possible to enable or disable the specification of the operation period only by changing the operation time specification state without rewriting the operation start time, the operation end time, and the operation day of the week. In addition, since the setting information is stored in the storage unit 26 composed of a rewritable non-volatile memory, it is possible to avoid the loss of the setting information due to a decrease in the battery voltage or the like, and prevent the wireless communication unit 25 from operating uselessly due to the loss of the operation period specification information.

[0037] The management terminal 1 includes, as a functional configuration realized by the cooperation of hardware and software, an inclination value storage means, a management information transmission means, and a setting information transmission means.

[0038] The inclination value storage means receives and stores the inclination value transmitted from the detection unit 2. For example, the inclination value storage means of the present embodiment receives the corrected inclination value and the temperature value associated with the measurement time information, and stores the corrected inclination value and the temperature value as time-series data based on the measurement time information.

[0039] The management information transmission means transmits management information including the inclination value received from the detection unit 2 and the event detected based on the inclination value to another terminal 3 via the Internet 4. For example, the management information transmission means of this embodiment transmits time-series data for the past several days (e.g., two days) and events detected based on the time-series data to another terminal 3 by e-mail at a fixed time. Note that the events detected based on the time-series data, for example, indicate the influence on the surrounding ground and surrounding buildings due to construction, such as the inclination value of the sheet pile changing in a transition different from the periodic variation of the previous day.

[0040] The setting information transmission means transmits the setting information of the detection unit 2. This setting information includes the operation period designation information described above.

[0041] According to such a management terminal 1, since the transition of the inclination value at the construction site and around the construction site is recorded as time-series data, the influence on the surrounding ground and surrounding buildings due to construction can be evaluated based on the time-series data. In addition, since the management terminal 1 transmits the setting information including the operation period designation information, it becomes possible to set the operation period of the detection unit 2 (wireless communication unit 25) from the management terminal 1 side.

[0042] Hereinafter, the processing procedure of the detection unit 2 and the display screen of the management terminal 1 for realizing the above functional configuration will be described with reference to FIGS. 3 to 9.

[0043] <Processing Procedure at Connection> First, the processing procedure until the management terminal 1 and the detection unit 2 (wireless communication unit 25) start wireless communication will be described with reference to FIGS. 3 and 4.

[0044] As shown in FIG. 3, the wireless communication unit 25 turns on the BLE advertisement (broadcast communication) (S101) and waits until it is connected from the management terminal 1 (S102). As shown in FIG. 4(a), when the management terminal 1 receives the advertisement information, it displays the detection unit name 1Aa and the MAC (Media Access Control) address 1Ab for identifying the detection unit 2 on the connection screen 1A. Here, after the user operates the management terminal 1 to select the detection unit 2 to be connected and then taps the connection button 1Ac, the management terminal 1 sends a connection request. Note that when the management terminal 1 does not receive the advertisement information, it sets the connection screen 1A as a blank screen 1Ad and disables the operation of the connection button 1Ac.

[0045] The wireless communication unit 25 returns a response to the connection request from the management terminal 1. Thereby, the connection with the management terminal 1 is completed. When the connection is completed, the wireless communication unit 25 turns off the advertisement (S103) and notifies the control unit 21 that the connection with the management terminal 1 is completed (S104). Note that when 5 seconds have elapsed in a state where the wireless communication unit 25 does not receive a connection request from the management terminal 1, it turns off the advertisement (S105), enters the sleep (low power consumption) state (S106), and waits for 10 seconds (S107). Thereafter, the wireless communication unit 25 repeats operations such as turning on the advertisement again (S101) and waiting for a connection request from the management terminal 1 (S102).

[0046] <Processing procedure at the time of setting> Next, the processing procedure until the detection unit 2 (control unit 21) starts measuring the inclination value will be described with reference to FIGS. 5 and 6.

[0047] As shown in FIG. 5, the control unit 21 of the detection unit 2 acquires the received data from the management terminal 1 via the wireless communication unit 25 (S108), and determines the received data (S109). After the connection with the detection unit 2 is completed, the management terminal 1 transmits a setting information acquisition request. The setting information acquisition request includes an ID for identifying that it is a setting information acquisition request. When the control unit 21 determines that the received data is a setting information acquisition request (S109), it reads out the setting information such as the operation information, installation direction, measurement interval, measurement angle X of the offset value, measurement angle Y of the offset value, operation period designation information, and total number of measurement results stored in the storage unit 26 (S110). Further, the control unit 21 acquires the remaining battery level obtained by AD conversion from the battery 22 (S111). Then, the control unit 21 transmits a setting information acquisition response including the setting information read from the storage unit 26, the acquired remaining battery level, and an ID for identifying that it is a setting information acquisition response to the management terminal 1 via the wireless communication unit 26 (S112).

[0048] When the management terminal 1 receives the setting information acquisition response, it displays a setting confirmation / selection screen 1B shown in FIG. 6(a). The setting confirmation / selection screen 1B of the management terminal 1 displays the remaining battery level 1Ba received from the detection unit 2, the operation state 1Bb, the installation direction 1Bc, the measurement interval 1Bd, the offset value 1Be, the operation time designation state 1Bi, and the operation day of the week 1Bj. When the offset value is not set, "none" is displayed in the offset value 1Be. When the operation period is not specified, "none" is displayed in the operation time designation state 1Bi, and when the operation period is specified, the operation start time and the operation end time are displayed in the operation time designation state 1Bi.

[0049] On the setting confirmation / selection screen 1B of the management terminal 1, a measurement setting button 1Bf and a data initialization button 1Bg are further displayed. When the measurement setting button 1Bf of the management terminal 1 is tapped, a measurement setting screen 1C shown in FIG. 6(b) is displayed, and when the data initialization button 1Bg is tapped, a data initialization request is transmitted. The data initialization request is information including an ID for identifying that it is a data initialization request.

[0050] As shown in FIG. 5, when the control unit 21 of the detection unit 2 determines that the received data is a data initialization request (S109), it returns the setting information stored in the storage unit 26 to the settings at the time of shipment (S113). Further, the control unit 21 clears the measurement date and time, the tilt angle X, the tilt angle Y, the temperature, and the installation direction included in the measurement result (S114). Thereafter, the control unit 21 transmits a data initialization response to the management terminal 1 via the wireless communication unit 25 (S115). Note that the settings at the time of shipment are stored in the ROM of the control unit 21. Also, the data initialization response is information including an ID for identifying that it is a data initialization response.

[0051] As shown in FIG. 6(b), on the measurement setting screen 1C of the management terminal 1, the installation direction 1Ca received from the detection unit 2, the measurement interval 1Cb, the operation time specification state 1Cf, the operation start time 1Cg, the operation end time 1Ci, and the operation day of the week 1Cj are displayed. The user can change these values by operating the management terminal 1. The installation direction 1Ca indicates the installation direction of the detection unit 2, and horizontal or vertical can be selected. The measurement interval 1Cb can specify the time interval for measuring the tilt angle. For example, values such as 1 minute, 5 minutes, 10 minutes, 30 minutes, 1 hour, 6 hours, 12 hours, and 1 day can be selected.

[0052] The operation time specification state 1Cf can specify whether there is a specification of the operation period. In the case of "yes", the operation start time, the operation end time, and the operation day of the week can be input, and in the case of "no", input is not possible. The operation start time 1Cg and the operation end time 1Ci indicate the time zone that can be connected to the management terminal 1, and can be specified from 00:00 to 23:59. The operation day of the week 1Cj indicates the days of the week that can be connected to the management terminal 1, and a plurality can be specified from among Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday.

[0053] On the measurement setting screen 1C of the management terminal 1, there are further displayed an offset button 1Cc and a non-offset button 1Cd. When the non-offset button 1Cd of the management terminal 1 is tapped, the management terminal 1 displays a setting value confirmation screen 1D shown in Fig. 6(c). Also, when the offset button 1Cc of the management terminal 1 is tapped, the management terminal 1 sends an offset measurement request to the detection unit 2. However, the description of the processing procedure of the detection unit 2 for the offset measurement request is omitted.

[0054] On the setting value confirmation screen 1D of the management terminal 1, there are displayed an installation direction 1Da set on the measurement setting screen 1C, a measurement interval 1Db, the presence or absence of an offset measurement result 1Dc, an operation time specification state 1Dd, an operation start time 1De, an operation end time 1Df, and an operation day of the week 1Dg. Further, on the setting value confirmation screen 1D of the management terminal 1, there are displayed a return button 1Dh and a measurement start button 1Di. When the return button 1Dh of the management terminal 1 is tapped, the management terminal 1 displays the measurement setting screen 1C. Also, when the measurement start button 1Di of the management terminal 1 is tapped, the management terminal 1 sends a measurement start request. The measurement start request is information including an ID for identifying that it is a measurement start request, the current time 1Dj, the installation direction 1Da, the measurement interval 1Db, the presence or absence of an offset measurement result 1Dc (or an offset value), and operation period specification information. The operation period specification information includes the operation time specification state 1Dd, the operation start time 1De, the operation end time 1Df, and the operation day of the week 1Dg displayed on the setting value confirmation screen 1D. The current time 1Dj is the time measured by the management terminal 1 and is information such as year, month, day, hour, minute, second, and day of the week. For example, the management terminal 1 can also update the time from a time server via the Internet 4.

[0055] As shown in FIG. 5, when the control unit 21 of the detection unit 2 determines that the received data is a measurement start request (S109), after updating the current time of the RTC (S116), it updates the setting information stored in the storage unit 26 (S117). The setting information to be updated includes the installation direction, measurement interval, inclination angle X of the offset value, inclination angle Y of the offset value, operation time designation state, operation start time, operation end time, operation day of the week, and the like. Further, after setting the operation state to "measuring" (S118), the control unit 21 calculates the measurement time and stores it in the storage unit 26 (S119). Thereafter, after setting an alarm for the calculated measurement time (S120), the control unit 21 transmits a measurement start response to the management terminal 1 via the wireless communication unit 25 (S121). The measurement time can be calculated by adding the measurement interval to the current time.

[0056] When the management terminal 1 receives a measurement start response from the detection unit 2, it displays a measurement start confirmation screen 1E shown in FIG. 6(d). When the OK button 1Ea on the measurement start confirmation screen 1E is tapped, the management terminal 1 transmits a setting information acquisition request. When the management terminal 1 receives a setting information acquisition response from the detection unit 2, it displays a setting confirmation / selection screen 1B in which the settings are reflected, as shown in FIG. 6(e). Note that a data acquisition button 1Bk is displayed on the setting confirmation / selection screen 1B. When the data acquisition button 1Bk is tapped in a state where data acquisition is possible, the management terminal 1 transmits a data acquisition request to the detection unit 2, but the description of the processing procedure of the detection unit 2 for the data acquisition request is omitted.

[0057] <Processing procedure at disconnection> Next, the processing procedure when the control unit 21 of the detection unit 2 executes the disconnection process will be described with reference to FIGS. 4 to 7.

[0058] A disconnection button 1Bh is displayed on the setting confirmation / selection screen 1B of the management terminal 1. When the disconnection button 1Bh is tapped, the management terminal 1 transmits a disconnection request. The wireless communication unit 25 of the detection unit 2 returns a response to the disconnection request from the management terminal 1 to complete the disconnection, and transmits a disconnection notification to the control unit 21.

[0059] When the control unit 21 of the detection unit 2 determines that the received data is a disconnection notification (S109), it acquires the current time (S122), the operation time designation state stored in the storage unit 26, the operation start time, the operation end time, the operation day of the week, the operation state, and the measurement time (S123). The control unit 21 determines the operation state (S124). If it is "measuring", it determines whether the inclination value is being measured (S125). If the inclination value is being measured, it ends the disconnection process.

[0060] When the operation state of the control unit 21 is "stopped" (S124), it determines the operation time designation state (S126). If there is an operation time designation, it determines whether the current time is outside the range (period) from the operation start time to the operation end time on the operation day of the week (S127). When the control unit 21 is outside the operation range, it turns off the power (power supply) of the wireless communication unit 25 (S128). After setting the alarm time to the operation start time (S129), it sets the alarm (S130), enters the sleep (low power consumption) state (S131), and ends the disconnection process.

[0061] When the determination result in step S127 is within the operation range, after setting the alarm time to the operation end time (S132), it sets the alarm (S130), enters the sleep (low power consumption) state (S131), and ends the disconnection process. Also, when the determination result in step S126 is NO (no operation time designation), the control unit 21 enters the sleep state (S132) and ends the disconnection process.

[0062] When the determination result in step S125 is NO (other than during measurement), the control unit 21 determines the operating time specified state (S133). If the operating time is specified, it determines whether the current time is outside the range from the start operating time to the end operating time of the operating day (S134). When the control unit 21 determines that it is outside the operating range, it turns off the power of the wireless communication unit 25 (S135) and compares the measurement time with the start operating time (S136). When the start operating time is earlier than the measurement time, after setting the alarm time to the start operating time (S137), the control unit 21 sets the alarm (S130), enters the sleep state (S131), and ends the disconnection process. When the determination result in step S136 is NO (the start operating time is not earlier than the measurement time), the control unit 21 enters the sleep state (S132) and ends the disconnection process.

[0063] When the determination result in step S134 is NO (the current time is within the range from the start operating time to the end operating time of the operating day), the control unit 21 compares the start measurement time with the end operating time (S138). When the end operating time is earlier than the measurement time, after setting the alarm time to the end operating time (S139), the control unit 21 sets the alarm (S130), enters the sleep state (S131), and ends the disconnection process. When the determination result in step S138 is NO (the end operating time is not earlier than the start measurement time), the control unit 21 enters the sleep state (S131) and ends the disconnection process. Also, when the determination result in step S133 is NO (no operating time specified), the control unit 21 enters the sleep state (S131) and ends the disconnection process.

[0064] When the management terminal 1 receives a response to the disconnection request from the detection unit 2, it displays the connection screen 1A shown in FIG. 4. If the power of the wireless communication unit 25 of the detection unit 2 is ON, the connection screen 1A displays the connectable detection unit 2 (see (a) in FIG. 4). If the power of the wireless communication unit 25 is OFF, the connection screen 1A does not display the connectable detection unit 2 (see (b) in FIG. 4).

[0065] <Processing procedure during inclination value measurement> Next, the processing procedure when the control unit 21 of the detection unit 2 will perform tilt value measurement will be described with reference to FIG. 8.

[0066] The control unit 21 acquires the current time from the RTC (S140), and acquires the setting information from the storage unit 26 (S141). The setting information to be acquired includes the installation direction, measurement interval, offset value of tilt angle X, offset value of tilt angle Y, and the like. Further, the control unit 21 acquires the three-axis acceleration X, acceleration Y, acceleration Z, three-axis angular velocity X, angular velocity Y, and angular velocity Z from the angle measurement unit 23 (S142), and acquires the temperature from the temperature measurement unit 24 (S143). Further, the control unit 21 calculates the temperature-corrected acceleration X', acceleration Y', and acceleration Z' (S144), and further calculates the tilt angle X and tilt angle Y (S145). Further, the control unit 21 adds the offset value of tilt angle X and the offset value of tilt angle Y to the tilt angle X and tilt angle Y (S146). The control unit 21 repeats these processes (S142 to S146) up to a specified number of times (S147), and calculates the average tilt angle X and the average tilt angle Y (S148). After the control unit 21 stores the measurement results in the storage unit 26 (S149), it calculates the next measurement time and stores it in the storage unit 26 (S150).

[0067] The control unit 21 determines whether it is connected to the management terminal 1 (S151). If it is connected to the management terminal 1, after setting the alarm time to the measurement time (S152), it sets the alarm (S153) and ends the inclination angle measurement. Also, when the determination result in step S151 is NO (not connected to the management terminal 1), the control unit 21 acquires the operating time designation state, the operating start time, the operating end time, and the operating day of the week stored in the storage unit 26 (S154) and determines the operating time designation state (S155). When there is an operating time designation, the control unit 21 determines whether the current time is outside the range from the operating start time to the operating end time on the operating day of the week (S156). If it is outside the operating range, it turns off the power of the wireless communication unit 25 (S157) and compares the measurement time with the operating start time (S158). When the operating start time is earlier than the measurement time, after setting the alarm time to the operating time start time (S159), it sets the alarm (S160), enters the sleep state (S161), and ends the inclination angle measurement. When the determination result in step S158 is NO (the operating start time is not earlier than the measurement time), after setting the alarm time to the measurement time (S162), it sets the alarm (S160), enters the sleep state (S161), and ends the inclination angle measurement.

[0068] Also, when the determination result in step S156 is NO (not outside the operating range), the control unit 21 compares the measurement time with the operating end time (S163). When the operating end time is earlier than the measurement time, after setting the alarm time to the operating end time (S164), it sets the alarm (S160), enters the sleep state (S161), and ends the inclination angle measurement. Also, when the determination result in step S163 is NO (the operating end time is not earlier than the measurement time), after setting the alarm time to the measurement time (S162), it sets the alarm (S160), enters the sleep state (S161), and ends the inclination angle measurement. Also, when the determination result in step S155 is NO (no operating time designation), after setting the alarm time to the measurement time (S162), it sets the alarm (S160), enters the sleep state (S161), and ends the inclination angle measurement.

[0069] <Processing Procedure at Alarm Activation> Next, the control unit 21 of the detection unit 2 will describe the processing procedure after activation by the alarm with reference to FIG. 9.

[0070] The control unit 21 of the detection unit 2 acquires the current time from the RTC (S165), and acquires the operating time designation state, start time of operation, end time of operation, operating day of the week, operating state, and measurement time stored in the storage unit 26 (S166). Then, the control unit 21 determines the operating time designation state (S167). If there is no operating time designation, the startup process is terminated.

[0071] If the determination result in step S167 is NO (there is an operating time designation), the control unit 21 determines whether the current time is outside the range from the start time of operation to the end time of operation on the operating day of the week (S168). If the control unit 21 is outside the operating range, it turns off the power of the wireless communication unit 25 (S169), determines whether the operating state is "stopped", and compares the measurement time with the start time of operation (S170). If the operating state is "stopped" or the start time of operation is earlier than the measurement time, after setting the alarm time to the start time of operation (S171), the alarm is set (S172), the device enters the sleep state (S173), and the startup process ends. Also, if the determination result in step S170 is NO (the operating state is "measuring" and the start time of operation is not earlier than the measurement time), after setting the alarm time to the measurement time (S174), the alarm is set (S172), the device enters the sleep state (S173), and the startup process ends.

[0072] Also, when the determination result in step S168 is NO (not outside the operating range), the control unit 21 turns on the power of the wireless communication unit 25 (S175), determines whether the operating state is stopped, and compares the measurement time with the operation end time (S176). When the operating state is "stopped" or the operation end time is earlier than the measurement time, after setting the alarm time to the operation end time (S177), the control unit 21 sets the alarm (S172), enters the sleep state (S173), and ends the startup process. Further, when the determination result in step S176 is NO (the operating state is "measuring" and the operation end time is not earlier than the measurement time), after setting the alarm time to the measurement time (S174), the control unit 21 sets the alarm (S172), enters the sleep state (S173), and ends the startup process.

[0073] As described above in detail with reference to the embodiments, the present invention is not limited to specific embodiments, and various modifications and changes are possible within the scope described in the claims. Also, it is possible to combine all or a plurality of the components of the above-described embodiments.

[0074] For example, the detection unit in the above-described embodiment includes an inclination sensor and a temperature sensor, but may further include sensors other than the inclination sensor and the temperature sensor (for example, a humidity sensor, a vibration sensor, a noise sensor, etc.), and transmit these detected values to the management terminal.

[0075] Also, the management terminal in the above-described embodiment stores the detected values received from the detection unit as time-series data. However, the time-series data may include not only the detected values received from the detection unit but also information obtained from sources other than the detection unit. For example, information such as the construction schedule of the construction site, meteorological information (temperature, humidity, wind speed, rainfall, etc.) and disaster information (typhoon, earthquake, tsunami, volcanic eruption, etc.) of the area including the construction site can be associated with the time-series data. By doing so, it becomes easy to identify whether the cause of the change in the inclination value is due to construction, meteorology, or a disaster.

Explanation of Reference Numerals

[0076] S Construction Management System 1 Management Terminal 1A Connection Screen 1B Setting Confirmation and Selection Screen 1C Measurement Setting Screen 1D Set Value Confirmation Screen 1E Measurement Start Confirmation Screen 2 Detection Unit 21 Control Unit 22 Battery 23 Angle Measurement Unit 24 Temperature Measurement Unit 25 Wireless Communication Unit 26 Memory Unit 3 Other Terminals 4 Internet

Claims

1. A detection unit installed at a construction site or adjacent to the construction site, and a management terminal that acquires a detection value transmitted from the detection unit, comprising: the management terminal includes setting information transmission means for transmitting setting information of the detection unit; the setting information includes operation period designation information for designating an operation period of the detection unit; the detection unit includes a communication unit for communicating with the management terminal; a battery for supplying power to the communication unit; setting information acquisition means for acquiring the setting information; and operation state switching means for turning on the power supply to the communication unit during the designated operation period and turning off the power supply to the communication unit outside the operation period. A construction management system.

2. The construction management system according to claim 1, wherein the operation period designation information includes operation start time information for designating a start time of the operation period and operation end time information for designating an end time of the operation period.

3. The construction management system according to claim 1, wherein the operation period designation information includes operation day-of-week information for designating a day of the week as the operation period.

4. The construction management system according to claim 1, wherein the operation period designation information includes designation presence / absence information indicating the presence or absence of designation of the operation period.

5. The detection unit further includes a storage unit composed of a rewritable non-volatile memory, and the setting information is stored in the storage unit. The construction management system according to claim 1.

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