Construction management system and construction management method

Abstract

To make it possible to evaluate the impact of construction on the surrounding ground and buildings around a construction site.SOLUTION: A construction management system S comprises a detection unit 2 installed at a construction site or in a location adjacent to the construction site, and a management terminal 1 that acquires detection values transmitted from the detection unit 2. The detection unit 2 comprises an angle measurement unit 23, tilt value acquisition means that acquires a tilt value detected by the angle measurement unit 23, tilt value storage means that stores the acquired tilt value in a memory unit 26 of its own, and tilt value transmission means that transmits the tilt value stored in the memory unit 26 as a detection value. The management terminal 1 comprises tilt value storage means that receives and stores the tilt value.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] In performing construction such as civil engineering and 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 influence 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 and a construction management method capable of evaluating the influence 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 construction management system comprising a management terminal that acquires a detection value transmitted from the detection unit, The detection unit includes An inclination sensor, and Inclination value acquisition means for acquiring an inclination value detected by the inclination sensor, Inclination value storage means for storing the obtained inclination value in its own data storage unit; Inclination value transmission means for transmitting the inclination value stored in the data storage unit as the detection value; and The management terminal includes inclination value storage means for receiving and storing the inclination value.

Effect 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

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Mode for Carrying Out the Invention

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

[0010] <Configuration of the Construction Management System> As shown in FIG. 1, the construction management system S according to an 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 land, 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 (tilt sensor), a temperature measurement unit 24 (temperature sensor), a wireless communication unit 25, and a storage unit 26 (data holding unit).

[0015] The control unit 21 is composed of an integrated arithmetic circuit such as a microcomputer including 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 time and an alarm function for recognizing a specified time.

[0016] The battery 22 is composed 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 is composed of, for example, an IMU (Inertial Measurement Unit), measures the three-axis accelerations X, Y, and 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 is composed 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, for example, 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 set from the management terminal 1, information set by the operation of the detection unit 2, and measurement data obtained by measurement.

[0021] The information for each detection unit 2 set at the time of factory shipment includes, for example, the correction coefficient X for temperature characteristics, the correction coefficient Y for temperature characteristics, and the correction coefficient Z for temperature characteristics 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 values change according to temperature changes, and are different for each individual of the angle measurement unit 23, so 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 approximate curve is calculated for the average values of the accelerations X, Y, and Z for each temperature, and the slopes of the approximate 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, the measurement interval and the installation direction. The measurement interval is set in minutes for the interval at which the detection unit 2 measures the tilt angle X and the tilt angle 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.

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

[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] <Functional Configuration of Detection Unit and Management Terminal> The detection unit 2 (control unit 21) includes, as a functional configuration realized by the cooperation of hardware and software, 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, and a tilt value transmission means.

[0026] 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.

[0027] The measurement time information acquisition means acquires the measurement time information (including the measurement date and the measurement time) of the tilt value by the angle measurement unit 23.

[0028] 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.

[0029] 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. In this correction process, the aforementioned correction coefficient X for temperature characteristics, the correction coefficient Y for temperature characteristics, and the correction coefficient Z for temperature characteristics are used.

[0030] Each time the tilt value acquisition means acquires a tilt value from the angle measurement unit 23, the tilt value storage means stores the acquired tilt value and the like in the storage unit 26. For example, the tilt value storage means of this embodiment stores the acquired tilt value, temperature value, and corrected tilt value in the storage unit 26 by associating them with the measurement date and time.

[0031] The tilt value transmission means transmits the tilt value and the like stored in the data holding unit to the management terminal 1. For example, the tilt value transmission means of this embodiment transmits the measurement date and time, corrected tilt value, 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.

[0032] According to such a detection unit 2, since the measured tilt value is stored in its own storage unit 26, even if troubles such as communication failures occur between the management terminal 1 and the detection unit 2, loss of measurement data can be prevented. In addition, since the detection unit 2 corrects the measured tilt value based on the temperature value, measurement errors due to temperature can be suppressed. Further, since the detection unit 2 acquires the measurement time information of the tilt value and stores the tilt value in association with the measurement time information, accurate time-series data can be stored. In addition, since the detection unit 2 acquires and stores the tilt value every specified time, changes in the tilt value can be recorded with high precision. Also, 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 in real time from the detection unit 2, the communication time can be reduced and the power consumption can be suppressed.

[0033] The management terminal 1 includes a tilt value storage means and a management information transmission means as a functional configuration realized by the cooperation of hardware and software.

[0034] 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 temperature value associated with the measurement time information, and stores the corrected inclination value and temperature value as time series data based on the measurement time information.

[0035] 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 the present embodiment transmits, at a fixed time, 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 email. Note that the events detected based on the time series data indicate, for example, that the inclination value of the sheet pile has changed in a transition different from the periodic variation of the previous day, suggesting the influence on the surrounding ground and surrounding buildings due to the construction.

[0036] 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 the construction can be evaluated based on the time series data.

[0037] 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.

[0038] <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.

[0039] 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, 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.

[0040] 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).

[0041] <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.

[0042] 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, 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 25 (S112).

[0043] When the management terminal 1 receives the setting information acquisition response, it displays the 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, and the offset value 1Be (including the measurement angle X and measurement angle Y of the offset value). If the offset value is not set, it is displayed as "none".

[0044] 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, it displays the measurement setting screen 1C shown in FIG. 6(b), and when the data initialization button 1Bg is tapped, it transmits a data initialization request. The data initialization request is information including an ID for identifying that it is a data initialization request.

[0045] 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 operating state, measurement interval, installation direction, inclination angle X of the offset value, and inclination angle Y of the offset value 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, inclination angle X, inclination angle Y, temperature, and 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.

[0046] On the setting confirmation / selection screen 1B of the management terminal 1, a disconnection button 1Bh is further displayed. 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 then starts the connection process shown in FIG. 3. As a result, the display screen of the management terminal 1 switches to the connection screen 1A shown in FIG. 4. Note that the data acquisition button 1Bi displayed on the setting confirmation / selection screen 1B of the management terminal 1 cannot be operated when the total number of measurement results is 0.

[0047] As shown in FIG. 6(b), on the measurement setting screen 1C of the management terminal 1, the installation direction 1Ca and the measurement interval 1Cb received from the detection unit 2 are displayed. The user can change the values of the installation direction 1Ca and the measurement interval 1Cb 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 inclination 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.

[0048] On the measurement setting screen 1C of the management terminal 1, a button 1Cc for offsetting is further displayed. When the button 1Cc for offsetting is tapped, the management terminal 1 sends an offset measurement request and displays an offset acquisition in-progress screen 1D. The offset measurement request is information including an ID for identifying that it is an offset measurement response and an installation direction.

[0049] As shown in FIG. 5, when the control unit 21 of the detection unit 2 determines that the received data is an offset measurement request (S109), it 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 (S116). Further, the control unit 21 acquires the temperature from the temperature measurement unit 24 (S117), calculates the acceleration X', acceleration Y', and acceleration Z' after temperature correction (S118), and then calculates the tilt angles X and Y (S119). The control unit 21 repeats these processes (S116 to S119) up to a specified number of times (S120), calculates the average tilt angle X and the average tilt angle Y after that (S121), and then transmits an offset measurement response to the management terminal 1 via the wireless communication unit 25 (S122). The offset measurement response is information including an ID for identifying that it is an offset measurement response, the average tilt angle X, and the average tilt angle Y.

[0050] The acceleration X', acceleration Y', and acceleration Z' are values obtained by correcting the increase and decrease in the values of the acceleration X, acceleration Y, and acceleration Z generated due to the influence of temperature, and can be corrected by multiplying the temperature by the temperature characteristic correction coefficient X, the temperature characteristic correction coefficient Y, and the temperature characteristic correction coefficient Z. Further, the tilt angles X and Y can be calculated using the roll rotation, the pitch rotation angle, the acceleration X', the acceleration Y', and the acceleration Z' according to the installation direction of the detection unit 2. Note that the installation direction of the detection unit 2 can be determined based on the setting information whether it is installed horizontally or vertically. Also, the average tilt angle X and the average tilt angle Y are, for example, the average of the tilt angles X and Y calculated every 10 msec for 2000 times, and a more stable value can be calculated if the number of times is large.

[0051] On the measurement setting screen 1C of the management terminal 1, a non-offset button 1Cd is further displayed. When the non-offset button 1Cd on the management terminal 1 is tapped, the setting value confirmation screen 1E shown in Fig. 6(d) is displayed. Also, when the return button 1Ce displayed on the measurement setting screen 1C of the management terminal 1 is tapped, the setting confirmation / selection screen 1B is displayed. The offset acquisition in-progress screen 1D of the management terminal 1 shown in Fig. 6(c) is a screen displayed during offset value acquisition. When an offset measurement result response is received from the detection unit 2, the display screen switches to the setting value confirmation screen 1E.

[0052] The setting value confirmation screen 1E of the management terminal 1 displays the installation direction 1Ea set on the measurement setting screen 1C, the measurement interval 1Eb, the presence or absence of the offset measurement result 1Ec, and the offset value 1Ed (average inclination angle X, average inclination angle Y) received from the detection unit 2. Further, on the setting value confirmation screen 1E of the management terminal 1, a return button 1Ee and a measurement start button 1Ef are displayed. When the return button 1Ee on the management terminal 1 is tapped, the measurement setting screen 1C is displayed. Also, when the measurement start button 1Ef on the management terminal 1 is tapped, a measurement start request is transmitted. The measurement start request is information including an ID for identifying that it is a measurement start request, the current time 1Eg, the installation direction 1Ea, the measurement interval 1Eb, the presence or absence of the offset measurement result 1Ec, and the offset value 1Ed. The current time 1Eg 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.

[0053] 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 (S123), it updates the setting information stored in the storage unit 26 (S124). 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, and the like. Further, the control unit 21 sets the operation state to "measurement start" (S125), sets the measurement start time as an alarm after that (S126), and then transmits a measurement start response to the management terminal 1 via the wireless communication unit 25 (S127). The measurement start time can be calculated from the current time and the measurement interval.

[0054] When the management terminal 1 receives the measurement start response from the detection unit 2, it displays the measurement start confirmation screen 1F shown in Fig. 6(e). When the OK button 1Fa on the measurement start confirmation screen 1F is tapped, the management terminal 1 transmits a setting information acquisition request. When the management terminal 1 receives the setting information acquisition response from the detection unit 2, it displays the setting confirmation / selection screen 1B with the settings reflected as shown in Fig. 6(f).

[0055] <Processing procedure during inclination value measurement> Next, the processing procedure when the control unit 21 of the detection unit 2 executes inclination value measurement will be described with reference to Fig. 7.

[0056] The control unit 21 acquires the current time from the RTC (S128) and acquires the setting information from the storage unit 26 (S129). The setting information to be acquired includes the installation direction, measurement interval, offset value of tilt angle X, offset value of tilt angle Y, etc. Also, 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 (S130), and acquires the temperature from the temperature measurement unit 24 (S131). Further, the control unit 21 calculates the acceleration X', acceleration Y', and acceleration Z' after temperature correction (S132), and further calculates the tilt angle X and tilt angle Y (S133). Also, 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 (S134). The control unit 21 repeats these processes (S130 to S134) up to a specified number of times (S135) and calculates the average tilt angle X and average tilt angle Y (S136). After that, the control unit 21 saves the measurement results in the storage unit 26 (S137) and sets an alarm for the next measurement start time (S138).

[0057] Note that the calculation methods of the acceleration X', acceleration Y', and acceleration Z' after temperature correction, and the tilt angle X and tilt angle Y are the same as those described in the offset measurement requirement, so the description is omitted. The measurement results are saved in the storage unit 26 with the measurement date and time, average tilt angle X, average tilt angle Y, temperature, and installation direction as one set. The measurement date and time is the current time acquired from the RTC, which is the year, month, day, hour, minute, and second. The next measurement start time is the time obtained by adding the measurement interval to the current time acquired from the RTC.

[0058] <Processing procedure at data acquisition time> Next, the processing procedure from when the management terminal 1 acquires the measurement data from the detection unit 2 to when the measurement data is deleted will be described with reference to FIGS. 5, 8, and 9.

[0059] As shown in Fig. 8(a), on the setting confirmation / selection screen 1B of the management terminal 1, when there is one or more pieces of measurement data in the setting information acquisition response received from the detection unit 2, the data acquisition button 1Bi becomes operable. When the data acquisition button 1Bi is tapped, the management terminal 1 displays the measurement result screen 1G shown in Fig. 8(b). Also, when the measurement stop button 1Ga on the measurement result screen 1G is tapped, the management terminal 1 sends a measurement stop request. The measurement stop request is information including an ID for identifying that it is a measurement stop request.

[0060] As shown in Figs. 5 and 9, when the control unit 21 of the detection unit 2 determines that the received data is a measurement stop request (S109), it updates the operation state to "measurement stopped" (S139). After canceling the RTC alarm (S140), it sends a measurement stop response to the management terminal 1 via the wireless communication unit 25 (S141). The measurement stop response is information including an ID for identifying that it is a measurement stop response.

[0061] As shown in Fig. 8(c), on the measurement result screen 1G of the management terminal 1, when a measurement stop response is received from the detection unit 2, the measurement stop button 1Ga becomes inoperable and the data acquisition button 1Gb becomes operable. When the data acquisition button 1Gb is tapped, the management terminal 1 sends a measurement data acquisition request. The measurement data acquisition request is information including an ID for identifying that it is a measurement data acquisition request and the measurement data number to be acquired. The measurement data number is a number for identifying a set of measurement results including the measurement date and time, the average inclination angle X, the average inclination angle Y, the temperature, and the installation direction stored in the storage unit 26 of the detection unit 2, or a combination of multiple sets. For example, when there are 13 pieces of measurement results, the measurement data numbers for the first 6 sets of measurement results saved first are "1", the measurement data numbers for the 7th to 12th sets are "2", and the 13th set of measurement data is indicated as "3".

[0062] As shown in FIGS. 5 and 9, when the control unit 21 of the detection unit 2 determines that the received data is a measurement data acquisition request (S109), it reads out the measurement result specified by the measurement data number from the storage unit 26 (S142). Thereafter, the control unit 21 transmits a measurement data acquisition response to the management terminal 1 via the wireless communication unit 25 (S143). The measurement data acquisition response is information including an ID for identifying that it is a measurement data acquisition response, a measurement data number, the number of measurement results of the specified measurement data number, the measurement date and time of each measurement result, an average inclination angle X1, an average inclination angle Y1, a temperature, and an installation direction. The measurement data number is the same as the measurement data number of the measurement data acquisition request. The number of measurement results of the specified measurement data number is the number of sets of a set of measurement results including the measurement date and time, the average inclination angle X, the average inclination angle Y, the temperature, and the installation direction, and is a value of one set or more.

[0063] As shown in FIG. 8(d), when the measurement result screen 1G of the management terminal 1 starts receiving the measurement data acquisition response from the detection unit 2, it displays a pop-up screen 1Gc during data acquisition and repeats this until the measurement results for the total number of all measurement results are acquired. Further, as shown in FIG. 8(e), after the management terminal 1 has acquired all the measurement results, it displays a graph 1Gd in which the inclination values of the measurement results are arranged in chronological order. Further, when the measurement date selection button 1Ge on the measurement result screen 1G of the management terminal 1 is tapped, the management terminal 1 displays a graph in which the inclination values of different measurement dates are arranged in chronological order. Further, the management terminal 1 may send the acquired measurement data and the events detected based on the measurement data to another terminal 3 by email via the Internet 4. Further, when the memory deletion button 1Gf on the measurement result screen 1G of the management terminal 1 is tapped, the management terminal 1 transmits a measurement data clear request. The measurement data clear request is information including an ID for identifying that it is a measurement data clear request.

[0064] As shown in FIGS. 5 and 9, when the control unit 21 of the detection unit 2 determines that the received data is a measurement data clear request (S109), it deletes all the measurement results stored in the storage unit 26 (S144). Thereafter, the control unit 21 transmits a measurement data clear response to the management terminal 1 via the wireless communication unit 25 (S145). The measurement data clear response is information including an ID for identifying that it is a measurement data clear response. When the management terminal 1 receives the measurement data clear response from the detection unit 2, as shown in FIG. 8(f), it makes the memory deletion button 1Gf of the measurement result screen 1G inoperable.

[0065] Although the embodiments have been described in detail above, 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.

[0066] For example, the detection unit of 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 detection values to the management terminal.

[0067] Also, the management terminal of the above-described embodiment stores the detection values received from the detection unit as time-series data, but the time-series data may include not only the detection values received from the detection unit but also information acquired 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, weather, disaster, etc.

Explanation of Reference Numerals

[0068] S Construction management system 1 Management terminal 1A Connection screen 1B Setting confirmation / selection screen Screen for 1C measurement settings Screen during offset acquisition for 1D Screen for confirming set values for 1E Screen for confirming measurement start for 1F Screen for measurement results for 1G 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 construction management system comprising a detection unit installed at a construction site or on an adjacent site of the construction site, and a management terminal for acquiring a detection value transmitted from the detection unit, wherein the detection unit includes an inclination sensor, an inclination value acquisition means for acquiring an inclination value detected by the inclination sensor, an inclination value storage means for storing the acquired inclination value in its own data storage unit, and an inclination value transmission means for transmitting the inclination value stored in the data storage unit as the detection value, and the management terminal includes an inclination value storage means for receiving and storing the inclination value.

2. The detection unit further includes a temperature sensor, a temperature value acquisition means for acquiring a temperature value detected by the temperature sensor, and an inclination value correction means for correcting the inclination value based on the acquired temperature value, wherein the inclination value storage means stores the corrected inclination value corrected by the inclination value correction means in the data storage unit, the inclination value transmission means transmits the corrected inclination value as the detection value, and the inclination value storage means receives and stores the corrected inclination value. The construction management system according to claim 1.

3. The detection unit further includes a time synchronization function for recognizing time, and a measurement time information acquisition means for acquiring measurement time information of the inclination value, wherein the inclination value storage means stores the inclination value in association with the measurement time information in the data storage unit, the inclination value transmission means transmits the associated inclination value and the measurement time information as the detection value, and the inclination value storage means receives the associated inclination value and the measurement time information, and stores the received inclination value as time series data based on the measurement time information. The construction management system according to claim 1.

4. The detection unit further includes an alarm function for recognizing a specified time, wherein the inclination value acquisition means acquires the inclination value from the inclination sensor every specified time, and the inclination value storage means stores the inclination value acquired every specified time in the data storage unit. The construction management system according to claim 1.

5. The inclination value transmission means transmits the inclination value stored in the data storage unit as the detection value in response to a data transmission request from the management terminal. The construction management system according to claim 1.

6. The detection unit transmits the detection value to the management terminal by wireless communication. ​ The construction management system according to claim 1, wherein the management terminal further comprises management information transmission means for transmitting management information including the detected value or an event detected based on the detected value to another terminal via the Internet.

7. A construction management method using a detection unit installed at a construction site or an adjacent area of the construction site, and a management terminal that acquires a detected value transmitted from the detection unit. The method comprises: the detection unit acquiring an inclination value detected by an inclination sensor, storing the acquired inclination value in its own data holding unit, transmitting the inclination value stored in the data holding unit as the detected value, and the management terminal receiving and storing the inclination value.

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