Estimation method and estimation system for estimating co2 emissions during construction

Abstract

To provide an estimation method and an estimation system for estimating CO2 emissions during construction that estimate the CO2 emissions due to construction machinery during construction work by simply grasping operating status of the construction machinery.SOLUTION: A method for estimating CO2 emissions due to construction machinery during construction work includes: a step S1 of attaching a vibration recording device to the construction machinery before the start of the construction work; a step S2 of causing the vibration recording device to record vibrations of the construction machinery during the construction work; a step S3 of detaching the vibration recording device from the construction machinery after the construction work is completed; a step S4 of transferring data on the vibrations recorded by the detached vibration recording device to an information apparatus; and a step S5 of estimating the CO2 emissions based on the data transferred by the information apparatus.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a method and system for estimating CO2 emissions during construction. [Background technology]

[0002] Traditionally, the construction industry has been working to monitor CO2 emissions during construction, aiming to achieve carbon neutrality at the construction stage (see, for example, Patent Documents 1 and 2). The present patent applicant has also built a CO2 emissions monitoring system during construction, as shown in Non-Patent Document 1, and is using it on-site. In this system, the input data on the operation of construction machinery (heavy machinery) at the site is manually entered by on-site personnel after the end of each day's work, based on a paper-based management ledger at the site. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-18061 [Patent Document 2] Japanese Patent Application Publication No. 2023-60729 [Non-patent literature]

[0004] [Non-Patent Document 1] Shimizu Corporation website, news release "Deployment of CO2 Emission Monitoring System During Construction at All Construction Sites," [online], [Retrieved November 6, 2023], Internet<URL:https: / / www.shimz.co.jp / company / about / news-release / 2023 / 2022064.html> Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the system described in Non-Patent Document 1 above, there are concerns that the system may not be able to confirm consistency with the actual operating status of the construction machinery, or that data may be forgotten to be entered due to busy work schedules. Possible methods for ensuring consistency with the actual operating status of the construction machinery include, for example, installing an operating status monitoring device equipped with a communication line in the construction machinery to constantly monitor the operating status of the construction machinery in real time, or estimating the position of the construction machinery from images captured by an AI (artificial intelligence) surveillance camera at the construction site to grasp the operating status of the construction machinery. However, these methods incur costs for hardware and communication lines, and may result in a complex system. Another issue is that the system may not be usable in areas where communication line signals do not reach sufficiently, such as mountainous regions.

[0006] The inventors of the present invention have therefore conducted extensive research to solve these problems, and as a result have discovered that it is not necessary to use a communication line to monitor the operational status of construction machinery in real time, and that it is sufficient to be able to grasp the operational status after the end of work for the day, which has led to the invention of the present invention.

[0007] The present invention has been made in consideration of the above, and aims to provide a method and system for estimating CO2 emissions during construction work, which estimates the CO2 emissions caused by construction machinery during construction work by simply grasping the operating status of the construction machinery. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems and achieve the object, the method for estimating CO2 emissions during construction according to the present invention is a method for estimating CO2 emissions by construction machinery during construction work, and is characterized by having the steps of attaching a vibration recording device to the construction machinery before the start of construction work, recording the vibrations of the construction machinery in the vibration recording device during construction work, detaching the vibration recording device from the construction machinery after the construction work is completed, transferring the vibration data recorded in the detached vibration recording device to an information device, and estimating CO2 emissions based on the data transferred by the information device.

[0009] Furthermore, the method for estimating CO2 emissions during construction according to the present invention is characterized in that, in the above-mentioned invention, the step of transferring the data to the information device includes a step of connecting the vibration recording device removed from the construction machine to the information device, and transmitting the data from the connected vibration recording device to the information device.

[0010] Furthermore, the method for estimating CO2 emissions during construction according to the present invention is characterized in that, in the above-mentioned invention, the step of transferring the data to the information device includes a step of reading, by image recognition, the data displayed on the vibration recording device removed from the construction machine.

[0011] In addition, the method for estimating CO2 emissions during construction according to the present invention, in the above-mentioned invention, further includes a step of transferring identification information that identifies the construction machine to the information device, and the step of estimating CO2 emissions is characterized in that the CO2 emissions are estimated based on the data and the identification information transferred by the information device.

[0012] Furthermore, the method for estimating CO2 emissions during construction according to the present invention is a method for estimating CO2 emissions by construction machinery during construction work, and is characterized by comprising the steps of: recording first data indicating the cumulative operating time of the construction machinery before the start of construction work; recording second data indicating the cumulative operating time of the construction machinery after the completion of construction work; transferring the first data and the second data to an information device; and estimating CO2 emissions based on the first data and the second data transferred by the information device.

[0013] In addition, the system for estimating CO2 emissions during construction according to the present invention is a system for estimating CO2 emissions by construction machinery during construction work, and comprises a vibration recording device that is attached to the construction machinery before construction work begins and records the vibrations of the construction machinery during construction work, and an information device that transfers the vibration data recorded in the vibration recording device that is removed from the construction machinery after construction work is completed, and is characterized in that the information device estimates CO2 emissions based on the transferred data.

[0014] Furthermore, the system for estimating CO2 emissions during construction according to the present invention is a system for estimating CO2 emissions by construction machinery during construction work, and comprises an operating time recording device that records first data indicating the cumulative operating time of the construction machinery before construction work begins and second data indicating the cumulative operating time of the construction machinery after construction work is completed, and an information device that transfers the first data and the second data recorded in the operating time recording device, and the information device estimates CO2 emissions based on the transferred first data and second data. [Effects of the Invention]

[0015] The method for estimating CO2 emissions during construction according to the present invention is a method for estimating CO2 emissions from construction machinery during construction work, and includes the steps of attaching a vibration recording device to the construction machinery before the start of construction work, recording the vibrations of the construction machinery in the vibration recording device during construction work, detaching the vibration recording device from the construction machinery after the construction work is completed, transferring the vibration data recorded in the detached vibration recording device to an information device, and estimating CO2 emissions based on the data transferred by the information device.Therefore, it has the effect of making it possible to easily grasp the operating status of the construction machinery and estimate CO2 emissions from the construction machinery during construction work.

[0016] Furthermore, the system for estimating CO2 emissions during construction according to the present invention is a system for estimating CO2 emissions from construction machinery during construction work, and includes a vibration recording device that is attached to the construction machinery before construction work begins and records the vibrations of the construction machinery during construction work, and an information device that transfers the vibration data recorded in the vibration recording device that is removed from the construction machinery after construction work is completed.The information device estimates CO2 emissions based on the transferred data, and therefore has the effect of making it possible to easily grasp the operating status of the construction machinery and estimate CO2 emissions from the construction machinery during construction work. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a schematic diagram showing an embodiment of a system for estimating CO2 emissions during construction according to the present invention. [Figure 2] FIG. 2 is a schematic flow diagram showing an embodiment of the method for estimating CO2 emissions during construction according to the present invention. [Figure 3] FIG. 3 is a diagram showing an example of recorded values ​​of the vibration recording device in the operating state of the heavy equipment. [Figure 4] FIG. 4 is a diagram showing an example of an image of vibration data recorded during work. [Figure 5] FIG. 5 is a diagram showing an example of an image of recorded vibration data. [Figure 6] FIG. 6 is a diagram showing an example of the change over time in recorded vibration data. [Figure 7] FIG. 7 is a diagram showing an example of an image of the UI for the registration work. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of a method and system for estimating CO2 emissions during construction according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments.

[0019] As shown in Figure 1, a system 10 for estimating CO2 emissions during construction according to an embodiment of the present invention is a system for estimating CO2 emissions from heavy equipment (construction machinery) during construction work, and includes a vibration recording device 14 that is attached to the heavy equipment 12 before the start of construction work and records the vibrations of the heavy equipment 12 during construction work, and an information device 16 to which the vibration recording device 14, which is removed from the heavy equipment 12 after the construction work is completed, is connected.

[0020] This estimation system 10 is used by steps S1 to S5 as shown in Fig. 2. Steps S1 to S5 correspond to a method for estimating CO2 emissions during construction according to this embodiment. Specific processing details of each of steps S1 to S5 will be described below.

[0021] First, in step S1, before construction work begins, the vibration recorder 14 is attached to the heavy equipment 12. In this case, when construction work begins at the site, the driver (operator) of the heavy equipment 12 may bring the vibration recorder 14 from a storage room in the site office to the site and attach it to the heavy equipment 12 that he or she will be operating. The attachment method is arbitrary, and various methods are possible, such as attaching it to the heavy equipment 12 using a hook-and-loop fastener such as Velcro (registered trademark) or double-sided tape, hanging it from the driver's seat of the heavy equipment 12, or connecting it to the operation key of the heavy equipment 12 and placing it on a nearly horizontal surface such as the dashboard.

[0022] A simple, small, portable device that integrates a sensor including a vibration sensor (e.g., an acceleration sensor) that detects vibrations and a data recording unit that records data on the detected vibrations can be used as the vibration recording device 14. The vibration recording device 14 does not need to have a constant IoT (Internet of Things) monitoring function using a communication line.

[0023] In the next step S2, during construction work, the vibration of the heavy equipment 12 is recorded in the vibration recorder 14 in accordance with the operation of the heavy equipment 12. The heavy equipment 12 is powered by an engine, and the operating state of the heavy equipment 12 is set based on the operating state of the engine. For example, possible operating states of the heavy equipment 12 include a "stopped state" in which the engine is stopped, an "idling state" in which the engine is idling, a "traveling state" in which the engine's power is used to travel the heavy equipment 12, and a "working state" in which the engine's power is used to perform work by the heavy equipment 12 (such as operating a bucket). It is believed that the tendency of the recorded values ​​of the vibration recorder 14 will change depending on these differences in the operating state of the heavy equipment 12.

[0024] For example, as shown in FIG. 3, it is conceivable to estimate the state of the heavy equipment 12 from differences in the frequency of vibrations per unit time (such as [times / minute]). Furthermore, the tasks performed by the heavy equipment 12 are varied, and it is estimated that the frequency of vibrations will change even during a series of tasks. For example, it is thought that the frequency of vibrations will change even during a series of tasks, such as "digging the soil," "leveling the soil," "lifting the soil," "dumping the soil," and "turning." It is also possible to estimate the type of work based on the trend in the change in the frequency of vibrations. FIG. 4 shows an example of the type of work that can be estimated from the trend in the frequency of vibrations. As shown in this figure, threshold values ​​(e.g., values ​​D, E, and F) can be set for the frequency of vibrations, and the type of work can be estimated based on a comparison of the magnitude with the set threshold or the trend of increase or decrease in the frequency of vibrations.

[0025] Furthermore, if the sensor built into the vibration recorder 14 can detect not only the number of vibrations but also the strength of acceleration, it will be possible to estimate the work content in more detail. Therefore, the work content of the heavy equipment 12 may be estimated in more detail based on the data on the number of vibrations and the data on the strength of acceleration recorded in the vibration recorder 14.

[0026] In the next step S3, after the construction work is completed, the vibration recording device 14 is removed from the heavy equipment 12. The driver (operator) of the heavy equipment 12 or the like takes the removed vibration recording device 14 back to the site office.

[0027] In the next step S4, the vibration recording device 14 that has been brought back is connected to an information device 16 that is always available in the site office, and the vibration data recorded in the vibration recording device 14 is transmitted to the information device 16. Data transmission can be performed automatically when the vibration recording device 14 is connected to the information device 16, or by operation of the driver (operator). In this way, the vibration data of the heavy equipment 12 is input into the information device 16. If steps S1 to S4 are performed for multiple heavy equipment 12 at the construction site, the vibration data of each heavy equipment 12 can be centrally collected in the information device 16. The information device 16 is a computer device capable of arithmetic processing, and for example, a personal computer or tablet terminal can be used.

[0028] The connection to the information device 16 may be a wired connection using a cable or a wireless connection using Wi-Fi or Bluetooth (registered trademark). The information device 16 may be a server on the cloud, and data may be sent from the vibration recording device 14 to the cloud via a wireless or wired communication line.

[0029] In step S4, the vibration data recorded in the vibration recorder 14 may be transferred to the information device 16 by any method other than the above. For example, if the vibration recorder 14 is capable of displaying the recorded vibration data, the vibration data displayed on the vibration recorder 14 removed from the heavy equipment 12 may be read by image recognition, thereby transferring the vibration data to the information device 16. In this case, the information device 16 may have a photographing unit, and the information device 16 may photograph the vibration data (e.g., a number representing the vibration frequency) displayed on the vibration recorder 14 and perform image recognition processing. Alternatively, the vibration data displayed on the vibration recorder 14 may be photographed by a photographing terminal separate from the information device 16, and the information device 16 may receive the photographed data or data obtained by performing image recognition on the photographed data from the photographing terminal. With this configuration, the vibration recorder 14 does not need to have a communication function, thereby further reducing the cost of vibration recording.

[0030] In the next step S5, the information device 16 is used to estimate the amount of CO2 emissions based on the transmitted vibration data. In this case, the vibration data is converted into CO2 emissions using a basic unit or the like. In this case, the data may simply be converted into CO2 emissions using the basic unit, or if the data shows changes over time, the time change in the data may be reflected in the CO2 emissions as differences in the operating state of the heavy equipment.

[0031] As an example, the conversion formula for converting vibration data into basic units and converting it into CO2 emissions is shown in formula (1). In formula (1), the operating status of the heavy equipment 12 is classified into multiple patterns based on the vibration data, and the CO2 emissions are calculated based on the sum of the products of the time (operating time) that the heavy equipment 12 is in each pattern and the vibration data (ratio) set for each pattern.

[0032] Q=((S1×T1)+(S2×T2)+···+(S n ×T n ))×K×V×1000...Equation (1) Here, Q: CO2 emissions per heavy machinery unit (tons) S: Vibration data (%)...It is assumed that this will be converted into a value between 0% and 100% depending on the operating condition of the heavy equipment. T: Operating time (h) K: Fuel consumption of heavy equipment (L / h) V: CO2 emissions per fuel (kg-CO2 / L) n: Number of heavy equipment operation states

[0033] The vibration data recorded by the vibration recording device 14 can be classified into three types: data in which a timestamp (time information) is added to the instantaneous value of the vibration frequency (pattern 1); data in which a timestamp (time information) is added to the cumulative value of the vibration frequency over a predetermined time period (for example, one minute) (pattern 2); and data containing only the cumulative value of the vibration frequency (pattern 3). Figure 5(1) is an example of patterns 1 and 2. Figure 5(2) is an example of pattern 3. In the case of pattern 3, it is necessary to calculate the vibration frequency during construction work by using the information device 16 to find the difference in the vibration frequency before and after the vibration recording device 14 is taken out.

[0034] In the cases of patterns 1 and 2, the operating state of the heavy equipment 12 can also be estimated according to the value of the vibration frequency. For example, as shown in Fig. 6, when the vibration frequency is equal to or greater than C, it can be estimated that the heavy equipment 12 is working, when it is equal to or greater than B and less than C, it can be estimated that the heavy equipment 12 is traveling, when it is equal to or greater than A and less than B, it can be estimated that the heavy equipment 12 is idling, and when it is less than A, it can be estimated that the heavy equipment 12 is stopped.

[0035] It is possible that the vibration characteristics and fuel consumption efficiency during operation vary depending on the type of heavy equipment 12 used. Therefore, the information device 16 may extract vibration data from the vibration recorder 14 and also extract identification information identifying the construction equipment to which the vibration recorder 14 is attached. The information device 16 may then estimate CO2 emissions based on the extracted vibration data and identification information. For example, the information device 16 extracts the identification information by accepting an input operation selecting the type of heavy equipment 12 to which the vibration recorder 14 is attached. The information device 16 then extracts reference information recorded in association with the type of heavy equipment 12 indicated by the identification information from the vibration recorder 14. The reference information is information indicating the relationship between vibration patterns and fuel consumption rates according to the type of heavy equipment 12. The information device 16 calculates CO2 emissions using the vibration data and the reference information. This configuration enables CO2 emissions to be estimated taking into account differences in vibration characteristics and fuel consumption efficiency depending on the type of heavy equipment 12, thereby enabling more accurate CO2 emission estimation.

[0036] According to this embodiment, the operating status of the heavy equipment 12 on the day of work can be easily grasped without using a communication line by using a simple vibration recording device 14. Furthermore, the CO2 emissions from the heavy equipment 12 can be estimated from the vibration data of the heavy equipment 12.

[0037] In the above embodiment, the registration work when the vibration recorder 14 is taken out from the storage room of the field office in step S1 and the work (step S4) when the vibration recorder 14 is connected to the information device 16 of the field office to transmit data may be performed using a UI (User Interface). The UI may be configured with a screen display device such as a touch panel for managing the vibration recorder 14. The display of the UI is not limited to a touch panel, and a screen display device such as a display connected to a computer may be used. Furthermore, input may be possible using an input device such as a keyboard or a mouse.

[0038] As shown in FIG. 7(1), when removing a vibration recording device 14 (referred to as a sensor in FIG. 7) from the site office, first, a worker (operator) is selected from the menu on screen 18A displayed on the screen display device. After selecting the worker, the display switches to screen 18B. Next, on screen 18B, the heavy equipment 12 to be used for the work is selected. After selecting the heavy equipment 12, the display switches to screen 18C, which displays the registration number of the sensor to be removed. In this example, the message "Please take sensor number 2098" is displayed, so the worker only needs to take "sensor number 2098" from a storage facility in the site office. After viewing this message, if the OK button on screen 18C is pressed, the time is recorded as a timestamp. The recorded timestamp is linked to the registration number of the displayed sensor, the selected worker (operator), and the heavy equipment 12, and is registered in a memory unit or the like provided in the construction CO2 emission estimation system 10.

[0039] As shown in FIG. 7(2), when the worker brings the vibration recording device 14 (referred to as a sensor in the figure) back to the site office, he first connects the vibration recording device 14 (sensor) to the information device 16. This causes the information device 16 to automatically download the sensor data (data recorded in the vibration recording device 14). When the downloaded data is registered in the information device 16, the screen switches to 18D, displaying a message indicating that the data has been registered. In this example, the message reads, "Sensor data has been registered. Thank you for your hard work." When the worker presses the confirmation OK button (not shown), the time is recorded as a timestamp and linked to the registration number of the sensor he brought back, and the data is registered in a memory unit or the like of the construction-time CO2 emission estimation system 10. The worker then stores the sensor he brought back in a storage unit or the like at the site office.

[0040] As described above, the method for estimating CO2 emissions during construction according to the present invention is a method for estimating CO2 emissions from construction machinery during construction work, and includes the steps of attaching a vibration recording device to the construction machinery before the start of construction work, recording the vibrations of the construction machinery in the vibration recording device during construction work, detaching the vibration recording device from the construction machinery after the construction work is completed, transferring the vibration data recorded in the detached vibration recording device to an information device, and estimating CO2 emissions based on the data transferred by the information device.Therefore, it is possible to easily grasp the operating status of the construction machinery and estimate CO2 emissions from the construction machinery during construction work.

[0041] Furthermore, the system for estimating CO2 emissions during construction according to the present invention is a system for estimating CO2 emissions from construction machinery during construction work, and includes a vibration recording device that is attached to the construction machinery before construction work begins and records the vibrations of the construction machinery during construction work, and an information device that transfers the vibration data recorded in the vibration recording device that is removed from the construction machinery after construction work is completed.The information device estimates CO2 emissions based on the transferred data, so that the operating status of the construction machinery can be easily grasped and the CO2 emissions from the construction machinery during construction work can be estimated.

[0042] The above description has been given of a case where CO2 emissions are estimated by recording the vibrations of a construction machine during construction work. However, the method of estimating CO2 emissions from a construction machine during construction work by simply understanding the operating status of the construction machine is not limited to this. For example, CO2 emissions can also be estimated by recording the operating time of the construction machine during construction work. Specifically, first, the operating time recording device records first data indicating the accumulated operating time of the construction machine before the start of construction work. Next, the operating time recording device records second data indicating the accumulated operating time of the construction machine after the completion of construction work. As a method for recording the first and second data, for example, the operating time recording device may have a photographing unit and record the data by photographing an hour meter built into the construction machine. Then, the information device extracts the first and second data recorded in the operating time recording device. As a method for extracting the data, for example, the photographing terminal may transmit the first and second data to the information device, or the photographing terminal may display an image of the hour meter photographed by the information device and the information device may perform image recognition processing on the displayed image. The information device that extracted the data estimates the amount of CO2 emissions based on the first data and the second data. For example, the information device may identify the operating time of the construction machine during construction work from the difference between the cumulative operating time indicated by the first data and the cumulative operating time indicated by the second data, and calculate the amount of CO2 emissions based on the identified operating time using a method similar to the above-mentioned formula (1). This method eliminates the need to prepare a vibration recording device to record the vibrations of the construction machine, thereby reducing the cost required for estimating the amount of CO2 emissions. [Industrial Applicability]

[0043] As described above, the method and system for estimating CO2 emissions during construction according to the present invention are useful for estimating CO2 emissions from construction machinery during construction work, and are particularly suitable for easily grasping the operating status of construction machinery and estimating CO2 emissions. [Explanation of symbols]

[0044] 10. Estimation system for CO2 emissions during construction 12 Heavy machinery (construction machinery) 14 Vibration Recording Device 16 Information equipment

Claims

1. CO emissions from construction machinery during construction work 2 1. A method for estimating emissions, comprising: Before starting construction work, attaching a vibration recording device to a construction machine; a step of recording vibrations of the construction machine in the vibration recording device during construction work; After the construction work is completed, removing the vibration recording device from the construction machine; transferring the vibration data recorded in the removed vibration recording device to an information device; CO based on the data transferred by the information device 2 and a step of estimating the amount of CO emissions during construction. 2 Methods for estimating emissions.

2. The step of transferring the data to the information device includes: and a step of connecting the vibration recording device removed from the construction machine to the information device and transmitting the data from the connected vibration recording device to the information device.

2. The method according to claim 1, wherein the CO 2 Methods for estimating emissions.

3. The step of transferring the data to the information device includes: and a step of reading the data displayed on the vibration recording device removed from the construction machine by image recognition.

2. The method according to claim 1, wherein the CO 2 Methods for estimating emissions.

4. a step of transferring identification information for identifying the construction machine to the information device; The step of estimating the amount of CO2 emissions includes estimating the amount of CO2 emissions based on the data transferred by the information device and the identification information. 2 Estimate emissions 2. The method according to claim 1, wherein the CO 2 Methods for estimating emissions.

5. CO emissions from construction machinery during construction work 2 1. A method for estimating emissions, comprising: recording first data indicating the cumulative operating time of the construction machine before the start of construction work; recording second data indicating the accumulated operating time of the construction machine after the construction work is completed; transferring the first data and the second data to an information device; A CO is generated based on the first data and the second data transferred by the information device. 2 and estimating the amount of emissions. CO2 during construction 2 Methods for estimating emissions.

6. CO emissions from construction machinery during construction work 2 1. A system for estimating emissions, comprising: a vibration recording device that is attached to the construction machine before the start of construction work and records vibrations of the construction machine during construction work; and an information device that transfers the vibration data recorded in the vibration recording device that is removed from the construction machine after the construction work is completed, The information device may then use the CO 2 CO emissions during construction characterized by estimating 2 Emissions estimation system.

7. CO emissions from construction machinery during construction work 2 1. A system for estimating emissions, comprising: an operating time recording device that records first data indicating the accumulated operating time of the construction machine before the start of construction work and second data indicating the accumulated operating time of the construction machine after the completion of construction work; an information device that transfers the first data and the second data recorded in the operating time recording device, The information device performs CO based on the transferred first data and second data. 2 CO emissions during construction characterized by estimating 2 Emissions estimation system.

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