Work management system, work management method, and program

Abstract

To provide a work management system, a work management method, and a program, which can improve safety of work within a management object region while simplifying a device configuration.SOLUTION: A work management system 1 comprises: a transmitter 2 that is provided on a mobile body M used in a management object region and transmits a transmission signal; a terminal device 4 that is carried by a staff member staying in the management object region, receives the transmission signal, and transmits communication data including radio wave intensity of the transmission signal; and a management device 10 that acquires the communication data, and calculates a distance between the terminal device and the transmitter on the basis of the radio wave intensity. The management device discriminates between an operator who operates the mobile body and a worker other than the operator among staff members on the basis of the distance, and calculates a risk of the staff member in the management object region on the basis of the number of approaches that the worker and the mobile body have moved within a predetermined range while the operator operates the mobile body.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a work management system, a work management method, and a program for performing safety management in a management area. [Background technology]

[0002] In the management area such as a logistics process or a factory, moving objects such as forklifts performing loading and unloading work and workers are mixed together. In the management area, safety measures are required to prevent contact between moving objects and workers. For example, Patent Document 1 describes a predictive collision avoidance system that issues a predetermined warning when the distance between a forklift and a worker is within a standard range.

[0003] This predictive collision avoidance system includes a sensor mounted on the forklift that transmits a signal, a receiver that receives the signal, a controller that communicates with the receiver and calculates the distance between the sensor and the receiver, and a projection device that generates a warning such as lighting if the distance is within a specified range. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-228284 A Summary of the Invention [Problem to be solved by the invention]

[0005] According to the technology described in Patent Document 1, when constructing a system, predetermined sensors, receivers, projection devices, etc. are required, and there is a risk of an increase in costs due to the introduction of such equipment.

[0006] An object of the present invention is to provide a work management system, a work management method, and a program that can improve the safety of work within a managed area while simplifying the device configuration. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides a method and apparatus for managing a mobile device that is used in a management area and includes a transmitter that transmits a transmission signal, a terminal device that is carried by a person staying in the management area and receives the transmission signal and transmits communication data including the radio wave intensity of the transmission signal, and a management device that acquires the communication data and calculates a distance between the terminal device and the transmitter based on the radio wave intensity, and the management device calculates the distance between the terminal device and the transmitter based on the distance. Before Distinguishing between an operator who operates the moving object and other workers, If the determination indicates that the distance between the moving object and the terminal device is within a predetermined value and the state where the distance is within the predetermined value continues for a predetermined period of time or more, it is determined that the holder of the terminal device is the operator; The work management system calculates the risk to the personnel in the managed area based on the number of times the worker and the mobile object move within a predetermined range while the operator is operating the mobile object.

[0008] According to the present invention, the distance between the transmitter and the terminal device is calculated based on the radio wave strength in communication between the transmitter and the terminal device, and it is possible to distinguish between a worker and an operator of a mobile body based on the distance.

[0009] In addition, the management device of the present invention may be configured to determine that the holder of the terminal device is the operator when the distance between the moving body and the terminal device is within a predetermined value and the state where the distance is within the predetermined value continues for a predetermined period of time or more.

[0010] According to the present invention, it is possible to easily distinguish between a worker and an operator of a moving object based on the distance and duration.

[0011] The management device of the present invention may be configured to calculate the risk of the operators based on a ratio of the individual number of approaches of each operator to the total number of approaches.

[0012] According to the present invention, the risk to an operator in a management target area can be evaluated using a simple method.

[0013] The management device of the present invention may be configured to calculate the risk of the worker based on a ratio of the individual number of approaches of each worker to the total number of approaches.

[0014] According to the present invention, the risk to a worker in a managed area can be evaluated using a simple method.

[0015] In addition, the managed area of ​​the present invention may be classified into a plurality of work areas according to the work content, and the management device may be configured to calculate the risk weighted according to the work area.

[0016] According to the present invention, the fairness of risk assessment can be ensured even if the work content differs in each work area within a management target area.

[0017] The management device of the present invention may be configured to generate warning content according to the risk.

[0018] According to the present invention, by notifying each operator and worker of the warning content, it is possible to draw attention to risks in the work and provide feedback for improving the work content.

[0019] In one aspect of the present invention, a transmission signal is transmitted from a transmitter provided in a mobile object used in a management area, the transmission signal is received by a terminal device carried by a person staying in the management area, and communication data including radio wave intensity of the transmission signal is transmitted, the communication data is acquired, a distance between the terminal device and the transmitter is calculated based on the radio wave intensity, and the number of people staying in the management area is calculated based on the distance. Before Distinguishing between an operator who operates the moving object and other workers, If the determination indicates that the distance between the moving object and the terminal device is within a predetermined value and the state where the distance is within the predetermined value continues for a predetermined period of time or more, it is determined that the holder of the terminal device is the operator; calculating a risk of the operator in operating the moving object based on a number of times that the worker and the moving object move within a predetermined range while the operator is operating the moving object; Computer-generated It is a work management method.

[0020] According to the present invention, it is possible to distinguish between a worker and an operator of a moving object using a simple method.

[0021] According to one aspect of the present invention, a computer is caused to calculate a distance between a terminal device carried by a worker staying in the managed area that receives a transmission signal from a transmitter provided in a mobile object used in the managed area, based on the radio wave intensity of the transmission signal, and the transmitter, and to calculate a number of personnel staying in the managed area based on the distance. Before Distinguishing between an operator who operates the moving object and other workers, When the determination indicates that the distance between the moving body and the terminal device is within a predetermined value and the state where the distance is within the predetermined value continues for a predetermined time or more, the holder of the terminal device is determined to be the operator; The work management program calculates a risk involved in the operation of the moving object by the operator based on the number of times the worker and the moving object move within a predetermined range while the operator is operating the moving object.

[0022] According to the present invention, it is possible to distinguish between a worker and an operator of a moving body through simple processing, thereby reducing the computational load. Effect of the Invention

[0023] According to the present invention, it is possible to improve the safety of work within a management target area while simplifying the device configuration. [Brief description of the drawings]

[0024] [Figure 1] FIG. 2 is a diagram showing a configuration of a management target area according to the embodiment of the present invention; [Diagram 2] FIG. 1 is a block diagram showing a configuration of a work management system. [Diagram 3] FIG. 11 is a diagram showing the relationship between communication distance and received radio wave intensity. [Figure 4] FIG. 13 is a diagram showing the number of times an operator and a worker approach each other. [Diagram 5] FIG. 13 is a diagram showing the calculation results of the risk of an operator. [Figure 6] FIG. 13 is a diagram showing the calculation results of the risk of a worker. [Figure 7] 10 is a flowchart showing a flow of processing executed in the management device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A work management system, a work management method, and a program according to an embodiment of the present invention will now be described with reference to the accompanying drawings. The work management system, for example, manages the safety of a management target area.

[0026] As shown in FIG. 1, the managed area R is, for example, a place where loading and unloading work is carried out, such as a warehouse or factory that stores items in the logistics process. The managed area R is classified into a plurality of work areas Rn (n: natural number) according to the work content. In each work area Rn, work such as storing, packing, delivering, and processing of items is carried out. In the managed area R, for example, a moving object M operated by an operator D and a worker W are mixed. The moving object M may be, for example, a forklift driven by the operator D, a vehicle other than a forklift, or a work machine.

[0027] 2, the work management system 1 includes, for example, a transmitter 2 provided on a moving object M, a terminal device 4 that communicates with the transmitter 2, and a management device 10 that performs safety management of a worker W. The moving object M is, for example, a forklift used within a managed area R. A plurality of moving objects M exist within the managed area R. A large number of workers W exist within the managed area R.

[0028] The transmitter 2 is provided on a forklift. The transmitter 2 is, for example, a radio wave beacon (BLE beacon) that transmits a predetermined transmission signal at a predetermined timing. The transmitter 2 adds ID information to the transmission signal and transmits it. The ID information is, for example, a MAC address. ID information other than a MAC address may be used as long as individual identification is possible. The transmitter 2 communicates with a large number of terminal devices 4, for example, by Bluetooth (registered trademark). Even if there are multiple transmitters 2, the terminal device 4 can communicate with each transmitter 2 individually based on the ID information added to the received transmission signal.

[0029] The terminal device 4 is carried by personnel staying in the management target area R. The personnel include at least an operator D of the moving body M and a worker W other than the operator D. The terminal device 4 is a mobile communication terminal device constituted by, for example, a smartphone, a tablet terminal, or the like. An application that performs predetermined communication based on a radio wave beacon transmitted by the transmitter 2 is installed in the terminal device 4.

[0030] The transmitter 2 and the terminal device 4 establish communication, for example, by BLE communication. The transmitter 2 scans the surroundings and receives an advertising signal transmitted by the terminal device 4 at a predetermined timing. The advertising signal includes MAC address data. When the transmitter 2 receives the advertising signal, it acquires data of the MAC address and a received signal strength indicator (RSSI) indicating the received radio wave strength. The RSSI becomes weaker as the distance between the terminal device 4 and the transmitter 2 increases. The transmitter 2 transmits a connection request to the terminal device 4 based on the received advertising signal. The terminal device 4 receives the connection request and switches to one-to-one connection communication with the transmitter 2 (GATT (Generic attribute profile) communication).

[0031] The transmitter 2 and the terminal device 4 may perform pairing communication by Bluetooth. Upon receiving a transmission signal transmitted by the transmitter 2, the terminal device 4 performs a predetermined communication with the transmitter 2 based on the ID information to establish individual communication. In Bluetooth pairing, the terminal device 4 and the transmitter 2 generate a communication path. After pairing, the terminal device 4 and the transmitter 2 correct the radio wave strength to stabilize communication. The terminal device 4 receives the transmission signal and measures the radio wave strength of the transmission signal. The terminal device 4 acquires, for example, a Received Signal Strength Indicator (RSSI) value indicating the strength of the transmission signal after pairing with the transmitter 2. The RSSI becomes weaker as the distance between the terminal device 4 and the transmitter 2 increases.

[0032] The transmitter 2 and the terminal device 4 may communicate with each other using a communication method other than Bluetooth. The transmitter 2 may communicate with a plurality of terminal devices 4 using, for example, ZigBee (registered trademark) or wireless LAN. The communication between the transmitter 2 and the terminal device 4 may use another wireless communication method as long as the plurality of terminal devices 4 can communicate with the transmitter 2 at the same time.

[0033] The terminal device 4 transmits communication data including the radio wave intensity of the received transmission signal to the management device 10 via the network N. The network N is, for example, a wireless LAN installed in the management target area R, a public mobile phone network, individual communication means such as Bluetooth, or a communication means realized by a combination of these. The terminal device 4 transmits the communication data to the management device 10 periodically (for example, every 10 minutes) or at a predetermined timing.

[0034] The management device 10 acquires communication data transmitted by the terminal device 4 via the network N. The management device 10 is an information processing device realized by, for example, a personal computer, a tablet terminal, a smartphone, etc. The management device 10 includes, for example, a calculation unit 12 that performs various calculations related to safety management, a storage unit 14 that stores programs and data necessary for the calculations, and a display unit 16 that displays information related to safety management based on the calculation results.

[0035] The calculation unit 12 is realized by a processor such as a CPU (Central Processing Unit) executing a program stored in a program memory. In addition, a part or the whole of the calculation unit 12 may be realized by hardware such as an LSI (Large Scale Integration), an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-Programmable Gate Array), or may be realized by software and hardware working together.

[0036] The storage unit 14 is realized by, for example, a hard disk drive (HDD), a flash memory, an electrically erasable programmable read only memory (EEPROM), a read only memory (ROM), or a random access memory (RAM), or a hybrid storage device using a plurality of these. The storage unit 14 also stores various programs such as firmware and application programs, and processing results by various functional units. A part or the whole of the storage unit 14 may be realized by an external storage device accessible by the management device 10 via the network N. The external storage device is, for example, a network attached storage (NAS) device.

[0037] Next, a process executed by the management device 10 will be described. The calculation unit 12 calculates the distance between the terminal device 4 and the transmitter 2 based on RSSI data indicating radio wave intensity included in the communication data. When multiple transmitters 2 are installed within the management target area R, the calculation unit 12 may estimate the position of the terminal device 4 based on the RSSI data received from the multiple transmitters 2.

[0038] As shown in Fig. 3, there is a correlation between the strength of the received radio wave and the communication distance such that the strength of the received radio wave decreases as the communication distance increases. This correlation is set as a predetermined function (d = f (v), where d is distance and v is radio wave strength) based on data acquired by a previously conducted experiment. Mapping data showing the correlation between the strength of the received radio wave and the communication distance may be used instead of the predetermined function. The predetermined function and mapping data are stored in the storage unit 14. The calculation unit 12 uses the predetermined function and mapping data to calculate the communication distance corresponding to the acquired RSSI data.

[0039] The calculation unit 12 distinguishes between an operator D operating the moving object M and other workers W among the personnel present in the management target area R based on the calculated distance. For example, when the distance between the moving object M and the terminal device 4 is within a predetermined range (e.g., 1 m) and the state where the distance is within a predetermined value continues for a predetermined time (e.g., 1 minute) or more, the calculation unit 12 determines that the holder of the terminal device 4 is the operator D of the moving object M. The calculation unit 12 determines that the holder of a terminal device 4 other than the terminal device 4 held by the operator D is a worker W.

[0040] The calculation unit 12 judges that there has been "approach" when the worker W and the moving body M move within a predetermined range (for example, 1 m) every predetermined period (for example, one week) while the operator D is operating the moving body M. When approach occurs, the calculation unit 12 counts the number of times as the number of approaches, stores it in the storage unit 14, and creates a database.

[0041] As shown in FIG. 4, the calculation unit 12 counts the number of times that the worker W and the moving object M during operation move within a predetermined range for each predetermined period (e.g., one month) based on the database, and generates an aggregation map Q. The number of times of approach is counted in the aggregation map Q. The aggregation map Q is displayed, for example, on the display unit 16. The calculation unit 12 calculates a risk of the operator D in operating the moving object M, for example, based on the aggregation map Q. The risk may be evaluated, for example, simply based on the number of times that the worker W and the moving object M during operation move within a predetermined range. The risk is set, for example, for each of the operator D and the worker W.

[0042] As shown in FIG. 5, the calculation unit 12 calculates the ratio of the individual number of approaches of each operator D to the total number of approaches as the risk of the operator D. The calculation result is displayed, for example, on the display unit 16. In this case, the smaller the value of the risk, the safer the risk is evaluated. The method of calculating the risk is one example, and other evaluation methods may be used as long as they can obtain results according to the number of approaches, not just the ratio of the number of approaches. As shown in the figure, for example, the ratio of the number of approaches of the operator D (3) is higher than the ratio of the number of approaches of the other operators D. In this case, the operator D (3) is determined to have a relatively high risk of contact with the worker W when operating the moving body M.

[0043] 6, the calculation unit 12 calculates the ratio of the individual number of approaches of each worker W to the total number of approaches as the risk of the worker W, similar to the calculation of the risk of the operator D. The calculation result is displayed, for example, on the display unit 16. As shown in the figure, for example, the ratio of the number of approaches of the worker W (11) is larger than the ratios of the number of approaches of the other workers W. In this case, the worker W (11) is determined to have a relatively high risk of contact with the moving body M while working in the managed area R.

[0044] The calculation unit 12 generates warning contents according to the degree of risk based on the calculation result. The warning contents may be a stepwise rank preset according to the degree of risk, or a message showing the warning contents according to the degree of risk. The calculation unit 12 causes transmission data including the warning contents to be transmitted to the terminal device 4 carried by the operator D and worker W who are determined to be at a relatively high risk. The operator D and worker W can reconfirm the work contents based on the warning contents displayed on the terminal device 4, and provide feedback to reduce the risk in the work.

[0045] As described above, the management target area R is classified into a plurality of work areas Rn according to the work content. For example, a work area Rn with a high density of workers W has a different risk from a work area Rn with a low density of workers W. Also, a work area Rn with a relatively low average speed of moving objects M has a different risk compared to a work area Rn with a relatively high average speed of moving objects M.

[0046] The calculation unit 12 may calculate the risk for each work area Rn. When the risks to the operator D and the worker W are managed in a unified manner in the entire management target area R, the calculation unit 12 may weight the risks according to the work area Rn and calculate the risks to the operator D and the worker W. In addition, when the calculation unit 12 determines an approach in real time, the calculation unit 12 may cause the terminal device 4 to transmit a warning of the approach. In this case, the calculation unit 12 may cause the terminal device 4 to transmit a warning of the approach when the approach reaches a predetermined range. The calculation unit 12 may generate a display showing the relationship between the number of approaches and the location of the approach in a floor plan for each work area Rn, and display the display on the display unit 16.

[0047] Next, the flow of processing of the work management method executed in the work management system 1 will be described.

[0048] FIG. 7 shows a flowchart illustrating the flow of processing executed by the management device 10. A moving object M used in the management area R is provided with a transmitter 2. The transmitter 2 transmits a transmission signal at a predetermined timing (step S100). Personnel staying in the management area R carry a terminal device 4. The terminal device 4 receives the transmission signal (step S102). The terminal device 4 transmits communication data including the radio wave intensity of the transmission signal (step S104). The management device 10 acquires the communication data (step S106).

[0049] The management device 10 calculates the distance between the terminal device 4 and the transmitter 2 based on the radio wave intensity data included in the communication data. The management device 10 distinguishes between the operator who operates the mobile object and the other workers based on the distance (step S108). The management device 10 calculates the risk of the operator in operating the mobile object based on the number of times the worker and the mobile object move within a predetermined range while the operator is operating the mobile object (step S110).

[0050] In the above process, in the management device 10, the work management program causes the computer to execute the following process. Based on the radio wave intensity of a transmission signal transmitted from the transmitter 2 provided on a moving body M used in the management area R, the work management program calculates the distance between the terminal device 4 carried by a worker W staying in the management area R that received the transmission signal and the transmitter 2. Based on the distance, the work management program distinguishes between an operator D operating the moving body M and other workers W among the personnel staying in the management area R. Based on the number of times that the worker W and the moving body M move within a predetermined range while the operator D is operating the moving body M, the work management program calculates the risk of the operator D in operating the moving body M.

[0051] As described above, the work management system 1 is configured with a transmitter 2 configured with a BLE beacon or the like, and a terminal device 4 such as a smartphone, and can greatly simplify the device configuration. The work management system 1 can easily distinguish between a worker W and an operator D of a moving object M based on radio wave intensity. The work management system 1 can calculate the risk that occurs within the management target area R using a simple algorithm based on the number of approaches, and can increase the processing speed.

[0052] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be modified as appropriate without departing from the spirit of the present invention. For example, the work management system may be applied to equipping personnel with transmitters to determine the number of times the personnel approach, and to evaluate the risk of infection. [Explanation of symbols]

[0053] 1 Work Management System 2 Transmitter 4 Terminal Equipment 10 Management device 12 Arithmetic section 14 Storage section 16 Display section D Operator LAN wireless M Mobile object N Network Q Aggregation Map R Managed Area Rn work area W Worker

Claims

1. A transmitter provided in a mobile object used in a management area and configured to transmit a transmission signal; a terminal device carried by a person staying in the management area, for receiving the transmission signal and for transmitting communication data including the radio wave intensity of the transmission signal; a management device that acquires the communication data and calculates a distance between the terminal device and the transmitter based on the radio wave intensity, The management device distinguishes between the personnel who are operators operating the mobile object and other workers based on the distance, and if the distance between the mobile object and the terminal device is within a predetermined value and the state within the predetermined value continues for more than a predetermined time, it determines that the owner of the terminal device is the operator, and calculates the risk of the personnel in the managed area based on the number of times the worker and the mobile object move within a predetermined range while the operator is operating the mobile object.

2. the management device calculates the risk of the operator based on a ratio of the individual number of approaches of each of the operators to the total number of approaches. The work management system according to claim 1 .

3. the management device calculates the risk of the worker based on a ratio of the individual number of approaches of each worker to the total number of approaches. The work management system according to claim 1 or 2.

4. The management area is classified into a plurality of work areas according to the work contents, The work management system according to claim 1 , wherein the management device calculates the risk weighted according to the work area.

5. The work management system according to claim 1 , wherein the management device generates a warning content according to the risk.

6. Transmitting a transmission signal from a transmitter provided in a mobile object used in a management area; receiving the transmission signal by a terminal device carried by a person staying in the management area and transmitting communication data including the radio wave intensity of the transmission signal; acquiring the communication data, and calculating a distance between the terminal device and the transmitter based on the radio wave intensity; Based on the distance, distinguish between operators who operate the moving object and other workers among the personnel; If the determination indicates that the distance between the moving object and the terminal device is within a predetermined value and the state where the distance is within the predetermined value continues for a predetermined period of time or more, it is determined that the holder of the terminal device is the operator; A work management method performed by a computer, which calculates a risk involved in the operation of the moving object by the operator based on the number of times the worker and the moving object move within a predetermined range while the operator is operating the moving object.

7. On the computer, calculating a distance between a terminal device carried by an operator staying in the management area that receives a transmission signal from a transmitter provided in a mobile object used in the management area, based on a radio wave intensity of the transmission signal; and Based on the distance, distinguish between operators who operate the moving object and other workers among the personnel staying in the management area; When the determination indicates that the distance between the moving body and the terminal device is within a predetermined value and the state where the distance is within the predetermined value continues for a predetermined time or more, the holder of the terminal device is determined to be the operator; A work management program that calculates a risk involved in the operation of the moving object by the operator based on the number of times the worker and the moving object move within a predetermined range while the operator is operating the moving object.

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