KR20210123483A - Apparatus for Monitoring Construction Site and Driving Method Thereof - Google Patents

Abstract

The present invention relates to a workspace monitoring device and a driving method thereof. According to an embodiment of the present invention, the workspace monitoring device includes: a storage unit provided inside the work space to store group information which divides a plurality of scanner devices communicating with surrounding communication devices into groups; and a control unit which determines for each group a signal state of the communication device whose location has been changed, received from the scanner device of each group, based on the stored group information, and finally determines the location change based on a group-by-group determination result. Accordingly, it is possible to accurately measure and monitor positions of workers.

Description

Workspace monitoring device and driving method of the device {Apparatus for Monitoring Construction Site and Driving Method Thereof}

The present invention relates to a work space monitoring apparatus and a method of driving the apparatus, and more particularly, by accurately measuring the positions of workers who are working in consideration of the characteristics of the work site in, for example, a tunnel of a closed space or a work space inside a building. It relates to a work space monitoring device capable of monitoring and a method of driving the device.

Recently, in order to monitor the safety of workers and events occurring at the work site in real time at various work sites, the network is connected between the central control server and the beacon-bearing workers at the work site, and various information can be displayed on the display screen in real time. A monitoring system is being used. The most important of these monitoring items at the work site is to identify the location and number of workers. In the external work space, the location of the worker can be confirmed using GPS information using the worker's smartphone, but the worker cannot enter the tunnel or inside the building. When moving, it is sometimes not possible to ascertain the individual location and number of workers inside a tunnel or building.

In particular, when moving through a vehicle in a tunnel, etc., in most cases, it is difficult to determine the location and number of workers (e.g., identity of workers) who have beacon devices located inside the moving vehicle with only beacon scanners located at regular intervals inside the tunnel. am. In the case of a beacon owned by a worker located inside the vehicle, the signal is disturbed by the moving speed and the vehicle structure, so the signal strength is weak, so the beacon scanner cannot recognize it, or the signal bounces due to the characteristics of the inside of the tunnel.

Korean Patent Publication No. 10-1054937 (2011.08.01)

An embodiment of the present invention provides a work space monitoring device capable of accurately measuring and monitoring the positions of workers who are working in consideration of the characteristics of a work site, for example, in a tunnel of a closed space or a work space inside a building, and a method of driving the device. The purpose is to provide.

A workspace monitoring apparatus according to an embodiment of the present invention includes a storage unit configured to store group information that is provided inside a workspace and classifies a plurality of scanner devices communicating with a peripheral communication device into each group, and the communication device. When the location of is changed, the signal state of the communication device with the changed location received from the scanner device of each group is determined for each group based on the stored group information, and finally the location change is determined based on the determination result for each group It includes a control unit that

The control unit may determine the number of times of signal reception of the communication device or the total amount of data received from the scanner devices constituting each group in order to determine the signal state for each group.

When the signal state of the communication device is sensed in a plurality of groups, the control unit may calculate a final change position of the communication device based on the group having the largest number of times of signal reception or the total amount of received data.

The controller may ignore the change in the location of the communication device when the number of times of signal reception or the total amount of data is the same in a plurality of groups.

When the signal state of the communication device whose position has been changed in one group is sensed, the controller may further determine whether it is an outer group adjacent to the entrance/exit of the work space to determine the final change position of the communication device.

The control unit may change a location measurement method of the communication device when the location of the communication device is detected as the outer group.

In addition, in the method of driving a workspace monitoring apparatus according to an embodiment of the present invention, the storage unit stores group information in which a plurality of scanner devices that are provided inside the workspace and communicate with the surrounding communication devices into groups are divided into groups. and the control unit, when the location of the communication device is changed, based on the stored group information, the signal state of the communication device with the changed location received from the scanner device of each group is determined for each group by group and finally determining a location change based on the result.

The determining may include determining the number of times of signal reception of the communication device or the total amount of data received by the scanner devices constituting each group in order to determine the signal state for each group.

In the determining step, when the signal state of the communication device is detected in a plurality of groups, calculating the final change position of the communication device based on the group having the largest number of signal reception times or the total amount of data received is further may include

The driving method may further include ignoring a change in the position of the communication device when the same number of times of signal reception or the total amount of data is sensed in a plurality of groups.

The driving method further includes determining the final change position of the communication device by further determining whether it is an outer group adjacent to the entrance/exit of the work space when the signal state of the communication device whose position has been changed in one group is detected can do.

The driving method may further include changing a location measurement method of the communication device when the communication device is detected as the outer group.

According to an embodiment of the present invention, accurate monitoring of the moving position or number of workers or vehicles can be made by locating the positions of workers or work vehicles in consideration of the construction environment during closed tunnel construction or construction inside buildings. .

1 is a view showing a workspace monitoring system according to an embodiment of the present invention;
2 is a view illustrating a monitoring screen of the workspace monitoring device of FIG. 1;
3 and 4 are diagrams for explaining the process of positioning a worker in the workspace;
5 is a block diagram illustrating a detailed structure of the workspace monitoring device of FIG. 1;
6 is a flowchart illustrating a workspace monitoring process according to an embodiment of the present invention, and
7 is a flowchart illustrating a workspace monitoring process according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Prior to the detailed description, the following describes a communication device or a scanner device communicating with the communication device as an example, but, of course, the scanner device may be a communication intermediary device. Considering the saving aspect of construction cost, the communication device may preferably be a beacon device, and thus the scanner device may be called a beacon scanner. Various communication devices may be used in the embodiment of the present invention without departing from the technical idea.

1 is a diagram showing a workspace monitoring system according to an embodiment of the present invention, FIG. 2 is a diagram illustrating a monitoring screen of the workspace monitoring device of FIG. 1, and FIGS. 3 and 4 are a worker positioning process in the workspace It is a drawing for explaining.

1, the workspace monitoring system 90 according to the embodiment of the present invention includes a communication device (or beacon device) 100, a scanner device (or beacon scanner) 105, a communication network 110 and Some or all of the workspace monitoring device 120 is included.

Here, “including some or all” means that some components such as the communication network 110 are omitted so that the scanner device 105 and the workspace monitoring device 120 perform direct communication (eg, P2P communication, etc.) or , a part or all of the workspace monitoring device 120 may be configured by being integrated into a network device (eg, a wireless switching device, etc.) constituting the communication network 110, to help a sufficient understanding of the invention In order to be described as including all.

The communication device 100 according to an embodiment of the present invention is used to confirm the location of a worker or a vehicle in a work space (or construction site). Accordingly, the communication device 100 may be provided as a worker device, such as a work hat, work belt, work clothes, etc. worn by workers, and may include, for example, a separate dedicated terminal capable of beacon communication provided when workers are put into the work space. have. Of course, a user terminal device such as a smart phone possessed by the workers may be used, and a wearable device such as a necklace or bracelet, or a domestic S company's Galaxy*Gear may be used. Of course, as mentioned above, the communication device 100 performs beacon communication with a nearby beacon scanner, that is, the scanner device 105, and in consideration of saving aspects such as construction cost, a device that performs beacon communication and one-way communication may be used.

A beacon is a wireless communication device that can automatically recognize a smart device in a short distance and transmit necessary data. Also called Bluetooth beacon. Beacons can operate at a distance of up to 50 m. That is, it can be seen that the communication radius reaches a maximum of 50 m. If beacon technology is used, data such as discount coupons or detailed descriptions can be transmitted to the smartphone of customers who have visited shopping centers, restaurants, museums, art galleries, movie theaters, and baseball fields. Brutus 1.2 was able to achieve a transmission speed of 700kbit/s, and 2.0 was improved to a maximum of 3Mbit/s. Furthermore, Bluetooth 3.0 has again improved the transmission speed to 24Mbit/s. In 2010, Bluetooth 4.0 was developed with the main goal of low power consumption. Previous Bluetooth technologies supported two-way communication so that data could be exchanged between devices, which was still possible in Bluetooth 4.0. However, the main feature of Bluetooth 4.0 is that one-way communication is also possible. This one-way communication allows a Bluetooth device to transmit information while not having to wait to receive it. In this way, the beacon does not require a pairing connection like previous Bluetooth devices and has new uses.

The communication device 100 is used for location estimation as in the embodiment of the present invention in addition to advertisements or health care. When you want to estimate the location inside a specific building, if you install several beacons in each room, you can determine the location of the user within about 2m. Since a Bluetooth beacon can transmit a Received Signal Strength Indicator (RSSI) value, the distance between the beacon and a terminal (eg, a scanner device, etc.) can be estimated by using the previously known output signal strength and signal strength of the beacon. However, such an approximation has a significant error, so other techniques are required for accurate location estimation.

In particular, when the communication device 100 is used in an enclosed space, such as tunnel construction, as in the embodiment of the present invention, there are too many communication obstacles, which makes accurate location estimation more difficult. Of course, in the embodiment of the present invention, it may be possible to use the communication device 100 by replacing it with another communication device capable of short-range communication. However, in the embodiment of the present invention, the beacon device is used in consideration of the construction cost required to build the system in the work space. Since it is possible to replace and use the communication device as much as possible, the embodiment of the present invention will not be particularly limited to the beacon communication of the communication device 100 .

However, in the embodiment of the present invention, it is possible to set or adjust the transmission time or period of a beacon signal (or beacon data), that is, a communication signal in the communication device 100 used in the workspace. Of course, this is set as a default when the communication device 100 is manufactured and the product is shipped, but it is possible to adjust the cycle according to the request of the workspace monitoring device 120 through programming. For example, a transmission period of a beacon signal may be considered important according to an embodiment of the present invention. In other words, if the communication device 100 of the workspace transmits the beacon signal several times for a specified time and the scanner device 105 receives all of them, the scanner device 105 or the group including the scanner device 105 This is because it can be considered primarily to determine the location of the worker or vehicle. More details will be dealt with later.

The scanner device 105 may be called a beacon scanner when performing beacon communication with the communication device 100 . As can be seen in FIGS. 1 to 4 , for example, in the case of tunnel construction, each block used to form a tunnel, such as a semi-circular cement structure, has various lengths such as 100 m, 200 m, 300 m, etc. can be formed. Each of these blocks can be connected to each other and constituted inside the tunnel. Of course, the size of each block can be configured in various ways depending on whether the tunnel is composed of two lanes or four lanes in the width, which is the direction perpendicular to the traveling direction of the vehicle. Accordingly, in FIG. 1, for convenience of explanation, it is shown that the scanner device 105 is provided on both sides of each block. In other words, it has been exemplified that two scanner devices 105 are provided on both sides of each block. Of course, since this can be variously modified according to the intention of the tunnel workspace or system designer, the embodiment of the present invention will not specifically limit the configuration of the scanner device 105 .

The scanner device 105 is provided on the inner surface of each block in the tunnel of the work space to receive a beacon signal from the surrounding communication device 100 . For example, since the communication device 100 has a communication radius of 50 m in the case of beacon communication, it can be seen that a signal is received when it is within 50 m of the scanner device 105 . Of course, the reception strength (RSSI) of the signal will be different depending on the distance. If the communication device 100 has a communication radius of 100 m, the scanner device 105 receives a beacon signal from the communication device 100 in the vicinity when it is within the radius. The scanner device 105 receives the communication signal of the communication device 100 recognized in the vicinity and transmits it to the workspace monitoring device 120 of FIG. 1 together with its identification information, for example, the device ID.

It can be seen that the scanner device 105 serves as an intermediary device for transmitting a communication signal of the communication device 100 , that is, a beacon signal to the workspace monitoring device 120 . Of course, the scanner device 105 preferably performs one-way communication with the communication device 100, but in some cases, that is, in the case of a specific workspace, the scanner device 105 may operate to perform two-way communication. For example, although it is representative when the construction guide information is transmitted, it may be used to change the signal transmission period of the communication device 100 in the embodiment of the present invention. Of course, this signal transmission period is preferably adjusted collectively before the workers are put into the work space, but may be changed during the work. For example, when the communication environment of the tunnel work space is poor or when it suddenly deteriorates during construction, the signal is frequently transmitted. In general, the beacon signal transmits a signal in units of 0.5 to 1 second. The beacon signal includes identification information of the communication device 100 and is transmitted, and the data capacity of the identification information is different. This has already been described above. For example, Bluetooth 3.0 occupies a size or capacity of 24 Mbit/s. That is, data of 24 Mbit per second can be transmitted. Of course, time information may be included in the beacon signal during signal transmission.

The communication network 110 may further include an access point installed at the tunnel entrance of the work space 97 at the initial stage of construction by a construction company performing construction, etc. as well as a communication network of a key communication company. The communication network 110 includes both wired and wireless communication networks. For example, a wired/wireless Internet network may be used or interlocked as the communication network 110 . Here, the wired network includes an Internet network such as a cable network or a public telephone network (PSTN), and the wireless communication network includes CDMA, WCDMA, GSM, Evolved Packet Core (EPC), Long Term Evolution (LTE), and Wibro networks. meaning to include Of course, the communication network 110 according to the embodiment of the present invention is not limited thereto, and may be used, for example, in a cloud computing network under a cloud computing environment, a 5G network, and the like. For example, when the communication network 110 is a wired communication network, the access point in the communication network 110 can connect to a switching center of a telephone company. or by connecting to various repeaters such as Base Station Transmission (BTS), NodeB, and e-NodeB to process data.

The communication network 110 may include an access point. Here, the access point includes a small base station such as a femto or pico base station that is often installed in a building. Femto or pico base stations are classified according to the maximum number of scanner devices 105, etc. that can be connected to the classification of small base stations. Of course, the access point may include a short-distance communication module for performing short-range communication such as Bluetooth, Zigbee, and Wi-Fi with the communication device 100 . The access point may use TCP/IP or Real-Time Streaming Protocol (RTSP) for wireless communication. Here, short-range communication may be performed in various standards such as Bluetooth, Zigbee, infrared, radio frequency (RF) such as ultra high frequency (UHF) and very high frequency (VHF), and ultra-wideband communication (UWB) in addition to Wi-Fi. Accordingly, the access point can extract the location of the data packet, designate the best communication path for the extracted location, and forward the data packet to the next device, for example, the workspace monitoring device 120 along the designated communication path. The access point may share several lines in a general network environment, and includes, for example, a router, a repeater, and a repeater.

The work space monitoring device 120 may monitor the position of a worker or a vehicle in the work space 97 such as tunnel construction of FIG. 1 . The number of workers or vehicles in the workplace must be confirmed before the number can be determined. Of course, the number may be determined even if the location is not confirmed. In addition, the work space monitoring device 120 may check the work environment in the work space 97 by analyzing sensing data acquired through a sensor (eg, a harmful gas sensor, etc.) of the work space 97 . For example, when a factor that can adversely affect the communication environment increases due to blasting work in the work space 97 or the number of work vehicles causes a lot of radio interference, signal transmission of the communication device 100 Because the cycle can be changed. However, in the embodiment of the present invention, grouping is performed on a plurality of scanner devices 105 in the tunnel work space 97 to process the beacon signal of the communication device 100 and to determine the position of the operator or vehicle through this. We would like to look at this in more detail.

The work space monitoring device 120 may set additional groups when the scanner device 105 is installed according to the progress of construction in the work space 97 of the tunnel. Of course, the identification information of the scanner device 105 is matched and stored in each group. A corresponding group may consist of only one scanner device 105 . However, in the embodiment of the present invention, it is preferable to form a scanner device group composed of at least two or more scanner devices 105 . As can be seen in FIGS. 3 and 4, block A is the most adjacent scanner device group at the entrance. The corresponding group may be called an exit scanner group or an outer group. A scanner device group other than the outer group may be a positioning scanner group. A minimum of one scanner device group may be installed per block. As mentioned above, the number of scanner device groups installed per block is set according to the actual length of the block displayed on the screen.

In other words, the working space monitoring device 120 divides the plurality of scanner devices 105 installed in the working space 97 such as tunnel construction into an outer group and a positioning group, but the positioning group is again a plurality of scanner devices 105 . It is divided into groups and the signal states of the communication devices 100 received by each scanner device 105 for each group are determined. In order to determine the signal state, it is possible to determine how often a signal of a certain communication device 100 is received, or the total amount of received data. For example, since the communication device 100 is located in the outer group and the scanner device 105 is provided on both sides, if the beacon signal of the specific communication device 100 is received by the number of transmissions from the scanner device 105 on one side, the corresponding It is possible to determine the location of the communication device 100 as being close to the location.

In addition, the workspace monitoring apparatus 120 may calculate the total amount of data according to the number of transmissions, not the number of transmissions of the beacon signal. Of course, both may be used. For example, when the scanner device 105 on one side of the two scanner devices 105 of the outer group receives the beacon signal of the specific communication device 100 5 times, the sum of the received data can be calculated accordingly, In addition, the data sum can be calculated by receiving three times from the scanner device 105 on the other side. Then, the total sum of the data calculated by the scanner devices 105 on both sides is calculated. Since the beacon signal is transmitted in units of data packets, and time information about the transmission time may be included in the packet, it is not difficult to calculate the size of the data. However, since it takes time to process the data packet, it may be easier to determine the number of times the beacon signal is received in the embodiment of the present invention.

For example, when the specific communication device 100 is located in the outer group, the workspace monitoring device 120 determines where the operator or the vehicle is located through the number of times of reception of the beacon signal, the total amount of data, or a combination thereof. can do. In addition, it is possible to finally determine the position of the operator who owns the communication device 100 by measuring the distance through the signal strength. For example, it may be possible by matching the identification information of the communication device 100 with the name of the operator when inputting the work. If you simply want to know that you are a worker, you do not need to match the name. By calculating each distance in each scanner device 105 constituting a group in order to determine an accurate position, for example, when triangulation is possible, it may be possible to more accurately determine the position of the operator.

In addition, since the workspace monitoring device 120 can determine that the specific communication device 100 is leaving the workspace 97 when it is located in the outer group, in this case, the positioning method of the communication device 100 is GPS. way can be changed. This is because the positioning method using GPS may be more accurate outside the workspace 97 . However, instead of GPS, it is possible to measure the position through a base station constituting the communication network 110 or a separate access point installed by a construction company. Positioning outside of the GPS method is not particularly limited.

Looking more closely, the workspace monitoring device 120 can set the groups for the plurality of scanner devices 105 in various forms, and typically divide the groups into an outer group and other groups, and then separate the other groups in units of blocks. The group can be set in various forms whether it is distinguished from the left and right adjacent scanner devices 105 . This may increase the group by additionally installing the scanner device 105 whenever construction progresses. In this way, when the scanner device 105 is additionally installed, the current installed position of the scanner device 105 through communication with the surrounding scanner devices 105, or through a separate application or a separate device installed on the smartphone by the on-site supervisor. It is also possible to perform an operation for setting . This is because it is possible to measure the exact position through the distance or direction with respect to the peripheral communication device 100 only when the location of the installed scanner device 105 is known. For example, when the communication device 100 is provided with an acceleration sensor or a gyro sensor, or when a smart phone possessed by an operator is further utilized, the distance or direction can be easily known, so that the location tracking may be easier. However, in the embodiment of the present invention, only the positioning performed through the beacon signal of the communication device 100 and the scanner device 105 in which the group is set will be described.

It is assumed that a plurality of groups are set other than the outer group, for example, first to third groups are set. And, suppose that each group determines the signal state of the beacon signal received from the peripheral communication device 100, for example, the number of times of signal reception or the sum of data as described above. Accordingly, it is assumed that data amounts of 30, 20, and 10 are calculated in the first to third groups, respectively. Alternatively, suppose that the data amounts of 30, 30, and 10 were calculated for each group in order. In the above two situations, that is, when the amount of data duplicated in two groups is calculated as in the latter case, the workspace monitoring device 120 determines that there is an erroneous positioning for the communication device 100 and ignores it. can On the other hand, when the total amount of data is the highest in a specific group as in the first situation, the location of the communication device 100 may be determined based on the corresponding group, and the location may be displayed on the monitoring screen, that is, the status board as shown in FIG. 2 . As mentioned above, not the total amount of data received by the group, but the number of times of signal reception may be used, and since both may be used, the embodiment of the present invention will not be particularly limited to any one form.

Of course, in the case of groups other than the outer group, signals may be detected or data may be calculated in only one group according to the location of the specific communication device 100 or group setting of the scanner device 105 . For example, the total amount of data is calculated in the form of 0, 0, and 30 for the first to third groups. In this case, the workspace monitoring apparatus 120 may further determine whether the corresponding group is an outer group. This is because, in general, when a beacon signal is detected in only one group when it is in an outer group. Therefore, the workspace monitoring device 120 calculates the location of the communication device 100 based on the scanner device 105 of the outer group or the outer group when it is an outer group, but when it is not an outer group, the corresponding group or its group The position of the communication device 100 is calculated based on the scanner device 105 of the , and displayed on the monitoring screen of FIG. 2 .

As a more specific example, FIGS. 3 and 4 show a case in which a specific work vehicle 300 or its driver is in a specific group within the tunnel and then goes outside. In this case, the work space monitoring device 120 displays the location of the work vehicle 300 as being located in a specific block on the monitoring screen, and then, when the work vehicle 300 goes outside, for example, an AP outside the tunnel or By positioning the work vehicle 300 using GPS information, it can be displayed on the monitoring screen as being located outside.

5 is a block diagram illustrating a detailed structure of the workspace monitoring apparatus of FIG. 1 .

5, the workspace monitoring apparatus 120 according to the embodiment of the present invention includes a communication interface unit 500, a control unit 510, a positioning group execution unit (or monitoring execution unit) 520 and storage. part or all of part 530 .

Here, “including some or all” means that some components such as the storage unit 530 are omitted or components such as the positioning group execution unit 520 are integrated into other components such as the control unit 510 . It will be described as meaning that it can be configured and the like, and includes everything in order to help a sufficient understanding of the invention.

The communication interface unit 500 may communicate with the plurality of scanner devices 105 provided in the sealed work space 97 such as tunnel construction via the communication network 110 of FIG. 1 . Of course, in the embodiment of the present invention, due to the nature of the work of the work space 97, the work space monitoring device 120 is installed and managed separately at a designated place (eg, on-site management office) of the work space 97. In this case, it is possible to directly perform communication by installing a coaxial cable or an optical cable without using the communication network 110 of the key communication company.

The communication interface unit 500 receives a communication signal of the communication device 100 provided from the plurality of scanner devices 105 , for example, a beacon signal. The communication interface unit 500 may also receive identification information of the scanner device 105 when receiving the beacon signal and transmit it to the control unit 510 . This is because identification information of the scanner device 105 must be recognized to determine which group the scanner device 105 belongs to according to an embodiment of the present invention.

In addition, the communication interface unit 500 may perform an operation for changing the signal transmission period of the communication device 100 or the scanner device 105 . Of course, the scanner device 105 will transmit in real time, but in the case of the communication device 100, it may be possible to change the signal transmission period in consideration of the communication environment of the workspace 97, etc. as mentioned above. Since this can be done in various situations, it will not be particularly limited to any one form.

The control unit 510 is in charge of overall control operations of the communication interface unit 500 , the positioning group execution unit 520 , and the storage unit 530 of FIG. 5 constituting the workspace monitoring device 120 of FIG. 1 . The control unit 510 may control the communication interface unit 500 to communicate with the plurality of scanner devices 105 in the workspace 97 . In addition, the controller 510 may control the positioning group execution unit 520 to perform a positioning operation for each group according to an embodiment of the present invention. To this end, the control unit 510 stores group setting information in the storage unit 530 or retrieves related information from the DB 120a of FIG. 1 and stores it in the storage unit 530 , and then provides it to the positioning group execution unit 520 . can do.

As another embodiment of the present invention, the control unit 510 of FIG. 5 may include a CPU and a memory, and the CPU and the memory may be configured as a single chip. The control unit 510 may include a control circuit, an operation unit (ALU), a command interpretation unit, a registry, and the like, and the memory may include a RAM. The control circuit may interpret the control operation, the operation unit may interpret the operation processing of binary bit information, and the instruction interpreter may interpret whether the input binary bit information is related to the performance of any operation. Here, the analysis may be that after matching data on the left and right sides of the lookup table (LUT), the control circuit finds the data on the right based on the data on the left and performs the operation. The registry is involved in software data storage. According to the above configuration, the CPU copies the program of the positioning group execution unit 520 when the workspace monitoring device 120 is initially driven, loads the program into the memory, and then executes it to quickly increase the data processing speed.

The positioning group execution unit 520 may store a program for performing an operation according to an embodiment of the present invention and execute it under the control of the control unit 510 . Representatively, it is possible to perform a GUI creation function for generating a monitoring screen as shown in FIG. 2, and a specific operation according to positioning for each group. Of course, "positioning by group" means that a beacon signal or beacon data is received from the scanner device 105 in a state in which a plurality of groups are set for a plurality of scanner devices 105 provided in the closed working space 97. When the group is divided based on the group setting information, and after checking the reception state of the beacon signal in each group, an operation for calculating the location of the communication device 100 based on this and displaying it on the screen may be performed.

The time for positioning the operator or the vehicle may be preset and, of course, may be changed by the manager. If it is an urgent job site, positioning can be done in 30-second increments, otherwise, positioning can be made in 1-minute increments. Of course, these settings may be variously changed. For example, when positioning is performed in units of 30 seconds, if the communication device 100 transmits a beacon signal once per second, it transmits a total of 30 times during 30 seconds. Accordingly, the positioning group execution unit 520 may determine whether the beacon signal has been received 30 times in the scanner device 105 of a specific group. Accordingly, if there is a group that has received all of them, it is possible to trust the group and calculate the location of the specific communication device 100 based on the location of the scanner device 105 in the group. For example, even in the case of a specific group, a plurality of scanner devices 105 may be located, and since the location of each scanner device 105 can be known in advance, through this, the communication device 100 is located anywhere within the group. You can determine exactly what you are doing. For example, since the beacon signal has a communication radius of 50 m and the signal strength can also be measured, for example, even if the two scanner devices 105 equally receive the beacon signal 30 times, which It can be determined whether it is closer to the scanner device 105 .

As described above, in the embodiment of the present invention, after setting the plurality of scanner devices 105 as a group, positioning the position of the operator or vehicle is due to the poor communication environment in the work space 97 . Therefore, in order to determine its accuracy, it is determined through a group. Of course, it may be possible to perform positioning using individual scanner devices 105 rather than groups. However, it can be seen that the possibility of the error can be further reduced by using the plurality of scanner devices 105 in the same group together.

The positioning group execution unit 520 may determine the number of times the signal is received as the signal state of the beacon signal as described above, but may also be determined by calculating the total amount of data of the received beacon signal. In other words, whenever the beacon signal is transmitted once, in the case of Bluetooth 3.0, data of 24 Mbit/s, for example, identification information of the communication device 100 is transmitted. Of course, time information may also be included. Therefore, when limiting to 30 times for 30 seconds, data of (24×30) Mbit must be calculated in the specific scanner device 105 . However, in the case of the scanner device 105 in which the communication state is not good, of course, the communication radius may also have an effect, but even in the same group, the sum of data cannot be the same. In this logic, the signal state for receiving the beacon signal of the same communication device 100 in the group in which the communication device 100 is located and its surrounding group may not also be the same.

Accordingly, the positioning group execution unit 520 trusts the group satisfying the preset condition in the plurality of groups when positioning the position of the operator or vehicle for each group. In other words, the number of times of signal reception and the total amount of data may be used as preset conditions. If there is a group that satisfies the corresponding conditions, the position of the operator or the vehicle is calculated based on the group. For example, as a result of calculating the total amount of data in the first to third groups, if the amount of data in each group was 30, 20, and 10, and the preset condition was 30, in the embodiment of the present invention, the communication device 100 is assigned to the first group. is finally determined to be located, and the location of the communication device 100 is calculated based on the scanner device 105 of the group and displayed on the screen. According to the intention of the designer, it is possible to determine the designated location of the group as the final location.

As mentioned above, when the number of signal reception times or the total data amount is calculated in the same way in the two groups, the positioning group execution unit 520 may determine an error and perform relocation or rescan, and of course, one scanner device. When (105) is used, it can be determined that it is located in between. However, in the case of calculating using a plurality of scanner devices 105 by setting a group, it may be preferable to ignore it under the premise that the same calculation probability is low. Of course, since the processing method may be changed, the embodiment of the present invention will not specifically limit the ignoring operation.

In addition, since the positioning group execution unit 520 has already been sufficiently described in relation to processing when a beacon signal is detected or data is calculated in only one group in the outer group and other groups, detailed information is provided instead of the contents. want to

The storage unit 530 may store various information or data processed under the control of the control unit 510 . Representatively, in the embodiment of the present invention, setting information for each group may be stored. Since such setting information may be stored in the registry as software and used, the embodiment of the present invention will not be limited to any one form.

6 is a flowchart illustrating a workspace monitoring process according to an embodiment of the present invention.

Referring to FIG. 6 together with FIG. 1 for convenience of explanation, the workspace monitoring device 120 of FIG. 1 according to an embodiment of the present invention is provided in the sealed workspace 97 to the surrounding communication device 100. Stores group information divided into a plurality of scanner devices 105 communicating with each group (S600). Here, the group can be set in various ways, but it can be divided into an outer group and other groups, and each group has various shapes depending on the size of each block, such as setting each block of a cement structure used in tunnel construction into a group. can be provided with It is preferable to set two or more scanner devices 105 as a group, but it does not matter whether one scanner device 105 is used for a specific group. Typically, one scanner device 105 may be provided in the outer group. Accordingly, in the embodiment of the present invention, a plurality of groups are set, and each group may be grouped in various forms. For example, each group does not set a group with a uniform number of scanner devices 105 , but groups may be set with a different number from each other, so it will not be particularly limited to any one form.

For example, if it is determined that the communication environment is bad in a block having a specific group, grouping may be set by tying the neighboring block and the scanner device 105 in the corresponding block in order to increase the accuracy of measurement. As the construction progresses, the scanner device 105 may be additionally installed, and a new group may be added through additional installation. After the scanner device 105 is installed, the location information of the installed scanner device 105 is preferably registered. In addition, depending on the location information of the scanner device 105, it may be displayed and appear at the installation location of the scanner device 105 on the monitoring screen, and through this, the administrator can determine whether the scanner device 105 is additionally installed or there is a malfunction, etc. can be judged Of course, the screen display of the scanner device 105 only facilitates management, but is not particularly limited thereto.

In addition, the workspace monitoring device 120 is a scanner device of each group based on the stored group information when the communication device 100 is changed in location, for example, when the vehicle of the operator who owns the communication device 100 moves. 105), the signal state of the location-changed communication device 100 is determined for each group, and finally a location change is determined based on the group-by-group determination result (S610).

Here, the method of determining the signal state of the communication device 100 for each group has been sufficiently described above. Typically, the number of times a signal is received or the total amount of data received may be used. When it is finally determined that the communication device 100 is located in a specific group among a plurality of groups, a location calculation may be performed based on the scanner device 105 of the corresponding group. For example, the distance may be further measured using the signal strength, or the direction or the exact position may be calculated through the measured distances with the plurality of scanner devices 105 in the group. For example, when the distance from the location of the communication device 100 to the plurality of scanner devices 105 is known, the location information of the plurality of scanner devices 105 is known, so the exact location of the communication device 100 can be determined through this. You may be able to determine In other words, since the positions of the plurality of scanner devices 105 are known and the distance to the communication device 100 located at an arbitrary point can be known through the signal strength, the exact location of the communication device 100 can be known through this. will be able Algorithms to which various mathematical formulas are applied may be used.

A more specific method will be further described with reference to FIG. 7 .

7 is a flowchart illustrating a workspace monitoring process according to another embodiment of the present invention.

Referring to FIG. 7 together with FIG. 1 for convenience of explanation, the workspace monitoring device 120 of FIG. 1 according to another embodiment of the present invention is a scanner for exit including two or more scanner devices (or beacon scanners) 105 . A device (or an outer scanner) and a plurality of positioning scanner device groups (or beacon scanner groups) are set ( S700 ). Of course, according to an embodiment of the present invention, the outer group may be the first group, and other groups may be the second group. The first, second, etc. may be variously assigned. That is, the outer group may be referred to as it is, and other groups may be referred to as first to third groups.

In addition, the workspace monitoring device 120 receives the worker's beacon data from each individual scanner device 105 for each predetermined time unit (eg, every 5 seconds) (S701).

Then, the workspace monitoring device 120 sums up all the received beacon data, that is, the beacon signal for each group (S702). For example, the sum total of all data received by the plurality of scanner devices 105 of a specific group is calculated.

When there is data received for each group, the workspace monitoring apparatus 120 may determine whether data is detected (or measured, calculated) in one group or data is detected in a plurality of groups (S703, S704) ).

If only one group is detected, the workspace monitoring apparatus 120 may further determine whether it is an outer group (S705). For example, when the first to third groups are set, data of 30 is detected in the first group and no data is detected in the other groups. Of course, here, 30 is an arbitrary number. For example, in case of Bluetooth 3.0, data of 24 Mbit per second is transmitted, so when the position calculation is performed every 10 seconds, data of (10×24) Mbit should be calculated. Of course, the determination may be made in consideration of the error.

In the case of an outer group, the workspace monitoring device 120 ignores the result value when the communication device 100 is not located inside the tunnel and can keep the previous screen as it is (S712), but if it is located inside, it can be exited. It is determined that the positioning method can be changed (S708).

If it is not the outer group, the location of the communication device 100 may be calculated based on the corresponding group, more precisely, the location of the communication device 100 based on the scanner device 105 of the corresponding group and displayed on the screen (S707).

On the other hand, in step S704, when data is detected in a plurality of groups, it can be divided into two types (S709 to S711). This is a case in which the total amount of data is highest in one group among the first to third groups. Of course, in this case, you trust the group. Trust means selecting a corresponding group and calculating the location of the communication device 100 (S710). For example, as a result of calculating the total amount of data of the first to third groups, it is shown in the form of 30, 20, and 10. Of course, 30 is the total amount of data when data is normally received. Errors may be accounted for.

On the other hand, it is a case in which the total amount of data appears to be high in a plurality of groups among the third to third groups (S711). In fact, in a communication environment, since the probability that a plurality of groups are equally calculated is low, in this case, it may be better to treat it as an error. For example, among the first to third groups, the first group and the second group are equally measured as 30, and the third group is measured as 10. In this case, the measurement is ignored and the previous screen is maintained (S712).

Of course, the calculation of the total amount of data in each group is exemplified with reference to FIG. 7 , but in order to calculate the total amount of data, it may be cumbersome to check the data in the data packet. any may be possible It is to count the number of times by simply checking the time information. If a beacon signal is transmitted in 1 second, if positioning is performed in units of 10 seconds, if 10 times are received, the group is trusted with priority. The rest of the contents are not much different from the above method of calculating the total amount of data, so we will replace them with those contents. In addition, since it may be understood that the received data length is calculated instead of the total amount of data, the signal state in the embodiment of the present invention may be variously interpreted as long as it does not depart from the spirit of the present invention.

On the other hand, even though it has been described that all components constituting the embodiment of the present invention are combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, although all of the components may be implemented as one independent hardware, some or all of the components are selectively combined to perform some or all functions of the combined components in one or a plurality of hardware program modules It may be implemented as a computer program having Codes and code segments constituting the computer program can be easily deduced by those skilled in the art of the present invention. Such a computer program is stored in a computer-readable non-transitory computer readable media, read and executed by the computer, thereby implementing an embodiment of the present invention.

Here, the non-transitory readable recording medium refers to a medium that stores data semi-permanently and can be read by a device, not a medium that stores data for a short moment, such as a register, cache, memory, etc. . Specifically, the above-described programs may be provided by being stored in a non-transitory readable recording medium such as a CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM, and the like.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those having the knowledge of, of course, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

100: communication device (or beacon device) 105: scanner device (or beacon scanner)
110: communication network 120: work space monitoring device
500: communication interface unit 510: control unit
520: positioning group execution unit 530: storage unit

Claims (12)

a storage unit provided inside the work space to store group information obtained by dividing a plurality of scanner devices communicating with peripheral communication devices into groups; and
When the location of the communication device is changed, the signal state of the communication device with the changed location received from the scanner device of each group is determined for each group based on the stored group information, and finally the location based on the group determination result a control unit that determines the change;
Workspace monitoring device including. According to claim 1,
The control unit, a workspace monitoring device for determining the number of times of signal reception or the total amount of data received by the communication device received from the scanner devices constituting each group in order to determine the signal state for each group. 3. The method of claim 2,
When the signal state of the communication device is detected in a plurality of groups, the control unit is a workspace monitoring device for calculating the final change position of the beacon device based on the group having the largest number of times of signal reception or the total amount of data received . 3. The method of claim 2,
The control unit, a workspace monitoring device for ignoring the change in the location of the communication device when the number of times of signal reception or the total amount of data is detected to be the same in a plurality of groups. According to claim 1,
When the signal state of the communication device whose position has been changed in one group is detected, the control unit further determines whether it is an outer group adjacent to the entrance/exit of the workspace to determine the final change position of the communication device. 6. The method of claim 5,
The control unit, a workspace monitoring device for changing the position measurement method of the communication device when the location of the communication device is detected as the outer group. Storing, by a storage unit, group information provided in the working space and divided into groups of a plurality of scanner devices that communicate with peripheral communication devices; and
When the location of the communication device is changed, the control unit determines for each group the signal state of the communication device with the changed location received from the scanner device of each group based on the stored group information, and based on the group determination result finally deciding to change the location;
A method of driving a workspace monitoring device, including. 8. The method of claim 7,
The determining step is
and determining the number of times of signal reception of the communication device or the total amount of data received by the scanner devices constituting each group in order to determine the signal state for each group. 9. The method of claim 8,
The determining step is
When the signal state of the communication device is detected in a plurality of groups, calculating the final change position of the communication device based on the group having the largest number of times of signal reception or the total amount of data received; Workspace monitoring further comprising: How to operate the device. 9. The method of claim 8,
ignoring the change in the location of the communication device when the number of times of signal reception or the total amount of data in a plurality of groups is sensed to be the same; 8. The method of claim 7,
When the signal state of the communication device whose location has been changed in one group is detected, further determining whether the group is an outer group adjacent to the entrance/exit of the workspace to determine the final change location of the communication device; How to operate the device. 12. The method of claim 11,
and changing a position measurement method of the communication device when the location of the communication device is detected as the outer group.

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