Position sharing system

Abstract

To provide a position sharing system enabling position information to be shared and to be communicated between workers stably in a wider range, and enabling a site office or the like to specify an accident occurrence location or the like more quickly when an accident occurs.SOLUTION: A position sharing system includes: a portable terminal device 2 carried by each of a plurality of workers; a wireless communication device 3 carried together with the portable terminal device 2; positioning means 4 measuring position information of the workers; and a management terminal device 5 connected to a network N. The position information including position data measured by the positioning means 4 is acquired by a mobile terminal device 1, and stored in a storage portion 2003, and is transmitted from a short-range communication portion 2004 to the other mobile terminal device 2 via the wireless communication device 3 in a state of being associated with a worker ID. The other mobile terminal device 2 stores the received position information in the storage portion 2003 in a state of being associated with the worker ID. When it is determined that the position information is within the range, the position information of each worker stored in the storage portion 2003 is transmitted, and the management terminal device 5 acquires the position information of each worker.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a location sharing system, and particularly to a location sharing system in an environment with poor radio wave conditions such as in a forest.

Background Art

[0002] Currently, 70% of Japan's land area is forest, ranking third in the world in terms of forest coverage rate. In addition, the forest stock volume has reached its maximum since the end of the war, and the logging period has arrived. On the other hand, the number of forestry workers has been decreasing year by year, and the labor shortage in forestry has become serious. In other industries, mechanization and informatization have compensated for the labor shortage, but in the mountains, since the radio waves of base stations cannot be received in mobile communication services, that is, in a so-called out-of-service area, it has been difficult to progress in informatization in forestry.

[0003] Moreover, the incidence rate of labor accidents in forestry, which handles heavy objects such as felled trees in the mountains with poor scaffolding, is the highest among all industries when compared with other industries in terms of the "per thousand rate" representing the degree of disaster occurrence. Under these circumstances, since August 1, 2019, the regulations on safety measures for logging operations have been revised. When multiple workers perform logging and other operations on-site in the mountains, in order to prevent accidents where loggers or workers and heavy machinery accidentally come into close contact and collide, entry by non-loggers is prohibited within a circle with a radius equivalent to twice the felled tree. For example, in the case of a 20m standing tree, the area within a radius of 40m around the standing tree is a restricted area where non-loggers are prohibited from entering.

[0004] Compliance with the law is required at the site, but in reality, the working environment and the awareness of workers have an impact, and the fact is that it is not always observed. An effective means of preventing accidents at forestry sites is desired.

[0005] Therefore, there are provided two or more worker terminals each having a GNSS module and an LPWA module that adopts a spread spectrum method using a sub-GHz frequency. In addition to proximity detection in which each worker terminal determines the distance between worker terminals based on the signal strength of radio waves, each worker terminal is also provided with proximity determination means that calculates the azimuth angle from the latitude and longitude information of both itself and the other party by GNSS and adds the proximity direction as a determination factor, and notification means that issues a proximity alarm based on the result of the proximity determination means. A forestry worker crisis avoidance system is disclosed (see, for example, Patent Document 1).

[0006] Also, as a communication means, a transceiver used as a business radio is utilized, and a transmission / reception circuit for transmitting and receiving DTMF signals as emergency signals from the transceiver is arranged in the unit body with a microphone that the worker carries at the same time. A safety system is also disclosed that strikes the helmet of other workers nearby with a striking hammer to surely notify the emergency state of the affected worker even in a noisy environment and at the same time forms an audio transmission path for capturing the surrounding situation (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0008] However, in the forestry worker crisis avoidance system of Patent Document 1, although LPWA is used as the communication method, generally, communication using LPWA has a problem that it is difficult to operate in practice due to the weak and unstable transmission output and the influence of forest shielding. In addition, disasters in the mountains include not only contact and collision accidents during logging operations but also accidents such as falling from steep slopes and being attacked by harmful animals such as bees and bears.

[0009] When an accident or disaster occurs and it is necessary to request rescue or transportation to a hospital, conventionally, a worker who has sensed the disaster descends to within the radio wave range of mobile communication, contacts the on-site office or the company, and notifies the location of the accident. Then, a request for an ambulance or the like is made from the on-site office or the like. However, in the mountains, the location is grasped in units of forest compartments and sub-compartments (hereinafter referred to as forest sub-compartments). Therefore, the notification of the accident location from the worker to the on-site office or the like is based on the forest sub-compartment. The on-site office or the like converts the location to the address corresponding to the forest sub-compartment where the accident occurred and reports the location to the fire department or the like. For this reason, due to the time taken from the occurrence of the accident to the report, there are cases where the victims die. The technologies of Patent Documents 1 and 2 could not solve such problems.

[0010] Therefore, an object of the present invention is to provide a location sharing system that can stably share location information and communicate among workers in a wider range, and can identify the accident location at the on-site office or the like more quickly when an accident occurs.

Means for Solving the Problem

[0011] To solve the above problems, a location sharing system according to the present invention includes a portable terminal device carried by each of a plurality of workers who form a group, a wireless communication device carried together with the portable terminal device, a positioning means carried together with the portable terminal device for measuring the position data of the carrying worker, and a management terminal device connected to a network. The portable terminal device includes a control unit for controlling each part of the portable terminal device, a short-range communication unit for performing short-range wireless communication with the wireless communication device, a communication unit for communicating with a base station, a storage unit for storing position information including the position data, and a within-range determination unit for determining whether it is within the range where communication with the base station is possible. Among the workers, the portable terminal device carried by one worker is referred to as one portable terminal device, the wireless communication device and the positioning means carried together with the one portable terminal device are respectively referred to as one wireless communication device and one positioning means, the portable terminal device carried by another worker is referred to as another portable terminal device, and the wireless communication device and the positioning means carried together with the another portable terminal device are respectively referred to as another wireless communication device and another positioning means. Then, the position data measured by the one positioning means is acquired by the one portable terminal device, the control unit of the one portable terminal device stores the position information including the acquired position data in the storage unit, the control unit of the one portable terminal device transmits the position information from the short-range communication unit to the one wireless communication device in a state linked to the ID identifying the one worker, the one wireless communication device transmits the received position information to the other wireless communication device, the other wireless communication device transmits the received position information to the short-range communication unit of the other portable terminal device, the control unit of the other portable terminal device stores the received position information in the storage unit in a state linked to the ID identifying the one worker, and when it is determined by the within-range determination unit that it is within the range, the control unit reads out the respective position information of each worker from the storage unit and causes it to be transmitted by the communication unit, and the management terminal device acquires the respective position information of each worker transmitted from the communication unit of the portable terminal device.

[0012] Further, in the above-described position sharing system, it is preferable that the portable terminal device has a display unit for displaying an image, map information is stored in the storage unit, and the control unit causes the display unit to display a map based on the map information.

[0013] Further, in the above-described position sharing system, it is preferable that the portable terminal device has a display unit for displaying an image, map information is stored in the storage unit, the control unit causes the display unit to display a map based on the map information, and also causes the position information of each worker to be displayed on the map.

[0014] Further, the above-described position sharing system includes an input unit provided in the portable terminal device for inputting a distance for setting a danger range centered on the position of the own device, and a danger notification unit for notifying of danger. When the danger range is set, the control unit generates the position information in which the danger flag information indicating that the danger range is set and the distance information set in the danger range are set as the danger range information in the position data. When the danger range is set in the one portable terminal device, the one control unit determines whether the position information of the other worker obtained is within the danger range based on the danger range information included in the position information of the one worker, and when it is determined that it is within the range, it is preferable to cause the danger notification unit to notify of danger.

[0015] The above-described position sharing system is provided in the portable terminal device, and includes an input unit for inputting a distance for setting a danger range centered on the own device, and a danger notification unit for notifying danger. When the danger range is set, the control unit generates position information in which danger flag information indicating that the danger range is set and distance information set in the danger range are set as danger range information in the position data. When the danger range is set in the one portable terminal device, the control unit of the other portable terminal device determines whether the position information acquired by the positioning means carried together with the other portable terminal device falls within the danger range based on the danger range information included in the position information of the one worker acquired. When it is determined that the position information falls within the danger range, it is preferable to cause the danger notification unit to notify danger.

[0016] The above-described position sharing system is preferably provided in the portable terminal device and includes an input unit for setting position information of an arbitrary location and information on the environment of the location, which is information necessary for forestry, as point information.

[0017] The above-described position sharing system is provided in the portable terminal device, and includes an input unit for setting position information of an arbitrary location and information indicating that the location is a danger point as danger point information, and a danger notification unit for notifying danger. When it is determined that the acquired position information falls within a predetermined range from the position of the danger point, it is preferable to cause the danger notification unit to notify danger.

[0018] The above-described location sharing system is provided in the portable terminal device, and includes an input unit for setting location information of an arbitrary location and information indicating that the location is a dangerous point as dangerous point information, and a danger notification unit for notifying danger. The control unit of the one portable terminal device transmits the set dangerous point information from the short-range communication unit to the one wireless communication device. The one wireless communication device transmits the received dangerous point information to the other wireless communication device. The other wireless communication device transmits the received dangerous point information to the short-range communication unit of the other portable terminal device. The control unit of the other portable terminal device stores the received dangerous point information in the storage unit. When the control unit of the other portable terminal device determines that the location information measured and acquired by the positioning means carried together with the other portable terminal device falls within a predetermined range from the location of the dangerous point, it is preferable to cause the danger notification unit to notify danger.

[0019] The above-described location sharing system has an input unit for the portable terminal device to input a text message and a display unit for displaying the text message. The control unit of the one portable terminal device transmits the text data of the text message input from the input unit from the short-range communication unit to the one wireless communication device. The one wireless communication device preferably transmits the received text data to the other wireless communication device. The other wireless communication device transmits the received text data to the short-range communication unit of the other portable terminal device.

Advantages of the Invention

[0020] According to the location sharing system according to the present invention, it is possible to stably share location information and communicate among workers in a wider range, and when an accident occurs, it is possible to identify the accident location at the on-site office or the like more quickly, thereby providing a location sharing system.

Brief Description of the Drawings

[0021]

Figure 1

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Embodiments for Carrying Out the Invention

[0022] An embodiment of the location sharing system 1 according to the present invention will be described. FIG. 1 shows an example of the location sharing system 1 according to this embodiment.

[0023] As shown in FIG. 1, the location sharing system 1 according to this embodiment includes mobile terminal devices 2 each carried by a plurality of workers, a wireless communication device 3 carried together with the mobile terminal device 2, a positioning device 4 carried together with the mobile terminal device 2 and measuring the location information of the carrying worker, a management terminal device 5 connected to the network N, and a management server 6 connected to the network N.

[0024] In this embodiment, an example is shown in which a first group G1 that works together at one site in the mountain M and a second group G2 that works together at another site in the same mountain M each constitute the location sharing system 1 according to this embodiment. The first group G1 is composed of workers 1 to 3, and the second group G2 is composed of workers 4 to 6. In this embodiment, FIG. 1 shows an example in which a single common management terminal device 5 is used as the management terminal device of the location sharing system 1 constituted by the group G1 and the group G2. However, for example, when the group G1 and the group G2 are groups organized by different companies, the management terminal devices are configured separately.

[0025] The mobile terminal devices 2 that make up the location sharing system 1 according to this embodiment are, in the first group G1, the mobile terminal device 2(102) carried by worker 1, the mobile terminal device 2(202) carried by worker 2, and the mobile terminal device 2(302) carried by worker 3. In the second group G2, they are the mobile terminal device 2(402) carried by worker 4, the mobile terminal device 2(502) carried by worker 5, and the mobile terminal device (602) carried by worker 6. Also, the wireless communication device and the positioning device carried by worker 1 together with the mobile terminal device 2(102) are the wireless communication device 3(103) and the positioning device 4(104). The wireless communication device and the positioning device carried by worker 2 together with the mobile terminal device 2(202) are the wireless communication device 3(203) and the positioning device 4(204). The wireless communication device and the positioning device carried by worker 3 together with the mobile terminal device 2(202) are the wireless communication device 3(303) and the positioning device 4(304). The wireless communication device and the positioning device carried by worker 4 together with the mobile terminal device 2(402) are the wireless communication device 3(403) and the positioning device 4(404). The wireless communication device and the positioning device carried by worker 5 together with the mobile terminal device 2(502) are the wireless communication device 3(503) and the positioning device 4(504). The wireless communication device and the positioning device carried by worker 6 together with the mobile terminal device 2(602) are the wireless communication device 3(603) and the positioning device 4(604).

[0026] Also, when the mobile terminal device 2(102) carried by worker 1 functions as the "one mobile terminal device" in the claims, the mobile terminal devices 2(202) and 2(203) carried by workers 2 and 3 in the same first group G1 function as the "other mobile terminal devices 2" in the claims respectively. However, the mobile terminal devices 2(202) and 2(203) carried by workers 2 and 3 also function as the "one mobile terminal device" respectively according to the circumstances at that time. The same applies to the second group G2.

[0027] The mobile terminal device 2 is, for example, a smartphone, a tablet computer, or the like. The wireless communication device 3 is, for example, a digital simplex wireless device. The positioning device 4 is, for example, a GNSS (Global Navigation Satellite System) receiver. Note that the positioning device 4 corresponds to the positioning means in the claims. The management terminal device 5 is a personal computer, a smartphone, a tablet computer, or the like. The management server 6 is a computer that stores data necessary for the position sharing system 1 according to the present embodiment and provides data in response to a user's request.

[0028] As shown in FIG. 2, the mobile terminal device 2 includes a control unit 2001 that controls each part of the mobile terminal device 2, a short-range communication unit 2004 that communicates with the wireless communication device 3 using short-range wireless communication, a communication unit 2008 that communicates with the base station K, a storage unit 2003 that stores various information and control programs, etc., an in-range determination unit 2009 that determines whether it is within a range where communication with the base station K is possible, a display unit 2005 that displays images and text, an input unit 2010 that inputs various instructions of the user, a danger notification unit 2011 that notifies of danger, an audio input unit 2006 that inputs audio, an audio output unit 2007 that outputs audio, an imaging unit 2012 that captures the surroundings and generates surrounding image information, and a fall detection unit 2013 that detects that an operator has fallen.

[0029] As shown in FIG. 3, the wireless communication device 3 includes a control unit 3001 that controls each part of the wireless communication device 3, a short-range communication unit 3004 that communicates with the mobile terminal device 2 using short-range wireless communication, a wireless communication unit 3008 that has a long-range wireless communication function, a storage unit 3003 that stores control programs, etc., a display unit 3005 that displays images and text, an operation unit 3009 that accepts various operations of the user, an audio input unit 3006 that inputs audio, and an audio output unit 3007 that outputs audio. Similar to a normal digital simplex wireless device, the wireless communication device 3 can make a voice call by operating the operation unit 3009 and using the audio input unit 3006 and the audio output unit 3007.

[0030] As shown in FIG. 4, the positioning device 4 includes a control unit 4001 that controls each part of the positioning device 4, a short-range communication unit 4004 that communicates with the mobile terminal device 2 using short-range wireless communication, a receiving unit 4005 that receives signals transmitted from artificial satellites, a positioning calculation unit 4006 that calculates a position based on the received signals, and a storage unit 4003 that stores control programs and the like.

[0031] The control units 2001, 3001, and 4001 of the mobile terminal device 2, the wireless communication device 3, and the positioning device 4 are composed of a processor, a RAM (Random Access Memory), a ROM (Read Only Memory), and the like. The processor is a CPU (Central Processing Unit), an MPU (Micro Processing Unit), an ASIC (Application Specific Integrated Circuit), or the like. The control units 2001, 3001, and 4001 function as control units 2002, 3002, and 4002 when the control programs stored in the above ROM or storage units 2003, 3003, and 4003 are executed by the above processors. The control units 2002, 3002, and 4002 are respectively connected to each part of the mobile terminal device 2, the wireless communication device 3, and the positioning device 4, and control the overall operations of the mobile terminal device 2, the wireless communication device 3, and the positioning device 4 respectively by transmitting and receiving signals or data to and from each component.

[0032] The short-range communication units 2004, 3004, and 4005 of the mobile terminal device 2, the wireless communication device 3, and the positioning device 4 are communication devices that perform wireless communication based on the short-range communication method, and a communication module compliant with the Bluetooth (registered trademark) short-range wireless communication standard can be preferably used.

[0033] The communication unit 2008 is a hardware module for connecting the mobile terminal device 2 to the network N via the base station K and communicating with other devices. The communication unit 2008 is a modulation / demodulation device such as various modems.

[0034] The storage units 2003, 3003, and 4003 of the mobile terminal device 2, the wireless communication device 3, and the positioning device 4 are each configured to include a non-volatile storage device such as a NAND-type flash memory or a hard disk drive, and a random-accessible storage device such as a volatile SRAM or DRAM. Application programs and various information are stored in the storage units 2003, 3003, and 4003. In the storage unit 2003 of the mobile terminal device 2, the group ID of each group, the worker ID of the workers belonging to each group, and the IDs of the devices of the mobile terminal, the wireless communication device 3, and the positioning device 4 carried by each worker belonging to the group are stored in a linked state.

[0035] The display units 2005 and 3005 of the mobile terminal device 2 and the wireless communication device 3 can be configured by a liquid crystal display (LCD) or an organic EL (OLED).

[0036] The input unit 2010 can be configured by a touch panel such as a resistive film type or a capacitance type.

[0037] The voice input units 2006 and 3006 of the mobile terminal device 2 and the wireless communication device 3 can be configured by microphones, and the voice output units 2007 and 3007 of the mobile terminal device 2 and the wireless communication device 3 can be configured by speakers.

[0038] The imaging unit 2012 includes imaging elements such as a lens and a CCD (Charge Coupled Device) image sensor, and is configured by a device capable of imaging surrounding images.

[0039] The wireless communication unit 3008 includes an antenna, a demodulation circuit, a modulation circuit, etc. for processing wireless signals. The antenna receives the received signal and radiates the transmitted signal into space. The demodulation circuit demodulates the received signal received by the antenna. The modulation circuit modulates the transmitted signal and outputs it to the antenna. For example, the wireless communication unit 3008 performs communication processing according to the communication standard of digital simple wireless.

[0040] The operation unit 3009 is composed of input devices such as buttons, keys, switches, levers, and touch panels.

[0041] The receiving unit 4005 and the positioning calculation unit 4006 can be composed of a GNSS module that integrates a baseband IC (Integrated Circuit), an RF (Radio Frequency) IC, an LNA (Low Noise Amplifier), a SAW (Surface Acoustic Wave) filter, and the like.

[0042] In the position sharing system 1 according to the present embodiment, the control unit 2002 of the mobile terminal device 2 transmits a signal for instructing the short-range communication unit 2004 to acquire current position data for the positioning device 4 carried together at a predetermined interval. When a signal for instructing the acquisition of position data is received by the short-range communication unit 4004 of the positioning device 4, the control unit 4002 of the positioning device 4 causes the positioning calculation unit 4006 to calculate position data including latitude and longitude based on the signal periodically acquired by the receiving unit 4005 from GNSS satellites (not shown). The control unit 4002 of the positioning device 4 causes the short-range communication unit 4004 to transmit the calculated position data and the time information at that time to the mobile terminal device 2. When the position data and the time information are received by the short-range communication unit 4004 of the mobile terminal device 2, the control unit 2002 of the mobile terminal device 2 generates position information including the position data, and stores the generated position information and the above time information in the storage unit 2003.

[0043] The interval for acquiring position data can be arbitrarily set. Referring to FIG. 6, when the setting button 8 described later displayed on the display unit 2005 is tapped, the control unit 2002 causes the display unit 2005 to display a setting form 7 for inputting various settings as shown in FIG. 7. In the setting form 7, a position information acquisition interval input field 71 for inputting the position information acquisition interval is provided. The control unit 2002 stores the time input by the user in the position information acquisition interval input field 71 in the storage unit 2003 as the position information acquisition interval, and transmits a signal instructing the above-described positioning device 4 to acquire current position data at the position information acquisition interval. Note that it is preferable that the position information acquisition interval input field 71 displays times that can be preselected in a pull-down manner, and the user is configured to select an appropriate time as the position information acquisition interval from the displayed times.

[0044] In addition, the control unit 2002 of the mobile terminal device 2 causes the short-range communication unit 2004 to transmit, to the wireless communication device 3 carried together, the position information, the time information, and an ID for specifying the worker carrying the mobile terminal device 2, in association with each other. When the position information, the time information, and the above ID are received by the short-range communication unit 3004 of the wireless communication device 3, the control unit 3002 of the wireless communication device 3 causes these to be transmitted to the wireless communication device 3 carried together with other mobile terminal devices 2 in the group.

[0045] For example, when a mobile terminal device 2(102) carried by worker 1 receives position data and time information from a wireless communication device 3(103) carried together, and position information is generated, the position information, the time information, and the ID identifying worker 1 are transmitted from the mobile terminal device 2(102) via the wireless communication device 3(103) to the wireless communication devices 3(203) and 3(303) carried by workers 2 and 3. In this case, the mobile terminal device 2(102) and the wireless communication device 3(103) carried by worker 1 function as "one mobile terminal device" and "one wireless communication device" in the claims, and the mobile terminal devices 2(202) and 2(302) and the wireless communication devices 3(203) and 3(303) carried by workers 2 and 3 each function as "other mobile terminal devices" and "other wireless communication devices" in the claims.

[0046] When the proximity communication units 3004 of the wireless communication devices 3(203) and 3(303) carried by workers 2 and 3 receive the position information, the time information, and the ID of worker 1, the control units 3002 of the wireless communication devices 3(203) and 3(303) cause the position information, the time information, and the ID of worker 1 to be transmitted to the respective mobile terminal devices 2(202) and 2(302) carried together. When the proximity communication units 2004 of the mobile terminal devices 2(202) and 2(302) receive the position information, the time information, and the ID of worker 1, the control units 2002 of the mobile terminal devices 2(202) and 2(302) cause the position information, the time information, and the ID of worker 1 to be stored in the storage unit 2003.

[0047] On the other hand, the mobile terminal device 2(102) carried by worker 1 also functions as "other mobile terminal device". In that case, in the same manner as above, the mobile terminal devices 2(202) and 2(302) carried by workers 2 and 3 each function as "one mobile terminal device", and the transmitted position information, time information, and the ID of worker 2, and the position information, time information, and the ID of worker 3 are stored in the storage unit 2003 respectively.

[0048] In this embodiment, a positioning device 4 separate from the portable terminal device 2 and the wireless communication device 3 is used as the positioning means. However, the positioning means may be incorporated in the portable terminal device 2 or the wireless communication device 3. When the positioning means is incorporated in the wireless communication device 3, exchanges regarding the acquisition of position data are performed between the wireless communication device 3 and the portable terminal device 2 via the short-range communication unit 3004 of the wireless communication device 3.

[0049] In addition, the communication unit 2008 of the portable terminal device 2 constantly detects radio waves capable of communicating with the base station K. If there is a connectable base station K, it emits radio waves to connect with the base station K and enters the coverage area. That is, in this embodiment, the communication unit 2008 also functions as an in-coverage determination unit 2009 that determines whether it is within the coverage area where communication with the base station K is possible.

[0050] When it is determined by the in-coverage determination unit 2009 that it is within the coverage area, the control unit 2002 reads out the latest position information, time information, and ID of each worker from the storage unit 2003, and reads out the latest position information, time information, and ID of each worker stored in the management server 6 and compares the time information. If the latest position information of each worker stored in the own device is newer, the control unit 2002 causes the communication unit 2008 to transmit the latest position information to the management server 6. When the management server 6 receives the position information, time information, and ID of each worker from the portable terminal device 2, it stores these and transmits them to the management terminal device 5 via the network N. In this embodiment, the position information of the worker is transmitted to the management terminal device 5 via the management server 6, but it may be directly transmitted to the management terminal device 5.

[0051] For example, as shown in FIG. 5, in the portable terminal devices 2 carried by workers 1 to 3, each time their own location information is acquired, the location information and the time information at that time are stored. In the portable terminals 2 carried by other workers belonging to the first group G1, the location information of each worker acquired respectively is also received via the wireless communication device 3 and stored. Here, for example, when the portable terminal device 2 of worker 1 enters the radio wave range, the control unit 2002 reads out the latest location information, time information, and ID of each worker from the storage unit 2003, and reads out the latest location information, time information, and ID of each worker stored in the management server 6 and compares the time information. In the example shown in FIG. 6, when comparing the time information of 10:20:30, which is the time information of the latest location information of worker 1 stored in the management server 6, with the time information of 10:20:50, which is the time information of the latest location information of worker 1 stored in the portable terminal device 2 of worker 1, since 10:20:50 is newer, the location information at 10:20:50 is transmitted to the management server 6 and then transmitted from the management server 6 to the management terminal device 5. Also, when comparing the time information of 10:20:35, which is the time information of the latest location information of worker 2 stored in the management server 6, with the time information of 10:20:45, which is the time information of the latest location information of worker 2 stored in the portable terminal device 2 of worker 1, since the location information at 10:20:45 is newer, the location information at 10:20:45 is transmitted to the management server 6 and then transmitted from the management server 6 to the management terminal device 5. For worker 3, since the time information of the latest location information of worker 3 stored in the management server 6 and the time information of the latest location information of worker 3 stored in the portable terminal device 2 of worker 1 are both 10:20:38, there is no newer one, so there is no location information to be transmitted to the management server 6. In this way, each time the portable terminal device of any worker belonging to group 1 enters the range, the latest location information of each worker stored in the management server 6 and the management terminal device 5 is updated.

[0052] The storage unit 2003 of the mobile terminal device 2 stores map information downloaded from the management server 6 before use in the mountains. When using the position sharing system 1 according to the present embodiment in the mountains, as shown in FIG. 6, the control unit 2002 causes the display unit 2005 to display a map by default, and causes the position information of each worker in the group to be displayed on the map of the display unit 2005 of each worker's mobile terminal device 2. Further, as shown in FIG. 6, it is also preferable that the setting button 8 and the buttons 9 to 14 for operating various functions of the position sharing system 1 described later are displayed by default at positions that do not obstruct the map on the display unit 2005.

[0053] In addition to the maps of the Geospatial Information Authority of Japan, ortho-images, forest stand maps, and micro-topographic maps can also be displayed. Furthermore, a plurality of maps can be overlaid and displayed in layers. For example, by overlaying and displaying a forest stand map and a micro-topography, operations such as constructing a work path while being conscious of the flow of water can be performed.

[0054] In each mobile terminal device 2 in advance, the name and icon of the worker carrying the mobile terminal can be set so that the position of each worker is displayed so that it can be understood which worker is at which position. More specifically, as shown in FIG. 7, the setting form 7 is provided with a name input field 72 for inputting the name of the worker, an icon selection button 73 for selecting an icon, and a color selection button 74 for selecting the color of the icon. The control unit 2002 associates the name, icon, and color selected by the user in the name input field 72 with the ID of the worker and stores them in the storage unit 2003, and causes them to be displayed together with the icon 15 (see FIG. 6) when displaying the latest position information.

[0055] If the operator selects and sets icons for heavy machinery such as forwarders, harvesters, grapples, etc. used by the operator, or icons for machines such as chainsaws and brush cutters, when the position information is displayed, the icons 15 of the heavy machinery and machines will be displayed, making it clear where and which heavy machinery and machines are being used, which is preferable from the perspective of accident prevention. The icons 15 of operators who do not use heavy machinery or machines can be identified by using different colors respectively.

[0056] The icon 15 also functions as an input unit 2010. When the icon 15 is tapped, the control unit 2002 causes the display unit 2005 to display the name of the operator using the icon 15 and the position information indicating how many minutes ago the position information was acquired.

[0057] Furthermore, each control unit 2002 of the portable terminal device 2 causes the display unit 2005 to display an action trajectory that connects the latest position and the position before the update with a line on the map every time the acquired position information is updated after the application related to the position sharing system 1 is launched.

[0058] Also, referring to FIG. 6, a danger range setting button 9 for setting a danger range centered on the position of the own device is displayed on the display unit 2005 of the portable terminal device 2. When the danger range setting button 9 is tapped, the control unit 2002 causes the display unit 2005 to display a danger area distance input field 16 for inputting the distance for setting the danger range centered on the position of the own device as shown in FIG. 8, and the control unit 2002 causes the storage unit 2003 to store the distance input by the user in the danger area distance input field 16. Here, the "position of the own device" refers to the latest position measured and acquired by the positioning device 4 carried together. Note that the above-mentioned danger range setting button 9 and danger area distance input field 16 function as an "input unit for inputting the distance for setting the danger range" in the claims.

[0059] In particular, by setting a danger zone on the mobile terminal device 2 carried by a worker who uses heavy machinery or other machinery, it is possible to prevent accidents in which other workers are injured by coming into contact with heavy machinery or other machinery. Also, by setting a distance twice the tree height as the danger zone on the mobile terminal device 2 carried by a worker who uses a chainsaw, it is possible to comply with laws and regulations and prevent accidents in which other workers are injured by being caught in a fallen tree, for example.

[0060] Here, the location information includes location data based on the latitude and longitude measured by the positioning device 4, danger flag information indicating that a danger zone centered on the location of the mobile terminal is set by setting a flag, and distance information set in the danger zone. When a distance is input in the danger area distance input field 16 and a danger zone is set, the control unit 2002, upon acquiring the latest location data measured by the positioning device 4, generates location information in which the danger flag information and the distance information set in the danger zone are set as danger zone information in the location data, stores the generated location information in the storage unit 2003, and transmits the generated location information to another mobile terminal device 2 via the wireless communication device 3. That is, while a danger zone is set, location information in which danger zone information is set in the location data is generated every time the latest location data is acquired. If no danger zone is set, the location information is generated with the danger flag information and distance information blank.

[0061] When the control unit 2002 of the mobile terminal device 2 causes the display unit 2005 to display location information including danger area information, it displays it together with the set danger area D, as shown in Fig. 6. Fig. 6 shows an example in which a danger area is set on the mobile terminal device 2 of a worker who operates a forwarder that transports logs, and the location information of the worker is displayed as the forwarder icon 15 (15F) and the danger area D is also displayed.

[0062] The control unit 2002 of the mobile terminal device 2 that has set the danger range determines whether the latest position information of another worker obtained is within the danger range based on the danger range information included in its own latest position information. If it is determined that the information is within the danger range, a message or beep sound notifying of the danger is emitted from the voice output unit 2007. In this case, the voice output unit 2007 functions as the danger notification unit 2011 in the claims.

[0063] Also, the control unit 2002 of the mobile terminal device 2 carried by another worker within a group other than the mobile terminal device 2 that has set the danger range determines whether the latest position information of the other worker is within the danger range based on the danger range information included in the latest position information sent from the mobile terminal device 2 in which the danger range is set. If it is determined that the information is within the danger range, a message or beep sound notifying of the danger is emitted from the voice output unit 2007.

[0064] Taking the example where the danger range is set in the mobile terminal device 2 carried by the above-mentioned worker 1, on the display unit 2005 of the mobile terminal devices 2 carried by workers 1 to 3, the set danger range D is displayed around the icon 15 (15F) indicating the position of worker 1. For example, when worker 2 enters the danger range D, a message or beep sound notifying of the danger is reported from the voice output unit 2007 of the mobile terminal device 2 (102) of worker 1 and the voice output unit 2007 of the mobile terminal device 2 (202) of worker 2.

[0065] In addition, for the danger notification, together with the notification from the voice output unit 2007 or instead of the notification from the voice output unit 3007, as shown in FIG. 9, an image, character, or message indicating danger may be displayed on the display unit 2005 of the mobile terminal device 2. The character or message indicating danger is, for example, the character "Danger" or a message such as "You have entered the danger range. Please confirm immediately and ensure safety." In this case, the display unit 2005 functions as the danger notification unit 2011. Also, when the mobile terminal device 2 has a vibration function such as a smartphone, vibration may be generated by the built-in vibrator. In this case, the vibrator functions as the danger notification unit 2011.

[0066] Also, in this embodiment, a message or beep sound indicating danger is output from the voice output unit 2007 of the mobile terminal device 2. However, a danger signal notifying the danger may be transmitted to the wireless communication device 3 carried together via the short-range communication units 2004 and 3004, and the signal may be output from the voice output unit 2007 of the wireless communication device 3.

[0067] Note that the danger range may be set at the on-site office within the radio wave range before going to the work site in the mountains and shared with each other through the network N.

[0068] Also, referring to FIG. 6, on the display unit 2005 of the mobile terminal device 2, a point registration button 10 for registering the position information of an arbitrary location and the information necessary for forestry in the environment of the location as point information is displayed. When the point registration button 10 is tapped, as shown in FIG. 10(A), the control unit 2002 causes the display unit 2005 to display a selection form 17 for selecting whether to specify and register the position information of the position where the information is to be registered by tapping on the map, to specify and register the current location information as the position where the information is to be registered, or to specify and register the position where the information is to be registered by latitude and longitude. Note that these can be selected by radio buttons. When it is selected to specify and register by tapping on the map, the control unit 2002 causes the display unit 2005 to display an input map (not shown), and stores the position information on the map tapped by the user in the storage unit 2003 as the position information to be registered. When it is selected to specify the current location information as the position where the information is to be registered, the control unit 2002 stores the current location information in the storage unit 2003 as the position information of the position where the information is to be registered. When it is selected to specify and register by latitude and longitude, the control unit 2002 causes the display unit 2005 to display an input form (not shown) for inputting latitude and longitude, and stores the input latitude and longitude in the storage unit 2003 as the position information of the position where the information is to be registered.

[0069] Thereafter, as shown in FIG. 10(B), the control unit 2002 causes the display unit 2005 to display a point information input form 18 for inputting point information.

[0070] The above-mentioned "information necessary for forestry in the environment of the location" includes, for example, felled trees, survey trees, wind-thrown trees, pest damage, standing trees, vines, dead trees, growing trees, road network collapse, road shoulder collapse, road surface erosion, slope collapse, fallen trees, bear feces, beehives, landslides, collapsed areas, rockfalls, damaged structures, bad roads, boundary markers, boundary finding tables, gates, forest entry reporting offices, etc. existing, forest road gate positions, key numbers, road widths, road surface conditions, timber numbers, intersection evacuation locations, U-turn locations, positions of earthworks, etc.

[0071] As shown in FIG. 10(B), the point information input form 18 includes an information icon button 181 in which the “information necessary for forestry in the environment of the place to be registered” is represented by an icon, a message field 182 for optionally inputting a message, a danger point button 183 for registering the place as a dangerous place, a camera button 184 for photographing and registering the state of the place, and a decision button 185 for determining and registering the input information.

[0072] When the information icon button 181 to be registered by the user is selected and the decision button 185 is tapped, the control unit 2002 associates the information corresponding to the selected information icon button 181 with the position information of the position to be registered as described above and the time information at that time, and stores it in the storage unit 2003 as point information. When the information icon button 181 to be registered by the user is selected, a message is input in the message field 182, and then the decision button 185 is tapped, the control unit 2002 associates the information corresponding to the selected information icon button 181 and the message information with the position information of the position to be registered as described above and the time information at that time, and stores it in the storage unit 2003 as point information. Further, when the information icon button 181 is selected by the user and the camera button 184 is further tapped, the control unit 2002 activates the imaging unit 2012, the surrounding state is photographed by the user, and then when the decision button 185 is tapped, the control unit 2002 associates the information corresponding to the selected information icon button 181 and the photographed image information with the position information of the position to be registered as described above and the time information at that time, and stores it in the storage unit 2003 as point information. Note that in the message field 182, it is possible to use it when registering a key number or a road width, or to input an arbitrary transmitted message.

[0073] Also, when the information icon button 181 that the user wants to register is selected and the danger point button 183 is turned on and the decision button 185 is tapped, the control unit 2002 associates the information corresponding to the selected information icon button 181, the message information 182, and the image information with the position information of the position where the user wants to register and the time information at that time, and stores them in the storage unit 2003 as danger point information.

[0074] In the above-described setting form 7, as shown in FIG. 7, there is provided a danger range distance input field 75 for inputting a distance for setting a danger range centered on the registered danger point. The control unit 2002 is configured to store the distance input by the user in the danger range distance input field 75 in the storage unit 2003. The above-described danger range distance input field 75 displays selectable distances in advance in a pull-down manner, and the user selects an appropriate distance as the danger range from the displayed distances. Here, the danger range corresponds to the "predetermined range" in the claims.

[0075] When point information or danger point information is registered, the control unit 2002 transmits it from the short-range communication unit 2004 to the wireless communication device 3 carried together. When the point information or danger point information is received by the short-range communication unit 3004 of the wireless communication device 3, the control unit 3002 of the wireless communication device 3 causes the point information or danger point information to be transmitted to the wireless communication device 3 carried by other mobile terminal devices 2 in the group.

[0076] For example, when point information or danger point information is registered in the mobile terminal device 2 (102) carried by the worker 1, the point information and danger point information are transmitted via the wireless communication device 3 (103) to the wireless communication devices 3 (203) and 3 (303) carried by the workers 2 and 3.

[0077] When the short-range communication units 3004 of the wireless communication devices 3(203) and 3(303) carried by workers 2 and 3 receive point information or dangerous point information, the control units 3002 of the wireless communication devices 3(203) and 3(303) cause the respective mobile terminal devices 2(202) and 2(302) carried by both of them to transmit the point information or dangerous point information. When the short-range communication units 2004 of the mobile terminal devices 2(202) and 2(302) receive the point information or dangerous point information, the control units 2002 of the mobile terminal devices 2(202) and 2(302) cause the storage unit 2003 to store the point information or dangerous point information.

[0078] In the above, the case where point information or dangerous point information is registered in the mobile terminal device 2(102) carried by worker 1 has been described. However, when point information or dangerous point information is registered in the mobile terminal devices 2(202) and 2(302) carried by workers 2 and 3, the same processing is performed with other mobile terminal devices 2 within group G1 and the like.

[0079] The control unit 2002 of each mobile terminal device 2 is configured to display point information or dangerous point information on the respective display units 2005. For example, as shown in FIG. 6, the point information is displayed at its position by point information icons indicating the respective information contents, such as the felled tree icon 19, the standing tree icon 20, and the slope icon 21. Also, as shown in FIG. 6, the dangerous point information is displayed at its position by a warning icon 22 so that it can be recognized as dangerous. Further, each of the icons 19 to 22 also functions as an input unit 2010. When each of the icons 19 to 22 is tapped, the control unit 2002 causes the display unit 2005 to display the message information or image information linked and stored thereto. When the dangerous point icon 22 is tapped, the control unit 2002 causes the display unit 2005 to display the information, message information, or image information corresponding to the selected information icon button 73. FIG. 6 illustrates the display when the dangerous point icon 22 is tapped.

[0080] When the control unit 2002 of each mobile terminal device 2 determines that the latest position information of each worker has entered the danger range of the danger point where it is registered, as shown in FIG. 9, the display unit 2005 is caused to display an image, characters, or a message notifying of danger. The characters or messages notifying of danger are, for example, the character "Danger" or a message such as "You have entered the danger range. Please confirm immediately and ensure safety." In this case, the display unit 2005 functions as the danger notification unit 2011.

[0081] In addition, for the notification of danger, together with the display on the display unit 2005 or instead of the display on the display unit 2005, a message or beep sound notifying of danger may be emitted from the voice output unit 3007 of the wireless communication device 3 or the voice output unit 2007 of the mobile terminal device 2. Also, when the mobile terminal device 2 has a vibration function such as a smartphone, vibration may be generated by the built-in vibrator.

[0082] Also, in the same manner as the above-described danger range, a warning range where evacuation is not immediately necessary but the surrounding situation needs to be confirmed and a caution range where caution is required are set. When it is determined that the latest position information of the worker has entered each range, in the same manner as the case of the danger range described above, warnings and cautions may be notified respectively.

[0083] In addition, the various input forms, input buttons, and input fields described after paragraph number

[0068] function as an "input unit for inputting position information of an arbitrary place and information necessary for forestry in the environment of the place as point information" and an "input unit for inputting position information of an arbitrary place and information indicating that the place is a danger point as danger point information" in the claims.

[0084] Also, when the in - area determination unit 2009 of each mobile terminal device 2 determines that it is within the area, the control unit 2002 reads out the point information and the danger point information registered by itself from the storage unit 2003 and causes the communication unit 2008 to transmit them to the management server 6. At this time, the point information and the danger point information may be set to transmit new information by comparing the time with the information that has already been transmitted when it was within the area last time. When the management server 6 receives the point information and the danger point information from the mobile terminal device 2, it stores them and transmits them to the management terminal device 5 via the network N.

[0085] Also, referring to FIG. 6, on the display unit 2005 of the mobile terminal device 2, a point sharing button 11 for sharing point information and danger point information with other groups is displayed. When the point sharing button 11 is tapped and then any one of the point information icons 19 - 21 and the attention - arousal icon 22 displayed on the display unit 2005 is tapped, the control unit 2002 causes the display unit 2005 to display a shared - destination group ID input form (not shown) for inputting the ID of the other group with which to share the point information and the danger point information. When the group ID is input on the shared - destination group ID input screen when the mobile terminal device 2 is within the area, the control unit 2002 copies the point information and the danger point information of the tapped icon and causes it to be transmitted to the management server 6 as the point information and the danger information of the shared - destination group. When the mobile terminal device 2 is outside the area and the point sharing button 11 is tapped, the point information and the danger point information are selected, and the shared - destination group ID is input, it is also preferable that the control unit 2002 copies the selected point information and the danger point information, stores them in the storage unit 2003 as the point information and the danger information of the shared - destination group, and causes the management server 6 to transmit the point information and the danger point information when the in - area determination unit 2009 determines that it is within the area.

[0086] On the one hand, when the in - area determination unit 2009 of the mobile terminal device 2 determines that it is within the area, the control unit 2002 determines whether there is point information or dangerous point information of the group to which the own device belongs in the management server 6 and which is not stored in the storage unit 2003 of the own device. If there is, a request signal is sent from the communication unit 2008 via the network N to the management server 6, requesting the management server 6 to send the information. The management server 6 is configured to send the point information and the dangerous point information in response to the request. When the communication unit 2008 receives the point information and the dangerous point information via the network N, the control unit 2002 stores the point information and the dangerous point information in the storage unit 2003 and also displays them on the map of the display unit 2005.

[0087] Furthermore, the mobile terminal device 2 that has received the point information and the dangerous point information may transmit the received point information and the dangerous point information to other mobile terminal devices 2 within the same group via the wireless communication device 3. The control unit 2002 of the other mobile terminal device 2 that has received the point information and the dangerous point information may store the point information and the dangerous point information in the storage unit 2003 and also display them on the map of the display unit 2005.

[0088] In the case of this embodiment, for example, when the worker 1 belonging to the first group G1 taps the point sharing button 11 when the mobile terminal device 2 carried by himself / herself is within the area, then selects and taps the icon of the point information that he / she wants to share with the workers 4 - 6 of the second group G2 among the point information icons 19 - 21 displayed on the display screen, and inputs the group ID of the second group G2 into the displayed shared destination group ID input form, a copy of the point information is transmitted to the management server 6 as the point information of the second group G2.

[0089] After that, for example, when the mobile terminal device 2(402) carried by the worker 4 enters the area, if there is point information or dangerous point information of the second group G2 in the management server 6 that is not stored in the storage unit 2003 of the mobile terminal device 2(402) carried by the worker 4, a request signal is sent to the management server 6 to request that such information be transmitted. Then, in the above example, the point information selected by the worker 1 for sharing with the second group G2 and transmitted to the management server 6 is transmitted from the management server 6 and is displayed on the map of the display unit 2005. Further, the point information may be transmitted by the mobile terminal device 2(402) to the mobile terminal devices 2(502) and 2(602) carried by the other workers 5 and 6 of the second group G2 and also be displayed on the maps of the display units 2005 of the mobile terminal devices 2(502) and 2(602).

[0090] For example, in a case where the first group G1, which is a work team of a certain company, fells trees and then the second group G2, which is a work team of another company, transports and removes the logs after branch removal and cutting into pieces, if the worker of the first group G1 registers the log storage location as point information and shares it with the second group G2, the workers of the second group G2 can quickly and accurately grasp the log storage location, so the work efficiency is improved.

[0091] In this embodiment, when the mobile terminal device 2 is within the area, point information and dangerous point information can be shared between different groups via the management server 6. However, even when the mobile terminal device 2 is outside the area, point information and dangerous point information may be shared between different groups via the wireless communication device 3.

[0092] Also, referring to FIG. 6, a message button 12 for transmitting and receiving text messages with the mobile terminal devices 2 of other workers in the group is displayed on the display unit 2005 of the mobile terminal device 2. When the message button 12 is tapped, as shown in FIG. 11(A), the control unit 2002 causes the display unit 2005 to display a message display screen 23 on which messages transmitted and received in the group in the past are displayed in chronological order. At this time, if there is text data that has been transmitted from the mobile terminal device 2 of another worker in the group, received by the own device, and stored in the storage unit 2003, and is not displayed on the message display screen 23, the control unit 2002 causes the name and icon of the worker who transmitted the message, and the date and time when the message was transmitted, to be displayed on the message display screen 23 together with the message.

[0093] An input reception button 24 for receiving input of a new message is displayed on the message display screen 23. When the input reception button 24 is tapped, as shown in FIG. 11(B), the control unit 2002 causes an input form 25 for inputting a new message to be displayed on the message display screen 23. The input form 25 has a fixed phrase selection column 251 for selecting a message to be transmitted from a list of fixed phrases, a text box 252 for freely inputting text, a notification button 253 for selecting whether to emit a notification sound when another mobile terminal device 2 receives the text message to be transmitted, and a confirmation button 254 for confirming the input information.

[0094] When the confirmation button 254 is tapped in a state where a fixed phrase in the fixed phrase selection field 251 is tapped and selected, the control unit 2002 transmits the text data of the selected fixed phrase from the short-range communication unit 2004 to the wireless communication device 3 carried together. When the text data is received by the short-range communication unit 2004 of the wireless communication device 3, the control unit 2002 of the wireless communication device 3 causes the text data to be transmitted to the wireless communication device 3 carried together with the other mobile terminal devices 2 in the group. In addition, in FIG. 11(B), a state where the fixed phrase "Let's start the morning service." which is a fixed phrase is selected in the fixed phrase selection field 251 is shown.

[0095] When the confirmation button 254 is tapped in a state where a text message is input in the text box 252, the control unit 2002 transmits the text data of the input message from the short-range communication unit 2004 to the wireless communication device 3 carried together. When the text data is received by the short-range communication unit 2004 of the wireless communication device 3, the control unit 2002 of the wireless communication device 3 causes the text data to be transmitted to the wireless communication device 3 carried together with the other mobile terminal devices 2 in the group.

[0096] When the confirmation button 254 is tapped in a state where a fixed phrase is selected or a text message is input in the text box 252 and the notification button 253 is turned ON, the control unit 2002 is configured to transmit notification ON information together with the text data.

[0097] For example, when text data and notification ON information are transmitted from the mobile terminal device 2(102) carried by the worker 1, the text data and notification ON information are transmitted to the wireless communication devices 3(203) and 3(303) carried by the workers 2 and 3 via the wireless communication device 3(103).

[0098] When the text data and notification ON information are received by the short-range communication units 2004 of the wireless communication devices 3(203) and 3(303) carried by the workers 2 and 3, the control units 3002 of the wireless communication devices 3(203) and 3(303) cause the respective mobile terminal devices 2(202) and 2(302) carried by both of them to transmit the text data and notification ON information. When the text data and notification ON information are received by the short-range communication units 2004 of the mobile terminal devices 2(202) and 2(302), the control unit 2002 of the mobile terminal devices 2(202) and 2(302) stores the text data in the storage unit 2003. When the notification ON information is received, the control unit 2002 causes the voice output unit 2007 to output a sound or message notifying that a text message has been received. In addition, when the mobile terminal device 2 has a vibration function such as a smartphone, vibration may be generated by the built-in vibrator.

[0099] In the above, the case where text data and notification ON information are transmitted from the mobile terminal device 2(102) carried by the worker 1 has been described. However, when text data and notification ON information are transmitted from the mobile terminal devices 2(202) and 2(302) carried by the workers 2 and 3, the same processing is performed among the other mobile terminal devices 2 in the group and the like.

[0100] The message button 12, the input reception button 24, and the input form 25 function as an "input unit for inputting a text message" in the claims. The message display screen 23 functions as a "display unit for displaying a text message" in the claims.

[0101] In addition, the control unit 2002 of the mobile terminal device 2 determines whether the worker carrying the mobile terminal device 2 has fallen based on the acceleration and angular velocity detected by an acceleration sensor and a gyro sensor (not shown) built in the mobile terminal device 2. Note that the control unit 2002 and the acceleration sensor and gyro sensor function as a fall detection unit 2003.

[0102] When it is detected that an operator has fallen, the control unit 2002 causes the short-range communication unit 2004 to transmit, to the wireless communication device 3 carried together, a signal notifying of the fall and an ID identifying the operator carrying the portable terminal device 2, in association with each other. When the short-range communication unit 3004 of the wireless communication device 3 receives the signal notifying of the fall and the above ID, the control unit 3002 of the wireless communication device 3 causes these to be transmitted to the wireless communication devices 3 carried together with the portable terminal devices 2 of other operators in the group. When the short-range communication unit 3004 of the wireless communication device 3 of another operator receives the signal notifying of the fall, the control unit 3002 of the wireless communication device 3 of another operator causes the voice output unit 3007 to output a message or a beep sound notifying of the fall.

[0103] For example, when it is determined by the portable terminal device 2(102) carried by operator 1 that operator 1 has fallen, a signal notifying of the fall and the above ID are transmitted from the portable terminal device 2(102) via the wireless communication device 3(103) to the wireless communication devices 3 carried by operators 2, 3(203), 3(303).

[0104] When the short-range communication unit 3004 of the wireless communication devices 3(203), 3(303) carried by operators 2, 3 receives the signal notifying of the fall and the ID of operator 1, the control unit 3002 of the wireless communication devices 3(203), 3(303) causes, for each of the portable terminal devices 2(202), 2(302) carried together, a signal notifying of the fall and the ID of operator 1 to be transmitted. When the short-range communication unit 2004 of the portable terminal devices 2(202), 2(302) receives the signal notifying of the fall and the ID of operator 1, the control unit 2002 of the portable terminal devices 2(202), 2(302) causes the voice output unit 2007 to output a message indicating that operator 1 has fallen.

[0105] In the present embodiment, although the fall detection unit 2003 is provided in the mobile terminal device 2, it may be provided in the wireless communication device 3. Further, in the present embodiment, although a message for notifying a fall is output from the voice output unit 2007 of the mobile terminal device 2, it may be output from the voice output unit 3007 of the wireless communication device 3.

[0106] Also, referring to FIG. 6, on the display unit 2005 of the mobile terminal device 2, a road data creation button 13 for recording the created road is displayed. When the road data creation button 13 is tapped, the control unit 2002 causes the display unit 2005 to display a confirmation screen (not shown) for confirming whether to record road data. Further, after an input for determining to record road data is made from the confirmation screen, when the road data creation button 13 is tapped again, the control unit 2002 causes the display unit 2005 to display a confirmation screen (not shown) for confirming whether to end the recording of road data.

[0107] When the road data creation button 13 is tapped and an input for determining to record road data is made from the confirmation screen, the control unit 2002 stores the above-described movement trajectory as road data in the storage unit 2003 from the time this determination input is made until an input for determining to end the recording of road data is made after the road data creation button 13 is tapped again from the confirmation screen, and causes the road data to be displayed on the map of the display unit 2005 in a line type and / or color different from that of the normal movement trajectory. Further, it is preferable that the color of the line of the road data can be arbitrarily selected and set.

[0108] Therefore, for example, by using the road data creation function in the mobile terminal device 2 of an operator who operates a heavy machine for constructing a work road, the constructed work road is stored and displayed as road data. Also, during a preliminary survey for road network construction, by using the road data creation function, the planned road network can be stored and displayed as road data.

[0109] Also, referring to FIG. 6, a distance measurement button 14 for measuring the distance between two points from a certain point to another point on the map is displayed on the display unit 2005 of the mobile terminal device 2. When the distance measurement button 14 is tapped, the control unit 2002 causes the display unit 2005 to display a selection form (not shown) for selecting whether to measure the straight-line distance between two points or the distance of the route drawn by the user on the map. When any measurement method is selected from the selection form, the control unit 2002 causes the display unit 2005 to display a map form for inputting points such as the points for measuring the distance on the map. When it is selected to measure the straight-line distance between two points from the selection form, when two points, a certain point and another point, for measuring the distance are input by the map form, the control unit 2002 connects the two points with a straight line, calculates the distance, and causes the result to be displayed on the display unit 2005 together with the straight line connecting the two points. Also, when it is selected from the selection form to measure the distance of the route drawn by the user on the map, the control unit 2002 sequentially displays the route from the point tapped by the user on the map of the map display form, while sliding the finger in the tapped state from the point tapped by the user until the finger is lifted off the screen, and when the finger is lifted off the screen, measures the distance of the route drawn by the line and causes the result to be displayed on the display unit 2005.

[0110] According to the position sharing system 1 according to the present embodiment, since the mobile terminal device 2 carried by the worker can communicate via the wireless communication device 3 even outside the radio wave range, it is possible to stably share position information and communicate among workers in a wider range. Also, when any of the mobile terminal devices 2 of the workers in the group comes within the radio wave range, automatically, the position information of the workers in the group is transmitted to the management terminal device 5 via the management server 6. Therefore, when an accident occurs, it is possible to identify the accident location at the on-site office or the like earlier.

[0111] More specifically, when a worker in the group receives a message indicating that a worker has fallen, the text message sending and receiving function is used or a voice call is made with the wireless communication device 3 to confirm the safety of the worker. If there is no response, the position information of the worker who is considered to have fallen can be confirmed on the display unit 2005 and rescue efforts can be initiated. Also, when any worker descends the mountain and requests rescue or an ambulance, when the portable terminal device 2 enters the radio wave range during the descent, automatically and immediately, the position information of the workers in the group is transmitted to the management terminal device 5 via the management server 6, so that the accident location can be grasped quickly at the on-site office.

[0112] In the above-described embodiment, the first group G1 and the second group G2 share the position information, point information, and dangerous point information of the workers only within each group, and perform text message sending and receiving and notification of a worker's fall only within each group, except when the workers want to individually select and share the point information and dangerous point information that they want to share with other groups. However, before entering the mountain, the group ID of other groups, the worker ID of the workers belonging to other groups, and the IDs of each device of the portable terminal, wireless communication device 3, and positioning device 4 carried by each worker belonging to other groups are stored in a linked state, and it is also preferable to enable sharing of only the position information of the workers across groups.

[0113] For example, if there is a group of forestry workers and a group that has entered the mountain with a hunting rifle to exterminate harmful animals such as deer and bears, by sharing the position information of the workers across groups and setting a dangerous range centered on the position of the portable terminal device 2 carried by the worker (hunter) who has the hunting rifle, even if a forestry worker enters that dangerous range, both the nearby hunter and the forestry worker will be notified of the danger, thus preventing accidental firing.

[0114] Note that the position sharing system 1 according to this embodiment has been described by taking the case of use at a forestry site as an example, but it can also be applied to construction sites or other sites with poor radio wave conditions.

Explanation of Symbols

[0115] 1: Location Sharing System 2: Mobile Terminal Device 2002: Control Unit 2003: Memory Unit 2004: Short-Range Communication Unit 2005: Display Unit 2008: Communication Unit 2009: In-Area Judgment Unit 2010: Input Unit 3: Wireless Communication Device 3002: Control Unit 3003: Memory Unit 3004: Short-Range Communication Unit 4: Positioning Device 4002: Control Unit 4003: Memory Unit 4004: Short-Range Communication Unit 5: Management Terminal Device 6: Management Server

Claims

1. A plurality of portable terminal devices each carried by a plurality of workers constituting a group, A wireless communication device carried together with the portable terminal device, Positioning means that is carried together with the portable terminal device and measures the position data of the carrying worker, A management terminal device connected to a network A position sharing system having The portable terminal device A control unit that controls each part of the portable terminal device, A short-range communication unit that communicates with the wireless communication device by short-range wireless, A communication unit that communicates with a base station, A storage unit that stores the position information, An in-range determination unit that determines whether it is within the range where communication with the base station is possible having Among the workers, the portable terminal device carried by one worker is one portable terminal device, the wireless communication device and the positioning means carried together with the one portable terminal device are respectively one wireless communication device and one positioning means, and the portable terminal device carried by another worker is another portable terminal device, and the wireless communication device and the positioning means carried together with the other portable terminal device are respectively another wireless communication device and another positioning means. Then, The position data measured by the one positioning means is acquired by the one portable terminal device, and the control unit of the one portable terminal device stores the position information including the acquired position data in the storage unit. The control unit of the one portable terminal device transmits the position information from the short-range communication unit to the one wireless communication device in a state linked with the ID that identifies the one worker. The one wireless communication device transmits the received position information to the other wireless communication device, and the other wireless communication device transmits the received position information to the short-range communication unit of the other portable terminal device. The control unit of the other portable terminal device stores the received position information in the storage unit in a state linked with the ID that identifies the one worker. When it is determined by the in-range determination unit that it is within the range, the control unit reads out the position information of each worker from the storage unit and causes it to be transmitted by the communication unit. The management terminal device acquires the position information of each worker transmitted from the communication unit of the portable terminal device. A position sharing system characterized by this.

2. The portable terminal device has a display unit that displays an image, Map information is stored in the storage unit, The control unit causes the display unit to display a map based on the map information. The position sharing system according to claim 1, characterized by this.

3. The portable terminal device has a display unit for displaying images, map information is stored in the storage unit, The control unit displays a map on the display unit based on the map information, and displays the position information of each worker on the map. The position sharing system according to claim 1, characterized in that.

4. An input unit provided in the portable terminal device for inputting a distance for setting a danger range centered on the position of the own device, and a danger notification unit for notifying danger, When the danger range is set, the control unit generates the position information in which the danger flag information indicating that the danger range is set and the distance information set in the danger range are set as the danger range information in the position data, When the danger range is set in the one portable terminal device, the one control unit determines whether the position information of the other worker acquired based on the danger range information included in the position information of the one worker enters the danger range. If it is determined that it enters, the danger notification unit notifies danger. The position sharing system according to any one of claims 1 to 3, characterized in that.

5. An input unit provided in the portable terminal device for inputting a distance for setting a danger range centered on the own device, and a danger notification unit for notifying danger, When the danger range is set, the control unit generates the position information in which the danger flag information indicating that the danger range is set and the distance information set in the danger range are set as the danger range information in the position data, When the danger range is set in the one portable terminal device, The control unit of the other portable terminal device determines whether the position information measured by the positioning means carried together with the other portable terminal device and acquired based on the danger range information included in the position information of the one worker acquired enters the danger range. If it is determined that it enters, the danger notification unit notifies danger. The position sharing system according to any one of claims 1 to 3, characterized in that.

6. The position sharing system according to any one of claims 1 to 3, characterized in that it has an input unit provided in the portable terminal device for setting the position information of an arbitrary place and the information necessary for forestry in the environment of the place as point information.

7. An input unit provided in the mobile terminal device for setting the position information of an arbitrary location and information indicating that the location is a dangerous point as dangerous point information, A danger notification unit for notifying danger, The control unit causes the danger notification unit to notify danger when it is determined that the acquired position information falls within a predetermined range from the position of the dangerous point. The position sharing system according to any one of claims 1 to 3.

8. An input unit provided in the mobile terminal device for setting the position information of an arbitrary location and information indicating that the location is a dangerous point as dangerous point information, A danger notification unit for notifying danger, The control unit of the one mobile terminal device transmits the dangerous point information from the short-range communication unit to the one wireless communication device. The one wireless communication device transmits the received dangerous point information to the other wireless communication device. The other wireless communication device transmits the received dangerous point information to the short-range communication unit of the other mobile terminal device. The control unit of the other mobile terminal device stores the received dangerous point information in the storage unit. The control unit of the other mobile terminal device causes the danger notification unit to notify danger when it is determined that the position information measured and acquired by the positioning means carried together with the other mobile terminal device falls within a predetermined range from the position of the dangerous point. The position sharing system according to any one of claims 1 to 3.

9. The mobile terminal device has an input unit for inputting a text message and a display unit for displaying the text message. The control unit of the one mobile terminal device transmits the text data of the text message input from the input unit from the short-range communication unit to the one wireless communication device. The one wireless communication device transmits the received text data to the other wireless communication device. The other wireless communication device transmits the received text data to the short-range communication unit of the other mobile terminal device. The position sharing system according to any one of claims 1 to 3.

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