JP6302167B2 - Projection system - Google Patents

Description

  The present invention relates to a projection system that provides information to a user by projecting information transmitted from a portable terminal possessed by the user from a projector possessed by the user, and in particular, the portable terminal and the projector provide information to the user. The present invention relates to a projection system that monitors whether it can be presented.

  With the recent development of information communication networks, various types of information such as images and texts can be received by portable communication devices. Thereby, for example, an emergency agent who rushes to the security contractor can check the case information such as the contents of the case at the security contractor.

  Conventionally, Patent Document 1 proposes a wearable imaging device that projects information received by a portable communication device onto a user's palm, a building wall, or the like by a portable projector attached to the user's body. ing. By using such a device, the emergency response staff can smoothly carry out emergency response while checking the case information in a state where both hands can be used freely (hands-free).

  In order to reliably transmit the case information to the emergency responder, it is desirable to constantly monitor whether the portable communication device and the portable projector can operate normally. Patent Document 2 discloses an electronic camera system that monitors a communication state between a communication device and a projector every predetermined time.

JP-T-2006-502444 JP 2006-157349 A

  However, conventionally, the time interval for monitoring the communication state has not been set in consideration of the power consumption generated for the monitoring. Since a portable communication device or a portable projector is driven by a battery, there is a problem that if the communication state is frequently monitored and power is consumed at all times, the battery is replaced during a hands-free emergency response.

  Therefore, an object of the present invention is to provide a projection system that can prevent battery replacement or the like in a situation where hands-free is required.

The projection system of the present invention includes a portable communication terminal driven by a battery, a portable projector driven by a battery that projects information input from the portable communication terminal, and a current position for detecting a current position of the portable communication terminal a detector, comprising: a target position setting unit for setting a target position, and a determining device abnormality determining section for determining whether or not the projector is a non apparatus abnormality state projecting the information, before Symbol apparatus abnormality determination unit Is characterized by determining whether or not the device is in an abnormal state with a higher frequency as the distance between the current position and the target position is shorter.

  In one embodiment of the present invention, when the distance between the current position and the target position is equal to or less than the first distance, the device abnormality determination unit is more frequent than when the distance is longer than the first distance. It is characterized by determining whether it is in an abnormal state.

In another embodiment of the present invention, the device abnormality determination unit is configured to reduce the distance between the current position and the target position to at least a first distance or less and a second distance or less that is shorter than the first distance. At this point, it is determined whether or not the device is in an abnormal state.

  In still another embodiment of the present invention, the device abnormality determination unit includes a transmission unit that transmits a test signal from the portable communication terminal to the projector, and a reception unit that receives a response signal from the projector with respect to the test signal. And determining means for determining that the device is in an abnormal state when no response signal is received.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that a portable terminal and a projector will be in the state which cannot normally present information to a user in the condition where a user is required hands-free.

It is a system configuration figure of an embodiment. It is a system use explanatory view of an embodiment. It is a detailed block diagram of an embodiment. It is a flowchart (the 1) of an embodiment. It is a flowchart (the 2) of an embodiment. It is a flowchart (the 3) of an embodiment. It is a flowchart (the 4) of an embodiment.

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

  The system configuration of this embodiment is shown in FIG. In the following embodiment, a case will be described as an example in which case information is transmitted to an emergency responder rushing to a security contractor.

  In the projection system 1, when a case such as an intrusion abnormality or an equipment abnormality occurs, the case management apparatus 2 generates case information related to the case. Then, the case management apparatus 2 transmits the case information to the mobile communication terminal 4 possessed by the emergency responder who wants to rush to the point where the case occurred. When the emergency response member receives the case information, the emergency response member rushes to the incident occurrence point. Incident information is relayed by the portable communication terminal 4 carried by the emergency response person who is rushing to the incident occurrence point, and the incident information is transmitted to the incident person's palm, the wall of the incident occurrence point, etc. by the projector 6 carried by the incident response person. Projected on. Thereby, the projection system 1 enables the emergency response staff to carry out emergency response work while checking the case information in a hands-free manner.

  The portable communication terminal 4 and the projector 6 confirm whether or not the communication is possible in preparation for the communication of the case information in order to determine whether or not the case information can be normally projected by the projector 6. Test communication is performed, and the confirmed communication state is notified to the emergency responder carrying the mobile communication terminal 4 and the projector 6.

  In the projection system 1, the mobile communication terminal 4 is communicably connected to the case management device 2 and the map information generation device 7 via the wide area communication network 3. In addition, the mobile communication terminal 4 is connected to the projector 6 via the short-range communication network 5 so as to be communicable. Further, the mobile communication terminal 4 receives a GPS signal from the global positioning system (GPS) 8.

  The case management apparatus 2 is installed in a remote place such as a security center where a monitor is stationed. A device composed of a server and an operation terminal.

  The case management apparatus 2 stores in advance information on monitoring equipment such as an intrusion detection sensor and facility monitoring sensor, and information on a building in which the monitoring equipment is installed in association with information on the monitoring equipment. Further, the case management apparatus 2 stores in advance information on the emergency response personnel and terminal information such as the network address of the mobile communication terminal 4 carried by the emergency response personnel in association with the information.

  When the incident management apparatus 2 receives a signal indicating that there is an abnormality from the monitoring equipment of the security contractor, the incident management apparatus 2 notifies the monitoring person of the occurrence of the abnormality and information on the monitoring equipment that has detected the abnormality, and the building where the monitoring equipment is installed. Information and information on the coping personnel capable of coping with the abnormality are displayed on the operation terminal and notified to the monitoring staff. When the monitoring person decides the emergency response person to rush to the point of occurrence of the incident from these information and inputs the decision from the operation terminal, the server identifies the case ID that uniquely identifies the case, the monitoring device that detected the abnormality. The case information including the information and the position information (target position) of the case occurrence point which is the building where the monitoring device is installed is transmitted to the mobile communication terminal 4 associated with the coping person. The location information (target location) of the incident occurrence point is the latitude and longitude of the incident occurrence point or the address.

  The wide area communication network 3 is a communication network such as the Internet or a public telephone line. The wide area communication network 3 connects the mobile communication terminal 4 and the case management apparatus 2, and the mobile communication terminal 4 and the map information generation apparatus 7. The wide area communication network 3 and the portable communication terminal 4 are wirelessly connected.

  The mobile communication terminal 4 is a communication terminal device that can be carried by a coping staff, such as a smartphone or a mobile phone. The mobile communication terminal 4 is carried by each of a plurality of emergency responders. The mobile communication terminal 4 communicates with the case management device 2 and the map information generation device 7 via the wide area communication network 3. The mobile communication terminal 4 receives the case information including the target position from the case management apparatus 2. In addition, the mobile communication terminal 4 transmits the current position and the target position to the map information generation device 7, and the map information generation device 7 uses the actual distance calculated by the map information generation device 7 in consideration of the route from the current position to the target position. Receive from. The mobile communication terminal 4 communicates with the projector 6 via the short-range communication network 5, and transmits the case information image data (case image) received from the case management apparatus 2 to the projector 6.

  Furthermore, the mobile communication terminal 4 performs a test communication with the projector 6 to determine the communication state with the projector 6 and notifies the cooperator of the communication state. When executing the test communication, a GPS signal is received from the GPS 8 to determine the current position of the terminal itself, the distance from the current position to the target position is acquired, and the frequency of the test communication is controlled according to the distance. This distance is acquired by receiving the actual distance from the map information generating device 7 via the wide area communication network 3.

  The near field communication network 5 is a near field communication network such as Bluetooth. The short-range communication network 5 connects the mobile communication terminal 4 carried by the emergency coordinator and the projector 6 carried by the coordinator. A wired communication network such as USB may be used.

  The projector 6 is a small-sized projector that can be carried by an emergency agent attached to a breast pocket or a shoulder. The projector 6 projects the case information image data (case image) received from the mobile communication terminal 4 via the short-range communication network 5 onto the palm of the coordinator, the wall of the case occurrence point, and the like. The projector 6 determines the communication state with the mobile communication terminal 4 to determine whether or not the case information can be normally projected as necessary, and notifies the cooperator of the communication state.

  Similar to the case management device 2, the map information generation device 7 is a device installed in a remote place such as a security center. The map information generation device 7 stores map data including information on each building where the monitoring device is installed and road information, and receives the current position and the target position of the mobile communication terminal 4 from the mobile communication terminal 4 via the wide area communication network 3. Then, a route from the current position to the target position is derived, and the actual distance of the derived route is transmitted to the mobile communication terminal 4.

  The GPS 8 is a system including a plurality of GPS satellites, and these GPS satellites transmit GPS signals toward the ground.

  Next, an example of the usage image of the present embodiment is shown in FIG.

  As shown in FIG. 2 (a), the emergency agent 9 is wearing the projector 6 on clothes (chest part) and the portable communication terminal 4 on the breast pocket. When the emergency responder 9 confirms the case information 10, as shown in FIG. 2A, the incident light 11 of the case image generated from the case information 10 is projected from the projector 6 onto the palm. Then, as shown in FIG. 2B, the projected image of the case image (case information 10) is displayed on the palm, and the emergency response person 9 can confirm the case information 10.

  FIG. 3 is a diagram showing the configuration of the mobile communication terminal 4 and the projector 6.

  The mobile communication terminal 4 includes a wide area communication I / F 40, a near field communication I / F 42, a GPS receiver 43, an acoustic output unit 44, a storage unit 45, and a time measuring unit 46, and these are connected to the control unit 41. Moreover, the power supply part 47 which supplies electric power to these each part is included.

  The wide area communication I / F 40 is an interface circuit that wirelessly connects the mobile communication terminal 4 to the wide area communication network 3. The wide area communication I / F 40 outputs information received via the wide area communication network 3 to the control unit 41. Further, the information input from the control unit 41 is sent to the wide area communication network 3.

  The control unit 41 is an arithmetic device such as a CPU (Central Processing Unit), a DSP (Digital Signal Processor), or an MCU (Micro Control Unit). The control unit 41 functions as each of these units by reading from the storage unit 45 and executing a program describing the operations of the case information processing unit 410, the device abnormality determination unit 411, and the current position detection unit 412.

  The near field communication I / F 42 is an interface circuit that wirelessly connects the mobile communication terminal 4 to the near field communication network 5. The near field communication I / F 42 inputs information received via the near field communication network 5 to the control unit 41. Further, the information input from the control unit 41 is sent to the short-range communication network 5.

  The GPS receiver 43 is an antenna circuit that receives a GPS signal from the GPS 8 and outputs the received GPS signal to the control unit 41.

  The sound output unit 44 is a headphone terminal and a headphone that reproduces the sound signal input from the control unit 41 and notifies the coordinator. A speaker may be used.

  The storage unit 45 is a memory device such as a ROM (Read Only Memory) or a RAM (Random Access Memory). The storage unit 45 stores various programs and various data, and inputs and outputs them with the control unit 41. Various data includes case information 10 including a target position and a current position.

  The timer 46 is a circuit that measures the current time and outputs it to the controller 41.

  The power supply unit 47 includes a battery, a transformer, wiring, and a start switch. The power supply unit 47 supplies power to each unit of the mobile communication terminal 4.

  The case information processing unit 410 converts the received case information 10 into image data, generates a signal that includes the case information 10 (case image) converted into image data and sets the destination as the projector 6, and generates the short-range communication I / O. Output to F42. In addition, the case information processing unit 410 sets the target position included in the received case information 10 as the express destination of the emergency responder 9 who has the mobile communication terminal 4. The case information processing unit 410 functions as a target position setting unit of the present invention.

  The device abnormality determination unit 411 determines whether or not the projector 6 is in a state where the case image can be normally projected. Specifically, the communication state is determined by performing test communication with the projector 6 at a predetermined test execution interval. The device abnormality determination unit 411 generates a test packet (test signal) addressed to the projector 6 and outputs it to the short-range communication I / F 42, and a response packet from the projector 6 to the test signal within a predetermined waiting time from the output. When (response signal) is received, it is determined that communication is possible. The device abnormality determination unit 411 determines that communication is impossible when the response signal is not received even after the waiting time is exceeded, and outputs predetermined warning sound data to the sound output unit 44 to notify the coping staff. The waiting time is set shorter than the test execution interval of test communication. For example, 500 milliseconds. The cause of the inability to communicate is that the projector 6 has run out of battery or forgot to turn it on. Further, misplacement after operating the mobile communication terminal 4 also becomes a cause of communication failure. Upon receiving a notification that communication is not possible, the emergency responder checks the power source and performs recovery work such as battery replacement or spare battery installation as necessary. The state incapable of communication is a device abnormal state, in which a case image cannot be input from the mobile communication terminal 4 to the projector 6. Further, various information (such as response signals) cannot be input from the projector 6 to the mobile communication terminal 4. That is, the projector 6 cannot project the case image normally.

  Here, the device abnormality determination unit 411 may monitor the remaining battery level of the power supply unit 47, and may determine that the device is in an abnormal state when the remaining amount becomes a predetermined value or less. Alternatively, the remaining battery level of the power supply unit 66 may be received from the projector 6 as a signal, and it may be determined that the device is abnormal when the remaining level is equal to or lower than a predetermined level. You may perform the same determination in the apparatus abnormality determination part 611 mentioned later. The test signal is transmitted between the mobile communication terminal 4 and the projector 6. Therefore, when receiving a test signal from the projector 6, the device abnormality determination unit 411 generates a response signal addressed to the projector 6 and outputs the response signal to the short-range communication I / F 42.

  Note that when the test signals are transmitted to each other, simultaneous transmission results in useless battery consumption. Therefore, the mobile communication terminal 4 and the projector 6 alternately transmit test signals. For this purpose, the device abnormality determination unit 411 transmits the test execution address and the response signal addressed to the projector 6 including the test execution interval, and shares the test execution interval with the projector 6.

  The frequency of reception of the case information 10 is highest during the coping operation at the case occurrence point. For this reason, it is desirable to suppress power consumption by test communication as much as possible before arrival at the incident occurrence point. In addition, if the case information becomes unreceivable or cannot be projected during the response work at the incident occurrence point and a recovery operation occurs, the smooth response work by hands-free is hindered. For this reason, it is desirable that the projector 6 confirms whether or not the projector 6 can normally project the case image before reaching the case occurrence point, and if necessary, finishes the recovery operation.

  Considering the above, when the distance between the current position and the incident occurrence point is equal to or less than a predetermined distance, the test communication is performed at a higher frequency than before. In addition, the device abnormality determination unit 411 sets the test execution interval to be shorter as the distance between the current position and the incident occurrence point is shorter. As another form, the device abnormality determination unit 411 may set the test communication execution time interval (test execution interval) to be shorter after the incident occurs than before the incident occurs. Furthermore, test communication may be performed prior to the occurrence of a case (standby) without performing the test communication. Further, when the device abnormality determination is performed using the remaining battery level, the interval for checking the remaining battery level may be set as described above.

  In addition, when it is determined that communication is not possible during movement by the vehicle, the emergency responder temporarily stops the vehicle on a roadside belt or the like to ensure safety and performs recovery work.

  The specific test execution interval setting in this embodiment is as follows.

  First, when the portable communication terminal 4 has not received the case information (standby), the test execution interval is set to 60 seconds to suppress battery consumption. When the mobile communication terminal 4 receives the case information, the test execution interval is shorter than when the case information is not received, but the distance from the current position to the case occurrence point (target position) is longer than the first distance. In this case, it is set to 30 seconds (while moving to reach a predetermined near point). The first distance is, for example, 2.5 km. This is the distance which can secure the required time of 5 minutes by estimating the average moving speed of the urban area as 30 km / h. The average moving speed at night may be estimated as 35 km / h, and may be switched to 2.5 km during the day and 3 km at night. For example, it is from 5:00 to 21:00 during the day and from 21:00 to 5:00 at night.

  When the distance from the current position to the target position is less than the first distance and longer than the second distance, the test execution interval is set to 10 seconds. The second distance is, for example, 300 m. As described above, when the distance between the current position and the incident occurrence point (target position) is equal to or less than the predetermined distance, it is determined whether or not the device is abnormal with a higher frequency than when the distance is longer than the distance. Thus, it is possible to reliably secure an opportunity for recovery work performed by temporarily stopping the vehicle. If the distance from the current position to the target position is less than or equal to the second distance, the test execution interval is set to 1 second. This is for early detection of misplacement. Here, you may make it perform test communication at the timing which each reached below 1st distance and 2nd distance. At this time, the execution interval may be changed in accordance with the timing of the test communication. The current position is input from the current position detection unit 412. The target position is extracted from the case information 10 by the case information processing unit 410 and set in the mobile communication terminal 4. The distance is acquired from the map information generation device 7. Specifically, the device abnormality determination unit 411 transmits the current position and the target position to the map information generation device 7 and receives an actual distance from the map information generation device 7 in consideration of the route from the current position to the target position. Here, approximately, the device abnormality determination unit 411 may calculate a linear distance between the current position and the target position.

  The current position detection unit 412 calculates the current position of the mobile communication terminal 4 from the GPS signal received from the GPS 8 via the GPS receiver 43 and outputs the current position to the device abnormality determination unit 411. The current position information is a latitude and longitude value.

  The projector 6 includes a short-range communication I / F 60, a projection unit 62, a storage unit 63, and a timer unit 64, and these are connected to the control unit 61. A power supply unit 66 that supplies power to these units is also included.

  The near field communication I / F 60 is an interface circuit that wirelessly connects the projector 6 to the near field communication network 5. The near field communication I / F 60 outputs information received via the near field communication network 5 to the control unit 61. Further, the information input from the control unit 61 is sent to the short-range communication network 5.

  The control unit 61 is an arithmetic device such as a CPU, DSP, or MCU. The control unit 61 functions as each of these units by reading out the program describing the operations of the case information processing unit 610, the device abnormality determination unit 611, and the like from the storage unit 63 and executing the program.

  The projection unit 62 includes optical components such as a light source and a mirror and a display element such as a DMD (Digital Micromirror Device) device. The projection unit 62 projects the image data input from the control unit 61.

  The storage unit 63 is a memory device such as a ROM or a RAM. The storage unit 63 stores various programs and various data, and inputs and outputs them with the control unit 61. Various data includes image data (case image) of the case information 10.

  The timer unit 64 is a circuit that measures the current time and outputs it to the controller 61.

  The projection stop switch 65 is a button and a switch circuit. The projection stop switch 65 is operated by the coordinator to instruct projection stop when the projection unit 62 is projecting image data.

  The power supply unit 66 includes a battery, a transformer, wiring, and a start switch. The power supply unit 66 supplies power to each unit of the projector 6.

  The case information processing unit 610 displays the case information 10 by outputting image data (case image) of the case information 10 received from the mobile communication terminal 4 via the short-range communication I / F 60 to the projection unit 62.

  The device abnormality determination unit 611 performs test communication with the mobile communication terminal 4 at the test execution interval to determine the communication state. When the device abnormality determination unit 611 receives a test signal from the mobile communication terminal 4, the device abnormality determination unit 611 generates a response signal for the test signal and outputs the response signal to the short-range communication I / F 60. Also, the test execution interval from the test signal to the next test communication is extracted, and after the test execution interval has elapsed, a test signal addressed to the mobile communication terminal 4 is generated and output to the short-range communication I / F 60. The device abnormality determination unit 611 determines that communication is possible when a response signal from the mobile communication terminal 4 to the test signal is received within a predetermined waiting time from the output. The waiting time is, for example, 500 milliseconds. The test communication means 611 determines that communication is impossible when the response signal is not received even after the waiting time is exceeded, and instructs the projection unit 62 to turn on the light in a predetermined pattern to notify the coping staff. For example, a pattern such as blinking multiple times is instructed.

  Next, the operation of this embodiment will be described.

  When the activation switch of the power supply unit 47 of the mobile communication terminal 4 is switched to ON, each unit is activated. The case information processing unit 410 and the device abnormality determination unit 411 of the control unit 41 operate in parallel.

  FIG. 4 is a flowchart showing the operation of the case information processing unit 410.

  Steps S10 to S19 are repeatedly executed in a predetermined cycle.

  The case information processing unit 410 confirms whether or not the wide area communication I / F 40 has received new case information from the case management apparatus 2 (S10). If it has been received (YES in S10), the location information (target location) of the case occurrence point is extracted from the case information 10 and set in the mobile communication terminal 4 (S11). Further, in order to project the received case information 10, the contents of the case information 10 are converted into image data to generate a case image (S12). For example, when the case information 10 is character string data, a case image in which each character is laid out in a predetermined image size is generated. If it is image data, it is enlarged or reduced to fit the default image size. Then, the case information processing unit 410 stores the received case information 10, the extracted target position, and the generated case image in the storage unit 45. In addition, reception sound data (such as voice data “case information received”) stored in advance in the storage unit 45 is output to the sound output unit 44 (S13). The sound output unit 44 reproduces the received sound and notifies the coordinator of the reception.

  On the other hand, when new incident information 10 is not received in the cycle (NO in S10), incident information processing means 410 skips steps S11 to S13.

  Next, the case information processing unit 410 refers to the storage unit 45 and confirms the presence / absence of a communication success flag (S14). The communication success flag will be described later. When there is no communication success flag in storage unit 45, case information processing unit 410 skips steps S15 to S17 (NO in S14). When there is a communication success flag in storage unit 45 (YES in S14), case information processing unit 410 checks the communication state (result of test communication) stored in storage unit 45 (S15). If the communication state is “communicable” (YES in S15), the process proceeds to S16.

  S16 is a process of switching the presence / absence of the transmission of the case image according to the presence / absence of the movement of the emergency response staff possessing the mobile communication terminal 4. This process is designed to prevent incident information from projecting when the emergency response staff is moving (or running and moving) in a vehicle, which can result in an unsafe situation due to visual inspection of the incident information. It is done for the purpose of ensuring. Although not described in detail in the present embodiment, the mobile communication terminal 4 is equipped with an acceleration sensor or a speed sensor, and when the acceleration or the moving speed is a value corresponding to the vehicle traveling, it is “moving”. It may be determined. If it is not a value corresponding to the vehicle traveling, it may be determined as “not moving”. The movement determination may be performed by the case information processing unit 410 or may be performed by newly providing another configuration. If it is determined that it is not moving (NO in S16), the case image is output to the short-range communication I / F 42 and transmitted to the projector 6 (S17). At this time, the case image for which transmission has been completed is deleted from the storage unit 45. When the case image is deleted, a communication success flag is set. If the case image cannot be transmitted, the communication success flag in the storage unit 45 is deleted.

  On the other hand, when the communication state is incapable of communication (NO in S15), case information processing unit 410 skips steps S16 to S17. As a result of the movement determination, when it is determined that the movement is in progress (YES in S16), case information processing section 410 skips step S17.

  Next, the case information processing unit 410 confirms whether the wide area communication I / F 40 has received a case deletion instruction from the case management apparatus 2 (S18). The case erasure instruction is a signal that is transmitted to the mobile communication terminal 4 carried by the counselor by operating the case management device 2 by the supervisor of the security center based on the report on the end of coping with the case by the coordinator. Includes at least a predetermined code meaning deletion and a case ID for specifying case information 10 to be deleted. If the case deletion instruction has been received, the corresponding case information 10 is deleted from the storage unit 45 (S19). When the case information 10 becomes zero due to the deletion, the test communication is performed at the test execution interval (for example, 60 seconds) before the case information 10 is received, that is, before the case information 10 is received from the security center. become.

  5 and 6 are flowcharts showing the operation of the device abnormality determination unit 411. FIG. The processes in steps S30 to S42 are repeatedly executed in a predetermined cycle shorter than 1 second which is the lower limit value of the test execution interval of the test communication.

  First, the device abnormality determination unit 411 sets a test execution interval (S30). This setting process will be described with reference to FIG.

  In FIG. 6, first, the device abnormality determination unit 411 checks the presence / absence of the case information 10 with reference to the storage unit 45 (S300). If there is no case information 10 (NO in S300), the test execution interval is set to 60 seconds (S301). If the previously set test execution interval is not 60 seconds, the current setting is stored in the storage unit 45 separately from the previous setting so that the setting change can be recognized. After the setting, the process proceeds to step S31 in FIG. If there is case information 10 (YES in S300), the current time is acquired from the time measuring unit 46 and compared with the positioning time in the storage unit 45 (S302). If the current time exceeds the positioning time, it is determined that the positioning time has arrived (YES in S302), and the current position is calculated from the GPS signal of the GPS receiver 43 (S303).

  Next, the device abnormality determination unit 411 generates a distance request signal addressed to the map information generation device 7 including the current position calculated by the current position detection unit 412 and the target position stored in the storage unit 45, The signal is output to the wide area communication I / F 40 (S304).

  Next, the device abnormality determination unit 411 calculates the next positioning time and stores it in the storage unit 45 (S305). If the test execution interval is either 10 seconds or 30 seconds, the next positioning time is calculated by adding the test execution interval to the positioning time of the current cycle. If the test execution interval is 1 second, the next positioning time is calculated by adding 10 seconds to the positioning time of the current cycle.

  On the other hand, when the positioning time has not yet arrived (NO in S302), device abnormality determination unit 411 skips steps S303 to S305.

  Next, the device abnormality determination unit 411 confirms whether the wide area communication I / F 40 has received the distance signal from the map information generation device 7 (S306). If it has been received (YES in S306), the distance value is extracted from the distance signal (S307), and the current time is acquired from the timer 46 (S308). Then, the test execution interval is set based on the acquired distance and the current time. If the distance is 0.3 km or less (YES in S309), the test execution interval is set to 1 second (S310). If the previously set test execution interval is not 1 second, the current setting is distinguished from the previous setting and stored in the storage unit 45 so that the setting change can be recognized. After the setting, the process proceeds to step S31 in FIG.

  If the distance is longer than 0.3 km (NO in S309), device abnormality determination unit 411 proceeds to step S311. If the current time is between 5 o'clock indicating daytime and before 21:00 and the distance is 2.5 km or less, or the current time is after 21 o'clock indicating night and is before 5 o'clock the next time and the distance is less than 3.0 km (YES in S311), the test execution interval is set to 10 seconds (S312). If the previously set test execution interval is not 10 seconds, the current setting is stored in the storage unit 45 separately from the previous setting so that the setting change can be recognized. After the setting, the process proceeds to step S31 in FIG.

  When the current time indicates daytime and the distance is longer than 2.5 km, and when the current time indicates night and the distance is longer than 3.0 km (NO in S311), the test execution interval is set to 30 seconds ( S313). If the previously set test execution interval is not 30 seconds, the current setting is stored in the storage unit 45 separately from the previous setting so that the setting change can be recognized. When the above process is completed, the process proceeds to step S31 in FIG.

  With reference to FIG. 5 again, step S31 and subsequent steps will be described.

  In FIG. 5, the device abnormality determination unit 411 refers to the storage unit 45 and confirms whether the test execution interval has been changed (S31). If it has been changed (YES in S31), the next test time is changed accordingly (S32). Calculates as the next test time the time obtained by adding the time obtained by doubling the test execution interval set this time to the time obtained by subtracting the time obtained by doubling the test execution interval set last time from the currently set next test time. The next test time of 45 is updated. The reason for the double is that the portable communication terminal 4 and the projector 6 transmit test signals alternately.

  If the test execution interval has not been changed (NO in S31), device abnormality determination unit 411 skips step S32.

  Next, the device abnormality determination unit 411 acquires the current time from the time measuring unit 46 and compares it with the test time of the storage unit 45 (S33). If the current time exceeds the test time, it is determined that the test time has arrived (YES in S33). The test execution interval of the storage unit 45 is read to generate a test signal addressed to the projector 6 including the test execution interval, and is output to the short-range communication I / F 42 (S34). The time at this time is acquired as the transmission time. Further, the next test time in the storage unit 45 is updated with a new next test time obtained by adding the time obtained by doubling the test execution interval read in step S34 to the test time used in step S33 (S35). The reason for the double is that the portable communication terminal 4 and the projector 6 transmit test signals alternately.

  After transmitting the test signal, the device abnormality determination unit 411 confirms whether the short-range communication I / F 42 has received the response signal from the projector 6 (S36), and the current time has passed the waiting time from the transmission time and timed out. Confirmation (S37) is repeated. If the response signal is received (YES in S36), the communication unit identification code indicating that communication is possible is stored in the storage unit 45, assuming that communication with the projector 6 is possible (S38). If time-out occurs (YES in S37), it is determined that communication with the projector 6 is disabled, and a storage state identification code indicating communication failure is stored in the storage unit 45 (S39) and stored in the storage unit 45 in advance. The alarm sound data (such as voice data “cannot communicate with the projector”) is output to the sound output unit 44 (S40). The sound output unit 44 reproduces a warning sound and notifies the cooperator that communication is impossible. By notifying with sound, it is possible to reliably notify the counselor even when the mobile communication terminal 4 is not exposed as shown in FIG.

  If the test time has not yet arrived in the current cycle (NO in S33), device abnormality determination unit 411 skips steps S34 to S40.

  Next, the device abnormality determination unit 411 confirms whether the short-range communication I / F 42 has received the test signal from the projector 6 (S41). If received (YES in S41), the test execution interval in the storage unit 45 is read, a response signal addressed to the projector 6 including the test execution interval is generated, and output to the short-range communication I / F 42 (S42). ). When the above process is completed, the process returns to S30 to execute the next cycle.

  When the start switch of the power supply unit 66 of the projector 6 is turned ON, each unit is started. Immediately thereafter, the control unit 61 cuts off the power supply to the projection unit 62 in order to save power. The case information processing unit 610 and the device abnormality determination unit 611 of the control unit 61 operate in parallel.

  The operation of the case information processing unit 610 will be described.

  First, the case information processing unit 610 confirms whether the short-range communication I / F 60 has received a case image from the mobile communication terminal 4. When receiving, the interruption of the power supply to the projection unit 62 is canceled and the case image is output to the projection unit 62. Thereby, the projection image of the incident image is displayed on the palm or wall of the coping person by the projection unit 62. If no case image has been received, the case image is not output to the projection unit 62.

  Thereafter, the case information processing unit 610 checks the state of the projection stop switch 65. When the projection stop operation is detected, the power supply to the projection unit 62 is interrupted to stop the projection. If the projection stop operation is not detected, the process waits until a case image is received.

  Next, the operation of the device abnormality determination unit 611 will be described. FIG. 7 is a flowchart showing the operation of the device abnormality determination unit 611. The processes in steps S60 to S76 are repeatedly executed in a predetermined cycle shorter than 1 second which is the lower limit value of the test execution interval of the test communication.

  First, the device abnormality determination unit 611 checks whether the short-range communication I / F 60 has received a test signal from the mobile communication terminal 4 (S60). If received (YES in S60), a response signal addressed to mobile communication terminal 4 is generated and output to short-range communication I / F 60 (S61).

  Next, the test execution interval is extracted from the test signal (S62) and compared with the test execution interval in the storage unit 63 (S63). If they are different, it is determined that the test execution interval has changed (YES in S63), and the test execution set this time is subtracted from the currently set next test time, which is twice the previous test execution interval. The time obtained by adding the time obtained by doubling the interval is calculated as the next test time, and the next test time in the storage unit 63 is updated (S64). The reason for the double is that the portable communication terminal 4 and the projector 6 transmit test signals alternately.

  If the test signal has not been received (NO in S60), device abnormality determination unit 611 skips steps S61 to S64.

  If there is no change in the test execution interval (NO in S63), device abnormality determination unit 611 skips step S64.

  Next, the device abnormality determination unit 611 acquires the current time from the time measuring unit 64 and compares it with the test time in the storage unit 63 (S65). If the current time exceeds the test time, it is determined that the test time has arrived (YES in S65). Also, a test signal addressed to the mobile communication terminal 4 including the test execution interval is generated and output to the short-range communication I / F 60 (S66). The device abnormality determination unit 611 acquires the time at this time as the transmission time. Next, the test execution interval in the storage unit 63 is read out (S67), and the storage unit is stored at a new next test time obtained by adding the time obtained by doubling the test execution interval read out in step S67 to the test time used in step S65. The next test time 63 is updated (S68). The reason for the double is that the portable communication terminal 4 and the projector 6 transmit test signals alternately.

  After transmitting the test signal, the device abnormality determination unit 611 confirms whether the short-range communication I / F 60 has received the response signal from the mobile communication terminal 4 (S69) and the current time has passed the waiting time from the transmission time. The confirmation (S70) of whether timeout has occurred is repeated.

  When time-out occurs (YES in S70), it is determined that communication with the mobile communication terminal 4 is impossible, and the storage unit 63 stores a communication state identification code indicating communication failure (S71), and stores in advance in the storage unit 63. The projected warning pattern is instructed to the projection unit 62 (S72). The projection unit 62 turns on the light source with an instructed warning pattern (such as blinking) and notifies the cooperator that communication is impossible. By notifying using the projection unit 62, it is possible to reliably notify the coping staff in the wearing state as shown in FIG. In addition, no new costs are incurred for notification. When the response signal is received (YES in S69), the communication unit identification code indicating that communication is possible is stored in the storage unit 63, assuming that communication with the mobile communication terminal 4 is possible (S73).

  Next, the test execution interval is extracted from the response signal (S74) and compared with the test execution interval in the storage unit 63 (S75). If they are different, it is determined that the test execution interval has changed (YES in S75), and the test set this time is subtracted from the currently set next test time, which is twice the previous test execution interval. The time obtained by adding the time obtained by doubling the execution interval is calculated as the next test time, and the next test time in the storage unit 63 is updated (S76). The reason for the double is that the portable communication terminal 4 and the projector 6 transmit test signals alternately.

  If the test time has not yet arrived in the current cycle (NO in S65), device abnormality determination unit 611 skips steps S66 to S76.

  If there is no change in the test execution interval (NO in S75), device abnormality determination unit 611 skips step S76. When the above process is completed, the process returns to S60 to execute the next cycle.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this, A various deformation | transformation is possible.

  For example, the target position received from the case management device 2 can be the address of the case occurrence point. In this case, the latitude and longitude corresponding to the address are acquired from the map information generation device 7. In other words, the mobile communication terminal 4 transmits the address of the incident occurrence point to the map information generation device 7, and the map information generation device 7 searches the latitude and longitude of the address from the map data and returns it to the mobile communication terminal 4. . The target position setting unit for setting the target position may be provided outside the portable communication terminal 4 such as the case management apparatus 2. In addition, the case information processing unit 410 may be divided into means for generating a case image and means for setting a target position, or each may be provided outside the mobile communication terminal 4. In this case, the mobile communication terminal 4 may receive and use necessary information.

  The current position detection unit 412 may be provided outside the mobile communication terminal 4 such as the map information generation device 7. In this case, the portable communication terminal 4 receives a current position calculated by the external device by transmitting a GPS signal to the external device via the wide area communication network 3. In the case of this configuration, it is also possible to request the map information generation device 7 from the mobile communication terminal 4 to calculate the current position and the distance simultaneously by one communication. In this case, a target position setting unit may be provided in the map information generation device 7.

  Further, a sound output unit may be provided in the projector 6 to notify the coping staff by sound. This is effective when the projection unit 62 is housed in the casing except during projection.

  In this embodiment, the test execution interval is set to 60 seconds when there is no case information. However, there may be a mode in which the test is not executed when there is no case information. This is equivalent to the case where the test execution interval is infinite. Then, when there is case information, the test may be executed by setting the test execution interval to a predetermined interval, for example, 1 second when the distance becomes 0.3 km or less. When the distance becomes 0.3 km or less, the test is executed only once to determine whether or not communication is possible, and the power consumption associated with the execution of the test can be minimized. Further, the current position of the projector 6 may be used without detecting the current position of the mobile communication terminal 4. In this case, the projector 6 may be provided with a current position detection unit 412 to receive a GPS signal. There may be a mode in which the test is not executed until the distance becomes a predetermined distance (first distance = 2.5 km), and the test is executed when the distance becomes equal to or less than the first distance. Also in this case, when the distance is equal to or smaller than the predetermined distance, the test is executed more frequently than when the distance is longer than the predetermined distance. Further, the test is executed only once until the distance becomes a predetermined distance (first distance = 2.5 km), and the test is executed when the distance becomes equal to or less than the first distance, and further the second distance (300 m). A mode in which the test is executed when the following is satisfied is also possible. Also in this case, when the distance is equal to or less than the predetermined distance (first distance), the test is executed at a higher frequency than when the distance is longer than the predetermined distance (first distance). Here, the third and fourth distances may be set in advance, and the test may be executed each time the threshold value is lowered. In all of these aspects, it can be said that the test is executed with higher frequency as the distance between the current position and the target position is shorter.

  Also, in this embodiment, instead of increasing the frequency of test execution when the distance is less than or equal to the predetermined distance, the time required to reach the incident occurrence point is evaluated instead of the distance. It is also possible to increase the frequency of test execution when the time is less than the predetermined time, both of which are technically equivalent and included in the present invention. The required time is calculated based on the distance to the incident occurrence point and the average moving speed, and is adjusted further considering the traffic situation to the incident occurrence point. The calculation of the required time to the destination is well known in the vehicle navigation technology. In addition, the distances are sequentially received, and a plurality of test execution intervals are set corresponding to the distances so that the test execution frequency becomes higher as the distance is shorter, and the distances are sequentially switched according to the received distances. Good. Specifically, 2.5 km = 10 seconds, 2.0 km = 8 seconds, 1.5 km = 6 seconds, 1.0 km = 4 seconds, and the like. Here, the interval of the distance for changing the frequency and the change width of the execution interval are set in advance, and the execution interval is automatically set according to the received distance so that the execution frequency becomes higher as the distance is shorter. It may be.

  Further, the mobile communication terminal 4 and the projector 6 may be integrated. In this case, what is necessary is just to determine that the state in which the projection by the projector 6 cannot be normally performed is an apparatus abnormal state and perform self-diagnosis. Also in this aspect, a case where information cannot be normally input from the mobile communication terminal 4 to the projector 6 is also included in the device abnormal state. The determination of the device abnormality state may be performed by monitoring the remaining battery level and notifying that the device is abnormal when the remaining amount becomes a predetermined value or less. In the case of integration, the frequency of device abnormality determination may be increased by changing the execution interval and frequency of device abnormality monitoring.

  1 Projection system, 2 Case management device, 3 Wide area communication network, 4 Mobile communication terminal, 5 Near field communication network, 6 Projector.

Claims (4)

A battery-powered mobile communication device;
A battery-powered portable projector that projects information input from the portable communication terminal;
A current position detecting unit for detecting a current position of the mobile communication terminal;
A target position setting unit for setting the target position;
A device abnormality determination unit that determines whether or not the projector is in a device abnormality state in which the information cannot be projected;
With
Before Symbol equipment abnormality determination unit,
As the distance between the current position and the target position is shorter, it is determined whether or not the device is in an abnormal state with higher frequency. The device abnormality determination unit
When the distance between the current position and the target position is equal to or less than a first distance, it is determined whether or not the device is in an abnormal state more frequently than when the distance is longer than the first distance. Item 2. The projection system according to Item 1. The device abnormality determination unit
It is determined whether or not the device is in an abnormal state when the distance between the current position and the target position is at least the first distance or less and when the distance is less than the second distance shorter than the first distance. The projection system according to claim 1. The device abnormality determination unit
Transmitting means for transmitting a test signal from the portable communication terminal to the projector;
Receiving means for receiving a response signal from the projector with respect to the test signal;
Determining means for determining that the device is in an abnormal state when the response signal is not received;
The projection system according to any one of claims 1 to 3, wherein the projection system is provided.

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