JP2010049600A - Display terminal, target device, and manual browsing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display terminal for keeping the confidentiality of information about a target device, the target device, and a manual browsing system. <P>SOLUTION: The display terminal displays permission request data for prompting a predetermined input operation to the target device if its distance to the target device is less than a predetermined distance (S63). Once the predetermined input operation is performed, the target device sends a display permission signal permitting the display of manual display data to the display terminal. If the distance between the display terminal and the target device is kept less than the predetermined distance (S65:YES), if a signal for showing operation end is not received from the target device (S67:NO), and if the display permission signal is received (S69:YES), then the display terminal displays the manual display data of the target device (S71). The data of high confidentiality is prevented from being easily displayed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display terminal, a work target device, and a manual browsing system. In more detail, when the distance between the work target device and the display terminal is less than a predetermined value and a predetermined input is made to the work target device, the display data of the manual regarding the work target device is displayed. The present invention relates to a display terminal, a work target device, and a manual browsing system.

  Conventionally, when a problem occurs in office equipment such as a printer and repair or maintenance is required, an operator who performs repair or maintenance must bring a manual of the corresponding equipment and refer to it for repair or maintenance. Maintenance was being performed.

Here, the manual often includes confidential information regarding a device to be repaired or maintained (work target device). Therefore, normally, when a manual is stored in a display terminal or the like, a password is set, and display is possible only when the password is entered. This prevents information leakage of manuals that are confidential information. In addition, for example, by applying the technology of a terminal (for example, see Patent Document 1) that can receive highly confidential data when the distance to the target device becomes a short distance, the work target device and the display terminal When the distance becomes a short distance, manual display data can be received and displayed on the display terminal, thereby making it possible to prevent leakage of manual information that is confidential information.
JP 2001-333451 A

  However, in the above-described configuration, since the manual is displayed unconditionally when the display terminal is close to the work target device, even a person other than the worker can easily view the manual. In addition, the manual display data once received by the display terminal is in a state where it can be browsed continuously thereafter. For this reason, there is a problem that highly confidential information may easily leak outside.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a display terminal, a work target device, and a manual browsing system capable of maintaining the confidentiality of information related to the work target device. To do.

  In order to solve the above-described problem, a display terminal according to a first aspect of the present invention is a display terminal for displaying manual display data in a work target device, the display means for displaying the display data, and the display data In terminal storage means for storing, terminal receiving means for receiving a signal transmitted from the work target device, terminal distance determination means for determining a distance between the work target devices, and the terminal distance determination means, A first permission unit that permits reception of a signal by the terminal reception unit and waits for a signal transmitted from the work target device when it is determined that the distance to the work target device is less than a predetermined value; When the signal is received by the terminal receiving means in the state where reception of the signal is permitted by the first permission means, the signal is displayed on the display means on the display means. Display permission determining means for determining whether a display permission signal is a signal transmitted from the work target device when a predetermined input is made to the work target device to permit display, and When the display permission determining means determines that the received signal is a display permission signal, a second permission means for permitting display of the display data on the display means, and the display data at the second permission means. The first display control means for performing control to display the display data on the display means in a state where the display is permitted.

  In addition to the configuration of the invention according to claim 1, the display terminal of the invention according to claim 2 is in a state where the display of the display data on the display means is permitted by the second permission means. The terminal distance determining means includes a separation prohibiting means for prohibiting display of the display data on the display means when the distance to the work target device is determined to be a predetermined distance or more, The one display control means does not display the display data on the display means when the display is prohibited by the separation prohibiting means.

  Further, in the display terminal of the invention according to claim 3, in addition to the configuration of the invention of claim 1 or 2, display of the display data on the display means is permitted by the second permission means. In the state, when the signal is received by the terminal receiving means, the signal is an end notification signal that is a signal transmitted from the work target device when a predetermined work for the work target device is finished. End notification determining means for determining whether or not the end notification determining means prohibits display of the display data on the display means when it is determined that the received signal is the end notification signal. The first display control means does not display the display data on the display means when the display is prohibited by the notification prohibiting means.

  In addition to the configuration of the invention according to any one of claims 1 to 3, the display terminal of the invention according to claim 4 is in a state where reception of a signal is permitted by the first permission unit, or A display in which the signal is transmitted from the work target device when a signal is received by the terminal receiving unit in a state where the display of the display data on the display unit is permitted by the second permission unit. Display data determining means for determining whether the data is data, and terminal storage for storing the display data in the terminal storage means when the display data determining means determines that the received signal is the display data Control means.

  In addition to the configuration of the invention according to any one of claims 1 to 4, the display terminal of the invention according to claim 5 is permitted to display the display data on the display means by the first permission means. And when the signal is received by the terminal receiving means, the signal is display data transmitted from the work target device, and the display permission signal is transmitted to the work target device. In the permission request data determining means for determining whether or not the permission request data is display data to be displayed on the display means for prompting, and in the permission request data determining means, the received signal is the permission request data. A second display control unit that performs control to display the permission request data on the display unit when the determination is made.

  According to a sixth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the terminal storage means stores the display permission signal for the work target device. Permission request data, which is display data to be displayed on the display means for prompting transmission, is stored, and the display of the display data on the display means is permitted by the first permission means, Whether or not the signal is a display instruction signal that is a signal transmitted from the work target device to instruct the display of the permission request data on the display means when the signal is received by the terminal receiving means. Display instruction determining means for determining the display, and control for causing the display means to display the permission request data when the display instruction determining means determines that the received signal is the display instruction signal. And a second display control means.

  A display terminal according to a seventh aspect of the invention includes an RFID reader in addition to the configuration of the invention according to any one of the first to sixth aspects, and the terminal distance determination means is provided on the work target device. When the radio wave signal transmitted from the provided RFID tag can be received by the RFID reader, it is determined that the distance to the work target device is less than a predetermined value, and is transmitted from the RFID tag. When the radio wave signal cannot be received by the RFID reader, it is determined that the distance to the work target device is a predetermined distance or more.

  The display terminal according to an eighth aspect of the invention includes an RFID tag in addition to the configuration of the invention according to any one of the first to sixth aspects, and the terminal distance determination means is provided on the work target device. When the RFID tag can receive a radio signal transmitted from the RFID reader provided, it is determined that the distance to the work target device is less than a predetermined value, and is transmitted from the RFID reader. When a radio wave signal cannot be received by the RFID tag, it is determined that a distance from the work target device is a predetermined distance or more.

  In addition to the configuration of the invention according to any one of claims 1 to 8, the display terminal of the invention according to claim 9 includes terminal input means for inputting an instruction regarding the display data, and the first display control. When the display permission of the display data is input from the terminal input unit in a state where the display of the display data is permitted by the second permission unit, the display data is displayed as the display data. Control is performed to display on the display means.

  A work target device according to a tenth aspect of the present invention is a work target device, a device input means that is an input means for receiving input, and a display terminal capable of displaying manual display data of the work target device In the apparatus transmission means for transmitting a signal to the apparatus, the apparatus distance determination means for determining the distance between the display terminals, and the apparatus distance determination means, the distance between the display terminals is less than a predetermined value. When it is determined, when the device input determining means determines whether or not a predetermined input has been made to the device input means, and the device input determining means determines that the predetermined input has been made, the display terminal On the other hand, it comprises permission transmission control means for performing control for transmitting a display permission signal, which is a signal for permitting display of data, from the device transmission means.

  According to an eleventh aspect of the present invention, in addition to the configuration of the tenth aspect, the work target device includes an end detection unit that detects that a predetermined work on the work target device has ended, and the end detection. An end notification for transmitting an end notification signal, which is a signal for notifying the display terminal that the predetermined operation has been completed, from the device transmission unit when it is detected by the means that the predetermined operation has been completed. Transmission control means.

  In addition to the configuration of the invention according to claim 10 or 11, the work target device of the invention according to claim 12 includes the device storage means for storing manual display data, and the display of the display in the device distance determination means. Control for transmitting the display data from the device transmission means when it is determined that the distance to the terminal is less than a predetermined value, or when it is determined that a predetermined input is made by the device input determination means Display data transmission control means.

  According to a thirteenth aspect of the present invention, in addition to the configuration of the invention according to any one of the tenth to twelfth aspects of the invention, the distance to the display terminal is less than a predetermined distance in the device distance determination means. Control to transmit permission request data, which is display data to be displayed on the display terminal, to prompt the work target device to transmit the display permission signal to the work target device. Permission request transmission control means is provided.

  According to a fourteenth aspect of the present invention, in addition to the configuration of the invention according to any one of the tenth to twelfth aspects of the invention, the distance to the display terminal is less than a predetermined distance in the device distance determination means. A display instruction that is a signal instructing display of permission request data that is display data to be displayed on the display terminal in order to prompt the work target device to transmit the display permission signal. Display instruction transmission control means for performing control to transmit a signal from the device transmission means is provided.

  A work target device according to a fifteenth aspect of the invention includes an RFID reader in addition to the configuration of the invention according to any one of the tenth to fourteenth aspects, and the device distance determination means is provided on the display terminal. When the radio wave signal transmitted from the provided RFID tag can be received by the RFID reader, it is determined that the distance from the display terminal is less than a predetermined value, and the radio wave transmitted from the RFID tag When the signal cannot be received by the RFID reader, it is determined that the distance to the display terminal is a predetermined distance or more.

  According to a sixteenth aspect of the present invention, a work target device includes an RFID tag in addition to the configuration of the invention according to any one of the tenth to fourteenth aspects, and the device distance determination means is provided on the display terminal. When a radio wave signal transmitted from a provided RFID reader can be received by the RFID tag, it is determined that a distance from the display terminal is less than a predetermined value, and a radio wave transmitted from the RFID reader When the signal cannot be received by the RFID tag, it is determined that a distance from the display terminal is a predetermined distance or more.

  Further, in addition to the configuration of the invention according to any one of claims 10 to 16, the work target device according to the invention according to claim 17 has a configuration in which the device input determination means determines that a predetermined input has been made. A mode switching means for switching the work target device to a workable mode, which is a mode in which a predetermined work can be performed, is provided.

  A manual browsing system according to an eighteenth aspect of the present invention is a manual browsing system that includes a work target device and a display terminal that displays display data of a manual of the work target device. Display means for displaying display data, terminal storage means for storing the display data, terminal receiving means for receiving a signal transmitted from the work target device, and a terminal for determining a distance between the work target devices When the distance determining unit and the terminal distance determining unit determine that the distance between the work target device is less than a predetermined value, the terminal receiving unit is allowed to receive a signal, and the work target device A first permission unit that waits for a signal to be transmitted, and a signal received by the terminal reception unit in a state where reception of the signal is permitted by the first permission unit. The signal is a signal transmitted from the work target device when a predetermined input is made to the work target device in order to allow display data to be displayed on the display means. A display permission determining means for determining whether or not the display permission signal is a display permission signal; and when the display permission determining means determines that the received signal is a display permission signal, the display data is displayed on the display means. And a first display control means for performing control to display the display data on the display means in a state where the display of the display data is permitted by the second permission means, The work target device transmits a signal to a device input unit that is an input unit for receiving an input and a display terminal capable of displaying display data of the manual of the work target device. When the distance between the display terminal and the device distance determination means that determines the distance between the device transmission means, the device distance determination means, and the device distance determination means is determined to be less than a predetermined value. A device input determining unit that determines whether or not a predetermined input has been made to the device input unit; and when the device input determining unit determines that a predetermined input has been made, Permission transmission control means for performing control for transmitting a display permission signal, which is a signal for permitting display, from the device transmission means.

  In the display terminal according to the first aspect of the present invention, when the distance between the work target device and the display terminal becomes less than a predetermined value, the display terminal enters a reception standby state for a signal transmitted from the work target device. When the display permission signal transmitted from the work target device is received in this state, display of the display data on the display unit is permitted and the display data is displayed on the display unit. In this way, the two-stage conditions for displaying the display data on the display means are set, and when both are cleared, the display data display is permitted. This makes it possible to control so that highly confidential display data (manual of the work target device) is not easily displayed from the display terminal.

  The manual related to the work target device needs to be locked so as not to be displayed on the display terminal except when the worker performs work (maintenance, repair, etc.) on the work target device. Here, the display data of the manual is displayed only when the work target device and the display terminal are close to each other and the display terminal receives a predetermined signal (display permission signal) from the work target device. To display. As a result, it is possible to easily prevent the display data of the manual from being displayed by the display means, and the confidentiality of the manual can be maintained.

  Further, in the display terminal of the invention according to claim 2, in addition to the effect of the invention of claim 1, the two-stage condition for displaying the display data on the display means is cleared, and display of the display data is permitted. Even when the display terminal is separated from the work target device, display of display data is prohibited. Thereby, when the display terminal is in a state of being separated from the work target device, it is possible to prevent the display means from displaying manual display data with high confidentiality. This makes it possible to maintain the confidentiality of the manual.

  In the display terminal of the invention according to claim 3, it is not necessary to display the display data on the display means after completion of the work (maintenance, repair, etc.) on the work target device. The display can be prohibited. Thereby, in addition to the effect of the invention described in claim 1 or 2, it is possible to maintain the confidentiality of the manual. For example, when the work on the work target device is finished and the display of manual display data is no longer required on the display terminal, the display can be prohibited. This makes it possible to maintain the confidentiality of the manual.

  Moreover, in the display terminal of the invention which concerns on Claim 4, display data is received from work object apparatus, and this is displayed on a display means. This eliminates the need for the display terminal to store display data in the terminal storage means in advance, so that in addition to the effect of the invention according to any one of claims 1 to 3, the storage capacity of the terminal storage means is reduced. Therefore, the display terminal can be reduced in size and price. Further, since the manual display data is stored in the display terminal only when necessary, it is possible to maintain the confidentiality of the manual.

  In the display terminal of the invention according to claim 5, when the permission request data is received, the permission request data is displayed on the display means. Here, the permission request data is data indicating an input method necessary for transmitting a display permission signal to the work target device. Accordingly, in addition to the effect of the invention according to any one of claims 1 to 4, it is possible to control the apparatus to be operated so that the display permission signal is not easily transmitted to the work target device. Can be held strongly.

  In the display terminal of the invention according to claim 6, when the display instruction signal is received by the first permission means, the display terminal displays the permission request data stored in the terminal storage means on the display means. Here, the permission request data is data indicating an input method necessary for transmitting a display permission signal to the work target device. Accordingly, in addition to the effect of the invention according to any one of claims 1 to 4, it is possible to control the apparatus to be operated so that the display permission signal is not easily transmitted to the work target device. Can be held even stronger.

  In the display terminal of the invention according to claim 7, the work target device includes an RFID reader. Then, the distance to the work target device is determined based on whether or not the response signal returned from the RFID tag can be received with respect to the radio wave signal transmitted from the RFID reader. Accordingly, in addition to the effect of the invention according to any one of claims 1 to 6, it is possible to easily determine the distance to the work target device at a low cost, thereby suppressing the cost of the display terminal. It becomes possible.

  In the display terminal of the invention according to claim 8, the work target device includes an RFID tag. Then, the distance to the work target device is determined based on whether the radio wave transmitted from the RFID reader can be received by the RFID tag. Accordingly, in addition to the effect of the invention according to any one of claims 1 to 6, it is possible to easily determine the distance to the work target device at a low cost, thereby suppressing the cost of the display terminal. It becomes possible.

  Further, in the display terminal of the invention according to claim 9, in addition to the effect of the invention according to any one of claims 1 to 8, the display terminal displays display data only when a display instruction is input by a viewer. Is displayed on the display means. Accordingly, it is possible to prevent the display data from being inadvertently displayed and viewed by others.

  In the work target device according to the tenth aspect, when the distance from the display terminal is less than a predetermined value, the device waits for a predetermined input. When a predetermined input is made in this state, a signal for permitting data display (display permission signal) is transmitted to the display terminal. The display terminal that has received this signal can display the display data of the manual of the work target device on the display means.

  Since the manual related to the work target device is highly confidential, for example, a mechanism is required to lock it so that it is not displayed on the display terminal except during work (maintenance, repair, etc.) on the work target device by the worker. Here, as described above, only when the distance between the display terminal and the work target device is less than a predetermined value and when a predetermined input is made to the work target device, the manual display on the display terminal is performed. Display data. As a result, it is possible to easily prevent the display data of the manual from being displayed from the display terminal, and it is possible to maintain the confidentiality of the manual.

  In the work target device according to the eleventh aspect, when the work (maintenance, repair, etc.) on the work target device is completed, it is not necessary to display the manual display data on the display terminal. In such a case, an end notification signal for notifying that the work has been completed is transmitted to the display terminal, and the display terminal erases the display data of the manual being displayed. Thus, in addition to the effect of the invention described in claim 10, it is possible to prohibit the display of manual display data, and it is possible to maintain the confidentiality of the manual.

  In the work target device according to the twelfth aspect, manual display data to be displayed on the display terminal is stored in the work target device. Only when it is desired to display the display data on the display terminal, the display data is transmitted to the display terminal and displayed. Thus, in addition to the effect of the invention according to claim 10 or 11, since the display terminal does not need to always store display data, the storage capacity necessary for the display terminal can be suppressed. In addition, the confidentiality of the manual can be maintained.

  In the work target device according to the thirteenth aspect, display data (permission request data) relating to a predetermined input method for the device input means is transmitted to the display terminal for display. When a predetermined input is made based on the permission request data, the work target device transmits a display permission signal. Accordingly, in addition to the effect of the invention according to any one of claims 10 to 12, it is possible to prevent the display permission signal from being easily transmitted from the work target device, and thus it is easier to perform the manual operation than the display terminal. It is possible to prevent display data from being displayed and maintain the confidentiality of the manual.

  In the work target device according to the fourteenth aspect of the present invention, an instruction signal (display instruction signal) for causing the display terminal to display display data (permission request data) relating to a predetermined input method for the device input means is transmitted and displayed. Display on the terminal. When a predetermined input is made based on the permission request data displayed on the display terminal, the work target device transmits a display permission signal. Accordingly, in addition to the effect of the invention according to any one of claims 10 to 12, it is possible to prevent the display permission signal from being easily transmitted from the work target device, and thus it is easier to perform the manual operation than the display terminal. It is possible to prevent display data from being displayed, and to maintain the confidentiality of the manual more strongly.

  In the work target device according to the fifteenth aspect of the present invention, the display terminal includes an RFID reader. Then, the distance to the display terminal is determined based on whether or not a response signal returned from the RFID tag can be received with respect to the radio wave signal transmitted from the RFID reader. Accordingly, in addition to the effect of the invention according to any one of claims 10 to 14, it is possible to easily determine the distance to the display terminal at a low cost, thereby suppressing the cost of the work target device. It becomes possible.

  In the work target device according to the sixteenth aspect of the present invention, the display terminal includes an RFID tag. Then, the distance from the display terminal is determined based on whether or not the radio wave transmitted from the RFID reader can be received by the RFID tag. Accordingly, in addition to the effect of the invention according to any one of claims 10 to 14, it is possible to easily determine the distance to the display terminal at a low cost, thereby suppressing the cost of the work target device. It becomes possible.

  In addition, in the work target device according to the seventeenth aspect of the present invention, when a predetermined input is made by the device input determining means, it is assumed that work (maintenance, repair, etc.) on the work target device is started by the worker. . Therefore, in such a case, the work target device is set in a workable state. Thereby, in addition to the effect of the invention according to any one of claims 10 to 16, it is possible to facilitate work by a viewer of the display terminal.

  In the manual browsing system according to the eighteenth aspect of the invention, it is possible to control so that highly confidential display data (manual of the work target device) is not easily displayed from the display terminal.

<First embodiment>

  Hereinafter, a display terminal, a work target device, and a manual browsing system according to a first embodiment of the present invention will be described with reference to the drawings. These drawings are used for explaining the technical features that can be adopted by the present invention, and the configuration of the apparatus described, the flowcharts of various processes, etc., unless otherwise specified. It is not intended to be limited to that, but merely an illustrative example.

  First, an overview of the manual browsing system 100 will be described with reference to FIG. FIG. 1 is a schematic diagram showing an overview of a manual browsing system 100. The manual browsing system 100 includes a work target device 11 and a display terminal 21.

  In the system configuration illustrated in FIG. 1, the work target device 11 indicates a device that requires work such as periodic maintenance or repair in the event of a failure, such as an office device (copy machine, printer). In this system, the work target device 11 is subjected to work such as maintenance and repair by the worker 1. The work target device 11 is prepared in advance with a manual including the internal structure of the device and operation procedures. The worker 1 performs work with reference to this manual.

  The display terminal 21 is a terminal capable of displaying display data on the display unit 22. In the manual browsing system 100, the display terminal 21 causes the display unit 22 to display manual display data. The displayed display data of the manual is browsed by the worker 1 during work (maintenance, repair, etc.) on the work target device 11. As a result, the worker 1 can work on the work target device 11 while referring to the manual.

  Here, the manual includes secret information regarding the work target device 11. Therefore, it is necessary to prevent the manual from being displayed on the display unit 22 of the display terminal 21 unless necessary. In the present embodiment, when the worker 1 approaches the work target device 11 and directly performs work (state 2 in FIG. 1), manual display data is displayed on the display unit 22 of the display terminal 21. When the work is not directly performed on the work target device 11 (state 3 in FIG. 1), the manual is not displayed on the display unit 22 of the display terminal 21. This prevents the display terminal 21 from being stolen and the manual viewed by a third party, or the manual is not displayed on the display unit 22 except when the worker 1 is working, and the confidentiality of the manual is prevented. Holding.

  Next, the electrical configuration of the display terminal 21 will be described with reference to FIG. FIG. 2 is a schematic diagram showing an electrical configuration of the display terminal 21.

  As shown in FIG. 2, the display terminal 21 includes a CPU 201 that performs overall control. The display terminal 21 includes a ROM 202 in which a program for driving the CPU 201 is stored. Further, a RAM 203 having a flag storage area 2031 that is an area for storing flags and the like and an area for storing temporary data generated when the CPU 201 is driven is provided. An EEPROM 204 that stores setting parameters, terminal IDs, and the like is also provided. The CPU 201 and the ROM 202, RAM 203, and EEPROM 204 are electrically connected via a bus so that data can be exchanged with the CPU 201.

  The display terminal 21 includes a wireless communication module 205 for performing wireless communication with the work target device 11. The wireless communication module 205 is connected to an antenna not shown. The module is capable of demodulating an electrical signal induced in the antenna and transmitting a modulation signal to the antenna to transmit a signal radio wave. The wireless communication module 205 is electrically connected to the CPU 201 so that the signal transmitted from the CPU 201 can be modulated and transmitted, and the demodulated signal can be transferred to the CPU 201.

  The wireless communication system in the wireless communication module 205 is not particularly limited, and various conventionally known wireless communication systems can be used.

  The display terminal 21 includes an RFID tag 206 that is used to determine the distance to the work target device 11. The CPU 201 determines whether or not the RFID tag 206 can receive the signal radio wave transmitted from the RFID reader 106 (see FIG. 3) provided in the work target device 11, whereby the display terminal 21 and the work target device 11. It is determined whether or not the distance between is less than a predetermined distance (hereinafter referred to as “viewable distance”) (details will be described later). Then, the signal received by the RFID tag 206 can be transferred to the CPU 201, and when the signal is transmitted from the CPU 201 to the RFID tag 206, signal radio waves can be transmitted from the RFID tag 206. The RFID tag 206 is electrically connected to the CPU 201 as possible.

  It should be noted that the intensity of the signal radio wave from the RFID tag 206 arriving at the RFID reader 106 can be received by the RFID reader 106 in a state where the display terminal 21 and the work target device 11 are separated by a viewable distance. The transmission radio field intensity of the RFID tag 206 is adjusted so that As a result, the CPU 101 of the work target device 11 determines whether or not the signal radio wave from the RFID tag 206 can be received by the RFID reader 106, so that the distance from the display terminal 21 is less than the viewable distance. It is possible to determine whether or not (details will be described later).

  In addition, the display terminal 21 receives an instruction from the operator 1 to the display terminal 21 and converts the input content into an electric signal that can be recognized by the CPU 201 when input is made to the input unit 207. And an input interface 208. The input unit 207 is electrically connected to the input interface 208 and the input interface 208 is electrically connected to the CPU 201 so that the CPU 201 can determine the input content made to the input unit 207. .

  The display terminal 21 includes a memory card 210 and a memory card interface (I / F) 209 provided so that the CPU 201 can access a storage area of the memory card 210. The memory card 210 is electrically connected to the memory card interface 209 so that the CPU 201 can access the storage area of the memory card 210, and the memory card I / F 209 is electrically connected to the CPU 201. Connected.

  The memory card 210 is provided with a manual storage area 2101 for storing manual display data to be displayed on the display unit 22. The memory card stores permission request data (details will be described later) displayed on the display unit 22.

  The display terminal 21 includes a display unit 22 for displaying display data such as a manual and a display control unit 212 for controlling the display unit 22 to display the display data on the display unit 22. Yes. The display unit 22 is electrically connected to the display control unit 212 so that the display data transmitted from the CPU 201 can be displayed on the display unit 22, and the display control unit 212 is electrically connected to the CPU 201. Connected.

  Further, the display terminal 21 supplies a battery 213 for supplying power necessary for driving the display terminal 21, and converts the power supplied from the battery 213 into power capable of driving the above-described devices. And a power supply control unit 214. The display terminal 21 includes a battery connection sensor 215 for detecting whether or not the battery 213 is connected to the display terminal 21. The battery connection sensor 215 detects the voltage of the portion to which power from the battery 213 is supplied. The CPU 201 is electrically connected so that the detection result can be notified to the CPU 201. The CPU 201 determines that the battery 213 has been removed when the voltage notified from the battery connection sensor 215 becomes less than a predetermined value.

  Note that power for driving the CPU 201 is supplied from the battery 213. Therefore, when the battery 213 is removed, the power supplied to the CPU 201 is also stopped. However, the capacity component provided in the power supply control unit 214 or the like allows the CPU 201 to detect a notification from the battery connection sensor 215 before the supplied power is stopped and the driving is stopped. Thereby, when the battery 213 is removed, the CPU 201 can perform post-processing (such as setting parameter backup) before stopping the driving.

  Next, the electrical configuration of the work target device 11 will be described with reference to FIG. FIG. 3 is a schematic diagram illustrating an electrical configuration of the work target device 11.

  As illustrated in FIG. 3, the work target device 11 includes a CPU 101 that controls the entire device. The CPU 101 has a power supply voltage monitoring function. When a decrease in power supply voltage is detected, it is determined that the power supply has been cut off, and post-processing (such as setting parameter backup) can be performed before the drive is stopped. The work target device 11 includes a ROM 102 in which a program for driving the CPU 101 is stored. In addition, a RAM 103 having a flag storage area 1031 which is an area for storing flags and the like, and an area for storing temporary data generated when the CPU 101 is driven is provided. An EEPROM 104 for storing setting parameters and the like is also provided. The CPU 101 and the ROM 102, the RAM 103, and the EEPROM 104 are electrically connected via a bus so that data can be exchanged with the CPU 101.

  In addition, the work target device 11 includes a wireless communication module 105 for performing wireless communication with the display terminal 21. The wireless communication module 105 is connected to an antenna not shown. The module is capable of demodulating an electrical signal induced in the antenna and transmitting a modulation signal to the antenna to transmit a signal radio wave. The wireless communication module 105 is electrically connected to the CPU 101 so that the signal transmitted from the CPU 101 can be modulated and transmitted, and the demodulated signal can be transferred to the CPU 101.

  The wireless communication system in the wireless communication module 105 is not particularly limited, and various conventionally known wireless communication systems can be used.

  The work target device 11 includes an RFID reader 106 for determining the distance from the display terminal 21. The CPU 101 transmits signal radio waves to the RFID tag 206 (see FIG. 2) provided on the display terminal 21 via the RFID reader 106. Then, it is determined whether or not a response signal transmitted from the RFID tag 206 can be received. Thereby, it is determined whether or not the distance between the work target device 11 and the display terminal 21 is less than the viewable distance (details will be described later). Then, the signal received by the RFID reader 106 can be transferred to the CPU 101, and when the signal is transmitted from the CPU 101 to the RFID reader 106, signal radio waves can be transmitted from the RFID reader 106. As possible, the RFID reader 106 is electrically connected to the CPU 101.

  It should be noted that the intensity of the signal radio wave from the RFID reader 106 arriving at the RFID tag 206 can be received by the RFID tag 206 in a state where the display terminal 21 and the work target device 11 are separated by a viewable distance. The transmission radio wave intensity of the RFID reader 106 is adjusted so that As a result, the CPU 201 of the display terminal 21 determines whether or not the signal radio wave from the RFID reader 106 has been received, thereby determining whether or not the distance to the work target device 11 is less than the viewable distance. (Details will be described later).

  Further, the work target device 11 converts an input content into an electric signal that can be recognized by the CPU 101 when an input is made to the input unit 107 that receives an instruction from the worker 1 to the work target device 11 and the input unit 107. And an input interface 108. The input unit 107 is electrically connected to the input interface 108 and the input interface 108 is electrically connected to the CPU 101 so that the CPU 101 can determine the input content made to the input unit 107. .

  In addition, the work target device 11 includes a hard disk 109 for storing manual display data, permission request data, a predetermined password (details will be described later), and the like to be displayed on the display unit 22 of the display terminal 21. The hard disk 109 is electrically connected to the CPU 101 so that the CPU 101 can access the storage area of the hard disk 109.

  In addition, the work target device 11 includes a detection sensor 110 that detects the open / closed state of the front door. The detection sensor 110 and the CPU 101 are electrically connected so that the CPU 101 can recognize an output signal from the detection sensor 110. In the present embodiment, it is assumed that when the worker 1 performs work on the work target device 11, the door on the front surface of the work target device 11 is opened. Therefore, when the front door is open, the CPU 101 determines that some work is being performed on the work target device 11 by the worker 1. Further, the CPU 101 determines that the work by the worker 1 for the work target device 11 is completed when the front door is changed from the open state to the closed state (details will be described later).

  Next, an outline of data stored in the manual storage area 2101 provided in the memory card 210 will be described with reference to FIG. FIG. 4 is a schematic diagram showing the manual storage area 2101.

  In the manual storage area 2101, manual display data to be displayed on the display unit 22 is stored in association with the device ID. For example, “111.pdf” is stored as the manual display data corresponding to the device ID “A”, and “222.pdf” is stored as the manual display data corresponding to the device ID “B”. “333.pdf” is stored as manual display data corresponding to the device ID “C”.

  When the display terminal 21 approaches the work target device 11 while being held by the worker 1, the display terminal 21 acquires the device ID of the work target device 11 in the close state. Then, the manual storage area 2101 is referred to, and manual display data corresponding to the acquired device ID is selected. As a result, a manual necessary for the worker 1 to perform the work (that is, a manual related to the work target device 11 in a state close to the worker 1) is automatically selected and displayed on the display unit 22. It can be displayed. Further, since manual display data not related to the work target device 11 in the close state is not selected, it is possible to prevent the display unit 22 from inadvertently displaying manual display data unnecessary for the operator 1. It becomes. This makes it possible to maintain the confidentiality of the manual. Details of the above-described processing will be described with reference to flowcharts shown in FIGS.

  Next, processing executed by the CPU 201 of the display terminal 21 will be described with reference to FIGS. FIG. 5 is a flowchart of the terminal distance determination task. FIG. 6 is a flowchart of the terminal reception task. FIG. 7 is a flowchart of the terminal input monitoring task. FIG. 8 is a flowchart of the terminal main task. FIG. 9 is a subroutine flowchart of the data display process.

  For the terminal distance determination task, the terminal reception task, the terminal input monitoring task, and the terminal main task, an execution cycle and a priority order are set in advance. Then, the CPU 201 executes the process of the task whose execution cycle has arrived at any time. In addition, when the task 201 is being executed by the CPU 201 and the execution cycle of another task has arrived, the CPU 201 preferentially selects the task processing with the higher priority set. And run. Therefore, for example, when the execution cycle of a task with a high priority arrives during the execution of processing of a task with a low priority, the CPU 201 interrupts the processing of a task with a low priority during the execution. Then, priority is given to the processing of a task with a high priority. Then, after the processing of the task with the higher priority is completed, the CPU 201 resumes the processing of the task with the lower priority from the point of interruption.

  The terminal distance determination task, the terminal reception task, the terminal input monitoring task, and the terminal main task are processed when the battery 213 is connected to the display terminal 21, power is supplied to the CPU 201, and driving is started. Be started.

  A flag used during processing of the CPU 201 will be described. As the flag, a first permission flag, a second permission flag, a first reception flag, and a second reception flag are used. These flags are stored in the flag storage area 2031 of the RAM 203.

  Among these flags, the first permission flag is used to indicate a distance state between the display terminal 21 and the work target device 11. In the terminal distance determination task, when the CPU 201 determines that the distance between the display terminal 21 and the work target device 11 is less than the viewable distance, “1” is stored, which is equal to or greater than the viewable distance. If it is determined that there is, “0” is stored.

  The second permission flag is used to indicate whether or not to permit display data to be displayed on the display unit 22 when the operator 1 performs an input operation on the input unit 207. In the data display process of the terminal main task, “1” is stored when the CPU 201 permits display of display data on the display unit 22, and “0” is stored when display is prohibited.

  The first reception flag is used to indicate whether or not the display terminal 21 has received a display permission signal (details will be described later) transmitted from the work target device 11. In the terminal reception task, “1” is stored when it is determined that the CPU 201 has received the display permission signal, and “0” is stored when it is determined that it has not been received.

  The second reception flag is used to indicate whether or not the display terminal 21 has received an end notification signal (details will be described later) from the work target device 11. In the terminal reception task, “1” is stored when it is determined that the CPU 201 has received the end notification signal, and “0” is stored when it is determined that it has not been received.

  Hereinafter, when “1” is stored in each of the above-described flags, it is referred to as “the flag is turned on”, and when “0” is stored, it is referred to as “the flag is turned off”.

  The above-described flags stored in the flag storage area 2031 are turned off and initialized when the battery 213 is connected to the display terminal 21 and power is supplied to the CPU 201 to start driving.

  The processing of the terminal distance determination task will be described with reference to the flowchart shown in FIG. In the terminal distance determination task, the CPU 201 continuously monitors whether the distance between the display terminal 21 and the work target device 11 is less than the viewable distance. As shown in FIG. 5, in the terminal distance determination task, the CPU 201 first monitors the battery voltage notified from the battery connection sensor 215 (S21). Here, when the battery voltage notified from the battery connection sensor 215 is less than the predetermined value, the CPU 201 determines that the battery 213 has been removed (S21: YES). In this case, since the process cannot be continued, post-processing (backup of setting parameters and the like to the EEPROM 204) is performed in order to end the ongoing process. Then, the terminal distance determination task process is terminated.

  When it is determined that the battery voltage notified from the battery connection sensor 215 is equal to or higher than the predetermined value and the battery 213 is connected (S21: NO), the CPU 201 receives the signal radio wave via the RFID tag 206. (S22). The work target device 11 continuously transmits a signal radio wave including the device ID to the surroundings continuously from the RFID reader 106 (see FIG. 3) (S123, see FIG. 11, described later). Therefore, in this state, when the worker 1 who owns the display terminal 21 approaches the work target device 11, the signal radio wave transmitted from the RFID reader 106 of the work target device 11 arrives at the RFID tag 206 of the display terminal 21. To do. The RFID tag 206 receives the signal radio wave and demodulates it.

  The CPU 201 receives signal radio waves via the RFID tag 206. And when it is judged that the signal which demodulated the received signal radio wave is a signal containing apparatus ID transmitted from the work object apparatus 11 (S23: YES), CPU201 is the work object apparatus 11 and the display terminal 21. It is determined that the distance between them is less than the viewable distance. The CPU 201 temporarily stores the device ID included in the received demodulated signal in the RAM 203. Next, the CPU 201 transmits a response signal via the RFID tag 206 (S24). Next, the CPU 201 turns on the first permission flag stored in the flag storage area 2031 to indicate that the distance between the display terminal 21 and the work target device 11 is less than the viewable distance (S25). . Then, the CPU 201 returns to the process of S21, and continuously checks the connection state of the battery 213 and monitors the distance between the display terminal 21 and the work target device 11.

  On the other hand, when the demodulated signal is not received from the RFID tag 206 via the RFID tag 206 (S23: NO), the CPU 201 determines that the distance to the work target device 11 is greater than or equal to the viewable distance. To do. In this case, the CPU 201 turns off the first permission flag stored in the flag storage area 2031 (S27). Then, the CPU 201 returns to the process of S21, and continuously checks the connection state of the battery 213 and monitors the distance between the display terminal 21 and the work target device 11.

  As described above, the display terminal 21 of the present invention uses the RFID tag 206 in order to determine the distance to the work target device 11. Then, when the signal radio wave transmitted from the RFID reader 106 included in the work target device 11 can be received by the RFID tag 206, it is determined that the distance to the work target device 11 is less than the viewable distance. Accordingly, the display terminal 21 can grasp the distance to the work target device 11 using the RFID tag 206 without providing an expensive dedicated device for distance measurement. Thereby, the cost of the display terminal 21 can be suppressed.

  The processing of the terminal reception task will be described with reference to the flowchart shown in FIG. In the terminal reception task, the CPU 201 determines the signal radio wave received via the wireless communication module 205. The display terminal 21 demodulates and receives the signal radio wave transmitted from the wireless communication module 105 of the work target device 11 via the wireless communication module 205. The CPU 201 determines the received signal and controls the corresponding flag.

  As shown in FIG. 6, in the terminal reception task, the CPU 201 monitors the battery voltage notified from the battery connection sensor 215 (S41). Here, when the battery voltage notified from the battery connection sensor 215 is less than the predetermined value, the CPU 201 determines that the battery 213 has been removed (S41: YES). In this case, since the process cannot be continued, post-processing (backup of setting parameters and the like to the EEPROM 204) is performed in order to end the ongoing process. Then, the terminal reception task process is terminated.

  When it is determined that the battery voltage notified from the battery connection sensor 215 is equal to or higher than the predetermined value and the battery 213 is connected (S41: NO), the CPU 201 transmits the signal radio wave via the wireless communication module 205. Receive (S42). Next, the CPU 201 performs flag control according to the demodulated signal obtained by demodulating the received signal radio wave. It is determined that the received signal is a display permission signal that is a signal (S109, see FIG. 13, which will be described later) transmitted from the work target device 11 to allow the display unit 22 to display manual display data. In the case (S43: YES), the CPU 201 turns on the first reception flag stored in the flag storage area 2031 (S45). Then, the CPU 201 proceeds to the process of S49.

  On the other hand, when the CPU 201 has not received the display permission signal via the wireless communication module 205 (S43: NO), the CPU 201 turns OFF the first reception flag stored in the flag storage area 2031 (S47). Then, the CPU 201 proceeds to the process of S49.

  In the processing of S49, the CPU 201 transmits a signal transmitted from the work target device 11 when the received signal terminates the display of the manual display data being displayed on the display unit 22 (see S117, see FIG. 13). If it is determined that the signal is an end notification signal (described later) (S49: YES), the CPU 201 turns on the second reception flag stored in the flag storage area 2031 (S51), and the CPU 201 returns to the process of S41. Then, the connection state of the battery 213 is continuously checked and reception of the signal radio wave transmitted from the work target device 11 is monitored.

  On the other hand, when the CPU 201 has not received the end notification signal from the wireless communication module 205 (S49: NO), the CPU 201 turns OFF the second reception flag stored in the flag storage area 2031 (S53). Then, the CPU 201 returns to the process of S41, and continuously confirms the connection state of the battery 213 and monitors the reception of the signal radio wave transmitted from the work target device 11.

  The terminal input monitoring task process will be described with reference to the flowchart of FIG. In the terminal input monitoring task, the CPU 201 monitors the battery voltage notified from the battery connection sensor 215 (S30). Here, if the battery voltage notified from the battery connection sensor 215 is less than the predetermined value, the CPU 201 determines that the battery 213 has been removed (S30: YES). In this case, since the process cannot be continued, post-processing (backup of setting parameters and the like to the EEPROM 204) is performed in order to end the ongoing process. Then, the terminal input monitoring task process is terminated.

  When it is determined that the battery voltage notified from the battery connection sensor 215 is equal to or higher than a predetermined value and the battery 213 is connected (S30: NO), the CPU 201 receives a signal input via the input unit 207. Is monitored (S31). When it is detected that the operator 1 inputs an instruction to display the manual display data via the input unit 207 (S31: YES), the CPU 201 displays the manual display data on the display unit 22. Is determined to be in a permitted state. When the display is permitted here, the second permission flag is turned ON in the data display process (S71, see FIG. 9, described later). Therefore, when the second permission flag is ON (S33: YES), the CPU 201 determines that display of manual display data on the display unit 22 is permitted. The CPU 201 receives manual display data corresponding to the device ID received in S23 (see FIG. 5) of the terminal distance determination task and temporarily stored in the RAM 203 from the manual storage area 2101 (see FIG. 4) of the memory card 210. Explore. Then, the display control unit 212 is controlled to display the searched manual display data on the display unit 22 (S35). Then, the CPU 201 returns to the process of S30, and continuously checks the connection state of the battery 213 and monitors the input operation via the input unit 207.

  On the other hand, if the CPU 201 determines that no input operation has been performed by the operator 1 via the input unit 207 (S31: NO), the CPU 201 returns to the process of S30, and continuously confirms the connection state of the battery 213. The input operation via the input unit 207 is monitored. Further, even when the operator 1 performs an input operation via the input unit 207 (S31: YES), the display of the manual display data on the display unit 22 is prohibited and the second permission is given. When the flag is OFF (S33: NO), the process returns to S30 without performing the display process on the display unit 22. Then, the connection state of the battery 213 is continuously checked and the input operation via the input unit 207 is monitored.

  The processing of the terminal main task will be described with reference to the flowcharts shown in FIGS. As shown in FIG. 8, in the terminal main task, the CPU 201 monitors the battery voltage notified from the battery connection sensor 215 (S11). Here, when the battery voltage notified from the battery connection sensor 215 is less than the predetermined value, the CPU 201 determines that the battery 213 has been removed (S11: YES). In this case, since the process cannot be continued, post-processing (backup of setting parameters and the like to the EEPROM 204) is performed in order to end the ongoing process. Then, the terminal main task process ends.

  When it is determined that the battery voltage notified from the battery connection sensor 215 is equal to or higher than the predetermined value and the battery 213 is connected (S11: NO), the CPU 201 determines whether the display terminal 21 and the work target device 11 are connected. Determine if the distance is less than the viewable distance. If the distance between the display terminal 21 and the work target device 11 is less than the viewable distance, the first permission flag is turned ON in the terminal distance determination task (see FIG. 5) (S25, see FIG. 5). Therefore, the CPU 201 confirms the first permission flag (S13). If the first permission flag is ON (S13: YES), a data display process (S15, see FIG. 9, described later) is performed in order to display the manual display data on the display unit 22. Execute. On the other hand, when the first permission flag is OFF (S13: NO), the CPU 201 does not need to display manual display data on the display unit 22, and thus returns to S11 and repeats the above-described processing.

  The data display process will be described with reference to FIG. As shown in FIG. 9, in the data display process, the CPU 201 reads the device ID received in S22 (see FIG. 5) of the terminal distance determination task and temporarily stored in the RAM 203 (S61). Next, the CPU 201 controls the display control unit 212 to display the permission request data stored in the memory card 210 on the display unit 22 (S63). The permission request data is display data that indicates an input operation that the worker 1 should perform on the work target device 11 in order to cause the work target device 11 to transmit a display permission signal.

  With reference to FIG. 10, an example of the permission request data in the state displayed on the display unit 22 will be described. FIG. 10 shows an example of permission request data in a state displayed on the display unit 22. In the example shown in FIG. 10, an instruction “Please enter the password with the numeric keypad after opening the drawer in the center” and the work target device 11 with the front door opened are shown. By displaying the permission request data on the display unit 22 in this way, the worker 1 is prompted to perform a predetermined input operation on the work target device 11. In the work target device 11, when a predetermined input operation (opening the front door, inputting a password to the input unit 107) based on the permission request data displayed on the display unit 22 by the worker 1 is performed, the display is performed. A display permission signal, which is a signal for permitting display of manual display data, is transmitted to the terminal 21 (S109, see FIG. 13, described later).

  Next, the CPU 201 has a distance between the display terminal 21 and the work target device 11 that is less than the viewable distance, has not received an end notification signal from the work target device 11, and has received a display permission signal from the work target device 11. In this case, the display data of the manual can be displayed from the display unit 22. Here, when the distance between the display terminal 21 and the work target device 11 is less than the viewable distance, the first permission flag is set to ON (see S25, FIG. 5). When the end notification signal is not received from the work target device 11, the second reception flag is set to OFF (S53, see FIG. 6). When the display permission signal is received from the work target device 11, the first reception flag is set to ON (S45, see FIG. 6). Therefore, the CPU 201 first confirms the first permission flag as shown in FIG. 9 (S65). And when it is set to ON (S65: YES), CPU201 confirms a 2nd reception flag next (S67). If it is OFF (S67: NO), then the CPU 201 confirms the first reception flag (S69). If it is ON (S69: YES), the CPU 201 determines that all the above conditions are satisfied. Then, the CPU 201 turns on the second permission flag so that manual display data can be displayed from the display unit 22 (S71). And it returns to the process of S65 and repeats the above-mentioned determination process continuously.

  Note that when the operator 1 performs an input operation via the input unit 207 with the second permission flag set to ON, as described above with reference to FIG. Manual data related to the work target device 11 existing below the viewable distance is displayed on the display unit 22.

  On the other hand, as shown in FIG. 9, after the display terminal 21 displays the permission request data on the display unit 22, the distance between the display terminal 21 and the work target device 11 may be longer than the viewable distance. When an end notification signal is received from the work target device 11, display data being displayed on the display unit 22 needs to be erased. Here, when the distance between the display terminal 21 and the work target device 11 is equal to or greater than the viewable distance, the first permission flag is set to OFF (see S27, FIG. 5). Further, when an end notification signal is received from the work target device 11, the second reception flag is turned on (S51, see FIG. 6). Therefore, the CPU 201 erases the display data being displayed on the display unit 22 when the first permission flag is OFF (S65: NO) or when the second reception flag is ON (S67: YES). Perform the process.

  If the permission request data is being displayed on the display unit 22 (S73: YES), the CPU 201 controls the display control unit 212 to delete the permission request data being displayed (S75). Then, the CPU 201 ends the data display process and returns to the terminal main task. Even if the permission request data is not displayed on the display unit (S73: NO), if the manual display data is being displayed (S77: YES), the CPU 201 displays the display control unit 212. Is controlled to delete the display data of the manual being displayed (S79). Then, the data display process ends, and the process returns to the terminal main task. If the manual display data is not displayed (S77: NO), the CPU 201 ends the data display process and returns to the terminal main task.

  On the other hand, even if the distance between the display terminal 21 and the work target device 11 is less than the viewable distance (S65: YES) and no end notification signal is received (S67: NO), the work target device. When the display permission signal is not received from 11 (S69: NO), the CPU 201 returns to S65 and repeatedly executes the above-described determination processing.

  As described above, the display terminal 21 is in a state where the distance to the work target device 11 is less than the viewable distance and the display permission signal is received from the work target device 11. It is assumed that the manual display data can be displayed on the display unit 22. The display permission signal is transmitted from the work target device 11 when a predetermined input operation is performed on the work target device 11 based on the permission request data displayed on the display unit 22. As described above, the display data is not displayed on the display unit 22 unless the two conditions are cleared, so that highly confidential manual display data can be easily displayed from the display unit 22. It becomes possible to prevent. Therefore, the confidentiality of the manual can be strongly maintained.

  Here, a predetermined input operation method for the work target device 11 which is necessary for transmitting the display permission signal to the work target device 11 is displayed on the display unit 22. As a result, it is possible to prevent display data from being easily displayed on the display unit 22, so that the confidentiality of the manual can be maintained.

  Even after the manual display data is once displayed on the display unit 22, the distance to the work target device 11 is continuously monitored, and the distance between the two becomes equal to or greater than the viewable distance. In this case, display of manual display data from the display unit 22 is prohibited. Thereby, it is possible to prevent display data from being displayed on the display unit 22 in a state where the display terminal 21 is away from the work target device 11, and thus it is possible to further maintain the confidentiality of the manual. .

  Further, when a work end notification indicating that the work of the work target device 11 has been completed is received, the display data being displayed is erased. This makes it possible to prevent the display data of the manual from being displayed on the display unit 22 after the work on the work target device 11 by the worker 1 is completed, so that the confidentiality of the manual is further strongly maintained. Is possible.

  Next, processing executed by the CPU 101 of the work target device 11 will be described with reference to FIGS. FIG. 11 is a flowchart of the device distance determination task. FIG. 12 is a chart of the device end monitoring task. FIG. 13 is a flowchart of the device main task.

  An execution cycle and a priority order are set in advance for each of the device main task, the device distance determination task, and the device end monitoring task. Then, the CPU 101 executes the process of the task whose execution cycle has arrived at any time. Further, when the execution cycle of another task arrives while the processing of any task is being executed by the CPU 101, the CPU 101 selects and executes the processing of the task with the higher priority set. To do. Therefore, when the execution cycle of a task with a high priority arrives during the execution of processing of a task with a low priority, the CPU 101 interrupts the processing of a task with a low priority during the execution. Then, priority is given to the processing of a task with a high priority. Then, after the processing of the task with the higher priority is completed, the CPU 101 resumes the processing of the task with the lower priority from the point of interruption. The device main task, the device distance determination task, and the device end monitoring task are started when the work target device 11 is turned on and the CPU 101 is driven.

  The flags used during the processing of the CPU 101 will be described. As the flag, a release flag, a work end flag, and a work mode flag are used. These flags are stored in the flag storage area 1031 of the RAM 103.

  Among these flags, the release flag is used to indicate a distance state between the work target device 11 and the display terminal 21. Then, in the device distance determination task, when the CPU 101 determines that the distance between the work target device 11 and the display terminal 21 is less than the viewable distance, “1” is stored, which is greater than the viewable distance. If it is determined that there is, “0” is stored.

  The work end flag is used to indicate whether or not the work on the work target device 11 by the worker 1 is finished. In the device end monitoring task, when the CPU 101 determines that the work on the work target device 11 by the worker 1 has been completed, “1” is stored, and it is determined that the work has not been completed yet. In this case, “0” is stored.

  The work mode flag is used to indicate whether or not the worker 1 can work on the work target device 11. In the device main task, “1” is stored when the CPU 101 is in a state where work on the work target device 11 is possible, and “0” is determined when it is determined that work is not possible. Is stored. Here, the state in which the worker 1 can work on the work target device 11 (work mode) is, for example, a mode outside the instruction manual that cannot be used by a normal user, and is a mode that is normally installed in any home appliance. Indicates. The work mode is, for example, a mode in which a person who repairs the work target device 11 can be shifted by performing a special operation in order to check how the contents are broken. During the work mode, for example, “current CPU temperature”, “touch panel ON coordinate display”, “voltage detection”, and other items that are not used when using the normal work target device 11 can be confirmed.

  Hereinafter, when “1” is stored in each of the above-described flags, it is referred to as “the flag is turned on”, and when “0” is stored, it is referred to as “the flag is turned off”.

  The above-described flags stored in the flag storage area 1031 are turned off and initialized when the work target device 11 is powered on and supplied with power to the CPU 101 to start driving.

  The processing of the device distance determination task will be described with reference to the flowchart shown in FIG. In the device distance determination task, the CPU 101 continuously monitors whether the distance between the work target device 11 and the display terminal 21 is less than the viewable distance. As shown in FIG. 11, in the device distance determination task, the CPU 101 monitors the battery voltage by using the built-in power supply voltage monitoring function (S121). Here, when a decrease in the power supply voltage is detected, the CPU 101 determines that the power supply has been cut off (S121: YES). In this case, since the process cannot be continued, post-processing (backup of setting parameters and the like to the EEPROM 104) is performed in order to end the ongoing process. Then, the device distance determination task processing is terminated.

  When the voltage detected by the power supply voltage monitoring function is equal to or higher than a predetermined value and it is determined that the power supply is not cut off (S121: NO), the CPU 101 transmits a signal radio wave including information on the device ID from the RFID reader 106. In order to do this, the device ID stored in the ROM 102 is read. Then, a signal radio wave including information of the read device ID is transmitted via the RFID reader 106 (S123).

  Next, the CPU 101 receives a signal radio wave via the RFID reader 106 (S124). Here, when the worker 1 who owns the display terminal 21 approaches the work target device 11, the signal radio wave including the device ID transmitted in S123 arrives at the RFID tag 206, and the RFID tag 206 receives the signal radio wave. . Next, a response signal is returned from the RFID tag 206 (see FIG. 5, S24, which will be described later). This signal radio wave arrives at the RFID reader 106 and is received and demodulated by the RFID reader 106.

  After transmitting the signal radio wave including the device ID (S123), the CPU 101 receives the signal radio wave via the RFID reader 106 (S124). If it is determined that the signal resulting from demodulating the received signal radio wave is a response signal (S125: YES), the CPU 101 determines that the distance between the work target device 11 and the display terminal 21 is less than the viewable distance. (S125: YES). In this case, the CPU 101 sets the release flag stored in the flag storage area 1031 to ON to indicate that the display terminal 21 is present within the viewable distance from the work target device 11 (S127). Then, the CPU 101 returns to the processing of S121, and continuously checks the connection state of the power source and monitors the distance between the work target device 11 and the display terminal 21.

  On the other hand, when the CPU 101 does not receive a response signal from the RFID reader 106 (S125: NO), the CPU 101 determines that the display terminal 21 does not exist within the viewable distance. In this case, the CPU 101 turns off the release flag stored in the flag storage area 1031 (S129). Then, the CPU 101 returns to the processing of S121, and continuously checks the connection state of the power source and monitors the distance between the work target device 11 and the display terminal 21.

  As described above, the work target device 11 of the present invention uses the RFID reader 106 to determine the distance to the display terminal 21. When the response signal transmitted from the RFID tag 206 included in the display terminal 21 can be received by the RFID reader 106, it is determined that the distance to the display terminal 21 is less than the viewable distance. Thus, the work target device 11 can grasp the distance from the display terminal 21 using the RFID reader 106 without providing an effective dedicated device for distance measurement. Thereby, the cost of the work target device 11 can be suppressed.

  The processing of the device end monitoring task will be described with reference to the flowchart shown in FIG. In the device end monitoring task, the CPU 101 uses the power supply voltage monitoring function built in the CPU 101 to monitor the battery voltage (S131). Here, when a decrease in power supply voltage is detected, the CPU 101 determines that the power supply has been cut off (S131: YES). In this case, since the process cannot be continued, post-processing (backup of setting parameters and the like to the EEPROM 104) is performed in order to end the ongoing process. Then, the device end monitoring task process is terminated.

  When it is determined that the voltage detected by the power supply voltage monitoring function is equal to or higher than the predetermined value and the power supply is not cut off (S131: NO), the CPU 101 is performing work on the work target device 11 by the worker 1 It is determined whether or not. Here, when the work on the work target device 11 is being executed, “1” is stored and turned on in the work mode flag stored in the RAM 103 (see S111, FIG. 13, which will be described later). Therefore, the CPU 101 checks the work mode flag (S133). If the work mode flag is OFF (S133: NO), the CPU 101 determines that the work by the worker 1 is not being executed. In this case, since it is not necessary to monitor the end of work, the CPU 101 returns to S131 without performing any special processing. And the above-mentioned process is repeatedly performed continuously.

  On the other hand, when the work mode flag is ON (S133: YES), the CPU 101 determines that work on the work target device 11 by the worker 1 is continuing. In this case, the CPU 101 switches the operation mode of the work target device 11 to the work mode (S135), and sets the work target device 11 in a workable state. Next, in order to confirm the completion of the operation, the CPU 101 proceeds to the process of S137.

  Next, the CPU 101 monitors the end timing of work on the work target device 11 by the worker 1 (S137). Here, in the present embodiment, it is assumed that the work on the work target device 11 is performed in a state where the front door of the work target device 11 is opened. Accordingly, when the CPU 101 receives the signal from the detection sensor 110 and determines that the front door has been switched from the open state to the closed state, the CPU 101 determines that the work by the worker 1 has ended (S137: YES). Sets the work end flag stored in the flag storage area 1031 to ON to indicate that the work on the work target device 11 by the worker 1 has ended (S139). Then, the CPU 101 returns to the process of S131, and continuously checks the connection state of the power source and monitors the work end timing by the worker 1.

  On the other hand, when the signal from the detection sensor 110 is received and the displacement from the open state of the front door to the closed state is not detected, the CPU 101 continues the work on the work target device 11 by the worker 1. It is determined that it has not ended yet (S137: NO). In such a case, the CPU 101 sets the work end flag stored in the flag storage area 1031 to OFF in order to indicate that the work on the work target device 11 by the worker 1 has not been finished and is continuing. (S141). Then, the CPU 101 returns to S131, and continuously checks the connection state of the power source and monitors the work end timing by the worker 1.

  The processing of the device main task will be described with reference to the flowchart shown in FIG. In the device main task, the CPU 101 first determines whether or not the distance between the work target device 11 and the display terminal 21 is less than the viewable distance (S101). Here, when the distance between the work target device 11 and the display terminal 21 is less than the viewable distance, the release flag stored in the flag storage area 1031 is set to ON (S127, FIG. 11). Therefore, the CPU 101 confirms the release flag and determines the distance. When it is determined that the release flag is OFF and the distance to the display terminal 21 is equal to or greater than the viewable distance (S101: NO), manual display data is not displayed on the display terminal 21 in this state. Therefore, the CPU 101 returns to S101 and monitors the distance from the display terminal 21 by the repeated release flag.

  On the other hand, when the release flag is set to ON and it is determined that the distance to the display terminal is less than the viewable distance (S101: YES), the CPU 101 next displays the display unit 22 of the display terminal 21. Whether or not an input operation has been performed by the worker 1 on the work target device 11 is determined based on the permission request data (see S63 in FIG. 9) displayed here, as described with reference to FIG. In the present embodiment, the character “Please enter the password with the numeric keypad after opening the central drawer” is displayed on the display unit 22 as the permission request data (see FIG. 10). Then, it is determined whether or not a password input operation has been performed through the input unit 107 with the front door opened (S103). If it is confirmed that the door is closed or it is determined that no input has been made via the input unit 107 (S103: NO), manual display data is displayed on the display terminal 21 in this state. Therefore, the CPU 101 returns to S101 and monitors the distance to the display terminal 21 by the repeated release flag and monitors a predetermined input operation.

  On the other hand, if the CPU 101 determines that a password is input through the input unit 107 with the front door open (S103: YES), the CPU 101 stores a predetermined password stored in advance in the hard disk 109. And the input password are compared (S105). If the two do not match (S107: NO), the CPU 101 determines that the input password is invalid, and ends the device main task processing without performing any special processing.

  Here, the password stored in advance in the hard disk 109 and the input password are compared and collated, and if both match (S107: YES), the CPU 101 causes the display terminal 21 to display manual display data. It is determined that a predetermined input operation has been performed. Therefore, the CPU 101 transmits a display permission signal, which is a signal for allowing the display terminal 21 to display manual display data, via the wireless communication module 105 (S109).

  The display terminal 21 that has received the display permission signal is in a state in which manual display data can be displayed on the display unit 22 (see S71 and FIG. 9).

  Next, the CPU 101 sets the work target device 11 in a state where work by the worker 1 is possible, and turns on the work mode flag to indicate that the work target device 11 is in a working state (S111). The CPU 101 monitors the distance between the work target device 11 and the display terminal 21 and monitors the timing when the work by the worker 1 is completed. While work is being performed on the work target device 11 by the worker 1, the distance between the work target device 11 and the display terminal 21 is separated and becomes a viewable distance or more, This is because the display data being displayed on the display unit 22 of the display terminal 21 must be deleted when the work on the work target device 11 by the worker 1 is completed. Here, when the distance between the work target device 11 and the display terminal 21 is equal to or greater than the viewable distance, the release flag is set to OFF (see S129, FIG. 11). Further, when the work by the worker 1 is finished, the work end flag is turned OFF (S139, see FIG. 12). Therefore, the CPU 101 confirms the release flag, and when it is OFF (S113: YES), since the display terminal 21 is separated from the work target device 11, the display unit 22 of the display terminal 21 continues. Since it is not necessary to display the display data on the CPU 101, the CPU 101 ends the device main task.

  If the CPU 101 determines that the distance between the work target device 11 and the display terminal 21 is equal to or greater than the viewable distance, the CPU 201 can similarly view the distance between the work target device 11 on the display terminal 21. It is determined that the distance has been exceeded (see S27 in FIG. 5). In this case, the CPU 201 deletes the display data being displayed on the display unit 22 (see S75, S79, FIG. 9).

  On the other hand, even when the release flag is ON and the distance between the work target device 11 and the display terminal 21 is less than the viewable distance position (S113: NO), the front door is changed from the open state to the closed state. When the CPU 101 recognizes the displacement (S115: YES), the CPU 101 determines that the work on the work target device 11 by the worker 1 is completed. In such a case, the manual display data displayed on the display unit 22 of the display terminal 21 must not be displayed any more and must be deleted. Therefore, the CPU 101 transmits an end notification signal that is a signal for notifying the display terminal 21 that the work on the work target device 11 has ended (S117), and is displayed on the display unit 22 of the display terminal 21. Clear the display data in the manual for the status. Next, the CPU 101 sets the work target device 11 in a state where the work by the worker 1 is impossible, and turns off the work mode flag to indicate that the work target device 11 is not in a working state (S118). Then, the device main task ends.

  On the other hand, in the display terminal 21 that has received the end notification signal, a process of erasing the display data being displayed on the display unit 22 is performed (S75, S79, see FIG. 9).

  Further, the CPU 101 is in a state where the distance between the work target device 11 and the display terminal 21 is less than the viewable distance (S113: NO) and the work by the worker 1 has not been finished yet (S115: NO). Since it is not necessary to delete the display data displayed on the display unit 22 of the display terminal 21, the process returns to S101 and the above-described process is repeated.

  As described above, the work target device 11 is displayed on the display terminal 21 when a predetermined input operation is performed by the worker 1 in a state where the distance to the display terminal 21 is less than the viewable distance. In response, a display permission signal is transmitted. Since the display terminal 21 cannot display the manual display data on the display unit 22 without receiving the display permission signal, the manual display data is easily displayed on the display unit 22. Can be prevented, and the confidentiality of the manual can be maintained.

  Further, when the work on the work target device 11 is completed, the display terminal 21 is notified, and the display data displayed on the display unit 22 can be deleted. Accordingly, since it is possible to control the display data not to be displayed on the display unit 22 when the work target device 11 is not being operated, it is possible to further maintain the confidentiality of the manual. .

  The display unit 22 included in the display terminal 21 illustrated in FIG. 2 corresponds to the “display unit” of the present invention, the manual storage area 2101 included in the memory card 210 corresponds to the “terminal storage unit” of the present invention, In S42 of FIG. 6, the CPU 201 that performs processing for receiving the signal radio wave via the wireless communication module 205 corresponds to the “terminal receiving means” of the present invention. In the terminal distance determination task shown in FIG. The CPU 201 that performs the process of determining the distance to the work target device 11 depending on whether or not the signal radio wave including the device ID is received corresponds to the “terminal distance determining means” of the present invention, and is shown in FIG. In S25, the CPU 201 that performs the process of turning on the first permission flag corresponds to the “first permission means” of the present invention, and received the display permission signal in S43 of FIG. The CPU 201 that performs the process of determining whether or not corresponds to the “display permission determination unit” of the present invention, and the CPU 201 that performs the process of turning on the second permission flag in S71 of FIG. The CPU 201 that performs control for displaying the display data on the display unit 22 in S35 of FIG. 7 corresponds to the “first display control unit” of the present invention. In S63 of FIG. The CPU 201 that performs processing for displaying data corresponds to the “second display control unit” of the present invention.

  Further, the CPU 201 that performs the process of turning off the first permission flag in S27 of FIG. 5 corresponds to the “separation prohibiting means” of the present invention, and determines whether or not the end notification signal is received in S49 of FIG. The CPU 201 that performs the process corresponds to the “end notification determination unit” of the present invention. In S79 of FIG. 2 and the input unit 207 in FIG. 2 corresponds to “terminal input means” of the present invention.

  3 corresponds to the “apparatus input unit” of the present invention, and the wireless communication module 105 corresponds to the “apparatus transmission unit” of the present invention. Further, in the device distance determination task of FIG. 11, the CPU 101 that performs processing for determining the distance to the display terminal 21 depending on whether or not the signal radio wave is received by the RFID reader 106 is “device distance determination” of the present invention. The CPU 101 that performs the process of determining whether or not a predetermined password has been input in S107 in FIG. 13 corresponds to the “apparatus input determination unit” of the present invention. In S109, a display permission signal is output. The CPU 101 that performs the transmission processing corresponds to “permitted transmission control means” of the present invention.

  Further, in S137 of FIG. 12, the CPU 101 that performs the process of determining whether the work is completed based on the received signal from the detection sensor 110 corresponds to the “end detection unit” of the present invention, and in S117 of FIG. The CPU 101 that performs the process of transmitting the end notification signal corresponds to the “end notification transmission control unit” of the present invention, and the CPU 101 that performs the process of shifting to the maintenance mode in S135 of FIG. It corresponds to “switching means”.

In addition, this invention is not limited to the said embodiment, A various change is possible. Hereinafter, the second embodiment, the third embodiment, and the fourth embodiment of the present invention will be described.
<Second Embodiment>

  Below, 2nd embodiment of this Embodiment is described with reference to drawings. In the second embodiment, permission request data and manual display data displayed on the display terminal 21 are stored in the hard disk 109 of the work target device 11. Then, it is transmitted from the work target device 11 to the display terminal 21 at a timing when the permission request data is displayed on the display terminal 21. The display terminal 21 receives permission request data from the work target device 11 and causes the display unit 22 to display the received permission request data and manual display data. As a result, it becomes possible to display different permission request data for each work target device 11 on the display terminal 21, and manual display data is stored in the display terminal 21 only when necessary, thus preventing manual leakage. It becomes possible to do.

  Hereinafter, a description will be given with reference to FIGS. FIG. 14 is a flowchart of a terminal reception task executed by the CPU 201 of the display terminal 21. FIG. 15 is a flowchart of data table processing executed by the CPU 201. FIG. 16 is a flowchart of a device main task executed by the CPU 101 of the work target device 11.

  Other tasks executed by the CPU 201 (terminal distance determination task (see FIG. 5), terminal input monitoring task (see FIG. 7), terminal main task (see FIGS. 8 and 9)) are the same as those described above. Since it is the same as that of one embodiment, description is abbreviate | omitted. Also, description of processing portions common to the terminal reception task in the first embodiment shown in FIG. 6 and the data display processing in the first embodiment shown in FIG. 9 is omitted or simplified.

  Further, other tasks executed by the CPU 101 (device distance determination task (see FIG. 11) and device end monitoring task (see FIG. 12)) are the same as those in the first embodiment described above, and thus description thereof is omitted. To do. Also, description of processing portions common to the device main task in the first embodiment shown in FIG. 13 is omitted or simplified.

  As a flag used at the time of processing of the CPU 201 in the second embodiment, a third reception flag is used in addition to the same flag as in the first embodiment. The third flag is used to indicate whether permission request data and manual display data have been received from the work target device 11. In the terminal reception task, when the CPU 201 determines that the permission request data and the manual display data are received, “1” is stored, and the permission request data and the manual display data are not yet received. If it is determined, “0” is stored.

  In addition, as a flag used at the time of the process of CPU101 in 2nd embodiment, the flag similar to 1st embodiment is used.

  Hereinafter, when “1” is stored in each of the above-described flags, it is referred to as “the flag is turned on”, and when “0” is stored, it is referred to as “the flag is turned off”.

  The process of the terminal reception task in the second embodiment will be described with reference to the flowchart shown in FIG. In the terminal reception task, the CPU 201 receives a signal radio wave via the wireless communication module 205. Then, a signal obtained by demodulating the received signal radio wave is determined, and the content of the radio signal transmitted from the work target device 11 is determined.

  As shown in FIG. 14, the CPU 201 monitors the battery voltage notified from the battery connection sensor 215 and monitors the connection state of the battery (S201). Here, when the CPU 201 determines that the battery 213 has been removed (S201: YES), after the ongoing processing is terminated and post-processing (backup of setting parameters etc. to the EEPROM 204) is performed, the terminal Ends the receive task processing.

  When it is determined that the battery 213 is connected (S201: NO), the CPU 201 receives and demodulates the signal radio wave via the wireless communication module 205 (S202). If it is determined that the received signal is a display permission signal (S203: YES), the CPU 201 turns on the first reception flag stored in the flag storage area 2031 (S205). Then, the CPU 201 proceeds to the process of S209. On the other hand, when the CPU 201 has not received the display permission signal via the wireless communication module 205 (S203: NO), the CPU 201 turns OFF the first reception flag stored in the flag storage area 2031 (S207). Then, the CPU 201 proceeds to the process of S209.

  In S209, when the CPU 201 determines that the signal received via the wireless communication module 205 is an end notification signal (S209: YES), the CPU 201 sets the second reception flag stored in the flag storage area 2031 to ON. (S211) Then, the CPU 201 proceeds to the process of S215. On the other hand, when the CPU 201 has not received the display permission signal from the wireless communication module 205 (S209: NO), the CPU 201 turns OFF the second reception flag stored in the flag storage area 2031 (S213). Then, the CPU 201 proceeds to the process of S215.

  In S215, when the CPU 201 determines that the signal received via the wireless communication module 205 is the permission request data to be displayed on the display unit 22 and the manual display data (S215: YES), the CPU 201 receives the received permission. The requested data is stored in the memory card 210, and the received manual display data is stored in the manual storage area 2101 (S216). Next, the CPU 201 turns on the third reception flag stored in the flag storage area 2031 (S217). Then, the CPU 201 returns to the processing of S201, and continuously checks the connection state of the battery 213 and performs reception monitoring of the signal radio wave transmitted from the work target device 11.

  On the other hand, when the CPU 201 does not receive the permission request data and the manual display data via the wireless communication module 205 (S215: NO), the CPU 201 sets the third reception flag stored in the flag storage area 2031 to OFF. (S219). Then, the CPU 201 returns to the processing of S201, and continuously checks the connection state of the battery 213 and performs reception monitoring of the signal radio wave transmitted from the work target device 11.

  With reference to FIG. 15, the data display processing in the second embodiment will be described. In the data display process, the CPU 201 reads out the device ID received in S22 (see FIG. 5) of the terminal distance determination task and stored in the RAM 203 (S221). Next, the CPU 201 determines whether or not the distance between the work target device 11 and the display terminal 21 is less than the viewable distance. Here, when the distance is less than the viewable distance, the first permission flag is set to ON, and when the distance is equal to or greater than the viewable distance, the first permission flag is set to OFF. Therefore, the CPU 201 confirms the first permission flag, and when it is OFF (S223: NO), it is determined that the display terminal 21 has once approached the work target device 11 but has been separated again. . In such a case, manual display data is not displayed on the display unit 22 of the display terminal 21. Therefore, the CPU 201 ends the process without performing display control on the display unit 22.

  When it is determined that the first permission flag is ON and the distance between the display terminal 21 and the work target device 11 is less than the viewable distance (S223: YES), the CPU 201 then selects the work target device 11. It is then determined whether permission request data and manual display data are received (S225). When the permission request data and the manual display data are received, the third reception flag is set to ON (S217, see FIG. 14). Therefore, the CPU 201 confirms the third reception flag. If it is determined that the third reception flag is OFF and the permission request data and the manual display data are not received (S225: NO), the permission request data to be displayed on the display unit 22 and the manual display data are displayed. Since the display data has not yet been received, the CPU 201 returns to the process of S223 and continues to check the first permission flag and the third reception flag. Then, the distance between the display terminal 21 and the work target device 11 and the reception of permission request data and manual display data are monitored.

  On the other hand, when the third reception flag is set to ON and it is determined that the permission request data and the manual display data are received (S225: YES), the CPU 201 controls the display control unit 212, and receives S216 ( In the processing of FIG. 14, the permission request data stored in the memory card 210 is read and displayed on the display unit 22 (S227). Here, the permission request data is display data indicating an input operation to be performed on the work target device 11 in order to cause the work target device 11 to transmit a display permission signal (see FIG. 10).

  In the work target device 11, when an input operation based on the permission request data displayed on the display unit 22 is performed by the worker 1 in this state, a display permission signal is transmitted to the display terminal 21 (S319, FIG. 16, see below).

  Next, the CPU 201 has a distance between the display terminal 21 and the work target device 11 that is less than the viewable distance, has not received an end notification signal from the work target device 11, and has received a display permission signal from the work target device 11. In this case, the display data of the manual can be displayed from the display unit 22. The CPU 201 first checks the first permission flag (S229). If it is ON (S229: YES), then the CPU 201 confirms the second reception flag (S231). If it is OFF (S231: NO), then the CPU 201 confirms the first reception flag (S235). If it is ON (S235: YES), the CPU 201 makes it possible to display the manual display data stored in the manual storage area 2101 in S216 (see FIG. 14) from the display unit 22. Then, the second permission flag is turned ON (S237). Then, the process proceeds to S229.

  If the operator 1 performs an input operation via the input unit 207 with the second permission flag set to ON, the CPU 201 stores the manual stored in the manual storage area 2101 in S216 (see FIG. 14). Display data is read from the manual storage area 2101. Then, the display data of the read manual is displayed on the display unit 22 (see S35, FIG. 7).

  On the other hand, if the first permission flag is set to OFF (S229: NO) or the second reception flag is set to ON (S231: YES), the CPU 201 displays the display data being displayed on the display unit 22. Process to delete.

  If the permission request data is displayed on the display unit 22 (S239: YES), the CPU 201 controls the display control unit 212 to delete the permission request data (S241). Then, the data display process is terminated, and the process returns to the terminal main task (see FIG. 8). Even if the permission request data is not displayed on the display unit (S239: NO), if the manual display data is being displayed (S243: YES), the CPU 201 displays the display control unit 212. To display the manual display data (S245). Then, the data display process is terminated, and the process returns to the terminal main task (see FIG. 8). If the manual display data is not displayed (S243: NO), the CPU 201 terminates the process and returns to the terminal main task.

  On the other hand, even if the distance between the display terminal 21 and the work target device 11 is less than the viewable distance (S229: YES) and no end notification signal is received (S231: NO), the work target device. When the display permission signal is not received from 11 (S235: NO), the CPU 201 returns to S229 and repeats the above-described processing repeatedly.

  Next, with reference to FIG. 16, the processing of the device main task in the second embodiment will be described. In the device main task, the CPUI 101 first determines whether or not the distance between the work target device 11 and the display terminal 21 is less than the viewable distance (S311). Here, the CPU 101 confirms the release flag. When the release flag is OFF and it is determined that the distance to the display terminal 21 is equal to or greater than the viewable distance (S311: NO), the CPU 101 displays manual display data on the display terminal 21. Since it is not displayed, it returns to S311 and monitors the distance with the display terminal 21 repeatedly.

  On the other hand, when the release flag is set to ON and it is determined that the distance to the display terminal 21 is less than the viewable distance (S311: YES), the CPU 101 then sends permission request data via the wireless communication module 105. Then, the manual display data is transmitted via the wireless communication module 105 (S313). Next, the transmitted permission request data is displayed on the display unit 22 of the display terminal 21 (see FIG. 15, S227), and it is determined whether or not the worker 1 referring to this has performed a predetermined input operation on the work target device 11. To do. The CPU 101 determines whether a password has been input by the operator 1 via the input unit 107 with the front door opened (S314). When the detection sensor 110 confirms that the front door is in a closed state or when it is determined that no input has been made via the input unit 107 (S314: NO), the display terminal 21 is manually operated. The CPU 101 returns to S311 and repeatedly monitors the distance to the display terminal 21 and the predetermined input operation (S311 and S313).

  On the other hand, when the CPU 101 detects that the password input operation has been performed by the operator 1 via the input unit 107 while the detection sensor 110 detects that the front door is open. (S314: YES), the password stored in advance in the hard disk 109 is compared with the input password (S315). If the two do not match (S317: NO), the CPU 101 determines that the input password is invalid, and ends the device main task processing without performing any special processing.

  If the password stored in advance in the hard disk 109 matches the input password (S317: YES), the CPU 101 displays the manual display data transmitted in S313 on the display terminal 21. In order to permit, a display permission signal is transmitted through the wireless communication module 105 (S319). Next, the CPU 101 sets the work target device 11 in a state in which the work by the worker 1 is possible, and turns on the work mode flag to indicate that the work target device 11 is in a working state (S321).

  In this state, the CPU 101 monitors the distance between the work target device 11 and the display terminal 21. When the distance between the work target device 11 and the display terminal 21 is equal to or greater than the viewable distance, the release flag is turned off. When this is detected by the CPU 101 (S323: YES), the display terminal 21 has been separated from the work target device 11, and therefore it is not necessary to continuously display the display data on the display unit 22 of the display terminal 21. Judgment is made, and the CPU 101 ends the device main task.

  On the other hand, even if the release flag is ON and the distance between the work target device 11 and the display terminal 21 is less than the viewable distance (S323: NO), the front door is closed. When this is detected by the detection sensor 110, the CPU 101 determines that the work on the work target device 11 by the worker 1 has been completed. In such a case, manual display data displayed on the display unit 22 of the display terminal 21 must not be displayed any more and must be erased. Therefore, when the work end flag is set to OFF (S325: YES), the CPU 101 transmits an end notification signal to the display terminal 21 and is in the state displayed on the display unit 22 of the display terminal 21. Is deleted (S327). Next, the CPU 101 sets the work target device 11 in a state in which the work by the worker 1 is impossible, and turns off the work mode flag to indicate that the work target device 11 is not in a work state (S328). Then, the device main task ends.

  Further, when the CPU 101 determines that the front door is open and the work by the worker 1 is continuing (S325: NO), the CPU 101 returns to S311 and repeatedly executes the above-described processing. To do.

  As described above, since the display terminal 21 displays the permission request data received from the work target device 11 on the display unit 22, it is not necessary to store the permission request data in the memory card 210 in advance. Thereby, it is possible to suppress the storage capacity of the memory card 210 that the display terminal 21 should have, and to reduce the cost of the display terminal 21.

  In addition, since the display terminal 21 displays the permission request data received from the work target device 11 on the display unit 22, the content of the permission request data can be changed on the work target device 11 side. Thereby, even if the input operation method necessary for transmitting the display permission signal differs for each work target device 11, the input operation method is displayed on the display unit 22 of the display terminal 21 as permission request data. It becomes possible to make it.

  Further, by changing the input operation necessary for transmitting the display permission signal on the work target device 11 side, it is possible to easily control the display permission signal not to be displayed. The confidentiality of the display data displayed on the unit 22 can be further strongly maintained.

  Further, since the display terminal 21 displays the manual display data received from the work target device 11 on the display unit 22, it is not necessary to store the manual display data in the manual storage area 2101 of the memory card 210 in advance. Thereby, it is possible to suppress the storage capacity of the memory card 210 that the display terminal 21 should have, and to reduce the cost of the display terminal 21.

  The display terminal 21 prevents the manual display data from being stolen because the manual display data is not stored in the memory card 210 when the display data is not displayed on the display unit 22. It becomes possible to maintain the confidentiality of the manual more strongly.

  Note that the CPU 201 that determines whether or not manual display data has been received in S215 in FIG. 14 corresponds to the “display data determination means” of the present invention, and determines whether or not permission request data has been received. The CPU 201 to perform corresponds to the “permission request data determination unit” of the present invention. Further, the CPU 201 that performs processing for storing the manual display data in the manual storage area 2101 in S216 of FIG. 14 corresponds to the “terminal storage control means” of the present invention. Further, the CPU 201 that performs control to display the permission request data on the display unit 22 in S227 of FIG. 15 corresponds to the “second display control unit” of the present invention.

Also, the hard disk 109 in FIG. 3 corresponds to the “device storage unit” of the present invention, and the CPU 101 that performs control to transmit permission request data in S312 of FIG. 16 serves as the “display instruction transmission control unit” in the present invention. The CPU 101 that performs control to transmit manual display data in S312 corresponds to the “terminal storage control unit” of the present invention.
<Third embodiment>

  Below, 3rd Embodiment of this Embodiment is described with reference to drawings. FIG. 17 is a schematic diagram illustrating an electrical configuration of the display terminal 21 in the third embodiment, and FIG. 18 is a schematic diagram illustrating an electrical configuration of the work target device 11 in the third embodiment. . FIG. 19 is a flowchart of a terminal distance determination task in the third embodiment. FIG. 20 is a flowchart of the device distance determination task in the third embodiment.

  The other tasks executed by the CPU 201 (terminal reception task (see FIG. 6), terminal input monitoring task (see FIG. 7), terminal main task (see FIGS. 8 and 9)) are the first described above. Since this is the same as the embodiment, the description thereof is omitted. Also, description of processing parts common to the terminal distance determination task in the first embodiment shown in FIG. 5 is omitted or simplified.

  Further, other tasks executed by the CPU 101 (device end monitoring task (see FIG. 12) and device main task (see FIG. 13)) are the same as those in the first embodiment described above, and thus description thereof is omitted. . Also, description of processing parts common to the device distance determination task in the first embodiment shown in FIG. 11 is omitted or simplified.

  In the third embodiment, the display terminal 21 includes an RFID reader 216 instead of the RFID tag 206 in the first embodiment, as shown in FIG. Further, as shown in FIG. 18, the work target device 11 includes an RFID tag 116 instead of the RFID reader 106 in the first embodiment. When the display terminal 21 receives a response signal from the RFID tag 116 included in the work target device 11 with respect to the signal radio wave transmitted from the RFID reader 216, the distance between the display terminal 21 and the work target device 11. Is determined to be less than the viewable distance. In addition, when the work target device 11 can receive the signal radio wave transmitted from the RFID reader 216 included in the display terminal 21, the distance between the work target device 11 and the display terminal 21 is less than the viewable distance. to decide. By executing the above processing, the display terminal 21 and the work target device 11 determine the distance between them. The display terminal 21 and the work target device 11 are the same in the other configurations as in the first embodiment, and thus the description thereof is omitted.

  With reference to FIG. 19, the processing of the terminal distance determination task will be described. In the terminal distance determination task, the CPU 201 continuously monitors whether the distance between the display terminal 21 and the work target device 11 is less than the viewable distance. As shown in FIG. 19, the CPU 201 first monitors the battery voltage notified from the battery connection sensor 215 (S251). Here, when the battery voltage notified from the battery connection sensor 215 is less than the predetermined value and it is determined that the battery 213 has been removed (S251: YES), the ongoing processing is terminated and the post-processing ( After the setting parameters are backed up to the EEPROM 204, etc., the terminal distance determination task processing is terminated.

  When it is determined that the voltage detected by the power supply voltage monitoring function is equal to or higher than a predetermined value and the power supply is not cut off (S251: NO), the CPU 201 transmits a predetermined signal radio wave via the RFID reader 216 ( S253).

  Next, the CPU 201 determines whether a signal radio wave has been received via the RFID reader 216. Here, when the display terminal 21 is in the proximity of the work target device 11 and the radio wave signal transmitted in S253 is received by the RFID tag 116, a response signal is transmitted from the RFID tag 116 (S304, FIG. 20). See below). This response signal is received via the RFID reader 216 and demodulated.

  When the CPU 201 determines that a response signal has been received via the RFID reader 216 (S255: YES), the CPU 201 determines that the distance between the work target device 11 and the display terminal 21 is less than the viewable distance. to decide. Next, the CPU 201 turns on the first permission flag stored in the flag storage area 2031 to indicate that the display terminal 21 exists within a predetermined distance from the work target device 11 (S257). Then, the CPU 201 returns to the process of S251, and continuously checks the connection state of the power source and monitors the distance between the work target device 11 and the display terminal 21.

  On the other hand, when the CPU 201 does not receive a response signal via the RFID reader 216 (S255: NO), the CPU 201 determines that the work target device 11 does not exist within a viewable distance from the display terminal 21. In this case, the CPU 201 turns OFF the first permission flag stored in the flag storage area 2031 (S259). Then, the CPU 201 returns to the process of S251, and continuously checks the connection state of the power source and monitors the distance between the work target device 11 and the display terminal 21.

  With reference to FIG. 20, a flowchart of the device distance determination task will be described. In the device distance determination task, the CPU 101 uses the power supply voltage monitoring function built in the CPU 101 to monitor the battery voltage (S301). If it is determined that the power supply voltage has dropped and the power supply has been cut off (S301: YES), the CPU 101 terminates the ongoing processing and performs post-processing (backup of setting parameters and the like to the EEPROM 104). Etc., the device distance determination task processing is terminated.

  As a result of monitoring by the power supply voltage monitoring function, when it is determined that the power supply voltage is not detected and the power supply is connected (S301: NO), the CPU 101 receives data from the connected RFID tag 116. Determine whether it has been received. Here, the display terminal 21 continuously transmits signal radio waves from the RFID reader 216 (see S253, FIG. 19). When the display terminal 21 approaches the work target device 11, the radio wave signal transmitted from the RFID reader 216 is received via the RFID tag 116 and demodulated.

  When the CPU 101 receives the demodulated signal via the RFID tag 116 and determines that the signal radio wave has been received (S303: YES), the CPU 101 determines that the distance to the display terminal 21 is less than the viewable distance. . In this case, the CPU 101 transmits a response signal to the RFID reader 216 via the RFID tag 116 (S304). Next, the CPU 101 turns on the release flag stored in the flag storage area 1031 in order to indicate that the display terminal 21 exists within a viewable distance from the work target device 11 (S305). Then, the CPU 101 returns to the process of S301, and continuously checks the connection state of the power source and monitors the distance between the display terminal 21 and the work target device 11.

  On the other hand, when the CPU 101 does not receive the response signal via the RFID tag 116 (S303: NO), the CPU 101 determines that the display terminal 21 does not exist within the viewable distance. In this case, the CPU 101 turns off the release flag stored in the flag storage area 1031 (S307). Then, the CPU 101 returns to the process of S301, and continuously checks the connection state of the power source and monitors the distance between the display terminal 21 and the work target device 11.

  As described above, the display terminal 21 includes the RFID reader 216. Then, the distance from the display terminal is determined based on whether or not the response radio wave signal returned from the RFID tag 116 included in the work target device 11 can be received with respect to the radio wave signal transmitted from the RFID reader 216. To do. As a result, it is possible to easily determine the distance to the display terminal at a low cost, and thus the cost of the display terminal 21 can be suppressed.

  In addition, the work target device 11 includes an RFID tag 116. Then, the distance to the display terminal 21 is determined based on whether or not the radio wave signal transmitted from the RFID reader 216 can be received. As a result, it is possible to easily determine the distance to the display terminal 21 at a low cost, and thus the cost of the work target device 11 can be suppressed.

1 is a schematic diagram showing an outline of a manual browsing system 100. FIG. 3 is a schematic diagram showing an electrical configuration of a display terminal 21. FIG. 3 is a schematic diagram showing an electrical configuration of a work target device 11. FIG. 3 is a schematic diagram showing a manual storage area 211. FIG. It is a flowchart of a terminal distance judgment task. It is a flowchart of a terminal reception task. It is a flowchart of a terminal input monitoring task. It is a flowchart of a terminal main task. It is a subroutine flowchart of a data display process. An example of permission request data in a state displayed on the display unit 22 is shown. It is a flowchart of an apparatus distance judgment task. It is a chart of a device end monitoring task. It is a flowchart of an apparatus main task. It is a flowchart of a terminal reception task in the second embodiment. It is a flowchart of the data table process in 2nd embodiment. It is a flowchart of the apparatus main task in 2nd embodiment. It is a schematic diagram which shows the electric constitution of the display terminal 21 in 3rd embodiment. It is a schematic diagram which shows the electrical structure of the work target apparatus 11 in 3rd embodiment. It is a flowchart of the terminal distance judgment task in 3rd embodiment. It is a flowchart of the apparatus main task in 3rd embodiment.

Explanation of symbols

11 Work target device 21 Display terminal 22 Display unit 100 Manual browsing system 101 CPU
105 wireless communication module 106 RFID reader 107 input unit 109 hard disk 110 detection sensor 116 RFID tag 201 CPU
205 wireless communication module 206 RFID tag 207 input unit 210 memory card 211 manual storage area 216 RFID reader 1031 flag storage area 2031 flag storage area 2101 manual storage area

Claims (18)

A display terminal for displaying manual display data in the work target device,
Display means for displaying the display data;
Terminal storage means for storing the display data;
Terminal receiving means for receiving a signal transmitted from the work target device;
Terminal distance determining means for determining a distance between the work target devices;
When the terminal distance determining means determines that the distance to the work target device is less than a predetermined value, the terminal receiving means permits reception of a signal and is transmitted from the work target device. First permission means to wait for,
When the signal is received by the terminal receiving unit in a state where the signal is permitted to be received by the first permission unit, the signal is used to permit the display data to be displayed on the display unit. A display permission determination means for determining whether or not the display permission signal is a signal transmitted from the work target device when a predetermined input is made to the target device;
In the display permission determining means, when it is determined that the received signal is a display permission signal, second permission means for permitting display of the display data on the display means,
A display terminal comprising: first display control means for performing control to display the display data on the display means in a state where display of the display data is permitted by the second permission means. In the state where the display of the display data on the display unit is permitted by the second permission unit, the terminal distance determination unit determines that the distance to the work target device is greater than or equal to a predetermined value. A separation prohibiting means for prohibiting display of the display data on the display means,
The first display control means includes
The display terminal according to claim 1, wherein when the display is prohibited by the separation prohibiting unit, the display data is not displayed on the display unit. When a signal is received by the terminal reception unit in a state where the display of the display data on the display unit is permitted by the second permission unit, the signal is a predetermined work for the work target device. An end notification determining means for determining whether or not it is an end notification signal that is a signal transmitted from the work target device when it is ended;
A notification prohibiting unit for prohibiting display of the display data on the display unit when the end notification determining unit determines that the received signal is the end notification signal;
The first display control means includes
3. The display terminal according to claim 1, wherein when the display is prohibited by the notification prohibiting unit, the display data is not displayed on the display unit. 4. A signal is received by the terminal receiving means in a state where reception of the signal is permitted by the first permission means, or in a state where display of the display data on the display means is permitted by the second permission means. Display data determining means for determining whether the signal is display data transmitted from the work target device,
2. The storage device according to claim 1, further comprising: a terminal storage control unit that stores the display data in the terminal storage unit when the display data determination unit determines that the received signal is the display data. 4. The display terminal according to any one of 3. A display in which the signal is transmitted from the work target device when a signal is received by the terminal reception unit in a state where the display of the display data on the display unit is permitted by the first permission unit. Permission request data determination means for determining whether the data is permission request data that is display data to be displayed on the display means to prompt the work target device to transmit the display permission signal;
The permission request data determining means includes a second display control means for performing control to display the permission request data on the display means when it is determined that the received signal is the permission request data. A display terminal according to any one of claims 1 to 4. The terminal storage means stores permission request data that is display data to be displayed on the display means in order to prompt the work target device to transmit the display permission signal.
When a signal is received by the terminal reception unit in a state where the display of the display data on the display unit is permitted by the first permission unit, the signal is sent to the display unit of the permission request data. Display instruction determination means for determining whether or not the display instruction signal is a signal transmitted from the work target device to instruct the display of
The display instruction determining means includes second display control means for performing control to display the permission request data on the display means when it is determined that the received signal is the display instruction signal. The display terminal according to claim 1. Equipped with an RFID reader,
The terminal distance determining means includes
When the radio wave signal transmitted from the RFID tag provided in the work target device can be received by the RFID reader, it is determined that the distance from the work target device is less than a predetermined value,
7. The apparatus according to claim 1, wherein when the radio wave signal transmitted from the RFID tag cannot be received by the RFID reader, it is determined that the distance to the work target device is a predetermined distance or more. The display terminal in any one of. Equipped with RFID tags,
The terminal distance determining means includes
When the radio wave signal transmitted from the RFID reader provided in the work target device can be received by the RFID tag, it is determined that the distance to the work target device is less than a predetermined value,
7. The apparatus according to claim 1, wherein when the radio wave signal transmitted from the RFID reader cannot be received by the RFID tag, it is determined that the distance to the work target device is a predetermined distance or more. The display terminal in any one of. Terminal input means for inputting instructions relating to the display data,
The first display control means includes
In the state where the display of the display data on the display unit is permitted by the second permission unit, the display data is displayed on the display unit when an instruction to display the display data is input from the terminal input unit. The display terminal according to claim 1, wherein display control is performed. Work equipment,
Device input means which is an input means for receiving input;
Device transmitting means for transmitting a signal to a display terminal capable of displaying display data of the manual of the work target device;
Device distance determining means for determining the distance to the display terminal;
In the device distance determining means, when it is determined that the distance to the display terminal is less than a predetermined value, a device input determining means for determining whether or not a predetermined input is made to the device input means;
When the device input determining means determines that a predetermined input has been made, permission transmission is performed for controlling the display terminal to transmit a display permission signal, which is a signal for permitting display of data, to the display terminal. Work target equipment provided with a control means. End detecting means for detecting that a predetermined work on the work target device is completed;
When the end detection means detects that the predetermined work has been completed, an end notification signal, which is a signal for notifying the display terminal that the predetermined work has been completed, is transmitted from the device transmission means. The work target device according to claim 10, further comprising an end notification transmission control unit configured to perform control. Device storage means for storing manual display data;
When the device distance determining means determines that the distance to the display terminal is less than a predetermined value, or when the device input determining means determines that a predetermined input has been made, the display data 12. The work target device according to claim 10 or 11, further comprising display data transmission control means for performing control to transmit data from the device transmission means.   When the device distance determining means determines that the distance to the display terminal is less than a predetermined value, a display is made on the display terminal to prompt the work target device to transmit the display permission signal. The work target device according to claim 10, further comprising permission request transmission control means for performing control to transmit permission request data that is display data to be transmitted from the device transmission means.   When the device distance determining means determines that the distance to the display terminal is less than a predetermined value, a display is made on the display terminal to prompt the work target device to transmit the display permission signal. 13. A display instruction transmission control unit that performs control to transmit a display instruction signal that is a signal for instructing display of permission request data that is display data to be transmitted from the device transmission unit. The work target device according to any one of the above. Equipped with an RFID reader,
The device distance judging means is
When the radio wave signal transmitted from the RFID tag provided in the display terminal can be received by the RFID reader, it is determined that the distance from the display terminal is less than a predetermined value,
15. The radio frequency signal transmitted from the RFID tag is determined not to be received by the RFID reader, and the distance to the display terminal is determined to be a predetermined distance or more. The work target device according to any one of the above. Equipped with RFID tags,
The device distance judging means is
When the radio wave signal transmitted from the RFID reader provided in the display terminal can be received by the RFID tag, it is determined that the distance to the display terminal is less than a predetermined value,
15. The method according to claim 10, wherein when the radio wave signal transmitted from the RFID reader cannot be received by the RFID tag, the distance to the display terminal is determined to be a predetermined distance or more. The work target device according to any one of the above.   The apparatus input determining means includes mode switching means for switching the work target device to a workable mode, which is a mode in which a predetermined work can be performed, when it is determined that a predetermined input has been made. The work target device according to any one of 10 to 16. A manual browsing system comprising a work target device and a display terminal for displaying display data of the manual of the work target device,
The display terminal
Display means for displaying the display data;
Terminal storage means for storing the display data;
Terminal receiving means for receiving a signal transmitted from the work target device;
Terminal distance determining means for determining a distance between the work target devices;
When the terminal distance determining means determines that the distance to the work target device is less than a predetermined value, the terminal receiving means permits reception of a signal and is transmitted from the work target device. First permission means to wait for,
When the signal is received by the terminal receiving unit in a state where the signal is permitted to be received by the first permission unit, the signal is used to permit the display data to be displayed on the display unit. Display permission determination means for determining whether or not the display device is a display permission signal that is a signal transmitted from the work target device when a predetermined input is made to the target device;
In the display permission determining means, when it is determined that the received signal is a display permission signal, second permission means for permitting display of the display data on the display means,
In a state where the display of the display data is permitted by the second permission means, the first display control means for performing control to display the display data on the display means,
The work target device is:
Device input means which is an input means for receiving input;
Device transmitting means for transmitting a signal to a display terminal capable of displaying display data of the manual of the work target device;
Device distance determining means for determining the distance to the display terminal;
In the device distance determining means, when it is determined that the distance to the display terminal is less than a predetermined value, a device input determining means for determining whether or not a predetermined input is made to the device input means;
When the device input determining means determines that a predetermined input has been made, permission transmission is performed for controlling the display terminal to transmit a display permission signal, which is a signal for permitting display of data, to the display terminal. A manual browsing system characterized by comprising control means.

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