JP2021189630A - Portable terminal device for facility maintenance system, facility maintenance system and facility maintenance program - Google Patents

Abstract

To provide a technique which can sufficiently ensure a security when portable terminal devices are applied in a facility maintenance system and is quite useful for preventing the leakage, etc., of secret information.SOLUTION: A portable terminal device 10 for a facility maintenance system is configured to be carried by a maintenance worker of a facility, and includes: a communicating unit 11 that communicates with a management server device 20 which manages maintenance information on the facility; an operation application unit 14b that performs at least either one of the input of the maintenance information to be transmitted to the management server device 20 or the output of the maintenance information to be received from the management server device 20; and an application managing unit 14c that performs uninstallation of the operation application unit 14b when a predetermined error condition is satisfied.SELECTED DRAWING: Figure 1

Description

The present invention relates to a portable terminal device for an equipment maintenance system, an equipment maintenance system, and an equipment maintenance program.

For example, in the maintenance activities of equipment used in factories and plants, workers inspect and repair each equipment individually, and the maintenance information related to the results is centrally managed by the management server device. There is. In recent years, with the spread of mobile terminal devices, workers are required to carry mobile terminal devices, and after preparing an access environment from the mobile terminal devices to the management server device, input / output of maintenance information on the mobile terminal devices can be performed. It has been proposed to enable renewal and the like (see, for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2014-146217 Japanese Unexamined Patent Publication No. 2018-156373

When operating a mobile terminal device that can access the management server device that manages equipment maintenance information at various locations on the premises such as factories and plants, there is a possibility that the mobile terminal device may be lost or stolen, and it may be caused by a malicious person. The risk of taking it out of the premises and unauthorized viewing due to cracking increases. That is, the operation of the mobile terminal device may lead to the leakage of confidential information such as maintenance information.

It is an object of the present invention to provide a technique that can sufficiently secure security when operating a mobile terminal device in an equipment maintenance system and is extremely useful in preventing leakage of confidential information and the like.

According to one aspect of the invention
It is a portable terminal device for an equipment maintenance system that is configured to be portable by a worker who maintains the equipment.
A communication unit that communicates with the management server device that manages the maintenance information of the equipment,
An operation application unit that inputs at least one of the maintenance information to be transmitted to the management server device and the maintenance information to be received from the management server device.
The application management unit that uninstalls the operation application unit when a predetermined error condition is met, and the application management unit.
A portable terminal device for an equipment maintenance system is provided.

Further, according to another aspect of the present invention.
A mobile terminal device configured to be portable by a worker who maintains the equipment,
A management server device that manages maintenance information for the equipment,
It is an equipment maintenance system equipped with
The mobile terminal device is
A communication unit that communicates with the management server device,
An operation application unit that inputs at least one of the maintenance information to be transmitted to the management server device and the maintenance information to be received from the management server device.
The application management unit that uninstalls the operation application unit when a predetermined error condition is met, and the application management unit.
Equipment maintenance system is provided.

Further, according to still another embodiment of the present invention.
A computer configured to be portable by a worker who maintains the equipment,
An operation application unit that inputs at least one of the maintenance information input to be transmitted to the management server device that manages the maintenance information of the equipment and the output of the maintenance information received from the management server device.
The application management unit that uninstalls the operation application unit when a predetermined error condition is met, and the application management unit.
A facility maintenance program is provided to function as.

According to the present invention, it is possible to sufficiently secure security when operating a mobile terminal device in an equipment maintenance system, and it is very useful in preventing leakage of confidential information and the like.

It is a block diagram which shows typically the example of the structure of the main part of the equipment maintenance system which concerns on one Embodiment of this invention. It is explanatory drawing which shows a specific example of the screen display in the mobile terminal apparatus which concerns on one Embodiment of this invention. It is explanatory drawing which shows the other specific example of the screen display in the mobile terminal apparatus which concerns on one Embodiment of this invention. It is explanatory drawing which shows typically the specific example of the use environment of the equipment maintenance system which concerns on one Embodiment of this invention. It is a flow chart (the 1) which shows the processing procedure of the monitoring sequence in the mobile terminal apparatus which concerns on one Embodiment of this invention. FIG. 2 is a flow chart (No. 2) showing a processing procedure of a monitoring sequence in a mobile terminal device according to an embodiment of the present invention. FIG. 3 is a flow chart (No. 3) showing a processing procedure of a monitoring sequence in a mobile terminal device according to an embodiment of the present invention. It is a flow diagram which shows the processing procedure of the management sequence in the mobile terminal apparatus which concerns on one Embodiment of this invention.

<One Embodiment of the present invention>
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(1) Configuration of Equipment Maintenance System First, the configuration of the equipment maintenance system according to the embodiment of the present invention will be described.
FIG. 1 is a block diagram schematically showing a configuration example of a main part of the equipment maintenance system according to the present embodiment.

The equipment maintenance system is a system configured to manage maintenance activities of equipment (not shown). The equipment corresponds to, for example, equipment installed in factories, plants, etc. (particularly production equipment), but is not limited to this, and any equipment requiring maintenance may be applicable. Maintenance includes inspection, maintenance, repair, repair, etc. of equipment. Maintenance activities shall be carried out by the workers responsible for the maintenance of the equipment.

For the management of such maintenance activities, as shown in FIG. 1, the equipment maintenance system has at least a mobile terminal device 10, a management server device 20, and a registered LAN (Local Area Network) that connects them in a communicable manner. ) 30 and. The equipment maintenance system may include components other than these.

The mobile terminal device 10 is configured to be portable by a worker who carries out maintenance activities of the equipment. In the illustrated example, one mobile terminal device 10 is shown, but a plurality of mobile terminal devices 10 may exist in the system. The details of the mobile terminal device 10 will be described later.

The management server device 20 centrally manages information on the results of equipment maintenance activities, that is, information obtained by the maintenance activities, as maintenance information in the system. Therefore, the management server device 20 is configured by a computer device capable of storing and storing various maintenance information, searching and outputting the maintenance information, and the like.

The registration LAN 30 is a communication line for establishing communication between the mobile terminal device 10 and the management server device 20, and may be wired or wireless. However, the registered LAN 30 is an electronic device (including a mobile terminal device 10 and a management server device 20) that is expected to be used in advance within a limited range such as in a factory or a plant premises, such as an in-house network. It is configured to establish communication only between.

(2) Configuration of Mobile Terminal Equipment for Equipment Maintenance System Next, the configuration of the mobile terminal device 10 used in the equipment maintenance system will be described.

The mobile terminal device 10 is an information electronic device that can be carried and carried by a worker who performs equipment maintenance activities, and is configured by, for example, a smartphone having a function as a small computer device. Here, the case where the mobile terminal device 10 is a smartphone is taken as an example, but the present invention is not limited to this, and other information electronic devices such as a tablet terminal and a PDA (Personal Digital Assistant) may be used. It doesn't matter.

The mobile terminal device 10 is configured to have at least functions as a communication unit 11, a GPS (Global Positioning System) unit 12, a camera unit 13, and a control unit 14.

The communication unit 11 is a function for communicating with the outside. The communication unit 11 communicates with the management server device 20 via, for example, the registration LAN 30. The communication performed by the communication unit 11 is mainly by wireless communication, but may be by wired communication.

The GPS unit 12 is a function of performing position recognition using a satellite positioning system. Hereinafter, the function of performing position recognition is also referred to as a GPS function.

The camera unit 13 is a function for capturing an image. The image to be captured may be a moving image or a still image.

The control unit 14 is a function for controlling the processing operation in the mobile terminal device 10. Therefore, the control unit 14 is configured by combining hardware resources such as a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like. Then, the control unit 14 specifically realizes information processing by the software by executing a predetermined program (software) installed in advance, so that the processing in the mobile terminal device 10 is performed. It is configured to control the operation.

Further, the control unit 14 is configured to have at least functions as a memory unit 14a, an operation application unit 14b, and an application management unit 14c.

The memory unit 14a stores and holds various programs, data, information, and the like.

The operation application unit 14b is a function realized by executing a predetermined application program among the programs stored in the memory unit 14a, and is managed via the communication unit 11 while following the operation of a worker who performs equipment maintenance activities. It processes the maintenance information exchanged with the server device 20. Specifically, the operation application unit 14b is configured to input maintenance information to be transmitted to the management server device 20 or output maintenance information received from the management server device 20, preferably at least one of them. There is. Further, the operation application unit 14b is configured to store maintenance information, information and data related thereto, and the like in the memory unit 14a as needed. The details of the maintenance information handled by the operation application unit 14b will be described later.

Similar to the operation application unit 14b, the application management unit 14c is a function realized by executing a predetermined application program among the programs stored and held by the memory unit 14a, and is a function realized by executing various applications (particularly, described above) in the mobile terminal device 10. It manages the operation application unit 14b). Specifically, the application management unit 14c is configured to uninstall the operation application unit 14b (specifically, the application program that realizes the operation application unit 14b) when a predetermined error condition is satisfied. .. Further, the application management unit 14c is configured to perform zero fill on the memory unit 14a when a predetermined error condition is satisfied. The details of a predetermined error condition that triggers (trigger) such as uninstallation will be described later.

Each predetermined application program that realizes these functions corresponds to one embodiment of the "equipment maintenance program". In that case, the equipment maintenance program shall be provided from the outside via the communication unit 11 and installed in the mobile terminal device 10 as a computer device.

(3) Specific Example of Maintenance Information Next, the maintenance information processed by the mobile terminal device 10 will be described with reference to specific examples.
2 and 3 are explanatory views showing a specific example of screen display in the mobile terminal device according to the present embodiment.

For example, in the equipment maintenance activity, the worker goes to the place where the equipment to be maintained is installed while carrying the mobile terminal device 10. Then, at the installation location, the mobile terminal device 10 is operated to activate the operation application unit 14b.

After starting the operation application unit 14b, the operator first operates the mobile terminal device 10 to access the equipment ledger managed by the management server device 20 in order to grasp the status of the equipment to be maintained. Specifically, for example, on the operation screen provided by the operation application unit 14b as shown in FIG. 2A, information for specifying equipment to be maintained is input, and the input information is input to the management server device 20. Send. In response to this, the management server device 20 transmits information regarding equipment specifications, drawings, equipment history, and the like for the equipment specified by the input information. As a result, the worker can browse the information on the equipment specifications, drawings, equipment history, etc. stored in the management server device 20 on the operation screen provided by the operation application unit 14b for the equipment to be maintained. .. Further, for example, on the operation screen provided by the operation application unit 14b as shown in FIG. 2B, information for searching the maintenance content for the equipment is input, and the input information is transmitted to the management server device 20. .. In response to this, history information corresponding to the search result is transmitted from the management server device 20. As a result, the worker can search and browse the history of maintenance contents for the equipment (for example, the contents of the past maintenance diary) on the operation screen provided by the operation application unit 14b for the equipment to be maintained. ..

That is, the operation application unit 14b receives equipment maintenance information (specifically, information on equipment specifications, drawings, equipment history, maintenance diary contents, etc.) received from the management server device 20 according to the operation contents by the operator. Output. Therefore, the worker can easily and appropriately obtain maintenance information for grasping the state of the equipment at the place where the equipment to be maintained is installed.

After properly grasping the condition of the equipment, maintenance activities such as inspection and repair of the equipment are carried out as necessary, and the worker who carried out the maintenance activity then operates the mobile terminal device 10. Enter information about the content of the conservation activities you have performed. Specifically, for example, an input screen for a maintenance diary as shown in FIG. 3A is provided to the operation application unit 14b, and information on the content of the maintenance activity performed is input on the input screen. Further, at this time, the screen transitions to the input screen as shown in FIG. 3 (b), and information related to the equipment history is input on the input screen, or an image (moving image or still) captured by the camera unit 13 is used. You may also upload the image). Then, various input information is transmitted to the management server device 20 in a state associated with the information that identifies the equipment on which the maintenance activity is performed. As a result, the information regarding the content of the maintenance activity by the worker is stored and stored in the management server device 20 and is centrally managed, and is utilized for the subsequent maintenance activity.

That is, the operation application unit 14b inputs the maintenance information of the equipment (specifically, the information related to the equipment history, the contents of the maintenance diary, etc.) to be transmitted to the management server device 20 according to the operation contents by the operator. Therefore, the worker can easily and appropriately input (record) the maintenance information that specifies the content of the maintenance activity performed on the equipment at the place where the equipment to be maintained is installed. Moreover, since the management server device 20 centrally manages the maintenance information input by the worker, the maintenance activity can be efficiently performed while effectively utilizing the maintenance information.

(4) Example of Processing Operation in Mobile Terminal Equipment for Equipment Maintenance System Next, an example of processing operation of the mobile terminal device 10 used in the equipment maintenance system will be described.

(Overview of processing operation)
As described above, the mobile terminal device 10 has a function as a small computer device that can be carried and carried in order to realize simple and appropriate maintenance activities. Therefore, the operation of the mobile terminal device 10 may lead to the leakage of confidential information such as maintenance information.

Therefore, in the present embodiment, in order to ensure sufficient security even when the mobile terminal device 10 is operated in the equipment maintenance system, the application management unit 14c is used in the mobile terminal device 10. The processing operation described below is performed.

Here, it is assumed that the equipment maintenance system is used in the following usage environment.
FIG. 4 is an explanatory diagram schematically showing a specific example of the usage environment of the equipment maintenance system according to the present embodiment.
As shown in FIG. 4, in the equipment maintenance system, the mobile terminal device 10 is communicably connected to the management server device 20 via the registration LAN 30. The registration LAN 30 is provided with a hub 31, a router 32, a firewall 33, and the like. Further, on the registered LAN 30, in addition to the management server device 20, a registered personal computer device 21 used in a factory office or the like (presumably used in advance) may exist.

When the equipment maintenance system is used in such a usage environment, the mobile terminal device 10 performs a monitoring sequence and a management sequence as processing operations.

(Monitoring sequence)
In the monitoring sequence, the application management unit 14c constantly monitors whether or not a predetermined error condition is satisfied. Typical examples of the predetermined error conditions include an error condition relating to the communication means and an error condition relating to the position recognition result.

Hereinafter, the processing procedure of the monitoring sequence including the determination of these error conditions will be specifically described.
5 to 7 are flow charts showing a processing procedure of a monitoring sequence in the mobile terminal device according to the present embodiment.

(Error conditions related to communication means)
First, the procedure of the processing operation including the determination of the error condition regarding the communication means will be described.

As shown in FIG. 5, the application management unit 14c monitors the presence or absence of connection to the carrier line provided by the communication carrier via the communication unit 11 of the mobile terminal device 10 (step 101, the following step is "S". It is abbreviated.). Then, when the connection to the carrier line is established (S101: YES), the application management unit 14c determines that one of the error conditions related to the communication means is satisfied, and the mobile terminal device 10 is operating normally. An abnormality determination to the effect that there is no abnormality is performed (S102), and the operating state of the mobile terminal device 10 is transitioned to a management sequence described later.

If there is no connection to the carrier line (S101: NO), then the application management unit 14c monitors whether or not the communication unit 11 of the mobile terminal device 10 is connected to the wireless LAN (S103). If there is no connection to the wireless LAN (S103: NO), the application management unit 14c further determines whether or not the communication unit 11 of the mobile terminal device 10 is connected to the wired LAN via a USB (Universal Serial Bus) connector or the like. Monitor (S104). If there is no connection to the wired LAN (S104: NO), then the application management unit 14c monitors whether or not there is a connection to the registered LAN 30 within a certain period after the operation application unit 14b is started (S105). Then, if there is no connection to the registered LAN 30 within a certain period (S105: no period), the application management unit 14c determines that one of the error conditions related to the communication means is satisfied, and the mobile terminal device 10 is normal. An abnormality determination is performed to the effect that the mobile terminal device 10 is not being operated (S106), and the operating state of the mobile terminal device 10 is transitioned to a management sequence described later.

When the connection to the wireless LAN is established (S103: YES) or the connection to the wired LAN is established (S104: YES), the application management unit 14c can use the LAN in which the connection established LAN is registered (that is, the LAN). It is determined whether or not it is a registered LAN 30) or whether or not it is connected to the registered LAN 30 (S107). If the LAN is unrelated to the registered LAN 30 (S107: NO), the application management unit 14c determines that one of the error conditions related to the communication means is satisfied, and the mobile terminal device 10 is operating normally. An abnormality determination to the effect that there is no abnormality is performed (S108), and the operating state of the mobile terminal device 10 is transitioned to a management sequence described later.

When there is a connection to the registered LAN 30 within a certain period after the operation application unit 14b is started (S105: within the period), or when the LAN for which the connection is established is the registered LAN 30 or related to it (S107). : YES), the application management unit 14c determines whether the mobile terminal device 10 is normally operated in the equipment maintenance system (S109), and continues the operation state.

When a series of processing operations including determination of the above error conditions are performed, in the equipment maintenance system used in the usage environment shown in FIG. 4, the mobile terminal device 10 is, for example, a wide area network such as the Internet through the carrier line 41. When connecting to the line 42 or connecting to a LAN other than the registered LAN 30, an abnormality is determined. That is, since the communication other than the registered LAN 30 is performed by an unexpected communication means, when the communication is established, the application management unit 14c determines that the error condition relating to the communication means is satisfied.

Further, as the communication unit 11 of the mobile terminal device 10, short-range wireless communication technology represented by Bluetooth (registered trademark), non-contact wireless communication technology represented by NFC (Near field communication), etc. There is a corresponding one. However, the communication by these also corresponds to the communication by an unexpected communication means other than the registered LAN 30.

For this reason, the application management unit 14c also performs the processing operation of the following procedure in addition to the series of processing operations described above.
As shown in FIG. 6, in the communication unit 11 of the mobile terminal device 10, the application management unit 14c is in a state (that is, communication) in which the communication function by the short-range wireless communication technology represented by Bluetooth (registered trademark) is ON (that is, communication). It is determined whether or not the state is possible (S201). If it is not in the ON state (S201: OFF), is the application management unit 14c in the ON state (that is, the communicable state) of the communication function by the non-contact wireless communication technology represented by NFC? It is determined whether or not (S202).

If any of these communication functions is in the ON state (S201: ON, S202: ON), the application management unit 14c determines that one of the error conditions related to the communication means is satisfied, and the mobile terminal device 10 is normal. An abnormality determination is performed to the effect that the mobile terminal device 10 is not being operated (S203), and the operating state of the mobile terminal device 10 is transitioned to a management sequence described later. On the other hand, if none of these communication functions are in the ON state (S201: OFF, S202: OFF), the application management unit 14c determines whether the mobile terminal device 10 is normally operated in the equipment maintenance system. (S204) to continue the operating state.

When a series of processing operations including determination of the above error conditions are performed, in the equipment maintenance system used in the usage environment shown in FIG. 4, the mobile terminal device 10 is, for example, short-range wireless communication technology or non-contact wireless. When connecting to an unregistered personal computer device 43 or connecting to another unregistered information mobile terminal 44 through a communication function by communication technology or the like, an abnormality determination is made. That is, since the communication by the short-range wireless communication technology, the non-contact wireless communication technology, etc. is the communication by the unexpected communication means, when the communication is established, the application management unit 14c determines that the error condition regarding the communication means is satisfied. It will be.

(Error condition related to position recognition result)
Subsequently, the procedure of the processing operation including the determination of the error condition regarding the position recognition result will be described.

As shown in FIG. 7, the application management unit 14c determines whether or not the GPS function by the GPS unit 12 of the mobile terminal device 10 is on (ON) state (that is, a state in which position recognition can be performed). Judgment (S301). If it is not in the ON state (S301: OFF), the application management unit 14c instructs the GPS unit 12 to turn on the GPS function (S302), and the number of retries is N times (S302). N is a natural number) (S303: N times or less), and the success or failure of the activation of the GPS function by the GPS unit 12 is determined (S304).

If the GPS function is not enabled even if the number of retries exceeds N times (S304: failure, S303: exceeds N times), the GPS function by the GPS unit 12 remains OFF in the application management unit 14c. , It is determined that one of the error conditions related to the position recognition result is satisfied, an abnormality determination is performed to the effect that the mobile terminal device 10 is not operating normally (S305), and the operating state of the mobile terminal device 10 is described later. Transition to the management sequence to be performed.

When the GPS function by the GPS unit 12 is on (S301: ON), or when the GPS function is enabled before the number of retries exceeds N times (S304: success), the application management unit 14c is the GPS unit. Using the GPS function of 12, an attempt is made to acquire GPS information which is a recognition result of the position where the mobile terminal device 10 exists (S306).

When the acquisition of GPS information fails (S306: failure), the application management unit 14 determines the GPS information within the range where the number of failures does not exceed a predetermined N times (N is a natural number) (S307: less than N times). The acquisition is repeatedly attempted (S306). When the number of failures is N or more (S307: N or more), the application management unit 14 executes a sequence for monitoring the LAN connection (S308), and determines whether or not there is an abnormality in the LAN connection by the communication unit 11. (S309). As a result, if the LAN connection by the communication unit 11 is normal (S309: normal) such as when connected to the registered LAN 30, the application management unit 14 may not be able to acquire GPS information by the GPS unit 12. Since the mobile terminal device 10 exists in a range assumed in advance (for example, a limited range such as a factory or a plant premises), it is determined that the mobile terminal device 10 is operating normally (S310). The operating state of the mobile terminal device 10 is transitioned to a management sequence described later. On the other hand, if there is an abnormality in the LAN connection by the communication unit 11 (S309: abnormality), the application management unit 14 determines that the mobile terminal device 10 is not operating normally (S311), and the mobile terminal device 10 is not operating normally. The operating state of the terminal device 10 is transitioned to a management sequence described later.

When the acquisition of GPS information is successful (S306: success), the application management unit 14c is limited to the range in which the operation of the mobile terminal device 10 is expected in advance (for example, in the premises of a factory, a plant, etc.). It is determined whether or not the location of the mobile terminal device 10 is within the range of the GPS coordinates by comparing with the GPS coordinates that specify the range) (S312).

If the location of the mobile terminal device 10 is within the range of GPS coordinates (S312: within the range), the application management unit 14c determines whether the mobile terminal device 10 is normally operated in the equipment maintenance system. (S313), the operating state of the mobile terminal device 10 is changed to a management sequence described later.

On the other hand, if the location of the mobile terminal device 10 is not within the range of GPS coordinates (S312: out of range), the application management unit 14c has a range in which the number of retries does not exceed a predetermined N times (N is a natural number). (S314: N times or less), acquisition of GPS information and comparison with GPS coordinates are repeated. If the location of the mobile terminal device 10 is not within the range of GPS coordinates even if the number of retries exceeds N times (S314: exceeds N times), the application management unit 14c is one of the error conditions related to the position recognition result. It is determined that one of the above is true, an abnormality determination is made to the effect that the mobile terminal device 10 is not operating normally (S315), and the operating state of the mobile terminal device 10 is transitioned to a management sequence described later.

When a series of processing operations including determination of the above error conditions are performed, in the equipment maintenance system used in the usage environment shown in FIG. 4, the mobile terminal device 10 is limited to, for example, the premises of a factory or a plant. If it is taken out of the range 45, an abnormality is determined. That is, since the outside of the range 45 is an unexpected place outside the range defined by the GPS coordinates, when the mobile terminal device 10 is recognized in the unexpected place, the application management unit 14c recognizes the position. It will be determined that the error condition related to the result is satisfied.

(Other error conditions)
In the processing operation example described above, as typical predetermined error conditions, an error condition related to the communication means and an error condition related to the position recognition result have been described. However, the predetermined error conditions are not limited to these, and may be as follows.

For example, in the equipment maintenance system, the time zone in which the mobile terminal device 10 is operated is within the working hours of the worker, the operating time of the equipment, the working time reserved for the maintenance of the equipment, and the like in advance. It is generally within the specified time zone. From this, the application management unit 14c states that communication via the communication unit 11 is established in an unexpected time zone outside the predetermined time zone, or that there is an operation in the operation application unit 14b in the time zone. , It may be determined that the error condition related to the time zone, which is one of the predetermined error conditions, is satisfied.

Further, for example, in the equipment maintenance activity, the worker is assigned the equipment in charge of maintenance in advance, and operates the operation application unit 14b in the vicinity of the place where the equipment is installed to input / output information. Is common. That is, the worker operates the contents or procedures presumed in advance by the operation application unit 14b at a place presumed in advance within the range of normal system operation. For this reason, the application management unit 14c corresponds to an error condition related to an operation, which is one of the predetermined error conditions, when at least one of the operation location, operation content, and operation procedure of the operation application unit 14b is an unexpected operation. It may be determined that it has been done.

Further, the function of the mobile terminal device 10 as the camera unit 13 makes it possible to upload an image (moving image or still image) as maintenance information, which is very useful for enhancing the content of the maintenance information. However, use outside the range expected in normal maintenance activities may lead to leakage of confidential information. From this, if the function as the camera unit 13 is activated when the application management unit 14c is not in a place or time zone expected in advance, the camera unit 13 is used in an unexpected place or time zone. , It may be determined that the error condition related to the camera function, which is one of the predetermined error conditions, is satisfied.

The application management unit 14c constantly monitors at least one, preferably a plurality of, the above-mentioned predetermined error conditions in the monitoring sequence, and determines whether or not the conditions are met. Then, when it is determined that the predetermined error condition is satisfied, a signal output to that effect is output and the process proceeds to the management sequence.

(Management sequence)
In addition to the monitoring sequence as described above, the application management unit 14c performs a management sequence.
FIG. 8 is a flow chart showing a processing procedure of a management sequence in the mobile terminal device according to the present embodiment.

In the management sequence, the application management unit 14c first requests the determination result in the monitoring sequence (S402), and determines whether or not there is a signal output indicating that the predetermined error condition is satisfied (S402). As a result, if there is no signal output from the monitoring sequence (S402: OFF), the application management unit 14c makes a normal determination that the mobile terminal device 10 is operating normally in the equipment maintenance system (S403). , Continue its operational status.

On the other hand, when it is determined that there is a signal output from the monitoring sequence (S402: ON), the application management unit 14c determines that X (X is an arbitrary value set in advance, for example, within the range of 0.001 to 10). Data deletion processing is performed after (one of the values) seconds (S404).

Specifically, the application management unit 14c uninstalls the operation application unit 14b (specifically, the application program that realizes the operation application unit 14b) as the data deletion process, and from the memory unit 14a in the mobile terminal device 10. delete. Therefore, after the operation application unit 14b is uninstalled, the operation application unit 14b cannot be started in the mobile terminal device 10, and the operation application unit 14b cannot be operated to access the management server device 20.

Further, the application management unit 14c performs zero fill on the memory unit 14a as a data deletion process. That is, the application management unit 14c writes zero data to the sector of the memory unit 14a. Therefore, after the memory unit 14a is zero-filled, for example, in the process of maintenance activity, the operation application unit 14b stores the maintenance information and related information and data (including cache data) in the memory unit 14a as needed. Even when the information or data is retained, the information or data is completely erased from the memory unit 14a, so that the information or data cannot be read from the memory unit 14a.

When the application management unit 14c executes the management sequence as described above, the mobile terminal device 10 accesses the management server device 20 when an unexpected operation corresponding to a predetermined error condition occurs. In addition, it becomes impossible to read information, data, or the like from the memory unit 14a. Therefore, it is possible to sufficiently secure security when an unexpected operation is performed, and it is very useful in preventing leakage of confidential information and the like.

(5) Effects obtained by the present embodiment According to the present embodiment, one or more of the following effects can be obtained.

(A) In the present embodiment, in the maintenance activity of the equipment, the worker operates the operation application unit 14b of the mobile terminal device 10 to output the maintenance information received from the management server device 20 or the management server device. Input the maintenance information to be transmitted to 20. That is, the worker searches for and browses equipment maintenance information (specifically, information on equipment specifications, drawings, equipment history, maintenance diary contents, etc.) on the operation screen provided by the operation application unit 14b. This makes it possible to easily and appropriately obtain the necessary maintenance information. In addition, the worker can input the maintenance information of the equipment (specifically, the information related to the equipment history, the contents of the maintenance diary, etc.) on the operation screen provided by the operation application unit 14b, and the equipment is performed. You will be able to input (record) the contents of maintenance activities easily and appropriately. Therefore, according to the present embodiment, it becomes possible to efficiently carry out maintenance activities while effectively utilizing maintenance information.

(B) In the present embodiment, the application management unit 14c constantly monitors whether or not the predetermined error condition is met, and uninstalls the operation application unit 14b when the predetermined error condition is met. It has become. That is, in the mobile terminal device 10, the operation application unit 14b is uninstalled when an unexpected operation corresponding to a predetermined error condition occurs, and then the operation application unit 14b cannot be started and the operation is performed. It also becomes impossible to access the management server device 20 by operating the application unit 14b. Therefore, according to the present embodiment, it is possible to sufficiently secure the security of the mobile terminal device 10 when it is operated unexpectedly, and it is very useful in preventing the leakage of confidential information and the like.

(C) In the present embodiment, the application management unit 14c constantly monitors whether or not a predetermined error condition is met, and when the predetermined error condition is met, zero fill is performed for the memory unit 14a. ing. That is, in the mobile terminal device 10, a zero fill is performed on the memory unit 14a when an unexpected operation corresponding to a predetermined error condition occurs, and then the maintenance information in the memory unit 14a and related to the maintenance information are performed. It becomes impossible to read the information and data to be stored. Therefore, according to the present embodiment, it is possible to sufficiently secure the security of the mobile terminal device 10 when it is operated unexpectedly, and it is very useful in preventing the leakage of confidential information and the like.

(D) In the present embodiment, when communication by an unexpected communication means is established, the application management unit 14c determines that the error condition relating to the communication means is satisfied. Therefore, according to the present embodiment, it is possible to effectively prevent communication by an unexpected communication means that may lead to leakage of confidential information, which is very useful for ensuring sufficient security.

(E) In the present embodiment, when the GPS function recognizes that the mobile terminal device 10 is located in an unexpected place, the application management unit 14c determines that the error condition regarding the position recognition result is satisfied. .. Therefore, according to the present embodiment, it is possible to effectively prevent the mobile terminal device 10 from being taken out, which may lead to the leakage of confidential information, which is very useful for ensuring sufficient security.

(F) In the present embodiment, when communication via the communication unit 11 is established in an unexpected time zone, or when there is an operation in the operation application unit 14b in the time zone, the application management unit 14c relates to the time zone. It is designed to determine that the error condition is met. Therefore, according to the present embodiment, it is possible to effectively prevent the use of the mobile terminal device 10 outside the estimated time that may lead to the leakage of confidential information, which is very useful for ensuring sufficient security. be.

(G) In the present embodiment, if at least one of the operation location, operation content, and operation procedure of the operation application unit 14b is an unexpected operation, the application management unit 14c determines that the error condition related to the operation is satisfied. It has become. Therefore, according to the present embodiment, it is possible to effectively prevent an unexpected operation on the mobile terminal device 10 that may lead to leakage of confidential information, which is very useful for ensuring sufficient security. ..

(H) In the present embodiment, if the function as the camera unit 13 is activated when the location or time zone is not expected in advance, the camera unit 13 is used in an unexpected location or time zone. The application management unit 14c is designed to determine that the error condition related to the camera function is satisfied. Therefore, according to the present embodiment, it is possible to effectively prevent the unexpected use of the camera unit 13 which may lead to the leakage of confidential information, which is very useful for ensuring sufficient security.

(6) Modifications and the like Although one embodiment of the present invention has been specifically described above, the present invention is not limited to the above-described embodiment and can be appropriately modified without departing from the gist thereof.

For example, in the above-described embodiment, various error conditions are exemplified as predetermined error conditions, but if it is useful for ensuring security, error conditions other than these may be applied. Further, it is preferable that the application management unit 14c constantly monitors all of these various error conditions, but it is not always necessary, and it is sufficient to monitor at least one error condition. Further, it is preferable that the monitoring by the application management unit 14c is always performed, but it is not always necessary, and it may be performed at predetermined timing intervals (for example, at regular intervals).

Further, for example, in the above-described embodiment, when a predetermined error condition is satisfied, the case where both the operation application unit 14b is uninstalled and the memory unit 14a is zero-filled is given as an example, but the present invention is not necessarily limited to this. At least, the operation application unit 14b may be uninstalled. Even in that case, it is possible to sufficiently secure the security when the mobile terminal device 10 is operated unexpectedly.

10 ... mobile terminal device, 11 ... communication unit, 12 ... GPS unit, 13 ... camera unit, 14 ... control unit, 14a ... memory unit, 14b ... operation application unit, 14c ... application management unit, 20 ... management server device, 21. ... personal computer device, 30 ... registered LAN, 31 ... hub, 32 ... router, 33 ... firewall, 41 ... carrier line, 42 ... wide area network line, 43 ... unregistered personal computer device, 44 ... unregistered information mobile terminal , 45 ... Range

Claims (9)

It is a portable terminal device for an equipment maintenance system that is configured to be portable by a worker who maintains the equipment.
A communication unit that communicates with the management server device that manages the maintenance information of the equipment,
An operation application unit that inputs at least one of the maintenance information to be transmitted to the management server device and the maintenance information to be received from the management server device.
The application management unit that uninstalls the operation application unit when a predetermined error condition is met, and the application management unit.
A portable terminal device for equipment maintenance systems. The mobile terminal device for an equipment maintenance system according to claim 1, wherein the application management unit performs zero fill for the memory function of the mobile terminal device for the equipment maintenance system when the error condition is satisfied. The mobile terminal device for an equipment maintenance system according to claim 1 or 2, wherein the application management unit determines that the error condition is satisfied when communication by an unexpected communication means is established. When the application management unit recognizes that the position recognition function of the mobile terminal device for the equipment maintenance system is in an unexpected location, it determines that the error condition is satisfied, according to any one of claims 1 to 3. The mobile terminal device for the equipment maintenance system described. Any one of claims 1 to 4 in which the application management unit determines that the error condition is satisfied when communication is established in an unexpected time zone or when there is an operation in the operation application unit in the time zone. The portable terminal device for the equipment maintenance system according to item 1. The mobile terminal for an equipment maintenance system according to any one of claims 1 to 5, wherein the application management unit determines that the error condition is satisfied when the operation in the operation application unit is an unexpected operation. Device. The item according to any one of claims 1 to 6, wherein the application management unit determines that the error condition is satisfied when the camera function of the mobile terminal device for the equipment maintenance system is activated at an unexpected place or time zone. Mobile terminal equipment for equipment maintenance systems. A mobile terminal device configured to be portable by a worker who maintains the equipment,
A management server device that manages maintenance information for the equipment,
It is an equipment maintenance system equipped with
The mobile terminal device is
A communication unit that communicates with the management server device,
An operation application unit that inputs at least one of the maintenance information to be transmitted to the management server device and the maintenance information to be received from the management server device.
The application management unit that uninstalls the operation application unit when a predetermined error condition is met, and the application management unit.
Equipment maintenance system equipped with. A computer configured to be portable by a worker who maintains the equipment,
An operation application unit that inputs at least one of the maintenance information input to be transmitted to the management server device that manages the maintenance information of the equipment and the output of the maintenance information received from the management server device.
The application management unit that uninstalls the operation application unit when a predetermined error condition is met, and the application management unit.
Equipment maintenance program to function as.

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