JP2000253462A - Monitor and control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to sharply shorten receiving time by selecting only necessary information in the case of providing information from a central monitor and control device to a monitoring terminal equipment and to sharply shorten time to be required up to the grasp of information contents. SOLUTION: When a monitoring terminal equipment 2 is operated and a radio signal including an information request signal is transmitted from a PHS telephone set 3, the information request signal is supplied to a central monitor and control device 7 through a route consisting of a PHS base station 4, a public line 5 and a MODEM device 6, the device 7 checks whether receiving base station information is included in the information request signal or not, selects information suitable for an area in which the equipment 2 exists on the basis of the checked result, and supplies the selected information to the equipment 2 to allow a monitoring operator to monitor and control processes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring and control system for monitoring and controlling a process to be monitored by using a portable terminal device as a part of the system.

[0002]

2. Description of the Related Art In recent years, radio base stations have been provided in major cities and municipalities, and accordingly, it has become possible to use mobile phones in these major cities and municipalities. Under such circumstances, “Mobile phone and location information management system using the same” disclosed in JP-A-5-167704, “Mobile communication system” disclosed in JP-A-6-276566, and "Button telephone apparatus" disclosed in Japanese Unexamined Patent Application Publication No.
A cellular phone is increasingly used as a part of a system, such as a "mobile phone alerting device and a cellular phone alerting system" disclosed in Japanese Patent Application Publication No. 9-09.

[0003] That is, in the "mobile telephone and the location information management system using the same" disclosed in Japanese Patent Application Laid-Open No. 5-167704, each employee receives the identification number from the radio relay station by the mobile telephone carried by the employee. By transmitting the identification number to the information receiver using a general subscriber telephone network or an ISDN line, etc., and allowing the information receiver to know the current position of each employee, the information receiver can know the current position of each employee using the mobile phone. Let me grasp.

In a "mobile communication system" disclosed in Japanese Patent Application Laid-Open No. Hei 6-276566, one mobile base station calls another mobile base station, and the called mobile base station is on a call or turned off. When a call cannot be made because of a call, the number of the wireless zone where the called mobile base station exists is displayed on the calling mobile base station by the call path switch, and the calling user becomes a communication partner with the calling user. It informs the location of the mobile base station so that the user carrying the mobile base station with which he / she is communicating can be determined whether or not it is nearby. Let it.

In the "key telephone apparatus" disclosed in Japanese Patent Application Laid-Open No. 9-322255, when a position is registered in a key telephone main equipment from a portable telephone terminal via a wireless base station, a public network, and a location registration notification outside line. When the key telephone equipment is called from the mobile telephone terminal via a wireless base station, a public network, and an outside line to be transferred, the key telephone equipment enables the transfer of voice signals and the like to the mobile telephone terminal. By establishing a communication line between the mobile phone terminals and starting the transfer of the voice signal from the transfer phone device, the search processing of the wireless base station and the switching of the wireless base station during the transfer of the voice signal and the like. Avoid interruption of the audio signal due to processing, transfer error, etc.

[0006] Further, in the "mobile phone alerting device and mobile phone alerting system" disclosed in Japanese Patent Application Laid-Open No. H8-307539, an output is provided from an electronic exchange such as a wireless base station for transmitting and receiving radio waves to and from a mobile phone. The location of each mobile phone is registered in the storage device of the mobile phone notification device using the wireless base station number, etc., and some abnormality occurs in the managed building, etc. When an ID code or the like indicating the position where the error occurred is output and this is input to the mobile phone notification device,
The storage device is accessed by a computer provided in the mobile phone notification device, a mobile phone closest to the position indicated by the ID code is selected, and a modem having a voice transmission function unit is selected based on the selection result. By controlling and calling the selected mobile phone and notifying the person carrying this mobile phone of the nature of the abnormality, when any abnormality occurs in any of the buildings, the cell phone of a person near this building Call the phone and rush to the building where the problem occurred.

[0007]

By the way, in recent years, the amount of information that must be managed by the system has become enormous, and a centrally located host computer device or the like is used by using a portable telephone or the like whose transmission speed is limited. When required information is transmitted from a company, the time required for receiving the information increases year by year, and it is becoming difficult to provide all employees with all information used in the system in a limited time.

Further, each employee has a problem that even if all the information is provided, the employee must select and use necessary information from the information.

On the other hand, conventionally developed systems have a function of grasping the position of an employee carrying a mobile phone or the like, selecting an employee at the most optimal location, and causing a transfer error. Since it has only a function to transfer audio signals, etc., it provides only necessary information to each employee within a limited time, and it is possible to grasp the place where the abnormality occurred, grasp the details of the abnormality, etc. There was a problem that the required time could not be shortened.

In addition, using such a mobile phone,
In a system in which information is provided from a centrally located host computer, there is a risk that a third party who has a mobile phone may intentionally call the host computer and download the information. For security reasons, it was strongly required to take some measures.

In view of the above circumstances, according to the present invention, when information is provided from a host computer device or the like using a portable telephone, only the necessary information is provided. Dramatically shorten the time required to receive the information and the time required to grasp the contents of the provided information, so that the monitoring work and repair work indicated by the information can be started early. The purpose of the present invention is to provide a monitoring and control system that can perform the monitoring.

According to the present invention, when the host computer is called from the mobile phone, it is determined whether or not the mobile phone satisfies a preset condition. It is another object of the present invention to provide a monitoring and control system capable of dramatically improving system security by providing information.

According to a third aspect of the present invention, a supervisory control system capable of providing appropriate information to each portable telephone while reducing a system construction cost by using a radio base station provided by a telephone company. It is intended to provide.

[0014]

In order to achieve the above object, according to the present invention, according to a first aspect of the present invention, a process to be monitored is performed by using a portable terminal device carried by a supervisor as a part of a system. In a monitoring control system that performs monitoring control, when there is a request for information from the portable terminal device,
Based on the base station number of the wireless base station that relayed this request,
A central monitoring and control device is provided for selecting information optimal for a place where the portable terminal device is located and supplying the selected information to the portable terminal device via the wireless base station.

According to a second aspect of the present invention, in a monitoring control system for monitoring and controlling a process to be monitored by using a portable terminal device carried by a supervisor as a part of a system, a request for information from the portable terminal device is provided. At some time, based on the base station number of the wireless base station that relayed this request, the access right assigned to the place where the portable terminal device is located is grasped, and the information requested within the range of this access right is obtained. A central monitoring and control device for selecting and supplying this to the portable terminal device via the wireless base station is provided.

According to a third aspect, in the monitoring and control system according to any one of the first and second aspects, the wireless base station includes:
A PHS base station for receiving a request for information in the form of a wireless signal, wherein the portable terminal device outputs the request for information in the form of a wireless signal using a PHS telephone.

According to the above configuration, when a request for information is received from the portable terminal device, the information is transmitted based on the base station number of the wireless base station that relays the request from the portable terminal device.
The central monitoring and control device selects the optimum information for the place where the mobile terminal device is located, and supplies this to the mobile terminal device via the wireless base station. In this way, when information is provided from the central monitoring and control device using the portable terminal device, only the necessary information is provided, thereby greatly reducing the time required for receiving the necessary information. At the same time, the time required to grasp the contents of the provided information is drastically shortened, and the monitoring work, the repair work, and the like specified by the information are started early.

According to a second aspect of the present invention, when there is a request for information from the portable terminal device, the central monitoring and control device places the portable terminal device on the basis of the base station number of the wireless base station that relayed the request from the portable terminal device. Know the access rights assigned to the location where they are located, and within this access right,
The requested information is selected and supplied to the portable terminal device via the wireless base station. In this way, when the central monitoring and control device is called from the mobile terminal device, it is determined whether or not the mobile terminal device satisfies a preset condition, and only when the preset condition is satisfied, Providing information, thereby dramatically improving the security of the system.

In the third aspect, the PH as the portable terminal device is set.
The SHS telephone outputs a request for information in the form of a radio signal, while the PHS base station receives the request for information from the PHS telephone as a wireless base station. And provide appropriate information.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> FIG. 1 is a block diagram showing an embodiment of a supervisory control system according to the present invention.

The monitoring control system 1 shown in FIG. 1 is a monitoring portable terminal device 2 carried by each observer, a PHS telephone 3 connected to the portable terminal device 2, and a PHS installed by a telephone company. A PHS base station 4 for exchanging radio signals with the telephone 3 and a communication line with the PHS base station 4 via a public line 5 arranged in a central monitoring room and installed by the telephone company to exchange information. And a central monitoring and control device 7 disposed in a central monitoring room or the like and exchanging information with the monitoring terminal device 2 via the modem device 6, the public line 5, the PHS base station 4, and the PHS telephone 3. And

In the monitoring and control system 1, the central monitoring and control device 7 collects operation information and the like from each process (each process such as a plant to be monitored) connected to a LAN (not shown). Based on the operation information, control information is output on the LAN to control each process. Further, the monitoring terminal device 2 is operated, and a request instruction for information necessary for monitoring and controlling each process is input,
A radio signal including an information request signal is transmitted from the PHS telephone 3 and received by the PHS base station 4, and the information request signal is supplied to the central monitoring and control device 7 via the public line 5 and the modem device 6 sequentially. Then, the central monitoring and control device 7 checks whether or not the information request signal contains the reception base station information. Based on the check result, the database is accessed and the area where the monitoring terminal device 2 is located is located. Information that is suitable for the monitoring terminal device 2 via the route of the modem device 6, the public line 5, the PHS base station 4, the PHS telephone 3, and the monitoring terminal device 2.
To make the supervisor monitor and control the process.

Next, the operation of the monitoring control system 1 will be described in detail with reference to the flowchart shown in FIG.

First, when the central supervisory control device 7 is operated and a supervisory control start instruction is input, the central supervisory control device 7 controls the LAN, and processes connected to the LAN (the processes to be monitored and the Process such as a plant) is sequentially selected, and outputs (detection information) of each sensor constituting the process, operation information indicating an operation state of the process, and the like are collected.
The operating status of each process, the presence or absence of an abnormality, and the like are determined based on the operating information and the like, and control information is output on the LAN based on the determination result to control each process.

In parallel with these operations, the monitoring terminal 2 is operated by a monitoring person to monitor each process,
When an instruction requesting information required for control is input, a call signal necessary for calling the modem device by the monitoring terminal device 2, a telephone number assigned to the modem device 6, and monitoring and control of each process. An information request signal for requesting necessary information is generated, and the PHS telephone 3 transmits a radio signal including a call signal, a telephone number, and an information request signal.

When a radio signal is received by the PHS base station 4 whose transmission / reception area is the location where the PHS telephone 3 is located, the PHS base station 4 transmits the radio signal.
A wireless communication line with the S telephone 3 as a communication partner is established, a modem device 6 is called via the public line 5, and when the modem device 6 responds, a communication line with the modem device 6 as a communication partner. Is established, and information including the number of the own PHS base station 4 (base station number) and the information request signal is centrally monitored through the PHS base station 4 → public line 5 → modem device 6 → central monitoring control device 7. It is supplied to the control device 7 (step ST1).

Next, the central supervisory control unit 7 checks whether or not the information includes the base station number. When the information includes the base station number (step ST2), the modem unit 6 receives the information. Information request signal is P
After it is determined that the received signal is the information request signal received by the HS base station 4, any one of the areas where the base station number is set in advance, that is, any of the areas where the processes to be monitored exist, is transmitted and received. It is checked whether it is the base station number of the PHS base station to be the area.

Then, when the base station number received by the modem device 6 is the base station number of the PHS base station 4 whose transmission / reception area is the area where any of the processes exists (step ST3), the central monitoring control device 7, a database is accessed, and detection information, operation information, abnormality presence / absence information, and the like necessary for monitoring and controlling processes in the area corresponding to the base station number are selected. Equipment 6 → Public line 5 → PHS
The information is supplied to the monitoring terminal device 2 that has issued the information request through the base station 4 → PHS telephone 3 → monitoring terminal device 2, and the monitoring terminal device 2 is transmitted in a format such as a screen display format or a voice output format. It is presented to the carrying guard (step ST4).

As a result, detection information, operation information, abnormality presence / absence information, and the like of the nearest process are grasped by the observer, and the process is monitored and controlled based on the grasped contents.

For example, when an information request is input by a supervisor while the monitoring terminal device 2 is placed in front of a pump or the like constituting a process to be monitored and controlled,
Information such as the operation history and operation information of the pump is supplied from the central monitoring and control device 7, and the information is displayed on a screen. Necessary information is selected from among these pieces of information, and the detailed contents are displayed.

After that, before a predetermined time set in advance, the monitoring terminal device 2 is operated by the monitoring person, and an information request signal for requesting new information from the monitoring terminal device 2 is output. This is the monitoring terminal device 2 → PH
The S telephone 3 → PHS base station 4 → public line 5 → modem device 6 → central supervisory control device 7 Each time the central supervisory control device 7 is supplied (step ST5), the central supervisory control device 7 makes a database. Is accessed and the information requested by the information request signal is selected, and this is selected from the central monitoring and control device 7 → the modem device 6 → the public line 5 → the PHS base station 4
It is supplied to the monitoring terminal device 2 that has issued the information request through the path of the PHS telephone 3 → the monitoring terminal device 2 and carries the monitoring terminal device 2 in a form such as a screen display format or a sound output format. The detailed contents of the process are presented to the monitoring person (step ST6).

When a predetermined period of time has elapsed since the information was provided to the monitoring terminal device 2 (step ST5), the central monitoring control device 7 controls the monitoring terminal device 2 It is determined that the information request has been completed, an on-hook process is performed, and the communication line to the monitoring terminal device is disconnected (step ST7).

When the information received by the modem device 6 is not included in the base station number (step ST
2) The central monitoring control device 7 determines that the currently supplied paging signal is a paging signal from a source other than the PHS base station 4. Even if the base station number is included in the information, if the base station number is not the base station number of the PHS base station 4 whose transmission / reception area is a preset area (step ST3), the central monitoring control is performed. The device 7 determines that the monitoring terminal device 2 is located outside of each area corresponding to each process.

When such a determination result is obtained, the database is accessed by the central monitoring and control device 7 based on preset selection conditions, and necessary for monitoring and controlling each process. General detection information, operation information, and the like are selected, which are central monitoring control device 7 → modem device 6 → public line 5 → PHS base station 4 → PH
It is supplied to the monitoring terminal device 2 that has issued the information request through the route of the S telephone 3 → the monitoring terminal device 2, and carries the monitoring terminal device 2 in a form such as a screen display format or a sound output format. It is presented to the observer (step ST8).

Thereafter, before the predetermined time which has been set in advance elapses, the monitoring terminal device 2 is operated by the monitoring person, and an information request signal for requesting new information from the monitoring terminal device 2 is transmitted. Output and this is the monitoring terminal device 2 → P
The HS telephone 3 → PHS base station 4 → public line 5 → modem device 6 → central supervisory control device 7 Each time the central supervisory control device 7 is supplied (step ST9), the central supervisory control device 7 The database is accessed, and the information requested by the information request signal is selected, and this is selected from the central supervisory control device 7 → modem device 6 → public line 5 → PH.
This monitoring terminal device is supplied to the monitoring terminal device 2 that has issued the information request through the route of the S base station 4 → the PHS telephone 3 → the monitoring terminal device 2 and has a format such as a screen display format and a voice output format. 2 is presented with the detailed contents of the process to the monitoring person carrying 2 (step ST10).

When a predetermined period of time has elapsed since the information was provided to the monitoring terminal device 2 (step ST 9), the central monitoring and control device 7 controls the monitoring terminal device 2. It is determined that the information request has been completed, an on-hook process is performed, and the monitoring terminal device 2
Is disconnected (step ST11).

As described above, in the first embodiment, the monitoring terminal device 2 is operated to input an instruction requesting information necessary for monitoring and controlling each process, and an information request signal is transmitted from the PHS telephone 3. Is transmitted by the PHS base station 4 and received by the PHS base station 4. When the information request signal is supplied to the central supervisory control device 7 via the public line 5 and the modem device 6 sequentially, the central supervisory control The device 7 checks whether the information base station information is included in the information request signal, and based on the check result, selects information suitable for the area where the monitoring terminal device 2 is located. Modem device 6, Public line 5, PH
S-station 4, PHS telephone 3, and monitoring terminal device 2 are supplied to monitoring terminal device 2 so that a monitoring person can monitor and control the process. For this reason, when information is provided from the central monitoring and control device 7 using the monitoring terminal device 2, only the necessary information is provided, thereby greatly reducing the time required for receiving the necessary information. At the same time, the time until the contents of the provided information is grasped can be drastically shortened, and the monitoring work, the repair work, and the like specified by the information can be started early (the effect of claim 1).

In this embodiment, a commercially available PHS telephone 3 and a PHS telephone provided by a telephone company are used.
Since the HS base station 4 is used as a part of the system, appropriate information can be provided to each monitoring terminal device 2 by reducing the cost for constructing the system. effect).

<Second Embodiment> FIG. 3 is a flowchart showing an operation example of another embodiment of the monitoring control system according to the present invention. Since the basic configuration is the same as that shown in FIG. 1, the description will be made using the block diagram of FIG. 1 in common.

In the supervisory control system 1 according to this embodiment, when an information request signal is supplied to the central supervisory control device 7 via the public line 5 and the modem device 6 in sequence, the central supervisory control device 7 It is checked whether or not the signal contains the reception base station information, and the contents of the access right corresponding to the reception base station information are checked. When making a request based on access rights,
The database is accessed, the requested information is selected, and the selected information is supplied to the monitoring terminal device 2 via the modem device 6, the public line 5, the PHS base station 4, the PHS telephone 3, and the monitoring terminal device 2. In this case, a monitor is made to monitor and control the process.

Next, the operation of the monitoring control system 1 will be described in detail with reference to the flowchart shown in FIG.

First, the central monitoring and control device 7 is operated,
When a supervisory control start instruction is input, the central supervisory control device 7 controls the LAN, and sequentially selects each process (each process such as a plant to be monitored) connected to the LAN. The output (detection information) of each sensor constituting the process, the operation information indicating the operation state of the process, and the like are collected. Based on the detection information and the operation information, the operation state of each process,
The presence or absence of an abnormality is determined, and LA is determined based on the determination result.
Control information is output on N, and each process is controlled.

In parallel with these operations, the monitoring terminal 2 is operated by a monitoring person to monitor each process,
When an instruction requesting information required for control is input, the monitoring terminal device 2 uses the monitoring terminal device 2 to make a call signal necessary for calling the modem device 6, a telephone number assigned to the modem device 6, monitoring of each process, An information request signal for requesting information necessary for control is generated, and a radio signal including a call signal, a telephone number, and an information request signal is transmitted from the PHS telephone 3.

When a radio signal is received by the PHS base station 4 whose transmission / reception area is the location where the PHS telephone 3 is located, the PHS base station 4 transmits
A wireless communication line with the HS telephone 3 as a communication partner is established, and a modem device 6 is called via the public line 5, and when the modem device 6 responds, communication with the modem device 6 as a communication partner is performed. Line is established and own PH
The information including the number of the S base station 4 (base station number) and the information request signal is transmitted from the PHS base station 4 to the public line 5 to the modem device 6.
→ Central monitoring and control device 7
(Step ST21).

Next, the central supervisory control unit 7 checks whether or not the base station number is included in the information. When the base station number is included in the information (step ST22), the modem unit 6 After it is determined that the received information request signal is the information request signal received by the PHS base station 4, there are areas where base station numbers are set in advance, that is, processes to be monitored. P for any of the areas as the transmission / reception area
It is checked whether it is the base station number of the HS base station 4 (step ST23).

When the base station number is not included in the information (step ST22), or even when the base station number is included, the area where the base station number is set in advance, that is, the monitoring target PH which sets any of the areas where each process exists as a transmission / reception area
If it is not the base station number of S base station 4 (step ST2
3) The central monitoring and control device 7 determines that the call is from a location other than the preset area, performs an on-hook process, and disconnects the communication line to the monitoring terminal device 2 (step ST24). ).

When the base station number received by the modem device 6 is the base station number of the PHS base station 4 having any one of the areas where each process exists as a transmission / reception area (step ST23), the central monitoring control is performed. By device 7
Determines whether the information specified by the information request signal included in the information can be read with each access right assigned to the base station number, and specifies by the information request signal included in the information When the obtained information can be read with each access right assigned to the base station number, the database is accessed, and the detection information, operation information, abnormality presence / absence information, etc. specified by the information request signal are selected, and this is selected. Central monitoring and control unit 7 → Modem device 6 → Public line 5 → PHS base station 4 → PHS telephone 3 → Monitoring terminal device 2
And is presented in a format such as a screen display format or a voice output format to a supervisor who carries the monitoring terminal device 2 (step ST25).

As a result, detection information, operation information, abnormality presence / absence information, and the like of the nearest process are grasped by the observer, and the process is monitored and controlled based on the grasped contents.

At this time, the monitoring terminal device 2 is placed at the home of the observer, and the access right to the base number of the PHS base station 4 whose transmission / reception area is the area where the home exists is set as “view all screens”. If "right" and "right to prohibit all setting / operation" are set, detection information, operation information, abnormality presence / absence information, etc. of each process collected by the central monitoring and control device 7 from the home of the observer Look at the,
Although the contents of each process can be grasped, the setting operation for each process is prohibited, thereby ensuring the stability of each process.

The monitoring control terminal device 2 is placed in front of a device to be monitored and controlled, for example, a pump, and the access right to the base number of the PHS base station 4 whose transmission / reception area is the area where the pump is located. If the “right to see all screens” and the “right only to perform setting operations on the pump” are set, the monitoring terminal device 2 is used as a local control panel and the central monitoring control device 7 In addition to displaying the detection information, operation information, abnormality presence information, etc. of each process collected by the
Only the setting operation for the pump is performed.

Thereafter, before the predetermined time set in advance, the monitoring terminal device 2 is operated by the monitoring person, and an information request signal for requesting new information from the monitoring terminal device 2 is output. Output and this is the monitoring terminal device 2 → P
The HS telephone 3 → PHS base station 4 → public line 5 → modem device 6 → central supervisory control device 7 Each time the central supervisory control device 7 is supplied (step ST26), the central supervisory control device 7 It is checked whether the content requested by the information request signal is based on a legitimate access right, and if the request is based on a legitimate access right,
Based on this request, the database is accessed and information is selected. This information is transmitted via the central monitoring and control device 7 → the modem device 6 → the public line 5 → the PHS base station 4 → the PHS telephone 3 → the monitoring terminal 2. It is supplied to the monitoring terminal device 2 that has issued the request, and the details of the process are presented in a format such as a screen display format or an audio output format to a monitoring person carrying the monitoring terminal device 2 ( Step ST
27).

If the content requested by the information request signal is not a request based on a valid access right (step ST
26), a signal indicating that access is not possible is generated, and this signal is sent to the central monitoring and control device 7 → modem device 6 → public line 5 → PHS
The information is supplied to the monitoring terminal device 2 which has issued the information request via the base station 4 → PHS telephone 3 → monitoring terminal device 2,
It is presented in a form such as a screen display form or a sound output form to a supervisor who carries this monitoring terminal device 2 (step ST28).

When a predetermined period of time has elapsed since the information was provided to the monitoring terminal device 2 (step ST29), the central monitoring control device 7
As a result, it is determined that the information request of the monitoring terminal device 2 has been completed, on-hook processing is performed, and the communication line to the monitoring terminal device 2 is disconnected (step ST3).
0).

As described above, in the second embodiment, the monitoring terminal device 2 is operated to input an instruction requesting information necessary for monitoring and controlling each process, and the PHS telephone 3 transmits an information request signal from the PHS telephone 3. Is transmitted, and P
This is received by the HS base station 4 and the public line 5,
When an information request signal is supplied to the central supervisory control device 7 via the modem device 6 sequentially, the central supervisory control device 7 checks whether the information request signal includes the reception base station information, The contents of the access right corresponding to the reception base station information are checked, and based on the results of these checks, when the monitoring terminal device 2 issues a request based on the legitimate access right, the database is accessed and the request is made. The selected information is selected and transmitted to the modem device 6, the public line 5, the PHS base station 4, the PHS telephone 3,
The monitoring terminal device 2 is supplied to the monitoring terminal device 2 through a path, and the monitoring personnel monitors and controls the process. For this reason, when the central monitoring and control device 7 is called from the monitoring terminal device 2, it is determined whether or not the monitoring terminal device 2 satisfies a preset condition, and the monitoring terminal device 2 satisfies the preset condition. Only in such a case, the information can be provided, thereby dramatically improving the security of the system (the effect of claim 2).

In this embodiment, a commercially available PHS telephone 3 and a PHS telephone provided by a telephone company are used.
Since the HS base station 4 is used as a part of the system, appropriate information can be provided to each monitoring terminal device 2 by reducing the cost for constructing the system. effect).

[0056]

As described above, according to the present invention, in the monitoring control system according to the first aspect, when information is provided from a host computer or the like using a portable telephone, only necessary information is provided. To shorten the time required to receive the required information, and the time required to grasp the content of the provided information. Start work early.

In the monitoring control system according to the second aspect, when the host computer is called from the portable telephone,
By judging whether or not the mobile phone satisfies a preset condition and providing information only when the preset condition is satisfied, it is possible to dramatically improve the security of the system. it can.

In the monitoring control system according to the third aspect, it is possible to provide appropriate information to each portable telephone while reducing the system construction cost by using the radio base station provided by the telephone company. it can.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a monitoring control system according to the present invention.

FIG. 2 is a flowchart showing an operation example of the embodiment of the monitoring control system shown in FIG. 1;

FIG. 3 is a flowchart showing an operation example of another embodiment of the monitoring control system shown in FIG. 1;

[Explanation of symbols]

 1: supervisory control system 2: portable terminal device for monitoring (portable terminal device) 3: PHS telephone 4: PHS base station 5: public line 6: modem device 7: central supervisory control device

Claims (3)

[Claims] 1. A monitoring control system for monitoring and controlling a process to be monitored using a portable terminal device carried by a supervisor as a part of a system, wherein when a request for information is made from the portable terminal device, Based on the base station number of the wireless base station that has relayed this request, the mobile terminal device selects optimal information for the place where the mobile terminal device is located, and supplies it to the mobile terminal device via the wireless base station. A supervisory control system, comprising: a central supervisory control device. 2. A monitoring control system for monitoring and controlling a process to be monitored by using a mobile terminal device carried by an observer as a part of the system, wherein when the mobile terminal device requests information, Based on the base station number of the wireless base station that relayed this request, grasp the access right assigned to the place where the portable terminal device is located, select the requested information within the range of this access right, A central monitoring and control device for supplying the mobile terminal device via the wireless base station to the mobile terminal device. 3. The monitoring control system according to claim 1, wherein the wireless base station is a PHS base station that receives a request for information in a wireless signal format, and the mobile terminal device is a PHS base station. A supervisory control system for outputting a request for information in the form of a wireless signal using a telephone.