JP4745873B2 - Remote monitoring system, monitoring device, and terminal device - Google Patents

Description

  The present invention relates to a remote monitoring system that remotely monitors the status of a plurality of monitoring target locations using a wireless LAN, and a monitoring device and a terminal device suitable for configuring this system.

  Conventionally, a wireless LAN access point is installed in a monitoring target area, and terminal devices connected to cameras and flame sensors are installed in a plurality of locations in the area. There is known a remote monitoring system capable of remotely monitoring a fire state at each location in a monitoring target area by communicating with a terminal device (for example, see Patent Document 1).

In this type of remote monitoring system, a plurality of terminal devices and monitoring devices installed in a monitoring target location transmit and receive monitoring information such as images using a wireless LAN, so there is no need to wire a dedicated communication line. Easy to build.
JP 2001-126171 A

  By the way, in the remote monitoring system using a wireless LAN as described above, each terminal device is connected to an access point (in other words, a wireless LAN) so that information can be transmitted to and received from the monitoring device. There is a problem that it is necessary to manually assign an IP address for wireless LAN connection (specifically, a private IP address) to each terminal device, and the setting work is troublesome.

  In addition to wireless LANs, in networks using IP addresses, it is known to construct a DHCP (Dynamic Host Configuration Protocol) server for automatic assignment of IP addresses. In such a remote monitoring system, it is too expensive to construct such a DHCP (Dynamic Host Configuration Protocol) server separately, and management is troublesome. Therefore, it is a reality to construct a DHCP server in a remote monitoring system. Not right.

  The present invention has been made in view of these problems. In a remote monitoring system that performs remote monitoring using a wireless LAN, the IP address of each terminal device can be easily set from the monitoring device side without constructing a DHCP server. The purpose is to be able to.

The invention according to claim 1, which has been made to achieve such an object, detects a state of a monitoring target location, and transmits the detection result via a communication means for wireless LAN connection, and By communicating between the wireless LAN access point capable of wireless communication with the communication means of each terminal device and each of the terminal devices via the access point, the detection result is obtained from each terminal device. A remote monitoring system comprising: a monitoring device that acquires and notifies the state of each monitoring target location based on the acquired detection result;
When the monitoring device receives a new registration instruction for the terminal device, the monitoring device calls the terminal device to which the initial fixed IP address is assigned via the access point, and then receives a response signal for the call via the access point. Then, a terminal calling unit for determining whether or not the response signal includes preset regular identification information, and the terminal calling unit calls the terminal device having the initial fixed IP address, and responds to the call. If it is determined that the legitimate identification information is included in the response signal, the terminal device having the initial fixed IP address is different from the initial fixed IP address through the access point and is currently registered. A new IP address different from the IP address of the terminal device is transmitted, and the new IP address is transmitted to the access point. Through and a IP address transmitting means for storing the IP address of the terminal device necessary to obtain the detection result,
Each terminal device stores an initial fixed IP address common to each terminal device as an initial value of an IP address for connecting to the wireless LAN via the communication means, and as identification information of the terminal device, With the storage means storing identification information common to each terminal device and the communication means connected to the wireless LAN at the initial fixed IP address, the monitoring device sends the IP address of the terminal device. In response to a call to an initial fixed IP address, in response to the call, response means for transmitting a response signal including identification information common to each terminal device stored in the storage means from the communication means to the monitoring device And when the communication means receives a new IP address transmitted from the monitoring device toward the IP address of the terminal device, the communication means , Characterized in that a reconnection means for reconnecting to the wireless LAN in the novel IP address.

  Next, according to a second aspect of the present invention, in the remote monitoring system according to the first aspect, the monitoring device automatically sets or manually sets a new IP address transmitted by the IP address transmitting means. This can be selected by an external operation.

  On the other hand, the invention according to claim 3 is a remote monitoring system including a plurality of terminal devices that detect a state of a monitoring target location and transmit the detection result via communication means for wireless LAN connection. A monitoring device that obtains the detection result from each terminal device by communicating with each terminal device via the access point and notifies the state of each monitoring target location based on the obtained detection result. When receiving a new registration instruction of the terminal device, the terminal device to which an initial fixed IP address is given via the access point is called, and then a response signal for the call is received via the access point. A terminal calling means for determining whether or not the response signal includes preset regular identification information; and the terminal calling means includes the initial fixed I When the terminal device with the address is called and it is determined that the legitimate identification information is included in the response signal for the call, the terminal device with the initial fixed IP address is connected to the initial fixed IP address via the access point. And a new IP address different from the IP addresses of other currently registered terminal devices, and the new IP address of the terminal device necessary for acquiring the detection result via the access point. An IP address transmitting means for storing as an IP address is provided.

  The invention according to claim 4 includes a communication means for performing communication with the monitoring apparatus via the wireless LAN access point, detects the state of the monitoring target portion, and outputs the detection result to the detection result. A terminal device that transmits to a monitoring device via a communication means, and an initial fixed IP address common to each terminal device is stored as an initial value of an IP address for connecting to the wireless LAN via the communication means In addition, as the identification information of the terminal device, the monitoring means in which the identification information common to the terminal devices is stored, and the communication means is connected to the wireless LAN at the initial fixed IP address. When there is a call from the device to the initial fixed IP address that is the IP address of the terminal device, in response to the call, the communication means stores the storage in the monitoring device. Response means for transmitting a response signal including identification information common to each terminal device stored in the stage, and when the communication means receives a new IP address transmitted from the monitoring device toward the IP address of the terminal device The communication means includes reconnection means for reconnecting to the wireless LAN with the new IP address.

  In the remote monitoring system according to claim 1, when a new registration command is input from the outside to the monitoring device, the terminal calling means of the monitoring device gives an initial fixed IP address via the wireless LAN access point. Then, when a response signal for the call is received via the access point, it is determined whether or not the regular identification information set in advance is included in the response signal.

  Thus, when the terminal calling means of the monitoring device calls the terminal device to which the initial fixed IP address is assigned, the regular terminal device to which the initial fixed IP address is assigned is connected to the wireless LAN access point. If so, the response means of the terminal device reads the regular identification information common to each terminal device from the storage means, and transmits a response signal including this identification information. Thus, it is determined that the legitimate identification information is included in the response signal.

  Further, in this way, when the terminal calling means of the monitoring apparatus determines that the legitimate identification information is included in the response signal, the IP address transmission means of the monitoring apparatus transmits the initial fixed signal from which the response signal has been transmitted. A new IP address that is different from the initial fixed IP address and different from the IP addresses of other currently registered terminal devices is transmitted to the terminal device having the IP address via the access point. , And stored as the IP address of the terminal device necessary for obtaining the detection result via the access point.

  Also, as described above, when the IP address transmitting unit of the monitoring device transmits a new IP address, the communication unit transmits the IP address transmitting unit of the monitoring device on the terminal device side of the initial fixed IP address that transmitted the response signal. Receive a new IP address. Then, the reconnection unit reconnects the communication unit to the wireless LAN with the new IP address.

  Therefore, according to the remote monitoring system of the present invention, the initial fixed IP address for connection to the wireless LAN and identification information common to each terminal device are registered in the storage means of the terminal device at the time of factory shipment or the like. When using the device, the registered initial fixed IP address is used to connect to the wireless LAN, and then a new registration command is input to the monitoring device. Will be automatically assigned.

Therefore, according to the remote monitoring system of the present invention, a unique IP address can be assigned to each terminal device from the monitoring device side without constructing a DHCP server.
When a unique IP address (new IP address) is assigned in this way, the terminal device is reconnected to the wireless LAN using the assigned IP address, and the monitoring device uses this IP address. It becomes possible to communicate with the terminal device and acquire the detection result.

  Next, in the remote monitoring system according to claim 2, the monitoring device can select whether to automatically set or manually set an IP address (new IP address) to be assigned to the terminal device by an external operation. Since it is configured, the user can manually set the IP address to be assigned to each terminal device to a desired address, thereby improving usability.

  On the other hand, the monitoring device according to claim 3 is provided with terminal calling means and IP address transmission means, similarly to the monitoring device according to claim 1. For this reason, if the monitoring device according to claim 3 is used, the monitoring system according to claim 1 is constructed, and the same effect as in claim 1 can be obtained. In addition, what is necessary is just to utilize the following terminal device for construction of this monitoring system.

  Next, the terminal device according to claim 4 includes storage means, response means, and reconnection means, similarly to the terminal device according to claim 1. Therefore, if the terminal device according to claim 4 is used, the monitoring system according to claim 1 is constructed by combining with the monitoring device according to claim 3, and the same effect as in claim 1 is obtained. Be able to get.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing the overall configuration of the remote monitoring system of this embodiment.
As shown in FIG. 1, the remote monitoring system of this embodiment constructs a wireless LAN by performing wireless communication with a plurality of terminal devices 10a, 10b,... And a plurality of monitoring devices 20a, 20b,. And the access point 2 to be used.

  Here, the access point 2 relays data communication performed between each of the above units by performing wireless communication with the above units using a protocol compliant with “IEEE802.11b”, which is a general specification of a wireless LAN. It is a well-known one, and a preset IP address is registered.

  Next, each of the terminal devices 10a, 10b,... Is configured by a microcomputer, and is installed at an arbitrary monitoring target location. .. Are connected to the terminal devices 10a, 10b,... As wireless communication devices 19a, 19b,. As detection means for detecting the state, cameras 12a, 14b,... For capturing images of the monitoring target location, microphones (mics) 14a, 14b,. Sensors 16a, 16b,... For detecting intrusion are connected.

  Also connected to each of the terminal devices 10a, 10b,... Are speakers 18a, 18b for generating sounds transmitted from the monitoring devices 20a, 20b,. In each terminal device 10a, 10b,..., Identification information (terminal ID) common to each terminal device set at the time of shipment from the production factory is registered as a storage means, and other information is also obtained via an access point. A memory M (consisting of an EEPROM, which is a non-volatile memory) in which an initial fixed IP address for data communication with the apparatus (in other words, for connection to a wireless LAN) is registered is incorporated.

  This initial fixed IP address is an address common to each terminal device, as is the identification information (terminal ID), and each terminal device 10a, 10b,... Is set with a device-specific IP address after the device is activated. Until this is done, the initial fixed IP address is used to connect to the access point (ie, wireless LAN).

  On the other hand, the monitoring devices 20a, 20b,... Are constituted by personal computers (so-called personal computers), and are installed at arbitrary monitoring locations. And each monitoring device 20a, 20b,..., As with each terminal device 10a, 10b,..., Wireless transceivers 29a, 29b,. Is connected.

  Also connected to each of the monitoring devices 20a, 20b,... Are display units 22a, 22b,... And speakers 28a, 28b for reproducing images and sounds transmitted from the terminal devices 10a, 10b,. In addition, operation units (including a keyboard, a mouse, etc.) 24a, 24b,... For inputting various commands to the monitoring devices 20a, 20b,.

In each of these monitoring devices 20a, 20b,..., IP addresses for performing data communication with other devices via the access point 2 are registered.
Note that the subscripts a, b,... Attached to the respective symbols in the above description are for distinguishing the same ones. However, in the following description, when it is not necessary to distinguish in particular, for example, a terminal device. The description of the subscripts a, b,.

  In the remote monitoring system configured as described above, each terminal device 10 is responsive to a command transmitted via the access point 2 to input signals (video signal, audio signal, Detection signal) is converted into digital data and is taken in, and this is sent as monitoring data to the request source via the wireless transceiver 19 and the access point 2.

  In addition, the monitoring device 20 acquires monitoring data transmitted from each terminal device 10 via the wireless transceiver 29, stores the monitoring data in a built-in storage medium (hard disk or the like), and is preset in received data. The selected data is selected and an image is displayed on the display unit 22 or a sound or warning sound is output from the speaker 28.

  In addition, although there are a plurality of monitoring devices 20, one of them (the monitoring device 20a in the figure) is set as a main monitoring device higher than the other monitoring devices 20, and is not specified in the other monitoring devices 20. The function of is given.

  Specifically, in the main monitoring device 20a, the operation of each terminal device 10 is set in accordance with a command input via the operation unit 24a, and the microphone 26a and the speaker 28a connected to the main monitoring device 20a are connected to the main monitoring device 20a. A function for performing a voice call with each terminal device 10 using the microphone 14 and the speaker 18 connected to the terminal device 10 is given, and the other monitoring devices 20b,. As described above, only the function of monitoring the monitoring data transmitted from each terminal device 10 is given.

In this embodiment, each monitoring device 20 can be set as a main monitoring device whenever there is one monitoring device 20 connected to the access point 2.
That is, when the personal computer constituting each monitoring device 20 is turned on and a program for realizing the function as the monitoring device 20 is started, first, the startup setting process shown in FIG. 2 is executed.

  Then, when this startup setting process is executed, the monitoring device 20 searches for another device connected to the wireless LAN via the access point 2 (S110: S represents a step), and enters the wireless LAN. Determines whether another monitoring device 20 is connected (S120). If no other monitoring device 20 is connected to the wireless LAN (S120: NO), its own function is set to become the main monitoring device (S130), and the other monitoring device 20 is connected to the wireless LAN. If so (S120: YES), it sets its own function to become a sub-monitoring device (S140).

  In addition, the monitoring device 20 to which the function as the main monitoring device is provided in this way is a unique IP address for the terminal device 10 connected to the access point 2 by the user operating the operation unit 24a. Or terminal operation authority to set an encryption code such as Extended Service Set Identifier (ESSID) is assigned to each terminal device 10 so that transmission data from the terminal device 10 is not leaked.

  This terminal operation authority is obtained when a user of each monitoring device 20 inputs a terminal setting command via the operation unit 24 in order to register the terminal device 10 in the remote monitoring system or change the registration content. This is used to determine whether or not the series of terminal setting processes shown in FIG. 3 can be executed.

That is, each monitoring device 20 executes a terminal setting process shown in FIG. 3 when a terminal setting command is input via the operation unit 24.
In this terminal setting process, first, in S210, it is determined whether or not the terminal device 10 is authorized to operate the terminal device 10, and if the terminal operation authority is not granted, the terminal setting process is performed as it is. Exit.

  On the other hand, if it is determined in S210 that the terminal operation authority is granted, the process proceeds to S220, where the registration setting screen of the terminal device 10 is displayed on the display unit 22, and in S230, the user By looking at the registration setting screen and operating the operation unit 24, it is determined whether or not new registration of the terminal device 10 has been instructed.

When new registration is instructed, the process proceeds to S240, and the terminal device 10 having the initial fixed IP address is called through the access point 2.
That is, in the remote monitoring system of this embodiment, the terminal device 10 in which the initial fixed IP address is registered together with the above-described terminal ID at the time of factory shipment is used. Here, the terminal device 10 having this initial fixed IP address is used. Is called as the terminal device 10 to be newly registered.

  The initial fixed IP address belongs to the same group as the IP addresses of the access point 2 and the monitoring device 20, and the terminal device 10 to which the initial fixed IP address is assigned is connected to the wireless LAN after power-on, and the access point Needless to say, wireless communication with 2 is possible.

  Moreover, in this embodiment, when calling the terminal device 10 in S240, the terminal device 10 is prevented from being called illegally by a device other than the monitoring device by giving a terminal ID to the call command. Yes.

  Next, when the terminal device 10 having the initial fixed IP address is called as described above, it is determined in S250 whether there is a terminal device 10 that has responded to the call. If there is no terminal device 10 that has responded, it is determined that the terminal device 10 to be newly registered is not connected to the access point 2, and the terminal setting process is terminated as it is.

  On the other hand, when it is determined in S250 that there is a terminal device 10 that has responded to the call, in S260, the terminal ID included in the transmission data from the terminal device 10 is acquired, and in S270 that follows, this terminal It is determined whether the ID is a regular one registered in advance.

  If it is determined in S270 that the acquired terminal ID is not legitimate, the terminal setting process is terminated as it is. Conversely, if it is determined that the terminal ID is legitimate, the process proceeds to S280. It is determined whether the IP address is automatically registered or manually registered with respect to the terminal apparatus 10 that has responded. Whether or not to manually register the IP address can be specified by the user on the setting screen displayed on the display unit 22 in S220.

  In S280, if manual registration of the IP address is not designated on the setting screen, it is determined that the IP address is automatically registered, and the process proceeds to S290. In S290, terminal registration data that is a list of IP addresses of the terminal devices 10 already registered in the system is read.

  In the subsequent S300, a new IP address to be registered in the terminal device 10 is selected from the free IP addresses not registered in the terminal registration data, and the new IP address is returned to the terminal device 10 ( That is, it is transmitted to the terminal device 10) to which the initial fixed IP address is currently set.

  As a result, the IP address of the terminal device 10 that has responded to the call from the monitoring device 20 is changed from the initial fixed IP address to the new IP address by a response process (see FIG. 4) described later executed on the terminal device 10 side. Will be.

  In this embodiment, when a new IP address is transmitted to the terminal device 10 in S300, the terminal ID is assigned to the transmission signal so that the IP address of the terminal device 10 is illegally received from a device other than the monitoring device 20. This prevents rewriting to the transmitted IP address.

  Then, when a new IP address is transmitted to the terminal device 10 in S300, the process proceeds to S310, where the transmitted new IP address is written in the terminal registration data, thereby updating the terminal registration data, and the terminal setting process. Is temporarily terminated.

  On the other hand, if it is determined in S280 that the manual registration of the IP address is designated on the setting screen, the process proceeds to S320 to read the terminal registration data, and in S330, the terminal registration data is changed to the terminal registration data. A list of registered IP addresses and free IP addresses that can be newly registered in the terminal device 10 are displayed on the display screen of the display unit 22. This display screen allows the user to select one of the free IP addresses displayed as a list as a new IP address by operating the operation unit 24.

  In S340, it is determined whether one of the free IP addresses has been selected as a new IP address on the display screen. If no free IP address has been selected, the process proceeds to S330 again to display the display screen. Wait for a free IP address to be selected above.

  Next, when it is determined in S340 that one of the free IP addresses has been selected as a new IP address, the process proceeds to S350, and the selected free IP address is transmitted to the terminal device as a new IP address. Then, the IP address of the terminal device 10 that has responded to the call is changed from the initial fixed IP address to the new IP address.

Note that when a new IP address is transmitted to the terminal device 10 in S350, a terminal ID is assigned to the transmission signal as in the process of S300.
Then, the process proceeds to S310, where the transmitted new IP address is written in the terminal registration data to update the terminal registration data, and the terminal setting process is temporarily terminated.

  Next, in S230, when it is determined that the new registration of the terminal device 10 is not instructed, the process proceeds to S360, and whether the user has instructed the registration change of the IP address of the terminal device 10 or not. Determine whether.

  If the IP address registration change is instructed, the process proceeds to S370, and the IP address of the terminal device 10 that is the object of the registration change input by the user together with the IP address registration change command is acquired.

  After that, by executing the above-described processing of S320 to S340, the user is made to select a new IP address from among the free IP addresses, and in S350, the new IP address is set as a registration change target. The terminal device 10 (here, the terminal device 10 having the IP address acquired in S370) is transmitted to the terminal device 10 to change the IP address of the terminal device 10 from the already registered IP address to the new IP address. Let

  After transmitting the new IP address to the terminal device 10 in this way, in S310, the transmitted new IP address is written in the terminal registration data, and the original IP address of the terminal device 10 is deleted from the terminal registration data. As a result, the terminal registration data is updated, and the terminal setting process is temporarily terminated.

  Next, in S360, if it is determined that an instruction to change registration of the IP address of the terminal device 10 has not been instructed, the process proceeds to S380 and whether or not the user has instructed registration of the encryption code. Judging.

  If the encryption code registration is not instructed, the terminal setting process is terminated as it is. If the encryption code registration is instructed, the process proceeds to S390 and the user registers the encryption code. Obtain the IP address of the terminal device that was entered with the command.

  In the subsequent S400, the encryption code is transmitted to the terminal device 10 having the IP address acquired in S390, thereby registering the encryption code in the terminal device 10, and the terminal setting process is temporarily ended.

  Since the terminal device 10 that has transmitted the encryption code in S400 then transmits the monitoring data after encrypting the monitoring data using the encryption code, in S400, simply transmits the encryption code to the terminal device 10. In addition to transmission, the encrypted code transmitted and the IP address of the terminal device 10 that transmitted the encryption code are stored, and thereafter, encrypted data (monitoring data) transmitted from the terminal device 10 is stored. Can be accurately decrypted using an encryption code corresponding to the encrypted data.

Further, when the encryption code is transmitted to the terminal device 10 in S400, the terminal ID is given to the transmission signal as in the processing of S300 and S350.
In the present embodiment, the monitoring data transmission operation from each terminal device 10 can be controlled from the monitoring device 20 (main monitoring device 20a) side to which the terminal operation authority is given. Even when the command signal is transmitted from the monitoring device 20 side, each terminal device 10 cannot be illegally operated from a device other than the monitoring device 20 by giving a terminal ID to the command signal. .

  Next, FIG. 4 shows the setting of the IP address, the transmission of monitoring data, etc. according to various command signals transmitted from the monitoring device 20 (specifically, the main monitoring device 20a) in the microcomputer constituting each terminal device 10. It is a flowchart showing the response process performed in order to perform.

  This response process is a process that is repeatedly executed after the terminal device 10 is activated. When the process is started, first, in S510, the wireless transceiver 19 transmits the response from the main monitoring device 20a to the terminal device 10. By determining whether or not the transmitted command signal has been received, the wireless transceiver 19 waits for the command signal to be received.

  When it is determined in S510 that the command signal from the main monitoring device 20a has been received, in S520, the received data obtained by decoding the received signal is read. It is determined whether or not the same terminal ID as that of the terminal ID is assigned.

  If the received data is not assigned with its own terminal ID, the command signal received this time is not sent from the regular main monitoring device 20a, but sent from another device to the terminal device 10 illegally. If the received data is given its own terminal ID, the command signal received this time is from the authorized main monitoring device 20a. If it is determined that there is, the process proceeds to S540.

  In S540, it is determined whether the received data is a call command for calling the terminal device 10 and returning a response signal including the terminal ID. If the received data is a call command, the process proceeds to S550. A response signal (data) including the terminal ID is generated, and this response signal is transmitted from the wireless transceiver 19 toward the access point 2 (and thus the main monitoring device 20a), and the process proceeds to S510 again.

  If it is determined in S540 that the received data is not a call command, the process proceeds to S560 to determine whether the received data is an IP address setting command including a new IP address. If the received data is an IP address setting command, the process proceeds to S570, and the received data includes the IP address currently stored in the memory M for connection to the wireless LAN (specifically, the access point 2). Change to a new IP address.

  Further, when the IP address for wireless LAN connection is changed to the new IP address transmitted from the main monitoring device 20a in this way, the process proceeds to S580 and the wireless transceiver 19a is restarted, so that the terminal The apparatus 10a is reconnected to the wireless LAN (specifically, the access point 2) with the new IP address, and the process proceeds to S510 again.

  Next, in S560, when it is determined that the received data is not an IP address setting command, the process proceeds to S590, where it is determined whether the received data is an encryption command including an encryption code. To do.

  If the received data is an encryption command, the process proceeds to S600, where an encrypted code is extracted from the received data, and this encrypted code is then used to encrypt the monitoring data when monitoring data is transmitted. The encryption code to be used is stored in the memory M, and the process proceeds to S510 again.

  Next, in S590, if it is determined that the received data is not an encryption command, the process proceeds to S610, where the received data is used to set the monitoring data transmission operation from the terminal device 10. It is determined whether it is a data transmission command.

  If the received data is a data transmission command, the process proceeds to S620, the monitoring data transmission process is started so as to transmit the monitoring data according to the contents of the command, and the process proceeds to S510 again.

  As described above, according to the remote monitoring system of the present embodiment, the terminal device 10 is newly provided via the operation unit 24 to the monitoring device 20 (more specifically, the main monitoring device 20a) to which the terminal operation authority is given. When the registration is instructed, the monitoring device 20 calls the terminal device 10 to which the initial fixed IP address is assigned via the access point 2, and a regular terminal ID is transmitted from the terminal device 10 in response to the call. Then, a new IP address is transmitted to the terminal device 10 and registered as an IP address unique to the terminal device.

  For this reason, according to the present embodiment, an initial fixed IP address and a terminal ID that is identification information of the terminal device are registered in the terminal device 10, and access is made using the initial fixed IP address at the time of use. By connecting to the point 2 and then inputting a new registration command for the terminal device 10 to the monitoring device 20, a unique IP address is assigned to the terminal device 10 on the wireless LAN, and the IP address is assigned to the IP address. Can be connected to a wireless LAN.

Therefore, according to the present embodiment, a unique IP address can be assigned to each terminal device 10 from the monitoring device 20 side without constructing a DHCP server.
In the present embodiment, when the terminal device 10 is newly registered on the monitoring device 20 (specifically, the main monitoring device 20a) side, a new IP address assigned to the terminal device 10 is automatically set or manually set. The user can select whether to do this. Therefore, the administrator can manually specify a new IP address, for example, to set a new IP address for each terminal apparatus 10 so that the installation location can be identified from the IP address.

  Furthermore, in the present embodiment, since the IP address unique to the terminal device assigned when newly registering the terminal device 10 can be changed via the monitoring device 20 (specifically, the main monitoring device 20a), the user can Usability when monitoring the IP address of the terminal device 10 can be improved.

  In the present embodiment, when each terminal device 10 transmits monitoring data, whether or not to encrypt the data can be set from the monitoring device 20 (specifically, the main monitoring device 20a) side. Therefore, the user can select whether or not to encrypt the monitoring data in consideration of security and ease of monitoring of the monitoring data by a device other than the monitoring device. Usability can be improved.

  Furthermore, each terminal device 10 performs IP address setting / change, encryption code setting, monitoring data transmission operation setting, and the like in accordance with commands from the monitoring device 20 (specifically, the main monitoring device 20a). These setting operations are performed only when their own terminal ID is given to the command signal. If their own terminal ID is not given to the command signal, these setting operations are prohibited. Have been to.

  Therefore, for example, if the IP address of the terminal device 10 leaks to the outside and a third party tries to obtain image data from the terminal device 10 illegally using the IP address, the terminal ID is not known. Cheating cannot be performed. Therefore, according to the monitoring system of this embodiment, security can also be improved.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various aspect can be taken in the range which does not deviate from the summary of this invention.
For example, in the above-described embodiment, a plurality of monitoring devices 20 can be connected to the access point 2, and one of them is described as being given terminal operation authority to remotely control the terminal device 10. You may make it give a terminal operation authority to each of the some monitoring apparatus 20 connected to the access point 2. FIG.

It is a schematic block diagram showing the structure of the whole remote monitoring system of embodiment. It is a flowchart showing the starting time setting process performed with a monitoring apparatus. It is a flowchart showing the terminal setting process performed with a monitoring apparatus. It is a flowchart showing the response process performed with a terminal device.

Explanation of symbols

  2. Access point, 10 (10a, 10b) ... Terminal device, 12 (12a, 12b) ... Camera, 14 (14a, 14b) ... Microphone, 16 (16a, 16b) ... Sensor, 18 (18a, 18b) ... Speaker , 19 (19a, 19b) ... wireless transceiver, M ... memory, 20 (20a, 20b) ... monitoring device, 22 (22a, 22b) ... display unit, 24 (24a, 24b) ... operation unit, 26 (26a, 26b) ... microphone, 28 (28a, 28b) ... speaker, 29 (29a, 29b) ... wireless transceiver.

Claims (4)

A plurality of terminal devices that detect a state of a monitoring target portion and transmit the detection result via communication means for wireless LAN connection;
A wireless LAN access point capable of wireless communication with the communication means of each terminal device;
Monitoring that obtains the detection result from each terminal device by communicating with each terminal device via the access point, and notifies the state of each monitoring target location based on the obtained detection result Equipment,
A remote monitoring system comprising:
The monitoring device
When receiving a new registration command for the terminal device, the terminal device to which an initial fixed IP address is assigned is called through the access point, and then a response signal for the call is received through the access point. A terminal calling means for determining whether or not regular identification information set in advance is included,
When the terminal calling unit calls the terminal device having the initial fixed IP address and determines that the legitimate identification information is included in the response signal to the call, the terminal calling unit sends the access point to the terminal device having the initial fixed IP address. Via the access point, a new IP address that is different from the initial fixed IP address and different from the IP addresses of other currently registered terminal devices is transmitted, and the detection result is transmitted to the new IP address via the access point. IP address transmission means for storing the IP address of the terminal device necessary for acquisition;
With
Each terminal device is
An initial fixed IP address common to each terminal device is stored as an initial value of an IP address for connecting to the wireless LAN via the communication means, and common to each terminal device as identification information of the terminal device Storage means for storing identification information;
In a state where the communication means is connected to the wireless LAN with the initial fixed IP address, if there is a call from the monitoring device to the initial fixed IP address that is the IP address of the terminal device, the call is answered. Response means for transmitting a response signal including identification information common to each terminal device stored in the storage means from the communication means to the monitoring device;
When the communication means receives a new IP address transmitted from the monitoring device toward the IP address of the terminal device, reconnection means for reconnecting the communication means to the wireless LAN at the new IP address; ,
A remote monitoring system characterized by comprising:   2. The remote monitoring according to claim 1, wherein the monitoring device can select whether to automatically set or manually set a new IP address transmitted by the IP address transmitting unit by an external operation. system. In a remote monitoring system comprising a plurality of terminal devices that detect the state of a monitoring target location and transmit the detection result via a communication means for wireless LAN connection, the remote monitoring system is connected to each terminal device via a wireless LAN access point. A monitoring device that obtains the detection result from each terminal device by communicating between them, and informs the state of each monitoring target location based on the obtained detection result,
When receiving a new registration command for the terminal device, the terminal device to which an initial fixed IP address is assigned is called through the access point, and then a response signal for the call is received through the access point. A terminal calling means for determining whether or not regular identification information set in advance is included,
When the terminal calling unit calls the terminal device having the initial fixed IP address and determines that the legitimate identification information is included in the response signal to the call, the terminal calling unit sends the access point to the terminal device having the initial fixed IP address. Via the access point, a new IP address that is different from the initial fixed IP address and different from the IP addresses of other currently registered terminal devices is transmitted, and the detection result is transmitted to the new IP address via the access point. IP address transmission means for storing the IP address of the terminal device necessary for acquisition;
A monitoring device comprising: A terminal that includes a communication unit for communicating with a monitoring device via an access point of a wireless LAN, detects a state of a monitoring target location, and transmits the detection result to the monitoring device via the communication unit A device,
An initial fixed IP address common to each terminal device is stored as an initial value of an IP address for connecting to the wireless LAN via the communication means, and common to each terminal device as identification information of the terminal device Storage means for storing identification information;
In a state where the communication means is connected to the wireless LAN with the initial fixed IP address, if there is a call from the monitoring device to the initial fixed IP address that is the IP address of the terminal device, the call is answered. Response means for transmitting a response signal including identification information common to each terminal device stored in the storage means from the communication means to the monitoring device;
When the communication means receives a new IP address transmitted from the monitoring device toward the IP address of the terminal device, reconnection means for reconnecting the communication means to the wireless LAN at the new IP address; ,
A terminal device comprising:

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