JP2000242881A - Guard communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the adverse effect of an external noise with respect to the storage contents of RAM in a communication controller and also to prolong the life of a non-volatile memory. SOLUTION: Set data for deciding the operation state of the communication controller 3 is stored in RAM 5 of the controller 3. A controller 2 manages a set data file 20 where whole set data stored in RAM of the controller 3 is written. When a prescribed event occurs, the controller 2 reads whole set data written in the file 20 and instructs the controller 4 to store the setting data in RAM 5. In this case, the controller 2 fetches the storage contents of the non-volatile memory 6 and instructs the controller 4 in the controller 3 to execute a processing to store prescribed set data in the memory 6, which are among the ones stored in RAM 5 when the contents are different from those written in the file 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security system for notifying a center device installed in a security company or the like via a telephone line that an abnormality has occurred at least when an abnormality has occurred. The present invention relates to a communication system.

[0002]

2. Description of the Related Art Conventionally, as a security communication system, FIG.
As shown in FIG. 1, a system including an image transmission device 1 and a communication control device 3 is known. Such a system is widely known, but is briefly described as follows. 2, reference numeral 1 denotes an image transmission device, 2 denotes a control device, 3 denotes a communication control device, and L denotes a telephone line.

[0003] The security communication system is installed at a location to be guarded. The image transmission device 1
The control device 2 includes a processing unit and its peripheral circuits.

The communication control device 3 performs bidirectional communication with a center device (not shown) via the telephone line L to exchange data. When the telephone line L is an analog line, Is composed of a modem and the telephone line L is ISD
If it is an N line, use a terminal adapter (hereinafter referred to as T
A), and a digital line terminal (hereinafter referred to as DSU).
).

[0005] The image transmission apparatus 1 is connected to a security sensor and a monitoring camera for detecting an abnormality such as a heat ray sensor. The surveillance camera and the security sensor are associated with each other. When a certain security sensor issues an alarm, an image from the surveillance camera associated with the security sensor is transmitted to the telephone line L by the communication control device 3. The data is transmitted to the center device via the control unit. In general, a plurality of security sensors and surveillance cameras are provided. However, in order to avoid complication, the figure simply shows that the security sensors and surveillance cameras are connected to the image transmission device 1. ing.

[0006] A setting device is also connected to the image transmission device 1. This setting device sets the alert status /
This is for setting the release state. Although a plurality of setting devices are generally provided, the drawing simply shows that the setting device is connected to the image transmission device 1 in order to avoid complicating the drawing.

When the alerting of an area is released by the setting device, the control device 2 of the image transmission device 1 generates information indicating that the release state has been set for the area, and generates the telephone number of the center device. At the same time, the data is passed to the communication control device 3 to instruct transmission to the center device. Thereby, the communication control device 3 dials the telephone number of the center device and transmits the information when the line is closed.

Similarly, when an area is set to the alert state by the setting device, the control device 2 generates information indicating that the alert state has been set for the area, and communicates the information with the telephone number of the center device. It is passed to the control device 3 and instructs transmission to the center device. Thereby, the communication control device 3 dials the telephone number of the center device and transmits the information when the line is closed.

Further, when the security sensor in the area set in the alert state alerts, the control device 2 informs the center device of the image data from the surveillance camera corresponding to the alert security sensor and the abnormality. The information indicating the occurrence and the telephone number of the center device are passed to the communication control device 3 to instruct transmission to the center device. Thus, the communication control device 3 dials the telephone number of the center device, and when the line is closed, transmits image data and information indicating that an abnormality has occurred to the center device.

[0010] Further, the control device 2 sends a periodic notification to the center device at regular intervals. In the case of the regular notification, the control device 2 passes the information indicating the regular report and the telephone number of the center device to the communication control device 3 and instructs transmission to the center device. Thereby, the communication control device 3
Dials the telephone number of the center device and transmits the information when the line is closed. This periodic notification is information indicating that the image transmission device 1 is operating normally. That is, when the center device receives the information indicating the scheduled notification, it can be determined that the image transmission device 1 is operating normally.

As described above, when the telephone line L is an analog line, the communication control device 3 is constituted by a modem. FIG. 3 shows an example of such a structure. In FIG. 3, a communication control device 3 including a modem includes a control device 4 that performs data transmission processing, data reception processing, memory control of the RAM 5 and the nonvolatile memory 6, and the like.
5, a nonvolatile memory (hereinafter, simply referred to as a nonvolatile memory) 6 whose storage contents can be electrically rewritten.
Normally, an EEPROM is used as the nonvolatile memory 6.

Various setting data for determining the operating conditions of the communication control device 3 are written in the RAM 5. Therefore, the control device 4 operates based on the setting data written in the RAM 5.

The control device 4 writes predetermined setting data in the setting data written in the RAM 5 to the nonvolatile memory 6. The setting data to be written to the non-volatile memory 6 is not generally defined, but is currently determined uniquely by the modem maker. In many cases, setting data that does not need to be written is written to the nonvolatile memory 6.

For example, the setting data written in the RAM 5 includes data for setting whether or not to make an automatic call, and data for setting how many times a call is made to make an automatic call when making an automatic call. However, these setting data are often written in the nonvolatile memory 6.

In any case, when any setting data is written into the RAM 5 such as when new setting data is set in the RAM 5 or when the setting data is changed, the control device 4 sets a predetermined predetermined value. With respect to the setting data, a process of automatically writing the data to the nonvolatile memory 6 is performed.

When the telephone line L is an ISDN line, the communication control device 3 sets TA7 and D as shown in FIG.
The SU 7 includes a data transmission process, a data reception process, a RAM 10 and a non-volatile memory 11.
A control device 9 for performing memory control and the like, a RAM 10, and a nonvolatile memory (hereinafter, simply referred to as a nonvolatile memory) 11 whose storage contents can be electrically rewritten are provided.

The RAM 10 and the non-volatile memory 11 are equivalent to the RAM 5 and the non-volatile memory 6 shown in FIG. 3, respectively. As the non-volatile memory 11, an EEPROM which is an electrically rewritable ROM is used. . Various setting data for setting the operation conditions of the communication control device 3 are written in the RAM 10,
Predetermined setting data among the setting data written in the RAM 10 is automatically written into the nonvolatile memory 11 by the control device 9. What setting data is to be written to the nonvolatile memory 11 is not generally defined, but is uniquely determined by the TA maker.

It should be noted that although a plurality of TAs, telephones, facsimile machines and the like can be normally connected to the DSU, FIG. 4 shows a case where only one TA 7 is connected.

[0019]

Now, in the configuration of FIG. 2, it is assumed that the telephone line L is an analog line, the communication control device 3 is a modem, and has the configuration shown in FIG. Since the security communication system is for security, the image transmission device 1 and the communication control device 3
Is always powered on. That is, the security communication system is always operating, and the power is not turned off. This is because security needs to be in place at all times.

However, for that purpose, R
The AM5 is always exposed to external noise, and there is a problem that the storage content of the RAM 5 is changed by the external noise and the communication control device may not operate normally.

As described above, the telephone line L is an analog line,
Although the case where the communication control device 3 is a modem has been described, the above-described problem similarly occurs when the telephone line L is an ISDN line and the communication control device 3 is configured with a TA and a DSU.

Further, the above-mentioned problem occurs not only in a security communication system using an image transmission device but also in a security communication system using a security device only having a security sensor and a setting device. is there.

Therefore, the present invention provides a RAM for a communication control device.
It is an object of the present invention to provide a security communication system capable of avoiding adverse effects due to external noise by initializing the storage contents of the RAM even when the stored content of the RAM is changed by external noise. It is.

[0024]

To achieve the above object, a security communication system according to the first aspect of the present invention has at least a two-way communication with a security device having a security sensor, a security device having a setting device, and a center device. A communication system for security, comprising: a communication control device that performs data transmission and reception, the communication control device comprising: a RAM that stores setting data that defines operating conditions of the communication control device; and a setting stored in the RAM. A nonvolatile memory for storing predetermined setting data in the data, and a control device for automatically storing the predetermined setting data in the setting data stored in the RAM in the nonvolatile memory. The security device has a setting data file in which all the setting data stored in the RAM of the communication control device is written, and the security device detects when a predetermined event occurs. It is characterized by initializing the stored contents of the RAM by writing the contents of the configuration data files to the RAM of the communication control device. The security communication system according to claim 2 is a security communication system including at least a security sensor, a security device including a setting device, and a communication control device that performs bidirectional communication with a center device and exchanges data. The communication control device is a RAM that stores setting data that defines operating conditions of the communication control device.
And a non-volatile memory in which predetermined setting data in the setting data stored in the RAM is stored, and a predetermined setting data in the setting data stored in the RAM are automatically stored in the non-volatile memory The security device has a setting data file in which all the setting data stored in the RAM of the communication control device is written, and the security device performs setting when a predetermined event occurs. When initializing the storage contents of the RAM by writing the contents of the data file to the RAM of the communication control device, only writing to the RAM is instructed, and then the contents of the setting data written to the nonvolatile memory are fetched. The contents of the setting data written in the nonvolatile memory are compared with the contents written in the setting data file, and the contents of the setting data file are compared. If you are different from the contents written in the yl, to the control unit of the communication control device,
It is characterized by instructing a process of storing predetermined setting data in the setting data stored in the RAM in the nonvolatile memory.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a first embodiment in which the present invention is applied to a security communication system including an image transmission device 1 and a communication control device 3, where reference numeral 20 denotes a setting data file. Here, the telephone line L is an analog line, and the communication control device 3 is configured by a modem. In FIG. 1, the same components as those shown in FIGS. 2 and 3 are denoted by the same reference numerals.

The control device 2 of the image transmission device 1 manages the setting data file 20. All setting data stored in the RAM of the communication control device 3 is written in the setting data file 20. When a predetermined event occurs, the control device 2 of the image transmission device 1 transmits all setting data written in the setting data file 20 prior to performing a process related to the event. And instructs the control device 4 of the communication control device 3 to store these setting data in the RAM 5. Thereby, the control device 4 of the communication control device 3
Writes these setting data in the RAM 5. Therefore,
The same setting data as the setting data written in the setting data file 20 is stored in the RAM 5. This is the initialization of the RAM 5. And RAM5
Of the image transmission apparatus 1 after the initialization of
Performs processing related to the event.

What kind of event occurs when RA
Whether to initialize M5 can be determined arbitrarily,
This may be the case where it is necessary to transmit any information to the center device, or the case where the transmission to the center device has been completed. In particular, it is important to initialize the RAM 5 when an event occurs that some information needs to be transmitted to the center device. This is because even if the storage contents of the RAM 5 are changed by the external noise until the time when the transmission to the center device is required, the transmission to the center device is performed after the RAM 5 is initialized. This is because adverse effects can be avoided by noise.

Therefore, if it is assumed that the RAM 5 is to be initialized when an event occurs that some information needs to be transmitted to the center device, the control device 2 of the image transmission device 1 will In this case, the RAM 5 is initialized at least immediately before the scheduled notification. That is, in this case, the initialization of the RAM 5 is performed periodically.

Although the first embodiment has been described above, as described above, when the control device 4 of the communication control device 3 writes some setting data to the RAM 5, the control device 4 determines whether the predetermined setting data is predetermined. Performs the process of automatically writing those data to the non-volatile memory 6. Therefore, in the first embodiment described above, the data is written to the non-volatile memory 6 every time the initialization of the RAM 5 is performed. Will be lost. However, in general, a nonvolatile memory has a limit on the number of times of writing, and if writing is performed beyond the limit, the nonvolatile memory is deteriorated and broken. Therefore, it is not desirable to perform writing to the nonvolatile memory 6 every time the RAM 5 is initialized.

Therefore, as a second embodiment, the RAM 5 of the communication control device 3 is initialized, but the number of times of writing to the nonvolatile memory 6 is kept to a minimum and the life of the nonvolatile memory 6 is shortened. A security communication system that can avoid the situation will be described.

The block configuration of this security communication system is the same as that shown in FIG. 1, but the control device 2 of the image transmission device 1 determines which setting data in the RAM 5 is to be written into the nonvolatile memory 6. It has recognized. In addition, commands to the control device 4 of the communication control device 3 include a RAM 5
There is a command for instructing only writing to the nonvolatile memory 6, a command for confirming the contents of the nonvolatile memory 6, and a command for instructing writing to the nonvolatile memory 6. Communication control device 3
Usually has such a command.

As described in the first embodiment, when a predetermined event occurs, the control device 2 of the image transmission apparatus 1 initializes the RAM 5 prior to performing a process related to the event. At the time of this initialization, first, the control device 4 of the communication control device 3 is notified of the setting data written in the setting data file 20 together with a command instructing only writing to the RAM 5. Thus, the control device 4 of the communication control device 3 writes the setting data received from the control device 2 of the image transmission device 1 only to the RAM 5, and does not write to the nonvolatile memory 6 at this time.

When the initialization of the RAM 5 is completed in this way, the control device 2 of the image transmission device 1
Is instructed to transfer setting data from the nonvolatile memory 6 to the control device 4. Thereby, the control device 4 reads the setting data stored in the non-volatile memory 6 and transfers it to the control device 2 of the image transmission device 1.

When the control device 2 of the image transmission device 1 receives the contents stored in the non-volatile memory 6 transferred from the control device 4 of the communication control device 3, it writes the contents of the setting data into the setting data file 20. Compare with the setting data contents. If the contents of all the setting data received from the control device 4 are the same as the contents written in the setting data file 20, the control device 2 does not need to rewrite the contents of the nonvolatile memory 6. After the determination, the end of the initialization is notified to the control device 4. Thus, the initialization process ends. Therefore, in this case, writing to the nonvolatile memory 6 is not performed.

However, if at least one of the contents of the setting data received from the control device 4 is different from the contents written in the setting data file 20, the control device 2 rewrites the contents of the nonvolatile memory 6. It determines that it is necessary, and notifies the control device 4 of a command to instruct writing to the nonvolatile memory 6. Thereby, the control device 4 performs a process of writing the content of the predetermined setting data in the setting data stored in the RAM 5 to the nonvolatile memory 6. As a result, the contents stored in the nonvolatile memory 6 become correct. Then, when this processing ends, the initialization processing ends.

As described above, according to this security communication system, when a predetermined event occurs, R
Since the initialization of the AM 5 is performed, adverse effects due to external noise can be avoided, and even if the storage content of the nonvolatile memory 6 is changed due to external noise or the like, the storage content can be initialized. In addition, since writing to the nonvolatile memory 6 can be minimized, the life of the nonvolatile memory 6 can be extended as much as possible.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.
Various modifications are possible. For example, in the above embodiment, the case where the telephone line L is an analog line and the communication control device 3 is a modem has been described. However, in the present invention, the telephone line L is an ISDN line, and the communication control device 3 D
The present invention can be applied to a case in which an SU is used.

In the above embodiment, a security communication system using an image transmission device has been described. However, the present invention is also applied to a security communication system using a security device having only a security sensor and a setting device. Applicable.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a security communication system according to the present invention.

FIG. 2 is a diagram illustrating a configuration example of a conventional security communication system.

FIG. 3 is a diagram showing a configuration example of a communication control device 3 when a telephone line L is an analog line.

FIG. 4 is a diagram illustrating a configuration example of a communication control device 3 when a telephone line L is an ISDN line;

[Explanation of symbols]

1 image transmission device, 2 control device, 3 communication control device
4 ... Control device, 5 ... RAM, 6 ... Non-volatile memory, 7 ...
Terminal adapter (TA), 8 ... Digital line termination (DSU), 9 ... Control device, 10 ... RAM, 11 ... Non-volatile memory, 20 ... Setting data file.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C087 AA09 BB12 BB14 CC51 DD05 EE08 FF01 FF04 FF20 FF23 GG06 GG24 GG28 GG43 GG86 5K101 KK14 NN25

Claims (2)

[Claims] 1. A security communication system including at least a security sensor, a security device including a setting device, and a communication control device for performing bidirectional communication with a center device and exchanging data. Is a RAM that stores setting data that defines operating conditions of the communication control device, a non-volatile memory that stores predetermined setting data among the setting data stored in the RAM, and a setting that is stored in the RAM. A control device for automatically storing predetermined setting data in the data in a non-volatile memory, wherein the security device is a setting data file in which all the setting data stored in the RAM of the communication control device are written. When a predetermined event occurs, the security device writes the contents of the setting data file to the RAM of the communication control device, thereby making the RA A security communication system, wherein the storage contents of M are initialized. 2. A security communication system comprising at least a security device having a security sensor and a setting device, and a communication control device for performing bidirectional communication with a center device and exchanging data. Is a RAM that stores setting data that defines operating conditions of the communication control device, a non-volatile memory that stores predetermined setting data among the setting data stored in the RAM, and a setting that is stored in the RAM. A control device for automatically storing predetermined setting data in the data in a non-volatile memory, wherein the security device is a setting data file in which all the setting data stored in the RAM of the communication control device are written. When a predetermined event occurs, the security device writes the contents of the setting data file to the RAM of the communication control device, thereby making the RA When initializing the memory contents of M,
Instructs only writing to the RAM, then takes in the contents of the setting data written to the non-volatile memory, compares it with the contents written to the setting data file, and reads the setting data written to the non-volatile memory. If the content is different from the content written in the setting data file, the predetermined setting data in the setting data stored in the RAM is stored in the non-volatile memory to the control device of the communication control device. A security communication system for instructing processing to be performed.