JP5192708B2 - Terminal device for monitoring system - Google Patents

Description

  The present invention relates to a terminal device of a monitoring system that mainly receives alert information from a sensor that performs monitoring for disaster prevention and crime prevention in a house and notifies a center device.

Conventionally, in order to perform monitoring for disaster prevention and crime prevention in a house, it has been proposed to notify a center apparatus of information acquired by a sensor installed in the house via a communication network (see, for example, Patent Document 1). ). In Patent Document 1, in order to enable reliable accumulation and transmission of this type of information, a plurality of information recording locations and a plurality of communication lines have been proposed.
JP 2006-268348 A (0020 paragraph)

  However, like the technique described in Patent Document 1, a configuration using many hardware resources is expensive. This type of device is used by making a contract with a security company that manages the center device. However, if the device is expensive, the contract fee is high and cannot be spread to general households.

  The present invention has been made in view of the above-mentioned reasons, and an object of the present invention is to provide a monitoring system that can reliably notify the center device of the type and time of occurrence of alarm information with limited hardware resources. Is to provide a terminal device.

The invention of claim 1 is a terminal device of a monitoring system that receives notification information of one or more sensors and notifies the center device, and a communication unit that communicates with the center device, and a memory that stores the sensor information. A signal processing unit that transmits notification information to the center device through the communication unit when receiving notification information from the sensor when the communication unit is communicable with the center device, and a clock unit that measures time, The storage unit has a number of storage slots determined by the total number of types of notification information for each sensor, and has a type-specific storage area for storing the notification information of sensors for each type. When notification information is received from the sensor when disconnected from the device, the notification time is acquired from the clock unit, and the notification time of the notification information stored in the corresponding storage slot of the type-specific storage area is updated. With center equipment When communication with the communication unit is restored, the contents stored in the storage unit are transmitted to the center device.

  According to a second aspect of the present invention, in the first aspect of the invention, the type-specific storage area can store the number of occurrences for each type of notification information, and the signal processing unit is connected to the center device by the communication unit. When the notification information is received from the sensor when it is disconnected, the number of occurrences stored in the type-specific storage area is integrated.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the signal processing unit is arranged in the order of the notification times stored in the type-specific storage area after the communication with the center device is recovered. The content of the storage unit is transmitted to the center device in units of notification information.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the storage unit has a non-transmission storage slot for storing a time at which the communication unit is disconnected from the center device, When the communication between the communication unit and the center device is disconnected, the signal processing unit stores the time measured by the clock unit in the non-connection storage slot, and when the communication between the communication unit and the center device is restored, the signal processing unit is stored in the storage unit. The contents are transmitted to the center device.

In the invention of claim 5, free in inventions of claim 1, wherein the storage unit includes a sequential storage area sequentially stores the alarm information of the sensor in order of occurrence, the signal processing unit, the sequential storage area While the area exists, the alert information is stored in the sequential storage area, and when the total amount of the alert information stored in the sequential storage area reaches the capacity of the area secured as the sequential storage area, the alert information is classified by type. The content stored in the storage area is transmitted to the center device when the communication between the communication unit and the center device is restored.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the storage unit includes a program region that is a program storage region that causes the signal processing unit to operate in association with the operation of the sensor. The occupation size of the sequential storage area is set according to the occupation size of the area and the program area determined by the operation of the sensor.

According to the configuration of the first aspect of the present invention, when the communication with the center apparatus is interrupted, the notification information that needs to be held until the communication is restored is stored in the storage slot for each type of the notification information. By holding the latest notification time, it is possible to know the type of notification information that has occurred and the latest time at which the notification information has occurred when communication is restored. In addition, since the notification time is stored for each type of notification information generated by the sensor in the storage unit, and one notification information is updated to the latest notification time, the type of storage area in the storage unit The capacity may be a capacity capable of providing the number of storage slots determined by the total number of types of notification information for each sensor, and can be fixedly defined if the type of notification information is known. The capacity of the storage unit can be reduced while making it possible to know whether or not the notification information has occurred. In other words, it is possible to notify the center device of the generated notification information without limiting the capacity of the storage unit.

  Assuming a case where sensors for alarming intruders are provided together with other sensors, and the notification information of each sensor is stored in the storage unit sequentially in the order of occurrence, when an overflow occurs in the storage unit, It becomes necessary to discard the information or prohibit the storage of new notification information, and in any case, the type of the generated notification information may be lost. For example, if information for an intruder is generated and then another information is continuously generated and an overflow occurs in the storage unit, if the old information is discarded, the information for the intruder is reported. Information is lost. In addition, when storing new notification information at the time of overflow is prohibited, it is not stored in the storage unit even if notification information for an intruder is generated after overflow. Therefore, in any case, the alert information for the intruder is not notified to the center device.

  On the other hand, in the configuration of the first aspect of the invention, since the notification time is updated for each type of the notification information, it is possible to notify which notification information has occurred during a period in which the center device is disconnected. It is possible to notify the center device of the occurrence of each piece of report information with a small storage capacity without causing overflow. As a result, it is possible to prevent omission of notification about the occurrence of the notification information.

  According to the configuration of the second aspect of the invention, since the notification information generated when the center device is disconnected is accumulated for each type, the number of occurrences can be known for each type of the notification information.

  According to the configuration of the invention of claim 3, since the alert information stored in the storage unit is transmitted to the center device in the order of the alert time, if the alert information is transmitted in the order of the alert time, the sensor device issues the alert information. It is possible to know the time series of the order of occurrence of information. Also, if the alert information is transmitted in the order of the alert time, the center device can know the current state monitored by the sensor at a time close to the time when the alert information is received, and can quickly respond according to the alert information. Is possible.

  According to the configuration of the invention of claim 4, the time when communication with the center device is disconnected is stored in the non-connection storage slot, and when the communication is restored, the contents stored in the storage unit are transmitted to the center device. The center device can know the current time without detecting it. In addition, since the notification information notified to the center device after the communication with the center device is recovered is meaningful only after the time when communication with the center device is disconnected, If the sorting is performed before notifying the center device of the notification information, the amount of communication with the center device is reduced, leading to a reduction in communication load or traffic.

  According to the configuration of the invention of claim 5, the sequential information storage area for sequentially storing the notification information in the order of generation is provided, and the notification information is stored in the sequential storage area while there is an empty area in the sequential storage area. Therefore, when the number of pieces of information to be generated while communication with the center device is interrupted is small, it becomes possible to notify the center device of individual information by sequentially using the storage area. . That is, it becomes possible to notify the center device in detail of the generation process of the notification information.

  According to the configuration of the invention of claim 6, the program in which the size of the occupied area is determined in accordance with the operation (type and application) of the sensor is stored in the storage unit, and the program area secured for the program in the storage unit Since the area excluding the storage area by type and the type-specific storage area is used as the sequential storage area, the occupation size of the sequential storage area can be set according to the operation of the sensor. For example, if the occupation size of the program area is small, a large sequential storage area can be secured and the notification information can be notified in detail to the center apparatus.

  In each embodiment described below, a sensor used in a house is assumed. This type of sensor includes surveillance cameras and security sensors that are installed near doors and windows that enter and exit homes to monitor the presence of intruders, fire sensors that are installed indoors to monitor the presence of smoke and flames, and equipment There are sensors that notify the end of life and failure. Each sensor has a function of issuing a notification when the monitored state changes. In the following, it is assumed that the start of the notification and the stop of the notification are basically generated as the notification information.

  Taking a security sensor that detects the opening and closing of a window as an example, the alarm is started when the window is opened, and the alarm is stopped when it is operated according to a prescribed procedure. In addition, taking a fire sensor that reports according to the smoke concentration as an example, when the smoke concentration becomes equal to or higher than the first threshold value, the alarm is started, and the smoke concentration decreases to a second threshold value (from the first threshold value). (Small) Stops alerting when it falls below. The operation of these sensors is an example, but a sensor that outputs stepwise notification information corresponding to a change in state is used instead of a continuous value.

  Further, the terminal device 1 described below constructs a monitoring system to which the sensor 3 is connected and communicates with the center device 2 via the communication network 4 as shown in FIG. As the communication network 4, a wide area network such as the Internet, a local area network, a communication network using a dedicated line, a public telephone network, or the like is used. The center device 2 is a network server and is configured using a computer. When the center device 2 receives notification information from the sensor 3 via the terminal device 1, the center device 2 notifies the administrator of the center device 2 or uses the terminal device 1. Or a notification function via the communication network 4.

(Embodiment 1)
As illustrated in FIG. 1, the terminal device 1 described in the present embodiment includes a communication unit 11 that is connected to the communication network 4 and enables communication with the center device 2. The communication unit 11 can communicate bidirectionally with the center device 2, but only the case where the terminal device 1 transmits the notification information to the center device 2 will be described below. The terminal device 1 includes a sensor input unit 12 that receives notification information from the sensor 3. One or more sensors 3 can be connected to the sensor input unit 12, and in this embodiment, a case where a plurality (three in the illustrated example) of sensors 3 are connected is illustrated. However, since even one sensor 3 generates a plurality of types of notification information (at least the start and stop of the notification), the number of sensors 3 may be one.

  The alarm information received by the sensor input unit 12 is temporarily input to the signal processing unit 10 composed of a microcomputer. Here, it is assumed that the sensor 3 basically generates two outputs, on and off, but the output of the sensor 3 is output by the signal processing unit 10 using a sensor whose output value changes continuously. You may employ | adopt the structure which judges alerting | reporting information by setting the appropriate threshold value with respect to a value. Hereinafter, even with such a configuration, the notification information of the sensor 3 is not a continuous value but means information associated with a specific meaning such as start and stop of notification.

  The terminal device 1 is provided with a storage unit 13 composed of a semiconductor memory, and the notification information received from the sensor 3 through the sensor input unit 12 is transmitted to the sensor device 2 through the communication unit 11 or stored in the storage unit 13. Stored. Further, the signal processing unit 10 is connected to a clock unit 14 that clocks the current time, and the signal processing unit 10 uses the time counted by the clock unit 14 as necessary.

  The storage unit 13 includes a program area 13a in which a program for operating the signal processing unit 10 is stored, and a data area 13b in which notification information received from the sensor 3 is stored. Although the case where the storage area of the semiconductor memory is divided into the program area 13a and the data area 13b is shown as an example, different semiconductor memories may be allocated to the program area 13a and the data area 13b. However, since the terminal device 1 is for home use, and the capacity of the storage unit 13 is limited due to demands for price and size, the storage area of one semiconductor memory is divided into a program area 13a and a data area 13b. It is desirable to use it.

  Incidentally, the data area 13b includes a type-specific storage area Da. As shown in FIG. 2, the type-specific storage area Da has a plurality of storage slots SL that are classified according to the types of notification information from the sensors 3, and each storage slot SL has a respective output for each sensor. It is possible to store an issue time that is the time when the information is generated.

  When the communication unit 11 receives communication information from the sensor 3 through the sensor input unit 12 during a period in which the communication unit 11 can communicate with the center device 2, the signal processing unit 10 reads the time from the clock unit 14 and reports the time. The time information is sent to the center device 2 as the time information, and the time information is added to the time information received from the sensor 3.

  On the other hand, even if communication between the communication unit 11 and the center device 2 is not established, the signal processing unit 10 reads the time information from the clock unit 14 when receiving the notification information from the sensor 3 through the sensor input unit 12. The time is set as the notification time. However, since communication with the center device 2 is not possible, it is impossible to transmit to the center device 2 the alert information in which the alert time received from the sensor 3 is attached to the alert information. In this case, only the notification time acquired from the clock unit 14 is stored in the storage slot SL associated with the type of the notification information. Further, when the notification time is already stored in the storage slot SL corresponding to the type of the notification information received by the signal processing unit 10, the notification time is updated. The communication unit 11 determines whether communication with the center apparatus 2 is possible or not, and notifies the signal processing unit 10 of the communication.

  In the example shown in FIG. 2, for the three sensors 3, two types of notifications, that is, the start of the report (described as “report” in the figure) and the stop of the report (described as “recovery” in the figure), respectively. A storage slot SL for storing information is provided, and a total of six storage slots SL are provided in the type-specific storage area Da. If the sensors 3 are referred to as “sensor A”, “sensor B”, and “sensor C”, respectively, the storage slot SL is assigned to the sensor A, sensor A, sensor B, and sensor B. Recovery, sensor C report, and sensor C recovery. That is, the number of storage slots SL is determined by the number of sensors 3 and the type of notification information of each sensor 3, and does not depend on the number of times of generation of the notification information from each sensor 3, so the storage capacity of the type-specific storage area Da Becomes constant.

  Now, assume that each piece of information is generated at the time t1, t2, t3, and t4 in the order of the notification of the sensor A, the recovery of the sensor B, the notification of the sensor B, and the recovery of the sensor B. There are three types of report information (sensor A report, sensor B report, sensor B recovery), and the report information recovery of sensor B occurs twice. Therefore, the notification times t1 and t3 are stored in the storage slots SL corresponding to the notification of the sensor A and the notification of the sensor B, respectively, and the recovery of the sensor B is stored in the storage slot SL corresponding to the recovery of the sensor B. The latest issue time t4 is stored.

  When the communication between the communication unit 11 and the center device 2 is restored, the signal processing unit 10 transmits the notification time stored in the type-specific storage area Da of the storage unit 13 to the center device 2. Whether or not communication with the center device 2 is possible is confirmed each time the notification information is input from the sensor 3, and if the recovery is performed at the time of confirmation, the notification time stored in the type-specific storage area Da is transmitted. To do. Since the data to be transmitted to the center device 2 is only the type of the report information and the latest report time, the communication load (traffic) does not increase so much even if there are many types of report information. After transmitting the content stored in the storage unit 13 to the center device 2, the signal processing unit 10 erases the content of the storage unit 13. However, a configuration that leaves the contents of the storage unit 13 may be adopted.

  By the way, instead of determining whether or not the communication with the center apparatus 2 has been recovered from the state where the communication with the center apparatus 2 has been interrupted, at the time when the notification information is input from the center 3, the communication with the center apparatus 2 is not performed. A configuration may be employed in which the communication unit 11 periodically confirms whether communication with the center device 2 is possible. If this configuration is adopted, the content stored in the storage unit 13 is transmitted to the center device 2 when communication with the center device 2 becomes possible without the sensor 3 generating the notification information, and the notification information is transmitted. It is possible to notify the center device 2 of the notification information without causing a significant delay from the occurrence of.

  In the above-described operation example, the signal processing unit 10 stores the notification time in the storage unit 13 only when the communication unit 11 and the center device 2 are disconnected, but in a period during which communication with the center device 2 is possible. Further, the signal processing unit 10 can store the notification time in the storage unit 13.

  The case where the notification time is left in the storage unit 13 after the notification information stored in the storage unit 13 is transferred to the center device 2, or the case where the notification time is stored in the storage unit 13 even during a period in which communication is possible. However, the notification time received by the center device 2 is not necessarily the notification information when the center device 2 is disconnected. In such a case, the notification time associated with the notification information received by the center device 2 in the past is compared with the notification time read from the storage unit 13 and received by the center device 2. Only when the received notification time does not coincide with the received notification time, it is determined that the notification information is generated when there is no communication.

(Embodiment 2)
In the first embodiment, the latest storage time is stored for each type of notification information in the type-specific storage area Da of the storage unit 13, but in the present embodiment, as shown in FIG. In the slot SL, it is possible to accumulate and store the number of occurrences for each type of report information generated when communication between the communication unit 11 and the center apparatus 2 is not established. The signal processing unit 10 accumulates the number of occurrences.

  Now, the notification information is in the order of the notification times t1 and t2 in the order of the notification of the sensor A, the recovery of the sensor B, the notification of the sensor B, the notification of the sensor A, the recovery of the sensor B, and the notification of the sensor C. , T3, t4, t5, t6. There are four types of notification information (sensor A report, sensor B report, sensor B recovery, sensor C report), and the report information of sensor A report and sensor B recovery is Each occurs twice. When the report information is generated as described above, t3 and t6 are stored as the report times in the storage slots SL corresponding to the report of the sensor B and the report of the sensor B, respectively. 1 is stored respectively. Further, t4 and t5 are stored as notification times and 2 as the number of notifications, respectively, in the storage slots SL corresponding to the notification of the sensor A and the recovery of the sensor B.

  With the above-described operation, it is possible to obtain the number of times of occurrence of the alarm information when the communication unit 11 and the center apparatus 2 are disconnected, and notify the center apparatus 2 after the communication is restored. The center device 2 can know the number of occurrences of each type of report information, and can deal with it according to the type of report information. Other configurations and operations are the same as those of the first embodiment.

  In the first embodiment and the second embodiment, when the communication is recovered from the disconnection, the notification time and the number of notifications stored in the storage unit 13 are transmitted to the center device 2, but the transmission order is not particularly defined. Usually, it is assumed that data is transmitted in the order of addresses corresponding to the storage slots SL of the type-specific storage area Da. That is, since the transmission information is transmitted in the storage order in the type-specific storage area Da regardless of whether the notification information is new or old, the center apparatus performs processing for rearranging the notification information in order of occurrence or extracting the notification information closest to the reception time. 2 need to be done.

  On the other hand, the signal processing unit 10 of the terminal device 1 pays attention to the issue time of the issue information stored in the type-specific storage area Da, and sends each issue information to the center device 2 in the order of the issue times. You may employ | adopt the structure which transmits. When the notification information is transmitted in the order of the oldest notification time, the time series of the generation order of the notification information can be known without increasing the processing load on the sensor device 2. Further, when transmitting the notification information in the order of the newest notification time, the latest monitoring information close to the reception time of the notification information is received without increasing the processing load in the center device 2, thereby generating the notification information. A quick response is possible.

  In the example shown in FIG. 3, if the notification information is transmitted to the center device 2 in the order of the notification time, the notification of the sensor B, the notification of the sensor A, the recovery of the sensor B, the notification of the sensor C The leaf law information will be transmitted in this order.

(Embodiment 3)
In the first embodiment and the second embodiment, the time when communication between the terminal device 1 and the center device 2 is not particularly managed is not managed, and the notification information other than the period during which communication is not performed in the type-specific storage area Da. If the contents are stored, or if the contents of the type-specific storage area Da are not erased when recovering from the disconnection, it is difficult to determine whether or not the notification information is generated during the disconnection period.

  In the present embodiment, as shown in FIG. 4, the storage unit 13 is provided with a non-access storage slot SL1 for storing the time when communication with the center apparatus 2 is disconnected, in addition to the storage slot SL of the type-specific storage area Da. Yes. When the communication between the communication unit 11 and the center device 2 is disconnected, the signal processing unit 10 acquires the time counted by the clock unit 14, and stores this time as the disconnection start time in the disconnection storage slot SL1.

  Since the signal processing unit 10 acquires the communication state when trying to transmit the notification information received from the sensor 3 to the center device 2, the communication start time is the first time that the communication information is not transmitted. It will be received time. Therefore, if the same notification information is not input during a period in which communication is interrupted, the notification time stored in one of the storage slots SL and the disconnection start time stored in the disconnection storage slot SL1 match.

  When the communication with the center device 2 is restored, the disconnection start time stored in the disconnection storage slot SL1 is combined with the alert information (the type of alert information and the latest alert time) stored in the storage unit 13, and the center device 2 Sent to. After transmitting the disconnection start time and the notification information to the center apparatus 2, the signal processing unit 10 deletes the contents of the disconnection storage slot SL1. Since the disconnection start time stored in the disconnection storage slot SL1 is transmitted to the center device 2 in association with the notification information stored in the storage slot SL, the disconnection storage slot SL1 is stored together with the storage slot SL in the type-specific storage area Da. It is prepared in.

  Since the center device 2 can know the time of the disconnection by receiving the disconnection start time together with the notification information, the communication is performed by comparing the notification time included in the notification information with the disconnection start time. It is possible to acquire the type of the notification information input to the terminal device 1 and the latest time during the period in which the communication is interrupted.

  Instead of transferring the disconnection start time to the center device 2 and comparing the notification time with the center device 2, the signal processing unit 10 compares the disconnection start time with the notification time, and communication is recovered after the disconnection start time. If the operation of transmitting only the alert information that is the alert time until the center device 2 is adopted, the alert information previously transmitted to the center device 2 is not redundantly transmitted, and the communication amount is reduced. Therefore, communication load or traffic can be reduced. Other configurations and operations are the same as those in the first and second embodiments.

(Embodiment 4)
In each of the embodiments described above, the configuration in which the type-specific storage area Da is provided in the storage unit 13 has been described. However, although the type-specific storage area Da stores the latest notification time for each type of notification information. The time of occurrence for each piece of report information cannot be stored. In the period in which communication with the center device 2 is possible, the notification information is sequentially transmitted to the center device 2 every time it is generated, whereas the amount of information that can be notified to the center device 2 regarding the notification information when communication is interrupted is large. Thus, the center device 2 cannot analyze the report information in detail during the period in which the communication is interrupted.

  Therefore, in the present embodiment, in order to suppress a reduction in the information amount of the notification information without increasing the storage capacity of the storage unit 13, as shown in FIG. An area excluding an area of a certain capacity secured as the storage area Da is used as a sequential storage area Db for sequentially storing the alert information of the sensor 3 in the order of occurrence. In the sequential storage area Db, a pair of the type of issue information and the issue time is stored.

In the sequential storage area Db, the notification information is sequentially stored in the order of occurrence, but since the capacity of the sequential storage area Db is limited, the disconnection period with the center apparatus 2 becomes longer, or the frequency of the generation of the notification information. When becomes high, there is no free space, and it becomes impossible to store the notification information. In order to solve this problem, in the signal processing unit 10, when the total amount of the notification information stored in the sequential storage area Db reaches the capacity of the area secured as the sequential storage area Db, the notification is performed in the storage unit 13. The area for storing the information is changed, and the notification information is stored in the type-specific storage area Da. With this operation, the sequential storage area Db can be used together with the type-specific storage area Da. In FIG. 5, notification times t _{01 to} t ₀₈ indicate times before time t ₁ which is the first notification time in the type-specific storage area Da, and t ₀₁ , t ₀₂ , t _03,. time has elapsed in the order of t _08. In other words, time _{t 08} represents the latest time.

  The operation of this embodiment is summarized in FIG. In the operation illustrated in FIG. 6, the content stored in the storage unit 13 is stored in the center device 2 when communication with the center device 2 becomes possible regardless of whether or not the notification information is input from the sensor 3. The operation to transmit is adopted.

  That is, when the notification information is input from the sensor 3 (S1), if the communication with the center device 2 is successful (S2), the notification information is transmitted to the center device 2 and is normally terminated (S3). If the communication is not successful in step S2, that is, if the communication with the center apparatus 2 is not possible, the capacity of the notification information occupied in the sequential storage area Db is confirmed (S4). Here, if the alert information can be stored in the sequential storage area Db, the alert information is stored in the sequential storage area Db (S5). If the alert information cannot be stored in the sequential storage area Db, the alert information is stored. The format is changed (S6), and the notification information is stored in the type-specific storage area Da (S7).

  On the other hand, during the period when the alert information is not input from the sensor 3 in step S1, the presence or absence of the alert information stored in the storage unit 13 is confirmed (S8), and if the alert information exists, the center device 2 Whether or not communication is possible is confirmed (S9). Here, if communication with the center apparatus 2 is possible, the notification information preserve | saved at the memory | storage part 13 will be transmitted to the center apparatus 2 (S10). Through the above operation, the notification information generated while communication with the center device 2 is disconnected is stored in the type-specific storage area Da and the sequential storage area Db, and after the communication is recovered, the notification information is stored in the center. It is possible to communicate with the device 2.

  By the way, when the sequential storage area Db is filled with the notification information and the notification information is stored in the type-specific storage area Da, if the notification information is not stored in the sequential storage area Db, communication is interrupted. If the period becomes longer, the notification information stored in the sequential storage area Db becomes obsolete, and there is a possibility that notification to the center device 2 is useless. Therefore, when the notification information is generated after the sequential storage area Db is filled with the notification information, the oldest notification information stored in the sequential storage area Db is erased and replaced with the latest notification information. To. This process is the same as that of the queue. Even if the sequential storage area Db is filled with the notification information, new notification information is stored in the sequential storage area Db. The notification information stored in the type-specific storage area Da is only the latest notification information for each sensor 3, but as described above, by sequentially updating the notification information in the storage area Db, each sensor 3 Since it is possible to grasp to some extent not only the latest notification information about the event, it becomes possible to analyze the event of the disconnection in more detail.

  When the communication is restored, the notification information stored in the sequential storage unit Db is transmitted to the center device 2 together with the notification information stored in the type-specific storage area Da. Further, after the notification information stored in the sequential storage unit Db is transmitted to the center device 2, the contents of the sequential storage area Db are erased. That is, the sequential storage area Db is always in an empty state when communication is interrupted.

  By the operation of the present embodiment, not only the latest issue time for each type of issue information is recorded during a period in which communication with the center apparatus 2 is interrupted, but also the issue information in the order of occurrence as much as possible. Since the information is recorded, the center device 2 can reliably know the type of the notification information generated during the non-communication period by using both pieces of information, and the case where the same type of the notification information occurs more than once. Even in such a case, since the order of occurrence can be known to some extent, even when the storage unit 13 with a limited capacity is used, the amount of information received by the center device 2 for the notification information generated during the communication interruption period is increased and detailed. Analysis becomes possible. This embodiment can be used in combination with each of the embodiments described above.

  In the above operation, only the data area 13b of the storage unit 13 has been described. However, the storage unit 13 includes a program area 13a together with the data area 13b (see FIG. 1). When the capacity of the program area 13a is fixedly determined, the capacity of the storage unit 13 is effectively used even in the above-described operation. However, depending on the number of sensors 3 and the type of sensor 3, the program area 13a Capacity may change.

  For example, if a monitoring camera is connected to the terminal device 1 as the sensor 3 and the parameters for controlling each monitoring camera are stored in the program area 13a, the number of monitoring cameras to be connected is shown in FIG. As a result, the capacity of the program area 13a changes. Even if the information to be transmitted to the center device 2 is simple notification information of notification and recovery, the terminal device 1 may perform a process of extracting specific information from the information obtained by the sensor 3. For example, the signal processing unit 10 may determine whether to issue or recover the output value of the sensor 3. In such a case, the capacity of the program area 13a varies depending on the type and number of sensors 3.

  Since the capacity occupied by the program area 13a and the type-specific storage area Da is determined by the type and number of the sensors 3, the storage unit 13 sequentially stores the storage area Db according to the occupation size of the program area 13a and the type-specific storage area Da. If the occupied size is adjusted, the occupied size of the sequential storage area Db becomes variable, and the limited capacity of the storage unit 13 is effectively used. That is, if the occupation size of the program area 13a is small, a large sequential storage area Db can be secured and the notification information can be notified in detail to the center device. If the occupation size of the program area 13a is large, the sequential storage area Db is small. However, by using the notification information stored in the type-specific storage area Da, it is possible to notify the center device 2 of the type of the notification information that has occurred even when communication is interrupted.

It is a block diagram which shows this invention. 3 is a diagram illustrating an example of use of a storage unit in Embodiment 1. FIG. 6 is a diagram illustrating an example of use of a storage unit in Embodiment 2. FIG. 10 is a diagram illustrating an example of use of a storage unit in Embodiment 3. FIG. It is a figure which shows the usage example of the memory | storage part in Embodiment 4. It is operation | movement explanatory drawing same as the above. It is a figure which shows the other usage example of a memory | storage part in the same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Terminal device 2 Center apparatus 3 Sensor 10 Signal processing part 11 Communication part 12 Sensor input part 13 Memory | storage part 13a Program area 13b Data area 14 Clock part Da Type-specific storage area Db Sequential storage area SL1 Non-connection storage slot SL Storage slot

Claims (6)

A the alarm information of one or more sensors a terminal device of a monitoring system notifying the receiving center apparatus, and a communication unit for communicating with the center apparatus, a storage unit for storing the alarm information of the sensor, the communication comprising a signal processing unit for parts is to transmit the alarm information through the communication unit and receives the alarm information from the sensor when it is capable of communicating with the center apparatus to the center apparatus, and a clock unit for measuring time, the storage unit includes a type storage area for storing the alarm information of the sensor for each type has a number of storage slots determined by the total number of types of alarm information for each said sensor, said signal processing unit upon receiving the alarm information from the sensor when the communication unit is disconnected with said center apparatus, and obtains the alarm time from the clock unit, rank in the memory slot corresponding to the type storage area The alarm update the alarm time information, the terminal of the monitoring system and transmitting the contents communication with the center apparatus and the communication unit is stored in the storage unit to be restored to the center apparatus to apparatus.   The type-specific storage area can store the number of occurrences for each type of notification information, and the signal processing unit receives notification information from the sensor when the communication unit is disconnected from the center device. 2. The terminal device of a monitoring system according to claim 1, wherein the number of occurrences stored in the type-specific storage area is integrated. The signal processing unit, after the communication with the center apparatus is recovered, transmitting the contents of the storage unit alarm information units in the order of alarm time stored in the Type storage area to the center device The terminal device of the monitoring system according to claim 1, wherein the terminal device is a monitoring system. The storage unit includes a non-deliverable storage slots for storing the time at which the communication unit has been suspended and the center apparatus, the signal processing unit, the said communication of the communication unit and said center device is disconnected Watch storing the time instant being clocked to the interrupted storage slot section, and transmits the content by the communication of the communication unit and the center apparatus is stored in the storage unit to be restored to the center apparatus according The terminal device of the monitoring system according to any one of claims 1 to 3. The storage unit includes a sequential storage area sequentially stores the alarm information of the sensor in order of occurrence, the signal processing unit, wherein the sequential storage area alarm information while the free space exists in the sequential storage area stored in said storing sequentially alarm information reaches the capacity of the area reserved amount of alarm information stored in the storage area as said sequential storage area by type storage area, the said communication unit terminal device of the monitoring system according to claim 1, wherein the content of communication with the center apparatus is stored in the storage unit to recover and transmits to the center apparatus. The storage unit has a storage area in which the program area of the program for operating in association with the signal processing unit on the operation of the sensor, occupancy size of the Type storage area and program area determined by the operation of the sensor 6. The terminal device of the monitoring system according to claim 5, wherein an occupation size of the sequential storage area is set in accordance with the terminal.

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