Abnormality detection system, management device and repeating device

Abstract

To improve a reliability of linkage operations between multiple groups in a system that detects abnormalities grouped into the multiple groups.SOLUTION: An abnormality detection system comprises: an abnormality detection device that belongs to a first group and detects an abnormality when the abnormality occurs; two or more repeating devices that belong to the first group; an abnormality detection device that belongs to a second group and detects an abnormality when the abnormality occurs; and two or more repeating devices that belong to the second group, wherein: each of the two or more repeating devices belonging to the first group is paired with any one of the two or more repeating devices belonging to the second group; and when the abnormality detection device belonging to the first group detects the abnormality, at least one repeating device of the two or more repeating devices belonging to the first group notifies a repeating device of the abnormality detection that is paired with the own device of the two or more repeating devices belonging to the second group.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an anomaly detection system, a management device, and a relay device. [Background technology]

[0002] There are known techniques for improving the reliability of communications between multiple devices (e.g., alarm devices) installed in buildings. For example, Literature 1 describes a technique in which the radio wave environment between alarm devices in an alarm system is periodically monitored, and the optimum communication route and transmission power for the radio wave environment at that time is automatically set to prevent communication failures. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-178937 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to improve the reliability of the cooperation between multiple groups in a system for detecting anomalies that are grouped into multiple groups. [Means for solving the problem]

[0005] One aspect of the present invention is an anomaly detection system comprising: an anomaly detection device belonging to a first group that detects an anomaly when the anomaly occurs; two or more relay devices belonging to the first group; an anomaly detection device belonging to a second group that detects an anomaly when the anomaly occurs; and two or more relay devices belonging to the second group, wherein each of the two or more relay devices belonging to the first group is paired with one of the two or more relay devices belonging to the second group; and when the anomaly detection device belonging to the first group detects an anomaly, at least one of the two or more relay devices belonging to the first group notifies the relay device that is paired with it among the two or more relay devices belonging to the second group of the detection of the anomaly.

[0006] Another aspect of the present invention is an anomaly detection system comprising: an anomaly detection device belonging to a first group that detects an anomaly when the anomaly occurs; a relay device belonging to the first group; an anomaly detection device belonging to a second group that detects an anomaly when the anomaly occurs; and two or more relay devices belonging to the second group, wherein the relay devices belonging to the first group are capable of communicating with each of the two or more relay devices belonging to the second group; and wherein, when the anomaly detection device belonging to the first group detects an anomaly, the relay device belonging to the first group notifies at least one of the two or more relay devices belonging to the second group of the detected anomaly.

[0007] Another aspect of the present invention is an anomaly detection system comprising: an anomaly detection device belonging to a first group that detects an anomaly when the anomaly occurs; an anomaly detection device belonging to a second group that detects an anomaly when the anomaly occurs; and two or more relay devices that belong to both the first group and the second group, wherein when the anomaly detection device belonging to the first group detects an anomaly, at least one of the two or more relay devices notifies one of the devices belonging to the second group of the detected anomaly.

[0008] Another aspect of the present invention is a management device that, when one or more anomaly detection devices detects an anomaly, receives a notification of the anomaly detection and notifies at least one of two or more relay devices belonging to a first group that are capable of communicating with the one or more anomaly detection devices and with devices belonging to a second group different from the first group to which the management device belongs.

[0009] Another aspect of the present invention is a relay device that, when one or more anomaly detection devices detects an anomaly, receives a notification of the anomaly detection and notifies at least one of two or more relay devices that belong to a second group different from the one or more anomaly detection devices and a first group to which the relay device itself belongs. [Effects of the Invention]

[0010] According to the present invention, in a system for detecting anomalies grouped into a plurality of groups, it is possible to improve the reliability of the cooperation between the plurality of groups. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of an anomaly detection system. [Figure 2] FIG. 2 is a diagram illustrating an example of a hardware configuration of an anomaly detection device. [Figure 3] FIG. 2 is a diagram showing an example of the functional configuration of an anomaly detection device. [Figure 4] FIG. 2 is a diagram showing an example of the functional configuration of a repeater. [Figure 5] FIG. 10 is a diagram showing the sequence of a series of processes performed by the anomaly detection system when a slave device in group G1 detects an anomaly. [Figure 6] FIG. 10 is a diagram showing an example of the configuration of an anomaly detection system according to Modification 2. [Figure 7] FIG. 11 is a diagram showing an example of the configuration of an anomaly detection system according to Modification 3. DETAILED DESCRIPTION OF THE INVENTION

[0012] 1. Configuration The configuration of an anomaly detection system 1 according to one embodiment of the present invention will be described below. FIG. 1 is a diagram showing an example of the configuration of the anomaly detection system 1. The anomaly detection system 1 has groups exemplified by groups G1 and G2. Each group has a parent device 11, a child device 12a, a child device 12b, a repeater 13a, and a repeater 13b (parent device 11 is an example of a management device, and repeaters 13a and 13b are examples of repeater devices).

[0013] Hereinafter, when there is no need to distinguish between the slave devices 12a and 12b, they will be collectively referred to as "slave devices 12." Also, hereinafter, when there is no need to distinguish between the repeaters 13a and 13b, they will be collectively referred to as "repeaters 13." The master device 11 and the slave devices 12 each have a function for detecting abnormalities (details will be described later). Hereinafter, when there is no need to distinguish between the master device 11 and the slave devices 12, they will be collectively referred to as "abnormality detection devices 10."

[0014] Master device 11 can communicate wirelessly with slave devices 12 and repeaters 13 in the same group. Repeaters 13a belonging to each of the two groups are paired with each other, and these repeaters 13a can communicate wirelessly with each other. Similarly, repeaters 13b belonging to each of the two groups are paired with each other, and these repeaters 13b can communicate wirelessly with each other.

[0015] 1 has two groups, but this number may be three or more. Also, while the number of slave devices 12 is two, this number may be one, or three or more.

[0016] The anomaly detection system 1 is installed in a building. A building may be, for example, an apartment complex or other housing complex, a hotel, an office building, or a commercial facility. The anomaly detection device 10 detects the occurrence of an anomaly in the space in which the device is installed. Anomalies include, for example, a fire, a gas leak, or the intrusion of a suspicious person. Furthermore, when the anomaly detection device 10 detects the occurrence of an anomaly, it transmits a notification of the anomaly detection to other anomaly detection devices 10 and the repeater 13.

[0017] 2 is a diagram illustrating an example of the hardware configuration of the anomaly detection device 10. The anomaly detection device 10 includes a processor 151, a sensor 152, a speaker 153, a communication IF (Interface) 154, and a memory 155.

[0018] The processor 151 executes a program for the anomaly detection device 10 stored in the memory to control the operations of the other components of the anomaly detection device 10. The sensor 152 detects an anomaly that occurs within the monitoring area.

[0019] The sensor 152 is, for example, a smoke sensor that detects smoke, a heat sensor that detects heat above a predetermined temperature, a flame sensor that detects flames from captured images, a gas sensor that detects gas, a human sensor that detects moving objects, an opening / closing sensor that detects the opening and closing of doors and windows, etc. Note that the sensor 152 may include multiple sensors.

[0020] The speaker 153 emits sound.

[0021] The communication IF 154 communicates with a communication partner device. In this embodiment, the communication IF 154 wirelessly communicates with different communication partners simultaneously and in parallel over two channels. In FIG. 1, the communication indicated by the solid arrows is performed on channel CH1, and the communication indicated by the dashed arrows is performed on channel CH2. In this application, "simultaneous and in parallel" means that at least some of the different processes are performed during the same period.

[0022] The memory 155 stores various data. The memory 155 includes a nonvolatile memory that continuously stores data even when the power supply is cut off, and a volatile memory that cannot retain data when the power supply is cut off. The nonvolatile memory stores a program for the anomaly detection device 10.

[0023] Fig. 3 is a diagram showing an example of the functional configuration of the anomaly detection device 10. When the processor 151 of the anomaly detection device 10 executes a program for the anomaly detection device 10 stored in the memory 155, the hardware of the anomaly detection device 10 (see Fig. 2) functions as a device having the components shown in Fig. 3. The anomaly detection device 10 has, as functional components, detection means 101, transmission means 102, reception means 103, alarm transmission means 104, and storage means 105.

[0024] The detection means 101 is realized by a sensor 152 that operates under the control of a processor 151, and detects abnormalities.

[0025] The transmitting means 102 is realized by the communication IF 154 operating under the control of the processor 151, and transmits various information to the device with which it communicates. For example, when the detecting means 101 of the slave device 12 detects an abnormality, the transmitting means 102 of the slave device 12 transmits an abnormality detection notification to the master device 11 informing the master device of the abnormality. Furthermore, when the receiving means 103 of the master device 11 receives an abnormality detection notification from any of the slave devices 12, the transmitting means 102 of the master device 11 transmits an abnormality detection notification to each of the slave devices 12 and the repeater 13. Furthermore, when the receiving means 103 of the master device 11 receives an abnormality detection notification from any of the repeaters 13 informing the master device 11 of an abnormality detected by an abnormality detection device 10 of another group, the transmitting means 102 of the master device 11 transmits an abnormality detection notification to each of the slave devices 12 and the repeater 13.

[0026] The receiving means 103 is realized by the communication IF 154 that operates under the control of the processor 151, and receives various information transmitted from the communication partner device. The information received by the receiving means 103 includes the above-mentioned notification of abnormality detection transmitted from the communication partner device.

[0027] The alarm issuing means 104 is realized by a speaker 153 that operates under the control of the processor 151, and when an abnormality occurs, it notifies surrounding people (including devices such as robots) of the abnormality, i.e., issues an alarm, by continuously emitting an audio alarm message. The occurrence of an abnormality at which the alarm issuing means 104 issues an alarm is when the detection means 101 of the device itself detects an abnormality, or when either another anomaly detection device 10 of the same group or an anomaly detection device 10 of another group detects an abnormality and the receiving means 103 of the device itself receives a notification of the abnormality detection.

[0028] The storage means 105 is realized by a memory 155 that operates under the control of the processor 151, and stores various types of information. The various types of information stored in the storage means 105 include, in addition to the program for the anomaly detection device 10 described above, for example, a device ID (identifier) ​​that identifies the device itself from other devices, a group ID (identifier) ​​that identifies the group to which the device itself belongs from other groups, information indicating whether the device itself is the parent device 11 or the child device 12, sound waveform data that represents the sound waveform of the alarm message sounded by the alarm issuing means 104, and the like.

[0029] Next, the configuration of the repeater 13 will be described. The hardware configuration of the repeater 13 differs from the hardware configuration of the anomaly detection device 10 (see FIG. 2) in that the repeater 13 does not include the sensor 152 and the speaker 153. That is, the repeater 13 includes a processor, a communication IF, and a memory similar to the processor 151, the communication IF 154, and the memory 155 of the anomaly detection device 10. However, the memory of the repeater 13 stores a program for the repeater 13.

[0030] Fig. 4 is a diagram showing an example of the functional configuration of repeater 13. When a processor of repeater 13 executes a program for repeater 13 stored in memory, the hardware of repeater 13 functions as a device having the components shown in Fig. 4. Repeater 13 has transmitting means 131, receiving means 132, and storage means 133 as functional components.

[0031] The transmitting means 131 is realized by a communication IF that operates under the control of the processor, and transmits various information to the device with which it is communicating. For example, when the receiving means 132 of the device itself receives a notification of abnormality detection from a master device 11 of the same group, the transmitting means 131 transmits the notification of abnormality detection to a repeater 13 paired with the device itself of another group. Furthermore, when the transmitting means 131 receives a notification of abnormality detection from a repeater 13 paired with the device itself of another group, the transmitting means 131 transmits the notification of abnormality detection to a master device 11 of the same group.

[0032] The receiving means 132 is realized by a communication IF that operates under the control of the processor, and receives various information transmitted from a device with which the communication is made. For example, if any of the anomaly detection devices 10 in the same group detects an anomaly, the receiving means 132 receives a notification of the anomaly detection from the master device 11 in the same group. Also, if any of the anomaly detection devices 10 in another group detects an anomaly, the receiving means 132 receives a notification of the anomaly detection from the repeater 13 paired with the device in the other group.

[0033] Storage means 133 is realized by a memory that operates under the control of a processor, and stores various types of information. The various types of information stored in storage means 133 include, in addition to the program for repeater 13 described above, a device ID (Identifier) ​​that identifies the repeater itself from other devices, a group ID (Identifier) ​​that identifies the group to which the repeater itself belongs from other groups, and the group IDs and device IDs of repeaters 13 of other groups paired with the repeater itself.

[0034] 2.Operation Next, a series of operations performed by the anomaly detection system 1 when it detects an anomaly will be described using the case where the slave device 12a of group G1 detects an anomaly as an example. Fig. 5 is a diagram showing the sequence of a series of processes performed by the anomaly detection system 1 when the slave device 12a of group G1 detects an anomaly. Note that when the anomaly detection device 10 itself detects an anomaly or when it receives a notification of an anomaly detection from a device with which it is communicating, it starts issuing an alert using the alert issuing means 104. However, since the operations related to alert issuing are not a feature of the present invention, the processes related to alert issuing are not shown in Fig. 5, and further, in the following description, an explanation related to alert issuing will be omitted.

[0035] In the following description, for example, a slave device 12a of group G1 will be referred to as a "G1 slave device 12a" by adding the symbol of the group (G1 or G2) to the beginning to indicate the group to which the device belongs.

[0036] First, when an abnormality occurs near the G1 slave device 12a, the G1 slave device 12a detects the abnormality (step S101).

[0037] When the G1 slave device 12a detects an abnormality in step S101, it transmits a notification of the abnormality detection to the G1 master device 11 (step S102).

[0038] When the G1 parent device 11 receives a notification of abnormality detection from the G1 child device 12a in step S102, it transmits a notification of abnormality detection to the G1 child device 12b and the G1 repeater 13a on channel CH1, and simultaneously transmits a notification of abnormality detection to the G1 repeater 13b on channel CH2 (see Figure 1) (step S103).

[0039] When the G1 repeater 13a receives the notification of abnormality detection from the G1 parent device 11 in step S103, it transmits the notification of abnormality detection to the G2 repeater 13a on channel CH1 (step S104). Concurrently, when the G1 repeater 13b receives the notification of abnormality detection from the G1 parent device 11 in step S103, it transmits the notification of abnormality detection to the G2 repeater 13b on channel CH2 (step S104).

[0040] Note that the transmission of the notification of abnormality detection from the G1 repeater 13a to the G2 repeater 13a and the transmission of the notification of abnormality detection from the G1 repeater 13b to the G2 repeater 13b are performed simultaneously in parallel as described above, but in Figure 5, the latter process is depicted below the former process. This is for convenience of illustration and does not mean that the latter process is performed after the former process. In Figure 5, processes with the same step number (S104, etc.) indicate that they are performed simultaneously in parallel, regardless of their position in the vertical direction of the figure.

[0041] When the G2 repeater 13a receives the notification of abnormality detection from the G1 repeater 13a in step S104, it transmits the notification of abnormality detection to the G2 parent device 11 on channel CH1 (step S105). Concurrently, when the G2 repeater 13b receives the notification of abnormality detection from the G1 repeater 13b in step S104, it transmits the notification of abnormality detection to the G2 parent device 11 on channel CH2 (step S105).

[0042] When G2 master device 11 receives notification of abnormality detection from at least one of G2 repeater 13a and G2 repeater 13b in step S105, it transmits notification of abnormality detection to G2 slave devices 12a and G2 slave devices 12b on channel CH2 (step S106).

[0043] The above is a series of processes performed when the anomaly detection system 1 detects an anomaly. In the above-described anomaly detection system 1, if an anomaly is detected in either group G1 or group G2, the other group is notified of the anomaly, and all of the anomaly detection devices 10 in groups G1 and G2 issue an alert. As a result, people in and around the space where the anomaly detection device 10 of group G1 is installed, and people in and around the space where the anomaly detection device 10 of group G2 is installed, can be notified of the occurrence of an anomaly.

[0044] Unlike anomaly detection systems according to the prior art that perform linked reporting between multiple groups, the anomaly detection system 1 has multiple communication paths between different groups (two paths in the above-described embodiment). Therefore, even if a failure occurs in one of the multiple communication paths, linked reporting between multiple groups will be performed normally as long as normal communication is performed via the remaining communication paths.

[0045] For example, even if the notification of abnormality detection from G1 repeater 13a to G2 repeater 13a does not reach due to some failure in step S104, if the notification of abnormality detection is normally sent from G1 repeater 13b to G2 repeater 13b, G2 master device 11 can receive the notification of abnormality detection from G2 repeater 13b in step S105 and transmit the notification of abnormality detection to G2 slave devices 12a and G2 slave devices 12b in step S106. As a result, all abnormality detection devices 10 in groups G1 and G2 can normally issue an alarm.

[0046] As described above, the anomaly detection system 1 issues an alarm with higher reliability when an anomaly is detected compared to the prior art.

[0047] 3. Variations The above-described embodiment is one embodiment of the present invention, and can be modified in various ways within the scope of the technical concept of the present invention. Examples of such modifications are shown below. Note that two or more of the following modifications may be combined as appropriate.

[0048] [1] Variation 1 In the above-described embodiment, the communication IFs provided in each of the anomaly detection device 10 and the repeater 13 are capable of communication over two different channels. However, a configuration in which the communication IFs provided in each of the anomaly detection device 10 and the repeater 13 are capable of communication over only one channel may also be employed. In the anomaly detection system 1 in which the communication IFs provided in each of the anomaly detection device 10 and the repeater 13 are capable of communication over only one channel, multiple pairs of devices cannot communicate simultaneously in parallel. Therefore, when attempts are made to start communication between multiple pairs of devices at approximately the same time, the communication of the pair that was attempted to start first is executed, and the communication of the pair that was attempted to start later is put on hold and not executed. After that, when the executed communication ends, an attempt is made to start the put on hold communication.

[0049] Furthermore, if the communication IFs provided in each of the abnormality detection device 10 and the repeater 13 are capable of communication on only one channel, then either a configuration capable of broadcast communication or a configuration not capable of broadcast communication may be adopted between those communication IFs.

[0050] In a configuration capable of broadcast communication, for example, when the G1 parent device 11 receives a notification of abnormality detection from the G1 child device 12a, it can transmit the notification of abnormality detection to all other devices in the group G1, and the G1 child device 12a, the G1 child device 12b, the G1 repeater 13a, and the G1 repeater 13b can receive the notification of abnormality detection.

[0051] On the other hand, in a configuration in which broadcast communication is not possible, for example, when G1 parent device 11 receives a notification of abnormality detection from G1 child device 12a, it notifies the devices of the abnormality detection in sequence, for example, G1 child device 12b, G1 repeater 13a, and G1 repeater 13b. Therefore, the speed at which the notification of abnormality detection propagates is slower than in a configuration in which broadcast communication is possible.

[0052] Below is a specific example of the operation of the anomaly detection system 1 when the G1 slave device 12a detects an anomaly in an anomaly detection system 1 that is configured to enable communication between devices over only one channel and that also enables broadcast communication. First, when the G1 slave device 12a detects an anomaly, it sends a notification of the anomaly detection to the G1 master device 11.

[0053] When the G1 parent device 11 receives the abnormality detection notification from the G1 child device 12a, it broadcasts the abnormality detection notification to all devices in the group G1. The G1 child devices 12a, 12b, G1 repeaters 13a, and 13b receive the abnormality detection notification broadcast from the G1 parent device 11.

[0054] When the G1 repeater 13a receives a notification of abnormality detection from the G1 parent device 11, it attempts to transmit a notification of abnormality detection to the G2 repeater 13a. Also, when the G1 repeater 13b receives a notification of abnormality detection from the G1 parent device 11, it attempts to transmit a notification of abnormality detection to the G2 repeater 13b. These attempts to transmit the notification of abnormality detection are made almost simultaneously, but the transmission that was attempted first is executed. Now, as an example, assume that the G1 repeater 13a has transmitted a notification of abnormality detection to the G2 repeater 13a. In that case, the transmission of the notification of abnormality detection from the G1 repeater 13b to the G2 repeater 13b is not executed and is put on hold.

[0055] When the G1 repeater 13a completes sending the abnormality detection notification to the G2 repeater 13a, the G2 repeater 13a attempts to send the abnormality detection notification to the G2 parent device 11. At the same time, the G1 repeater 13b attempts to send the abnormality detection notification to the G2 repeater 13b, which it had previously reserved. These attempts to send the abnormality detection notification are made almost simultaneously, but the first attempt is executed. Now, as an example, assume that the G1 repeater 13b has sent the abnormality detection notification to the G2 repeater 13b. In that case, the transmission of the abnormality detection notification from the G2 repeater 13a to the G2 parent device 11 is not executed and is reserved.

[0056] When the G1 repeater 13b completes sending the abnormality detection notification to the G2 repeater 13b, the G2 repeater 13b attempts to send the abnormality detection notification to the G2 parent device 11. At the same time, the G2 repeater 13a attempts to send the abnormality detection notification to the G2 parent device 11 that it had previously reserved. These attempts to send the abnormality detection notification are made almost simultaneously, but the first attempt is made to send it. Now, as an example, let's assume that the G2 repeater 13a has sent the abnormality detection notification to the G2 parent device 11. In that case, the transmission of the abnormality detection notification from the G2 repeater 13b to the G2 parent device 11 is not executed and is reserved.

[0057] When G2 repeater 13a has completed sending the abnormality detection notification to G2 parent device 11, G2 parent device 11 attempts to broadcast the abnormality detection notification to all devices in group G2. At the same time, G2 repeater 13b attempts to send the abnormality detection notification to G2 parent device 11 that it had previously reserved. These attempts to send the abnormality detection notification are made almost simultaneously, but the first attempt is executed. Now, as an example, assume that G2 parent device 11 has broadcast the abnormality detection notification to all devices in group G2. In that case, the transmission of the abnormality detection notification from G2 repeater 13b to G2 parent device 11 is not executed and is instead reserved.

[0058] The notification of abnormality detection broadcast from G2 master device 11 to all devices in group G2 is received by G2 slave device 12a, G2 slave device 12b, G2 repeater 13a, and G2 repeater 13b.

[0059] When G2 repeater 13b receives the notification of abnormality detection from G2 parent unit 11, it determines that the notification of abnormality detection has already arrived to G2 parent unit 11 via another route, and does not send the pending notification of abnormality detection to G2 parent unit 11. This is because the notification of abnormality detection has already been sent to G2 parent unit 11, so it would be pointless for G2 repeater 13b to send the same information to G2 parent unit 11.

[0060] In this way, in the anomaly detection system 1, it is desirable that each device be configured not to transmit the information it received from the upstream device and should have transmitted to the downstream device if it determines that the information it received from the upstream device and should have transmitted to the downstream device has already been propagated to the downstream device by the information it received from the downstream device.

[0061] [2] Variation 2 In the anomaly detection system 1 according to the embodiment described above, each of the multiple groups includes multiple repeaters 13. As long as multiple repeaters 13 belong to at least one of the multiple groups in the anomaly detection system 1, the number of repeaters 13 belonging to each group may be changed arbitrarily.

[0062] Fig. 6 is a diagram showing an example of the configuration of an anomaly detection system 1 according to Modification 2. In the anomaly detection system 1 shown in Fig. 6, a single relay 13 belongs to group G1, and two relays 13 belong to group G2.

[0063] 6, when any of the abnormality detection devices 10 in group G1 detects an abnormality, the transmitting means 131 of the G1 repeater 13a receives a notification of the abnormality detection from the G1 parent device 11 and transmits the notification of the abnormality detection to the G2 repeater 13a and the G2 repeater 13b. Also, when any of the abnormality detection devices 10 in group G2 detects an abnormality, the G2 repeater 13a and the G2 repeater 13b, which have received the notification of the abnormality detection from the G2 parent device 11, each transmit a notification of the abnormality detection to the G1 repeater 13a.

[0064] According to the abnormality detection system 1 shown in Figure 6, even if a communication failure occurs in any of the communication paths between the G1 repeater 13a and the G2 repeater 13a, the communication path between the G1 repeater 13a and the G2 repeater 13b, the communication path between the G2 repeater 13a and the G2 parent device 11, and the communication path between the G2 repeater 13b and the G2 parent device 11, abnormality detection information is shared between the group G1 and the group G2.

[0065] 6, the G1 repeater 13a can communicate with both the G2 repeater 13a and the G2 repeater 13b. Therefore, the G1 repeater 13a can measure the radio wave strength and communication stability in wireless communication with the G2 repeater 13a and the radio wave strength and communication stability in wireless communication with the G2 repeater 13b by itself, and can also receive information about the radio wave strength and communication stability measured by each of the G2 repeaters 13a and 13b, which are its communication partners, from those devices.

[0066] Therefore, for example, as in the above-mentioned variant example 1, when communication between devices in the anomaly detection system 1 is carried out through only one channel, when a device capable of communicating with multiple other devices, such as G1 repeater 13a, needs to transmit information to each of those multiple other devices, the order in which to sequentially transmit information to the other devices may be determined based on at least one of the radio wave strength and the stability of communication.

[0067] Specifically, for example, when the G1 repeater 13a transmits a notification of abnormality detection, it may be configured to first transmit the notification of abnormality detection to one of the G2 repeaters 13a and 13b, which has a higher strength of radio waves transmitted or received between the devices, and then transmit the notification of abnormality detection to the other G2 repeater 13. Alternatively, for example, when the G1 repeater 13a transmits a notification of abnormality detection, it may be configured to first transmit the notification of abnormality detection to one of the G2 repeaters 13a and 13b, which has a higher stability of communication between the devices, and then transmit the notification of abnormality detection to the other G2 repeater 13.

[0068] According to the anomaly detection system 1 of this modified example, communication routes are used for information propagation in order of the probability of communication failure due to insufficient radio wave strength or insufficient communication stability, and therefore the probability of delays in the overall speed of information propagation is reduced compared to when communication routes are not selected based on such radio wave strength or communication stability.

[0069] [3] Variation 3 In the above-described embodiment, each of the repeaters 13 belongs to one of the groups. Alternatively, at least one repeater 13 may belong to two or more groups.

[0070] Fig. 7 is a diagram showing an example of the configuration of an anomaly detection system 1 according to Modification 3. The anomaly detection system 1 shown in Fig. 7 includes two relays 13, namely, relay 13a and relay 13b, and both of these relays 13 belong to both group G1 and group G2. That is, in the anomaly detection system 1 shown in Fig. 7, multiple relays 13 are shared by multiple groups.

[0071] In the abnormality detection system 1 shown in Figure 7, when any of the abnormality detection devices 10 in group G1 detects an abnormality, a notification of the abnormality detection is sent from the G1 parent device 11 to the repeaters 13a and 13b, and a notification of the abnormality detection is sent from each of the repeaters 13a and 13b to the G2 parent device 11.

[0072] Furthermore, in the abnormality detection system 1 shown in FIG. 7, when any of the abnormality detection devices 10 in group G2 detects an abnormality, a notification of the abnormality detection is sent from the G2 parent device 11 to the repeaters 13a and 13b, and a notification of the abnormality detection is sent from each of the repeaters 13a and 13b to the G1 parent device 11.

[0073] According to the abnormality detection system 1 shown in Figure 7, even if a communication failure occurs in any of the communication paths between the G1 parent device 11 and the repeater 13a, the communication path between the G1 parent device 11 and the repeater 13b, the communication path between the repeater 13a and the G2 parent device 11, and the path between the repeater 13b and the G2 parent device 11, abnormality detection information is shared between group G1 and group G2.

[0074] [4] Other variations (1) In the anomaly detection system 1 (see FIG. 1) according to the above embodiment, one-to-one pairing is performed between the relays 13 of different groups, and one relay 13 communicates with only one of the multiple relays 13 of the other groups. However, one relay 13 may communicate with multiple relays 13 of the other groups. For example, the G1 relay 13a may be configured to communicate with each of the G2 relays 13a and 13b, and the G1 relay 13b may be configured to communicate with each of the G2 relays 13a and 13b. In this case, communication between the group G1 and the group G2 is performed via a total of four communication paths: a communication path between the G1 relay 13a and the G2 relay 13a, a communication path between the G1 relay 13a and the G2 relay 13b, a communication path between the G1 relay 13b and the G2 relay 13a, and a communication path between the G1 relay 13b and the G2 relay 13b.

[0075] (2) In the anomaly detection system 1 according to the embodiment described above, the parent device 11 is equipped with an anomaly detection function in the same manner as the child device 12. However, the parent device 11 may not be equipped with an anomaly detection function and may be configured as a device specialized in relaying information within the group and managing other devices within the group.

[0076] (3) In the anomaly detection system 1 according to the embodiment described above, the repeater 13 does not have an anomaly detection function. However, the repeater 13 may have an anomaly detection function. Furthermore, the repeater 13 may relay information within the group and manage other devices, which are normally performed by the master device 11. In other words, any of the slave devices 12 or the master device 11 may also function as the repeater 13.

[0077] (4) In the anomaly detection system 1 according to the above embodiment, all of the slave devices 12 communicate with the master device 11 of the same group. However, a configuration may be adopted in which one or more slave devices 12 can communicate directly with a repeater 13 of the same group instead of or in addition to the master device 11.

[0078] Furthermore, for example, in the case where there is a repeater 13 that does not belong to a specific group, as in the anomaly detection system 1 according to the above-mentioned variant example 3, a configuration may be adopted in which one or more slave devices 12 do not belong to any group and communicate with the repeater 13 that does not belong to a specific group.

[0079] (5) In the anomaly detection system 1 according to the above embodiment, an alarm is issued by sound when an abnormality is detected. However, instead of or in addition to sound, an alarm may be issued by a method that is sensed by a sense other than hearing, such as light or vibration.

[0080] (6) In the anomaly detection system 1 according to the embodiment described above, communication between different devices is performed wirelessly. However, one or more of the communications may be performed by wire.

[0081] (7) In the anomaly detection system 1 according to the above embodiment, the number of channels used for wireless communication is two, but the number of channels may be three or more.

[0082] (8) The configuration of the anomaly detection system 1 described in the above-described embodiment and modified examples is merely illustrative and may be modified in various ways. For example, as described above, the number of groups into which the devices included in the anomaly detection system 1 are divided may be any number as long as it is two or more, and the number of slave devices 12 belonging to each group may be any number. Furthermore, the number of repeaters 13 belonging to one or more groups may be any number as long as it is two or more. Furthermore, for example, the channel assignments indicated by solid arrows and dashed arrows in FIG. 1 are merely examples, and other channel assignments may be adopted. For example, in FIG. 1, communications indicated by solid arrows within group G1 may be performed on channel CH1, communications indicated by solid arrows may be performed on channel CH2, communications indicated by solid arrows within group G2 may be performed on channel CH3, communications indicated by solid arrows may be performed on channel CH4, communications indicated by solid arrows between repeaters 13 may be performed on channel CH5, and communications indicated by solid arrows may be performed on channel CH6. In addition, communication between the parent device and the child device within group G1 may be performed on channel CH1, communication between the parent device and the repeater within group G1 may be performed on channel CH2, communication between the parent device and the child device within group G2 may be performed on channel CH3, communication between the parent device and the repeater within group G2 may be performed on channel CH4, and communication between the repeater in group G1 and the repeater in group G2 may be performed on channels CH5 and CH6.

[0083] (9) In the above-described embodiment, the information transmitted from one group to another via multiple communication paths is an anomaly detection notification. However, other information may be transmitted from one group to another via multiple communication paths. For example, if a device that correctly receives an anomaly detection notification returns a receipt notification of the anomaly detection notification in response, the receipt notification may be transmitted sequentially in the opposite direction to the propagation direction of the anomaly detection notification. Furthermore, for example, if an operation to stop an anomaly detection device 10 is performed on one of the anomaly detection devices 10 while the anomaly detection devices 10 are issuing an alarm after an anomaly is detected, the anomaly detection device 10 that accepted the operation may transmit a notification of the stop of alarm to the other devices sequentially. Multiple communication paths may be used when transmitting information other than the anomaly detection notification from one group to another. [Explanation of symbols]

[0084] 1...abnormality detection system, 10...abnormality detection device, 11...parent device, 12...child device, 13...repeater, 101...detection means, 102...transmission means, 103...reception means, 104...alarm means, 105...storage means, 131...transmission means, 132...reception means, 133...storage means, 151...processor, 152...sensor, 153...speaker, 154...communication IF, 155...memory.

Claims

1. an anomaly detection device that belongs to the first group and detects an anomaly when the anomaly occurs; two or more relay devices belonging to the first group; an anomaly detection device belonging to the second group that detects an anomaly when the anomaly occurs; two or more relay devices belonging to the second group; Equipped with each of the two or more relay devices belonging to the first group is paired with any one of the two or more relay devices belonging to the second group; When the anomaly detection device belonging to the first group detects an anomaly, at least one of the two or more relay devices belonging to the first group notifies a relay device paired with the relay device among the two or more relay devices belonging to the second group of the anomaly detection. Anomaly detection system.

2. When the anomaly detection device belonging to the first group detects an anomaly, each of the two or more relay devices belonging to the first group concurrently notifies the relay device paired with the own device among the two or more relay devices belonging to the second group of the anomaly detection. The anomaly detection system according to claim 1 .

3. When the anomaly detection device belonging to the first group detects an anomaly and any one of the two or more relay devices belonging to the first group successfully notifies the relay device belonging to the second group of the anomaly detection, the relay devices other than the one of the two or more relay devices belonging to the first group do not notify the relay device belonging to the second group of the anomaly detection. The anomaly detection system according to claim 1 .

4. an anomaly detection device that belongs to the first group and detects an anomaly when the anomaly occurs; a relay device belonging to the first group; an anomaly detection device belonging to the second group that detects an anomaly when the anomaly occurs; two or more relay devices belonging to the second group; Equipped with the relay device belonging to the first group can communicate with each of the two or more relay devices belonging to the second group; When the anomaly detection device belonging to the first group detects an anomaly, the relay device belonging to the first group notifies at least one of the two or more relay devices belonging to the second group of the anomaly detection. Anomaly detection system.

5. When the anomaly detection device belonging to the first group detects an anomaly, the relay device belonging to the first group notifies each of the two or more relay devices belonging to the second group of the anomaly detection in parallel. The anomaly detection system according to claim 4 .

6. When the anomaly detection device belonging to the first group detects an anomaly, if the relay device belonging to the first group has successfully notified any one of the two or more relay devices belonging to the second group of the anomaly detection, the relay device belonging to the first group does not notify any relay device of the anomaly detection that has not yet notified any one of the two or more relay devices belonging to the second group of the anomaly detection. The anomaly detection system according to claim 4 .

7. When the anomaly detection device belonging to the first group detects an anomaly, the relay device belonging to the first group selects one or more relay devices from the two or more relay devices belonging to the second group based on the state of radio waves used for communication, and notifies each of the selected one or more relay devices of the detection of the anomaly. The anomaly detection system according to claim 4 .

8. an anomaly detection device that belongs to the first group and detects an anomaly when the anomaly occurs; an anomaly detection device belonging to the second group that detects an anomaly when the anomaly occurs; two or more relay devices belonging to both the first group and the second group; Equipped with When the anomaly detection device belonging to the first group detects an anomaly, at least one of the two or more relay devices notifies any one of the devices belonging to the second group of the anomaly detection. Anomaly detection system.

9. When the anomaly detection device belonging to the first group detects an anomaly, each of the two or more relay devices notifies any one of the devices belonging to the second group of the anomaly detection in parallel. The anomaly detection system according to claim 8 .

10. When the anomaly detection device belonging to the first group detects an anomaly, if any of the two or more relay devices successfully notifies any device belonging to the second group of the anomaly detection, any of the two or more relay devices that has not yet notified any device belonging to the second group of the anomaly detection does not notify any device belonging to the second group of the anomaly detection. The anomaly detection system according to claim 8 .

11. When one or more anomaly detection devices detect an anomaly, the anomaly detection device receives a notification of the anomaly detection and notifies at least one of two or more relay devices belonging to the first group that can communicate with the one or more anomaly detection devices and devices belonging to a second group different from the first group to which the anomaly detection device belongs. Management device.

12. When one or more anomaly detection devices detect an anomaly, the anomaly detection device receives a notification of the anomaly detection and notifies the anomaly detection to at least one of the one or more anomaly detection devices and two or more relay devices that belong to a second group different from the first group to which the one or more anomaly detection devices and the device itself belong. Relay device.

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