JP2021064027A - State detection system - Google Patents

Abstract

To provide a state detection system capable of detecting a predetermined state with a simple configuration in a power saving manner.SOLUTION: A state detection system includes terminal devices and a server. The terminal device including a first sensor and a second sensor transmits first sensor information detected by the first sensor to the server. The server transmits start information to start the second sensor to the terminal device when it is determined that a state is the first state based on the first sensor information. The terminal device starts the second sensor based on the start information, and transmits second sensor information detected by the second sensor to the server. The server determines whether a state is the predetermined state based on the second sensor information.SELECTED DRAWING: Figure 1

Description

The present invention relates to a technique for detecting a predetermined state, and more particularly to a state detection system for detecting a predetermined state in a house.

Conventionally, a reporting system for preventing or early detecting lonely death has been known. For example, Patent Document 1 discloses a notification system that determines that an abnormality is not input if a detection signal from a moving object detecting means for detecting the movement of a human body is not input for a predetermined time or longer, and transmits a resident abnormality signal.

Japanese Unexamined Patent Publication No. 2015-1816

By the way, the target of such a reporting system is often the elderly. In addition, the detector used in the reporting system often requires an external power supply. Elderly people tend to unplug the power outlet to save power, and if the power cord of the detector is unintentionally unplugged, it may not be able to perform its function. In addition, as a reporting system, for example, it is conceivable to use it to prevent the indoor garbage house from being created due to the cognitive decline of the elderly.

When various unexpected situations are assumed in this way, a detector with a simpler configuration and more power saving has been required.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a state detection system capable of detecting a predetermined state with a simpler configuration and more power saving.

(1) In order to achieve the above problems, the state detection system of the present disclosure includes a terminal device and a server capable of communicating with the terminal device.

The terminal device includes a first sensor, a second sensor, a first control unit, and a first communication unit.

The first sensor outputs the sensed first sensor information. The second sensor outputs the sensed second sensor information. The first control unit controls the activation of the second sensor. The first communication unit transmits the first sensor information detected by the first sensor to the server.

The server includes a second communication unit, a determination unit, and an information creation unit.

The second communication unit can communicate with the terminal device. The determination unit determines whether or not it is in the first state based on the first sensor information received by the second communication unit. The information creation unit creates activation information for activating the second sensor based on the determination result of the first state.

The second communication unit transmits the activation information to the terminal device. The first control unit activates the second sensor based on the activation information received by the first communication unit. The first communication unit transmits the second sensor information detected by the second sensor to the server. The determination unit determines whether or not the state is the predetermined state based on the second sensor information received by the second communication unit.

(2) In the configuration of the above (1), the state detection system of the present disclosure causes the information creation unit to stop the second sensor when the determination unit determines that the state is not the predetermined state. Create stop information for. The second communication unit transmits the stop information created by the information creation unit to the terminal device.

The first control unit stops the second sensor based on the stop information received by the first communication unit.

(3) In the state detection system of the present disclosure, in the configuration of (1) or (2), the first sensor consumes less power than the second sensor.

(4) In the state detection system of the present disclosure, in the configuration of (1), (2) or (3), the first communication unit sends information to the second communication unit within a predetermined time. The number of communications to be transmitted is larger than the number of communications in which the second communication unit transmits information to the first communication unit.

(5) In the state detection system of the present disclosure, in the configuration of (1), (2), (3) or (4), the first communication unit performs the second communication within a predetermined time. The amount of communication for transmitting information to the unit is larger than the amount of communication for the second communication unit to transmit information to the first communication unit.

(6) In the state detection system of the present disclosure, in the configuration of (1), (2), (3), (4) or (5), the terminal device is driven by a battery.

(7) In the state detection system of the present disclosure, in the configuration of (1), (2), (3), (4), (5) or (6), the first sensor is a brightness sensor. It is either a motion sensor or a microphone, and the second sensor is an odor sensor.

According to the present invention, it is possible to provide a state detection system capable of detecting a predetermined state with a simpler configuration and more power saving.

It is a schematic block diagram of the state detection system which concerns on one Embodiment. It is a schematic block diagram of the terminal apparatus which concerns on one Embodiment. It is a schematic block diagram of the server which concerns on one Embodiment. FIG. 5 is a flowchart showing a processing flow of the state detection system according to the embodiment together with FIG. FIG. 4 is a flowchart showing a processing flow of the state detection system according to the embodiment together with FIG. It is a table which shows the sensor switching pattern in the state detection system which concerns on one Embodiment. It is a table which shows the sensor switching pattern in the state detection system which concerns on one Embodiment.

FIG. 1 is a schematic configuration diagram of a state detection system 10 according to an embodiment. The state detection system 10 is an information processing system that detects a person in a house or a predetermined state of the house. Predetermined conditions include, for example, an abnormal condition in which a house has become a garbage mansion, a state in which an elderly person living alone is immobile or dead, or a state in which a person without a justifiable reason has invaded the house. An abnormal condition that has occurred. The state detection system 10 includes, for example, a terminal device 1 arranged in a residence, a server 2 arranged in a monitoring organization, a reporting device 3 arranged in a reporting organization, and a communication network 4 capable of communicating with each device. , Is included.

FIG. 2 is a schematic configuration diagram of the terminal device 1. The terminal device 1 is a device arranged one or more in the house. As the place where the terminal device 1 is arranged, for example, when detecting an abnormal state, a place where a resident lives, a place where a resident stops, or the like is preferable. Further, as a place where the terminal device 1 is arranged, for example, when detecting an illegal invasion, a room in contact with the outside such as a road or a garden is preferable. The terminal device 1 collects information in the house using a plurality of sensors, and transmits the collected information to the server 2. The server 2 detects a predetermined state based on the collected information.

The terminal device 1 includes a first storage unit 101, a first sensor 102, a second sensor 103, a first control unit 104, a first communication unit 105, and a power supply unit 106.

The first storage unit 101 is composed of, for example, a ROM (Read Only Memory), a RAM (Read Access Memory), or an HDD (Hard Disk Unit). The sensor information detected by the first sensor 102 and the second sensor 103 is temporarily stored in the first storage unit 101 of the present embodiment. The first storage unit 101 may store various programs for driving the first control unit 104. The first storage unit 101 may store identification numbers for identifying its own terminal device 1 from a plurality of terminal devices 1. The identification number may be, for example, an IP address. The first storage unit 101 may store the remaining battery level.

The first sensor 102 is a sensor that is used more frequently than the second sensor 103. It is preferable that the first sensor 102 is always activated. The first sensor 102 preferably consumes less power than the second sensor 103. Specific examples of the first sensor 102 include a motion sensor, a brightness sensor, a temperature sensor, and a pressure sensor. The first sensor 102 may be an odor sensor, a temperature / humidity sensor, or a distance sensor. As the motion sensor, for example, a pyroelectric infrared sensor can be used. The motion sensor is not only a passive sensor that detects people by receiving infrared rays emitted by an object, but also detects people by emitting infrared rays and detecting whether the projected infrared rays are blocked. An active sensor may be used. As the brightness sensor, an illuminance sensor can be used. As the illuminance sensor, for example, a digital illuminance sensor can be used. The illuminance sensor is preferably configured to include a photoelectric element. As the odor sensor, a hot wire type sintered semiconductor sensor and a substrate type semiconductor sensor can be used. Examples of the hot wire type sintered semiconductor sensor include a tin oxide hot wire type sintered semiconductor sensor. Examples of the substrate type semiconductor sensor include a zinc oxide-based substrate type semiconductor sensor and a tin oxide-based substrate type thick film semiconductor sensor. Since the odor sensor detects changes in the electrical conductivity of the metal oxide semiconductor adsorbed by the odor molecules, it is preferable that the heater activates the adsorption and desorption of the odor molecules to reduce the influence of environmental changes in temperature and humidity. The odor sensor may be a film type surface stress sensor. The film-type surface stress sensor can detect the stress generated by the adsorption of odor molecules on the sensitive film as a change in the electrical resistance of the semiconductor.

The second sensor 103 is a sensor that is used less frequently than the first sensor 102. The second sensor 103 is a sensor that is not activated in the initial state and is activated in a necessary situation. The second sensor may be in the standby mode in which the power saving standby state is set. Specifically, the second sensor 103 starts or stops based on the sensor control information from the server 2. Specifically, as the second sensor 103, a motion sensor, a distance sensor, an odor sensor, or a temperature / humidity sensor can be used. The second sensor 103 may be a pressure sensor, a temperature sensor, or an illuminance sensor.

In the case of the present embodiment, the first sensor 102 that is always activated is preferably a sensor that consumes less power than the second sensor 103. This is to realize power saving of the terminal device 1 as a whole. The second sensor information detected by the second sensor 103 is preferably information that makes it easier and more accurate to determine a predetermined state than the first detection information detected by the first sensor 102.

The state detection system 10 comprises, for example, a first sensor 102 composed of a brightness sensor for the purpose of preventing the dwelling from becoming a garbage mansion or detecting a state in which the target resident is not moving. The sensor 103 of 2 may be composed of an odor sensor. Hereinafter, the first sensor 102 is a brightness sensor, and the second sensor 103 is a specific example of an odor sensor, which is referred to as Example 1. In the state detection system 10 of the first embodiment, the brightness sensor only needs to be able to detect the brightness of the surroundings where the terminal device 1 is arranged. As the brightness sensor, an illuminance sensor equipped with an infrared cut filter can be used. As the illuminance sensor, the digital illuminance sensor IC is used in the first embodiment. The digital illuminance sensor IC can be driven, for example, with an operating voltage of 2.0 to 3.0 V and an operating current of 75 μA. The odor sensor may be any one capable of detecting putrefactive odors related to a specific component in the surroundings where the terminal device 1 is arranged. The odor sensor may detect hydrogen sulfide as a putrid odor, for example. The odor sensor includes a gas sensitive element. In the gas-sensitive element, a metal oxide semiconductor is formed on an alumina substrate together with an integrated heater. Since the odor sensor uses a heater, the power consumption is relatively large. Therefore, from the viewpoint of power saving, it is preferable to start the odor sensor in a necessary situation. The odor sensor can be driven by, for example, a heater voltage of 1.6 V and a heater current of 140 μA. Since the odor sensor operates the heater intermittently for sensing, for example, the power consumption can be driven at about 15 mW.

The first control unit 104 is composed of, for example, a CPU (Central Processing Unit). The first control unit 104 executes various programs and performs arithmetic processing. Specifically, the first control unit 104 of the present embodiment includes a sensor control function 107 and a communication control function 108.

The sensor control function 107 is a function that controls the start or stop of the second sensor 103 based on the sensor control information transmitted from the server 2.

The communication control function 108 has a function of transmitting the first sensor information detected by the first sensor 102 to the server 2 at predetermined time intervals via the first communication unit 105. The communication control function 108 has a function of transmitting the second sensor information detected by the second sensor 103 to the server 2 via the first communication unit 105.

The first communication unit 105 is configured so that it can communicate with the server 2. The first communication unit 105 of the present embodiment is configured so that the first sensor information and the second sensor information can be transmitted to the server 2 and the sensor control information can be received from the server 2.

The first communication unit 105 can use, for example, a communication module of a specific low power wireless device using LPWA (Low Power Wide Area) in order to suppress the power consumption of the terminal device 1. A communication module using LPWA can be driven with low power consumption, for example, although the number of communications and the amount of communications are limited. A communication module using LPWA can, for example, transmit up to 12 bytes of data at a time from the first communication unit 105 to the server 2 140 times a day. Further, the communication module using LPWA can receive, for example, from the server 2 four times a day. The communication module using LPWA can, for example, set the transmission power to 20 mW or less. By setting the communication module using LPWA, mutual communication between the terminal device 1 and the server 2 becomes possible. The server 2 is configured to be able to determine which of the plurality of terminal devices 1 the communication is from. The first communication unit 105 may reduce the amount of communication by compressing the data of the first sensor information and the second sensor information and transmitting the information.

The power supply unit 106 is preferably composed of a battery that supplies power to each unit of the terminal device 1. As the battery, a primary battery or a secondary battery can be used. The power supply unit 106 of the present embodiment constantly supplies power to the first storage unit 101, the first sensor 102, the first control unit 104, and the first communication unit 105, but the first The second sensor 103 is configured to be able to supply electric power when the second sensor 103 is activated. The power supply unit 106 can operate the terminal device 1 without requiring an external power supply.

FIG. 3 is a schematic configuration diagram of the server 2. The server 2 is a device that detects whether or not it is in a predetermined state based on the information transmitted from the terminal device 1.

The server 2 includes a second storage unit 201, a second control unit 202, and a second communication unit 203.

The second storage unit 201 is composed of, for example, a ROM (Read Only Memory), a RAM (Read Access Memory), or an HDD (Hard Disk Unit). The second storage unit 201 of the present embodiment includes a first determination table 204 and a second determination table 205. The first determination table 204 is an information table for determining whether or not it is in the first state. The first state includes, for example, a precursory state suspected of being a predetermined state. The first state is not limited to the precursory state that indicates a precursor of a predetermined state. The first state may be, for example, a state in which the probability of discriminating from a predetermined state is lower than a predetermined reference. The second determination table 205 is an information table for determining whether or not the state is in the second state when the first determination table 204 is used to determine the first state. The second state is a predetermined state. The second state may be, for example, a state in which the probability of discriminating from a predetermined state is higher than a predetermined reference. More specifically, the second state is, for example, an abnormal state as a predetermined state. For example, in the case of the first embodiment, the first determination table 204 stores the first threshold value regarding the amount of change in brightness detected by the brightness sensor, which is the first sensor 102. In the second determination table 205, a second threshold value regarding the odor corresponding to the putrid odor detected by the odor sensor, which is the second sensor 103, is stored. The second storage unit 201 may store a learning model that has been machine-learned in advance. The server 2 may input the detected first sensor information into the learning model and determine whether or not it is in a precursory state suspected of being in a predetermined state. Similarly, the server 2 may input the detected second sensor information into another learning model and determine whether or not it is in a predetermined state. The second storage unit 201 may store the identification table. The identification table corresponds to the identification number of each of the plurality of terminal devices 1 and the position information of each of the plurality of terminal devices 1.

The second storage unit 201 of the present embodiment stores information for determining a precursor state or a predetermined state, but it is not necessary to store the information in the second storage unit 201. For example, the information for determining the precursor state or the predetermined state may be incorporated as an algorithm of the program executed by the second control unit 202.

The second control unit 202 is composed of, for example, a CPU (Central Processing Unit). The second control unit 202 executes various programs and performs arithmetic processing. Specifically, the second control unit 202 of the present embodiment includes a precursor state determination function 206, a predetermined state determination function 207, a sensor control information creation function 208, a notification information creation function 209, and a communication control function 210. , Equipped with.

The precursor state determination function 206 is a function of determining whether or not the precursor state is in the precursor state based on the first sensor information received from the terminal device 1 and the first determination table 204. In the case of the first embodiment, the precursor state determination function 206 determines that the precursor state is in the precursor state when, for example, the amount of change in brightness in a predetermined fixed time is less than the first threshold value. When the value of the brightness sensor is within a predetermined range where the value of the brightness sensor is constant or does not change so much, the precursor state determination function 206 determines the precursor state.

The predetermined state determination function 207 is a function of determining whether or not the state is in a predetermined state based on the second sensor information received from the terminal device 1 and the second determination table 205. In the case of the first embodiment, the predetermined state determination function 207 is set to the predetermined state when, for example, the value related to the specific odor corresponding to the putrid odor detected by the odor sensor is larger than the second threshold value or the second threshold value. Judge that there is. That is, the predetermined state determination function 207 determines that the predetermined state is in the predetermined state when the value related to the specific putrid odor of the odor sensor is equal to or more than a predetermined threshold value.

The sensor control information creation function 208 has a function of creating sensor control information for activating the second sensor when the precursor state determination function 206 determines that the sensor control information creation function 208 is in the precursor state. Hereinafter, the sensor control information for activating the second sensor is referred to as sensor activation information. The sensor control information creation function 208 has a function of creating sensor control information for stopping the second sensor when the predetermined state determination function 207 determines that the state is not in the predetermined state. Hereinafter, the sensor control information for stopping the second sensor is referred to as sensor stop information.

The notification information creation function 209 is a function for creating notification information indicating that the state is in the predetermined state when the predetermined state determination function 207 determines that the state is in the predetermined state. The report information is transmitted to the report device 3.

The communication control function 210 is configured so that the first sensor information and the second sensor information can be received from the terminal device 1 via the second communication unit 203. The communication control function 210 is configured so that the sensor start information and the sensor stop information created by the sensor control information creation function 208 can be transmitted to the terminal device 1. The communication control function 210 is configured so that the notification information created by the notification information creation function 209 can be transmitted to the notification device 3 via the second communication unit 203.

The second communication unit 203 is configured to be able to communicate with the terminal device 1 and the notification device 3 via the communication network 4. The second communication unit 203 is not limited to the case of communicating with the terminal device 1 and the reporting device 3 through a public line, and may be configured to be able to communicate with a dedicated line.

The reporting device 3 is a device that receives notification information indicating that the server 2 is in a predetermined state. For example, when the reporting device 3 detects a state in which the target person is not moving, or when detecting an illegal invasion, the reporting device 3 manages the target person's family, a security company with which a contract has been signed, or a contractor. It becomes an information processing terminal owned by. As the information processing terminal, a mobile phone, a smartphone, a tablet, a personal computer, or the like is assumed. The reporting device 3 reports an alarm when, for example, a third communication unit that communicates with the server 2 via the communication network 4 and a specific terminal device 1 are in a predetermined state from the third communication unit. It suffices to have a reporting unit to report.

The communication network 4 includes, for example, a public line network, an Internet network, or a WiFi (registered trademark) network. The communication between the terminal device 1 and the server 2 in the present embodiment is realized by using a communication service in which the communication capacity, the communication speed, and the number of times of communication are limited. The communication between the terminal device 1 and the server 2 is limited, for example, the data capacity that can be communicated in one communication, the uplink and downlink communication speeds, and the number of uplink and downlink communications per day. If the communication from the terminal device 1 to the server 2 is defined as the uplink communication and the communication from the server 2 to the terminal device 1 is defined as the downlink communication, the communication service used in the present embodiment is defined as the number of uplink communications> the downlink communication. It is the number of times. Communication between the terminal device 1 and the server 2 is a communication service suitable for a configuration in which the sensor information acquired by the terminal device 1 is periodically transmitted to the server 2.

The terminal device 1, the server 2, and the reporting device 3 are composed of a central processing unit having a calculation function and a control function, and an electronic device having a main storage device having a function of storing programs and data. The terminal device 1, the server 2, and the reporting device 3 may include an auxiliary storage device such as a hard disk in addition to the main storage device.

The program executed by the terminal device 1, the server 2, and the reporting device 3 is, for example, a ROM (Read Only Memory), a RAM (Read Access Memory), or an HDD (Hard Disk Unit) of the terminal device 1, the server 2, and the reporting device 3. ), But also may be recorded on a computer-readable recording medium. Examples of computer-readable recording media include hard disks, flexible disks, CD-ROMs (Compact Disc Read Only Memory), MO (Magneto Optical Disk) disks, and DVD-ROMs (Digital Versatile Disc Read Only Memory). The programs executed by the terminal device 1 and the server 2 may be distributed via the communication network.

The server 2 may be composed of a system in which a plurality of server devices are connected to a network in addition to a server device physically composed of one.

Next, the operation of the state detection system 10 of the present embodiment will be described with reference to FIGS. 4 and 5. 4 and 5 are flowcharts showing the operations of the terminal device 1 and the server 2 constituting the state detection system 10. In the following, the steps of the flowchart are indicated by S.

First, when the power of the terminal device 1 is turned on, the first sensor 102 is activated (S10). The first sensor 102 starts collecting the sensed first sensor information (S20).

Next, the terminal device 1 transmits the first sensor information collected by the first sensor 102 to the server 2 at predetermined time intervals (S30: YES) (S40).

When the server 2 receives the first sensor information (S50), whether or not the surrounding state in which the terminal device 1 is arranged is in the precursor state based on the first sensor information and the first determination table 204. Is determined (S60). For example, in the case of the first embodiment, when the change in the value of the brightness sensor in the latest predetermined fixed time is less than the first threshold value, the server 2 changes the surrounding state in which the terminal device 1 is arranged. Judge that it is in a precursory state.

When it is determined that the surrounding state in which the terminal device 1 is arranged is in the precursor state (S70: YES), the server 2 creates the sensor activation information for activating the second sensor (S80). The server 2 transmits the created sensor activation information to the terminal device 1 (S90). When the server 2 determines that the surrounding state in which the terminal device 1 is arranged is not in the precursor state (S70: NO), the server 2 performs a process of returning to S30.

Next, when the terminal device 1 receives the sensor activation information (S100), the terminal device 1 activates the second sensor 103 (S110). The terminal device 1 starts collecting the second sensor information with the activation of the second sensor 103 (S120). The terminal device 1 transmits the second sensor information collected by the second sensor 103 to the server 2 (S130).

When the server 2 receives the second sensor information (S140), whether or not the surrounding state in which the terminal device 1 is arranged is in a predetermined state based on the second sensor information and the second determination table 205. (S150). For example, in the case of the first embodiment, when the value related to the odor corresponding to the putrid odor detected by the odor sensor is equal to or higher than the second threshold value, the server 2 has a predetermined surrounding state in which the terminal device 1 is arranged. Determined to be in a state.

When the surrounding state in which the terminal device 1 is arranged is in a predetermined state (S160: YES), the server 2 creates notification information indicating that the terminal device 1 is in a predetermined state (S170). When the server 2 creates the report information, the server 2 transmits the created report information to the report device 3 (S180). The reporting organization can recognize from the reporting device 3 that the target person or house is in a predetermined state. When the server 2 determines that the surrounding state in which the terminal device 1 is arranged is not in a predetermined state (S160: NO), the server 2 creates sensor stop information (S190).

When the server 2 creates the sensor stop information (S190), the server 2 transmits the created sensor stop information to the terminal device 1 (S200).

Next, when the terminal device 1 receives the sensor stop information (S210), the terminal device 1 stops the second sensor 103 (S220). The terminal device 1 performs a process of stopping the second sensor 103 and then a process of returning to S30.

The state detection system 10 of the present embodiment transmits the first sensor information detected by the first sensor 102 of the terminal device 1 to the server 2, and the server 2 is in a predetermined state based on the first sensor information. Detect a threatening precursor state. When the server 2 detects the precursor state, the server 2 transmits the sensor activation information for activating the second sensor 103 to the terminal device 1. As a result, the terminal device 1 activates the second sensor 103 only in the precursory state, and transmits the second sensor information detected by the second sensor 103 to the server 2. Then, when the server 2 detects a predetermined state based on the second sensor information, the server 2 transmits the notification information indicating the predetermined state to the reporting organization. On the other hand, when the server 2 does not detect a predetermined state based on the second sensor information, the server 2 transmits the sensor stop information for stopping the second sensor 103 to the terminal device 1.

From the above, according to the state detection system 10 of the present embodiment, it is possible to detect a predetermined state with a simpler configuration and more power saving. In particular, in the case of the first embodiment, it is possible to detect the target abnormal state at an early stage while realizing power saving. Since the power supply unit 106 of the terminal device 1 is composed of a battery that does not require an external power source, the function of the terminal device 1 can be stably exhibited.

The server 2 of the present embodiment determines a predetermined state based on the second sensor information (S150), but may determine the predetermined state by adding the first sensor information. That is, the server 2 may determine whether or not it is in a predetermined state by using the first sensor information and the second sensor information.

The terminal device 1 of the present embodiment includes two sensors, a first sensor 102 and a second sensor 103. The terminal device 1 has adopted a configuration in which the sensors are switched when the switching conditions of the two sensors are satisfied. FIG. 6A is a diagram showing a sensor switching pattern when two sensors are used. In the state detection system 10 of the present embodiment, the sensor switching pattern 2 shown in FIG. 6A is adopted, the first sensor is used in the first stage, and the first sensor 102 and the second sensor 103 are used in the second stage. Using. However, the state detection system 10 may adopt the sensor switching pattern 1 shown in FIG. 6A, use the first sensor 102 in the first stage, and use the second sensor 103 in the second stage. When the state detection system 10 uses the first sensor 102 in the first stage and the second sensor 103 in the second stage, the power saving of the terminal device 1 can be realized.

The terminal device 1 is not limited to a structure in which the first sensor 102 is composed of a brightness sensor and the second sensor 103 is composed of an odor sensor. In the terminal device 1, for example, the first sensor 102 may be composed of a motion sensor or a microphone, and the second sensor 103 may be composed of an odor sensor. The motion sensor may be any sensor that senses people around the terminal device 1. Examples of the motion sensor include a pyroelectric infrared sensor. The pyroelectric infrared sensor is driven by, for example, an operating voltage of 2.0 to 4.0 V and a current consumption of 6.0 μA. The microphone may be any as long as it can detect the surrounding sound in which the terminal device 1 is arranged. The terminal device 1 determines that the human sensor does not detect a person in a predetermined fixed time in a structure in which the first sensor 102 is a motion sensor or a microphone and the second sensor 103 is an odor sensor. Or, when it is determined that the volume of the sound collected by the microphone is equal to or lower than the predetermined volume level within a predetermined fixed time, the odor sensor is activated.

The state detection system 10 according to the present embodiment may have a configuration in which the terminal device 1 includes three sensors. When the terminal device 1 includes three sensors, it can determine a predetermined state more accurately. FIG. 6B is a diagram showing an example of a switching pattern when three sensors are used.

For example, the state detection system 10 adopts the sensor switching pattern 1 shown in FIG. 6B, uses the first sensor 102 in the first stage, uses the second sensor 103 in the second stage, and uses the third sensor 103 in the third stage. Sensor 109 may be used. That is, the state detection system 10 may sequentially switch to a different sensor each time the sensor switching condition is satisfied.

The state detection system 10 adopts, for example, the sensor switching pattern 2 shown in FIG. 6B, the first sensor 102 is used in the first stage, and the first sensor 102 and the second sensor 103 are used in the second stage. In the third stage, the first sensor 102, the second sensor 103, and the third sensor 109 may be used. That is, the state detection system 10 may add a new sensor each time the sensor switching condition is satisfied.

When the state detection system 10 detects illegal intrusion, for example, the terminal device 1 uses a motion sensor as the first sensor 102, a brightness sensor as the second sensor 103, and a third sensor 109. A microphone may be used. Hereinafter, a specific example in which a motion sensor is used as the first sensor 102, a brightness sensor is used as the second sensor 103, and a microphone is used as the third sensor 109 will be referred to as Example 2. In the state detection system 10 of the second embodiment, the motion sensor is the only sensor that is activated in the initial state.

In the state detection system 10 of the second embodiment, the terminal device 1 transmits the sensor information detected by the motion sensor in the first stage to the server 2 at predetermined time intervals. When the server 2 determines that the person is not detected within a predetermined fixed time based on the sensor information from the motion sensor, the server 2 transmits a sensor activation signal for activating the brightness sensor to the terminal device 1. Next, the terminal device 1 activates the brightness sensor based on the sensor activation signal, and transmits the sensor information detected by the brightness sensor in the second stage to the server 2. The server 2 transmits a sensor activation signal for activating the microphone to the terminal device 1 when the amount of change in brightness is less than a predetermined threshold value in a predetermined fixed time based on the sensor information from the brightness sensor. Next, the terminal device 1 activates the microphone based on the sensor activation signal, and transmits the sensor information detected by the microphone in the third stage to the server 2. The server 2 determines a predetermined state based on the brightness sensor and the sensor information of the microphone transmitted from the terminal device 1. For example, the server 2 determines that the state is in a predetermined state when the amount of change in brightness continues to be less than a predetermined threshold value and the loudness of the sound collected by the microphone is equal to or higher than a predetermined volume. You may.

Further, as a modification of the state detection system 10 of the second embodiment, for example, the sensor switching pattern 3 shown in FIG. 6B is adopted, the first sensor is used in the first stage, and the second sensor is used in the second stage. The second sensor and the third sensor may be used in the third stage. That is, each time the sensor switching condition is satisfied, the sensor may be switched to a different sensor, or a new sensor may be added.

The state detection system 10 uses, for example, a motion sensor as the first sensor 102, a brightness sensor as the second sensor 103, and a third sensor for the purpose of watching over a person in a house. An odor sensor may be used as the sensor 109. Hereinafter, a motion sensor will be used as the first sensor 102, a brightness sensor will be used as the second sensor 103, and an odor sensor will be used as the third sensor 109, and specific examples will be referred to as Example 3. The motion sensor is the only sensor that is activated in the initial state of the third embodiment.

In the state detection system 10 of the third embodiment, the terminal device 1 transmits the sensor information detected by the motion sensor in the first stage to the server 2 at predetermined time intervals. When the server 2 determines that the person is not detected in a predetermined fixed time based on the sensor information from the motion sensor, the server 2 transmits a sensor switching signal for switching the motion sensor to the brightness sensor to the terminal device 1. Next, the terminal device 1 activates the brightness sensor based on the sensor switching signal, stops the brightness sensor, and transmits the sensor information detected by the brightness sensor in the second stage to the server 2. The server 2 transmits a sensor activation signal for activating the odor sensor to the terminal device 1 when the amount of change in brightness is less than a predetermined threshold value in a predetermined fixed time based on the sensor information from the brightness sensor. Hereinafter, since the state detection system 10 of the third embodiment is the same as that of the first embodiment, the description thereof will be omitted.

The state detection system 10 may be capable of detecting a predetermined state with a simpler configuration and more power saving by using three sensors. In particular, the state detection system 10 of the second embodiment can detect an unauthorized intrusion state of the target house more reliably and early. The state detection system 1 of the third embodiment can detect an abnormal state more reliably and early.

In any switching pattern, the state detection system 10 preferably uses a first sensor in the initial state as a sensor that consumes less power than the second sensor and the third sensor used in the later state.

The predetermined state of the present embodiment means an abnormal state that has occurred inside the house. The abnormal state may be an abnormal state such as a dead state of a pet kept in the house or a water leak in the house. For example, when detecting the dead state of a pet kept in a house, the detection method of Example 1 in which the first sensor 102 is a brightness sensor and the second sensor 103 is an odor sensor may be applied. For example, when detecting an abnormal state such as water leakage in a house, a microphone or a humidity sensor may be used as the first sensor 102 or the first sensor 103.

Each process of the embodiment, or each of the functions, may be realized by centralized processing by a single device or a single system, or may be distributed processing by a plurality of devices or a plurality of systems. It may be realized. In addition, each component of the embodiment may be configured by dedicated hardware. Each component of the embodiment may be realized by executing a program for a component that can be realized by software.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and variations to the embodiments of the present invention can be made without departing from the gist of the present invention. Modifications can be made, and configurations with such modifications and modifications are also included within the technical scope of the invention.

1 Terminal device 2 Server 3 Notification device 4 Communication network 10 Status detection system 101 First storage unit 102 First sensor 103 Second sensor 104 First control unit 105 First communication unit 106 Power supply unit 107 Sensor control Function 108 Communication control function 109 Third sensor 201 Second storage unit 202 Second control unit 203 Second communication unit 204 First judgment table 205 Second judgment table 206 Precursor state judgment function 207 Predetermined state judgment function 208 Sensor control information creation function 209 Notification information creation function 210 Communication control function

Claims (7)

A state detection system including a terminal device and a server capable of communicating with the terminal device.
The terminal device is
The first sensor that outputs the sensed first sensor information and
A second sensor that outputs the sensed second sensor information, and
A first control unit that controls the activation of the second sensor, and
A first communication unit that transmits the first sensor information detected by the first sensor to the server, and
With
The server
A second communication unit capable of communicating with the terminal device,
Based on the first sensor information received by the second communication unit, a determination unit that determines whether or not it is in the first state, and a determination unit.
An information creation unit that creates activation information for activating the second sensor based on the determination result of the first state.
With
The second communication unit transmits the activation information to the terminal device, and the second communication unit transmits the activation information to the terminal device.
The first control unit activates the second sensor based on the activation information received by the first communication unit.
The first communication unit transmits the second sensor information detected by the second sensor to the server, and the first communication unit transmits the second sensor information detected by the second sensor to the server.
The determination unit is a state detection system that determines whether or not the state is a predetermined state based on the second sensor information received by the second communication unit. When the determination unit determines that the predetermined state is not obtained, the information creation unit creates stop information for stopping the second sensor.
The second communication unit transmits the stop information created by the information creation unit to the terminal device.
The state detection system according to claim 1, wherein the first control unit stops the second sensor based on the stop information received by the first communication unit. The state detection system according to claim 1 or 2, wherein the first sensor consumes less power than the second sensor. In the first communication unit, the number of communications for transmitting information to the second communication unit within a predetermined time is equal to the number of communications for which the second communication unit transmits information to the first communication unit. The state detection system according to any one of claims 1 to 3, which is often used. In the first communication unit, the amount of communication for transmitting information to the second communication unit within a predetermined time is greater than the amount of communication for which the second communication unit transmits information to the first communication unit. The state detection system according to any one of claims 1 to 4, which is often used. The state detection system according to any one of claims 1 to 5, wherein the terminal device is battery-powered. The first sensor is either a brightness sensor, a motion sensor, or a microphone.
The state detection system according to any one of claims 1 to 6, wherein the second sensor is an odor sensor.

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