Sensor Device

Abstract

To provide a sensor device that can accurately determine whether there is a person in a room space.SOLUTION: A sensor device 1 includes: a plurality of sensors (sensor units 20) that can detect a room space 2 of a building (a house); and a control unit 50 for executing processing related to the sensors (the sensor units 20). The sensors (the sensors 20) include: a human sensor 21 for detecting a human; and a sound pressure sensor 22 for detecting sound. The control unit 50 can determine whether there is a person in the room space 2 equipped with the sensor device 1, by using the result of detection by the human sensor 21 and the result of detection by the voice pressure sensor 22.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a technology for a sensor device that detects the internal environment of an indoor space of a building. [Background technology]

[0002] Conventionally, technology for a sensor device that detects the internal environment of an indoor space of a building has been publicly known, as described in Patent Document 1, for example.

[0003] Patent Document 1 describes a sensor mechanism that is installed in a house and has a plurality of sensors including a human sensor that can detect people. Based on the detection result of the human sensor, it is possible to determine whether or not a person is present in the indoor space.

[0004] Here, the human presence sensor may have difficulty detecting a person when the person is outside a predetermined detection range or when the person is blocked by a wall, an object, etc. In this case, it may be difficult to accurately determine whether or not a person is present in the indoor space. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-31286 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and the problem it aims to solve is to provide a sensor device that can accurately determine whether or not a person is present in an indoor space. [Means for solving the problem]

[0007] The problem to be solved by the present invention has been described above, and the means for solving this problem will now be described.

[0008] That is, in claim 1, there is provided a sensor device including a plurality of sensors capable of detecting an internal environment of an indoor space of a building, and a control unit capable of executing processing related to the plurality of sensors, the plurality of sensors including at least a human presence sensor capable of detecting a person and a sound pressure sensor capable of detecting sound, the control unit is capable of determining whether or not a person is present in the indoor space in which the sensor device is installed, using a detection result of the human presence sensor and a detection result of the sound pressure sensor, and is capable of executing a normal mode in which a detection result of at least one of the plurality of sensors is obtained at a first interval, and a power saving mode in which a detection result of the sensor is obtained at a second interval longer than the first interval, the control unit executes the normal mode when it is determined that a person is present in the indoor space, and executes the power saving mode when it is determined that a person is not present in the indoor space, and starts execution of the normal mode when a first detection result by the human presence sensor that a person has been detected is obtained, and when the normal mode is being executed, a detection result by the sound pressure sensor that the loudness of the sound is equal to or greater than a predetermined threshold is detected, The When the second detection result is obtained, the normal mode is continued, whereas when the second detection result is not obtained, the normal mode is ended and execution of the power saving mode is started.

[0011] Claim 2 In the method, the control unit determines whether or not the second detection result has been obtained based on whether or not the second detection result has been obtained within a specified period from the time when the first detection result was obtained or from the time when the second detection result was last obtained.

[0012] Claim 3 The present invention provides a housing that houses the plurality of sensors, the plurality of sensors including a temperature sensor capable of detecting temperature. Effect of the Invention

[0013] The present invention has the following advantages.

[0014] According to claim 1, it is possible to accurately determine whether or not a person is present in the indoor space. Also, appropriate control can be performed depending on whether or not there is a person in the indoor space.

[0017] Claim 2 In this case, it is possible to more accurately determine whether or not a person is present in the indoor space.

[0018] Claim 3 In this case, the temperature of the indoor space can be detected suitably. [Brief description of the drawings]

[0019] [Figure 1] 1 is a block diagram showing a sensor device according to an embodiment of the present invention; [Diagram 2] FIG. 4 is a perspective view showing a state in which the sensor device is installed. [Diagram 3] FIG. 2 is a plan view showing a house in which a sensor device is installed. [Figure 4] 11 is a flowchart showing a first mode execution process. [Diagram 5] 10 is a flowchart showing a second mode execution process. [Figure 6] 10 is a flowchart showing a modified example of the second mode execution process. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] A sensor device 1 according to an embodiment of the present invention will be described below with reference to Fig. 1 to Fig. 6. In the following description, the front-rear direction, left-right direction, and up-down direction will be defined based on the arrows in the drawings.

[0021] The sensor device 1 shown in Figures 1 to 3 is capable of detecting the internal environment of a house. The sensor device 1 is installed inside the house (indoor space 2). First, an example of a house in which the sensor device 1 is installed will be described below with reference to Figure 3.

[0022] The house has an indoor space 2 whose internal environment is detected by a sensor device 1. The indoor space 2 is a space partitioned by walls 3 of the house. The walls 3 are provided with entrances 3a through which people can enter and exit the indoor space 2. In this embodiment, the house has multiple indoor spaces 2 (three in the illustrated example). More specifically, the house has indoor spaces 2 located at the southwest corner, the northeast corner, and the southeast corner.

[0023] Next, the sensor device 1 will be described. The sensor devices 1 shown in Fig. 1 to Fig. 3 are installed in each of the three indoor spaces 2 described above. As shown in Fig. 2 and Fig. 3, the sensor device 1 is installed on the wall 3 of the indoor space 2. In this embodiment, the sensor device 1 is installed on the wall 3 in which the entrance / exit 3a is formed. Note that, hereinafter, the configuration of the sensor device 1 will be described mainly using the sensor device 1 installed on the west-facing surface of the wall 3 of the southwest indoor space 2 shown in Fig. 3 (hereinafter referred to as "southwest indoor space 2A" as necessary). Also, the front, rear, left, and right in Fig. 2 correspond to the west, east, south, and north in Fig. 3, respectively.

[0024] The sensor device 1 operates with power supplied from a predetermined power supply source. For example, a power system K shown in Fig. 1 can be used as the power supply source. In this case, a mode can be used in which the power supplied from the power system K is supplied to the sensor device 1 via an appropriate power supply unit (not shown) including an AC / DC power supply that converts AC to DC, a DC / DC power supply that appropriately changes the voltage of the DC power, or the like. In addition, the power supply source is not limited to the above-mentioned example, and for example, an internal power supply (not shown) built into the sensor device 1 can be used.

[0025] The sensor device 1 includes a housing 10, a sensor unit 20, a communication unit 30, a storage unit 40, and a control unit 50.

[0026] The housing 10 shown in Fig. 2 is a part that forms the outer periphery of the sensor device 1. The housing 10 incorporates (contains) a sensor unit 20, a communication unit 30, a storage unit 40, and a control unit 50, which will be described later. The housing 10 is formed in a substantially rectangular shape when viewed from the front. The housing 10 is formed in a thin box shape with its thickness direction facing the front-rear direction (thickness direction of the wall 3). The housing 10 has an installation surface 11, a measurement surface 12, and an air vent 13.

[0027] The installation surface 11 is a portion (the surface facing backward in FIG. 2) that is attached to the installation target (wall 3). In this embodiment, the installation surface 11 is attached to an outlet box that is provided on the wall 3 and that houses a predetermined outlet (a socket from which electric power can be taken out). The installation surface 11 can be provided with an appropriate engagement portion that can engage with the outlet box.

[0028] The measurement surface 12 is a surface that faces a direction in which some sensors (such as an illuminance sensor 25 and a human presence sensor 21 described later) of a sensor unit 20 described later measure (detect) when the sensor device 1 is attached to an installation target.

[0029] The ventilation holes 13 are openings that communicate between the outside and the inside of the housing 10. The ventilation holes 13 are provided on the bottom surface and both left and right side surfaces of the housing 10.

[0030] The sensor unit 20 shown in Fig. 1 constitutes a composite sensor consisting of a plurality of sensors capable of detecting the internal environment of a house. The sensor unit 20 operates using electric power. The sensor unit 20 includes a human presence sensor 21, a sound pressure sensor 22, an acceleration sensor 23, a temperature and humidity sensor 24, an illuminance sensor 25, and an air pressure sensor 26.

[0031] The human presence sensor 21 is a sensor capable of detecting a person within a predetermined detection range. The human presence sensor 21 detects the presence or absence of a person based on a change in infrared light received by an appropriate light receiving unit located on the measurement surface 12 side of the housing 10. The part hatched with two-dot chain lines in FIG. 3 is a schematic representation of the detection range of the human presence sensor 21. As shown in FIG. 3, the detection range of the human presence sensor 21 is smaller than the area of ​​the indoor space 2. The human presence sensor 21 is not limited to one that detects a person using infrared rays. For example, one that detects a person using ultrasonic waves or visible light can be used.

[0032] The human sensor 21 (sensor device 1) is disposed so as to detect a person who enters the indoor space 2 from the entrance 3a. That is, as shown in FIG. 3, the area of ​​the indoor space 2 on the wall 3 side where the sensor device 1 is installed and the entrance 3a is formed (the east side area in the southwest indoor space 2A) is within the detection range of the human sensor 21. The detection range is located over the entire width direction of the indoor space 2 (the north-south direction in the southwest indoor space 2A) in the area on the wall 3 side (the east side area in the southwest indoor space 2A). Therefore, a person who enters the indoor space 2 from the entrance 3a will be within the detection range. On the other hand, the detection range of the human sensor 21 does not reach the area of ​​the indoor space 2 on the opposite side of the wall 3 where the sensor device 1 is installed (the west side area in the southwest indoor space 2A), and the area is outside the detection range of the human sensor 21.

[0033] The sound pressure sensor 22 is a sensor capable of detecting the loudness (dB) of a sound. The sound pressure sensor 22 is provided to detect a sound generated within the indoor space 2 in which the sensor device 1 is installed.

[0034] The acceleration sensor 23 is a sensor capable of detecting acceleration. The acceleration sensor 23 can detect gravitational acceleration. The acceleration sensor 23 can also detect acceleration caused by shaking when an earthquake occurs.

[0035] The temperature and humidity sensor 24 is a sensor capable of detecting temperature and humidity.

[0036] The illuminance sensor 25 is a sensor capable of detecting illuminance. The illuminance sensor 25 detects the illuminance of light incident on the measurement surface 12 of the housing 10.

[0037] The air pressure sensor 26 is a sensor capable of detecting air pressure.

[0038] The communication unit 30 is capable of communicating with devices external to the sensor device 1. The communication unit 30 operates using power. The communication unit 30 is capable of transmitting the detection results of the sensor unit 20, etc. The communication unit 30 is also capable of receiving information from external devices.

[0039] The storage unit 40 stores various information. The storage unit 40 operates using electric power. The storage unit 40 can store the detection results of the sensor unit 20.

[0040] The control unit 50 is capable of executing processes related to the sensor device 1. The control unit 50 operates using electric power. The control unit 50 has a predetermined arithmetic processing device. The control unit 50 can execute processes related to the sensor device 1 by reading and processing programs and various information with the arithmetic processing device. The control unit 50 can also execute a process of measuring a period of time that has elapsed from a certain point in time (an elapsed period T, described later).

[0041] The control unit 50 is connected to the sensor unit 20, the communication unit 30, and the storage unit 40 so as to be able to communicate information with them. The control unit 50 can execute control for exchanging information between the sensor unit 20, the communication unit 30, and the storage unit 40. More specifically, the control unit 50 can execute control for transmitting the detection result acquired from the sensor unit 20 via the communication unit 30 and storing it in the storage unit 40. In this embodiment, the control unit 50 stores the detection result acquired from the sensor unit 20 in the storage unit 40 and transmits it via the communication unit 30.

[0042] In addition, the control unit 50 can execute a normal mode and a power saving mode based on the detection results of the human presence sensor 21 and the sound pressure sensor 22 described above.

[0043] The normal mode is a mode that is executed when the control unit 50 determines that a person is present in the indoor space 2. When the normal mode is executed, the control unit 50 detects the internal environment of the house using each sensor of the sensor unit 20 at a first interval that is a relatively short interval. In this embodiment, the first interval is set to one second. Note that the first interval is not limited to one second, and any appropriate interval can be adopted from the viewpoint of suitably detecting the internal environment of the indoor space 2. Also, the first interval can be set for each sensor of the sensor unit 20.

[0044] The power saving mode is a mode that is executed when the control unit 50 determines that no one is present in the indoor space 2. When the power saving mode is executed, the control unit 50 detects the internal environment of the house using each sensor of the sensor unit 20 at a second interval that is a relatively long interval (longer than the interval in the normal mode). In this embodiment, the second interval is set to 600 seconds (10 minutes). This makes it possible to reduce power consumption related to obtaining the detection results. Note that the second interval is not limited to 600 seconds, and any appropriate interval can be adopted from the perspective of reducing power consumption, etc. Also, the second interval can be set for each sensor of the sensor unit 20.

[0045] The control unit 50 can execute a first mode execution process (see FIG. 4) that can execute the normal mode based on the detection result of the human presence sensor 21. The control unit 50 can also execute a second mode execution process (see FIG. 5) that can switch between the normal mode and the power saving mode based on the detection results of the human presence sensor 21 and the sound pressure sensor 22.

[0046] In the following, the first mode execution process will be described first with reference to the flowchart of Fig. 4. The first mode execution process is repeatedly executed at a predetermined interval by the control unit 50. The interval at which the first mode execution process is executed can be set to an appropriate interval (e.g., one second interval to one minute interval, etc.) from the viewpoint of suitably executing the mode using the human presence sensor 21.

[0047] In step S10, the control unit 50 judges whether or not the control unit 50 has acquired a detection result that the human sensor 21 has detected a person. If the control unit 50 judges that the control unit 50 has acquired a detection result that the human sensor 21 has detected a person, the control unit 50 proceeds to processing in step S11. On the other hand, if the control unit 50 judges that the control unit 50 has not acquired a detection result that the human sensor 21 has detected a person, the control unit 50 ends the first mode execution processing.

[0048] In step S11, the control unit 50 sets the human detection flag to the ON state. Here, "setting the human detection flag to the ON state" refers to the detection of a human by the human presence sensor 21 or the sound pressure sensor 22. Specifically, this refers to the human presence sensor 21 detecting a human in step S10, or the detection result of the sound pressure sensor 22 being 50 dB or higher in step S24 described below. When the human detection flag is set to the ON state, the condition used for the judgment in the second mode execution process (step S20) described below is satisfied.

[0049] Furthermore, in step S11, the control unit 50 sets the elapsed period T to 0 seconds. Here, the elapsed period T refers to the period (seconds) that has elapsed since the control unit 50 obtained the detection result that the human presence sensor 21 detected a person in step S10, or since the control unit 50 determined in step S24 described later that the detection result of the sound pressure sensor 22 is 50 dB or higher.

[0050] Furthermore, in step S11, the control unit 50 executes the normal mode. After executing the process of step S11, the control unit 50 ends the first mode execution process.

[0051] As in the above-described process, when the control unit 50 acquires a detection result that the human presence sensor 21 has detected a human, the control unit 50 determines that a human is present in the indoor space 2, and executes the normal mode.

[0052] Next, the second mode execution process will be described with reference to the flowchart of Fig. 5. The second mode execution process is repeatedly executed at a predetermined interval by the control unit 50. The interval at which the second mode execution process is executed can be set to an appropriate interval (for example, one second interval to one minute interval, etc.) from the viewpoint of switching between modes using the human presence sensor 21 and the sound pressure sensor 22.

[0053] In step S20, the control unit 50 determines whether the human detection flag is on. If the control unit 50 determines that the human detection flag is on, the control unit 50 proceeds to step S21. On the other hand, if the control unit 50 determines that the human detection flag is not on (off), the control unit 50 ends the second mode execution process.

[0054] In step S21, the control unit 50 judges whether the elapsed period T is equal to or longer than a predetermined period. In this embodiment, the predetermined period is set to 300 seconds. Note that the predetermined period is not limited to 300 seconds, and various periods can be adopted from the viewpoint of suitably switching between the normal mode and the power saving mode. If the control unit 50 judges that the elapsed period T is equal to or longer than 300 seconds, the control unit 50 proceeds to processing of step S22. On the other hand, if the control unit 50 judges that the elapsed period T is shorter than 300 seconds, the control unit 50 proceeds to processing of step S24.

[0055] In step S22, the control unit 50 turns off the human detection flag. Also, in step S22, the control unit 50 sets (resets) the elapsed period T to 0 seconds. After executing the process of step S22, the control unit 50 executes the process of step S23.

[0056] In step S23, the control unit 50 executes the power saving mode. After executing the process of step S23, the control unit 50 ends the second mode execution process.

[0057] In step S24 following the process of step S21 (step S21: NO), the control unit 50 determines whether or not the detection result of the sound pressure sensor 22 acquired by the control unit 50 is equal to or greater than a predetermined threshold. In this embodiment, when the detection result of the sound pressure sensor 22 is equal to or greater than the threshold, it is deemed that the sound pressure sensor 22 has detected a person.

[0058] The threshold value is set as a value capable of detecting the daily sounds of a person (resident) in the indoor space 2 in which the sensor device 1 is installed. In this specification, daily sounds refer to sounds that are generated when a person is present in the indoor space 2, such as footsteps, voices, sounds made when moving an object, sounds from a television, and sounds made when an air conditioner is operating. The threshold value is set so as to be able to exclude sounds that are generated even when no person is present in the indoor space 2 in which the sensor device 1 is installed, such as sounds heard from outside the indoor space 2.

[0059] In this embodiment, the threshold is set to 50 dB. Note that the threshold is not limited to 50 dB, and various values ​​can be set from the viewpoint of detecting living sounds (sounds generated by people being present) in the indoor space 2. When the control unit 50 determines that the detection result of the sound pressure sensor 22 is 50 dB or more, the control unit 50 proceeds to the process of step S25. On the other hand, when the control unit 50 determines that the detection result of the sound pressure sensor 22 is less than 50 dB, the control unit 50 ends the second mode execution process.

[0060] In step S25, the control unit 50 sets the human detection flag to an ON state. Also in step S25, the control unit 50 sets (resets) the elapsed period T to 0 seconds. Also in step S25, the control unit 50 executes the normal mode. After executing the process of step S25, the control unit 50 ends the second mode execution process.

[0061] By executing the first mode execution process and the second mode execution process as described above, it is possible to switch between modes using the detection results of the human presence sensor 21 and the sound pressure sensor 22. That is, when the control unit 50 acquires a detection result that the human presence sensor 21 has detected a person (step S10: YES, step S11), or when the control unit 50 judges that the detection result of the sound pressure sensor 22 is 50 dB or more (step S24: YES, step S25) (i.e., from when the human detection flag was last turned on), if the control unit 50 acquires a detection result of 50 dB or more by the sound pressure sensor 22 (step S24: YES) before the elapsed period T becomes 300 seconds or more (step S21: NO), the control unit 50 judges that a person is present in the indoor space 2 and executes the normal mode (step S25).

[0062] On the other hand, if the sound pressure sensor 22 has not obtained a detection result of 50 dB or more (step S24: NO) since the last time the human detection flag was turned on (step S10: YES, step S11, or step S24: YES, step S25) and the elapsed period T is 300 seconds or more (step S21: YES), the control unit 50 determines that there is no person in the indoor space 2 and executes the power saving mode (step S23).

[0063] According to the sensor device 1 as described above, it is possible to switch between appropriate modes depending on whether or not a person is present in the indoor space 2 in which the sensor device 1 is installed. That is, when the control unit 50 determines that a person is present in the indoor space 2, the normal mode is executed, and the detection results of each sensor of the sensor unit 20 are obtained at relatively short intervals, so that the internal environment of the indoor space 2 can be measured. On the other hand, when the control unit 50 determines that no person is present in the indoor space 2, the power saving mode is executed, and the detection results of each sensor of the sensor unit 20 are obtained at relatively long intervals, so that the power consumption related to the acquisition of the detection results can be reduced.

[0064] Furthermore, heat is generated from devices inside the housing 10 (for example, the communication unit 30, the internal power supply, etc.) as the detection results of each sensor of the sensor unit 20 are obtained. When the power saving mode is executed, the detection results of each sensor of the sensor unit 20 are obtained at relatively long intervals, so that the heat generated as the detection results are obtained can be suppressed. This makes it possible to suppress the heat from being trapped inside the housing 10 and affecting the detection results of each sensor of the sensor unit 20 housed in the housing 10 when there is no one in the indoor space 2. In particular, it is possible to suppress the heat from affecting the temperature detection using the temperature and humidity sensor 24, and the temperature of the indoor space 2 can be suitably measured.

[0065] Here, when the normal mode is executed, heat is more likely to be generated due to the acquisition of detection results from each sensor than when the power saving mode is executed. However, when there is a person in the indoor space 2, ventilation promotes air circulation in the indoor space 2, and the temperature in the indoor space 2 is adjusted by an air conditioner, so that heat is less likely to build up inside the housing 10.

[0066] Moreover, according to the sensor device 1 as described above, it is possible to accurately determine whether or not a person is present in the indoor space 2. That is, the human presence sensor 21 can detect a person within the detection range shown in Fig. 3, but if the person is outside the detection range or if the person is blocked by a wall or an object, it is difficult to detect the person even if the person is in the indoor space 2. According to the sensor device 1, it is possible to accurately determine whether or not a person is present in the indoor space 2 by using both the detection result by the human presence sensor 21 and the detection result by the sound pressure sensor 22 (step S10: YES, step S11, step S20: YES, step S24).

[0067] It should be noted that the first mode execution process and the second mode execution process shown in the flowcharts of FIGS. 4 and 5 are merely examples, and the first mode execution process and the second mode execution process are not limited to the above examples and can be modified as appropriate.

[0068] For example, the second mode execution process shown in the flowchart of Fig. 5 may be modified as shown in the flowchart of Fig. 6. The modified example of Fig. 6 differs from the example of Fig. 5 mainly in that the order of execution of the judgment based on the detection result of the sound pressure sensor 22 and the judgment based on the elapsed period T is switched. Specifically, the modified example of Fig. 6 switches the processing of steps S21 to S23 and the processing of steps S24 to S25 in the flowchart of Fig. 5.

[0069] A modified example of the second mode execution process will be described below with reference to the flowchart of Fig. 6. Note that, in the following, descriptions similar to those in the flowchart of Fig. 5 will be omitted as appropriate.

[0070] Step S20 is the same process as step S20 in Fig. 5. If the control unit 50 determines that the human detection flag is on, the process proceeds to step S21A. On the other hand, if the control unit 50 determines that the human detection flag is not on (off), the second mode execution process ends.

[0071] Step S21A corresponds to step S24 in Fig. 5. If the control unit 50 determines that the detection result of the sound pressure sensor 22 is 50 dB or more, the process proceeds to step S22A. On the other hand, if the control unit 50 determines that the detection result of the sound pressure sensor 22 is less than 50 dB, the process proceeds to step S23A.

[0072] Step S22A is a process corresponding to step S25 in Fig. 5. After executing the process of step S22A, the control unit 50 ends the second mode execution process.

[0073] Step S23A corresponds to step S21 in Fig. 5. If the control unit 50 determines that the elapsed period T is 300 seconds or more, the process proceeds to step S24A. On the other hand, if the control unit 50 determines that the elapsed period T is less than 300 seconds, the second mode execution process ends.

[0074] Step S24A is a process corresponding to step S22 in Fig. 5. After executing the process of step S24A, the control unit 50 proceeds to the process of step S25A.

[0075] Step S25A is a process corresponding to step S23 in Fig. 5. After executing the process of step S25A, the control unit 50 ends the second mode execution process.

[0076] Even when the above-mentioned processing is performed, the same effects as those of the second mode execution processing shown in FIG. 5 are achieved.

[0077] As described above, the sensor device 1 according to this embodiment has the following features: A plurality of sensors (sensor unit 20) capable of detecting the internal environment of an indoor space 2 of a building (house); A control unit 50 capable of executing processes related to the plurality of sensors (sensor unit 20); A sensor device 1 comprising: The plurality of sensors (sensor unit 20) The system includes at least a human sensor 21 capable of detecting a person and a sound pressure sensor 22 capable of detecting sound, The control unit 50 Using the detection results of the human presence sensor 21 and the sound pressure sensor 22, it is possible to determine whether or not a person is present in the indoor space 2 in which the sensor device 1 is installed.

[0078] With this configuration, it is possible to accurately determine whether or not there is a person in the indoor space 2. That is, it is possible to determine whether or not there is a person in the indoor space 2 by using the human detection result by the human detection sensor 21 and the sound detection result by the sound pressure sensor 22. As a result, even if it is difficult to determine whether or not there is a person using only the human detection sensor 21, for example, when there is a person outside the detection range of the human detection sensor 21 in the indoor space 2, it is possible to accurately determine whether or not there is a person in the indoor space 2 by using the sound detection result by the sound pressure sensor 22.

[0079] In addition, the control unit 50 a normal mode in which a detection result of at least one of the plurality of sensors (sensor unit 20) is obtained at a first interval, and a power saving mode in which a detection result of the sensor is obtained at a second interval longer than the first interval, When it is determined that there is a person in the indoor space 2, the normal mode is executed, and when it is determined that there is no person in the indoor space 2, the power saving mode is executed.

[0080] By configuring in this way, it is possible to perform suitable control. That is, when the control unit 50 determines that there is a person in the indoor space 2, it is possible to obtain the detection results of the sensor at relatively short intervals and detect the internal environment of the indoor space 2. Also, when the control unit 50 determines that there is no person in the indoor space 2, it is possible to reduce the power consumption related to obtaining the detection results by obtaining the detection results of the sensor at relatively long intervals.

[0081] In addition, the control unit 50 When a first detection result is obtained by the human presence sensor 21 that a person has been detected (step S10: YES, step S11, step S20), and a second detection result is obtained by the sound pressure sensor 22 that the loudness of the sound is equal to or greater than a predetermined threshold (step S24: YES), it is possible to determine that a person is present in the indoor space 2. If the first detection result is obtained (step S10: YES, step S11, step S20), but the second detection result is not obtained (step S24: NO), it can be determined that there is no person in the indoor space 2.

[0082] With this configuration, it is possible to more accurately determine whether or not there is a person in the indoor space 2. That is, in addition to the first detection result that the human presence sensor 21 has detected a person, it is possible to accurately determine whether or not there is a person in the indoor space 2 by determining whether or not the volume of the sound detected by the sound pressure sensor 22 is equal to or greater than a predetermined threshold (presence or absence of a second detection result).

[0083] In addition, the control unit 50 Whether or not the second detection result has been obtained is determined based on whether or not the second detection result has been obtained within a predetermined period of time (steps S21, S22) from when the first detection result was obtained (step S10: YES, step S11, step S20) or when the second detection result was last obtained (step S24: YES, step S25).

[0084] With this configuration, it is possible to more accurately determine whether or not there is a person in the indoor space 2. That is, if the second detection result is acquired within a predetermined period from when the first detection result was acquired or when the second detection result was last acquired, it is determined that there is a person in the indoor space 2, and if a predetermined period has passed without acquiring a second detection result from when the first detection result was acquired or when the second detection result was last acquired, it is determined that there is no person in the indoor space 2. In this way, it is possible to determine whether or not there is a person in the indoor space 2, taking the predetermined period into consideration.

[0085] In addition, the sensor device 1 includes: The device includes a housing 10 that houses the plurality of sensors (sensor unit 20), The plurality of sensors (sensor unit 20) It includes a temperature sensor (temperature and humidity sensor 24) capable of detecting temperature.

[0086] With this configuration, it is possible to suitably detect the temperature of the indoor space 2. That is, when the power saving mode is executed, the sensor detection results are obtained at relatively long intervals, so that it is possible to suppress the generation of heat that occurs with the acquisition of the detection results. This makes it possible to house multiple sensors (sensor unit 20) including the temperature and humidity sensor 24 together in the housing 10, while suppressing the heat trapped inside the housing 10 from affecting the temperature detection using the temperature sensor (temperature and humidity sensor 24), thereby making it possible to suitably detect the temperature of the indoor space 2.

[0087] The sensor unit 20 according to this embodiment is one embodiment of a plurality of sensors according to the present invention. The temperature and humidity sensor 24 according to this embodiment is one embodiment of a temperature sensor according to the present invention.

[0088] Although the embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0089] For example, in the present embodiment, in the power saving mode, the power consumption is reduced by relatively lengthening the interval for obtaining the detection results of each sensor of the sensor unit 20, but the present invention is not limited to such an embodiment. As an embodiment for reducing the power consumption, various embodiments can be adopted, such as stopping the detection of each sensor itself.

[0090] In the present embodiment, the sensors in the sensor unit 20 of the sensor device 1 other than the human sensor 21 and the sound pressure sensor 22 are the acceleration sensor 23, the temperature and humidity sensor 24, the illuminance sensor 25, and the air pressure sensor 26, but are not limited to this. As the sensors in the sensor unit 20 other than the human sensor 21 and the sound pressure sensor 22, various sensors capable of detecting the internal environment of the house can be used.

[0091] In the present embodiment, in the second mode execution process shown in Fig. 5, the normal mode and the power saving mode are switched based on the elapsed period T from the last time the human detection flag was turned on (step S10: YES, step S11, or step S24: YES, step S25), but the present invention is not limited to this. For example, the normal mode and the power saving mode may be switched without using the elapsed period T. Specifically, the control unit 50 can execute the following control.

[0092] After executing the process of step S20 (step S20: YES), the control unit 50 proceeds to the process of step S24. If the control unit 50 determines in step S24 that the detection result of the sound pressure sensor 22 is 50 dB or more, the control unit 50 proceeds to the process of step S25 and executes the normal mode. On the other hand, if the control unit 50 determines that the detection result of the sound pressure sensor 22 is less than 50 dB, the control unit 50 executes the process equivalent to steps S22 and S23 and executes the power saving mode.

[0093] In the present embodiment, the determination based on the detection result of the sound pressure sensor 22 in the second mode execution process shown in Fig. 5 (step S24) is configured to use a threshold value (50 dB) for the determination, but is not limited to this. For example, without setting the threshold value, the normal mode may be executed if the sound pressure sensor 22 detects sound, and the power saving mode may be executed if the sound sensor does not detect sound.

[0094] In addition, in the present embodiment, the detection result of the human presence sensor 21 and the detection result of the sound pressure sensor 22 are used to determine whether or not there is a person in the indoor space 2, and a process of switching between the normal mode and the power saving mode is executed based on the above determination, but the present invention is not limited to this configuration. For example, the determination of whether or not there is a person in the indoor space 2 using the detection results of the human presence sensor 21 and the sound pressure sensor 22 may be used for other processes such as the operation of lighting and home appliances in the indoor space 2, instead of switching between the normal mode and the power saving mode.

[0095] In addition, in the present embodiment, an example has been described in which the sensor device 1 is installed on the wall 3, but the present invention is not limited to this. The sensor device 1 can be installed on various targets other than the wall 3, such as a ceiling or a table.

[0096] In the present embodiment, the sensor device 1 is installed in a house, but the present invention is not limited to this. The building in which the sensor device 1 is installed may be a commercial facility, a business establishment such as a factory, or a public facility such as a government office. [Explanation of symbols]

[0097] 1 Sensor device 20 Sensor section 21 Human Sensor 22 Sound pressure sensor 50 Control section

Claims

1. A plurality of sensors capable of detecting an internal environment of an indoor space of a building; A control unit capable of executing a process related to the plurality of sensors; A sensor device comprising: The plurality of sensors include The system includes at least a human presence sensor capable of detecting a person and a sound pressure sensor capable of detecting a sound, The control unit is The detection result of the human presence sensor and the detection result of the sound pressure sensor are used to determine whether or not a person is present in the indoor space in which the sensor device is installed, a normal mode in which a detection result of at least one of the plurality of sensors is obtained at a first interval, and a power saving mode in which a detection result of the sensor is obtained at a second interval longer than the first interval, When it is determined that a person is present in the indoor space, the normal mode is executed, and when it is determined that no person is present in the indoor space, the power saving mode is executed. When a first detection result indicating that a person has been detected is obtained by the human presence sensor, execution of the normal mode is started; When the normal mode is being executed and a second detection result is obtained by the sound pressure sensor indicating that the loudness of the sound is equal to or greater than a predetermined threshold, the normal mode is continued, whereas when the second detection result is not obtained, the normal mode is terminated and execution of the power saving mode is started. Sensor device.

2. The control unit is determining whether the second detection result has been acquired based on whether the second detection result has been acquired within a predetermined period of time from when the first detection result has been acquired or when the second detection result has been last acquired; The sensor device according to claim 1 .

3. a housing for housing the plurality of sensors; The plurality of sensors include A temperature sensor capable of detecting a temperature. The sensor device according to claim 1 or 2.

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