JP6131375B1 - Detection apparatus and detection method - Google Patents

Abstract

An object of the present invention is to improve the accuracy of detecting a living body. In the detection apparatus, the reception sensitivity in a first range of wavelengths that are easily absorbed by a living body in a range of wavelengths of visible light and infrared rays is different in reception sensitivity in a second range different from the first range. A first light receiving portion higher than the first light receiving portion, a second light receiving portion whose reception sensitivity in the second range is higher than a reception sensitivity in the first range, and a light amount received by the first light receiving portion. And a detection unit that detects the presence of a living body based on the amount of light received by the second light receiving unit. [Selection] Figure 2

Description

  The present invention relates to a detection apparatus and a detection method.

  2. Description of the Related Art Conventionally, a technique for detecting a movement of a living body such as a person or an animal using a sensor is known. In this sensor, for example, infrared rays emitted from a living body are received, and the living body is detected using a difference in the amount of infrared rays due to a temperature difference between the living body and the background.

Japanese Patent Application Laid-Open No. 2014-102083

  However, in the prior art, since the detection is performed using the temperature difference, there is a problem that the detection accuracy is lowered, for example, in summer or when a warm object exists in the background.

  Therefore, an object is to improve the accuracy of detecting a living body.

In the detection device, the reception sensitivity in the first range of wavelengths that are easily absorbed by the living body in the visible light and infrared wavelength ranges is higher than the reception sensitivity in the second range different from the first range. One light receiving unit, a second light receiving unit whose reception sensitivity in the second range is higher than the reception sensitivity in the first range, the amount of light received by the first light receiving unit, and the second A detection unit that detects the presence of a living body based on the amount of light received by the light receiving unit , wherein the detection unit receives the amount of light received by the first light receiving unit, or the second light receiving unit. When the amount of light received by the light receiving unit changes by a predetermined threshold value or more, the amount of light received by each of the first light receiving unit and the second light receiving unit is changed to the first light receiving unit and the second light receiving unit. Of the amount of light received by each part It is stored as a period value.

  It is possible to improve the accuracy of detecting a living body.

It is a figure showing an example of composition of a detection system concerning an embodiment. It is a figure which shows the structural example of the detection apparatus which concerns on 1st Embodiment. It is a flowchart which shows an example of a detection process. It is a figure explaining the wavelength range of the light which is easy to be absorbed by the skin of a biological body among the wavelength ranges of visible light and infrared rays. It is a figure explaining the receiving sensitivity with respect to the wavelength of the light of a 1st light-receiving part and a 2nd light-receiving part, and the absorbency with respect to the wavelength of the light of the skin of a biological body. It is a flowchart which shows an example of the abnormality determination process which concerns on 1st Embodiment. It is a figure which shows the structural example of the detection apparatus which concerns on 2nd Embodiment. It is a flowchart which shows an example of the abnormality determination process which concerns on 2nd Embodiment. It is a figure explaining the example of arrangement | positioning of a 1st light-receiving part and a 2nd light-receiving part. It is a flowchart which shows an example (the 2) of the abnormality determination process which concerns on 2nd Embodiment. It is a figure explaining the example of arrangement of the 1st light sensing portion and the 2nd light sensing portion (the 2). It is a flowchart which shows an example (the 3) of the abnormality determination process which concerns on 2nd Embodiment. It is a figure explaining the example (the 3) of arrangement | positioning of a 1st light-receiving part and a 2nd light-receiving part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration example of a detection system 1 according to an embodiment of the present invention. In FIG. 1, the detection system 1 includes a detection device 10 and an alarm device 20.

  The detection device 10 and the alarm device 20 are communicably connected via a communication line such as a signal line, a LAN (Local Area Network), or a wireless LAN.

  The detection device 10 detects the movement of a living body such as a person or an animal and the presence / absence of the living body. Then, an abnormality is detected based on the detected movement, presence / absence, etc., and the abnormality is notified to the alarm device 20.

  The detection device 10 is installed in a bathroom, a living room, a kitchen, or the like, for example. At least a part of the detection device 10 is incorporated in, for example, a bathroom remote control for remotely controlling a water heater, a bathroom dryer, a remote controller for a bathroom dryer, a bathroom alarm, a kitchen remote controller for remotely controlling a water heater, and a floor heating remote controller. May be. In addition, the detection apparatus 10 is not limited to a bathroom, It can install and use in arbitrary places, such as a toilet, a living room, a kitchen.

  When the alarm device 20 is notified of an abnormality from the detection device 10, the alarm device 20 performs a predetermined notification by sound, light, display, or the like. The installation location of the alarm device 20 is arbitrary, and may be installed outside the bathroom or in the bathroom. The alarm device 20 may be a known kitchen remote controller, for example. In this case, the alarm device 20 performs notification based on, for example, a call signal from a bathroom remote controller in which the detection device 10 is built. The alarm device 20 may be an indoor intercom. In this case, the detection device 10 and the alarm device 20 that is an indoor intercom may be connected by a signal line or the like.

  The detection device 10 and the alarm device 20 may be configured as an integrated device.

[First Embodiment]
<Configuration>
FIG. 2 is a diagram illustrating a configuration example of the detection apparatus 10 according to the first embodiment.

  The detection device 10 detects the presence of a living body based on the amount of light received by the first light receiving unit 11 and the amount of light received by the second light receiving unit 12. As shown in FIG. 2, the detection device 10 includes a first light receiving unit 11, a second light receiving unit 12, a detection unit 13, a determination unit 14, and a notification unit 15.

  The first light receiving unit 11 has a reception sensitivity in a first range (for example, 380 nm to 600 nm) including at least a part of a wavelength that is easily absorbed by a living body in a range of wavelengths of visible light and infrared rays. The sensor is higher than the reception sensitivity in a second range (for example, 600 nm to 780 nm) different from the range. Note that the first range may be, for example, 500 nm to 600 nm.

  The second light receiving unit 12 is a sensor whose reception sensitivity in the second range described above is higher than the reception sensitivity in the first range described above.

  The detection unit 13 changes the intensity (light quantity) of the light detected by the first light receiving unit 11 or the second light receiving unit 12 by a predetermined threshold or more, for example, by turning on / off a lighting fixture in the bathroom or irradiating with sunlight. If so, perform calibration (initialization). Specifically, the detection unit 13 calculates the intensity of light detected by the first light receiving unit 11 and the second light receiving unit 12 during calibration, using the first light receiving unit 11 and the second light receiving unit. 12 is stored as an initial value of each received light intensity.

  In addition, the detection unit 13 includes, for example, a change amount from the initial value of the intensity of the light detected by the first light receiving unit 11 and a second light receiving unit for light having a plurality of wavelengths emitted from a lighting fixture in a bathroom. The living body is detected based on the ratio to the amount of change from the initial value of the intensity of the light detected by 12.

  The determination unit 14 determines whether an abnormality has occurred based on the information detected by the detection unit 13. Based on the information detected by the detection unit 13, the determination unit 14 determines an abnormality such as, for example, the user in the bathtub drowning or the user falling down in the washing area.

  The notification unit 15 notifies the abnormality when the determination unit 14 determines that an abnormality has occurred. For example, the notification unit 15 notifies the abnormality by outputting a ringing tone, a warning sound, and a warning voice message. Further, the notification unit 15 may notify the alarm device 20 of the abnormality and cause the alarm device 20 to output a ringing tone or the like. Moreover, the alerting | reporting part 15 may transmit the message which alert | reports abnormality to the e-mail address etc. of the cohabitant registered beforehand, for example.

<Processing>
≪Detection process≫
Next, the process of detecting a living body by the detection unit 13 will be described with reference to FIG. FIG. 3 is a flowchart illustrating an example of the detection process. In addition, you may perform a detection process regularly, for example. It is assumed that the above-described calibration is performed in advance before the detection process is executed, and the initial values of the received light intensity of the first light receiving unit 11 and the second light receiving unit 12 are stored. .

  In step S <b> 101, the detection unit 13 acquires the intensity of light detected by the first light receiving unit 11 and the second light receiving unit 12.

  Subsequently, the detection unit 13 changes the amount of light detected by the first light receiving unit 11 from the initial value and the amount of change of the light detected by the second light receiving unit 12 from the initial value. The ratio is calculated (step S102).

  Subsequently, the detection unit 13 determines whether or not the calculated ratio is greater than or equal to a predetermined threshold (step S103).

  If the calculated ratio is not equal to or greater than the predetermined threshold (NO in step S103), the process ends.

  When the calculated ratio is equal to or greater than the predetermined threshold (NO in step S103), the detection unit 13 notifies the determination unit 14 that a living body exists (step S104).

  FIG. 4A is a diagram illustrating a wavelength range of light that is easily absorbed by the skin of a living body, in a range of wavelengths of visible light and infrared rays. Focusing on hemoglobin, which is a major component that absorbs light in the skin of a living body, hemoglobin has a wavelength range of visible light (380 nm to 780 nm) and an infrared wavelength range, for example, as shown in FIG. 4A. In the wavelength range 501 of 380 nm to 600 nm, light is easily absorbed. Therefore, the light in the wavelength range is easily absorbed by the living body skin.

  FIG. 4B is a diagram illustrating the reception sensitivity (relative intensity) of the first light receiving unit 11 and the second light receiving unit 12 with respect to the wavelength of light. As shown in FIG. 4B, the reception sensitivity 502 of the first light receiving unit 11 is light that is easily absorbed by living skin (relatively high absorption by living skin) within the visible light and infrared wavelength ranges. In the wavelength range (for example, 380 nm to 600 nm), it is higher than the other ranges. FIG. 4B shows an example in which the reception sensitivity 502 of the first light receiving unit 11 has a peak at about 550 nm and is higher than the other ranges in the wavelength range of 500 nm to 600 nm. . The receiving sensitivity 503 of the second light receiving unit 12 is higher than the receiving sensitivity of the first light receiving unit 11 in a range other than the wavelength range of light that is easily absorbed by the skin of the living body, in the visible light and infrared wavelength ranges. Is also expensive.

  Therefore, when the amount of visible light radiated from a lighting fixture or the like is substantially constant, the intensity of light detected by the first light receiving unit 11 is relatively reduced and detected by the second light receiving unit 12. When the intensity of the emitted light is relatively small, it can be determined that the light is absorbed by the living body. Therefore, a living body can be detected based on the ratio of the amount of change in received light intensity between the first light receiving unit 11 and the second light receiving unit 12.

  Subsequently, the detection unit 13 determines whether movement of the living body is detected (body motion is detected) based on the difference between the ratio calculated in the previous (for example, previous) detection process and the ratio calculated this time. Determination is made (step S105). For example, the detection unit 13 determines that body movement has been detected when the ratio calculated this time has changed by a predetermined threshold or more from the ratio calculated last time, for example. This is because the value of the ratio is affected by body movement.

  If no motion is detected (NO in step S105), the process ends.

  When a motion is detected (YES in step S105), the detection unit 13 notifies the determination unit 14 that a body movement has been detected (step S106), and the process ends.

≪Abnormality judgment processing≫
Next, the abnormality determination process by the determination unit 14 according to the first embodiment will be described with reference to FIG. FIG. 5 is a flowchart illustrating an example of the abnormality determination process according to the first embodiment. The abnormality determination process may be executed periodically, for example.

  In step S201, the determination unit 14 determines whether a person is taking a bath in the bathtub. For example, it is determined that a person is taking a bath when the amount of water increases by a predetermined threshold or more within a predetermined time by a sensor that measures the amount of water provided in the bathtub. Note that whether or not a person is taking a bath may be detected using another known technique.

  If the person is not bathing (NO in step S201), the process is terminated.

  If the person is bathing (YES in step S201), the determination unit 14 determines whether or not a living body is detected by the detection unit 13 (step S202).

  When the living body is not detected (NO in step S202), the determination unit 14 notifies the abnormality using the notification unit 15 (step S203), and ends the process. This is because the case where the living body is not detected by the detection unit 13 despite being bathed is considered to be a case where the living body is sinking under the surface of the bathtub. In this case, for example, the notification unit 15 causes the alarm device 20 to notify a voice such as “Please check whether a person is drowning in the bath”.

  When a living body is detected (YES in step S202), the determination unit 14 determines whether body motion has been detected by the detection unit 13 until a predetermined time has elapsed (step S204).

  If body movement is detected before the predetermined time elapses (YES in step S204), the process ends.

  If body movement is not detected until the predetermined time has elapsed (NO in step S204), the determination unit 14 requests the user to perform a predetermined operation using the notification unit 15 (step S205). For example, the notification unit 15 outputs a message such as “Please press the button safely for confirmation” to the voice or the screen. Thereby, when the state in which the movement of the living body and the water surface of the bathtub is not detected by the detection unit 13 continues for a predetermined time or longer, it is possible to make an inquiry to the user who is taking a bath safely.

  Subsequently, the determination unit 14 determines whether or not a predetermined operation has been received (step S206).

  If a predetermined operation is accepted (YES in step S206), the process is terminated.

  When the predetermined operation is not accepted (NO in step S206), the determination unit 14 determines whether or not body movement is detected by the detection unit 13 (step S207).

  If body movement is detected (YES in step S207), the process ends. Thereby, when a predetermined operation is requested in step S205, the user determines that the operation is safe, for example, by waving his hand in front of the first light receiving unit 11 or the second light receiving unit 12. The unit 14 can be notified.

  If no body movement is detected (NO in step S207), the process proceeds to step S203.

<Modification>
The process of determining whether or not the person in step S201 is bathing in the bathtub may be determined using the first light receiving unit 11 and the second light receiving unit 12 instead of using a sensor for measuring the amount of water. Good.

  When a person goes over the bathtub to enter or leave the bathtub, fluctuations in the intensity of light received by the first light receiving unit 11 and the second light receiving unit 12 are relatively large. Therefore, the determination unit 14 detects a change in intensity of light received by the first light receiving unit 11 and the second light receiving unit 12 within a predetermined period (for example, 3 seconds) equal to or greater than a predetermined threshold and thereafter When the living body is detected by the unit 13, it may be determined that the person is taking a bath in the bathtub, and “being bathed” may be stored. In this case, the determination unit 14 determines that the variation in the intensity of light received by the first light receiving unit 11 and the second light receiving unit 12 within a predetermined period (for example, 3 seconds) is equal to or greater than a predetermined threshold, and thereafter When the living body is not detected by the detection unit 13, it may be determined that the bathing is not being performed in the bathtub and that “not bathing” is not stored.

  Moreover, you may make it the determination part 14 set automatically the conditions determined to straddle a bathtub, for example by machine learning. In this case, for example, the infrared rays received by the first light receiving unit 11 and the second light receiving unit 12 between the time when the living body is detected by the detecting unit 13 and the time when the detecting unit 13 stops detecting the living body. You may learn that the fluctuation pattern of intensity is due to the straddling of the bathtub. Accordingly, it is possible to determine whether or not the user is taking a bath in the bathtub with higher accuracy in accordance with the habit of the straddling operation of the bathtub for each user.

[Second Embodiment]
In the second embodiment, an example in which the detection device 10 includes a plurality of sets of the first light receiving unit 11 and the second light receiving unit 12 will be described. Note that the second embodiment is the same as the first embodiment except for a part thereof, and thus description thereof will be omitted as appropriate. Below, the difference with 1st Embodiment is demonstrated about the detection apparatus 10 which concerns on 2nd Embodiment.

<Configuration>
FIG. 6 is a diagram illustrating a configuration example of the detection apparatus 10 according to the second embodiment. As shown in FIG. 6, the detection apparatus 10 according to the second embodiment includes first light receiving portions 11a and 11b and second light receiving portions 12a and 12b. The first light receiving units 11a and 11b and the second light receiving units 12a and 12b have a lens that absorbs light on a plane or a lens that absorbs light on a plane and its periphery or a pinpoint (point). Also good. Thereby, the 1st light-receiving part 11a, 11b and the 2nd light-receiving part 12a, 12b can receive only light perpendicular | vertical with respect to a sensor surface.

  The detection unit 13 according to the second embodiment uses a set of the first light receiving unit 11a and the second light receiving unit 12a at a place where the first light receiving unit 11a and the second light receiving unit 12a are installed. Detect a living body. Moreover, the living body in the location in which the 1st light-receiving part 11b and the 2nd light-receiving part 12b were installed is detected using the group of the 1st light-receiving part 11b and the 2nd light-receiving part 12b.

≪Abnormality judgment processing≫
Next, the abnormality determination process by the determination unit 14 according to the second embodiment will be described with reference to FIGS. FIG. 7 is a flowchart illustrating an example of the abnormality determination process according to the second embodiment. FIG. 8 is a diagram illustrating an arrangement example of the first light receiving units 11a and 11b and the second light receiving units 12a and 12b. The abnormality determination process may be executed periodically, for example.

  In the following, as shown in FIG. 8, the set of the first light receiving unit 11 a and the second light receiving unit 12 a is relatively above the water surface of the bathtub (hereinafter also referred to as “upper part”). .), And the set of the first light receiving portion 11b and the second light receiving portion 12b is at a relatively lower position (hereinafter also referred to as “lower portion”) at a position above the water surface of the bathtub. It is assumed that it is installed.

  In step S <b> 301, the determination unit 14 is notified by the detection unit 13 that a living body has been detected at “upper location” and “lower location”. In this case, it may be determined that the user is taking a bath in the bathtub and may be stored as “being bathed”. In the case where the living body is detected at the “upper part” and the living body is not detected at the “lower part” after the living body is not detected at the “lower part”, Then, it may be determined that the bath is not being bathed, the fact that the bath is not being bathed is stored, and the processing may be terminated.

  Subsequently, the determination unit 14 determines whether or not the living body is no longer detected at the “upper position” in a state where the living body is detected at the “lower position” (step S302). In step S302, the determination unit 14 may determine whether or not the living body is not detected in the “lower part” after the living body is not detected in the “upper part”. As a result, when the living body is not detected at both the “upper part” and the “lower part” because the living body sinks below the water surface of the bathtub, there is no request for a predetermined operation or a predetermined operation to the user. Anomaly notification can be performed.

  If the living body is detected at the “lower place” and the living body is not detected at the “upper place” (NO in step S302), the process ends.

  When the living body is not detected at the “upper part” in the state where the living body is detected at the “lower part” (YES in step S302), the determination unit 14 determines whether the “upper part” and the “lower part” In step S303, it is determined whether or not a living body has been detected.

  If a living body is detected at “upper part” and “lower part” (YES in step S303), the process ends. In this case, for example, it can be determined that the user has returned to the original posture after bending the neck in the bathtub.

  When a living body is not detected in “upper part” and “lower part” (NO in step S303), the determination unit 14 requests the user for a predetermined operation using the notification unit 15 (step S304). In this case, for example, it can be determined that the user has sunk in the bathtub.

  Subsequently, the determination unit 14 determines whether or not a predetermined operation has been received (step S305).

  If a predetermined operation is accepted (YES in step S305), the process ends.

  When the predetermined operation is not accepted (NO in step S305), the determination unit 14 notifies the abnormality using the notification unit 15 (step S306), and ends the process. This is because it is considered that the living body is sinking under the water surface of the bathtub. In this case, for example, the notification unit 15 causes the alarm device 20 to notify a voice such as “Please check whether a person is drowning in the bath”.

<Modification>
Next, the abnormality determination process performed by the determination unit 14 according to the second embodiment will be described with reference to FIGS. 9 and 10. FIG. 9 is a flowchart illustrating an example (part 2) of the abnormality determination process according to the second embodiment. FIG. 10 is a diagram for explaining an arrangement example (No. 2) of the first light receiving portions 11a and 11b and the second light receiving portions 12a and 12b. The abnormality determination process may be executed periodically, for example.

  In the following, as shown in FIG. 10, the set of the first light receiving unit 11a and the second light receiving unit 12a is installed at a position above the water surface of the bathtub (hereinafter also referred to as “location above the water surface”). In the following description, it is assumed that the set of the first light receiving unit 11b and the second light receiving unit 12b is installed at a position below the water surface of the bathtub (hereinafter also referred to as “location below the water surface”).

  In step S <b> 401, the determination unit 14 is notified from the detection unit 13 that a living body has been detected at “location above the water surface” and “location below the water surface”. In this case, it may be determined that the user is taking a bath in the bathtub and may be stored as “being bathed”. In addition, in a state where a living body is detected at “a place above the water surface”, after the living body is not detected at “a place below the water surface”, “a place above the water surface” and “a place below the water surface” If the living body is no longer detected in step 1, it may be determined that bathing is not being performed in the bathtub, and it may be stored that “not bathing”, and the process may be terminated.

  Subsequently, the determination unit 14 determines whether or not the living body is no longer detected at the “location above the water surface” in a state where the living organism is detected at the “location below the water surface” (step S402). In step S <b> 402, the determination unit 14 may determine whether or not a living organism is no longer detected at a “location below the water surface” after the living organism is no longer detected at a “location above the water surface”. . As a result, when the living body is not detected at both "the place above the water surface" and "the place below the water surface" because the living body has sinked below the water surface of the bathtub, a request for a predetermined operation to the user, Abnormality notification when there is no predetermined operation can be performed.

  If the living body is detected at “location below the water surface” and the living body is not detected at “location above the water surface” (NO in step S402), the process ends.

  When the living body is detected at “location below the water surface” and the living body is not detected at “location above the water surface” (YES in step S <b> 402), the determination unit 14 uses the notification unit 15. The user is requested to perform a predetermined operation (step S403). In this case, for example, it can be determined that the user has sunk in the bathtub.

  Subsequently, the determination unit 14 determines whether or not a predetermined operation has been received (step S404).

  If a predetermined operation is accepted (YES in step S404), the process ends.

  When the predetermined operation is not accepted (NO in step S404), the determination unit 14 notifies the abnormality using the notification unit 15 (step S405), and ends the process.

  It should be noted that if no body movement is detected before a predetermined time has passed at both “location above the water surface” and “location below the water surface”, the process may proceed to step S403.

<Modification>
Next, an abnormality determination process performed by the determination unit 14 according to the second embodiment will be described with reference to FIGS. 11 and 12. FIG. 11 is a flowchart illustrating an example (part 3) of the abnormality determination process according to the second embodiment. FIG. 12 is a diagram illustrating an arrangement example (No. 3) of the first light receiving portions 11a and 11b and the second light receiving portions 12a and 12b. The abnormality determination process may be executed periodically, for example.

  In the following, as shown in FIG. 12, the set of the first light receiving unit 11a and the second light receiving unit 12a is a relatively upper position in the washing place in the bathroom (hereinafter also referred to as “location on the washing place”). The set of the first light receiving unit 11b and the second light receiving unit 12b is installed at a relatively lower position in the washing place in the bathroom (hereinafter also referred to as “location below the washing place”). It will be explained as a thing.

  In step S <b> 501, the determination unit 14 is notified from the detection unit 13 that a living body has been detected at “a location above the washing area” and “a location below the washing area”.

  Subsequently, the determination unit 14 determines whether or not the living body is no longer detected at the “location above the washing area” in a state where the living body is detected at the “location below the washing area” (step S502). In step S502, the determination unit 14 may determine whether or not a living body is detected at the “location under the washing area” after the living body is no longer detected at the “location above the washing area”. Accordingly, when the living body is not detected at the “location on the washing place” because the living body has fallen in the washing place, a request for a predetermined operation to the user or an abnormality notification when there is no predetermined operation can be performed. .

  When the living body is detected at “the place under the washing place” and the living body is not detected at “the place above the washing place” (NO in step S502), the determination unit 14 uses the notification unit 15. Then, a predetermined operation is requested from the user (step S503). In this case, for example, it can be determined that the user has fallen in the washing area.

  Subsequently, the determination unit 14 determines whether a predetermined operation has been received (step S504).

  If a predetermined operation is accepted (YES in step S504), the process ends.

  When the predetermined operation is not accepted (NO in step S504), the determination unit 14 notifies the abnormality using the notification unit 15 (step S505), and ends the process. This is because this case is considered to be a case of falling down in a washing place due to heat shock or the like. In this case, for example, the notification unit 15 causes the alarm device 20 to notify a sound such as “Please check whether a person has fallen in the bath”.

<Summary>
According to the above-described embodiment, the reception sensitivity in the first range of wavelengths that are easily absorbed by the living body in the visible light and infrared wavelength ranges, the reception sensitivity in the second range different from the first range. Based on the amount of light received by the first light receiving unit higher than that of the first light receiving unit and the amount of light received by the second light receiving unit in which the receiving sensitivity in the second range is higher than the receiving sensitivity in the first range. Detecting the presence of a living body. Thereby, it is possible to improve the accuracy of detecting a living body. In addition, since detection is performed using light from a lighting fixture or sunlight, detection can be performed with low power consumption as compared with a method in which detection is performed using, for example, laser light.

<About the detection program>
The detection apparatus 10 according to the present embodiment includes, for example, a volatile storage medium such as a CPU (Central Processing Unit) and a RAM (Random Access Memory), a nonvolatile storage medium such as a ROM (Read Only Memory), a mouse and a keyboard. The computer may include an input device such as a pointing device, a display unit for displaying images and data, and an interface for communicating with the outside.

  In that case, each function of the detection unit 13 and the determination unit 14 included in the detection device 10 can be realized by causing the CPU to execute a program (detection program) describing these functions. The program can also be stored and distributed on a recording medium such as a magnetic disk (floppy disk, hard disk, etc.), optical disk (CD-ROM, DVD, etc.), semiconductor memory, or the like. That is, the above-described processing can be realized by installing a program for causing a computer (hardware) to execute the processing in each configuration described above, for example, on a general-purpose PC or server.

  Moreover, you may implement | achieve part or all of the detection apparatus 10 in embodiment mentioned above as integrated circuits, such as LSI (Large Scale Integration). Each functional block of the detection apparatus 10 may be individually made into a processor, or a part or all of them may be integrated into a processor.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to such specific embodiment, In the range of the summary of this invention described in the claim, various deformation | transformation・ Change is possible.

  The processing in each embodiment can be combined with the processing in other embodiments.

  For example, the detection unit 13 and the determination unit 14 may be realized by cloud computing including one or more computers.

DESCRIPTION OF SYMBOLS 1 Detection system 10 Detection apparatus 11 1st light-receiving part 12 2nd light-receiving part 13 Detection part 14 Determination part 15 Notification part 20 Alarm device

Claims (6)

The first light-receiving unit in which the reception sensitivity in the first range of wavelengths that are easily absorbed by the living body is higher than the reception sensitivity in the second range different from the first range in the visible light and infrared wavelength ranges. When,
A second light receiving unit having a reception sensitivity in the second range higher than the reception sensitivity in the first range;
A detection unit that detects the presence of a living body based on the amount of light received by the first light receiving unit and the amount of light received by the second light receiving unit;
With
When the light amount received by the first light receiving unit or the light amount received by the second light receiving unit changes by a predetermined threshold value or more, the detection unit detects the first light receiving unit and the second light receiving unit. A detection device that stores the amount of light received by each of the first and second light receiving units as an initial value of the amount of light received by each of the first and second light receiving units. The detection device includes:
Said first light receiving portion, having a first and second sets of said second light receiving portion,
A determination unit that determines a user's state based on a detection result based on the first group and a detection result based on the second group installed at a position lower than the first group;
The detection apparatus according to claim 1, further comprising: The detection unit is configured based on a ratio between a change amount from an initial value of the light amount received by the first light receiving unit and a change amount from an initial value of the light amount received by the second light receiving unit. 3. The detection device according to claim 1, wherein the presence of the detection is detected. The detection device according to claim 1, further comprising a notification unit that notifies abnormality based on a detection result by the detection unit. The notifying unit requests a predetermined operation from a user when the living body is present and the living body is not moving for a predetermined time or longer, and notifies the abnormality when the predetermined operation is not accepted. The detection device according to claim 4. The first light-receiving unit in which the reception sensitivity in the first range of wavelengths that are easily absorbed by the living body is higher than the reception sensitivity in the second range different from the first range in the visible light and infrared wavelength ranges. When,
A second light receiving unit having a reception sensitivity in the second range higher than the reception sensitivity in the first range;
A detection device comprising:
When the amount of light received by the first light receiving unit or the amount of light received by the second light receiving unit changes by a predetermined threshold value or more, light is received by each of the first light receiving unit and the second light receiving unit. The stored light amount as an initial value of the light amount received by each of the first light receiving unit and the second light receiving unit;
A process of detecting the presence of a living body based on the amount of light received by the first light receiving unit and the amount of light received by the second light receiving unit;
Detection method to perform.

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