JP2022139030A - audio output system - Google Patents

Abstract

To appropriately transmit event content to users.SOLUTION: This voice output system comprises: a first infrared sensor unit 31 having a first infrared projection unit 32 and a first infrared detection unit 33; a second infrared sensor unit 41 having a second infrared projection unit 42 and a second infrared detection unit 43; and a person determination unit 15 determining, on the basis of the detection information of the first infrared detection unit 33 and second infrared detection unit 43, whether or not a person exists in a near-side area 22a within the range of a first detection area 22. When the person determination unit 15 determines that a person exists in the near-side area 22a within the range of the first detection area 22 while an event occurs, a control unit performs voice output control to actuate a voice output unit so that a voice corresponding to the event is output, and when the person determination unit 15 determines that no persons exist in the near-side area 22a within the range of the first detection area 22, the control unit disables performing of voice output control.SELECTED DRAWING: Figure 2

Description

The present invention relates to an audio output system provided with an audio output unit that outputs audio.

In such an audio output system, when an event occurs that requires audio data such as disaster prevention information or climate information to be output as audio, the audio data corresponding to the event is sent to the audio output unit, and the audio output unit outputs the audio data. By outputting data by voice, the content of an event such as disaster prevention information or weather information that has occurred is communicated to the user (see, for example, Patent Document 1).

When an event such as disaster prevention information or climate information occurs, the user may not be near the audio output unit, and even if the audio data is output as audio, the content of the event may not be conveyed to the user. Therefore, in the system described in Patent Document 1, a human detection unit capable of detecting whether or not a person exists in the detection area is provided, and when an event requiring voice output of audio data occurs, the human presence detection unit is provided. On the condition that the feeling detection unit detects a person, the audio output unit outputs the audio data as audio.

JP 2020-155956 A

The human detection unit of Patent Document 1 includes an infrared light projection unit that projects infrared rays toward the detection area, and an infrared detection unit that can detect infrared rays that enter from the direction of the detection area. The presence or absence of a person is determined based on the detected information.

Such a human detection unit is an optical type using infrared rays or the like, and its detection area is a relatively wide range. Therefore, even if a person exists at a location away from the audio output unit or the like, the presence of the person is detected by the human detection unit, and the audio output unit outputs audio data. Therefore, even in situations where it is difficult to hear the audio output, such as when the user is far away from the audio output unit, there is a possibility that the event content will not be conveyed to the user due to the audio output. There was room.

In view of this situation, a main object of the present invention is to provide an audio output system capable of appropriately transmitting event contents to users.

A first characteristic configuration of the present invention includes a first infrared light projecting section that projects infrared rays toward a first detection area, and a first infrared detection section that can detect infrared rays incident from the direction of the first detection area. a first infrared sensor unit having;
A range including a far side area on the far side within the range of the first detection area is defined as a second detection area, and a second infrared light projecting unit that projects infrared rays toward the second detection area, and a second detection area a second infrared sensor unit having a second infrared detection unit capable of detecting infrared rays incident from a direction;
an audio output unit that outputs audio;
a control unit for controlling the operating state of the audio output unit;
a person determination unit that determines whether or not a person exists in the vicinity side area within the range of the first detection area based on the detection information of the first infrared detection unit and the second infrared detection unit;
In a state where the audio output unit needs to output the audio data as audio, when the person determination unit determines that a person exists in the vicinity side area within the range of the first detection area, the The control unit performs audio output control to operate the audio output unit so as to output audio corresponding to the event,
The control unit prohibits the execution of the voice output control when the person determination unit determines that there is no person in the near side area within the range of the first detection area.

If there is no person in the detection area, the infrared rays projected from the infrared projection unit are reflected by the floor of the detection area, etc., and are detected by the infrared detection unit. amount) remains constant. On the other hand, if a person exists in the detection area, the infrared light projected from the infrared light projecting section will be reflected by the person, and the intensity of the infrared light detected by the infrared detecting section will increase. . As a result, whether or not the detection value of the infrared detection unit has increased is detected. For example, when the detection value of the infrared detection unit becomes larger than a set comparison reference value, it is determined that a person exists in the detection area. can be done.

Therefore, according to this configuration, in addition to the first infrared sensor having the first detection area as the detection area, the second infrared sensor having the detection area including the far side area on the far side within the range of the first detection area. It has an infrared sensor. As a result, when a person exists in the vicinity side area of the first detection area, the detection value of the first infrared detection section in the first infrared sensor section increases, but the value detected by the second infrared detection section in the second infrared sensor section increases. does not increase. On the other hand, when a person exists in the far side area of the first detection area, not only the detection value of the first infrared detection unit in the first infrared sensor unit, but also the second infrared detection unit in the second infrared sensor unit is also increased.

In this way, not only whether a person exists within the range of the first detection area, but also whether a person exists within the range of the first detection area, whether the person exists in the near side area or the far side area can be determined. The detection value of the first infrared detection section and the detection value of the second infrared detection section are different depending on whether or not they exist in the area. The person determination unit can determine whether or not a person exists in the near side area within the range of the first detection area by capturing the difference in the detection values.

According to this configuration, in a state where an event has occurred, when the person determination unit determines that there is no person in the vicinity side area within the range of the first detection area, the control unit prohibits the execution of the audio output control. Then, when the person determination unit determines that a person exists in the vicinity side area within the range of the first detection area, the control unit executes voice output control. As a result, the user exists in the near side area within the range of the first detection area, and in a situation where the user can easily hear the audio output, it is possible to perform the audio output control, so that the content of the event can be used appropriately. can be communicated to

A second characteristic configuration of the present invention is that when the person determination unit detects the presence of a person in the first detection area and does not detect the presence of a person in the second detection area, When it is determined that a person exists in the side area, the presence of a person is detected in the first detection area and the presence of a person is not detected in the second detection area, the vicinity side area within the range of the first detection area. It is determined that there is no person in

According to this configuration, the person determination unit uses the first infrared sensor unit and the second infrared sensor unit to detect the presence or absence of a person using the infrared sensor unit. It is possible to appropriately determine whether or not a person exists in the vicinity side area within the range of the first detection area only by detecting the presence or absence of a person in each of the above. As a result, only by performing detection processing similar to the detection of the presence or absence of a person using the infrared sensor unit, it is possible to determine whether a person exists in the vicinity side area within the range of the first detection area without performing special processing. It can be determined whether or not, and simplification of the control configuration of the determination process can be achieved.

In the third characteristic configuration of the present invention, the second detection area includes a far side area within the range of the first detection area and an adjacent area outside the range of the first detection area adjacent to the far side of the far side area. The point is that the range is set to include .

In setting the second detection area to a range including the far side area on the far side within the range of the first detection area, for example, if only the far side area of the first detection area is the second detection area, the first infrared sensor and the second infrared sensor unit, it is necessary to perform a time-consuming adjustment work of adjusting the second detection area to be narrower than the first detection area, which leads to deterioration of workability.

Therefore, according to this configuration, the second detection area includes a far side area within the range of the first detection area and an adjacent area outside the range of the first detection area adjacent to the far side area farther than the far side area. set in the range. As a result, there is no need to perform time-consuming adjustment work such as adjusting the second detection area to be narrower than the first detection area, and workability can be improved.

Diagram showing the overall schematic configuration of the audio output system Diagram showing the schematic configuration of the alarm device Schematic diagram showing determination by a person determination unit using a first infrared sensor unit and a second infrared sensor unit Schematic diagram showing determination by a person determination unit using a first infrared sensor unit and a second infrared sensor unit Schematic diagram showing determination by a person determination unit using a first infrared sensor unit and a second infrared sensor unit Flowchart showing the operation of the audio output system

An embodiment of an audio output system according to the present invention will be described based on the drawings.
When an event occurs that requires audio data such as disaster prevention information and climate information to be output as audio, this audio output system outputs audio data corresponding to the event as audio, enabling various types of information such as weather information and disaster prevention information to be output. It conveys information to users.

As shown in FIG. 1, this voice output system 100 is configured using an alarm device 1 installed in a facility such as a user's residence. As shown in FIG. A unit 18 is provided to notify users in facilities such as residences of event contents.

As shown in FIG. 1, the voice output system 100 includes, in addition to the alarm device 1, a terminal device 2 such as a smartphone for the user to perform various settings and operations, a server device 3 for performing various control and communication, An external device 4 or the like is provided for notifying the occurrence of an event or the like. Each of the alarm device 1, the terminal device 2, and the external device 4 is configured to freely communicate various information with the server device 3 via an information communication network 5 such as the Internet.

The alarm device 1, as shown in FIG. there is The alarm device 1 includes a monitoring sensor unit 14, a person determination unit 15, a temperature/humidity sensor unit 16, a display unit 17, an audio output unit 18, a device-side control unit 19, a device-side storage unit 20, a device-side communication unit 21, and the like. It is

Various information for operating the alarm device 1 is stored in the device-side storage unit 20, and the device-side control unit 19 uses the various information stored in the device-side storage unit 20 to issue an alarm. It controls the operating state of the device 1 . The device-side control unit 19 is configured to be able to transmit and receive various types of information to and from the server device 3 through wired communication or wireless communication via the device-side communication unit 21 .

The monitoring sensor unit 14 includes various sensors such as a gas leak monitoring sensor, a CO (carbon monoxide) monitoring sensor, and a fire monitoring sensor. , gas leaks, CO concentration abnormalities, fires, etc. are monitored.

For example, when the concentration of the detection target gas detected by the gas leak monitoring sensor reaches or exceeds a set value, the device-side control unit 19 determines that there is a gas leak by displaying on the display unit 17 or by outputting sound from the sound output unit 18. Alarm for gas leak. In addition, when the CO concentration detected by the CO monitoring sensor exceeds the set value, the device-side control unit 19 determines that the CO concentration is abnormal, and displays the CO concentration by displaying on the display unit 17 or by outputting audio from the audio output unit 18. Issue an alarm for anomalies. Furthermore, when the fire monitoring sensor detects smoke, heat, etc. caused by a fire, the device-side control unit 19 determines that there is a fire, and issues a fire alarm through display by the display unit 17 and audio output by the audio output unit 18. I do.

The temperature/humidity sensor unit 16 detects the temperature and humidity of the indoor space such as the kitchen including the first detection area 22 . The display unit 17 has lamps and LEDs, and is configured by a display device capable of displaying character information and the like. The audio output unit 18 is composed of, for example, a speaker or the like, and is configured to be capable of outputting various kinds of audio data.

As shown in FIG. 1, the server device 3 includes a server-side control section 51, a server-side storage section 52, a server-side communication section 53, and the like. Various types of information are stored in the server-side storage unit 52, and the server-side control unit 51 controls the operating state of the server device 3 using the various types of information stored in the server-side storage unit 52. ing. The server-side control unit 51 is configured to be capable of various transmissions and receptions with the alarm device 1 and the external device 4 by wired communication or wireless communication via the server-side communication unit 53 .

The external device 4 is configured to notify the server device 3 of the occurrence of an external event such as disaster prevention information or climate information. For example, in the case of disaster prevention information, the external device 4 notifies the server device 3 of disaster prevention information such as "earthquake occurred" assuming that an event occurred at the timing of an earthquake. In the case of climate information, the external device 4 sends the updated weather forecast (for example, "Today's weather is sunny") to the server device assuming that an event has occurred at the timing when the weather forecast or the like is updated. 3 is notified.

In the server device 3, when receiving the notification that an event has occurred from the external device 4, the server-side control unit 51 acquires audio data corresponding to the event from the server-side storage unit 52, and stores the acquired audio data. It is sending to the alarm device 1. As a result, in the alarm device 1, the device-side control section 19 outputs the audio data transmitted from the server device 3 by the audio output section 18, thereby conveying the details of the event to the user.

For example, when an earthquake occurs, the server device 3 is notified of the occurrence of the earthquake from the external device 4, and the server-side control unit 51 stores voice data corresponding to the occurrence of the earthquake from the server-side storage unit 52. (audio data such as “earthquake occurred”) and transmits the audio data to the alarm device 1 . In the alarm device 1, the device-side control unit 19 causes the voice output unit 18 to output voice data such as "earthquake occurred" transmitted from the server device 3, thereby notifying the user that an earthquake has occurred. ing.

When the weather forecast is updated, the external device 4 notifies the server device 3 that the weather forecast has been updated, and the server-side control unit 51 updates the updated weather forecast from the server-side storage unit 52. Corresponding voice data (voice data such as "Today's weather is fine") is acquired, and the voice data is transmitted to the alarm device 1. FIG. In the alarm device 1, the device-side control unit 19 uses the voice output unit 18 to output voice data such as "Today's weather is fine" transmitted from the server device 3, and uses the updated weather forecast. communicated to people.

In this manner, in the audio output system 100, when an event occurs outside by the control units such as the server-side control unit 51 and the device-side control unit 19, the information corresponding to the event is sent to the external device 4→ Communication is performed in the order of the server device 3 →alarm device 1, and voice output control is performed to output voice data corresponding to the event from the voice output unit 18. FIG. For example, climate information is not limited to weather forecasts, but it is also possible to voice output "rain clouds approaching" at the timing when rain clouds are approaching, or output "weather warning issued" at the timing when a weather warning is issued. can also

The content of events in voice output control is not limited to disaster prevention information and climate information. Audio data corresponding to traffic information can also be output as audio, and various event contents can be applied.

In this audio output system 100, not only when an event occurs outside but also when an event occurs inside the facility, the controller such as the device-side controller 19 outputs audio data corresponding to the event. is output from the audio output unit 18 as audio output control. Since the voice output system 100 uses the alarm device 1 that monitors events to be monitored such as gas leaks, CO concentration abnormalities, and fires, it is possible to warn of monitored events such as gas leaks, CO concentration abnormalities, and fires. When an event is detected by the apparatus 1 , the audio output unit 18 outputs audio data corresponding to the monitored event assuming that an event has occurred.

For example, as shown in FIG. 2, when the device-side control unit 19 detects the occurrence of a gas leak based on the detection information of the monitoring sensor unit 14, the device-side control unit 19 determines that an event has occurred and displays a gas leak message such as "gas leak occurrence". is obtained from the apparatus-side storage unit 20, and the audio output unit 18 outputs the audio data corresponding to the gas leakage such as "gas leakage". In addition, even when the device-side control unit 19 detects an abnormality in the CO concentration or the occurrence of a fire, the device-side control unit 19 acquires audio data corresponding to them from the device-side storage unit 20, and outputs the acquired audio data to the audio output unit 18. Audio output.

The alarm device 1 includes not only the monitoring sensor section 14 but also a temperature and humidity sensor section 16 that detects the temperature and humidity of the indoor space including the first detection area 22 . Therefore, based on the information detected by the temperature and humidity sensor unit 16, the device-side control unit 19 determines whether there is a possibility that the temperature and humidity in the indoor space will rise and heatstroke or the like will occur, and It is determined whether the temperature and humidity environment of the indoor space is in an abnormal state, such as whether the humidity is low and the room is in a dry state.

When the device-side control unit 19 determines that the temperature and humidity environment in the indoor space is in an abnormal state, the device-side control unit 19 acquires audio data corresponding to the abnormal state of the temperature and humidity environment from the device-side storage unit 20, and acquires the audio data. The resulting audio data is output as audio by the audio output unit 18 . At this time, as the voice data corresponding to the abnormal temperature and humidity environment, if there is a possibility of heat stroke, etc., voice data such as "heat stroke caution" , and voice data such as "Caution for dryness".

Further, for example, voice data of fixed phrases such as "Today is trash day" is stored in the server-side storage unit 52 or the device-side storage unit 20, and the date and time for outputting voice data of the fixed phrases can be set. can be set. As a result, the control units such as the server-side control unit 51 and the apparatus-side control unit 19, when the set date and time come, assume that an event has occurred, and output voice data of fixed phrases such as "Today is garbage day." Audio output control for outputting audio from the output unit 18 can also be performed.

The occurrence of an event is a prerequisite for the audio output system 100 to perform audio output control. can be set as appropriate.

Since the event may not occur at the timing intended by the user, the content of the event cannot be communicated to the user if the audio output system 100 only performs audio output control in accordance with the occurrence of the event. can be difficult. Therefore, in the audio output system 100, after confirming that a person exists in the first detection area 22, audio output control is performed in response to the occurrence of an event.

The voice output system 100 is provided with a person determining section 15 for determining whether or not a person exists in the first detection area 22 . The person determination unit 15 does not simply determine whether or not a person exists in the first detection area 22, but rather detects a person in the vicinity side area 22a (see FIGS. Determining whether a person exists or not. As shown in FIGS. 2 to 5, in the first detection region 22, the region on the near side in the far and near direction is defined as a near side region 22a with respect to the installation location of the alarm device 1 having the audio output unit 18. The basin on the far side is the far side region 22b.

In this manner, in the audio output system 100, when the person determination unit 15 determines that a person exists in the vicinity side area 22a within the range of the first detection area 22 in a state where an event has occurred, the server-side control is performed. Control units such as the unit 51 and the device-side control unit 19 perform audio output control for outputting audio data corresponding to the event from the audio output unit 18 . As for the audio output control, when an event occurs, the human determination unit 15 confirms the existence of a person in the vicinity side area 22a within the range of the first detection area 22, and at the first timing, the audio output control is performed. After that, even if the person determination unit 15 confirms that a person exists in the vicinity side area 22a within the range of the first detection area 22, the voice output control is not performed.

A configuration for determining whether or not a person exists in the vicinity side area 22a within the range of the first detection area 22 by the person determination unit 15 will be described below.
In order for the person determination unit 15 to determine whether or not a person exists in the near side area 22a within the range of the first detection area 22, as shown in FIGS. Two infrared sensor units 41 are provided.

As shown in FIG. 2, the first infrared sensor unit 31 includes a first infrared light projecting unit 32 that projects infrared rays toward the first detection area 22, and detects infrared rays incident from the direction of the first detection area 22. It has a possible first infrared detector 33 . On the other hand, the second infrared sensor section 41 sets the range including the far side area 22b on the far side within the range of the first detection area 22 as the second detection area 23, and emits infrared rays toward the second detection area 23. It has a second infrared light projection section 42 that projects light and a second infrared detection section 43 that can detect infrared light incident from the direction of the second detection area 23 . The second detection area 23 is set within the range of the first detection area 22 so as to include only the far side area 22b.

The first infrared light projection unit 32 and the second infrared light projection unit 42 have the same configuration, and include a light emitting element capable of projecting infrared rays, and an irradiation range and an irradiation angle of the infrared light projected from the light emitting element. An optical lens or the like that can adjust the The first infrared detection unit 33 and the second infrared detection unit 43 have the same configuration, are sensitive to infrared rays, and are photoelectric conversion elements capable of outputting electrical signals corresponding to the intensity of the received infrared rays. etc. is provided.

As described above, the first infrared sensor section 31 and the second infrared sensor section 41 have the same configuration, except that the detection areas are different. As for the detection area, as shown in FIGS. 2 to 5, the first infrared sensor section 31 includes a near side area 22a and a far side area 22b within the range of the first detection area 22, the first detection area 22 On the other hand, the second infrared sensor part 41 is the far side area 22b within the range of the first detection area 22 and the range of the first detection area 22 adjacent to the far side from the far side area 22b The second detection area 23 is a range including the adjacent area 24 outside.

For example, when there is no person in the first detection area 22 or the second detection area 23, the infrared rays projected from the first infrared light projection unit 32 or the second infrared light projection unit 42 are emitted from the first detection area 22. , and is reflected by the floor 11 and the like around the second detection area 23 and detected by the first infrared detection section 33 and the second infrared detection section 43 . Therefore, the infrared detection values detected by the first infrared detection section 33 and the second infrared detection section 43 are substantially constant. On the other hand, when a person is present in the first detection area 22 or the second detection area 23, the infrared rays projected from the first infrared light projection section 32 or the second infrared light projection section 42 are used for the first detection. It is reflected by a person existing in the area 22 and detected by the first infrared detection section 33 and the second infrared detection section 43 . Therefore, the intensity of the infrared rays detected by the first infrared detection section 33 and the second infrared detection section 43 is increased, and the detection value of the infrared rays detected by the first infrared detection section 33 and the second infrared detection section 43 is also increased. will increase.

Therefore, the person determination unit 15 captures how the detection values of the infrared rays detected by the first infrared detection unit 33 and the second infrared detection unit 43 change, and It is determined whether or not a person exists in the detection area 23 . If the first detection value of the first infrared detection unit 33 is greater than the comparison reference value (threshold value), the human determination unit 15 detects the presence of a person in the first detection area 22, and the second infrared detection unit If the second detection value of 43 is greater than the comparison reference value (threshold value), the presence of a person in the second detection area 23 is detected.

Incidentally, the human determination unit 15 repeatedly performs the operation of detecting the presence or absence of a person based on the detection values of the first infrared detection unit 33 and the second infrared detection unit 43 at a set period (for example, 1 second). When the presence of a person is detected continuously (for example, three times), it is determined that the presence of a person is present, and the determined value is output to the server device 3 or the like. Further, when the presence of a person is not detected continuously for a set period of time (for example, one minute), the person determination unit 15 determines that no person exists, and outputs the determined value to the server device 3 or the like. ing.

As described above, the human determination unit 15 detects the presence or absence of a person in each of the first detection area 22 and the second detection area 23. Therefore, as shown in FIG. is detected and the presence of a person is not detected in the second detection area 23, it is determined that the person A is present in the vicinity side area 22a within the range of the first detection area 22. FIG. Further, as shown in FIGS. 4 and 5, the human determination unit 15 detects the presence of a person in the first detection area 22 and does not detect the presence of a person in the second detection area 23. It is determined that there is no person in the vicinity side area 22 a within the range of the 1 detection area 22 .

As shown in FIG. 3, when a person A exists in the vicinity side area 22a within the range of the first detection area 22, based on the detection information of the first infrared detection section 33 in the first infrared sensor section 31, Although the presence of a person is detected in the first detection area 22, the presence of a person is not detected in the second detection area 23 based on the detection information of the second infrared detection section 43 in the second infrared sensor section 41. The unit 15 can appropriately determine that the person A is present in the vicinity side area 22 a within the range of the first detection area 22 .

As shown in FIG. 4, when a person A exists in the far side area 22b within the range of the first detection area 22, based on the detection information of the first infrared detection section 33 in the first infrared sensor section 31, Although the presence of a person is detected in the first detection area 22, the presence of a person is also detected in the second detection area 23 based on the detection information of the second infrared detection section 43 in the second infrared sensor section 41. , the presence of a person is detected in the first detection area 22 and the presence of a person is not detected in the second detection area 23 . It can be appropriately determined that the person A is not present in the side area 22a.

As shown in FIG. 5, when the person A exists in the adjacent area 24 outside the range of the first detection area 22 adjacent to the far side of the far side area 22b of the first detection area 22, the first infrared sensor Based on the detection information of the first infrared detection unit 33 in the unit 31, the presence of a person is not detected in the first detection area 22, and based on the detection information of the second infrared detection unit 43 in the second infrared sensor unit 41, Since the presence of a person is detected in the second detection area 23, the presence of a person is detected in the first detection area 22 and the presence of a person is not detected in the second detection area 23. The determination unit 15 can appropriately determine that the person A does not exist in the vicinity side area 22 a within the range of the first detection area 22 .

The operation of the audio output system 100 will be described below based on the flowchart of FIG.
In the audio output system 100, as shown in FIG. 6, when an event occurs, the person determining unit 15 determines whether or not a person exists in the near side area 22a within the range of the first detection area 22. (If Yes in step #1, step #2).

When the person determination unit 15 determines that a person exists in the vicinity side area 22a within the range of the first detection area 22, the control units such as the server-side control unit 51 and the device-side control unit 19 respond to the event. The audio output control is executed so as to output the audio (if Yes in step #2, step #3). On the other hand, when the person determination unit 15 determines that there is no person in the vicinity side area 22a within the range of the first detection area 22, the control of the server side control unit 51, the device side control unit 19, etc. section prohibits the execution of voice output control (if No in step #2, step #4).

[Another embodiment]
Another embodiment of the present invention will be described. It should be noted that the configuration of each embodiment described below is not limited to being applied alone, and can be applied in combination with the configurations of other embodiments.

(1) In the above embodiment, the audio output system 100 is configured using the alarm device 1, but not limited to the alarm device 1, for example, any audio output device having the audio output unit 18 The type of device to be used can be changed as appropriate.

(2) In the above embodiment, the server device 3 is provided. However, the server device 3 can be omitted by, for example, providing the device-side control unit 19 or the like with various functions of the server-side control unit 51. .

15 person determination unit 18 voice output unit 19 device side control unit (control unit)
22 First detection area 22a Near side area 22b Far side area 23 Second detection area 24 Adjacent area 31 First infrared sensor section 32 First infrared light projection section 33 First infrared detection section 41 Second infrared sensor section 42 Second infrared ray Light projecting unit 43 Second infrared detection unit 51 Server-side control unit (control unit)
100 audio output system

Claims (3)

a first infrared sensor unit having a first infrared light projection unit for projecting infrared rays toward the first detection area and a first infrared detection unit capable of detecting infrared rays incident from the direction of the first detection area;
A range including a far side area on the far side within the range of the first detection area is defined as a second detection area, and a second infrared light projecting unit that projects infrared rays toward the second detection area, and a second detection area a second infrared sensor unit having a second infrared detection unit capable of detecting infrared rays incident from a direction;
an audio output unit that outputs audio;
a control unit for controlling the operating state of the audio output unit;
a person determination unit that determines whether or not a person exists in the vicinity side area within the range of the first detection area based on the detection information of the first infrared detection unit and the second infrared detection unit;
In a state where the audio output unit needs to output the audio data as audio, when the person determination unit determines that a person exists in the near side area within the range of the first detection area, the The control unit performs audio output control to operate the audio output unit so as to perform audio output corresponding to the event,
An audio output system in which the control unit prohibits the execution of the audio output control when the person determination unit determines that there is no person in the near side area within the range of the first detection area. The person determination unit determines that a person exists in the vicinity side area within the range of the first detection area when the presence of a person is detected in the first detection area and the presence of a person is not detected in the second detection area. Claim to determine that there is no person in the vicinity side area within the range of the first detection area in cases other than the state of detecting the presence of a person in the first detection area and not detecting the presence of a person in the second detection area. Item 1. The audio output system according to item 1. The second detection area is set to a range including a far side area within the range of the first detection area and an adjacent area outside the range of the first detection area adjacent to the far side area farther than the far side area. Item 3. The audio output system according to Item 1 or 2.

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