Alarm device and its control method

Abstract

To provide an alarm that can present the state of detection performed by a human sensor in a more easily understandable way, and a method for controlling the same.SOLUTION: A gas alarm 1 comprises: a gas sensor 24 for detecting an abnormality in a monitoring area; a speaker 34 that, when an abnormality in the monitoring area is detected, outputs an abnormal state by sound based on a signal from the gas sensor 24; a human sensor 26 for detecting the presence of a person in its surroundings; and a checking processing unit 38a that executes a checking mode for checking the state of detection performed by the human sensor 26. The speaker 34 outputs a sound according to the state of detection performed by the human sensor 26 during the execution of the checking mode performed by the checking processing unit 38a.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to an alarm device and a control method thereof.

Background Art

[0002] Conventionally, an alarm device equipped with a human presence sensor has been proposed. Such an alarm device, for example, is configured to display by a display unit such as an LED (Light Emitting Diode) when a person's presence is detected, and not to display by the display unit when a person's presence is not detected (see, for example, Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the alarm devices described in Patent Documents 1 and 2 may be very difficult to see depending on the surrounding light environment (such as the surrounding being bright). In particular, the alarm device is usually installed at a position far from the eyes, such as at the feet, on the ceiling, or near it, and is very difficult to see.

[0005] The present invention has been made to solve such problems, and an object thereof is to provide an alarm device and a control method thereof that can more easily present the detection state by a human presence sensor.

Means for Solving the Problems

[0006] The alarm device according to the present invention comprises a sensor for detecting abnormalities in a monitoring area, a sound output unit that outputs a sound to indicate an abnormal state when an abnormality is detected in the monitoring area based on a signal from the sensor, a human presence sensor for detecting the presence of people in the surrounding area, and a confirmation processing unit that executes a confirmation mode to confirm the detection state by the human presence sensor, wherein the sound output unit outputs a sound corresponding to the detection state by the human presence sensor while the confirmation mode is being executed by the confirmation processing unit. The system outputs an alert sound corresponding to the detection state by the motion sensor, outputs a first alert sound of a first frequency when a person is detected based on the signal from the motion sensor, outputs a second alert sound of a second frequency different from the first frequency when a person is no longer detected based on the signal from the motion sensor, outputs the first alert sound of the first frequency for a first predetermined time at the timing when the motion sensor switches from a state where no person is detected to a state where a person is detected, outputs the second alert sound of the second frequency for a second predetermined time at the timing when the motion sensor switches from a state where a person is detected to a state where no person is detected, outputs an audio statement to that effect when the standby state of the motion sensor ends and the confirmation of the detection state by the motion sensor begins after the confirmation mode by the confirmation processing unit has started, outputs a third alert sound for a third predetermined time longer than the first and second predetermined times, or outputs a fourth alert sound of a third frequency different from the first and second frequencies at the end of the confirmation mode by the confirmation processing unit. .

[0007] Furthermore, the present invention relates to a method for manufacturing an alarm device, comprising a sensor for detecting an abnormality in a monitoring area, a sound output unit that outputs a sound to indicate an abnormal state when an abnormality is detected in the monitoring area based on a signal from the sensor, and a motion sensor for detecting the presence of a person in the surrounding area, wherein the method for controlling the alarm device includes a confirmation process step that executes a confirmation mode to confirm the detection state by the motion sensor, and in the confirmation process step, during the execution of the confirmation mode, a sound corresponding to the detection state by the motion sensor is output. , output an alert sound corresponding to the detection state by the motion sensor, output a first alert sound of a first frequency when a person is detected based on the signal from the motion sensor, output a second alert sound of a second frequency different from the first frequency when a person is no longer detected based on the signal from the motion sensor, output the first alert sound of the first frequency for a first predetermined time at the timing when the motion sensor switches from a state where no person is detected to a state where a person is detected, output the second alert sound of the second frequency for a second predetermined time at the timing when the motion sensor switches from a state where a person is detected to a state where no person is detected, output an audio statement to that effect when the standby state of the motion sensor ends and the confirmation of the detection state by the motion sensor begins after the start of the confirmation mode by the confirmation processing step, output a third alert sound for a third predetermined time longer than the first predetermined time and the second predetermined time, or output a fourth alert sound of a third frequency different from the first frequency and the second frequency at the end of the confirmation mode. . [Effects of the Invention]

[0008] According to the present invention, it is possible to provide an alarm device and a control method thereof that can more clearly display the detection status by a human presence sensor. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view showing the usage state of a gas alarm according to an embodiment of the present invention. [Figure 2] This is a perspective view showing how a gas alarm according to an embodiment of the present invention is installed. [Figure 3] This is a front view showing a gas alarm according to an embodiment of the present invention. [Figure 4] This is a side view showing a gas alarm according to an embodiment of the present invention. [Figure 5] Figures 1 to 4 are front views showing the gas alarm with the panel removed. [Figure 6] Figures 1 to 4 are front views showing the gas alarm with the cover and panel removed. [Figure 7] This block diagram shows the software configuration of the gas alarm shown in Figures 1 to 4. [Figure 8] Figures 1 to 7 are partially enlarged cross-sectional views showing the internal structure of the gas alarm. [Figure 9] This is a timing chart showing the operation of the gas alarm according to this embodiment. [Modes for carrying out the invention]

[0010] The present invention will be described below in accordance with preferred embodiments. It should be noted that the present invention is not limited to the embodiments shown below, and can be modified as appropriate without departing from the spirit of the invention. For example, in the embodiments shown below, a gas alarm is described as an example of an alarm, but it is not limited to a gas alarm; it may also be a fire alarm or a gas and fire integrated alarm capable of detecting and alarming both gas and fire. Furthermore, it may also be a security alarm that detects intruders, etc. Also, in the embodiments shown below, some components are not illustrated or described, but it goes without saying that the details of the omitted technologies are appropriately based on publicly known or well-known technologies, to the extent that they do not contradict the content described below.

[0011] Figure 1 is a perspective view showing the gas alarm in use according to an embodiment of the present invention, and Figure 2 is a perspective view showing how the gas alarm according to an embodiment of the present invention is installed. Figure 3 is a front view showing the gas alarm according to an embodiment of the present invention, and Figure 4 is a side view showing the gas alarm according to an embodiment of the present invention.

[0012] As shown in Figure 1, the gas alarm 1 according to this embodiment is a ceiling-mounted alarm that is attached to a rotating mounting part A provided on the ceiling. As shown in Figure 2, the gas alarm 1 has a structure that allows it to be attached to the rotating mounting part A by rotating it, similar to existing lighting devices.

[0013] As shown in Fig. 4, the gas alarm 1 has a contact C on the back surface on the ceiling side. The contact C is a metal member protruding to the back surface side. Also, as shown in Fig. 2, the rotary mounting portion A also has an electrical contact B. The electrical contact B is located at the bottom of the first groove G1 provided in the rotary mounting portion A. When the gas alarm 1 is attached to the rotary mounting portion A, the contact C on the gas alarm 1 side contacts the electrical contact B of the rotary mounting portion A. As a result, the power supply of the gas alarm 1 is turned on.

[0014] Furthermore, as shown in Fig. 4, in addition to the contact C, the gas alarm 1 includes a signal terminal (voltage - having contact) D on the back surface side. This signal terminal D is configured to fit into the second groove G2 shown in Fig. 2 in the attached state to the rotary mounting portion A, and functions to transmit a so - called voltage - having signal. The voltage - having signal becomes a 0V signal, for example, when the gas alarm 1 is removed from the rotary mounting portion A or at the time of disconnection, becomes a 6V signal when the gas alarm 1 is in a normal monitoring state, and becomes a 12V signal when the gas alarm 1 is in an alarm state. The voltage - having signal is transmitted to, for example, an alarm monitoring panel such as a management room of an apartment building.

[0015] Such a gas alarm 1 includes at least a housing 2 that houses a speaker 34, a gas sensor 24 (see Fig. 6 described later), etc. The housing 2 has a thin - type substantially cylindrical shape in appearance, and as shown in Figs. 3 and 4, has a housing main body 2a, a lid body 2b, and a panel 2c. The housing main body 2a is a member that constitutes the back surface side of the housing 2 and is a bottomed cylindrical member with an open front side. The lid body 2b covers the housing main body 2a from the front side (the lower side in the attached state to the rotary mounting portion A) which is the open side. The panel 2c is a plate material that fits into a recess D1 (see Fig. 5 described later) formed on the front side of the lid body 2b. The panel 2c is substantially circular in accordance with the shape of the housing 2.

[0016] Further, as shown in FIG. 4, the gas alarm 1 includes a push operation unit 10 on the side surface of the housing 2. The gas alarm 1 according to the present embodiment has a function of communicating with an external server OS (see FIG. 7 described later). The push operation unit 10 is an operation unit for performing communication settings so as to be communicatively connected to the external server OS. Further, the gas alarm 1 according to the present embodiment can perform an operation of checking the detection state of the human presence sensor 26 (see FIG. 6 described later). The push operation unit 10 is also an operation unit for causing an operation for checking the human presence sensor 26 to be performed.

[0017] Furthermore, as shown in FIG. 3, the gas alarm 1 includes a stop operation unit 12 on the front side. The stop operation unit 12 is an operation unit for stopping the alarm operation (sound output and light emission) when the gas alarm 1 is performing the alarm operation. This stop operation unit 12 is formed by a part (lower right part) of the panel 2c, and the concave portion D2 (see FIG. 5 described later) is provided in the lid body 2b so that it can be elastically deformed in the back direction. A warning stop switch 32 (see FIG. 6 described later) is provided on the back side of the stop operation unit 12.

[0018] Thus, the gas alarm 1 according to the present embodiment separately provides the push operation unit 10 and the stop operation unit 12. Here, if the push operation unit 10 and the stop operation unit 12 are formed as one operation unit, it is necessary to make the communication settings and the operation of checking the human presence sensor 26 different from the alarm stop operation, and each operation tends to become complicated. However, by providing them separately, the complication of the operation can be suppressed.

[0019] The gas alarm 1 also includes a first lens 14 and a second lens 16. The first lens 14 is a light transmissive member that is provided at the upper part of the front side of the gas alarm 1 and is circular when viewed from the front. A human presence sensor 26 (see FIG. 6 described later) is provided on the back side of the first lens 14. The second lens 16 is a light transmissive member that is provided at the upper part of the front side of the gas alarm 1 and is arc-shaped when viewed from the front. A light emitting unit 36 (see FIG. 6 described later) is provided on the back side of the second lens 16.

[0020] Furthermore, the gas alarm 1 has a speaker hole 18 and a gas hole 20 formed on its front side. The speaker hole 18 is an arc-shaped hole formed approximately to the right of the stop operation unit 12 when viewed from the front. A speaker 34 (see Figure 6 below) is provided on the back side of the speaker hole 18. The gas hole 20 is an arc-shaped hole formed on the lower left side of the gas alarm 1 when viewed from the front. A gas sensor 24 (see Figure 6 below) is provided on the back side of the gas hole 20. These speaker hole 18 and gas hole 20 allow sound from the speaker 34 and the target gas to pass through smoothly.

[0021] Figure 5 is a front view showing the gas alarm 1 shown in Figures 1 to 4 with panel 2c removed, and Figure 6 is a front view showing the gas alarm 1 shown in Figures 1 to 4 with cover 2b and panel 2c removed. Figure 7 is a block diagram showing the software configuration of the gas alarm 1 shown in Figures 1 to 4. For convenience, other components besides the gas alarm 1 are also shown in Figure 7.

[0022] As shown in Figure 6, the gas alarm 1 includes a control board 22 within the housing body 2a that extends horizontally when mounted on the rotating mounting part A. Also, as shown in Figures 5 to 7, the gas alarm 1 includes a gas sensor (sensor) 24, a human presence sensor 26, a communication module 28, a confirmation switch 30, an alarm stop switch 32, a speaker (sound output unit) 34, a light-emitting unit 36, a main microcontroller 38, an audio IC (Integrated Circuit) 40, and an external output unit 42.

[0023] The control board 22 shown in Figure 6 houses the main components of the gas alarm 1. The gas sensor 24 is used to detect abnormalities in the monitoring area. In this embodiment, the gas sensor 24 is a semiconductor gas sensor that reacts to target gases such as city gas and carbon monoxide, and outputs a signal corresponding to the concentration of the target gas to the main microcontroller 38 (see Figure 7). This gas sensor 24 is provided in correspondence with the notch 22a formed in the control board 22. The gas introduction portion 24a of the gas sensor 24 is installed so as to face the gas storage chamber GR formed in correspondence with the gas hole 20 (see Figure 3).

[0024] The human presence sensor 26 is used to detect the presence of people in the surrounding area and outputs a signal to the main microcontroller 38 (see Figure 7) corresponding to infrared radiation from a living organism, for example. The human presence sensor 26 is not limited to using infrared radiation; it may also be used, for example, to detect moving objects using ultrasound and determine that the moving object is a living organism.

[0025] The communication module 28 shown in Figures 6 and 7 communicates with an external server OS owned by a gas company or the like via a communication line. This communication module 28 communicates with the external server OS by wirelessly connecting to the in-house router R, for example, using the wireless communication standard Wi-Fi (registered trademark), enabling the sending and receiving of information with the external server OS.

[0026] The confirmation switch 30 shown in Figures 6 and 7 is an operation switch that starts a setting mode for executing communication settings by the main microcontroller 38, and turns on when the push operation unit 10 is pressed. In setting mode, the communication module 28 is wirelessly connected to the in-house router R and communicates with the external server OS. The confirmation switch 30 is also an operation switch that starts a confirmation mode for checking the detection status by the motion sensor 26. When the confirmation mode is executed, the main microcontroller 38 puts the motion sensor 26 into a standby state and then starts checking the detection status by the motion sensor 26.

[0027] In detail, when a predetermined operation is performed, the gas alarm 1 first starts a confirmation mode, and after the confirmation mode ends, it starts a setting mode. Here, the predetermined operation is, for example, when the gas alarm 1 is in a normal monitoring state and the push operation unit 10 (confirmation switch 30) is pressed and held for a first predetermined time (for example, 3 seconds). Alternatively, the predetermined operation may be when the power is turned on while the push operation unit 10 (confirmation switch 30) is pressed and the pressed state continues for the first predetermined time. In particular, in this embodiment, since the push operation unit 10 is provided on the side of the housing 2, the gas alarm 1 is configured to be easier to attach to the rotating mounting unit A while pressing the push operation unit 10, as shown in Figure 2, compared to the case where the push operation unit 10 is provided on the front side of the housing 2.

[0028] The alarm stop switch 32 shown in Figures 6 and 7 is located on the back of the stop operation unit 12 (see Figure 3) and is turned on via a first lever member L1 (see Figure 5) provided in the recess D2 (see Figure 5) of the cover 2b when the stop operation unit 12 is pushed toward the back. When the alarm stop switch 32 is turned on, it sends a signal to the main microcontroller 38 to that effect. When the main microcontroller 38 receives a signal indicating that the alarm stop switch 32 has been turned on while an alarm operation is in progress, it stops the alarm operation.

[0029] Speaker 34 outputs sound when the main microcontroller 38 detects an abnormal condition (high concentration abnormality of the target gas) in the monitoring area based on the signal from the gas sensor 24. In this case, speaker 34 outputs an alarm sound and an alarm voice (alarm message). These alarm voices and other messages are stored in voice IC 40.

[0030] The light-emitting section 36 shown in Figure 6 emits light to indicate various states of the gas alarm 1 and is composed of eight LEDs. These light-emitting sections 36 consist of a blue light-emitting section 36a that indicates the communication status, an orange light-emitting section 36b that indicates that an audio message or the like is being output (notification in progress), a yellow light-emitting section 36c that indicates an abnormal carbon monoxide concentration, a green light-emitting section 36d that indicates the power-on state, and a red light-emitting section 36e that indicates a gas leak in city gas. The light from these light-emitting sections 36 is output to the outside via a light guide plate (not shown) and a second lens 16 (see Figure 5).

[0031] The main microcontroller 38 shown in Figure 7 controls the entire gas alarm 1 and, in this embodiment, includes a confirmation processing unit 38a. The confirmation processing unit 38a executes a confirmation mode to confirm the detection status by the motion sensor 26. The external output unit 42 is an output unit for outputting a voltage signal, for example, via the signal terminal D (see Figure 4).

[0032] Figure 8 is a partially enlarged cross-sectional view showing the internal configuration of the gas alarm 1 shown in Figures 1 to 7. As shown in Figure 8, the gas alarm 1 is equipped with a second lever member L2 connected to the back side of the lid 2b. The second lever member L2 is a cantilevered member extending toward the control board 22, and its tip is interposed between the push operation part 10 and the confirmation switch 30. In particular, the second lever member L2 is positioned so as not to press the confirmation switch 30 when no external force is applied. Such a second lever member L2 provides a click sensation when the push operation part 10 is operated, and also prevents the push operation part 10 from remaining pressed (i.e., stuck down).

[0033] Next, an overview of the operation of the gas alarm 1 according to this embodiment will be described. Figure 9 is a timing chart showing the operation of the gas alarm 1 according to this embodiment.

[0034] First, assume that the press operation unit 10 (confirmation switch 30) is pressed at time t1, and the power is turned on at time t2. Then, at time t3, when the long press is confirmed after the first predetermined time has elapsed from time t2, the confirmation processing unit 38a starts confirmation mode. At this time, the main microcontroller 38 outputs a notification sound (for example, "beep") indicating the start of confirmation mode. The main microcontroller 38 also starts the blue light-emitting unit 36a and the green light-emitting unit 36d to blink.

[0035] Subsequently, at time t4, the motion sensor 26 enters a standby state. Then, at time t5, after a second predetermined time (for example, 30 seconds) has elapsed from time t4, the standby state ends and the motion sensor 26 begins checking the detection status. At this time, the main microcontroller 38 outputs an audio message from the speaker 34 indicating that the motion sensor 26 has begun checking the detection status. Specifically, the speaker 34 outputs the message, "Starting motion sensor check." Furthermore, the main microcontroller 38 turns off the blue light-emitting part 36a.

[0036] Subsequently, at time t6, suppose a user or other person enters the detection range of the human presence sensor 26. At this time, the main microcontroller 38 detects the person based on the signal from the human presence sensor 26 and outputs a first notification sound (for example, "beep") for a first predetermined time. The first notification sound is a sound of a first frequency that is audible to humans. The state in which a person is detected continues until time t7, but the first notification sound is not output continuously until time t7, but only during the period from when the system switches to the state in which a person is detected until the first predetermined time has elapsed. The main microcontroller 38 continues to illuminate the blue light-emitting part 36a while a person is continuously detected (between time t6 and time t7).

[0037] Next, let's assume that at time t7, the user or other person leaves the detection range of the motion sensor 26. At this time, the main microcontroller 38 recognizes that a person is no longer detected based on the signal from the motion sensor 26 and outputs a second notification sound (for example, "po") for a second predetermined time. The second notification sound is audible to people and is a sound with a second frequency different from the first frequency. The second predetermined time may be the same as or different from the first predetermined time. The state of no person being detected continues until time t8, but the second notification sound is not output continuously until time t8, but only during the period from when the system switches to a state of no person being detected until the second predetermined time has elapsed. The main microcontroller 38 keeps the blue light-emitting part 36a off while no person is detected (between time t7 and time t8).

[0038] Subsequently, let's assume that at time t8, a user or other person enters the detection range of the motion sensor 26. At this time, the same process as at time t6 is executed.

[0039] Next, let's assume that at time t9, the user or other person leaves the detection range of the motion sensor 26. At this time, the same process as at time t7 is executed.

[0040] Then, the confirmation mode ends at time t10, which is three predetermined times (for example, 3 minutes and 30 seconds) after time t5, when the confirmation of the detection state by the motion sensor 26 begins. At this time, the main microcontroller 38 changes the green light-emitting part 36d from a blinking state to an off state. Furthermore, the main microcontroller 38 outputs a notification sound from the speaker 34 to indicate the end of the confirmation mode. In the example shown in Figure 9, the speaker 34 outputs a third notification sound (for example, a "beep") that lasts for a third predetermined time that is longer than the first predetermined time and the second predetermined time. The speaker 34 may also output a fourth notification sound at the end of the confirmation mode, which has a third frequency different from the first and second frequencies.

[0041] Then, at time t11, when the output of the third or fourth alarm sound ends, the gas alarm 1 switches to a setting mode for communication settings.

[0042] In this way, according to the gas alarm 1 and its control method according to this embodiment, the speaker 34 outputs a sound corresponding to the detection state by the motion sensor 26 during the execution of the confirmation mode, thereby communicating the detection state through the hearing of the user, etc., and making it possible to present the detection state by the motion sensor 26 in a more understandable manner regardless of the surrounding light environment or the installation location of the gas alarm 1.

[0043] Furthermore, the system outputs an alert sound according to the detection state by the human presence sensor 26. For example, if the system frequently switches between a detected state and a state where a person is not detected, a voice message that takes several seconds from start to finish may not be able to handle it. However, by outputting an alert sound, the detection state can be clearly and accurately indicated even if the switching occurs frequently.

[0044] Furthermore, a first notification sound is emitted when a person is detected, and a second notification sound with a different frequency is emitted when no person is detected. Therefore, even when no person is detected, the notification sound can still be perceived, making the detection status even easier to understand.

[0045] Furthermore, when the system switches from a state where no person is detected to a state where a person is detected, a first notification sound of the first frequency is output for a first predetermined time, and when the system switches from a state where a person is detected to a state where no person is detected, a second notification sound of the second frequency is output for a second predetermined time. For this reason, for example, while a person is detected, the first notification sound is not output continuously, but only for the first predetermined time from the moment of the switch. The same applies to the second notification sound. This makes it possible to maintain an easy-to-understand indication of the detection status while reducing the possibility of causing discomfort to users due to continuous sound output.

[0046] Furthermore, after the start of the confirmation mode, when the standby state of the human presence sensor 26 ends and the confirmation of the detection state by the human presence sensor 26 begins, an audio output to that effect is given. At the end of the confirmation mode, a third notification sound is output for a third predetermined time that is longer than the first predetermined time and the second predetermined time, or a fourth notification sound with a third frequency different from the first and second frequencies is output. This makes it easy to understand whether the human presence sensor 26 has detected or not, and also clearly indicates the start and end of the confirmation of the detection state, providing the human presence sensor 26 with an overall easy-to-understand presentation regarding the confirmation.

[0047] Although the present invention has been described above based on embodiments, the present invention is not limited to the above embodiments, and modifications may be made without departing from the spirit of the invention, and other technologies may be combined as appropriate to the extent possible.

[0048] For example, although the gas alarm 1 according to this embodiment has been described as an alarm for city gas where the reducing gas to be detected is methane gas, it is not limited to this, and may also be an alarm for LP gas where the gas to be detected is propane gas or butane gas, etc. Furthermore, the gas alarm 1 may be configured as a gas fire alarm that also has a fire alarm function. In addition, the gas alarm 1 according to this embodiment is not limited to a ceiling-mounted type, but may also be a stationary alarm installed in other locations such as near the ceiling or on the wall at floor level.

[0049] Furthermore, while the gas alarm 1 according to this embodiment outputs an alarm sound corresponding to the detection state of the human presence sensor 26 during the execution of the confirmation mode, it is not limited to this, and may also output an audio sound corresponding to the detection state of the human presence sensor 26. [Explanation of symbols]

[0050] 1: Gas alarm (alarm) 2: Cabinet 2a: Main unit 2b: Lid 2c: Panel 10: Press operation section 12:Stop operation part 22: Control board 24: Gas sensor (sensor) 26: Motion sensor 28: Communication module 34: Speaker (sound output unit) 38: Main microcontroller 38a: Verification Processing Unit A: Rotating mounting part B: Electrical contact C: Contact D: Signal terminal L2: Second lever member

Claims

1. Sensors for detecting anomalies in the monitoring area, A sound output unit that outputs sound to indicate an abnormal state when an abnormality is detected in the monitoring area based on the signal from the aforementioned sensor, A motion sensor to detect the presence of people in the surrounding area, The system includes a confirmation processing unit that executes a confirmation mode for confirming the detection status by the aforementioned human presence sensor, The sound output unit, while the confirmation mode is being executed by the confirmation processing unit, outputs a sound corresponding to the detection state by the human presence sensor, outputs an alert sound corresponding to the detection state by the human presence sensor, outputs a first alert sound of a first frequency when a person is detected based on the signal from the human presence sensor, outputs a second alert sound of a second frequency different from the first frequency when a person is no longer detected based on the signal from the human presence sensor, and outputs the first alert sound of the first frequency for a first predetermined time at the timing when the human presence sensor switches from a state where no person is detected to a state where a person is detected. The system outputs a second notification sound of the second frequency for a second predetermined time at the timing when the system switches from a state in which a person is detected to a state in which no person is detected by the motion sensor. After the confirmation mode by the confirmation processing unit starts, when the standby state of the motion sensor ends and the confirmation of the detection state by the motion sensor begins, the system outputs an audio message to that effect. At the end of the confirmation mode by the confirmation processing unit, the system outputs a third notification sound for a third predetermined time that is longer than the first predetermined time and the second predetermined time, or outputs a fourth notification sound with a third frequency different from the first frequency and the second frequency. A warning device characterized by the following features.

2. A control method for an alarm device comprising: a sensor for detecting anomalies in a monitoring area; an audio output unit that outputs an abnormal state as sound when an abnormality is detected in the monitoring area based on a signal from the sensor; and a motion sensor for detecting the presence of people in the surrounding area, The system includes a confirmation process step that executes a confirmation mode to confirm the detection status by the aforementioned human presence sensor, In the verification process, while the verification mode is being executed, a sound corresponding to the detection state by the motion sensor is output, an alert sound corresponding to the detection state by the motion sensor is output, a first alert sound of a first frequency is output when a person is detected based on the signal from the motion sensor, a second alert sound of a second frequency different from the first frequency is output when a person is no longer detected based on the signal from the motion sensor, and the first alert sound of the first frequency is output for a first predetermined time at the timing when the motion sensor switches from a state where no person is detected to a state where a person is detected. The system outputs a second notification sound of the second frequency for a second predetermined time at the timing when the system switches from a state in which a person is detected to a state in which no person is detected by the motion sensor; after the start of the confirmation mode by the confirmation process, when the standby state of the motion sensor ends and confirmation of the detection state by the motion sensor begins, an audio output to that effect is made; at the end of the confirmation mode, the system outputs a third notification sound for a third predetermined time that is longer than the first predetermined time and the second predetermined time, or outputs a fourth notification sound with a third frequency different from the first frequency and the second frequency. A method for controlling an alarm device, characterized by the features described above.

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