JPS63127123A - Alarm timepiece equipped with human body sensor - Google Patents

Abstract

PURPOSE:To generate alarm sound only when a person exists near and to control sound volume corresponding to the distance up to a human body, by providing an alarm apparatus and a sensor detecting the presence of the human body. CONSTITUTION:When alarm time arrives in such a state that a sound stopping switch 3 is opened and an alarm switch 1 is closed, the outputs Q, Q of a flip- flop circuit 2 are respectively reversed to '1' and '0'. Therefore, one pulse is generated from a one shot circuit 8 and a human body sensor 18 becomes an operation state. Hereupon, when a person exists near, detection output is generated from the sensor 18 and the output level thereof is judged by a judge circuit 19. When said output level exceeds the min. limit reference level, output is generated from a terminal (a) and one pulse is generated from an one shot circuit 11 and an alarm signal is generated from an alarm circuit 20. The sound volume indication output 22 corresponding to the output level (the distance up to the human body) of the sensor 18 is issued from the terminal (b) of a judge circuit 19.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an alarm clock with a human body sensor.

[Prior Art] A conventional alarm clock is configured to automatically generate an alarm sound at a set time, whether or not someone is present.

[Problems to be Solved by the Invention] With the above-mentioned alarm, the alarm sounds at the set time even if no one is nearby, which disturbs the neighbors and wastes electricity. there were.

Also, whether a person was close to the clock or far away, the clock would always ring at a set volume, which sometimes made it too loud or difficult to hear.

According to the present invention, an alarm sound is generated only when a person is nearby, and the volume is controlled depending on the distance to the human body.

[Means for Solving the Problems] The present invention includes a sounding device that generates an alarm sound when an output is generated from an alarm device at an alarm time and a human body is detected by a human body sensor. The volume of the alarm sound is controlled by determining the distance to the human body based on the output of the sensor.

[Embodiment] In the drawings, 1 is an alarm switch, 2 is a flip-flop circuit, and these constitute an alarm device. 3 is a stop switch, 4 is a 1 minute timer, 5 is 15
6 and 7 are flip-flop circuits, 8 to 11 are one-shot circuits, and 12 to 16 are gate circuits. 1
Reference numeral 7 denotes a delay circuit, and 18 a human body sensor, which includes an infrared sensor and the like, and detects a human body within a certain range. 19
is a determination circuit that determines the distance to the human body based on the output level from the human body sensor 18. 2o is an alarm circuit that generates an alarm signal, 21 is an amplifier, and 22 is a sounding device.

Next, the operation will be explained. When the alarm switch 1 is closed at the alarm time with the ring stop switch 3 open, the outputs Q and Q of the flip-flop circuit 2 are inverted to "1" and "θ", respectively. Therefore, one pulse is generated from the one-shot circuit 8, and the human body sensor 18 becomes operational.

If there is a person nearby, the human body sensor 18 generates a detection output, and the determination circuit 19 determines the output level. If this output level exceeds the minimum reference level, an output is generated from terminal a and one-shot circuit 1
1 to 1 pulse is generated and an alarm signal is generated from the alarm circuit 20. On the other hand, a volume designation output corresponding to the output level of the human body sensor 18 (distance to the human body) is generated from the terminal of the determination circuit 19. Therefore, the sound generating device 22 generates an alarm sound with a volume corresponding to the distance to the human body.

That is, if the person is far away, the alarm sound will be generated at a high volume, and if the person is close, the alarm sound will be generated at a low volume, making it possible to wake up reliably and refreshed.

The pulse from the one-shot circuit 8 when the alarm switch 1 is closed is supplied to the alarm circuit 20 via the gate circuit 16 to generate a short-time alarm sound. This means that if there is a person outside the sensing range of the human body sensor 18, for example next to or behind the clock, it will be determined that there is no one and the alarm will not sound, as described below. It generates a short alarm sound to call attention.

By the way, if there is no person nearby when the alarm switch 1 is activated, no output is generated from the determination circuit 19, so no alarm sound is generated. At this time, the reset of the timers 4 and 5 is canceled by the output page of the flip-flop circuit 2, and each of them starts a time counting operation. When one minute has passed, an output is generated from timer 4, and one-shot circuit 9
A pulse is generated and the human body sensor 18 becomes operational again. That is, if there is no person nearby, the human body sensor 18 is activated every minute for 15 minutes until the timer 5 generates an output to detect a human body. If a human body is detected by this detection operation,
In the same manner as described above, an alarm sound is generated, the flip-flop circuit 6 is set by the output from the terminal a of the determination circuit 19, and the timer 4 is reset.

Note that if no human body is detected for 15 minutes, the flip-flop circuit 7 is set by the output from the timer 5, an output is generated from the gate circuit 15, and one pulse is generated from the one-shot circuit 10. When this happens, an alarm sounds to alert you. On the other hand, the output from the timer 5 is slightly delayed by the delay circuit 17 and resets the flip-flop circuits 2.6.7 to return to the initial state.

In order to stop the alarm sound, the sound stop switch 3 is closed and the flip-flop circuits 2, 6.7 are reset.

By the way, when an alarm circuit having a well-known function of increasing the volume in stages as the ringing time elapses is used, the volume control by the determination circuit 19 is as follows:
The stage at which the sound begins may be selected depending on the distance to the human body. In other words, if the person is nearby, the sound will start from the first stage of the lowest volume, if the person is a little further away, the sound will start from the second stage, and if the person is further away, the sound will start from the third stage. It is something to do.

[Effects of the Invention] According to the present invention, since the alarm sound is generated only when a human body is detected, it is possible to eliminate the inconvenience of emitting the alarm sound even when no one is present, and to avoid causing trouble to the surrounding people. This also eliminates unnecessary current consumption.

Furthermore, by controlling the volume of the alarm sound according to the distance to the human body, it is possible to wake up reliably and refreshed.

[Brief explanation of the drawing]

The drawing is a logic circuit diagram showing an embodiment of the present invention. 1.2...Alarm device 18...Human body sensor 19...judgment circuit 22...Sounding device that's all

Claims (2)

[Claims] (1) An alarm device that generates an output at the alarm time;
An alarm clock with a human body sensor, comprising a human body sensor that detects the presence of a human body within a certain range, and a sounding device that generates an alarm sound when an output is generated from the alarm device and a human body is detected by the human body sensor. . (2) an alarm device that generates an output at the alarm time;
a human body sensor that detects the presence of a human body within a certain range; a sounding device that generates an output from the alarm device and generates an alarm sound when a human body is detected by the human body sensor; An alarm clock with a human body sensor comprising a determination circuit that determines the distance to a receiving human body and controls the volume of the alarm sound.