JPS6043993A - Switching device by sound - Google Patents

Abstract

PURPOSE:To prevent a switch from turning on when it is unnecessary, and from turning off when it is necessary, by expanding automatically sound detecting range of a sound detecting means, in a state that the switch by sound is on. CONSTITUTION:In case an action sound of a man, etc. is generated, its sound is detected by a microphone 1. The sound detected by the microphone 1 is amplified by an amplifier 2, and operates a timer 3. By an output of this timer 3, a switch S is turned on, and a lamp L is lighted. Also, the output of the timer 3 increases an amplification factor of the amplifier 2 through a controlling circuit 4. When the switch S is off (when there is no output of the timer 3), the amplification factor is small, therefore, no noise is picked up. Also, when the switch S is on (when there is an output of the timer 3), the amplification factor is large, a small sound is also detected, and the lamp L is lighted continuously.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a sound switching device for electrical equipment such as lighting equipment.

[Background technology]

FIG. 1 shows a conventional example in which a sound switching device is applied to a lighting fixture, which is an example of electrical equipment. Its operation is as follows. Sound is detected by microphone 1, and amplifier 2
and input it to timer 3. The timer 3 outputs a signal in response to an input signal, and continues to output for a certain period of time even if the input signal disappears.When a signal is input again during output, the timer time is initialized.

Then, the output of the timer 3 controls on/off the switch S for turning on and off the lighting equipment.

For example, if people are walking, working, or doing other activities that make noise, the lighting will continue to turn on, and will turn off after a while when no one is around and the lighting is no longer needed.

Although it is convenient, it also has the following drawbacks. In other words, if the sound detection sensitivity is too high, it may turn on when unnecessary, such as due to small external sounds. If the sensitivity is made dull, it becomes difficult to turn on automatically when necessary, and the disadvantage is that even after turning on, it will turn off immediately unless loud sounds are generated one after another.

[Object of the Invention] In view of the above-mentioned drawbacks of the conventional art, it is an object of the present invention to provide a sound switching device that has excellent operational performance and is easy to use.

[Disclosure of the invention]

The sound switching device of the present invention includes a switch inserted into an electric circuit of an electrical device such as a lighting device, a means for detecting sound, a means for switching the switch based on detection or non-detection of the sound, and a switch for detecting the sound. and means for automatically expanding the sound detection range by the sound detection means when the sound detection means is turned on.

According to this configuration, the sound detection range is initially narrow in a state where there is no sound, and small sounds from the outside are not detected. In this state, if there is a sound above a predetermined level, such as the sound of people walking, working, or generated noise, it will be detected and the switch will turn on, causing the electrical equipment to operate (e.g., a lighting fixture turns on). , the sound detection range is automatically expanded, so even if you don't make loud noises one after another, the sound of people walking, working, talking, etc. can be heard to a normal level, and the operation of electrical equipment can be easily detected. Continued.

A first embodiment of the present invention will be described with reference to FIGS. 2 to 4.

FIG. 2 is a block diagram, in which the illuminators J:i:L are turned on by the output of the timer 3, and at the same time, "!" is sent to 11゛ηI via the control circuit 4 to increase the amplification factor of the amplifier 2.
It's J-eshi.

FIG. 3 shows an electric circuit embodying the configuration of FIG. 2. 1
C1 is a microphone, and C1 is a capacitor for cutting a DC component, which together with a resistor R and an operational amplifier OP1 outside R constitute an amplifier circuit. The diode 1" D9 capacitor C2° resistor R3 constitutes an IR detection circuit for detecting the amplified AC sound signal and converting it into a current. The operational amplifier OP2 and the resistors R4 to R6 are It composes a voltage comparison circuit (comparator) that compares the level of No. d with the threshold level (detection-12 level V) and outputs a high-level signal when the signal exceeds the reference level.Diode D2 A timer circuit is constructed by ゜capacitor C3, resistor I<, /, operational amplifier OP3, and resistor R8゜Ro.The light emitting diode 5 of the photocoupler PC is connected to the resistor R. The phototriac 6 is inserted into the power supply circuit of the lighting equipment.Operation amplifier B
The output (fill) of OP3 is feedback-connected to the connection point between resistor R4 and resistor R5 of the negative input terminal of operational amplifier OP2 via resistor R6.

At first, there was no sound, but then there was a sound above a certain level, which was picked up by microphone 1 and turned on to the operational amplifier OP.
When the positive input terminal voltage of 2 increases, the operational amplifier OP
Output from 2. This charges the capacitor C3, and as a result of the negative input terminal of the operational amplifier OP3 being exposed to external pressure, its output is switched from high level to low level. This causes the light emitting diode 5 to conduct and emit light, so that the photo switch 6 conducts and the lighting fixture lights up.

Thereafter, if the sound level continues to be low or very low, there is no output from the operational amplifier OP2, so that the capacitor C3 is gradually discharged via the resistor R7. Operational amplifier OP3
When the negative input terminal voltage of the amplifier becomes lower than the reference level of the positive input terminal, the output of the operational amplifier OP3 returns to the high level, and as a result, the lighting fixture turns off. When the sound enters again at AiJ, where the discharge of the capacitor C3 becomes below the constant II (AiJ), the capacitor C3 is charged again, so the timer is initialized and the illuminator 1112 continues to be lit.

And 1. When it is in 'Xj lamp shape, operational amplifier oP
Since the output level I of 3 is low, which lowers the negative input terminal voltage (that is, the threshold voltage) of the operational amplifier OP2 through the resistor R6, the sound detection fiii
The area will be expanded. Even relatively low-pitched sounds can be detected.

s 4 l\1 shows the voltage changes at points a and b during the first trip in Figure 3, and the changes in the lighting and lighting conditions of the lighting equipment.

When there is no sound or there is no sound, the threshold level at point b is high. If there is a loud sound P□ in this state, the light will turn on as noted in n1J and the b15 level will drop. Therefore, the low b-level sound P21P3. which was not detected before then. P4 etc. were also detected,
The light continues. After the sound P4, a state in which there is no sound higher than the level of point b becomes μ<+() than the timer time T, and the 5th point level returns to the high level as the light goes out.

A second embodiment of the invention will be explained based on FIG.

7 is a speech recognition circuit that detects the quantity of characteristic parameters of a sound, such as frequency distribution and their temporal changes, and outputs an output when the amount of each parameter of a predetermined sound matches a certain amount or more; be.

When there is no output from timer 3' and the illumination is off, the selector switch S2 is set to the voice recognition circuit 7 side, and conversely, when the illumination is on, the amplifier 2 and timer 3 are directly connected without going through the voice recognition circuit 7. A Hyper 2 circuit 8 is provided. 91-j:
This is a control circuit that switches the switch S2.

According to this method, when the lamp is turned on for the first time, it only responds to a special sound, such as the word "turn on," and after the lamp is turned on, the timer 3 is initialized in response to any sound caused by human activity. Then, when no one is around and it is quiet, the lights go out after a short delay due to timer 3.

As an improvement to the one shown in FIG. 2, a timer 10 may be added as shown in FIG. 6 to expand the sound detection range for a certain period of time.

The 71st line 1 shows a concrete electric circuit of yet another example. This does not use the output of a timer to switch the sound detection range wide and narrow as in the previous example of υ, but rather uses a trigger (operational amplifier GP4) to create the initial trigger and a re-trigger (operational amplifier GP4) to continue the output. oP5) and [2], it is connected to the light emitting diode 5 via the Flinoff flop 11 and connected to the Flinoff flop 11.
As the reset input of the flop 11, the capacitor C,...
A timer 1 circuit consisting of a resistor R is constructed with 17II+,
A reverse bias diode D3 is connected to the output side of the operational amplifier oP50, and its positive terminal is connected to the negative input terminal of the operational amplifier OP through a resistor R.

The operation in this case is similar to that in Figure 3, and in Figure 4)
It works like statement 1.

Note that the present invention includes a switch in which the switch is not limited to turning on and off, but also switches the amount of light on and off, such as turning on and dimming.

〔Effect of the invention〕

According to the sound switching device of the present invention, it is possible to prevent small sounds from the outside from being erroneously detected (i.e., when there is a presence of a person, vocalization, etc., it is detected only when it is necessary). The device can be operated, and once such a sound is detected, the detection range can be automatically expanded to ensure that the device continues to operate; in other words, it can improve operating performance. This has the effect of improving usability.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional example, and Fig. 2 is a block diagram of a conventional example.
Fig. 3 is a detailed electrical circuit diagram, Fig. 4 is a time chart for explanation by vJ, Fig. 5 is a Glock diagram of the second embodiment, Fig. 6 is a detailed electric circuit diagram, The figure is a block diagram of another embodiment, and FIG. 7 is an electric circuit diagram of still another embodiment. 4...Control circuit (sound detection range expansion means), 6...Phototriac (switch), L...Lighting equipment (electronic Fig. 41 Fig. 5!1 Fig. 6 Fig. 7)

Claims (1)

[Scope of Claims] (1) A switch inserted into one electricity path of an electrical device, means for detecting sound, means for turning off the switch by detecting or not detecting the sound, and a switch for detecting sound. and means for automatically expanding the sieve detection range by the sound detection means when the sound detection means is turned on. (2) The 'electrical device is a lighting fixture, and the switch turns on and off the lighting fixture.''
Range of M+'i search The sound switching device described in item (1) 1. '1. . (31[ift',]L electric lighting equipment, wherein the switch turns on or dims the lighting equipment, the sound switching device i'e according to claim (1)) (4) The switching means for the switch includes a comparator, and the sound detection range expanding means changes the threshold level of the comparator (Claim 11, Paragraph 9). Section 2) or Section (3)
Sound switching device as described in ). (51) A patent in which the switching means of the switch includes a voice recognition circuit and its bypass circuit, and the means for expanding the sound detection range switches from the voice recognition circuit operating state to the bypass circuit operating state A sound switching device according to claim (1), (2) or (3).