JP2504968B2 - Guidance sound device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a guiding sound device for guiding evacuation by a warning sound or voice when a disaster occurs.

(Background Art) In order to safely guide a person to the outside of a building when a disaster such as a fire occurs, a guide device using a guide light, an alarm sound generator, a voice synthesizer, or the like is widely used. In particular,
Guidance using an alarm sound or voice is considered to be an effective guidance means for people who are blind or have poor visibility due to smoke. These guide lights and guide sound devices are installed near the exit of a building, but usually there are multiple exits in a building, and these guide lights and guide sound devices are installed in each of them, and multiple guide devices are installed. Evacuation guidance will be given all at once. In this case, prompt guidance to the nearest exit is one of the important issues, especially in a large building.

On the other hand, these induction devices have a built-in battery power supply as an emergency power supply so that they can operate for a specified time or longer even when a power failure occurs. Therefore, during the operation by the emergency power source, the battery voltage decreases with the passage of time, and the light output and the volume which are the outputs of the induction device decrease. For this reason, when multiple induction devices start operating at the same time, the output volume may vary due to variations in battery voltage and performance degradation even with the same type of induction device. It feels close even if it is far away, and if the volume is low, it feels far away even if the installation location is near, which may lead to misleading.

(Object of the Invention) The present invention has been made in view of the above points, and an object of the present invention is to make it possible to correctly recognize a sense of distance by the magnitude of the guide sound, and to guide to a close place. An object is to provide a guidance sound device that enables quick evacuation.

DISCLOSURE OF THE INVENTION The guide sound device according to the present invention is a guide sound device for guiding evacuation by an alarm sound or a voice, and is provided with a device for making the output volume constant with respect to the fluctuation of the power supply voltage. .

Regarding the configuration of the induction device for keeping the output constant against the fluctuation of the battery voltage, JP-A-55-57297 discloses an example in which the light output is constant. However, the goal is to effectively utilize the limited capacity of the battery by keeping the light output constant. That is, in the case of using the battery having the discharge characteristic as shown in FIG. 5, the discharge reference voltage Vs corresponding to the light output that must be ensured at the minimum and the effective lighting time t ₀ that must be operated are related laws and regulations. Although it is specified, when the battery voltage V _B that exceeds the discharge reference voltage Vs is input, the base current of the output control transistor is decreased to limit the output, and the output is limited by that amount (hatched portion in FIG. 5). The electric power is saved, the battery capacity is reduced, or the effective lighting time is extended.

On the other hand, the present invention is a completely different invention because it aims at making the output volume constant and correctly recognizing the sense of distance. In the case of a light guide device, it is considered that in order for a person to recognize the distance to multiple guide lights, it is judged by the size of the apparent light source rather than the light intensity. Is considered to be determined by the volume of the sound.

FIG. 6 is an explanatory diagram for explaining how to perceive the sense of distance by the guide sound. As shown in FIG. 6, when _two loudspeakers SP ₁ and SP ₂ of the guide sound device are installed at distant places, the loudness of a person feels is inversely proportional to the square of the distance l, If the sound pressure fluctuates due to the fluctuation of the battery voltage as in the past, due to the fluctuation of the battery voltage,
Even though the distance is l ₁ <l ₂ , the sound pressure P of the speaker SP ₂ is
₂ is higher than the sound pressure P ₁ of the speaker SP _1, misjudged the side of the speaker SP ₂ are close, sometimes be induced to farther. However, in the case of the present invention, since the output sound pressures P ₁ and P ₂ are constant with respect to the fluctuation of the battery voltage, P ₁ ≈P ₂ (= P)
Therefore, the sound pressure felt by the person becomes P / l ₁ ² > P / l ₂ ² (l ₁ <l ₂ ), and is guided to the closer speaker SP ₁ .

It should be noted that visibility is poor in smoke from a fire, and grasping the sense of distance by guided light may be inaccurate because the object cannot be seen, but the guided sound can propagate regardless of the presence or absence of smoke. Therefore, in the guide sound device of the present invention, smoke does not cause a difference in grasping the sense of distance.

Further, in the case of induction by sound, unless the output volume is constant, the output becomes excessively high in the initial stage of operation, which may cause fear more than necessary and cause confusion such as panic. However, in the present invention, since the output is not excessively high than necessary, the inconvenience in this respect can be prevented.

 Examples of the present invention will be described below.

Embodiment 1 FIG. 1 is a block diagram showing a basic configuration of a guiding sound device according to an embodiment of the present invention, and FIG. 2 is a specific circuit diagram thereof. In this embodiment, a constant voltage section A ₅ is provided between the switch S ₁ operated by the battery power source B and the fire alarm signal F and the voice synthesis section A ₂ . The fire alarm signal F is created by the series circuit of the power source F ₁ and the transfer terminal F _2, and the transfer terminal F ₂ is closed under normal conditions, and the transfer terminal F ₂ is opened during a fire. There is. S ₂ is an inspection switch that is turned off only during inspection. Therefore, in the normal state, the relay RY ₀ in the fire alarm signal receiving section A ₁ is excited, and the switch S ₁ consisting of its contact is shown.
Switching to NO side. In this state, the battery power source B
Is a rectifier Re
The voltage rectified in c is supplied through the resistor r and charged. As the battery power source B, a rechargeable battery such as a Ni-Cd battery is used.

When the transfer terminal F ₂ is opened in the event of a fire, or when the inspection switch S ₂ is opened during inspection, the relay RY ₀ in the fire alarm signal receiver A ₁ is de-energized, and the switch consisting of its contacts is released. S ₁ is switched to the NC side, and power is supplied from the battery power source B to the voice synthesizing unit A ₂ via the constant voltage unit A ₅ .
The guidance voice generated in the voice synthesis unit A ₂ is amplified by the amplification unit A ₃ and output to the speaker SP. Here, the constant voltage unit A ₅ performs a well-known constant voltage operation by the Zener diode ZD, the resistors R ₁ and R ₂ , the power transistor Q _{1 and the} like, and the output voltage V ₀ thereof is the voice synthesis unit A ₂ and Speaker at amplifier A ₃
Battery voltage V _B
Is a constant voltage.

Embodiment 2 FIG. 3 is a block diagram showing the basic configuration of another embodiment of the present invention, and FIG. 4 is a concrete circuit diagram thereof. In the present embodiment, elements having the same functions as those in the previous embodiment are designated by the same reference numerals, and redundant description will be omitted. In the present embodiment, the level of voice output is detected by the output detection unit A ₇ , and the detected output is fed back to the gain adjustment unit A ₆ , so that the size of the voice output of the amplification unit A ₃ becomes constant. The gain is adjusted.

When the transfer terminal F ₂ is opened in the event of a fire, or when the inspection switch S ₂ is opened during inspection, the relay RY ₀ in the fire alarm signal receiver A ₁ is de-energized, and the switch consisting of its contacts is released. S ₁ is switched to NC state, the battery power source B is supplied to the speech synthesis unit a _2, induction speech generated by the speech synthesis section a ₂ is amplified by the amplifying unit a _3, it is outputted to the speaker SP However, the output voltage V ₁ of the amplifier A ₃ is applied to the parallel circuit of the capacitor C ₁ and the resistor R ₄ via the diode D ₁ and smoothed, and the charging voltage V ₂ of the capacitor C ₁ is set to the zener. Light emitting part LD of photocoupler PC via diode ZD ₁ and resistor R _3.
Is being applied to. Also, the light receiving part PT of the photocoupler PC is
It is connected to the input section of the amplification section A ₃ via a resistor R ₅ . Here, to output the sound of constant output, and set the voltage V ₂ of the input voltage V ₃ and the output portion of the amplifying portion A _3. That is,
In that state, the photocoupler PC is in a linear operation region. Therefore, when the battery voltage is high and the voltages V ₁ and V _{2 at} the output of the amplifier A ₃ are high (when sound above a certain level is output), the current flowing into the light emitting part LD of the photocoupler PC is by increasing lowers the impedance of the light receiving portion PT of the photocoupler PC, it falls input voltage V ₃ of the amplifier a _3. As a result, the gain of the amplification unit A ₃ is lowered until the voice output becomes a constant set output, and the voice output can be kept constant until the effective discharge region (effective discharge voltage) of the battery power source B. . The Zener diode ZD ₁ is set so that the required constant audio output can be obtained at the effective discharge voltage of the battery power source B.

(Effects of the Invention) As described above, in the present invention, the guidance sound device for guiding the evacuation by the warning sound or the voice is provided with the device for making the output sound constant against the fluctuation of the power supply voltage. Therefore, even if there are multiple guidance sound devices installed, you can recognize the sense of distance correctly, and if you evacuate to the direction where the guidance sound is loud, you will be guided to a nearby exit, so you can safely guide There is.

Moreover, since the output volume is set to a constant output, excessive output does not cause fear more than necessary and cause a panic state.

Since the output volume is constant, the amplifier and speaker do not have excessive input, and the sound quality is good.
Further, since it is not necessary to use one having a capacity larger than necessary, the cost is low.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of an embodiment of the present invention, FIG. 2 is a detailed circuit diagram of the same as above, FIG. 3 is a block circuit diagram of another embodiment of the present invention, and FIG. FIG. 5 is a diagram showing the battery discharge characteristics of the conventional example, and FIG. 6 is an operation explanatory diagram of the present invention. A is a guide sound device, A ₂ is a voice synthesis unit, A ₅ is a constant voltage unit, B is a battery power source, and SP is a speaker.

Claims (1)

(57) [Claims] 1. An induction sound device for guiding evacuation by an alarm sound or a voice, comprising a device for making an output volume constant with respect to a fluctuation of a power supply voltage.