A DC48V voice report evacuation indicator circuit

Abstract

This utility model discloses a DC48V voice-reporting evacuation indicator circuit, relating to the field of power electronics technology. It includes a power supply module, a voltage regulator module, and a voice indicator module. The power supply module is electrically connected to the voice indicator module via the voltage regulator module, and the voltage regulator module is electrically connected to the evacuation indicator. The voice indicator module includes an operational amplifier and a buzzer. In this invention, the power supply module is connected to mains power, undergoes voltage reduction processing, and outputs a stable operating voltage. The voltage regulator module then regulates and amplifies the operating voltage to provide a stable 48V power supply to both the voice indicator module and the evacuation indicator. The voice indicator module outputs voice prompts to provide voice reports to pedestrians in the vicinity, while the evacuation indicator provides illumination.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, specifically to a DC48V voice report evacuation indicator circuit. Background Technology

[0002] Fire emergency evacuation signs are crucial fire safety facilities for ensuring the safe and rapid evacuation of the public during a fire. When a fire breaks out, normal lighting power is interrupted. It is essential to ensure that evacuation lighting and signage are activated synchronously, maintaining an illuminance of at least 0.5 lx in general areas and at least 1 lx in densely populated areas and vertical stairwells. In addition to providing evacuation illumination, clear signage is necessary to guide the public quickly to exits. Under adequate evacuation illumination, these signs must effectively assist the public, regardless of whether there is smoke or not. In situations with dense smoke, they must quickly attract the visual attention of evacuees, promptly identify evacuation directions and locations, guide the public's evacuation, and prevent injuries or fatalities, ensuring the rapid and safe evacuation of panicked individuals.

[0003] Therefore, the existing evacuation indicator lights also have a voice reporting function. However, both the evacuation indicator lights and the voice buzzer are powered by two independent power supplies, which requires two sets of power supply circuits and increases costs.

[0004] In summary, a DC48V voice reporting evacuation indicator circuit was designed. Utility Model Content

[0005] To overcome the above-mentioned shortcomings, this utility model provides a DC48V voice report evacuation indicator circuit.

[0006] This utility model achieves the above objectives through the following technical solutions: A DC48V voice report evacuation indicator circuit includes a power supply module, a voltage regulator module, and a voice indicator module. The power supply module is electrically connected to the voice indicator module through the voltage regulator module, and the voltage regulator module is electrically connected to the evacuation indicator. The voice instruction module includes an operational amplifier and a buzzer. The output terminal of the power supply regulator of the operational amplifier is connected to the output terminal of the external control module through a sixth capacitor. The inverting input terminal of the operational amplifier is grounded through a first resistor. The output terminal of the operational amplifier is grounded through a buzzer. The voltage regulator module includes a Zener transistor and a transistor. The input terminal of the Zener transistor is electrically connected to the output terminal of the power supply module and the collector of the transistor, respectively. The output terminal of the Zener transistor is electrically connected to the power supply terminal of the operational amplifier. The output terminal of the Zener transistor is electrically connected to the emitter of the transistor. The base of the transistor is electrically connected to the ground terminal of the Zener transistor.

[0007] Preferably, the voice indication module further includes a second resistor, a third resistor, a fourth resistor, a fifth resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a first diode, and a second diode. The non-inverting input terminal of the operational amplifier is grounded through the second resistor and the seventh capacitor. The non-inverting input terminal of the operational amplifier is electrically connected to the output terminal of the operational amplifier through the third resistor and the eighth capacitor. The fourth resistor is connected in parallel with the third resistor and the eighth capacitor. The output terminal of the operational amplifier is electrically connected to the cathode of the second diode. The anode of the second diode is grounded through the ninth capacitor and the tenth capacitor.

[0008] Preferably, the output terminal of the operational amplifier is grounded through a fifth resistor and an eleventh capacitor. The fifth resistor and the eleventh capacitor form an RC series filter circuit, which can filter the output signal of the operational amplifier.

[0009] Preferably, the input terminals of the Zener transistor are grounded through the twelfth and thirteenth capacitors, and the output terminals are grounded through the fourteenth and fifteenth capacitors. The transistor can act as a current amplifier. When the buzzer is working, the Zener transistor is simultaneously turned on. When the transistor is connected, the voice indication module increases its output power to ensure the reliable operation of the buzzer.

[0010] Preferably, the power supply module includes a rectifier bridge and a Zener diode. The positive terminal of the output side of the rectifier bridge is grounded through a fifth capacitor and the Zener diode, respectively. The output side of the rectifier bridge is electrically connected to the input terminal of the Zener transistor. A common-mode inductor is electrically connected to the input side of the rectifier bridge. The Zener diode can limit the output voltage of the rectifier bridge, reduce the voltage surge to the subsequent voltage regulation module, and play a protective role.

[0011] Preferably, the input side of the common-mode inductor is connected in parallel with the sixth resistor and the first capacitor, the output side of the common-mode inductor is connected in parallel with the second capacitor, and the two ends of the output side of the common-mode inductor are grounded through the third capacitor and the fourth capacitor, respectively. The sixth resistor and the first capacitor form an RC filter circuit, and the third capacitor and the fourth capacitor form an X capacitor, which can filter noise in the mains power.

[0012] The beneficial effects of this utility model are as follows: In the DC48V voice report evacuation indicator circuit, the power supply module is connected to the mains power, and the voltage is stepped down to output a stable working voltage. Then, the working voltage is stabilized and the current is amplified by the voltage regulator module to provide a stable 48V power supply to the voice indicator module and the evacuation indicator. The voice indicator module outputs voice prompts to provide voice reports to pedestrians in the surrounding area, and the evacuation indicator provides lighting. Attached Figure Description

[0013] This utility model will be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is the power supply circuit diagram of this utility model. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0015] like Figure 1 As shown, a DC48V voice-reporting evacuation indicator circuit includes a power supply module A, a voltage regulator module B, and a voice indicator module C. The power supply module A is electrically connected to the voice indicator module C through the voltage regulator module B. The voice indicator module C includes an operational amplifier U1 and a buzzer RL. The power supply terminal of the operational amplifier U1 is connected to the output terminal of the voltage regulator module B. The input terminal of the operational amplifier U1 is electrically connected to the control terminal of an external control module through a sixth capacitor. The inverting input terminal of the operational amplifier U1 is grounded through a first resistor. The output terminal of the operational amplifier U1 is grounded through the buzzer RL. The voltage regulator module B includes a Zener transistor U2 and a transistor Q1. The input terminal of the Zener transistor U2 is electrically connected to the output terminal of the power supply module A and the collector of the transistor Q1, respectively. The output terminal of the Zener transistor U2 is electrically connected to the power supply terminal of the operational amplifier U1. The output terminal of the Zener transistor U2 is electrically connected to the emitter of the transistor Q1. The base of the transistor Q1 is electrically connected to the ground terminal of the Zener transistor U2. The voltage regulator module B is electrically connected to an evacuation indicator.

[0016] In this DC48V voice report evacuation indicator circuit, power module A is connected to the mains power, which is stepped down to output a stable working voltage. Then, voltage regulator module B regulates and amplifies the working voltage to provide a stable 48V power supply to voice indicator module C. Voice indicator module C outputs voice prompts to provide voice reports to pedestrians in the vicinity.

[0017] Specifically, the voice indication module C also includes a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a first diode D1, and a second diode D2. The non-inverting input terminal of the operational amplifier U1 is grounded through the second resistor R2 and the seventh capacitor C7. The non-inverting input terminal of the operational amplifier U1 is electrically connected to the output terminal of the operational amplifier U1 through the third resistor R3 and the eighth capacitor C8. The fourth resistor R4 is connected in parallel with the third resistor R3 and the eighth capacitor C8. The output terminal of the operational amplifier U1 is electrically connected to the cathode of the second diode D2. The anode of the second diode D2 is grounded through the ninth capacitor C9 and the tenth capacitor C10, respectively.

[0018] Specifically, the output terminal of the operational amplifier U1 is grounded through the fifth resistor R5 and the eleventh capacitor C11. The fifth resistor R5 and the eleventh capacitor C11 form an RC series filter circuit, which can filter the output signal of the operational amplifier U1.

[0019] Specifically, the input terminals of the Zener transistor U2 are grounded through the twelfth capacitor C12 and the thirteenth capacitor C13, respectively, and the output terminals of the Zener transistor U2 are grounded through the fourteenth capacitor C14 and the fifteenth capacitor C15, respectively. Transistor Q1 can play a current amplification role. When the buzzer RL is working, transistor Q1 is synchronously turned on by the Zener transistor U2. At this time, after transistor Q1 is connected, the voice indication module C increases the output power to ensure the reliable operation of the buzzer RL.

[0020] Specifically, the power module A includes a rectifier bridge N1 and a Zener diode TV1. The positive terminal of the output side of the rectifier bridge N1 is grounded through the fifth capacitor C5 and the Zener diode TV1. The output side of the rectifier bridge N1 is electrically connected to the input terminal of the Zener transistor U2. A common-mode inductor L1 is electrically connected to the input side of the rectifier bridge N1. The Zener diode TV1 can limit the output voltage of the rectifier bridge N1, reducing the voltage surge to the subsequent voltage regulator module B, thus providing protection.

[0021] Specifically, the input side of the common-mode inductor L1 is connected in parallel with the sixth resistor R6 and the first capacitor C1, respectively. The output side of the common-mode inductor L1 is connected in parallel with the second capacitor C2. The two ends of the output side of the common-mode inductor L1 are grounded through the third capacitor C3 and the fourth capacitor C4, respectively. The sixth resistor R6 and the first capacitor C1 form an RC filter circuit. The third capacitor C3 and the fourth capacitor C4 are X capacitors, which can filter noise in the mains power.

[0022] Based on the above description and inspired by this utility model, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A DC48V voice report evacuation indicator circuit, characterized in that: It includes a power supply module, a voltage regulator module, and a voice indication module. The power supply module is electrically connected to the voice indication module through the voltage regulator module, and the voltage regulator module is electrically connected to an evacuation indicator light. The voice instruction module includes an operational amplifier and a buzzer. The output terminal of the power supply regulator of the operational amplifier is connected to the output terminal of the external control module through a sixth capacitor. The inverting input terminal of the operational amplifier is grounded through a first resistor. The output terminal of the operational amplifier is grounded through a buzzer. The voltage regulator module includes a Zener transistor and a transistor. The input terminal of the Zener transistor is electrically connected to the output terminal of the power supply module and the collector of the transistor, respectively. The output terminal of the Zener transistor is electrically connected to the power supply terminal of the operational amplifier. The output terminal of the Zener transistor is electrically connected to the emitter of the transistor. The base of the transistor is electrically connected to the ground terminal of the Zener transistor.

2. The DC48V voice reporting evacuation indicator circuit according to claim 1, characterized in that: The voice indication module also includes a second resistor, a third resistor, a fourth resistor, a fifth resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a first diode, and a second diode. The non-inverting input of the operational amplifier is grounded through the second resistor and the seventh capacitor. The non-inverting input of the operational amplifier is electrically connected to the output of the operational amplifier through the third resistor and the eighth capacitor. The fourth resistor is connected in parallel with the third resistor and the eighth capacitor. The output of the operational amplifier is electrically connected to the cathode of the second diode. The anode of the second diode is grounded through the ninth capacitor and the tenth capacitor.

3. The DC48V voice reporting evacuation indicator circuit according to claim 2, characterized in that: The output of the operational amplifier is grounded through the fifth resistor and the eleventh capacitor.

4. The DC48V voice reporting evacuation indicator circuit according to claim 1, characterized in that: The input terminals of the Zener transistor are grounded through the twelfth and thirteenth capacitors, respectively, and the output terminals of the Zener transistor are grounded through the fourteenth and fifteenth capacitors, respectively.

5. The DC48V voice reporting evacuation indicator circuit according to claim 1, characterized in that: The power module includes a rectifier bridge and a Zener diode. The positive terminal of the output side of the rectifier bridge is grounded through a fifth capacitor and the Zener diode, respectively. The output side of the rectifier bridge is electrically connected to the input terminal of the Zener transistor, and a common-mode inductor is electrically connected to the input side of the rectifier bridge.

6. The DC48V voice reporting evacuation indicator circuit according to claim 5, characterized in that: The input side of the common-mode inductor is connected in parallel with the sixth resistor and the first capacitor, respectively. The output side of the common-mode inductor is connected in parallel with the second capacitor, and the two ends of the output side of the common-mode inductor are grounded through the third capacitor and the fourth capacitor, respectively.

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