A multifunctional alarm

Abstract

The utility model belongs to the technical field of alarms, and provides a multifunctional alarm, including a main control MCU, the main control MCU is electrically connected to a power circuit, the power circuit is electrically connected to an audio amplifier, the audio amplifier is signal-connected to a speaker, the main control MCU is signal-connected to a PIR signal conditioning circuit, the PIR signal conditioning circuit is signal-connected to a PIR pyroelectric sensor, and the PIR pyroelectric sensor is electrically connected to the power circuit. In the utility model, the main control MCU is used to control the normal operation of the whole machine, and the whole machine is put into a standby low power consumption mode without a key or trigger. When a trigger signal output by the PIR signal conditioning circuit is received, the whole machine is controlled to enter an alarm state, thereby reducing the energy consumption of the alarm device and making the standby time longer, thereby increasing the practicality of the alarm device.

Description

Technical Field

[0001] The utility model relates to the technical field of alarms, in particular to a multifunctional alarm. Background Art

[0002] Fire safety is the top priority of modern building safety protection, especially in places prone to fire such as warehouses and production workshops where flammable and explosive materials are stored. Fire alarms can monitor the monitored area in real time and can effectively reduce casualties and property losses caused by fires. There are many kinds of fire alarms on the market. Most of the detection elements are smoke sensors with single detection functions and high power consumption. They cannot accurately check whether there are people in the fire, and cannot enable rescue personnel to take rescue measures immediately. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a multifunctional alarm.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multifunctional alarm, including a main control MCU, the main control MCU is electrically connected to a power supply circuit, the power supply circuit is electrically connected to an audio power amplifier, the audio power amplifier is signal-connected to a speaker, the main control MCU is signal-connected to a PIR signal conditioning circuit, the PIR signal conditioning circuit is signal-connected to a PIR pyroelectric sensor, the PIR pyroelectric sensor is electrically connected to the power supply circuit, the main control MCU is signal-connected to a recording and playback control module, the main control MCU is signal-connected to a MIC sound source input, the MIC sound source input signal is connected to a recording sound source selection switch, the recording sound source selection switch signal is connected to the recording and playback control module, and the recording sound source selection switch is signal-connected to a LINE sound source input.

[0005] As a further description of the above technical solution:

[0006] The main control MCU is the core control circuit, which controls the normal operation of the whole machine, puts the whole machine into a standby low-power consumption mode without a key press or trigger, and controls the whole machine to enter an alarm state when receiving a trigger signal output by a PIR signal conditioning circuit.

[0007] As a further description of the above technical solution:

[0008] The main control MCU controls the whole machine to enter the recording state when the recording button is operated. In this state, the MIC sound source input is powered on so that the MIC sound source input can work normally, the audio power amplifier is turned off, the alarm is stopped, the recording and playback control module enters the recording state, and the information after the recording sound source is selected is saved in the memory of the recording and playback control module.

[0009] As a further description of the above technical solution:

[0010] The MIC sound source input controls the microphone signal input.

[0011] As a further description of the above technical solution:

[0012] The LINE audio source input controls the line input audio source.

[0013] As a further description of the above technical solution:

[0014] The recording sound source selection switch selects a microphone or a line input as the recording sound source.

[0015] As a further description of the above technical solution:

[0016] The power supply circuit supplies power to each module of the whole machine.

[0017] The utility model has the following beneficial effects:

[0018] 1. In the utility model, the main control MCU is used to control the normal operation of the whole machine, and the whole machine enters the standby low-power consumption mode under the condition of no key pressing and triggering. When the trigger signal output by the PIR signal conditioning circuit is received, the whole machine is controlled to enter the alarm state, thereby reducing the energy consumption of the alarm device and extending the standby time, thereby increasing the practicality of the alarm device.

[0019] 2. In the utility model, the main control MCU controls the whole machine to enter the recording state when the recording button is operated. In this state, the MIC sound source input is powered on so that the MIC sound source input can work normally, the audio amplifier is turned off, the alarm is stopped, and the recording and playback control module enters the recording state. The information after the recording sound source is selected is saved in the memory of the recording and playback control module, and the signal cause of the alarm can be stored in the control center for the staff to view. By providing a PIR pyroelectric sensor, it can actively detect whether there are people nearby, and can accurately check whether there are people in the fire, so that the rescue personnel can take rescue measures immediately. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a flow chart of a multifunctional alarm device.

[0021] Legend:

[0022] 1. Main control MCU; 2. Power supply circuit; 3. Audio amplifier; 4. Speaker; 5. PIR signal conditioning circuit; 6. PIR pyroelectric sensor; 7. Recording and playback control module; 8. Recording audio source selection switch; 9. MIC audio source input; 10. LINE audio source input. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Reference Figure 1 The utility model provides an embodiment: a multifunctional alarm, including a main control MCU1, the main control MCU1 is electrically connected to a power circuit 2, the power circuit 2 is electrically connected to an audio amplifier 3, the audio amplifier 3 is signal-connected to a speaker 4, the main control MCU1 is signal-connected to a PIR signal conditioning circuit 5, the PIR signal conditioning circuit 5 is signal-connected to a PIR pyroelectric sensor 6, the PIR pyroelectric sensor 6 is electrically connected to the power circuit 2, the main control MCU1 is signal-connected to a recording and playback control module 7, and the main control MCU1 is signal-connected to There is a MIC sound source input 9, the signal of the MIC sound source input 9 is connected to the recording sound source selection switch 8, the signal of the recording sound source selection switch 8 is connected to the recording and playback control module 7, and the signal on the recording sound source selection switch 8 is connected to the LINE sound source input 10. Through the main control MCU1, the normal operation of the whole machine is controlled, and the whole machine enters the standby low power consumption mode under the condition of no key pressing and triggering. When the trigger signal output by the PIR signal conditioning circuit 5 is received, the whole machine is controlled to enter the alarm state, thereby reducing the energy consumption of the alarm device and prolonging the standby time, thereby increasing the practicality of the alarm device.

[0025] The main control MCU1 is the core control circuit, which controls the normal operation of the whole machine. In the absence of a key or trigger, the whole machine enters a standby low-power consumption mode. When receiving a trigger signal output by the PIR signal conditioning circuit 5, the main control MCU1 controls the whole machine to enter a recording state. In this state, the MIC sound source input 9 is powered on so that the MIC sound source input 9 can work normally. The audio power amplifier 3 is turned off and the alarm is stopped. The recording and playback control module 7 enters a recording state, and the information after the recording sound source is selected is saved in the memory of the recording and playback control module 7. The MIC sound source input 9 controls the microphone signal input, the LINE sound source input 10 controls the line input sound source, and the recording sound source selection switch 8 The microphone or line input is selected as the recording audio source, and the power supply circuit 2 supplies power to each module of the whole machine. The main control MCU1 controls the whole machine to enter the recording state when the recording button is operated. In this state, the MIC audio source input 9 is powered on so that the MIC audio source input 9 can work normally, the audio power amplifier 3 is turned off, and the alarm is stopped. The recording and playback control module 7 enters the recording state, and the information after the recording audio source is selected is saved in the memory of the recording and playback control module 7, and then the signal cause of the alarm can be stored in the control center for the staff to view. By providing a PIR pyroelectric sensor 6, it can actively detect whether there are people nearby, and can accurately check whether there are people in the fire, so that the rescue personnel can take rescue measures immediately.

[0026] Working principle: When a fire occurs, first the PIR pyroelectric sensor 6 will actively detect whether there is human activity nearby, then the PIR signal conditioning circuit 5 will process the signal output by the PIR pyroelectric sensor 6, eliminate interference, identify the correct signal of human activity and output the signal to the main control MCU1, then the main control MCU1 will control the whole machine to enter the alarm state when receiving the trigger signal output by the PIR signal conditioning circuit 5, then the main control MCU1 controls the audio power amplifier 3 to turn on, the audio power amplifier 3 transmits the start signal to the speaker 4, so that the speaker 4 emits an alarm sound, and then controls the whole machine to enter the recording state when the recording button is operated. In this state, the MIC circuit is energized so that the MIC sound source input 9 can work normally, the audio power amplifier 3 is turned off, the alarm is stopped, and the recording and playback control module 7 is controlled to enter the recording state, and the information after the recording sound source is selected is saved in the memory of the recording and playback control module 7. Therefore, through such a setting, when a fire occurs, it can be ensured whether there is anyone at the fire location, so that rescue personnel can take rescue measures immediately.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional alarm, comprising a main control MCU (1), characterized in that: The main control MCU (1) is electrically connected to a power circuit (2), the power circuit (2) is electrically connected to an audio power amplifier (3), the audio power amplifier (3) is signal-connected to a speaker (4), the main control MCU (1) is signal-connected to a PIR signal conditioning circuit (5), the PIR signal conditioning circuit (5) is signal-connected to a PIR pyroelectric sensor (6), the PIR pyroelectric sensor (6) is electrically connected to the power circuit (2), the main control MCU (1) is signal-connected to a recording and playback control module (7), the main control MCU (1) is signal-connected to a MIC sound source input (9), the MIC sound source input (9) is signal-connected to a recording sound source selection switch (8), the recording sound source selection switch (8) is signal-connected to the recording and playback control module (7), and the recording sound source selection switch (8) is signal-connected to a LINE sound source input (10).

2. A multifunctional alarm according to claim 1, characterized in that: The main control MCU (1) is a core control circuit that controls the normal operation of the entire machine, enables the entire machine to enter a standby low-power consumption mode when no key is pressed or triggered, and controls the entire machine to enter an alarm state when receiving a trigger signal output by a PIR signal conditioning circuit (5).

3. A multifunctional alarm according to claim 1, characterized in that: The main control MCU (1) controls the whole machine to enter a recording state when a recording key is operated. In this state, the MIC sound source input (9) is powered on so that the MIC sound source input (9) can work normally, the audio power amplifier (3) is turned off, the alarm is stopped, the recording and playback control module (7) enters a recording state, and the information after the recording sound source is selected is stored in the memory of the recording and playback control module (7).

4. A multifunctional alarm according to claim 1, characterized in that: The MIC sound source input (9) controls the microphone signal input.

5. A multifunctional alarm according to claim 1, characterized in that: The LINE audio source input (10) controls the line input audio source.

6. A multifunctional alarm according to claim 1, characterized in that: The recording sound source selection switch (8) selects a microphone or a line input as the recording sound source.

7. A multifunctional alarm according to claim 1, characterized in that: The power supply circuit (2) supplies power to each module of the whole machine.

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