Alarm and gas detection alarm system

Abstract

The utility model provides an alarm and a gas detection alarm system. The alarm comprises a grading signal detection module, a processor and an alarm execution module. The processor comprises a detection input end and an alarm output end; the grading signal detection module comprises two detection ends and an output end, the output end of the grading signal detection module is connected with the detection input end of the processor, and the alarm output end of the processor is connected with the alarm execution module; when the two detection ends of the grading signal detection module are configured to be mutually conducted or disconnected, the output ends of the grading signal detection module respectively output two different signals; the processor outputs two different alarm signals based on different signals received by the detection input end; and the alarm execution module executes two different alarm outputs based on the received different alarm signals, and can be applied to some application scenes needing graded alarm.

Description

Technical Field

[0001] This utility model relates to the field of safety alarm technology, and in particular to an alarm device and a gas detection alarm system. Background Technology

[0002] An alarm is an alarm execution device used in the field of safe production. It is often used in conjunction with various types of detectors. When the detector detects that the corresponding object exceeds the limit, the alarm is triggered and emits an alarm, such as sound, light, or vibration.

[0003] However, while existing alarms combine various types such as sound and light, the alarm meaning for each type is only one, meaning they can only emit one sound or flash one light at one frequency. This only indicates that the detector has detected the corresponding object exceeding the limit, but cannot distinguish the specific level or magnitude of the exceedance. This causes inconvenience for the application of some detectors. Utility Model Content

[0004] The purpose of this invention is to provide an alarm and a gas detection alarm system to solve the problem that existing alarms are limited to outputting only a single type of alarm when they are working.

[0005] To solve the above-mentioned technical problems, this utility model provides an alarm, which includes: a graded signal detection module, a processor, and an alarm execution module;

[0006] The processor includes a detection input terminal and an alarm output terminal; the graded signal detection module includes two detection terminals and one output terminal, the output terminal of the graded signal detection module is connected to the detection input terminal of the processor, and the alarm output terminal of the processor is connected to the alarm execution module.

[0007] When the two detection terminals of the graded signal detection module are configured to be mutually connected or mutually disconnected, the output terminal of the graded signal detection module outputs two different signals respectively; the processor outputs two different alarm signals based on the different signals received by the detection input terminal; the alarm execution module executes two different alarm outputs based on the different alarm signals received.

[0008] Optionally, the alarm execution module includes a sound output device; the alarm output terminal of the processor includes a first output terminal, which is connected to the sound output device.

[0009] The alarm signal includes an audio signal. Based on the different signals received by the detection input terminal, the processor outputs a corresponding audio signal to the audio output device through the first output terminal. The audio output device emits a corresponding sound based on the received audio signal.

[0010] Optionally, the alarm execution module includes a sound driving unit and a sound output device;

[0011] The processor's alarm output terminal includes a second output terminal, and the sound driving unit includes an input terminal and an output terminal; the input terminal of the sound driving unit is connected to the second output terminal; the output terminal of the sound driving unit is connected to the sound output device.

[0012] The alarm signal includes a sound switching signal. Based on the different signals received by the detection input terminal, the processor outputs a corresponding sound switching signal to the sound driving unit through the second output terminal. The sound driving unit emits a corresponding sound signal based on the received sound switching signal. The sound output device emits a corresponding sound based on the received sound signal.

[0013] Optionally, the alarm execution module includes an LED driver unit and an LED array; the alarm output terminal of the processor includes a third output terminal, which is connected to the LED array through the LED driver unit;

[0014] The alarm signal includes an LED driving signal. Based on the different signals received at the detection input terminal, the processor outputs a corresponding LED driving signal to the LED driving unit through the third output terminal. The LED driving unit drives the LED array to emit corresponding light based on the received LED driving signal.

[0015] Optionally, the alarm execution module includes two sets of LED driving units and two sets of LED arrays; the two sets of LED driving units and the two sets of LED arrays are connected in a one-to-one correspondence.

[0016] Optionally, the alarm also includes an inter-board pin module, the processor is disposed on the first circuit board, the two sets of LED driving units and the two sets of LED arrays are disposed on the second circuit board, and the first circuit board and the second circuit board are connected through the inter-board pin module.

[0017] Optionally, the graded signal detection module includes a signal processing and protection unit; one detection terminal of the graded signal detection module is connected to the output terminal of the graded signal detection module through the signal processing and protection unit, and the other detection terminal of the graded signal detection module is grounded.

[0018] Optionally, the alarm further includes a power module for supplying power to the processor and the alarm execution module; the processor is configured to trigger the output of an alarm signal upon power-up of the power module.

[0019] To solve the above-mentioned technical problems, this utility model also provides a gas detection alarm system, which includes the alarm as described above, and also includes a gas detector and dry contact signal components. The dry contact signal components are respectively connected to the two detection terminals of the graded signal detection module. The gas detector is configured to drive the dry contact signal components to turn on or off based on the gas concentration range, so that the alarm can realize graded alarm output.

[0020] Optionally, the gas detection alarm system further includes a power supply unit, which is configured to supply power to the alarm when the gas concentration range reaches an alarm threshold, so as to trigger the alarm.

[0021] In summary, in the alarm and gas detection alarm system provided by this utility model, the alarm includes: a graded signal detection module, a processor, and an alarm execution module; the processor includes a detection input terminal and an alarm output terminal; the graded signal detection module includes two detection terminals and one output terminal, the output terminal of the graded signal detection module is connected to the detection input terminal of the processor, and the alarm output terminal of the processor is connected to the alarm execution module; when the two detection terminals of the graded signal detection module are configured to be mutually connected or mutually disconnected, the output terminal of the graded signal detection module outputs two different signals respectively; the processor outputs two different alarm signals based on the different signals received by the detection input terminal; the alarm execution module executes two different alarm outputs based on the different alarm signals received.

[0022] With this configuration, based on the tiered signal detection module, its two detection terminals can output two different signals when they are turned on or off. The processor, based on the different signals received at the detection input terminals, outputs two different alarm signals, thus enabling the alarm execution module to perform two different alarm outputs. This allows the alarm to output two distinguishable alarm signals, making it suitable for applications requiring tiered alarms. Attached Figure Description

[0023] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention.

[0024] Figure 1 This is a schematic diagram of the functional modules of the alarm device according to an embodiment of the present invention.

[0025] Figure 2 This is a circuit diagram of the alarm device according to an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the functional modules of the gas detection alarm system according to an embodiment of the present invention.

[0027] In the attached diagram: 1-Graded signal detection module; 11-Detection terminal; 12-Output terminal; 13-Signal processing and protection unit; 2-Processor; 21-Detection input terminal; 22-Alarm output terminal; 221-First output terminal; 222-Second output terminal; 223-Third output terminal; 3-Alarm execution module; 31-Sound output device; 32-Sound driving unit; 321-Input terminal; 322-Output terminal; 33-LED driving unit; 34-LED array; 4-Inter-board pin module; 5-Power supply module; 51-DC-DC chip; 52-LDO linear regulator; 61-Gas detector; 62-Dry contact signal components; 63-Power supply unit. Detailed Implementation

[0028] To make the objectives, advantages, and features of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the objectives of the embodiments of this utility model. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, different drawings may emphasize different aspects and sometimes use different scales.

[0029] As used in this invention, the singular forms “a,” “an,” “one,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the term “at least two” is generally used to mean “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature; “one end” and “the other end,” and “proximal end” and “distal end” generally refer to two corresponding parts, which include not only endpoints. Furthermore, the terms "installed," "connected," and "attached," as used in this utility model, and the term "set" on one element from another, should be interpreted broadly. They generally only indicate a connection, coupling, cooperation, or transmission relationship between the two elements, which can be direct or indirect through an intermediate element. They should not be construed as indicating or implying a spatial positional relationship between the two elements, meaning one element can be located inside, outside, above, below, or to one side of the other element, unless otherwise explicitly stated. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances. Additionally, directional terms such as above, below, up, down, upward, downward, left, and right are used relative to exemplary embodiments as shown in the figures, with upward or up direction pointing towards the top of the corresponding figure, and downward or down direction pointing towards the bottom of the corresponding figure.

[0030] The purpose of this invention is to provide an alarm and a gas detection alarm system to solve the problem that existing alarms are limited to outputting only a single type of alarm information when they are working. The following description refers to the accompanying drawings.

[0031] In some detection applications, such as gas detection, after a gas leak occurs, gas detectors are set to level one and level two alarms according to standards to distinguish the degree of leakage and the level of danger. Existing alarms can only output a single type of alarm, making them unsuitable for such applications, or requiring separate alarms for level one and level two alarms, which is inconvenient and increases costs.

[0032] To resolve this issue, please refer to [link / reference]. Figure 1This utility model provides an alarm device, comprising: a graded signal detection module 1, a processor 2, and an alarm execution module 3; the processor 2 includes a detection input terminal 21 and an alarm output terminal 22; the graded signal detection module 1 includes two detection terminals 11 and one output terminal 12, the output terminal 12 of the graded signal detection module 1 is connected to the detection input terminal 21 of the processor 2, and the alarm output terminal 22 of the processor 2 is connected to the alarm execution module 3. When the two detection terminals 11 of the graded signal detection module 1 are configured to be mutually connected or mutually disconnected, the output terminal 12 of the graded signal detection module 1 outputs two different signals respectively; the processor 2 outputs two different alarm signals based on the different signals received by the detection input terminal 21; the alarm execution module 3 executes two different alarm outputs based on the different alarm signals received.

[0033] With this configuration, by externally configuring the two detection terminals 11 to make them mutually connected or disconnected, the alarm signal output by the processor 2 can be changed, thereby achieving two different alarm outputs. Therefore, the alarm provided in this embodiment can be applied to some application scenarios requiring graded alarms.

[0034] The following is combined Figure 2 The alarm provided in this embodiment will be further illustrated in an exemplary manner.

[0035] In one example, in the graded signal detection module 1, one of the two detection terminals 11 is grounded, and the other is connected to the output terminal 12 (optionally connected to the output terminal 12 via the signal processing and protection unit 13, as detailed below). Thus, when the two detection terminals 11 are configured to be mutually conductive by external dry contact signal components (such as relays or switches), the two detection terminals 11 are electrically directly connected. At this time, the level of the output terminal 12 is pulled low, and the entire graded signal detection module 1 outputs a low-level signal. Conversely, when the two detection terminals 11 are configured to be mutually disconnected by external dry contact signal components, the detection terminal 11 connected to the output terminal 12 is left floating, and the entire graded signal detection module 1 outputs a floating level signal.

[0036] Furthermore, the graded signal detection module 1 includes a signal processing and protection unit 13; one detection terminal 11 of the graded signal detection module 1 is connected to the output terminal 12 of the graded signal detection module 1 through the signal processing and protection unit 13, and the other detection terminal 11 of the graded signal detection module 1 is grounded. The function of the signal processing and protection unit 13 is to perform signal filtering, overvoltage protection, and electrostatic discharge protection. Its specific structure can be found in the prior art, and will not be described in detail in this embodiment.

[0037] Processor 2 may include devices such as a microcontroller or a programmable logic controller (PLC), and ports such as detection input terminal 21 and alarm output terminal 22 may be pin ports on processor 2. Detection input terminal 21 is connected to the output terminal 12 of the graded signal detection module 1, thereby obtaining the output signal of the graded signal detection module 1. Based on the internal logic or program of processor 2, the low-level signal or floating-level signal on detection input terminal 21 is distinguished to determine the required alarm level, and alarm information corresponding to the current alarm level is output from alarm output terminal 22.

[0038] For example, when an alarm is used in a gas detection alarm system, the gas detector is connected to the two detection terminals 11 of the graded signal detection module 1 via a dry contact signal component (such as an alarm relay). When the gas detector detects that the gas concentration is between the first and second thresholds, it controls the dry contact signal component to disconnect. At this time, the processor 2 recognizes a floating level signal on the detection input terminal 21 and determines that the current alarm level is a level one alarm. The alarm output terminal 22 outputs alarm information corresponding to the level one alarm. When the gas detector detects that the gas concentration exceeds the second threshold, it controls the dry contact signal component to engage. At this time, the processor 2 recognizes a low level signal on the detection input terminal 21 and determines that the current alarm level is a level two alarm. The alarm output terminal 22 outputs alarm information corresponding to the level two alarm.

[0039] The alarm information output by processor 2 can vary depending on the alarm execution module 3. Alarm information may include, for example, audible signals, audible switching signals, or LED drive signals.

[0040] In one embodiment, the alarm execution module 3 includes a sound output device 31; the alarm output terminal 22 of the processor 2 includes a first output terminal 221, which is connected to the sound output device 31; the alarm signal includes a sound signal, and the processor 2 outputs a corresponding sound signal to the sound output device 31 through the first output terminal 221 based on different signals received by the detection input terminal 21; the sound output device 31 emits a corresponding sound based on the received sound signal. In this embodiment, the alarm can be triggered by sound. The sound can include at least one of voice, music, or siren. The sound output device 31 is an actuator that emits sound, such as a horn or buzzer. The processor 2 can pre-store waveform information corresponding to two different alarm levels, for example, the program contains two different voice waveforms. After the processor 2 determines the signal level on the detection input terminal 21, it can output a corresponding sound signal through the first output terminal 221 ( Figure 2The processor 2's pin 13 / PA6 port directly outputs the sound signal corresponding to the current alarm level, which is then amplified. Figure 2 The sound output is then played back through the sound output device 31 (components such as Q1 and Q2).

[0041] In another embodiment, the alarm can also be triggered by sound. The difference from the previous embodiment is that the processor 2 does not store the waveform information of the sound signal, but outputs the sound signal through an external sound driving unit 32. In this case, the processor 2 is used to control the sound driving unit 32, and the alarm signal includes a sound switching signal.

[0042] Optionally, the alarm execution module 3 includes a sound driving unit 32 and a sound output device 31; the alarm output terminal 22 of the processor 2 includes a second output terminal 222, and the sound driving unit 32 includes an input terminal 321 and an output terminal 322; the input terminal 321 of the sound driving unit 32 is connected to the second output terminal 222; the output terminal 322 of the sound driving unit 32 is connected to the sound output device 31; the processor 2 outputs a corresponding sound switching signal to the sound driving unit 32 through the second output terminal 222 based on different signals received by the detection input terminal 21; the sound driving unit 32 emits a corresponding sound signal based on the received sound switching signal; and the sound output device 31 emits a corresponding sound based on the received sound signal.

[0043] The sound driving unit 32 can pre-store waveform information of sound signals corresponding to two different alarm levels, and the sound driving unit 32 can select different sound signals for output based on different sound switching signals on its input terminal 321. Figure 2 In the illustrated example, the sound driver unit 32 uses an AC9561 sound chip. Its input terminal 321 includes two ports, F1 (pin 7) and F2 (pin 3). By applying different levels to these two ports, various outputs can be selectively achieved. The F1 and F2 ports of input terminal 321 are connected to pins 15 and 14 of processor 2, respectively. Processor 2 can output sound switching signals, such as corresponding high and low level combinations, through pins 15 and 14 to control the sound driver unit 32 and select different sound signals. The sound signal output from output terminal 322 (pin 1) can be coupled to the input terminal of the amplifier circuit through resistor R54, and then played out through the sound output device 31.

[0044] Optionally, the processor 2 can be configured to output audio signals directly, and it can also be configured to output audio signals indirectly through the audio driver unit 32, with both serving as backups for each other. For example, in a standard configuration, the processor 2 can output audio signals directly, while the audio driver unit 32 acts as a backup. By changing the program of the processor 2 or the levels of certain ports, the output can be switched to the audio driver unit 32.

[0045] In one embodiment, the alarm can also be triggered by light, such as by flashing LEDs. Optionally, the alarm execution module 3 includes an LED driver unit 33 and an LED array 34; the alarm output terminal 22 of the processor 2 includes a third output terminal 223, which is connected to the LED array 34 through the LED driver unit 33. The alarm signal includes an LED driving signal. Based on different signals received at the detection input terminal 21, the processor 2 outputs a corresponding LED driving signal to the LED driver unit 33 through the third output terminal 223; the LED driver unit 33 drives the LED array 34 to emit corresponding light based on the received LED driving signal.

[0046] exist Figure 2 In the illustrated example, the LED driving unit 33 may include components such as amplifiers (e.g., transistors), and the LED array 34 may contain multiple LEDs, each of which may be connected in series with a current-limiting resistor. The LED driving signal output by the processor 2 through the third output terminal 223 may be a PWM wave with a certain duty cycle. After being output to the LED driving unit 33, it is amplified and can drive each LED in the LED array 34 to blink at the corresponding frequency. Corresponding to two different alarm levels, the duty cycles of the PWM waves of the two LED driving signals are different, which is ultimately reflected in the LEDs as blinking at different frequencies. It can be understood that the LED driving signal is not limited to a blinking signal with a constant duty cycle; it may also contain a combination of several blinking frequencies of different lengths. For example, for a level one alarm, the LED may blink with alternating short and long blinks, while for a level two alarm, the LED may blink continuously with short blinks, and so on.

[0047] Optionally, the alarm execution module 3 includes two sets of LED driving units 33 and two sets of LED arrays 34; the two sets of LED driving units 33 and the two sets of LED arrays 34 are connected one-to-one. Considering that the light alarm method has a certain directionality, when observing the alarm from different directions, there is a possibility that the light in one direction may be blocked. Therefore, two sets of corresponding LED driving units 33 and LED arrays 34 can be set in different areas of the alarm. Furthermore, distinguishing between the two sets of LED driving units 33 and LED arrays 34 can also reduce the driving power limit for each LED driving unit 33, reducing the load borne by each LED driving unit 33. At the same time, the two sets of LED driving units 33 and LED arrays 34 serve as backups for each other, so even if one set fails, it will not hinder the operation of the other set, improving the robustness of the alarm.

[0048] Optionally, the alarm further includes an inter-board pin module 4. The processor 2 is mounted on the first circuit board, and the two sets of LED driver units 33 and the two sets of LED arrays 34 are mounted on the second circuit board. The first circuit board and the second circuit board are connected through the inter-board pin module 4. In practice, the alarm often includes a housing and several circuit boards. For ease of layout, assembly, and heat dissipation, components such as the processor 2 can be arranged on the first circuit board, while all LED driver units 33 and LED arrays 34 can be arranged on the second circuit board. The first circuit board and the second circuit board are connected through the inter-board pin module 4. The inter-board pin module 4 can use pins commonly used in the art, which will not be described in detail in this embodiment.

[0049] Optionally, the alarm further includes a power module 5, which supplies power to the processor 2 and the alarm execution module 3; the processor 2 is configured to trigger an output alarm signal upon power-up of the power module 5. Figure 2 In the illustrated example, power module 5 includes a DC-DC chip 51 and an LDO linear regulator 52. The DC-DC chip 51 allows for a wide range of input voltages, such as 4.5V to 28V. Its output voltage can be selected as 5V to power the alarm execution module 3. Furthermore, the 5V output from the DC-DC chip 51 is passed through the LDO linear regulator 52 to obtain a 3.3V output, which powers the processor 2.

[0050] The alarm provided in this embodiment can be triggered to output an alarm signal when the power module 5 is powered on. That is, the processor 2 and the alarm execution module 3 only start working when the power module 5 is powered on, and the entire alarm has no standby power consumption when the power module 5 is powered off and not working.

[0051] Please refer to Figure 3Based on the alarm described above, this embodiment of the invention also provides a gas detection alarm system, which includes the alarm described above, a gas detector 61, and a dry contact signal component 62. The dry contact signal component 62 is connected to the two detection terminals 11 of the graded signal detection module 1. The gas detector 61 is configured to drive the dry contact signal component 62 to conduct or disconnect based on the gas concentration range, so that the alarm can achieve graded alarm output. The dry contact signal component 62 generally has two non-polarized contacts, which typically have two states: closed and open, such as a relay or switch. In the gas detection alarm system provided in this embodiment, the closing or not of the dry contact signal component 62 is switched based on the output of the gas detector 61. In one example, the alarm threshold for gas concentration can be further divided into a first threshold and a second threshold (the second threshold is greater than the first threshold). When the gas detector 61 detects that the gas concentration is between the first threshold and the second threshold, it controls the dry contact signal component 62 to disconnect. When the gas detector 61 detects that the gas concentration exceeds the second threshold, it controls the dry contact signal component 62 to close and conduct. This enables the control of the alarm's tiered alarm function.

[0052] Furthermore, the gas detection alarm system also includes a power supply unit 63, which is configured to supply power to the alarm when the gas concentration reaches an alarm threshold, thereby triggering the alarm. The alarm threshold here can refer to the minimum gas concentration required to trigger an alarm, which can be understood as the aforementioned first threshold. The power supply unit 63 is preferably controlled based on the output of the gas detector 61. This allows the alarm to be linked with the detection of the gas detector 61. In one embodiment, when the gas detector 61 detects that the gas concentration exceeds the first threshold, it controls the power supply unit 63 to output power to the alarm. Specifically, the power supply unit 63 can be connected to the power module 5 of the alarm. When the power supply unit 63 outputs power, the processor 2 is powered on and the alarm is triggered through the switching of the power module 5. It is understood that the alarm level output by the alarm is also determined based on the gas concentration detected by the gas detector 61, and is switched by the closing or opening of the dry contact signal component 62, as detailed above.

[0053] It should be noted that the gas detection alarm system described above is merely an application example of the alarm in this embodiment and not a limitation on the application scenarios of the alarm. In other embodiments, the alarm can also be applied to other application areas, such as water quality detection and temperature detection.

[0054] In summary, the alarm and gas detection alarm system provided by this utility model includes: a graded signal detection module, a processor, and an alarm execution module; the processor includes a detection input terminal and an alarm output terminal; the graded signal detection module includes two detection terminals and one output terminal, the output terminal of the graded signal detection module is connected to the detection input terminal of the processor, and the alarm output terminal of the processor is connected to the alarm execution module; when the two detection terminals of the graded signal detection module are configured to be mutually connected or mutually disconnected, the output terminal of the graded signal detection module outputs two different signals respectively; the processor outputs two different alarm signals based on the different signals received by the detection input terminal; the alarm execution module executes two different alarm outputs based on the different alarm signals received. With this configuration, based on the setting of the graded signal detection module, its two detection terminals can output two different signals when connected or disconnected, the processor outputs two different alarm signals based on the different signals received by the detection input terminal, and thus the alarm execution module can execute two different alarm outputs. This allows the alarm to output two distinguishable alarm signals, making it suitable for some application scenarios requiring graded alarms.

[0055] It should be noted that the above embodiments can be combined with each other. The above description is only a description of preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the present utility model.

Claims

1. An alarm, characterized in that The alarm device comprises a hierarchical signal detection module, a processor and an alarm execution module. The processor comprises a detection input end and an alarm output end; the hierarchical signal detection module comprises two detection ends and an output end, the output end of the hierarchical signal detection module is connected with the detection input end of the processor, and the alarm output end of the processor is connected with the alarm execution module. When the two detection ends of the hierarchical signal detection module are configured to be connected with each other or disconnected with each other, the output end of the hierarchical signal detection module outputs two different signals respectively; the processor outputs two different alarm signals based on the different signals received by the detection input end; and the alarm execution module executes two different alarm outputs based on the different alarm signals received. The alarm execution module comprises a sound output device; the alarm output end of the processor comprises a first output end, and the first output end is connected with the sound output device.

2. The alarm of claim 1, wherein, The alarm signal comprises a sound signal, the processor outputs a corresponding sound signal to the sound output device through the first output end based on the different signals received by the detection input end, and the sound output device emits a corresponding sound based on the sound signal received. The alarm execution module comprises a sound driving unit and a sound output device.

3. The alarm of claim 1, wherein, The alarm output end of the processor comprises a second output end, the sound driving unit comprises an input end and an output end, the input end of the sound driving unit is connected with the second output end, and the output end of the sound driving unit is connected with the sound output device. The alarm signal comprises a sound switching signal, the processor outputs a corresponding sound switching signal to the sound driving unit through the second output end based on the different signals received by the detection input end, the sound driving unit emits a corresponding sound signal based on the sound switching signal received, and the sound output device emits a corresponding sound based on the sound signal received. The alarm execution module comprises an LED driving unit and an LED array; the alarm output end of the processor comprises a third output end, and the third output end is connected with the LED array through the LED driving unit.

4. The alarm of claim 1, wherein, The alarm signal comprises an LED driving signal, the processor outputs a corresponding LED driving signal to the LED driving unit through the third output end based on the different signals received by the detection input end. The LED driving unit drives the LED array to emit a corresponding light based on the LED driving signal received. The alarm execution module comprises two groups of the LED driving unit and two groups of the LED array; the two groups of the LED driving unit and the two groups of the LED array are connected one by one.

5. The alarm of claim 4, wherein, The alarm device further comprises an inter-board pin module, the processor is arranged on a first circuit board, the two groups of the LED driving unit and the two groups of the LED array are arranged on a second circuit board, and the first circuit board and the second circuit board are connected through the inter-board pin module.

6. The alarm of claim 5, wherein, ​ 7. The alarm of claim 1, wherein, The hierarchical signal detection module comprises a signal processing protection unit; one detection end of the hierarchical signal detection module is connected with an output end of the hierarchical signal detection module through the signal processing protection unit, and the other detection end of the hierarchical signal detection module is grounded.

8. The alarm of claim 1, wherein, The alarm further comprises a power module, which is configured to supply power to the processor and the alarm execution module; the processor is configured to trigger an alarm signal based on power-on of the power module.

9. A gas detection alarm system, characterized in that The alarm according to any one of claims 1-8 further comprises a gas detector and dry contact signal components, the dry contact signal components are respectively connected with two detection ends of the hierarchical signal detection module; the gas detector is configured to drive the dry contact signal components to be turned on or turned off based on a gas concentration range, so that the alarm realizes hierarchical alarm output.

10. The gas detection alarm system of claim 9, wherein, The gas detection alarm system further comprises an energy supply unit, which is configured to supply energy to the alarm to trigger the alarm when the gas concentration range reaches an alarm threshold.

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