Low-power-consumption combustible gas alarm

Abstract

The low-power-consumption combustible gas alarm comprises a single-chip microcomputer, a power management circuit, a sound-light alarm circuit, a communication circuit, a wireless transmission circuit and a sensor circuit. The power supply management circuit, the sound-light alarm circuit, the communication circuit, the wireless transmitting circuit and the sensor circuit are respectively connected with the single chip microcomputer, the power supply management circuit is connected with an external power supply, and the sound-light alarm circuit is connected with the buzzer. The battery can stably run for a long time without frequently replacing the battery, so that the use cost of a user is reduced, and the user experience is also improved; and meanwhile, the low-power-consumption sensor has the characteristics of high precision and high stability, the household gas concentration can be accurately monitored, and even under the condition of tiny change, the household gas concentration can be quickly sensed and counteracted, so that the gas leakage can be found in time, and the potential safety risk is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas alarms, in particular to a low-power combustible gas alarm. Background Art

[0002] With the rapid development of the gasification project, the importance of gas leakage detection alarms has become even more prominent. Currently, there are two types of gas alarms on the market.

[0003] The first type is directly powered by 220V mains electricity, which continuously monitors the gas concentration value in the working environment and reports it to the background through NB-IoT. This alarm cannot close the valve when gas leakage occurs and cannot detect whether gas leaks when powered off, so there are deficiencies.

[0004] The second type of alarm is powered by a lithium battery and is equipped with a mechanical lock. This type of gas alarm can continuously detect gas leakage throughout the year with a rechargeable lithium battery and a charger. When the gas concentration in the working environment is too high, it will control the mechanical hand to close the valve on the gas pipeline, cut off the gas source, and upload the abnormal situation to the background server through NB-IoT. However, this type of alarm has a relatively high power consumption because it directly controls the mechanical hand to close the valve, and the lithium battery cannot support long-term standby. In addition, due to the special installation location, it is difficult to charge the alarm.

[0005] Therefore, it is urgent to design a low-power combustible gas alarm to overcome one or more of the above-mentioned deficiencies of the existing technologies. Summary of the Utility Model

[0006] The technical solution adopted by the utility model to solve the above technical problems is: to provide a low-power combustible gas alarm, which is characterized by including: a single-chip microcomputer, a power management circuit, a sound and light alarm circuit, a communication circuit, a wireless transmission circuit, and a sensor circuit; the power management circuit, the sound and light alarm circuit, the communication circuit, the wireless transmission circuit, and the sensor circuit are respectively connected to the single-chip microcomputer, the power management circuit is connected to an external power source, the sound and light alarm circuit is connected to a buzzer, the communication circuit is used to send alarm information to a smart terminal, and the wireless transmission circuit is used to send control instructions to an external gas control valve.

[0007] In a preferred embodiment, the power management circuit includes: a power supply circuit, a reset circuit, and a crystal oscillator circuit; the power supply circuit, the reset circuit, and the crystal oscillator circuit are respectively connected to the single-chip microcomputer.

[0008] In a preferred embodiment, it further includes: an LCD display circuit, the LCD display circuit is connected to the single-chip microcomputer, and the LCD display circuit is further connected to a display screen for displaying the current gas concentration.

[0009] In a preferred embodiment, the sensor circuit is further connected to an operational amplifier circuit, and the sensor circuit is connected to the single-chip microcomputer through the operational amplifier circuit.

[0010] In a preferred embodiment, it further includes: an infrared receiving circuit, the infrared receiving circuit is connected to the single-chip microcomputer, and the infrared receiving circuit is further connected to an infrared remote control.

[0011] In a preferred embodiment, the single-chip microcomputer is further connected to an off-line clock circuit, and the off-line clock circuit is connected to the display screen for displaying the time.

[0012] In a preferred embodiment, the sensor is connected to a catalytic combustion type sensor.

[0013] The beneficial effects of the present utility model are as follows: (1) By adopting low-power sensors and microprocessors, the energy consumption of the alarm is significantly reduced, enabling it to operate stably for a long time without the need to frequently replace the battery. This design not only reduces the user's usage cost but also improves the user experience.

[0014] (2) The selected low-power sensors have the characteristics of high precision and high stability, and can accurately monitor the gas concentration in the home. Even in the case of minor changes, they can quickly detect and respond, which ensures that gas leakage can be detected in a timely manner and effectively avoids potential safety risks.

[0015] (3) Through the single-chip microcomputer, the sensor data can be accurately analyzed to determine whether there is gas leakage, and the alarm is triggered after confirmation. This intelligent control avoids false alarms and missed alarms, and improves the accuracy and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the connection block diagram of the present utility model;

[0017] Figure 2 is the circuit diagram of the power supply circuit of the present utility model;

[0018] Figure 3 is the operational amplifier circuit diagram of the present utility model;

[0019] Figure 4 is the communication circuit diagram of the present utility model;

[0020] Figure 5 is the wireless transmission circuit diagram of the present utility model.

[0021] In the figure:

[0022] 10. Single-chip microcomputer; 11. Power management circuit; 111. Power supply circuit; 112. Reset circuit; 113. Crystal oscillator circuit; 12. Acousto-optic alarm circuit; 13. Wireless transmission circuit; 14. Communication circuit; 15. LCD display circuit; 16. Offline clock circuit; 17. Sensor circuit; 18. Operational amplifier circuit; 19. Infrared receiving circuit. Detailed implementation manners

[0023] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0024] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct communication or an indirect communication through an intermediate medium. Among them, "fixing" means that they are connected to each other and the relative position relationship after connection remains unchanged. The orientation terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only references to the direction of the accompanying drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the embodiments of the present utility model.

[0025] In the embodiments of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0026] In the embodiments of the present utility model, "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0027] References to "one embodiment" or "some embodiments" or the like described in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present utility model. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc., which appear in different places in this specification, do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0028] As Figures 1 - 5 shown, the present utility model provides a low-power combustible gas alarm, which is characterized by comprising: a single-chip microcomputer 10, a power management circuit 11, a sound and light alarm circuit 12, a communication circuit 14, a wireless transmission circuit 13, and a sensor circuit 17; the power management circuit 11, the sound and light alarm circuit 12, the communication circuit 14, the wireless transmission circuit 13, and the sensor circuit 17 are respectively connected to the single-chip microcomputer 10, the power management circuit 11 is connected to an external power supply, the sound and light alarm circuit 12 is connected to a buzzer, the communication circuit 14 is used to send alarm information to an intelligent terminal, and the wireless transmission circuit 13 is used to send a control instruction to an external gas control valve.

[0029] Further, the power management circuit 11 comprises: a power supply circuit 111, a reset circuit 112, and a crystal oscillator circuit 113; the power supply circuit 111, the reset circuit 112, and the crystal oscillator circuit 113 are respectively connected to the single-chip microcomputer 10.

[0030] Further, it further comprises: an LCD display circuit 15, the LCD display circuit 15 is connected to the single-chip microcomputer 10, and the LCD display circuit 15 is further connected to a display screen for displaying the current gas concentration.

[0031] Further, the sensor circuit 17 is further connected to an operational amplifier circuit 18, and the sensor circuit 17 is connected to the single-chip microcomputer 10 through the operational amplifier circuit 18.

[0032] Further, it further comprises: an infrared receiving circuit 19, the infrared receiving circuit 19 is connected to the single-chip microcomputer 10, and the infrared receiving circuit 19 is further connected to an infrared remote control.

[0033] Further, the single-chip microcomputer 10 is further connected to an off-line clock circuit 16, and the off-line clock circuit 16 is connected to the display screen for displaying the time.

[0034] Furthermore, the sensor is connected to a catalytic combustion type sensor.

[0035] Specifically, the sensor is preferably a catalytic combustion type sensor. This type of sensor has the characteristics of low power consumption, miniaturization, short response time, high reliability, etc. This type of sensor can achieve 0uA in the sleep state. The heating time is 130ms and the heating current is 20mA, which can wake up all the substances detected by the sensor. The single-chip microcomputer 10 uses a low-power microcontroller as the core control unit. This single-chip microcomputer 10 can achieve a power consumption of 4uA in the sleep state of the system, and controls the low-power operation through the power management circuit 11. The static current of the power management circuit 11 is 1 - 2uA, ensuring that the power consumption of the sensor in the standby state is as low as possible. The sound and light alarm circuit 12 is used to control the buzzer. The communication circuit 14 is used to send the currently detected gas concentration information to the intelligent terminal when an alarm occurs. The intelligent terminal includes, but is not limited to: mobile phones, tablets, server backgrounds, etc. The wireless transmission circuit 13 is used to control the gas control valve to close and cut off the gas leakage source when the alarm is triggered. Among them, the power supply circuit 111 is connected to an external power supply to provide operating energy for the alarm. The reset circuit 112 is used to set the system to the initial state when starting. The crystal oscillator circuit 113 is used to generate an accurate clock signal. The LCD display circuit 15 is used to display the current gas concentration on the display screen after connecting to the display screen, so that the user can more intuitively understand the details. The operational amplifier circuit 18 is used to amplify the voltage signal fed back by the sensor by a predetermined multiple after the sensor is triggered, and then convert the voltage signal into a digital signal through the single-chip microcomputer 10, so as to facilitate the single-chip microcomputer 10 to judge the current gas concentration. The infrared receiving circuit 19 is used to receive the control signal sent by the infrared remote control to control the buzzer to stop working. Among them, the infrared remote control can only control the warning sound of the buzzer and cannot stop the light warning of the display screen.

[0036] It should be noted that for the circuits without circuit diagrams provided, reference can be made to the existing technology.

[0037] The specific working principle is that when the combustible gas concentration in the environment changes, the detection material of the sensor reacts chemically with the combustible gas to generate and output a weak voltage. The voltage value is amplified by a certain multiple through the operational amplifier circuit 18, and then collected by the ADC inside the single-chip microcomputer 10, and the value is converted into a digital signal and given to the single-chip microcomputer 10 for judgment. If the concentration value reaches 10% LEL, the single-chip microcomputer 10 controls the LCD display circuit 15 to light up the screen and display the current concentration. At the same time, the sound and light alarm circuit 12 also controls the buzzer to emit sound and light warnings. After the sound and light warning, the single chip microcomputer 10 turns on the wireless communication module circuit, uploads the information of the concentration exceeding the standard to the intelligent terminal, and informs the abnormal state of the concentration exceeding the standard. At the same time, the single chip microcomputer 10 controls the wireless transmission circuit 13 to control the gas control valve, and cuts off the continued leakage of gas in time to avoid causing greater losses; at this time, the infrared receiving circuit 19 will also be turned on, which is convenient for the warning object to use the infrared remote control for silencing. After the user performs silencing, the single chip microcomputer 10 controls the sensor circuit 17 to detect the combustible gas concentration value in the environment at a speed of 1S / time. When the combustible gas concentration value in the environment is detected to be lower than 10%LEL, the single chip microcomputer 10 will maintain a low-power dormant state, and at the same time, the power supply circuit 111 of the sensor will be changed to detect the combustible gas concentration in the environment at a speed of 20S / time, and all other peripherals will be powered off, leaving only the status indicator light to flash at an interval of 60S / time to display the working status of the alarm.

[0038] To summarize, this application significantly reduces the energy consumption of the alarm through the application of low-power sensors and microprocessors, allowing it to operate stably for a long time without frequent battery replacement. This design not only reduces the user's usage cost, but also improves the user experience; at the same time, the low-power sensor has the characteristics of high precision and high stability, and can accurately monitor the concentration of household gas. Even in the case of slight changes, it can quickly sense and respond. This feature ensures that gas leaks can be discovered in time and effectively avoid potential safety risks.

[0039] The present invention is not limited to what is described in the specification and implementation modes, and therefore, additional advantages and modifications can be easily realized by those familiar with the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. A low-power flammable gas alarm, characterized in that: include: Single chip microcomputer, power management circuit, sound and light alarm circuit, communication circuit, wireless transmission circuit, sensor circuit; The power management circuit, the sound and light alarm circuit, the communication circuit, the wireless transmission circuit and the sensor circuit are respectively connected to the single-chip microcomputer, the power management circuit is connected to an external power supply, the sound and light alarm circuit is connected to a buzzer, the communication circuit is used to send alarm information to an intelligent terminal, and the wireless transmission circuit is used to send control instructions to an external gas control valve.

2. The low-power consumption combustible gas alarm according to claim 1, characterized in that: The power management circuit comprises: a power supply circuit, a reset circuit, and a crystal oscillator circuit; the power supply circuit, the reset circuit, and the crystal oscillator circuit are respectively connected to the single chip microcomputer.

3. The low-power flammable gas alarm according to claim 1, characterized in that: Also includes: An LCD display circuit is connected to the single chip microcomputer and is also connected to a display screen for displaying the current gas concentration.

4. The low power consumption combustible gas alarm according to claim 1, characterized in that: The sensor circuit is also connected to an operational amplifier circuit, and the sensor circuit is connected to the single chip microcomputer via the operational amplifier circuit.

5. The low power consumption combustible gas alarm according to claim 1, characterized in that: Also includes: An infrared receiving circuit is connected to the single chip microcomputer and is also connected to an infrared remote controller.

6. The low-power consumption combustible gas alarm according to claim 3, characterized in that: The single chip microcomputer is also connected to an offline clock circuit, and the offline clock circuit is connected to the display screen for displaying time.

7. The low power consumption combustible gas alarm according to claim 1, characterized in that: The sensor is connected to a catalytic combustion type sensor.

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