CN220749853U - Gas leakage detection alarm system - Google Patents

Abstract

The utility model discloses a gas leak detection alarm system, which relates to the technical field of gas equipment, including a gas detection sensor, an ESP32 control board and an output relay. The ESP32 control board obtains the specific concentration value of the combustible gas through sampling by the gas detection sensor, controls the contact of the output relay to control the main power air switch of the leakage site, and then the ESP32 control board pushes the WeChat alarm signal through the WIFI network and relies on the Bafa Cloud Internet of Things platform, and the alarm signal pushes the alarm signal to the owner and the property at the same time. The utility model uses the Internet of Things platform WeChat to push alarm information to the owner and the property at the same time, which can effectively solve the situation where the communication distance is far and the owner is not on site. In addition, after the leak, the main power switch is actively cut off to prevent further expansion of the hazard and protect the safety of people's lives and property.

Description

A gas leak detection alarm system

Technical Field

The utility model relates to the technical field of gas equipment, in particular to a gas leakage detection and alarm system.

Background technique

As a household energy source, people do not have a deep understanding of natural gas. Unlike coal and gas, natural gas has a solid shape and a pungent smell. Natural gas is colorless and odorless. We cannot effectively and timely warn of natural gas leakage caused by pipeline aging and valves forgotten to be closed. However, this easily ignited and high-combustion-ratio substance will produce a strong explosion when it encounters an open flame in a closed space, which will endanger people's lives and property safety and cause a series of problems such as gas pipeline explosion. Based on this, a gas leak detection alarm system has appeared on the market, which is applied to daily gas use. Once the methane content exceeds the safe value, the alarm system starts working. However, all the safety devices on the market can only simply serve as a warning device. If people do not operate properly in the follow-up, there is still a possibility of gas explosion. For example, if people enter the house and turn on the lights directly without knowing it, the electric sparks generated will cause an explosion, which poses a huge safety hazard.

Utility Model Content

The utility model provides a gas leak detection alarm system, which aims to solve the problems existing in the background technology. It can not only remotely alarm multiple parties at the same time, but also actively cut off the main power supply of the leakage site to eliminate safety hazards.

To achieve the above purpose, the technical solution provided by the utility model is: a gas leak detection alarm system, including a gas detection sensor, an ESP32 control board and an output relay, wherein D0 of the gas detection sensor is connected to the IO port of the ESP32 control board, and A0 of the gas detection sensor is connected to the ADC channel of the ESP32 control board. When the concentration of the combustible gas is less than the specified threshold, DO outputs a high level, and when it is greater than the specified threshold, D0 outputs a low level. At the same time, the ADC channel of the ESP32 control board samples the analog signal of the gas detection sensor A0, and obtains the specific concentration value of the combustible gas through this analog signal. The coil of the output relay is controlled by the IO port of the ESP32 control board, and the contact of the output relay controls the main power air switch of the leakage site. The ESP32 control board pushes WeChat alarm signals through the WIFI network and relies on the Bafa Cloud Internet of Things platform. The alarm signal pushes the alarm signal to the owner and the property side at the same time, greatly shortening the time to discover the gas leak, and solving or finding countermeasures in the shortest time, effectively blocking the occurrence of subsequent dangers, and can also effectively solve the situation of long-distance restrictions such as business trips and travel of owners.

Preferably, the output relay is a sealed relay, the contacts of which are encapsulated inside the relay and have explosion-proof function.

Preferably, the gas detection sensor adopts an MQ-2 gas smoke sensor, which can detect a variety of combustible gases.

Preferably, the ESP32 control board is compiled using the Thonny+MicroPython development environment.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The IoT platform WeChat push alarm information function is used, and the alarm signal is sent to both the owner and the property management side at the same time, which can effectively solve the problem of long communication distance and the inability of the owner to handle it in time when he is not on site;

(2) After a leak occurs, the main power switch at the leak site is actively cut off to make the circuit at the leak site de-energized, thus fundamentally avoiding the risk of explosion caused by improper operation after the leak, preventing further expansion of the hazard, and protecting people's lives and property.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a functional block diagram of the present utility model;

Fig. 2 is a flowchart of the utility model.

Detailed ways

The present invention is further described in detail below in conjunction with specific embodiments.

The embodiment is given in Figure 1-2. A gas leak detection alarm system includes a gas detection sensor, an ESP32 control board, and an output relay. The D0 of the gas detection sensor is connected to the IO port of the ESP32 control board, and the A0 of the gas detection sensor is connected to the ADC channel of the ESP32 control board. When the concentration of the combustible gas is less than the specified threshold, DO outputs a high level, and when it is greater than the specified threshold, D0 outputs a low level. At the same time, the ADC channel of the ESP32 control board samples the analog signal of the gas detection sensor A0, and obtains the specific concentration value of the combustible gas through this analog signal. The coil of the output relay is controlled by the IO port of the ESP32 control board, and the contact of the output relay controls the main power air switch of the leakage site. The ESP32 control board pushes the WeChat alarm signal through the WIFI network and relies on the Bafa Cloud Internet of Things platform. First, create a topic in the Bafa Cloud console, send information through the ESP32 control board, so that the owner and the property end can receive the warning information in the first time, and then use the POST interface to configure various parameters such as uid, type, device, and msg, and verify it through Postman, and then finally realize the WeChat push warning function. When a gas leak is detected, an alarm signal is sent to the owner and the property management at the same time, which greatly shortens the time to discover the gas leak and solves or finds countermeasures in the shortest time possible, effectively blocking the occurrence of subsequent dangers. It can also effectively solve the problem of long-distance restrictions for owners such as business trips and travel.

In this embodiment, the output relay adopts a sealed relay, whose contacts are encapsulated in the relay, has explosion-proof function, is triggered by a small current, can control multiple contacts, switch AC or DC, and can operate well at high temperature. An indicator light is set on the bagpipe relay, green indicates no leakage, red indicates excessive leakage, and the leakage site has been disconnected, to prevent the owner from turning on the light when returning home without knowing it, causing electric sparks and explosions, which seriously affects personal and property safety.

In this embodiment, the gas detection sensor adopts MQ-2 gas smoke sensor, which can detect a variety of combustible gases, has high detection sensitivity for liquefied gas, propane, and hydrogen, and is also ideal for detecting natural gas and other combustible gases.

In this embodiment, the ESP32 control board is compiled using the Thonny+MicroPython development environment.

The working principle and use method of the utility model: When in use, the ESP32 control board collects the natural gas leakage and concentration information detected by the MQ-2 gas smoke sensor in real time. When the natural gas concentration exceeds the standard, the ESP32 control board drives the remote output relay to disconnect the air switch at the leakage site, so that the power is cut off within the leakage point range; at the same time, the ESP32 control board sends an alarm message through the Bafa Cloud Internet of Things platform, which is sent to the owner and the community property at the same time, and is sent by WeChat push. No matter where the owner is, he can get the news of the gas leak at the first time. If the owner is away and cannot rush home in time, the community property will also give a reasonable solution to prevent subsequent dangers.

The implementation methods of the present invention are not limited to the above-mentioned embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the protection scope of the present invention.

Claims (4)

1. A gas leak detection alarm system, characterized in that it includes a gas detection sensor, an ESP32 control board and an output relay, wherein the DO of the gas detection sensor is connected to the IO port of the ESP32 control board, and the A0 of the gas detection sensor is connected to the ADC channel of the ESP32 control board. When the concentration of the combustible gas is less than a specified threshold, DO outputs a high level, and when it is greater than the specified threshold, D0 outputs a low level. At the same time, the ADC channel of the ESP32 control board samples the analog signal of the gas detection sensor A0, and obtains the specific concentration value of the combustible gas through this analog signal; the coil of the output relay is controlled by the IO port of the ESP32 control board, and the contact of the output relay controls the main power air switch of the leakage site; the ESP32 control board pushes the WeChat alarm signal through the WIFI network and the Bafa Cloud Internet of Things platform, and the alarm signal is pushed to the owner end and the property end at the same time. 2. A gas leak detection alarm system according to claim 1, characterized in that: the output relay adopts a sealed relay, whose contacts are encapsulated in the relay and has an explosion-proof function. 3. A gas leak detection alarm system according to claim 1, characterized in that: the gas detection sensor adopts an MQ-2 gas smoke sensor, which can detect a variety of combustible gases. 4. A gas leak detection and alarm system according to any one of claims 1-3, characterized in that: the ESP32 control board is compiled using the Thonny+MicroPython development environment.