CN206741286U - SCM Based gas alarm processing unit - Google Patents

Abstract

The utility model discloses a kind of SCM Based gas alarm processing unit, its feature includes：The detection of gas modules of MQ 2, single chip processing module, gsm module, solenoid valve module；Indoor fuel gas concentration is detected by the sensor assemblies of MQ 2, and makes corresponding signal output, single chip processing module is handled signal, and driving gsm module sends warning message, drive magnetic valve module closing gas valve door.The leakage of the utility model energy real-time detection gas simultaneously closes valve in time, while sends warning message to householder, so as to ensure the safe handling of combustion gas.

Description

Gas alarm processing device based on single chip computer

technical field

The utility model relates to a gas use monitoring device, specifically a set of devices based on STC89C52 single chip microcomputer which can realize alarm information transmission and automatically close the gas valve when the gas leaks.

Background technique

At present, in terms of gas detection, there are many gas leak detection alarms on the market, and the detection is sensitive, and can detect various flammable and toxic gases such as methane, carbon monoxide, and hydrogen sulfide. On the other hand, on the control valve, the technology of detecting first and then responding has been realized, that is, when the gas leaks and reaches a certain concentration, the valve controlling the gas can close the gas valve to block the gas leakage. However, in real life, when using related dangerous gases, under the action of irregular operation or other unpredictable external factors, even under the condition that the gas valve can be closed, various unimaginable accidents often occur. Caused a lot of property damage and casualties. The occurrence of these problems is closely related to the inability to transmit information in time. When the user or the head of the household is not on site, when a dangerous situation occurs, the specific situation cannot be known at the first time, and effective measures cannot be taken, resulting in accidents.

Contents of the invention

In order to solve the shortcomings of the above-mentioned prior art, the utility model proposes a gas alarm processing device based on a single-chip microcomputer, in order to detect gas leakage in real time and close the valve in time, and at the same time send alarm information to the householder, thereby ensuring the safety of gas use.

The technical scheme that the utility model adopts for solving its technical problem is:

The characteristics of a gas alarm processing device based on a single-chip microcomputer in the utility model include: a gas detection module, a single-chip processing module, a GSM information transmission module, and a solenoid valve control module; the solenoid valve control module is composed of a normally closed solenoid valve and a relay ;

The gas detection module is an MQ-2 gas detector, and the MQ-2 gas detector detects the gas concentration leaked in the air in real time, and transmits the level signal of the pin to the single-chip processing module;

The single-chip processing module drives the GSM information sending module to send an alarm message to the mobile terminal according to the level signal received from the MQ-2 gas detector, and at the same time, drives the relay to disconnect the normally closed solenoid valve. valve.

The feature of the gas alarm processing device based on the single-chip microcomputer described in the utility model is also that the VCC and the GND of the MQ-2 gas detector are respectively connected to the working voltage of the single-chip processing module to make it energized;

The AD pin of the MQ-2 gas detector is an analog output pin, and is connected to the p1.0 pin of the single-chip microcomputer processing module for transmitting the level signal corresponding to the gas concentration; when the When the AD pin is at a high level, the single-chip processing module controls the power-off of the relay through the p1.0 pin, so that the normally closed solenoid valve is closed;

The DO pin of the MQ-2 gas detector is connected with the p3.4 pin of the single-chip processing module, and when the DO pin is low level, the p3.4 pin of the single-chip processing module drives the The GSM information sending module sends an alarm message.

The RXD receiving data pin of the GSM information sending module is connected with the p3.0 pin of the single-chip processing module, and is used to receive the sending instruction and content of the alarm message;

The TXD sending data pin of described GSM information sending module is connected with the p3.1 pin of described single-chip microcomputer processing module, is used for the sending state of feedback alarm short message; Described sending state passes 4 LEDs on the described single-chip processing module Light to show, wherein, LED1 represents that described single-chip microcomputer processing module is just sending alarm short message to described GSM information sending module; LED2 represents that described GSM information sending module receives the warning short message that described single-chip processing module sends; LED3 represents SIM card Register to the base station; LED4 indicates that the alarm message is sent successfully.

The output of the normally closed solenoid valve is DC24V-3.5A, which is input into a transformer directly connected to the AC power of 240V-50HZ in the family, so that the normally closed solenoid valve can work normally.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model is low in cost, low in power consumption, strong in practicability, and wide in application. It can detect in real time through the gas detection module, and can transmit alarm information in time through the GSM information sending module, so that people can know the dangerous situation at the first time. , and can automatically close the gas valve in time through the solenoid valve valve control module, avoiding the continuous leakage of gas, thus having double insurance measures, achieving the purpose of real-time monitoring of gas usage and effective handling of emergencies.

Description of drawings

Fig. 1 is the utility model device structure schematic diagram;

Fig. 2 is a flow chart of the gas alarm of the utility model.

detailed description

Referring to Figure 1, in this embodiment, a single-chip microcomputer-based gas alarm processing device is a device that uses MQ-2 detection, single-chip microcomputer processing, and TC-35 GSM to respond to solenoid valves, and is mainly used in gas safety protection for smart homes. , its composition includes: gas detection module, single-chip microcomputer processing module, GSM information sending module, solenoid valve control module; the solenoid valve control module is composed of normally closed solenoid valve and relay;

The gas detection module is composed of an MQ-2 gas detector. In the specific implementation, the MQ-2 gas detector is placed at the bottom of the kitchen gas stove. Whether the stove is leaking gas. The MQ-2 gas detector detects the concentration of gas leaked in the air in real time. When there is a gas leak and the concentration is greater than the set concentration range, MQ-2 quickly detects the leaked gas and turns it into a level signal, and transmits it through the pin. To the single-chip processing module, the single-chip processing module drives the GSM information sending module to send an alarm message to the mobile terminal according to the level signal received from the MQ-2 gas detector, and at the same time, drives the relay to disconnect the normally closed solenoid valve valve.

The MQ-2 gas detector is connected to the single-chip microcomputer to realize normal work. Connect the MQ-2 to the STC89C52 single-chip microcomputer, and the VCC and GND of the MQ-2 gas detector are respectively connected to the working voltage of the single-chip processing module to make it energized; due to the need to ensure that the gas The detection sensitivity of the detector, so when it is powered on, it cannot be made to work immediately, and it needs to be warmed up for about 5 minutes before it can normally detect dangerous gases leaking in the air.

The AD pin of the MQ-2 gas detector is an analog output pin and is connected to the p1.0 pin of the single-chip processing module to transmit the level signal corresponding to the gas concentration; when the AD pin is at a high level , the single-chip processing module controls the power-off of the relay through the p1.0 pin, so that the normally closed solenoid valve is closed; the valve is closed in time to block the leakage of gas. The purpose of not only transmitting the dangerous information in time but also closing the air valve in time is achieved.

The DO pin of the MQ-2 gas detector is connected to the p3.4 pin of the single-chip processing module. When the MQ-2 detects a dangerous gas and exceeds the preset concentration, the DO port generates a low-level signal, which passes through P3.4 The pin outputs a low-level signal to the single-chip microcomputer. After the single-chip microcomputer receives the signal, under the action of the preset program, it drives the GSM information sending module to send an alarm message to the preset number.

As shown in Figure 2, it is the flow chart of the control program of SMS alarm. The GSM information sending module realizes its function through the program. When there is no gas leakage or the concentration is low, the program of sending alarm SMS is not executed; When the gas reaches the set concentration, the MQ-2DO output terminal sends a level signal to the microcontroller through the p3.4 interface, and the microcontroller drives the GSM to send a text message to the mobile phone.

Referring to Figure 1, on the circuit connection between the GSM information sending module and the single-chip microcomputer, use 3 DuPont lines to realize the connection between GSM and the single-chip microcomputer, namely GND, RXD, and TXD. The input of MCU is 5V, and the input of GSM is 12V, so they must have a common ground. In addition, RXD is the pin for receiving data, and TXD is the pin for sending data. The RXD receiving data pin of the GSM information sending module is connected with the p3.0 pin of the single-chip processing module, and is used to receive the alarm message sent from the single-chip microcomputer. instructions and content;

The TXD sending data pin of the GSM information sending module is connected with the p3.1 pin of the single-chip microcomputer processing module, which is used to feed back the sending status of the alarm message; when the single-chip microcomputer receives the low-level signal from MQ-2, it triggers the Send alarm SMS function. The sending status is displayed by 4 LED lights on the single-chip processing module, wherein, LED1 represents that the single-chip processing module is sending an alarm note to the GSM information sending module; LED2 indicates that the GSM information sending module receives the alarm note that the single-chip processing module sends ; LED3 indicates that the SIM card is registered to the base station; LED4 indicates that the alarm message is sent successfully. At this time, the mobile terminal will receive an alarm message.

See Figure 1. In the circuit system of the solenoid valve and the single-chip microcomputer, the normally closed solenoid valve is selected. The working condition of the normally closed solenoid valve is DC24V-2.5A. One output is DC24V-3.5A, and the input is directly connected to The family's 240V-50HZ AC transformer makes the normally closed solenoid valve work normally. The connection method is to connect one end of the two wires in the transformer with one wire of the solenoid valve, and at the other end, connect the other wire of the transformer and the solenoid valve to the control switch of the relay, so that the relay can control the entire current. On-off, when MQ-2 detects gas leakage, the microcontroller receives the analog voltage output from MQ-2, triggers the relay to work, cuts off the current, and then closes the electromagnetic valve to prevent gas leakage.

Claims (2)

1. a kind of SCM Based gas alarm processing unit, it is characterized in that including：Gas detection module, single-chip microcomputer processing mould Block, GSM information sending module, magnetic valve valve control module；The electromagnetic valve control module by normally closed solenoid valve and after Electrical equipment is formed；

The gas detection module is MQ-2 detectors, and the MQ-2 detectors detect the combustion leaked in air in real time Gas concentration, and single chip processing module is transmitted to by the level signal of pin；

The level signal that the single chip processing module transmits according to the MQ-2 detectors received, driving GSM information hair Module is sent to send alarming short message to mobile terminal, meanwhile, drive the relay to disconnect the valve of the normally closed solenoid valve；

The operating voltage that the VCC and GND of the MQ-2 detectors are respectively connected to the single chip processing module makes its energization；

The AD pins of the MQ-2 detectors are analog output pin, and are drawn with the p1.0 of the single chip processing module Pin is connected, for transmitting the level signal corresponding to the gas concentration；When the AD pins are high level, the single-chip microcomputer Processing module controls the relay to power off by p1.0 pins, so that the normally closed solenoid valve closes；

The DO pins of the MQ-2 detectors are connected with the p3.4 pins of the single chip processing module, when the DO pins For low level when, the p3.4 pins of the single chip processing module drive the GSM information sending module to send alarming short message；

The RXD of the GSM information sending module receives data pin and is connected with the p3.0 pins of the single chip processing module, uses In the transmission instruction and content that receive alarming short message；

The TXD of the GSM information sending module sends data pin and is connected with the p3.1 pins of the single chip processing module, uses In the transmission state of feedback alarm short message；The transmission state is shown by 4 LEDs in the single chip processing module Show, wherein, LED1 represents that the single chip processing module is just sending alarming short message to the GSM information sending module；LED2 tables Show that the GSM information sending module receives the alarming short message that the single chip processing module is sent；LED3 represents SIM card registration To base station；LED4 represents that alarming short message is sent successfully.

2. SCM Based gas alarm processing unit according to claim 1, it is characterized in that, the normally closed type electromagnetism The output of valve is DC24V-3.5A, and input is directly accessed the transformer of the 240V-50HZ of family alternating current so that described normally closed Formula magnetic valve normal work.