CN210039020U

CN210039020U - Fire smoke temperature alarm system

Info

Publication number: CN210039020U
Application number: CN201920482610.8U
Authority: CN
Inventors: 江玲
Original assignee: Hubei Institute Of Technology
Current assignee: Hubei Institute Of Technology; Hubei Polytechnic University
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2020-02-07
Anticipated expiration: 2029-04-10

Abstract

The utility model discloses a conflagration smog temperature alarm system, including single chip microcomputer unit and respectively with single chip microcomputer unit electric connection's temperature sensor, smoke transducer, liquid crystal display and alarm, single chip microcomputer unit adopts STC89C52 singlechip, smoke transducer passes through the AD converter and connects STC89C52 singlechip, be provided with the alarm lamp that is used for the temperature early warning and is used for the smog concentration early warning on the alarm. The utility model has the advantages that: the user passes through temperature sensor instant detection temperature, detects smog concentration through smog sensor instant, can discover indoor conflagration immediately, and the buzzer reports to the police, in time informs the user to handle, avoids causing great loss.

Description

Fire smoke temperature alarm system

Technical Field

The utility model belongs to the technical field of the intelligent house technique and specifically relates to a conflagration smog temperature alarm system is related to.

Background

In the family life, fire accidents happen sometimes, the fire department counts the proportion of the fires in various places, the proportion of the family fires is about 30%, and accordingly the family fires threaten the happy life more and cause great loss. If the alarm sound can be sounded in time when a fire just occurs, more time can be given to people to process the fire, and the loss caused by the fire is reduced. In the investigation of the causes of fire, many people pay little attention to the prevention of fire and do not install a fire alarm system and related fire extinguishing devices.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned technique not enough, provide a conflagration smog temperature alarm system, solve the problem of mentioning among the above-mentioned background art. .

The utility model discloses a technical scheme provide a conflagration smog temperature alarm system, including single chip microcomputer unit and respectively with single chip microcomputer unit electric connection's temperature sensor, smoke transducer, liquid crystal display and alarm, single chip microcomputer unit adopts STC89C52 singlechip, smoke transducer passes through AD converter ADC0832 and connects STC89C52 singlechip, be provided with the alarm lamp that is used for the temperature early warning and is used for the smog concentration early warning on the alarm.

The utility model has the advantages that: the user passes through temperature sensor instant detection temperature, detects smog concentration through smog sensor instant, can discover indoor conflagration immediately, and the buzzer reports to the police, in time informs the user to handle, avoids causing great loss.

Drawings

Fig. 1 is a control schematic diagram of the present invention;

fig. 2 is a schematic diagram of the pins of the STC89C52 single chip microcomputer of the present invention;

fig. 3 is a schematic diagram of a reset circuit according to the present invention;

FIG. 4 is a schematic diagram of a clock circuit according to the present invention;

fig. 5 is a schematic circuit diagram of the alarm of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Please refer to fig. 1-5 simultaneously, the utility model discloses a technical scheme provide a fire smoke temperature alarm system, including single chip unit to and respectively with single chip unit electric connection's temperature sensor, smoke transducer, liquid crystal display and alarm.

The single chip unit adopts an STC89C52 single chip microcomputer, the STC89C52 single chip microcomputer is provided with a 256-bit data memory and an 8 k-bit repeatedly erasable program memory, and the repeatedly erasable program memory comprises 40 pins (32 external I/O ports capable of being input and output, 2 programmable timing counters, 2 read-write interfaces, 2 external fractures and 2 communication ports), when the single chip microcomputer is driven, a driving program of the repeatedly erasable program memory can be modified on line, and the operation is very convenient, the main control module circuit adopts a circuit in an internal clock mode, the input end of a clock circuit is an XTAL1 pin, the output end of the clock circuit is an AL XT 2 pin, a crystal oscillator and a fine adjustment circuit formed by two capacitors are connected between the two pins, the parts form a self-oscillation circuit with stable operation, the circuit is selected to be a key manual reset circuit, and the reset circuit is connected with an RST pin on the STC89C52 single chip microcomputer, when the user makes the RST pin high through an external circuit, the reset circuit may reset STC89C52, STC89C52 starts operating from the initial state.

The temperature sensor adopts DS18B20, and the writing and reading interfaces of the temperature sensor only need to be connected with the I/O port of the singlechip by a communication line, so that the DQ port is connected with P1.0. The temperature sensor detects temperature data of the surrounding environment, the temperature data are output through a DQ port and input into the single chip microcomputer through a P1.0 port, the single chip microcomputer is compared with a preset value, if the temperature data are higher than the preset value, the alarm is started to carry out sound-light alarm, and otherwise, the normal state is realized. The data output by the DS18B20 temperature sensor is data with protocol, is not an analog quantity, can be communicated with the single chip microcomputer to directly send and receive temperature data, and does not need to pass through an A/D converter.

The smoke sensor adopts MQ-2, and the MQ-2 type smoke sensor is made of tin dioxide semiconductor gas-sensitive material which can react with oxygen at high temperature. Under the general condition, when the temperature is 200-300 ℃, the material can react with oxygen to generate oxygen anions, namely the electron density of the material is reduced, the conductivity is poor, and the resistance of the material is increased; when smoke is contained in the environment, namely the oxygen content is reduced, the chemical reaction of the material and the oxygen is weakened, the electron density is correspondingly increased, the conductivity is enhanced, the generated current signal is increased, and the output of the smoke sensor is increased accordingly. Therefore, according to the above principle, the output of the smoke sensor increases as the concentration of smoke increases. The smoke sensor detects that surrounding information (combustible gas and smoke) is analog quantity, so the information can be identified by the singlechip only after being converted into digital signals through the A/D converter, the smoke sensor detects the concentration of the smoke, the analog signals (the smoke concentration) are converted into digital signals (the digital signals can be identified by the singlechip) through the A/D converter ADC0832 chip, the digital signals are transmitted into the singlechip for identification, the digital signals are compared with preset values after being processed and analyzed by the singlechip, if the analog signals are larger than the preset values, the alarm circuit is started to send out acousto-optic alarm, and otherwise, the normal state is realized.

The liquid crystal display screen adopts the LCD1602, and the temperature and the smog concentration of the surrounding environment that liquid crystal display screen detected with temperature sensor and smoke transducer show, and LCD1602 is the double-row demonstration, can be clear demonstration smog concentration and temperature value simultaneously.

The alarm is used for sound and light alarm, please refer to fig. 5 at the same time, the alarm is provided with two alarm lamps, namely a yellow Lamp (LEDY) for temperature early warning and a red Lamp (LEDR) for smoke concentration early warning, if the temperature and the smoke concentration are within a safe range, the two lamps are both turned off, and the buzzer is silent; if the temperature exceeds the preset value, the yellow lamp is lightened, and the buzzer gives an alarm; if the smoke concentration exceeds the preset value, the red light is lightened, and the buzzer gives an alarm. In this embodiment, the alarm is connected to the user's mobile phone through a network, and the buzzer sends an alarm signal to the user's mobile phone while giving an alarm, so that the user can process the alarm in time.

Among the above-mentioned technical scheme, the utility model discloses a theory of operation: when a user uses the liquid crystal display screen, the temperature sensor is used for detecting the temperature in real time, the smoke sensor is used for detecting the smoke concentration in real time, the real-time temperature and the smoke concentration are displayed on the liquid crystal display screen in real time, and if the temperature and the smoke concentration are within a safety range, the buzzer is silent; if the temperature exceeds the preset value, the yellow lamp is lightened, and the buzzer gives an alarm; if the smoke concentration exceeds the preset value, the red light is lightened, and the buzzer gives an alarm to remind a user of safety.

Compared with the prior art, the beneficial effects of the utility model are that: the user passes through temperature sensor instant detection temperature, detects smog concentration through smog sensor instant, can discover indoor conflagration immediately, and the buzzer reports to the police, in time informs the user to handle, avoids causing great loss.

The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A fire smoke temperature warning system, comprising: singlechip unit and respectively with singlechip unit electric connection's temperature sensor, smoke transducer, liquid crystal display and alarm, the singlechip unit adopts STC89C52 singlechip, smoke transducer passes through AD converter ADC0832 and connects STC89C52 singlechip, be provided with the alarm lamp that is used for the temperature early warning and is used for the smog concentration early warning on the alarm.

2. A fire smoke temperature alarm system according to claim 1 wherein the temperature sensor is DS18B 20.

3. A fire smoke temperature alarm system according to claim 1 wherein the smoke sensor employs MQ-2.