CN215643011U - Fire early warning system based on sound wave acquisition - Google Patents

Abstract

The utility model discloses a fire early warning system based on sound wave acquisition, which relates to the field of fire alarm systems and comprises a main control module and a data communication module, wherein the main control module is electrically connected with the data communication module, the fire early warning system also comprises a sound wave acquisition module, the main control module is electrically connected with the sound wave acquisition module, the sound wave acquisition module is used for acquiring sound wave signals and transmitting the sound wave signals to the main control module, and the sound wave acquisition module comprises two paths of IIC bus interfaces, two paths of SPI bus interfaces and an AD (analog-to-digital) conversion interface. The system is mainly used for fire early warning under different environmental conditions, detects different sound wave signals of the external environment, and combines the procedural control of the single chip microcomputer to realize the effect of real-time monitoring on the fire condition of the required environment.

Description

Fire early warning system based on sound wave acquisition

Technical Field

The utility model relates to the field of fire alarm systems, in particular to a fire early warning system based on sound wave acquisition.

Background

In social life, a fire disaster is one of disasters threatening public safety and endangering lives and properties of people, and is the most frequent disaster among various disasters, and the fire disaster is a common disastrous problem facing people of all countries in the world due to extremely high occurrence frequency, wide damage and high destructiveness. Alarm device among the prior art often comprises smoke detector and alarm device, and smoke detector sensing when having smog to produce among the fire alarm device can trigger alarm device and send out the police dispatch newspaper sound, but during this kind of detection mode, often the fire that has been accompanied by has taken place, and the control person is too late to rescue when arriving the scene, can't play the condition of a fire and predict the effect in advance, and on the other hand, this detection device uses in airtight space usually, and the scope of use is more restricted, can not be applied to the condition of a fire that detects in the great scope.

Disclosure of Invention

In order to solve the technical problems in the background art, the utility model provides a fire early warning system based on sound wave acquisition, which can prejudge the fire in advance and has wide application range.

The utility model adopts the following technical scheme: the utility model provides a conflagration early warning system based on sound wave is gathered, includes host system and data communication module, host system is connected with the data communication module electricity, still includes sound wave collection module, host system is connected with sound wave collection module electricity, sound wave collection module is used for gathering the sound wave signal and transmits to host system, sound wave collection module includes two-way IIC bus interface, two-way SPI bus interface and AD analog-to-digital conversion interface.

As an optimized scheme, the two-path IIC bus interface is electrically connected with the main control module and used for providing an acquisition interface for the sound wave sensor based on the IIC protocol and transmitting acquired sound wave signals to the main control module;

the two paths of SPI bus interfaces are electrically connected with the main control module and are used for providing an acquisition interface for the sound wave sensor based on the SPI protocol and transmitting acquired sound wave signals to the main control module;

the AD analog-to-digital conversion interface is electrically connected with the main control module and used for providing a collection interface for the sound wave sensor of the analog voltage and transmitting collected sound wave signals to the main control module.

As an optimization scheme, the system further comprises an upper computer, and the main control module transmits the collected sound signals to the upper computer through a data communication module.

As an optimization scheme, the data communication module is based on a UART serial port communication module, the data communication module comprises an Ethernet communication module, a wireless LORA communication module and a level conversion module based on a MAX232 chip, and the Ethernet communication module, the wireless LORA communication module and the level conversion module based on the MAX232 chip are respectively electrically connected with the main control module.

As an optimization scheme, the temperature control device further comprises a temperature acquisition module, wherein the main control module is electrically connected with the temperature acquisition module, and the temperature acquisition module is a DS18B 20-based temperature sensing chip and is used for acquiring temperature data in the environment and transmitting the environment temperature data to the main control module.

As an optimization scheme, the system further comprises an instruction input module and a signal output module, wherein the main control module is respectively electrically connected with the instruction input module and the signal output module, the instruction input module adopts a five-direction key signal circuit and is used for inputting a control instruction to the main control module, selecting, adjusting, setting and controlling a system menu through dialing and controlling five-direction keys and displaying the system menu on the signal output module.

As an optimization scheme, the signal output module adopts an LCD1602 liquid crystal display screen for displaying system parameter values and fire condition state information, and a data end of the LCD1602 liquid crystal display screen is electrically connected with the main control module for realizing transmission of display data or commands.

As an optimized scheme, the intelligent warning device further comprises an LED indicating lamp circuit unit, wherein the LED indicating lamp circuit unit is electrically connected with the main control module and used for sending out an early warning signal; the LED indicating lamp circuit unit comprises a plurality of LED indicating lamp combinations, and the LED indicating lamp circuit unit controls the on and off of the LED indicating lamp combinations.

As an optimization scheme, the system further comprises a Beidou positioning module, wherein the Beidou positioning module is electrically connected with the main control module and adopts an S1216F8-BD chip for marking the position of the system and transmitting position data to the main control module.

As an optimization scheme, the system further comprises a CAN bus communication circuit, wherein the CAN bus communication circuit is electrically connected with the main control module, and comprises an SJA1000 communication control chip and a TJA1050T driving chip which are used for providing a networking interface for the system.

Compared with the prior art, the utility model has the advantages that:

the device realizes the effect of real-time monitoring of the fire condition of the required environment by externally connecting sound wave sensors with different frequencies, detecting sound wave signals of the external environment and combining the programmed control of a single chip microcomputer, the detection result is more accurate, a monitor can pre-judge before the fire through data fed back by the sound wave signals, and the loss of personnel and property caused by the fire is reduced to a certain extent, in addition, the system can detect the fire condition of different external environments by connecting different types of data communication modules through the single chip microcomputer STC89C52, the environment application range is wider, the requirements of various environmental conditions can be met, meanwhile, the Beidou positioning module matched with the system can play a positioning role more accurately, the monitor can position the fire scene in time, the system has a simple structure and better system reaction capability, is convenient to use.

Drawings

FIG. 1 is a frame diagram of the present invention;

FIG. 2 is a schematic diagram of a frame of the acoustic wave collection module of the present invention;

FIG. 3 is a schematic diagram of a frame of an IO port expansion circuit module according to the present invention;

FIG. 4 is a schematic diagram of a frame of a serial port expansion circuit module according to the present invention;

FIG. 5 is a partial circuit diagram of the main control module according to the present invention;

FIG. 6 is a schematic circuit diagram of a part of the serial port expanding circuit module according to the present invention;

FIG. 7 is a schematic circuit diagram of a portion of an IO port expansion circuit module according to the present invention;

the intelligent electronic device comprises a 1-sound wave acquisition module, a 2-signal output module, a 3-instruction input module, a 4-LED indicator lamp circuit unit, a 5-data communication module, a 51-Ethernet communication module, a 52-wireless LORA communication module, a 53-level conversion module, a 6-main control module, a 7-pin externally-expanded double-pin module, an 8-IO port expansion circuit module, a 9-serial port expansion circuit module, a 10-temperature acquisition module, an 11-IIC bus interface, a 12-SPI bus interface, a 13-AD analog-to-digital conversion interface, a 14-Beidou positioning module and a 15-CAN bus communication circuit.

Detailed Description

Hereinafter, in order to facilitate the technical solution of the present invention for those skilled in the art to understand, further description will be made with reference to the accompanying drawings. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention.

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the utility model. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1, a frame schematic diagram of an embodiment of the utility model is a fire early warning system based on sound wave collection, and the fire early warning system includes a main control module 6, where the main control module 6 includes a core control unit constructed by an STC89C52 single chip microcomputer chip, and is used for externally connecting and controlling operations of circuit modules of the system, and STC89C52 is a low-power-consumption and high-performance CMOS 8-bit microcontroller produced by STC company, and has an 8 kbyte system programmable Flash memory. The pin outward-expanding double-row pin module 7 is welded on two sides of a single chip microcomputer STC89C52, the pin outward-expanding double-row pin module 7 is composed of two 20-pin double-row pins P1 and P2, the P1 is welded on the left side of the single chip microcomputer, the P2 is welded on the right side of the single chip microcomputer, the P1 is close to the 1 st row on the left side of the single chip microcomputer and is connected with the 20 pins on the left side of the single chip microcomputer, the 20 pins on the left side of the single chip microcomputer are extended and led out, the P2 is close to the 1 st row on the right side of the single chip microcomputer and is connected with the 20 pins on the right side of the single chip microcomputer, and the 20 pins on the right side of the single chip microcomputer are extended and led out. The 2 nd row on the left side of P1 and the 2 nd row on the right side of P2 are electrically connected with the expanded IO port expansion circuit 8, the serial port expansion circuit module 9 and the sound wave acquisition module 1, and the 1 st row and the 2 nd row of P1 and P2 can be connected through a jumper cap or a DuPont wire, so that the pins of the modules expanded outside the 2 nd row can be connected with the pins of the single chip microcomputer.

The IO port expansion circuit 8 is electrically connected with pins P00-P07 in the single chip microcomputer pin externally-expanded double-pin module P1, the IO port expansion circuit 8 adopts an interface chip 8255 to expand the P0 port of the STC89C52 single chip microcomputer into three ports PA, PB and PC, and the three ports PA, PB and PC are respectively and electrically connected with the signal output module 2, the instruction input module 3 and the LED indicator lamp circuit unit 4.

The serial port expansion circuit module 9 is electrically connected with P30-P31 pins in a single chip microcomputer pin outward expansion double-pin module P2, a VK32 series multi-bus UART serial port expansion chip is adopted by a four-serial port expansion circuit, a serial port of STC89C52 is expanded into four communication module interfaces including receiving pins RX 1-RX 4 and sending pins TX 1-TX 4, and the serial port expansion circuit module 9 is electrically connected with the data communication module 5.

Sound wave collection module 1 is connected with singlechip pin external expansion double row needle module 7 electricity, sound wave collection module 1 is used for the external sound wave sensor who gathers different frequency sound wave signals, sound wave collection module 1 is with the sound wave signal transmission of gathering to host system 6, sound wave collection module 1 is equipped with abundant external sensor interface, the supervisor can select to use different interfaces through instruction input module 3, sound wave collection module 1 includes two-way IIC bus interface 11, two-way SPI bus driven acquisition circuit interface 12, and be responsible for gathering analog signal and converting into digital signal's 11 way 12 AD analog-to-digital conversion interfaces 13. The two-way IIC bus interface 11 is respectively electrically connected with pins P24-P25 and pins P34-P35 in the single chip microcomputer pin externally-expanded double-row pin module P2, the two-way SPI bus interface 12 is electrically connected with pins P10-P13 and pins P14-P17 in the single chip microcomputer pin externally-expanded double-row pin module P1, and the AD analog-to-digital conversion interface 13 is electrically connected with pins P20-P23 in the single chip microcomputer pin externally-expanded double-row pin module P2. The sound wave acquisition module 1 can acquire sound wave signals with different frequencies released in an external environment, the acquired signals are transmitted to the main control module 6, and the main control module 6 is in information communication with an upper computer through the data communication module 5.

The upper computer is internally provided with a sound wave signal detection mechanism which simulates the received sound wave signals and establishes a quantitative analysis model in the statistical analysis sense, such as a module analysis model integrating Fourier operation and analysis, the mechanism analyzes and determines the fluctuation rule of the sound wave released in real time in the external environment, the corresponding sound wave model before the fire disaster occurs under different environments is fitted through the analysis model and the rule, a sound wave threshold characteristic database under different environments established through the analysis model is prestored in the memory of the upper computer, and then the coupling association of the fire disaster and the sound wave change is established. Before a fire disaster occurs, sound waves emitted by the air of an external environment can cause an external sound wave sensor to generate changed micro voltage, the voltage can be converted into an available output signal, the sound wave sensor converts detected sound waves into sound wave signals to be sent to the main control module 6, the sound wave signals are transmitted to an upper computer through the main control module 6 to be detected, a sound wave signal detection mechanism carries out noise reduction pretreatment on the sound wave signals according to the received sound wave signals, then characteristic extraction is carried out, characteristic quantity is output, a sound wave threshold characteristic database stored in a memory of the upper computer in advance is compared, and therefore whether the external environment has the symptom of the fire disaster or not is judged.

The instruction input module 3 is electrically connected with PB 3-PB 7 pins in the IO port expansion circuit module 8, the instruction input module 3 adopts a five-direction key signal circuit for inputting a control instruction to the main control module 6, and can realize selection of "enter", "left", "right", "up", "down" confirmation "," exit "and the like of a host menu by dialing and controlling five-direction keys, adjust and set a data communication mode, system parameters and the like of a system, thereby realizing effective control of the system.

The signal output module 2 adopts an LCD1602 liquid crystal display, the connection circuit between the LCD1602 and the single chip microcomputer is simple, the LCD1602 liquid crystal display is electrically connected with the IO port expansion circuit 8, and the data end of the LCD1602 liquid crystal display is electrically connected with pins PA 0-PA 7 of the IO port expansion circuit 8 and used for realizing the transmission of display data or commands. The command data terminal RS, the read-write terminal RW and the enable terminal E of the LCD1602 LCD are electrically connected to PB0 to PB2 of the IO port expansion circuit 8, respectively. When the system is started, the enable E is changed from high level to low level, and the LCD1602 is powered on as data output. The LCD1602 display screen is divided into two lines for displaying 16 characters, the first line is used for displaying the working state of the system, the second line is used for displaying the ambient fire condition, and the LCD1602 liquid crystal display screen respectively displays that Alam (danger-30%) of the system works normally-30%, Alam (danger-50%) of the system works normally-50%, Alam (danger-100%) of the system works normally-100%. When the operator operates to select the system working mode, such as selecting different data communication modes, the display screen displays the instruction input condition according to the operation of the operator.

The LED indicating lamp circuit unit 4 is electrically connected with pins PC 0-PC 7 of the IO port expansion circuit 8 and used for sending out early warning signals, the LED indicating lamp circuit unit 4 comprises a plurality of LED indicating lamp combinations, preferably 8 LED indicating lamps, and the LED indicating lamp circuit unit 4 gives out different fire early warning signals by controlling the on and off of the 8 LED indicating lamp combinations. 8 LED pilot lamps include 1 operating condition lamp respectively, 2 mild signal lamps, 2 moderate signal lamps, 2 severe fire signal lamps and 1 search signal lamp. When the system works normally, the working state lamp is on, and the other lamps are off; when slight fire alarm early warning takes place, operating condition lamp and 2 slight signal lamps are bright, analogize in proper order, and the search signal lamp is used for appearing fire alarm early warning or the system need be maintained the time bright, is convenient for the control person to search for the system position and use.

The data communication module 5 is a UART-based serial port communication module, the data communication module 5 is electrically connected with the main control module 6 and the upper computer respectively, and is used for satisfying data interaction between the two, the data communication module 5 comprises an ethernet communication module 51, a wireless LORA communication module 52 and a level conversion module 53 based on a MAX232 chip, wherein the ethernet communication module 51 is electrically connected with a receiving pin RX1 and a sending pin TX1 of the serial port expansion circuit module 9; the wireless LORA communication module 52 is electrically connected to the receiving pin RX2 and the sending pin TX2 of the serial port expansion circuit module 9 to implement wireless networking communication of the system; the level shift module 53 based on the MAX232 chip is electrically connected to the receive pin RX3 and the transmit pin TX3 of the serial port expansion circuit module 9. The level conversion module 53 of the MAX232 chip is also used for communicating the upper computer with the single chip microcomputer, so that programs in the upper computer can be conveniently downloaded into the single chip microcomputer.

Further, the system further comprises a CAN bus communication circuit 12, wherein the CAN bus communication circuit 12 comprises an SJA1000 communication control chip and a TJA1050T driving chip, and the CAN bus communication circuit 12 is electrically connected with pins P00-P07, ALE, P27 and P36 of the pin extension double-pin module 7 and is used for providing a networking interface for the system.

The monitor can determine the number of the devices to be configured according to the environment range, and select which data communication module to use. When the system is applied to a single closed space with a small area, if the system is used for early warning the fire condition of a family environment, only one device needs to be installed in the environment, and a monitor can select a communication mode of using a level conversion module based on an MAX232 chip to receive and transmit data through the instruction input module 3; when the system is applied to environment spaces between floors with large area, such as office buildings, factories and the like, a monitor can be matched with a plurality of devices to form local area network communication, and the instruction input module 3 selects a communication mode using the Ethernet communication module 51 to receive and transmit data; when the area is very big, for example when applying to environment such as forest, mine, based on the circumstances of environment, the control person can support a plurality of this devices according to actual conditions to select to use through instruction input module 3 and carry out data reception and data transmission based on wireless LORA communication module 52 communication mode. In addition to the above three communication methods, the monitor CAN select the CAN bus communication circuit 12 as the default communication method of the present system for data reception and data transmission.

This system is equipped with big dipper orientation module 14, big dipper orientation module 14 electricity is connected serial ports and is extended receiving pin RX4 and sending pin TX4 of circuit module 9, big dipper orientation module 14 adopts S1216F8-BD chip, provide positional information for the system, big dipper orientation module 14 sends the position signal that the system is located to host system 6 through real-time, transmit position signal to the host computer by host system 6, the host computer receives and analyzes position signal, thereby effectual definite system position condition, when the condition of a fire early warning or the system equipment overhauls appear, big dipper orientation module 14 can assist LED pilot lamp unit 41, provide more accurate positional information for the monitor.

For better detection environment condition of a fire, this system is equipped with temperature acquisition module 10, temperature acquisition module 10 is based on DS18B20 temperature-sensing chip, temperature acquisition module 10 is connected with the P26 pin electricity of pin flaring double row needle module 7, be arranged in gathering the temperature data in the environment, and to main control module 6 transmission ambient temperature data, main control module 6 transmits received temperature data to the host computer, the host computer receives temperature data and compares with the temperature threshold value of predetermineeing in the memory, when temperature data exceedes predetermined threshold value, the host computer will send early warning signal to main control module 6, main control module 6 converts early warning signal into early warning instruction and transmits to LED pilot lamp unit 41, send corresponding early warning signal according to the early warning instruction by LED pilot lamp unit 41.

Furthermore, a power module of the system adopts a USB power interface converting 220V into 5V and a voltage stabilizing chip AMS1117-3.3 converting 5V into 3.3V.

The working principle of the system is that the system is placed in an environment needing to be detected, the system is started, and the LED indicating lamp circuit unit 41 controls the working state lamp to be on. The monitor selects a proper data communication mode through the instruction input module 3 according to different environments, sound wave signals in the environments are collected through the sound wave collection module 1 which is externally connected with different sound wave sensors, the sound wave collection module 1 transmits the collected sound wave signals to the upper computer through the main control module 6, the sound wave signals are detected by the sound wave signal detection mechanism of the upper computer and compared with a sound wave threshold value characteristic database in a memory of the upper computer, when the collected sound wave signal value exceeds the sound wave threshold value, the upper computer transmits graded early warning signals to the main control module 6 according to the exceeding range, the main control module 6 converts the received early warning signals into control instructions which are transmitted to the LED indicating lamp circuit unit 4 on one hand, the LED indicating lamp circuit unit 4 controls the LED indicating lamp group to display different numbers of on and off so as to achieve the effect of reminding the monitor of the emergency degree of fire, on the other hand, the main control module 6 transmits the control instructions to the LCD1602, the display screen displays different early warning contents according to the instructions. In addition, big dipper orientation module 14 real-time transmission system position signal to host system 6, host system 6 with position signal transmission to the host computer, the supervisor will be according to the system position signal that shows in the host computer, the position of accurate judgement conflagration early warning to effectual accomplish to predict in advance and accurate location, reduced personnel and property loss that the conflagration leads to a certain extent.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims (10)

1. The utility model provides a fire early warning system based on sound wave is gathered, includes host system (6) and data communication module (5), host system (6) are connected its characterized in that with data communication module (5) electricity: the sound wave collection module is characterized by further comprising a sound wave collection module (1), the main control module (6) is electrically connected with the sound wave collection module (1), the sound wave collection module (1) is used for collecting sound wave signals and transmitting the sound wave signals to the main control module (6), and the sound wave collection module (1) comprises two paths of IIC bus interfaces (11), two paths of SPI bus interfaces (12) and an AD analog-to-digital conversion interface (13).

2. The fire early warning system based on sound wave collection according to claim 1, wherein:

the two paths of IIC bus interfaces (11) are electrically connected with the main control module (6) and are used for providing acquisition interfaces for the sound wave sensor based on the IIC protocol and transmitting acquired sound wave signals to the main control module (6);

the two-path SPI bus interface (12) is electrically connected with the main control module (6) and is used for providing an acquisition interface for the sound wave sensor based on the SPI protocol and transmitting acquired sound wave signals to the main control module (6);

the AD analog-to-digital conversion interface (13) is electrically connected with the main control module (6) and used for providing a collection interface for the sound wave sensor of the analog voltage and transmitting collected sound wave signals to the main control module (6).

3. The fire early warning system based on sound wave collection according to claim 1, wherein:

the voice monitoring system is characterized by further comprising an upper computer, wherein the main control module (6) transmits the collected voice signals to the upper computer through the data communication module (5).

4. The fire early warning system based on sound wave collection according to claim 1, wherein: the data communication module (5) is based on a UART serial port communication module, the data communication module (5) comprises an Ethernet communication module (51), a wireless LORA communication module (52) and a level conversion module (53) based on a MAX232 chip, and the Ethernet communication module (51), the wireless LORA communication module (52) and the level conversion module (53) based on the MAX232 chip are respectively electrically connected with the main control module (6).

5. A fire early warning system based on sound wave collection according to claim 3, wherein: still include temperature acquisition module (10), host system (6) are connected with temperature acquisition module (10) electricity, temperature acquisition module (10) are for DS18B20 based temperature-sensing chip for temperature data in the collection environment, and to host system (6) transmission ambient temperature data.

6. The fire early warning system based on sound wave collection according to claim 4, wherein: still include instruction input module (3) and signal output module (2), host system (6) are connected with instruction input module (3), signal output module (2) electricity respectively, instruction input module (3) adopt five direction button signal circuit, be used for to host system (6) input control instruction selects, adjusts, sets up and control the system menu through dialling five direction buttons of accuse to show at signal output module (2).

7. The fire early warning system based on sound wave collection according to claim 6, wherein: the signal output module (2) adopts an LCD1602 liquid crystal display screen for displaying system parameter values and fire condition state information, and a data end of the LCD1602 liquid crystal display screen is electrically connected with the main control module (6) for realizing transmission of display data or commands.

8. The fire early warning system based on sound wave collection according to claim 6, wherein: the LED warning lamp is characterized by further comprising an LED indicating lamp circuit unit (4), wherein the LED indicating lamp circuit unit (4) is electrically connected with the main control module (6) and used for sending out a warning signal; the LED indicating lamp circuit unit (4) comprises a plurality of LED indicating lamp combinations, and the LED indicating lamp circuit unit (4) controls the on and off of the LED indicating lamp combinations.

9. The fire early warning system based on sound wave collection according to claim 7, wherein: the Beidou positioning system is characterized by further comprising a Beidou positioning module (14), wherein the Beidou positioning module (14) is electrically connected with the main control module (6), and the Beidou positioning module (14) adopts an S1216F8-BD chip for marking the position of the system and transmitting position data to the main control module (6).

10. A fire early warning system based on sound wave collection according to any one of claims 1 to 9, wherein: the CAN bus communication circuit (15) is electrically connected with the main control module (6), and the CAN bus communication circuit (15) comprises an SJA1000 communication control chip and a TJA1050T driving chip and is used for providing a networking interface for the system.

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