CN210136541U

CN210136541U - Wireless fire control smoke detection alarm system based on Lora

Info

Publication number: CN210136541U
Application number: CN201921188917.3U
Authority: CN
Inventors: 孙翔; 何源; 曾佳俊
Original assignee: Chengdu University of Information Technology
Current assignee: Chengdu University of Information Technology
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-03-10
Anticipated expiration: 2029-07-25

Abstract

The utility model discloses a wireless fire-fighting smoke alarm system based on Lora, which comprises a Lora wireless fire-fighting smoke alarm terminal and a monitoring terminal; the Lora wireless fire-fighting smoke-sensing terminal is connected with the monitoring terminal through the Lora gateway router; the Lora wireless fire-fighting smoke-sensing terminal comprises an MCU, and a control and data acquisition module, a state display module, a data transmission module and a battery which are electrically connected with the MCU; the control and data acquisition module comprises a single-pole double-throw switch, a plurality of keys and a plurality of smoke-sensitive probe sensors which are respectively and electrically connected with the MCU; the state display module comprises a buzzer and an LED which are respectively and electrically connected with the MCU; the data transmission module comprises a Lora chip and a radio frequency circuit which are electrically connected with the MCU; the Lora chip and the radio frequency circuit are electrically connected with the monitoring terminal through the Lora gateway router; the monitoring terminal comprises a computer monitoring terminal and a mobile client electrically connected with the computer monitoring terminal.

Description

Wireless fire control smoke detection alarm system based on Lora

Technical Field

The utility model belongs to the technical field of the fire control is reported to the police, concretely relates to alarm system is felt to wireless fire control cigarette based on Lora.

Background

Fire control has always been a major problem that has been concerned with social stability and public safety since ancient times, and from ancient times and present times, the loss caused by accidents caused by fire is an immeasurable value, and the existing building fire control sensors are strung together with sensor nodes by wires, wiring is needed during construction, and the construction consumes time and labor. In the past, due to the fact that wireless communication has a great unstable factor, countries have strict control over the transmission mode of fire alarm signals in order to guarantee safety of lives and properties. In recent years, along with the development of science and technology, wireless transmission has been greatly improved, and the reliability of data transmission is greatly improved through technical regulations, so that a standard document of 'general requirements for wireless communication functions of fire alarm systems' is released in 2014, and traditional fire-fighting enterprises are greatly encouraged to change traditional wired transmission fire-fighting data into wireless transmission. Also encouraged by such standards and policies, the application of wireless communication to fire control is slowly becoming an important direction for the transition of traditional fire-fighting enterprises.

With the release of the national wireless fire-fighting standard in 2014, fire-fighting systems using wireless transmission technology are continuously appearing in front of people. For example, the wireless fire fighting system using the ZigBee technology, the household fire fighting system using the 470Mhz technology and the wireless fire fighting system using the GPRS technology have the characteristic of permanent use after one-time installation, but the wireless fire fighting system cannot be applied to a large-scale scene due to the limitation of transmission distance in the technology per se, only can be applied to a small-scale application environment similar to a household, and the wireless fire fighting system has the capability of large-area application, but is not applicable to large-scale use due to the characteristic that more maintenance cost needs to be invested due to the limitation of cost and later-stage use. Formally, due to the contradiction between the technology and the application scene, no wireless fire fighting system which can really meet the requirements of large-scale application and is low in maintenance cost exists at present. Therefore, the traditional wired data transmission mode is still used in the case of large-scale fire-fighting data transmission at present.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the aforesaid among the prior art not enough, provide a wireless fire control smoke detection alarm system based on Lora to solve or improve foretell problem.

In order to achieve the purpose, the utility model adopts the technical proposal that:

a wireless fire-fighting smoke alarm system based on Lora comprises a Lora wireless fire-fighting smoke alarm terminal and a monitoring terminal; the Lora wireless fire-fighting smoke-sensing terminal is connected with the monitoring terminal through the Lora gateway router;

the Lora wireless fire-fighting smoke-sensing terminal comprises an MCU, and a control and data acquisition module, a state display module, a data transmission module and a battery which are electrically connected with the MCU;

the control and data acquisition module comprises a single-pole double-throw switch, a plurality of keys and a plurality of smoke-sensitive probe sensors which are respectively and electrically connected with the MCU; the state display module comprises a buzzer and an LED which are respectively and electrically connected with the MCU; the data transmission module comprises a Lora chip and a radio frequency circuit which are electrically connected with the MCU; the Lora chip and the radio frequency circuit are electrically connected with the monitoring terminal through the Lora gateway router; the monitoring terminal comprises a computer monitoring terminal and a mobile client electrically connected with the computer monitoring terminal.

Preferably, the MCU is an STM32L151C8T6 microcontroller.

Preferably, the Lora chip and the radio frequency circuit comprise the Lora chip SX1278 and a peripheral radio frequency circuit electrically connected with the Lora chip SX 1278.

Preferably, a plurality of smoke detector sensors are respectively connected with

pins

2 and 3 of the MCU.

Preferably, the smoke detector sensor is of the type AKT-Y168-03.

Preferably, the buzzer is of the type HYE 1206-12.

Preferably, the Lora gateway router is of the type Lora gateway F8916-L.

The utility model provides a wireless fire control smoke detection alarm system based on Lora has following beneficial effect:

the utility model discloses compare traditional alarm mode, reduced the wiring and walked the line, practiced thrift manpower and financial resources. Except this, the utility model discloses a transmission distance can reach 8 kilometers the highest, can solve current fire alarm effectively and receive the problem of distance restriction in extensive application scene data transmission, and only need the investment once when constructing wireless fire alarm system, relatively with the wireless fire alarm system who uses GPRS or NB-IOT, only need the investment once, does not need follow-up expenditure on network maintenance.

Drawings

Fig. 1 is a schematic block diagram of a Lora-based wireless fire-fighting smoke alarm system.

Fig. 2 is a circuit diagram of a wireless fire-fighting smoke alarm system control and data acquisition module based on Lora.

FIG. 3 is a circuit diagram of a wireless fire-fighting smoke alarm system MCU based on Lora.

Fig. 4 is a data transmission module circuit diagram of a wireless fire-fighting smoke alarm system based on Lora.

FIG. 5 is a Lora-based wireless fire-fighting smoke alarm system status display module circuit diagram.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.

According to an embodiment of the application, referring to fig. 1, the wireless fire-fighting smoke-sensing alarm system based on Lora in the scheme comprises a Lora wireless fire-fighting smoke-sensing terminal and a monitoring terminal; the Lora wireless fire-fighting smoke sensing terminal is connected with the monitoring terminal through the Lora gateway router.

The Lora wireless fire-fighting smoke sensing terminal comprises an MCU, and a control and data acquisition module, a state display module, a data transmission module and a battery which are electrically connected with the MCU.

Referring to fig. 3, the MCU is an STM32L151C8T6 microcontroller, and is configured to receive smoke concentration information transmitted by the smoke sensor probe sensor in real time, control the Lora chip and the radio frequency circuit to complete communication with the Lora gateway router, and transmit the smoke concentration information to the monitoring terminal.

Referring to fig. 2, the control and data acquisition module includes a single-pole double-throw switch, a plurality of keys, and a plurality of smoke detector sensors, which are electrically connected to the MCU, respectively.

The single-pole double-throw switch is arranged on a main circuit of the battery and used for managing the on and off of the whole power supply; power source is used for inserting power supply battery, and 2, 3 feet all are connected to MCU in the smoke detector sensor inserts the mouth, and 2 feet are used for transmitting smoke detector sensor smog monitoring state, and 3 feet are used for monitoring smoke detector sensor's connection status.

The smoke sensor probe sensor is AKT-Y168-03 and is used for being installed on the wall of an area to be detected, collecting smoke concentration information of the area to be detected in real time and uploading the smoke concentration information to an STM32L151C8T6 microcontroller in real time.

The keys are used for completing special control such as sending test data and switching the working mode of each module.

Referring to fig. 5, the state display module includes two buzzers and two LEDs, which are respectively electrically connected with the MCU, wherein the buzzers are HYE1206-12 in type, and the operating state of the Lora wireless fire-fighting smoke-sensing terminal is reflected by the on/off and flashing of the LEDs and the sounding of the buzzers; if the LED lamp is on, the Lora wireless fire-fighting smoke-sensing terminal is in a normal working state; the LED flickers and the buzzer rings to represent alarm, namely the current smoke concentration is larger than the preset concentration value.

Referring to fig. 4, the data transmission module includes a Lora chip and a radio frequency circuit electrically connected to the MCU; the Lora chip and the radio frequency circuit are electrically connected with the monitoring terminal through the Lora gateway router, and communication connection with the monitoring terminal is achieved.

The Lora chip and the radio frequency circuit are formed by the Lora chip SX1278 and a peripheral radio frequency circuit, the SX1278 is a low-medium frequency transceiver for half-duplex transmission, and has high sensitivity: the power is high efficiency as low as-148 dBm and as high as +14dBm, the maximum link budget of an amplifier 168dBm, the low receiving working current of 9.9mA, the working current of a 200nA register, and the radio frequency circuit can transmit 5.3km at the farthest by actual measurement.

The Lora chip and the radio frequency circuit are controlled by an STM32L151C8T6 microcontroller, and data communication with the Lora gateway router is completed through 470Mhz wireless communication.

The monitoring terminal comprises a computer monitoring terminal and a mobile client electrically connected with the computer monitoring terminal, and the computer monitoring terminal and the mobile client need real-name registration and authentication.

The working process of the scheme is as follows:

when smoke sensor on the terminal is felt to the wireless fire control smoke of Lora gathers the regional smog concentration that awaits measuring and sends the warning, MCU is after receiving alarm signal, awaken up the data transmission module on the wireless fire control smoke of Lora feels the terminal immediately, control data transmission module outwards sends the wireless fire control alarm information of Lora immediately, the regional Lora gateway router in place sends it to computer monitor terminal receiving alarm information, computer monitor terminal sends this alarm information to long-range mobile client through the network, accomplish the warning so far.

According to an embodiment of the application, the system is not limited to the alarm of fire, and the smoke sensor probe sensor can be replaced by other sensors according to requirements to perform wireless alarm in other fields. Such as electrical fires, gas fires, water pressure, etc.

The system has the following beneficial effects:

wireless transmission: various troubles caused by wiring in the traditional wiring are avoided, and meanwhile, the waste of manpower and financial resources caused by the problems of wiring and the like is reduced.

Low power consumption: the devices selected in a matched mode are all designed with ultra-low power consumption, energy consumption is less compared with the existing wireless fire-fighting solution, and the service time of the Lora wireless fire-fighting smoke-sensing terminal after one-time installation is prolonged.

Wide area: the whole system uses the Lora chip and the radio frequency circuit to match with the Lora gateway router, and the data transmission distance can reach 8 kilometers at the farthest. The method is a data transmission mode for realizing the wide area network in a real sense in a small number at present.

Primary investment: only one investment is needed when the system is built, and compared with a wireless fire alarm system using GPRS or NB-IOT, the subsequent expenditure on network maintenance is not needed.

While the present invention has been described in detail with reference to the embodiments, the scope of the present invention should not be limited to the embodiments. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims

1. The utility model provides a wireless fire control smoke sensation alarm system based on Lora which characterized in that: the system comprises a Lora wireless fire-fighting smoke-sensing terminal and a monitoring terminal; the Lora wireless fire-fighting smoke-sensing terminal is connected with the monitoring terminal through the Lora gateway router;

the control and data acquisition module comprises a single-pole double-throw switch, a plurality of keys and a plurality of smoke detector sensors which are respectively and electrically connected with the MCU; the state display module comprises a buzzer and an LED which are respectively and electrically connected with the MCU; the data transmission module comprises a Lora chip and a radio frequency circuit which are electrically connected with the MCU; the Lora chip and the radio frequency circuit are electrically connected with the monitoring terminal through the Lora gateway router; the monitoring terminal comprises a computer monitoring terminal and a mobile client electrically connected with the computer monitoring terminal.

2. The Lora-based wireless fire-fighting smoke alarm system according to claim 1, wherein: the MCU is an STM32L151C8T6 microcontroller.

3. The Lora-based wireless fire-fighting smoke alarm system according to claim 1, wherein: the Lora chip and the radio frequency circuit comprise a Lora chip SX1278 and a peripheral radio frequency circuit electrically connected with the Lora chip SX 1278.

4. The Lora-based wireless fire-fighting smoke alarm system according to claim 1, wherein: and the smoke detector sensors are respectively connected with pins 2 and 3 of the MCU.

5. The Lora-based wireless fire-fighting smoke alarm system according to claim 1, wherein: the type of the smoke sensor probe sensor is AKT-Y168-03.

6. The Lora-based wireless fire-fighting smoke alarm system according to claim 1, wherein: the type of the buzzer is HYE 1206-12.

7. The Lora-based wireless fire-fighting smoke alarm system according to claim 1, wherein: the model of the Lora gateway router is Lora gateway F8916-L.