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

Abstract

The utility model discloses a Lora-based wireless fire-fighting smoke alarm system, comprising a Lora wireless fire-fighting smoke-sensing terminal and a monitoring terminal; the Lora wireless fire-fighting smoke-sensing terminal and the monitoring terminal are connected through a Lora gateway router; the Lora wireless fire-fighting smoke-sensing terminal comprises MCU, and a control and data acquisition module, a status display module, a data transmission module and a battery electrically connected to the MCU; the control and data acquisition module includes a single-pole double-throw switch, a number of buttons and a number of smoke detector sensors electrically connected to the MCU respectively; The status display module includes a buzzer and an LED that are electrically connected to the MCU; the data transmission module includes a Lora chip and a radio frequency circuit that are electrically connected to the MCU; the Lora chip and the radio frequency circuit are electrically connected to the monitoring terminal through the Lora gateway router; the monitoring terminal includes a computer A monitoring terminal and a mobile client electrically connected with the computer monitoring terminal.

Description

A wireless fire-fighting smoke alarm system based on Lora

technical field

The utility model belongs to the technical field of fire alarms, in particular to a Lora-based wireless fire-fighting smoke alarm system.

Background technique

Fire protection has always been a major issue related to social stability and public safety since ancient times. Since ancient times, the loss caused by accidents caused by fire has always been an immeasurable value, and today's building fire sensors are all made of wires and sensors. The nodes are strung together, and wiring is required during construction, which is time-consuming and labor-intensive. In the past, due to the large unstable factors of wireless communication, in order to ensure the safety of life and property, the country has strictly controlled the transmission method of fire alarm signals. In recent years, with the development of science and technology, wireless transmission has made great progress, and the reliability of data transmission has been greatly improved through technical regulations. Therefore, in 2014, the country released a "fire alarm system wireless communication function". General requirements" standard document, and greatly encourage traditional fire protection enterprises to change the traditional wired transmission of fire protection data to wireless transmission. It is precisely because of the encouragement of such standards and policies that the application of wireless communication to fire control has gradually become an important direction for the transformation of traditional fire protection enterprises.

With the release of the national standard for wireless fire protection in 2014, fire protection systems using wireless transmission technology continue to appear in front of people. For example, the wireless fire protection system using ZigBee technology, the home fire protection system using 470Mhz, and the wireless fire protection system using GPRS technology, the first two have the characteristics of permanent use after one installation, but because of the limitation of transmission distance in their own technology, they cannot be large. Large-scale applications in large-scale scenarios can only be used in small application environments such as homes. The latter has the ability to apply in a large area, but due to cost constraints and the need to invest more maintenance costs in later use, it is doomed to be useless. Can be used on a large scale. Formally because of the contradiction between this technology and application scenarios, there is no wireless fire protection system that can really meet the needs of large-scale applications and has low maintenance costs. Therefore, in the case of large-scale fire protection data transmission, the traditional wired data transmission method is still used.

Utility model content

The purpose of the present invention is to provide a Lora-based wireless fire-fighting smoke alarm system to solve or improve the above-mentioned problems in view of the above-mentioned deficiencies in the prior art.

In order to achieve the above object, the technical scheme adopted by the present utility model is:

A Lora-based wireless fire-fighting smoke alarm system, comprising a Lora wireless fire-fighting smoke-sensing terminal and a monitoring terminal; the Lora wireless fire-fighting smoke-sensing terminal and the monitoring terminal are connected through a Lora gateway router;

The Lora wireless fire-fighting smoke sensor terminal includes an MCU, a control and data acquisition module, a status display module, a data transmission module and a battery that are electrically connected to the MCU;

The control and data acquisition module includes a single-pole double-throw switch, a number of buttons and a number of smoke detector sensors electrically connected to the MCU; the status display module includes a buzzer and an LED that are electrically connected to the MCU; the data transmission module includes an electrical connection to the MCU. Lora chip and radio frequency circuit; the Lora chip and radio frequency circuit are electrically connected with the monitoring terminal through the Lora gateway router; the monitoring terminal includes 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 include a Lora chip SX1278 and a peripheral radio frequency circuit electrically connected to the Lora chip SX1278.

Preferably, several smoke probe sensors are connected to pins 2 and 3 of the MCU, respectively.

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

Preferably, the model of the buzzer is HYE1206-12.

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

The Lora-based wireless fire-fighting smoke alarm system provided by the utility model has the following beneficial effects:

Compared with the traditional alarm mode, the utility model reduces the wiring and wiring, and saves manpower and financial resources. In addition, the transmission distance of the present invention can reach a maximum of 8 kilometers, which can effectively solve the problem that the data transmission of the existing fire alarm is limited by distance in large-scale application scenarios, and only one investment is required when constructing a wireless fire alarm system. , Compared with the wireless fire alarm system using GPRS or NB-IOT, only one investment is required, and no follow-up expenses are required for network maintenance.

Description of drawings

Fig. 1 is the principle block diagram of the wireless fire-fighting smoke alarm system based on Lora.

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

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

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

Figure 5 is a circuit diagram of the state display module of the wireless fire smoke alarm system based on Lora.

Detailed ways

The specific embodiments of the present invention are described below to facilitate those skilled in the art to understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. Various changes are within the spirit and scope of the present utility model defined and determined by the appended claims, and these changes are obvious, and all utility model creations utilizing the concept of the present utility model are included in the protection list.

According to an embodiment of the present application, referring to FIG. 1 , the Lora-based wireless fire-fighting smoke alarm system of this solution includes a Lora wireless fire-fighting smoke-sensing terminal and a monitoring terminal; the Lora wireless fire-fighting smoke-sensing terminal and the monitoring terminal are connected through a Lora gateway router .

The Lora wireless fire-fighting smoke sensor terminal includes an MCU, a control and data acquisition module, a status display module, a data transmission module and a battery that are electrically connected to the MCU.

Referring to Figure 3, the MCU is the STM32L151C8T6 microcontroller, which is used to receive the smoke concentration information transmitted by the smoke detector sensor in real time, and control the Lora chip and the radio frequency circuit to complete the communication with the Lora gateway router, and transmit the smoke concentration information to the monitor. terminal.

Referring to FIG. 2 , the control and data acquisition module includes a single-pole double-throw switch electrically connected to the MCU, a number of buttons, and a number of smoke detector sensors.

The single-pole double-throw switch is set on the main circuit of the battery to manage the opening and disconnection of the entire power supply; the power interface is used to connect the power supply battery, and the 2 and 3 pins of the smoke detector sensor access port are connected to the MCU, and the 2 pin Used to transmit the smoke monitoring status of the smoke detector sensor, and pin 3 is used to monitor the connection status of the smoke detector sensor.

The smoke detector sensor model is AKT-Y168-03, which is installed on the wall of the area to be measured, collects the smoke density information of the area to be measured in real time, and uploads the smoke density information to the STM32L151C8T6 microcontroller in real time.

The keys are used to complete special controls such as sending test data and switching the working mode of each module.

Referring to Figure 5, the status display module includes a buzzer and an LED that are electrically connected to the MCU respectively. There are two LEDs. The model of the buzzer is HYE1206-12. The LED turns on and off, flashes and the buzzer sounds. , to reflect the working status of the Lora wireless fire-fighting smoke sensor terminal; if the LED light is on, it means that the Lora wireless fire-fighting smoke detector terminal is in normal working state; the LED flashes and the buzzer sounds to indicate an alarm, that is, the current smoke concentration is greater 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 to the monitoring terminal through the Lora gateway router to realize communication connection with the monitoring terminal.

Lora chip and RF circuit are composed of Lora chip SX1278 plus peripheral RF circuit. SX1278 is a low-IF transceiver for half-duplex transmission, with high sensitivity: as low as -148dBm, high-efficiency power as high as +14dBm, amplifier 168dBm maximum link Budget, 9.9mA low receiving working current, 200nA register working current, the RF circuit can transmit up to 5.3km.

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

The monitoring terminal includes a computer monitoring terminal and a mobile client that is electrically connected to the computer monitoring terminal. The computer monitoring terminal and the mobile client need real-name registration and authentication.

The workflow of this program is:

When the smoke detector sensor on the Lora wireless fire-fighting smoke terminal collects the smoke concentration in the area to be measured and issues an alarm, the MCU immediately wakes up the data transmission module on the Lora wireless fire-fighting smoke terminal after receiving the alarm signal, and controls the data transmission module Send Lora wireless fire alarm information to the outside immediately, the Lora gateway router in the area receives the alarm information and sends it to the computer monitoring terminal, and the computer monitoring terminal sends the alarm information to the remote mobile client through the network, and the alarm is completed.

According to an embodiment of the present application, the system is not limited to alarming fires, and can also replace the smoke detector sensor with other sensors according to requirements to perform wireless alarming in other fields. Such as electrical fires, gas fires, water pressure, etc.

The system has the following beneficial effects:

Wireless transmission: It eliminates all kinds of troubles caused by wiring in traditional wiring, and also reduces the waste of manpower and financial resources caused by wiring and other problems.

Low power consumption: The selected devices are designed with ultra-low power consumption, which consumes less energy than the existing wireless fire protection solutions, and prolongs the service time of the Lora wireless fire smoke sensor terminal after one installation.

Wide area: The entire system uses Lora chips and radio frequency circuits with Lora gateway routers, and its data transmission distance can reach up to 8 kilometers. It is one of the few data transmission methods that truly realize the wide area network today.

One-time investment: Only one-time investment is required when building the system. Compared with the wireless fire alarm system using GPRS or NB-IOT, there is no need for subsequent expenditure on network maintenance.

Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, they should not be construed as limiting the protection scope of the present patent. Within the scope described in the claims, various modifications and deformations that can be made by those skilled in the art without creative work still belong to the protection scope of this patent.

Claims (7)

1. a wireless fire-fighting smoke-sensing alarm system based on Lora, is characterized in that: comprise Lora wireless fire-fighting smoke-sensing terminal and monitoring terminal; Described Lora wireless fire-fighting smoke-sensing terminal and monitoring terminal are connected by Lora gateway router; The Lora wireless fire-fighting smoke detection terminal includes an MCU, a control and data acquisition module, a status display module, a data transmission module and a battery electrically connected to the MCU; The control and data acquisition module includes a single-pole double-throw switch, a number of buttons and a number of smoke detector sensors that are electrically connected to the MCU; the status display module includes a buzzer and an LED that are electrically connected to the MCU; the data transmission The 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 to a monitoring terminal through a Lora gateway router; the monitoring terminal includes a computer monitoring terminal and a mobile client electrically connected to 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 . 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 to the Lora chip SX1278. 4 . 4. The wireless fire-fighting smoke alarm system based on Lora according to claim 1, characterized in that: several of the smoke probe sensors are respectively connected with pins 2 and 3 of the MCU. 5. The wireless fire-fighting smoke alarm system based on Lora according to claim 1, wherein the model of the smoke probe sensor is AKT-Y168-03. 6 . The wireless fire-fighting smoke alarm system based on Lora according to claim 1 , characterized in that: the model of the buzzer is HYE1206-12. 7 . 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. 8 .

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