☆ Hardware Design Components: STC89C52 Microcontroller + GSM SMS Module + DS18B20 Temperature Sensor + MQ2 Smoke Sensor + HC-SR501 Human Motion Sensor + ADC0832 Analog-to-Digital Converter Chip + LCD1602 Liquid Crystal Display + AT24C02 Storage Chip + Buzzer + LED Light + Button. 1. The STC89C52 microcontroller is used as the control core, updating … Read more
Solutions to Common Issues in Fire Alarm Systems: Line Voltage Drop During the debugging of bus-type fire alarm control systems, it is common to encounter situations where the fire alarm controller has issued control commands, and the control modules have activated, but some external control devices such as smoke exhaust valves and air supply vents … Read more
Fire Alarm System Multi-Line and Bus System Fire alarm system bus system instance diagram. The so-called fire alarm system multi-line refers to each detector (device) having an independent signal circuit with the controller, and the detectors (devices) are independent of each other, with all detection signals being input to the controller in parallel. In simple … Read more
In the study of fire alarm systems, we encounter the concepts of “bus control panel” and “multi-line control panel”. So what is bus control? What is multi-line control? What fire protection equipment do they control? Let’s take a detailed look. The so-called fire alarm system multi-line control means that each detector (device) has an independent … Read more
After a fire occurs, lowering the fire curtain can control the spread of fire and smoke; lowering the fire elevator to the first floor can provide conditions for firefighters to access the building… How are these operations carried out in the fire control room? This article is aimed at firefighters and fire facility operators, explaining … Read more
1. Principle of Short Circuit Isolator The short circuit isolator is a device used in the transmission bus of fire alarm systems to isolate branch line short circuits. It can automatically make the ends of the short-circuited part present a high-resistance state or open circuit state, preventing damage to the controller and not affecting the … Read more
[Image] 1. Fire Automatic Alarm and Linkage Control System 1. During the debugging of the fire alarm controller, when the connection between the controller and the detector is open or short-circuited, the controller should issue a fault signal within 100 seconds (except when a fire alarm signal is issued during a short circuit). In a … Read more
Click the blue text to follow us Specific Functions Implemented Composed of STC89C52 microcontroller + LCD1602 display + ADC0832 module + buzzer + DHT11 temperature and humidity sensor + smoke sensor + LED + buttons. Specific Functions: 1. The first line of the LCD1602 displays the current smoke value, and the second line displays the … Read more
When learning about fire alarm systems, many people encounter the professional terms “Two-Wire Bus”, “Two-Wire System”, and “Four-Wire System”. So, what do they mean? What are the differences and application scenarios? Today, we will quickly clarify these common concepts! 1. Starting from the basics: Where do the Two-Wire Bus, Two-Wire System, and Four-Wire System come … Read more
(1) Achievement Overview: The smart fire early warning system based on NB-IoT consists of perception layer devices, NB-IoT network, wireless connected fire warning monitoring platform, and terminal App. The perception layer devices include independent smoke fire detectors with wireless connectivity, independent temperature fire detectors, independent combustible gas detectors, and independent electrical fire monitoring detectors. This … Read more