Detailed analysis of the structure of wireless independent smoke and the advantages and disadvantages of wireless
With the rise of IOT technology, the traditional industry is also facing the trend of change, wireless, networking, the traditional fire protection field is not lonely, and vigorously develop wireless smoke detectors, the future fire network will also be a wireless network.
1 At present, in China and even in the world, the fire protection of high-rise residential buildings is a difficult problem. With the development of wireless technology, we are expected to solve the fire alarm problem of high-rise residential buildings.
From the perspective of product structure, wireless smoke is a relatively simple product, as shown below:
2 Basically, a wireless module is installed inside the traditional smoke. The main solutions on the market are mainly 433MHz/LoRa/NB-IOT. NB-IOT has better expectations in the future, but at this stage, The cost is too high, so the products currently deployed are mainly in the form of 433MHz/LoRa.
The internal structure of the product is shown in the figure above.
3 for 433 or LoRa issues:
433MHz wireless:
Advantages: low cost, simple development, low power consumption
Disadvantages: short transmission distance, it is difficult to solve a large number of node networking problems (generally within 20 nodes);
Scope of application: small places, or independent household use.
LoRa Wireless:
Advantages: long transmission distance, 3,000 points of networking and strong wall penetration capability through the gateway;
Disadvantages: The cost is higher than 433, and the power consumption is relatively larger than 433.
Scope of application: residential areas, apartments, office buildings, etc.
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