1. Project Overview
The project is located in Foshan City, Guangdong Province. There are 30 factories distributed within a range of 30 kilometers. Each factory has a fire control room on the first floor. Each factory has 1-2 sky or underground fire ponds. The height of the fire ponds is 1-8. There are 56 firefighting pools in total, and the liquid level of the firefighting pools needs to be monitored.
2. Customer requirements
The customer proposes two scheme requirements:
Option One:
Each fire pool is equipped with a passive output liquid level sensor, with a liquid crystal display device, with high and low water level alarm function, wireless medium transmission (GPS/NB, etc.), a server is set up at the headquarters to receive the collected information of all liquid level sensors, and has an alarm Function, display each device on the floor plan.
Option II:
Each fire pool is equipped with a passive output liquid level sensor, with a liquid crystal display device, with high and low water level alarm function, and wireless medium transmission (LoRa). The display device is installed on the first floor of each plant area. The distance between the duty room and the fire pool is 500 Within meters, it can receive the information collected by the liquid level sensor in the factory area and has an alarm function.
3. Detailed plan
Option 1: Centralized monitoring
1. Signal acquisition
The water level information collection of the fire fighting pool uses a wireless pressure transmitter and uses NB-IoT signal transmission.
The detailed parameters are as follows:
parameter name |
Parameter information |
Remarks |
Level range |
(0~8)mH2O |
|
Data upload cycle |
10 seconds to 12 hours |
Can be set |
Signal transmission |
NB-IoT |
|
Display method |
3½LCDdisplay |
|
Working power |
3.6V DC |
|
小数位数 |
3位 |
可设定 |
表头显示 |
液位高度、电池电压、无线信道等 |
|
工作环境温度 |
-10℃~70℃ |
|
工作环境湿度 |
≤97%RH |
|
外壳防护等级 |
IP65 |
|
表1 NB-IoT无线压力变送器参数
2、信号传输
消防水池的液位信息传输方式如下:
3、软件功能
- 平面图上显示各消防水池监测点。
- 液位监测点信息实时查看。
- 数据采集及上传间隔修改。
- 消防水池液位报警上、下限修改。
- 液位超过所设报警上、下限,软件报警。
- 历史报警记录保存,可查询。
方案二:单独监测
1、信号采集
消防水池的液位高度信息采集使用无线压力变送器,采用LoRa信号传输。
其详细参数如下:
参数名称 |
参数信息 |
备注 |
液位量程 |
(0~8)mH2O |
|
数据上传周期 |
10秒~12小时 |
可设定 |
信号传输 |
LoRa |
|
显示方式 |
3½LCD显示 |
|
工作电源 |
3.6V DC |
|
小数位数 |
3位 |
可设定 |
表头显示 |
液位高度、电池电压、无线信道等 |
|
工作环境温度 |
-10℃~70℃ |
|
工作环境湿度 |
≤97%RH |
|
外壳防护等级 |
IP65 |
|
表2 LoRa无线压力变送器参数
2、信号传输
消防水池的液位信息传输方式如下:
- 软件功能
- 液位监测点信息实时查看。
- 数据采集及上传间隔修改。
- 消防水池液位报警上、下限修改。
- 液位超过所设报警上、下限,软件报警。
- 历史报警记录保存,可查询。