Environmental monitoring for an underground utility tunnel

Project overview

An airport brought its underground power tunnels and utility galleries into power and environment monitoring. The route is plotted on a satellite base map, with about 35 SG-II gateways along it. The owner supplies temperature/humidity, level, oxygen, carbon dioxide and cover-status sensors in proportion to the gateways. Output modules start and stop pumps from level so water stays in range. Fans and lighting can be operated remotely or interlocked with the environment; cable circulating current is monitored. Hundreds of owner-supplied cameras (IPC and NVR) sit with the environment points, so a cover or level alarm can be checked against the picture.

Main functions delivered

Network overview: the tunnel is plotted on a base map; a click shows environment, level, gas, cover status and linked video
Flood interlock: pumps start and stop on level so water stays in range; remote and local control remain
Cover monitoring: open/closed status alarms; an unexpected open can be checked against a nearby camera
Gas and climate: oxygen, CO₂ and temperature/humidity along the route; breaches alarm and can interlock fans
Cable and plant: circulating current visible; fans and lighting remotely switched, with action counts
Video join-up: hundreds of owner IPC and NVR channels on the same platform; an alarm point can show the picture

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Tongwei supply

Category	Item	Model	Qty	Use
Host	Industrial IoT gateway	SG-II	35 set	Acquisition and uplink along the route; pump, fan and lighting outputs
Interlock	I/O module	IOC10-6	29 unit	Extra DI/DO for pumps, fans and lighting
Sensing	Cable circulating-current capture	CT plus transducer	7 set	Circulating current at HV cable cross-bonding boxes
Platform	IoT operations platform	TW-SmartView	1 set	Network map, split views, alarms and permissions
Platform	Monitor and operations servers	As installed	2 unit	Hosts the platform and data on site

Owner-supplied sensors (per gateway)

Category	Item	Model	Qty	Use
Environment	Temperature/humidity transmitter	Owner supply	~280 unit	About 8 per gateway along the route
Flood	Level transmitter	Owner supply	~140 unit	About 4 per gateway; drives automatic pumping
Gas	Oxygen sensor	Owner supply	~70 unit	About 2 per gateway; breaches alarm and can interlock fans
Gas	Carbon-dioxide sensor	Owner supply	~70 unit	About 2 per gateway; air quality with oxygen
Security	Cover-status sensing	Owner supply	~105 set	About 3 per gateway; open/closed alarms, checkable against video

Control and video

Category	Item	Model	Qty	Use
Control	Automatic pump control	Gateway / module output	Matches level points	Start on high level, stop when back in range; remote or local
Control	Fan and lighting control	Gateway / module output	By section	Remote on/off; can interlock with gas or environment
Video	Network cameras (IPC)	Owner supply	Hundreds of channels	Fixed, zoom and PTZ cameras linked to environment points
Video	Network video recorder (NVR)	Owner supply	Several	Existing record and playback join the same platform

The problem

The tunnels are long, covers are scattered, and flood and gas risk changes along the route. Inspection rounds are slow; water level, covers, gas and video sit in different views; pumps cannot follow level automatically, so exceptions surface late.

What we connected

SG-II gateways and I/O modules (pump, fan and lighting control)
Owner-supplied temperature/humidity, level, oxygen, CO₂ and cover status
Cable circulating-current capture
Hundreds of owner-supplied IPC / NVR channels

What we did

Gateways sit along the route so sensors onboard nearby instead of hauling every point back to a room
Level points have output modules so pumps interlock at the edge on thresholds, with remote override on the platform
Owner temperature/humidity, gas, covers and video onboarded by protocol; cameras and NVRs are not replaced
Alarms graded for level, covers and gas, linked to nearby video, so duty handles them on one map

How it was rolled out

Walk the tunnels to confirm gateway locations, wet points, covers and existing cameras
Connect level–pump interlock and cover status first, then temperature/humidity and gas
Onboard owner IPC / NVR to the same platform and map alarms to nearby cameras
Check pump auto start/stop range, fan and lighting permissions, and graded alarms

Outcome

The underground network is visible on one map
Flooding is pumped automatically from level so water stays in range
Unexpected cover opens and gas breaches alarm, and can be checked against video
Existing owner cameras join the environment view without replacement

If your site is similar

Send tunnel or gallery length, wet-point count, existing camera/NVR channels, and the protocols of temperature/humidity, level and gas sensors.

Products involved

Products used

SG-II Smart IoT Gateway SG-II SDS / IOC Expansion Modules SDS / IOC Environment and Status Sensors Temp-humidity / leak / smoke / gas / water quality AIoT Operations Platform AIoT Data Platform

Related core business

Scene Solution Services Scene Services Power and Environment Monitoring Open the scenario

Power and Environment Monitoring

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Next step

If your site is similar

Send tunnel or gallery length, wet-point count, existing camera/NVR channels, and the protocols of temperature/humidity, level and gas sensors.

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