The document proposes a system to monitor wind-induced vibration in high transmission towers online using wireless sensors. It summarizes existing wire-based monitoring methods and their limitations. The proposed system uses an accelerometer interfaced with a PIC microcontroller to measure vibration. If vibration exceeds a threshold, the microcontroller transmits the status to a monitoring section using Zigbee wireless. Authorized personnel can then view the monitoring data in real-time over the internet to take immediate corrective action if needed.

1. ONLINE MONITORING OF WIND-INDUCED VIBRATION OF
TRANSMISSION STEEL HIGH TOWER
Abstract:
New technologies like UHV, multi-circuit lines on the same tower, heavy section and
bundled conductor are applied in transmission grid in China. Due to increase of structure height
and flexibility of tower as well as effect of conductor’s wind load, wind-induced vibration effect
is significantly increased. Vibration may lead to fatigue damage of member and looseness of
bolted connection even collapse of tower and effect vibration-proof of conductor. It is necessary
to enhance supervision on wind-induced vibration of tower and take measures to control
vibration to allowable extent so as to reduce adverse impact from wind-induced vibration.
Existing system:
At present, method common in vibration test is wire transmission, that is, sensor in each
test point picks up vibration signal, which is then transmitted to signal collecting device for
analysis and processing through signal shielded wire. However, field power of line may fail to
guarantee supply thus impact normal use of some instruments. Layout of sensors and wiring is of
high difficulty for high tower.
Proposed system:
In the proposed system, the vibration produced on the steel towers due to the prevailing
wind is measured using accelerometer. The accelerometer is interfaced with the PIC
microcontroller. The vibration produced is measured and threshold value is compared. If the
value is too large immediately the status is transmitted to the Monitoring Section through Zigbee.
In the Monitoring section, the message is received and it is updated in Internet along with the
current time. The authorized persons can directly know the last updated abnormality by viewing
that particular web site. Hence immediate actions can be taken.

2. Block Diagram:
Tower Section:
Power
Supply
PIC
MAX
232
LCD
16F877A
Micro
ZIGBEE
Monitoring Section:
MAX 232
ZIGBEE
Controller
MEMS
Accelerometer

3. Hardware requirements:
 PIC16F877A Microcontroller with Power Supply
 MEMS Accelerometer
 Zigbee
 Max 232
 LCD
 PC with .net
Software requirements
 Embedded c
 MPLab Compiler or CCS Compiler
 VB .NET
Advantages
 Improved real-time monitoring.
 Optimized performance.
Applications:
 Can be applied in all industries where towering is a part.