Page 35 - Gi flipbook - October 2018

FIGURE 1 Building with platform FIGURE 5 Pulley system

FIGURE 2 Building with narrow lightwell

DO PHASE gas detection device, which was
After coming up with the design connected by a 7x7 Grade 304
FIGURE 3 PDCA model
concept and its considerations, the stainless steel rope.
prototype integrated several devices Since the minimum breaking
into one single solution, combining gas strength (MBS) of the Grade 304
service riser inspection, equipment stainless steel is 120lb, equivalent to
support and safety enhancement. 54.4kg, it was assumed the pulley
A laser methane gun made up the system and screw clamp would be
main body of the device. This emits a sufficient to withstand the weight of
laser at particular wavelengths, the newly developed device, which
analysing the reflected light and was just 6kg.
allowing us to determine the amount of As the newly developed device
methane in the exposed environment. would be likely to shake in windy
On top of the laser methane gun, a conditions, a stabiliser was used to
digital camera with an LED panel was hold the camera in position. Should a
positioned to capture real-time images wide angle image be needed, the
o
of the gas service risers and readings stabiliser can rotate 360 with a
from the laser methane gun. This remote control.
shows us the riser’s corrosion status To reinforce the safe use of the gas
FIGURE 4 Screw clamp
and gas leakage condition. detection device, a proximity sensor
Since the integrated device has to was included. This stops the device
hang from the top of a building, a from moving when it detects obstacles
fixture with a pulley system was less than one meter from the sensor.
deployed. For the fixture, a screw The device is equipped with an
clamp (Figure 4), which can hold a emergency stop, which allows the user
20kg object, was mounted on the to pause the gas service riser inspection
rooftop wall. when encountering any risks.
Then, a system with five pulleys Most importantly, the newly
(Figure 5) was designed to convey the developed gas detection device had to

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