Singapore Polytechnic School of Digital Media and Infocomm Technology
JERK SENSOR - Singapore Polytechnic
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JERK SENSOR Project Requirements Design an instrument that measures the jerking motion of the train. When the jerk limit is reached, an alarm via SMS will be raised to the engineer. The data will be recorded and stored to assist SMRT engineers to perform second line investigations on the raised alarm. Train Jerks Measure acceleration Alarm via SMS to engineer How it works 1) Sensor measures the acceleration of the train 2) Calculates jerk with respect to time 3) Records all data into SD Card in .csv format 4) If jerk reaches the jerk limit of ±0.75 / 3 , an alarm will be raised 5) Sensor sends the alarm via SMS to the engineer 6) SD Card can be extracted by engineer locally for second line investigations Project Purpose The jerk sensor can be used as a reference to determine jerk events of trains. Train jerking denotes train problems, thus, investigations can be done to improve the quality of the trains. Product parts ADXL345 Tri-axial Accelerometer, 3G MODEM, TEENSY 3.1 Microcontroller, MicroSD Card Location • Motor Car • Under the passenger seats (concealed) Benefits Done by: Muhammad Hassanul (1327322) Amirul Husni (1327281) Project Supervisor: Mr Muhammad Mulyadi Project Mentor: Mr Lim Chun Wheng A collaboration between: • Provides real time monitoring of train jerking level for indicative of a developing fault • Utilized as tool for trending and analysis to measure passenger comfort level Jerk Jerk is the rate of change of acceleration. = = 2 2 = 3 3 : ; v: velocity; x: distance
Transcript of JERK SENSOR - Singapore Polytechnic
JERK SENSOR
Project Requirements
Design an instrument that measures the jerking motion of the train. When the jerk limit is reached, an
alarm via SMS will be raised to the engineer. The data will be recorded and stored to assist SMRT
engineers to perform second line investigations on the raised alarm.
Trai
n J
erk
s Me
asure
accele
ration
Ala
rm v
ia S
MS
to e
ngi
ne
er
How it works
1) Sensor measures the acceleration of the train
2) Calculates jerk with respect to time
3) Records all data into SD Card in .csv format
4) If jerk reaches the jerk limit of ±0.75 𝑚/𝑠3,
an alarm will be raised
5) Sensor sends the alarm via SMS to the
engineer
6) SD Card can be extracted by engineer locally
for second line investigations
Project Purpose
The jerk sensor can be used as a reference to determine jerk events of trains. Train jerking denotes
train problems, thus, investigations can be done to improve the quality of the trains.
Product parts
ADXL345 Tri-axial Accelerometer, 3G MODEM,
TEENSY 3.1 Microcontroller, MicroSD Card
Location
• Motor Car
• Under the passenger seats (concealed)
Benefits
Done by: Muhammad Hassanul (1327322)
Amirul Husni (1327281)
Project Supervisor: Mr Muhammad Mulyadi
Project Mentor: Mr Lim Chun Wheng
A collaboration between:
• Provides real time monitoring of train jerking
level for indicative of a developing fault
• Utilized as tool for trending and analysis to
measure passenger comfort level
Jerk
Jerk is the rate of change of acceleration.
𝐽𝑒𝑟𝑘 =𝑑𝑎
𝑑𝑡=
𝑑2𝑣
𝑑𝑡2=
𝑑3𝑥
𝑑𝑡3
𝑎: 𝑎𝑐𝑐𝑒𝑙𝑒𝑟𝑎𝑡𝑖𝑜𝑛; v: velocity; x: distance
