Download design of coal mine ventilator intelligent monitoring system

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DESIGN OF COAL MINE VENTILATOR INTELLIGENT MONITORING SYSTEM
IEEE TRANSACTIONS ON AEROSPACE & ELECTRONIC SYSTEMS : VOL. 23, NO. 3, JUNE 2013
Yuqin Zhu1, Guoshi Yang2
TECHNICAL SPECIFICATION:
Title of the project
:
Design Of Coal Mine Ventilator Intelligent
Monitoring System
Domain
:
Embedded Systems, Environment Systems
Software
:
Embedded C, Keil, Flash Magic
Microcontroller
:
LPC2148 controller
Power Supply
:
+9V, +12V Lead Acid Battery
Gas Sensor
:
MQ-6
Temperature Sensor
:
LM35
Communication device
:
Zigbee Module (Tx, Rx )
DC Geared Motor
:
2 (60 rpm)
Buzzer
:
1
Crystal
:
12MHz
Applications
:
Military, Défense, Household Applications, Industries etc.
Developed By
:
M/S Wine Yard Technologies
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Abstract:
Mining has been perceived an extremely dangerous yet necessary occupation around
the world. Hazardous mining environments generally refer to the presence of dangerous gases
within an underground mine. Mine Air quality system has to check frequently the presence of
hazardous gases and temperature in coal mines. The most common method employed to
continuously monitor for leakage of hazardous gases is to place a number of sensors at the
places where any leaks are most likely to occur. If it detects the presence of dangerous gases
automatically it gives information at the receiver side.
These robots play vital role in Natural Gas and coal mines, process industries. This robot
is controlled by a Zigbee remote. This can be moved forward and reverse direction using geared
motors of 60RPM. Also this robot can take sharp turnings towards left and right directions. This
project uses LPC2148 as its controller. A high sensitive LPG sensor, Temperature sensor is fixed
to this robot.
In this project we use different modules such as Zigbee (Tx, Rx), LPC2148 as controller,
Gas Sensor (MQ-6), Buzzer to detect the presence of gas and display the presence of gas
wirelessly on 16X2 LCD on the transmitter side.
This project uses sensors such as Gas Sensor (MQ-6), Temperature sensor
(LM35).Whenever hazardous gas is detected, a buzzer is connected to produce audible alert
signal. And the sensor values are given to ADC to get processed by LPC2148 controller. The
temperature sensor LM35 senses the temperature and converts it into an electrical (analog)
signal, which is applied to the micro controller through ADC. The analog signal is converted into
digital format by the analog-to-digital converter (ADC).
ZigBee is the name of a specification for a suite of high level communication protocols
using small, low-power digital radios based on the IEEE 802.15.4 standard for wireless personal
area networks (WPANs), such as wireless headphones connecting with cell phones via short
range radio. The technology is intended to be simpler and cheaper than other WPANs, such as
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Bluetooth. ZigBee is targeted at radio-frequency (RF) applications that require a low data rate,
long battery life, and secure networking ZigBee is a low-cost, low-power, wireless mesh
networking standard. The low cost allows the technology to be
widely deployed in wireless
control and monitoring applications, the low power-usage allows longer life with smaller
batteries, and the mesh networking provides high reliability and larger range
The LPC2148 are based on a 16/32 bit ARM7TDMI-S™ CPU with real-time emulation and
embedded trace support, together with 128/512 kilobytes of embedded high speed flash
memory. A 128-bit wide memory interface and unique accelerator architecture enable 32-bit
code execution at maximum clock rate. For critical code size applications, the alternative 16-bit
Thumb Mode reduces code by more than 30% with minimal performance penalty. With their
compact 64 pin package, low power consumption, various 32-bit timers, 4- channel 10-bit ADC,
USB PORT,PWM channels and 46 GPIO lines with up to 9 external interrupt pins these
microcontrollers are particularly suitable for industrial control, medical systems, access control
and point-of-sale. With a wide range of serial communications interfaces, they are also very
well suited for communication gateways, protocol converters and embedded soft modems as
well as many other general-purpose applications.
This project uses two power supplies, one is regulated 5V for modules and other one is
3.3V for LPC2148. 7805 three terminal voltage regulator is used for voltage regulation. Bridge
type full wave rectifier is used to rectify the ac out put of secondary of 230/12V step down
transformer.
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Block Diagram: Transmitter
Zigbee
Receiver
Step
Down
T/F
Bridge
Rectifier
pc
MAX
232
Filter
Circuit
Regulator
Power supply to all sections
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Block Diagram: Receiver
Gas
Sensor
Temperature
A
U
D
A
C
R
MAX 232
Zigbee
T
Sensor
ARM 7 TDMI
LPC2148
DC
Geared
G
P
H-Bridge
Motor 1
I
O
DC
Geared
Motor 2
Lead
Acid
Batter
y
Bridge
Rectifier
Filter
Circuit
Regulator
Power supply to all sections
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Advantages:

Reliability

Ease of Operation

Useful to detect harmful gases

Can be used as electrolytic applications
Applications:

Can be used in Coal Mines to detect presence of dreadful gases.

In public places like shopping malls, etc, this project can be applied where public
safety is a major task.

In hospitals and sensitive areas also this project can be implemented.

In Marine Applications
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