1. Realization of Intelligence Monitoring System Based
on Remote Sensor Technology
Bin Zhu1, Manxiang Cao2, Jianqu Zhu3, Yong Tan1
1. School of Physics and Electron Engineering, Yangtze Normal University, Chongqing, China
2. Library of Yangtze Normal University, Yangtze Normal University, Chongqing, China
3. School of Electron Engineering, Chongqing University of Science & Technology, Chongqing, China
e-mail: zhubin_yznu@yahoo.cn
Abstract—With the continuous improvement of living standards,
people's demands on security also grow with each passing day. In II. MONITORING PRINCIPLES
order to achieve safety monitoring on important places or Wireless remote monitoring system is mainly used
valuables, a new intelligence monitoring system was designed and pyroelectric infrared sensor which used lead zirconium titanate
implemented. It took the wireless sensor technology and the ferroelectric ceramic as the electrode materials, this material
embedded control technology as the foundation. At the same time,
will produce the same amount and opposite sign of charge at
it realized the wireless remote communication with GSM mobile
communication technology. The structure, function and working
both ends, when it is heated, this change generated due to
principle of the wireless remote monitoring system were thermal polarization phenomenon, known as the pyroelectric
introduced. The hardware and software of the system were all effect. Typically, the crystal bound charge that is generated
designed and realized. It achieved wireless remote monitoring on from its polarization was neutralized by the charged particles
important places and valuables finally. Experimental results from the air, and its self-polarization electric moment can not
show that the wireless remote monitoring system works well and be shown. When the infrared light injected into the crystal,
has the stable data collection and transmission quality. It has a Crystal temperature changes after the Infrared light is absorbed
high value for practical application. by crystal, The positive and negative charge gravity center in
the crystal occurs relative displacement, the Charge at the
Keywords-wireless sensor technology; remote monitoring; crystal surface will be exhausted, The degree of depletion is
global system for mobile communications; system implementation proportional to the charge polarization [1], Forming principle
of the Pyroelectric effect was shown in Figure 1.
I. INTRODUCTION Assuming in the time dt, crystal temperature changes d T .
With the increasing improvement of living standards, This will lead to polarization intensity variations in dp. Current
People put higher security requirements for theirs important surface density that the crystal surface generated and
places and personal items, such as home, office, car, etc. perpendicular to the polar axis can be expressed as follows.
Currently, the type of monitoring system that used for security
protection is a lot, but most are based on wired network, and
monitoring information is difficult to promptly notify the user. dp dp d T
J (1)
To this end, the research group completed a wireless remote dt d T dt
monitoring system designation and implementation through the
combination of sensor technology and the GSM mobile
communication technology. The system sends monitoring
information is not dependent on the wired telephone system,
but with a reliable, mature GSM mobile network. The
monitoring information is sent to the user's mobile phone or
residential security control center in an intuitive form of
Chinese short message, and gain time for the user to avoid
possible property damage. This system can effectively prevent
human damage by switching AC-DC power supply
automatically. It can still work in the absence of market power;
this function can improve the reliability of the system. Figure 1. The pyroelectric effect forming principle
Moreover, the system also has a key function of the alarm.
When at risk of emergency situations, such as the car was This operator dp / d t is called thermoelectric coefficient.
robbed, users can easily send text messages to friends and
It is expressed with P, and then J can be expressed as follows.
relatives for help by using the one key alarm function, and the
relatives and friends can take appropriate measures to rescue
after receiving the alarm message. d T
J P (2)
dt
978-1-4577-1415-3/12/$26.00 ©2012 IEEE
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2. If sinusoidal light was injected into the crystal, the contactor of the security system by sending SMS, thus control
sinusoidal light angular frequency is , and its amplitude of the the electrical appliance in home.
power is W0, then the radiation can be expressed with
GSM-based intelligence monitoring system consists of
W (t ) W0 e j t . Assumed the absorption rate of the sensor is a, wireless sensor module, the wireless receiver module, the
then decoder circuit module, HT46R22 MCU, on-site alarm unit,
GSM communication module and power supply components,
as shown in figure 2. CPU uses HT46R22 A/D chip which was
d T (3) produced by Holtek Semiconductor Inc. The anti-interference
aW (t ) aW0e j t
HT GT T
dt ability of HT46R22 microcontroller is strong. It is suitable for
use in high frequency environments [3]. The wireless receiving
The HT in this formula is the crystal thermal capacity, GT is module take sc2262 as the coding chip and the decoding circuit
the thermal conductivity that the crystal exchange heat with the module take sc2272 as the decoding chip. External oscillation
surrounding environment. resistor should be suitably adjusted according to need, when
SC2262 encoding chips in practical applications. This can
Using initial conditions t=0 T=0, solving this equation
avoid that the send time is too long which caused by large
with Laplace transform method, crystal temperature variation
coding width. The on-site voice alarm adopts the 12-second
T(t) is voice recorder module which using large-scale integrated
aW0 circuit technology. With the SMD ultra small design, electricity
T (t ) ej t
(4) voice preservation, micro power consumption, and clear sound
GT j H T quality, it can achieve arbitrary length of the voice alarm
Assuming the electrode area is A, the current that the through the software procedure.
crystal produced can be expressed. GSM communication module is realized by using
AT89C51 and TC35i wireless modem. TC35i is designed by
Siemens special module, designed for GSM communication, it
d T APaW0 has a voice, data, fax and point-to-point short message function,
I AJ A P (5)
dt GT j e j t
work on the EGSM900 and GSM1800 bands, support for
GSM7.07 and SM7.05 communication standard [4], It also has
Then through the impedance converter, it can realize the Mike, earphone interface and the standard RS232 interface.
transformation from infrared signal changes to voltage signal TC35i main characteristics and technical indicators include the
changes [2]. following: Support data, voice, short message and fax; a high
degree of integration (54.5mm*36mm*3.6mm); the quality of
III. SYSTEM HARDWARE IMPLEMENTATION 9g; the voltage of the power supply is a single voltage of
3.3~4.8V; selectable baud rate 300bps~115kbps, 4.8~115kbps
The human body in constant temperature can emit about dynamic baud rate; Current consumption in a dormant state for
10um wavelength infrared. Pyroelectric infrared sensors 3.5mA, idle 25mA emission state, 300mA (average), 2.5A
generate an alarm trigger signal when receiving the infrared peak; Normal operating temperature range of -20 ~+55 ;
radiation of human body. After the processing of the infrared SIM working voltage range is 3V/1.8V. GSM communication
alarm, alarm trigger signals are sent to the user's mobile phone module is controlled by HT46R22 single chip microcomputer,
through the GSM network. In order to prevent vandalism, It uses TDL-9915A high frequency module receives the user
signal transmission using wireless mode which can improve the remote controller and distributed in the monitoring region of
reliability of the system. Considering the lag of the warning the infrared sensor, vibration sensor and a radio signal from a
processing, monitoring system was designed possessing on-site door, with stable performance, high sensitivity, low power
alarm. At the same time, the user can control the relay or consumption.
Figure 2. The hardware block diagram of wireless remote monitoring system
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3. IDE, the main component is HT-ICE (In-Circuit Emulator),
IV. SYSTEM SOFTWARE IMPLEMENTATION which provides an 8 bit single chip microcomputer real time
simulation function, and has a strong error correction and
A. SMS send and receive tracking function. At power-up, system initialization, and self-
The transmission of System remote control commands and test, and self-test state prompting sound. After the end of self-
remote alarm information is completed through short message test, the system began to detect whether the mobile phone
(SMS). SMS information Sending and receiving in two ways: sends a deployment signal. After the receiving of GSM
Text mode and PDU mode. The Text model is pure text, can deployment signal which was send by mobile phone, system
use a different character set. The mode of information begins to enter the deployment state. When the received of
transmission and reception of the code is relatively simple, but wireless signal which sent from the remote site, a site remote
the domestic mobile phone in Text mode does not support the from a radio signal, the first system of the signal recognition,
Chinese characters in the short message transceiver. The PDU The system complete signal recognition immediately, If the
mode supported by all mobile phone can send text messages in signal is disarm or deployment signal, then it enter the disarm
English. PDU mode can be used are 7, 8 and UCS2 three or arm state correspond. If the received signal is the wireless
encoding, are used to send ordinary ASCII characters, the data alarm signal which was send by sensor in scene, then analyzing
message and the Unicode character (according to GSM07.05 the alarm address, start the alarm at the scene, and Send the
agreement provision, mobile phone short message in the corresponding Chinese short message to the user's mobile
Chinese characters coding using Unicode code). Therefore, phone. If the system receives the GSM disarm signal, the
send and receive Chinese or English mixed messages can only system enters into a garrison state, At this time, discarded the
use PDU mode, and the short message is transmitted to the field signal, The flow diagram of main program as shown in
remote user, complete Chinese characters coding to Unicode figure 4.
code conversion [5] [6].
When the display of SMS short message, we may use
different character sets and different coding modes. The
application which one can read the SMS short message must
use of either text mode, or PDU mode. If you use the Text
mode, then the application will be restricted in some possible
encoding selection, This may occur not available in some cases;
If you are using PDU mode, so you can use any coding [7].
The flow of SMS send and receive information are shown in
Figure 3.
Starts to Start
send receiving
Extract the outgoing Y
A new message?
message content
N
Organize the data Extract the received
according to the frame
structure data
PDU coding PDU decoding
Use AT commands to Extraction of short
send data message
End End
SMS sending process SMS receiving process
Figure 3. The flow chart of SMS sending and receiving
B. The main program implementation
The development of the system main program is completed
in a special integrated development environment HT-IDE
which was developed by Holtek Semiconductor Inc. In HT- Figure 4. The software flow chart of the wireless monitoring system
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4. V. CONCLUSION
Through the practical networking operation, the function of
the system, such as GSM remote arming and disarming, field
remote arming and disarming, on-site emergency alarm, remote
control, GSM remote alarm, remote monitoring (GSM
deployment of state by a mobile phone for live sound signal
remote monitoring), AC/DC power supply automatic switching,
and so on, is running normally, The system can realize the
effective monitoring for remote target, and has broad market Figure 6. The test results map
prospects, The physical map and of the system was shown in
figure 5, and the test results of the system was shown in figure
6. ACKNOWLEDGMENT
This work is supported by the classmate in school of
electrical engineering of Southwest Jiaotong University and the
colleague in Yangtze Normal University. The authors thank the
editors and reviewers for their valuable comments and good
suggestions.
REFERENCES
[1] Li Jian. Principle Of Pyroelectric Infrared Sensor And Its Application [J].
Sensor World, 2005.07:34-35
[2] Lee MH. Pyroelectric sensors [J]. Journal of Electroceramics, 1998, 2(4).
229-242.
[3] Holtek Semiconductor Inc. HT46R47/HT46R22/HT46R23/HT46R24 A/
D type MCU's manual [M], Holtek Semiconductor Inc, 2005:7-11
[4] QIN Long; QIAN Lin-jie; WANG Yu-mei. System for environment s
Figure 5. The physical map and of the system surveillance and control based on GSM[J]. Computer Engineering and
Design,2006,27(6):1033-1035
[5] ZHANG Xiao-pei; LI Xiang. ISN Diversion From Unicode to GBK [J].
Microcomputer Applications, 2006,27(6):757-759.
[6] Ma Yun-feng. Design of MIMU/GPS Navigation Computer[J].
Computer Measurement & Control, 2009,17(3):549-551.
[7] Ge Yong-ming, Cheng Wen-feng, Rao Kun. Realization of Remote
Wireless Monitoring System with General-utility Based on SMS [J]. ,
Computer Measurement & Control, 2009,17(5):869-871.
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