qstr可燃气体报警器中英文对照外文翻译文献

2021年1月19日发(作者：奶子)
可燃气体报警器中英文对照外文翻译文献




可燃气体报警器中英文对照外文翻译文献


(
文档含英文原文和中文翻译
)



原文
：

Design of Combustible Gas Detection system using Wireless

Keywords
:TGS813, AT89S52, DS18B20, nRF905, TC35i
Abstract
.The
detection
device
of
combustible
gas
are
designed
in
the
presented
work,using
wireless transceiver and GSM system realize the wireless transmission of the gas
concentration,and also can send alarm information to user’s mobile when an exception occurs.
The system consists of two parts: a master and slave. The function of the slave is to collect data,
process
data
and
transffer
the
data
to
the

taskof
the
master
is
to
receive
data
and
display it by LED.
第
1
页

可燃气体报警器中英文对照外文翻译文献


The
signal
acquisition
is
completed
by
sensor
TGS813
and
A/D
converter
TLC2543.
The
wireless transmission is achieved through wireless transceiver nRF905. Since the accuracy of the
sensor
is
affected
by
the
environment,using
DS18B20
to
achieve
temperature
compensation.
And with wireless communication module TC35i and GSM network platform, we can send the

alarm information to use
r’s mobile promptly.

Introduction
Gas detection is widely used in petroleum, chemical, metallurgy, family, shopping malls,

gas stations and other places. Currently, how to monitor the hazardous gas fast and accurately
are the important issues. Although the gas detection technology is relatively
mature, but most
products has many shortcomings, such as single function, operating complex, bulky, expensive
and low sensitivity. Wireless communication technology applied to the gas monitoring field, can
resolve the problem of remote monitoring in special environment, such as high temperature, low
temperature, toxic unable to wiring .
In
the
presented
work,
the
combustible
gas
detectoris
fully
functional
(with
wireless
transceiver), simple, small size, low
cost, and has high sensitivity. The equipment can greatly
improve
the
system's
detection
capability
and
accuracy
with
temperature
compensation
algorithm, and also can send alarm information to the user's mobile phone promptly through the
GSM network.
System design

The system consists of two parts as shown in Figure 1.
Fig. 1 Overall system block diagram

The slave part mainly complete data collection and wireless transmission. The master
part mainly complete receiving data, displaying and sending alarm message.
The signal of gas concentration is collected by combustible gas sensor which generates a
weak electrical signal. The signal can be amplified and stabilized by conditioning circuit. And
then A/D circuit converts the analog signal to digital signal which microcontroller can process.
In order to improve the measurement accuracy, and reduce the impact of temperature, design a
temperature compensation circuit to collect tempreture data. AT89S52 process the collected
data and send data to the master by wireless transceiver.
The master receives the data and displays it by LED. And if the gas concentration being
abnormal,the system will drive speaker for an alarm signal and use TC35i module to send
alarm information to
user’s mobile.

第
2
页

可燃气体报警器中英文对照外文翻译文献


Hardware design
Signal acquisition and conditioning circuit.
Figure 2 shows data acquisition circuit. TGS813 is a Gas
sensing resistive sensor. The conductivity of TGS813 is influenced by the concentration of combustible
gases in air, the greater the concentration, the higher conductivity. In system R0, R9, R10 and RS (in
TGS813) form a bridge circuit to convert resistance to voltage signal. Operational amplifier A connected as
a voltage follower with resistors R7 and regulator D1 make up the voltage regulator circuit to supply power
for the bridge. In order to the voltage adapt to the A/D converter, the voltage is amplified by opamp B, and
the magnification can be adjusted through resistor R11.
Fig. 2 Gas concentration signal acquisition circuit
Fig. 3 Temperature compensation circuit


Temperature compensation circuit.
The resistance of Rs is greatly affected by temperature.
In order to improve system accuracy, the results must be temperature compensated or
temperature system, using temperature sensor DS1820 to collect temperature
signal, and using software method for temperature correction.
Wireless transmission module.
Wireless transceiver is achieved by a single-chip RF
transceiver nRF905. MCU and nRF905 realize data and commands interaction through the
SPI
typical application schematic is shown in Figure 4. The antenna part is 50Ω
single-ended communication frequency is 433MHz, and operating voltage is
3.3V. The value of resistors,capacitors and inductor is determined by the datasheet of nRF905.
GSM short message unit.
The interface circuit of TC35i and MCU is shown in Figure 5. The
communication between MCU and TC35i is via serial, and the rate is 9600bps.
Communicationsmode is 8-bit asynchronous with a start bit, 8 data bits, and 1 stop bit. But the
serial input of TC35i requires CMOS level, and serial output of 89C52 requires TTL level. In
order to achieve the voltage conversion the system use the way of resistors sharing voltage.
Fig. 4 nRF905 Application Schematic
第
3
页

可燃气体报警器中英文对照外文翻译文献


Fig. 5 TC35i and MCU interface circuit


Software Design
The software system includes data acquisition module, temperature compensation
module, and wireless transceiver module
Wireless sending program.
NRF905 data sending process is as follows:
1) When having data to send, the microcontroller send the receiver's address and the data to
nRF905 chronologically by the SPI placed the data to be transmitted into
TxBuf register, send WTP command to write the data to TX-Payload register, and send WTA
command to write TX address to the TX-Address register
.
2) The microcontroller set TRX_CE=1 and TX_EN=1 to stimulate nRF905 ShockBurstTM
sending mode. When data transmission completed, the data ready pin is set high;
3) Beacause of AUTO_RETRAN being high, the data of nRF905 is constantly re- issued until
第
4
页


可燃气体报警器中英文对照外文翻译文献


TRX_CE=0.
4) when TRX_CE pin is set low, means the data transmission completed and nRF905 enter
idlemode.
Wireless receiving program.
NRF905 data receiving process is as follows:
1)

When TRX_CE = 1 and TX_EN = 0, nRF905 enters ShockBurstTM receive mode
checking constantly and waiting for receiving data.
2)

When nRF905 detect the carrier having
same frequency band,
the carrier detect pin will be
set high.
3)

When nRF905 receive a matched address, the address matches pin will be set high.
4) When packet correctly received, the word head, address and CRC bits will automatically be
removed, and the data ready pin will be set high.
5) MCU set TRX_CE to
6) When all the data received, nRF905 set data ready pin and address matching pin to
nRF905 turn to shutdown mode or ShockBurstTM transmitmode and receive mode.

Fig.6 Wireless data transmission flow chart






Fig.7 Wireless data receiving flow chart






第
5
页

可燃气体报警器中英文对照外文翻译文献


Summary
Designed an equipment to detect the concentration of combustible gas, which has wireless
transceiver
functions and can send the alarm information to user’s mobile promptly through
mental results show that the devices have high precision, stability and reliability.
It can meet most applications which need real-time monitoring of combustible gas
concentration.
References
[1] Liu S, Chen Q, Wang H G, eat. Electrical capacitance tomography for gas solids flow
measurement for circulating fluidized beds [J].Flow Measurement and Instrumentation
，
2005
，
16(2-3):1 35-144.
[2] TGS 813-for the Detection of Combustible Gases [DB/OL].2009-08-12.
[3] Liu Wei, Chen HeXin
，

Zhang JunWei
，
etc. Intelligent control and alarm system based on
TC35i. IEEE.2008 International Symposium on Computer Science and Computational
Technology
(ISCSCT), Shanghai, 2008:80-83







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可燃气体报警器中英文对照外文翻译文献























译文
:
使用无线的可燃气体检测系统的设计



































关键词
：
TGS813
，
AT89S52单片机，
DS18B20
，
nRF905
，
TC35i
摘要
；可燃气体检测装置是在所提出的工作设计，使用无线收发器和
GSM
网络。该 系
统实现了气体浓度的无线传输，也可以发送报警信息到用户的移动发生异常时。该系统
由两部 分组成：一个主和奴隶。奴隶的功能是收集数据，处理数据和过渡到主数据。主
的任务是接收数据并通过
LED
显示。
信号采集由传感器
TGS813
和
A/D转换器
TLC2543
完成。无线传输是通过无线收发芯片
nRF905
实现。由于传感器的精度受环境的影响，
采用
DS18B20
实现温度补偿。与无线通 信模块
TC35i
模块和
GSM
网络平台，我们可
以发送报警信息到 用户的移动迅速。

简介；

气体检测广泛应用于石油，化工，冶金，家庭， 商场，加油站和其他地方。目前，
如何快速、准确地监测有害气体是一个重要的问题。虽然气体检测技术 已经比较成熟，
但大多数产品有许多不足之处，如功能单一，操作复杂，笨重，昂贵的和低灵敏度。无< br>第
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