CN202711046U

CN202711046U - Singlechip remote data acquisition system

Info

Publication number: CN202711046U
Application number: CN2012203921419U
Authority: CN
Inventors: 刘静; 赵宇弛; 张利国; 尹小翠; 吕晓昶; 李峰; 王海英; 曹雪
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2012-08-09
Filing date: 2012-08-09
Publication date: 2013-01-30
Anticipated expiration: 2022-08-09

Abstract

The utility model relates to a singlechip remote data acquisition system, and aims to solve the problems of complicated structure and expensive cost of existing remote data acquisition system. The singlechip remote data acquisition system is characterized in that: the system further comprises 8 paths of analog switches, a double-integrating A/D converter, an MAX232 interface circuit, a GPRS module and a computer terminal; acquisition data output ends of the 8 paths of analog switches are connected to an analog quantity signal input end of the double-integrating A/D converter, and a digital quantity signal output end of the converter is connected to a digital quantity signal input end of an AT89S52 singlechip; a digital quantity signal output end of the singlechip is connected to a to-be-converted signal input end in the MAX232 interface circuit, and a conversion signal output end of the MAX232 interface circuit is connected to a transmission signal input end of the GPRS module; and the GPRS communication module exchanges group information with the computer terminal through a TDMA channel. The singlechip remote data acquisition system has the advantages of good real-time performance, strong human-machine interaction capability, low cost and easy popularization.

Description

A kind of single-chip microcomputer remote data acquisition system

Technical field

The utility model relates to a kind of device that is applied in the remote data acquisition field.

Background technology

Along with the raising of automatic technology, remote data acquisition and tranmission techniques are widely used.These existing remote data acquisition systems, although the efficient of present acquisition precision and transmission is all very high,, but all have a common problem: that is exactly, in these systems, owing to all be to adopt the higher industrial controller of price to finish, therefore, price is high.

Summary of the invention

In order to solve the technical matters of mentioning in the background technology, the utility model provides a kind of single-chip microcomputer remote data acquisition system, this kind data acquisition system (DAS) utilizes GPRS network to realize remote collection and the transmission problem of single-chip data, has that real-time is good, interactive capability is strong, the with low cost and characteristics that are easy to promote.

The technical solution of the utility model is: this kind single-chip microcomputer remote data acquisition system, comprise an AT89S52 single-chip microcomputer, in addition, described system also comprises 8 path analoging switch, double integration A/D converter, a MAX232 interface circuit, a GPRS communication module and a terminal that is made of the ICL7109 chip that is made of the MAX308 chip; Wherein, described 8 path analoging switch are as the Gather and input end of 8 road analog datas, the image data output terminal of 8 path analoging switch is connected to the analog signals input end of described double integration A/D converter, and the digital quantity signal output terminal of double integration A/D converter is connected to the digital quantity signal input end of described AT89S52 single-chip microcomputer; The digital quantity signal output terminal of described AT89S52 single-chip microcomputer is connected to the signal input part to be converted in the MAX232 interface circuit, and the switching signal output terminal of MAX232 interface circuit is connected to the signal transmission input end of described GPRS communication module; Carry out the grouping information exchange by the TDMA channel between described GPRS communication module and the described terminal.

The utlity model has following beneficial effect: double integration A/D converter, single-chip microcomputer, MAX232 interface circuit and the such combination of GPRS communication module that this kind single-chip microcomputer remote data acquisition system utilizes 8 path analoging switch that the MAX308 chip consists of, is made of the ICL7109 chip, realize the data of Site Detection are reached the terminal of default IP, except field data being shown to have intuitively the effect at computer screen, and, system's production cost of building like this is extremely low, very practical.In addition, the data transmission in the native system adopts GPRS network, does not need the needed intermediary of wireless application converter, and native system has very strong extended capability simultaneously, changes namely applicable to various single-chip computer control systems a little.Therefore, native system is highly suitable for that the data acquisition amounts such as school, factory floor and enterprises and institutions are very not large, uses in the less demanding place of acquisition precision.Except production cost was low, native system also had using electricity wisely, can realize the advantage of Based Intelligent Control and man-machine interaction.

Description of drawings:

Fig. 1 is principle of compositionality synoptic diagram of the present utility model.

The electrical schematic diagram that shows AT89S52 single-chip microcomputer and MAX308 chip coupling part when Fig. 2 is implementation.

The electrical schematic diagram that shows AT89S52 single-chip microcomputer and ICL7109 chip coupling part when Fig. 3 is implementation.

The electrical schematic diagram that shows MAX232 interface circuit and GPRS communication module coupling part when Fig. 4 is implementation.

Embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

By shown in Figure 1, this kind single-chip microcomputer remote data acquisition system, comprise an AT89S52 single-chip microcomputer, in addition, described system also comprises 8 path analoging switch, double integration A/D converter, a MAX232 interface circuit, a GPRS communication module and a terminal that is made of the ICL7109 chip that is made of the MAX308 chip; Wherein, described 8 path analoging switch are as the Gather and input end of 8 road analog datas, the image data output terminal of 8 path analoging switch is connected to the analog signals input end of described double integration A/D converter, and the digital quantity signal output terminal of double integration A/D converter is connected to the digital quantity signal input end of described AT89S52 single-chip microcomputer; The digital quantity signal output terminal of described AT89S52 single-chip microcomputer is connected to the signal input part to be converted in the MAX232 interface circuit, and the switching signal output terminal of MAX232 interface circuit is connected to the signal transmission input end of described GPRS communication module; Carry out the grouping information exchange by the TDMA channel between described GPRS communication module and the described terminal.

During implementation, by shown in Figure 2, the data input unit of single-chip microcomputer remote data acquisition system is by the switching of multi-way switch MAX308 control multiple signals.MAX308 is single 8 path analoging switch, each switch by the outside input binary address code A0, A1, A2 switches.Wherein

1,15 and 16 is input ends of address code A0, A1, A2; Input pin A0, A1, A2 link to each other with single-chip microcomputer P1.0-P1.2 respectively, and changing P1.0-P1.2 output is changeable input channel.

By shown in Figure 3, ICL7109 is that conversion accuracy is 12 A/D converter, and has good compatibility with the AT89S series monolithic, can directly link to each other with the AT89S series monolithic.The MODE pin ground connection of ICL7109 makes it be operated in the direct way of output among the figure; The RUN/HOLD pin connects+and the 5V power supply can change ICL7109 continuously; The STATUS pin with whenever finish once conversion after the INT0 of AT89S52 links to each other and just send out interrupt request one time to AT89S52.Adopted the crystal oscillator of 3.85MHZ, ICL7109 finishes and once changes required time T=8192(recurrence interval) x58/3.85MHZ=132.72ms, namely switching rate is 7.5 times/second.Wherein ICL7660 is+the electric power polarity transducer of 5V input-5V output.Be to utilize the negative edge of STATUS to send out interrupt request singal among the figure, 12 bit data will be read at twice in interrupt service routine, use respectively HBEN, LBEN control, and the sign that can obtain simultaneously polarity and whether overflow.

Can utilize the ICL7660 module in the native system ,+5V input is transformed to-the electric power polarity transducer of 5V output.During implementation, utilize the negative edge of STATUS to send out interrupt request singal, 12 bit data will be read at twice in interrupt service routine, use respectively HBEN, LBEN control, and the sign that can obtain simultaneously polarity and whether overflow.C7, C10 adopt 10uF tantalum electric capacity, to improve power supply conversion efficiency.When UDD ﹤+6.5V, 5 pin can be directly as output, and be about to 5 pin and meet output terminal Uo along dotted line: when UDD ﹥ 6.5V, for avoiding defective chip, output circuit need seal in diode D, and the output current of this circuit should not surpass 10mA.

By shown in Figure 4, computer serial ports RS232 level is-10v and+10v, and the signal voltage of general scm application system is Transistor-Transistor Logic level 0+5v, so utilize MAX232 to carry out level conversion, this device comprises 2 drivers, 2 receivers and 1 voltage generator circuit, and the TIA/EIA-232-F level is provided.This device meets the TIA/EIA-232-F standard, and each receiver becomes the TIA/EIA-232-F level with each transmitter of TIA/EIA-232-F level conversion one-tenth-5V TTL/CMOS electricity with the TTL/CMOS level conversion.

At last, cross the terminal server that the GPRS module sends to assigned ip after the AT89S52 single-chip microcomputer will be processed the analog quantity of input and with data communication device.Terminal server is as host computer, and its software can be worked out based on the VC++ program, and the binding of this software transfer ICP/IP protocol and IP address, internet makes terminal server can realize that teledata shows and the record operation.Simultaneously, this interface is very directly perceived, simple and easy.

Claims

1. single-chip microcomputer remote data acquisition system, comprise an AT89S52 single-chip microcomputer, it is characterized in that: described system also comprises 8 path analoging switch, double integration A/D converter, a MAX232 interface circuit, a GPRS communication module and the terminal that is made of the ICL7109 chip that are made of the MAX308 chip; Wherein, described 8 path analoging switch are as the Gather and input end of 8 road analog datas, the image data output terminal of 8 path analoging switch is connected to the analog signals input end of described double integration A/D converter, and the digital quantity signal output terminal of double integration A/D converter is connected to the digital quantity signal input end of described AT89S52 single-chip microcomputer; The digital quantity signal output terminal of described AT89S52 single-chip microcomputer is connected to the signal input part to be converted in the MAX232 interface circuit, and the switching signal output terminal of MAX232 interface circuit is connected to the signal transmission input end of described GPRS communication module; Carry out the grouping information exchange by the TDMA channel between described GPRS communication module and the described terminal.