CN109799739A - A kind of design of data acquisition system based on CAN bus technology - Google Patents
A kind of design of data acquisition system based on CAN bus technology Download PDFInfo
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- CN109799739A CN109799739A CN201711140785.2A CN201711140785A CN109799739A CN 109799739 A CN109799739 A CN 109799739A CN 201711140785 A CN201711140785 A CN 201711140785A CN 109799739 A CN109799739 A CN 109799739A
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Abstract
The present invention relates to a kind of design of data acquisition system based on CAN bus technology, the present invention proposes a kind of remote data acquisition system method based on CAN bus structure, CAN bus technology is applied in industrial field control, devises hardware circuit and software, and obtain practical application.The present invention can realize the real-time acquisition and transmission to 8 tunnel sensor signals in complicated ocean, have many advantages, such as structure simply, it is reliable performance, long transmission distance, cheap.
Description
Technical field
The invention patent relates to electronic design art more particularly to a kind of data acquisitions based on CAN bus technology
System design.
Background technique
In marine environment, farther out due to measure field offshore, bad environments, it is necessary to by measuring device and computer system point
It opens, constitutes remote data acquisition system.There are two types of the data transfer mode of remote data acquisition system is general: frequency quantity transmission and
Serial communication.Frequency quantity strong antijamming capability, be convenient for Long Distant Transmit, but this long-range frequency measurement be generally only applicable to it is several
Ten hertz of lower frequency ranges below.In serial communication, RS-232 communication standard message transmission rate is slow (usually asynchronous logical
Rate limit is believed in 19.2kbps or less), and transmitting range is short (general cable length is 15m), is not suitable for teledata and adopts
Collecting system；The communication standards such as RS-449, RS-422 and RS-423, real-time be not strong；RS-485 can only constitute primary and secondary structure system
System, communication mode can only also be carried out in a manner of main website poll, and real-time, the reliability of system are poor；And when system appearance is more
When node sends data to bus simultaneously, it will lead to bus and short circuit be presented, thus the phenomenon that damaging certain nodes.
CAN (Controller Area Network) bus belongs to the scope of fieldbus, it is a kind of effectively support point
The serial communication network of cloth control or real-time control.The physical layer and data of CAN protocol are integrated in CAN bus communication interface
Link layer functionality, the achievable framing processing to communication data.The maximum feature of one of CAN protocol is with having abolished traditional station
Location coding, and instead communicating data block is encoded.In this way the advantages of is that the node number in network is made to exist
Theoretically unrestricted, the identification code of data block can be made of 11 or 29 bits, therefore can define 211 or 229
A different data block, it is this in the way of data block coding, it can also make different nodes while receive identical data.Number
It is 8 bytes according to segment length, will not occupies that bus time is too long, to ensure that the real-time of communication.CAN protocol uses CRC
Corresponding error handle function is examined and be can provide, ensure that the reliability of data communication.
Patent of invention content
The invention patent relates to a kind of design of data acquisition system based on CAN bus technology, the present invention proposes a kind of based on CAN
CAN bus technology is applied in industrial field control by the remote data acquisition system method of bus structures, devises hardware electricity
Road and software, and obtain practical application.
The present invention can realize the real-time acquisition and transmission to 8 tunnel sensor signals in complicated ocean, have structure letter
List, reliable performance, long transmission distance, it is cheap the advantages that.
Detailed description of the invention
Fig. 1: the structural block diagram of long-range underwater data acquisition system.
Fig. 2: the structural block diagram of SCM system.
Fig. 3: singlechip main program flow chart.
Fig. 4: mainframe program flow chart.
Specific embodiment
In order to which the objects, technical solutions and advantages of the invention patent are more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the invention patent.It should be appreciated that specific embodiment described herein is only used to explain
The invention patent is not intended to limit the present invention patent.
The invention patent relates to a kind of design of data acquisition system based on CAN bus technology, the present invention proposes a kind of base
In the remote data acquisition system method of CAN bus structure, CAN bus technology is applied in industrial field control, is devised
Hardware circuit and software, and practical application is obtained, the present invention can realize in complicated ocean to the real-time of 8 tunnel sensor signals
Acquisition and transmission, have many advantages, such as structure simply, it is reliable performance, long transmission distance, cheap.
Further, remote data acquisition system requires sensor and measuring device to be located at measure field, computer system
On the coast or on ship, distance is often in several hundred rice between them, and even up to several kilometers sometimes.Therefore, connecting wire is few, maintenance
Expense is low to be just particularly important.Measuring system herein is directed to magnetic field (3 component), electric field (3 component), (2 points of dip angle parameter
Amount), long-range underwater data acquisition system is constructed with CAN, using 3 measuring nodes, respectively to above-mentioned 8 tunnel sensor signal reality
Acquisition and transmission when real.The structural block diagram of long-range underwater data acquisition system is as shown in Figure 1.
Further, CAN (Controller Area Network) bus belongs to the scope of fieldbus, it is a kind of
Effectively support the serial communication network of distributed AC servo system or real-time control.The object of CAN protocol is integrated in CAN bus communication interface
Manage layer and data link layer functions, the achievable framing processing to communication data.
Further, remote data acquisition system mainly consists of two parts: reception processing unit point and subaqueous survey on the bank
Device.In order to extend the use time of battery, the on-off of subaqueous survey body portion battery supply is controlled from the bank.Data acquisition
System uses four core longitudinal sealing seawater cables, and two-way transmits data, and another two-way controls battery supply.
Further, sensor of the invention uses magnetic field three-component measurement module, electric field three-component measurement module, inclination angle
2 component measurement modules.Each signal is amplified and filtered in signal processing circuit, amplification uses two panels LM148 four high guaily unit, filter
Wave device is the cascade for two active low-pass filter second order sections being made of operational amplifier.SCM system believes electric field three-component
Number, totally 8 road signals gate in turn and are sent into A/D and are converted for magnetic field three component signal and two attitude angle signals, A/D conversion is selected
16 chip ADS7805 of B-B company production, input voltage range are ± 10V, and output 16 and 8 is optional, used here as
The output of 16 parallel-by-bits, control signal are generated by mouth line P1.0, P1.1 and P1.2 of single-chip microcontroller, the structural block diagram of SCM system
As shown in Figure 2.Single-chip microcontroller is the microcontroller P87C592 for having piece CAN function again using PHILIPS's, and crystal oscillator frequency is
16MHz, P0 mouthfuls and P2 mouthfuls are used as data line and address wire, the P4 mouthfuls and P5 mouthfuls most-significant bytes and low 8 as 16 analog-digital converters
Bit parallel data line.P1.6, P1.7 are used for CAN bus, and a multiplexer MAX308 is selected in P1.2, P1.3 and P1.4 control eight
Channel.PC82C250 is CAN bus transceiver, is the interface between CAN controller and physical bus, provides the driving to bus
Transmitting capacity, the differential transmitting capacity to CAN controller and the differential reception ability to CAN controller.It has very strong anti-wink
Between interfere and protection bus ability；There is 3 kinds of different working methods i.e. high speed, slop control and standby.Certain section in bus
Point power down will not influence bus, realize high-speed applications up to 1 Mbps in 40 m.Host receiving end uses PCL-841, PCL-
841 can be directly inserted in the ISA extension slot of computer, and computer is PCL-41 storage allocation address, and as in standard
It deposits and is written and read, memory address can be set as any of 40 base address into EF00H C800H by wire jumper.It is built-in
The CAN bus communication card of CAN controller, it provides bus arbitration and error detection and weighs sending function automatically, so as to avoid
Loss of data ensure that the reliability of system.
Further, software design of the invention includes two parts, that is, SCM program and host control and data processing journey
Sequence.SCM program mainly includes node initializing program, message sends program, message receives program and CAN bus error
Processing routine etc..Singlechip main program flow chart is as shown in figure 3, program is write with C51 language.CAN controller carrys out CPU
Say be to ensure that the register image peripheral equipment that both sides work independently occurs, state between microcontroller and CPU, control and
The exchange of order is all by completing under reset mode or operating mode to the read-write of these registers.Initialize CAN
Notice that Er Qiejie, hair both sides must synchronize so that the bit rate of each node must be consistent when internal register.Send a frame data
Using high speed DMA, it allowed within most 2 periods, transmitted a complete message (most between CAN controller and main RAM
More 10 bytes).The very big enhancing of CPU function, which is due to High Speed Transfer, to be completed on backstage.Primary successfully DMA transmission
DMA bit is reset afterwards.DMA transmit during, CPU can handle next instruction, however, do not allow to data memory,
The access of CANADR, CANDAT, CANCON or CANSTA.After setting DMA bit, each interruption is prohibited, until transmission terminates.It is multiple
(reset request position is height) not can be carried out DMA transmission during the state of position.For the real-time for improving communication, during the reception of message uses
Disconnecting debit's formula also can guarantee that receiving buffer is not in data spillover in this way.
Further, mainframe program of the invention includes measuring and controlling subprogram, the sub- journey of communicator procedure, data processing
Sequence etc..DATA REASONING and control subprogram, which are used to control slave computer, to be measured, and communication subprogram sends according to communication protocol and controls
Measurement data is ordered and received to system, and data processing subprogram realizes the pretreatment and storage to data.Mainframe program is compiled with C language
It writes.Mainframe program process is as shown in Figure 4.
The above description is only a preferred embodiment of the patent of the present invention, is not intended to limit the invention patent, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the invention patent within the spirit and principle of patent of invention
Protection scope within.
Claims (3)
1. the invention patent relates to a kind of design of data acquisition system based on CAN bus technology, the present invention proposes that one kind is based on
CAN bus technology is applied in industrial field control by the remote data acquisition system method of CAN bus structure, devises hard
Part circuit and software, and obtain practical application.
2. a kind of design of data acquisition system based on CAN bus technology according to claim 1, which is characterized in that this
Invention can realize the real-time acquisition and transmission to 8 tunnel sensor signals in complicated ocean.
3. a kind of design of data acquisition system based on CAN bus technology according to claim 1, which is characterized in that this
Invention is mainly made of reception processing unit on the bank point and underwater measurement devices two parts.
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| CN201711140785.2A CN109799739A (en) | 2017-11-16 | 2017-11-16 | A kind of design of data acquisition system based on CAN bus technology |
Applications Claiming Priority (1)
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| CN201711140785.2A CN109799739A (en) | 2017-11-16 | 2017-11-16 | A kind of design of data acquisition system based on CAN bus technology |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001237838A (en) * | 1999-10-30 | 2001-08-31 | Tlc Transport Informatik & Logistik-Consulting Gmbh | Method and system to unifiedly control terminal |
| CN104166362A (en) * | 2014-08-28 | 2014-11-26 | 杭州墨锐机电科技有限公司 | Deep sea drilling machine geology sampling electronic monitoring system |
| CN104280056A (en) * | 2014-10-27 | 2015-01-14 | 中国科学院上海高等研究院 | Modular embedded type sensor monitoring system |
| CN104914769A (en) * | 2015-06-19 | 2015-09-16 | 陕西法士特齿轮有限责任公司 | CAN bus-based data acquisition system and acquisition processing method |
-
2017
- 2017-11-16 CN CN201711140785.2A patent/CN109799739A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001237838A (en) * | 1999-10-30 | 2001-08-31 | Tlc Transport Informatik & Logistik-Consulting Gmbh | Method and system to unifiedly control terminal |
| CN104166362A (en) * | 2014-08-28 | 2014-11-26 | 杭州墨锐机电科技有限公司 | Deep sea drilling machine geology sampling electronic monitoring system |
| CN104280056A (en) * | 2014-10-27 | 2015-01-14 | 中国科学院上海高等研究院 | Modular embedded type sensor monitoring system |
| CN104914769A (en) * | 2015-06-19 | 2015-09-16 | 陕西法士特齿轮有限责任公司 | CAN bus-based data acquisition system and acquisition processing method |
Non-Patent Citations (1)
| Title |
|---|
| 嵇斗等: "一种基于CAN总线技术的数据采集系统设计", 《微计算机信息》 * |
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Application publication date: 20190524 |