CN102200763A - Grain status monitoring system based on fieldbus - Google Patents
Grain status monitoring system based on fieldbus Download PDFInfo
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- CN102200763A CN102200763A CN2010101296160A CN201010129616A CN102200763A CN 102200763 A CN102200763 A CN 102200763A CN 2010101296160 A CN2010101296160 A CN 2010101296160A CN 201010129616 A CN201010129616 A CN 201010129616A CN 102200763 A CN102200763 A CN 102200763A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention relates to a grain status monitoring system, belongs to the field of electrical and electronic techniques, computer techniques and automation and particularly relates to a grain status monitoring system based on a CAN (controller area network) fieldbus. The grain status monitoring system based on the CAN fieldbus comprises a management center computer (1), an RS-232 (recommended standard-232) conversion CAN fieldbus module (2), a fieldbus (3), a plurality of CAN fieldbus control terminals (4), a plurality of temperature sensors (5), a plurality of humidity sensors (6) and a plurality of contactors (7), wherein the management center computer (1) is used for completing the dynamic real-time display and accurate control of a monitoring interface, and the CAN fieldbus control terminals (4) are used for acquiring temperatures and humidities, and signals of the contactors (7), then transmitting the temperatures, humidities and signals to the management center computer (1). The grain status monitoring system provided by the invention is good in control real-time performance, vivid and accurate in monitoring interface, simple and efficient in circuit, strong in anti-jamming capability, less in cable, convenient to use and low in cost.
Description
Affiliated technical field
The invention belongs to electrical and electronic technology, computer technology and automatic field, be specifically related to a kind of based on fieldbus grain feelings supervisory system.
Background technology
The necessity that the grain mankind depend on for existence, annual all have a large amount of new grain results also to have the part grain in storage for years to overstock, if store improper a large amount of foodstuff waste that causes, can cause enormous economic loss so, and grain security is most important.The safety of grain in storing process mainly shows the temperature of grain and the variation of moisture, in case grain makes moist, its metabolism is accelerated and the generation respiration heat, local cereal temperature raises, make grain take place to go rotten rotten, as long as monitor the variation of the temperature and humidity of grain, just can grasp the situation of grain.Therefore, the safe storage of grain is the significant problem of puzzlement food administration unit always, improves the grain storage condition, improves the grain storage technical merit, promotes that the grain storage scientific-technical progress is imperative.The measure of in the past taking is with artificial way grain to be carried out airing, ventilates, and spraying agent prevents to have consumed great amount of manpower and financial resources because of storing the improper insect pest that causes, however poor effect, and phenomenons such as moldy metamorphism still exist.Along with electronic technology and development of computer, generally adopt electronics and computing machine to grain information monitoring and management at present, but a lot of unsatisfactory problems are arranged still,, loss of transmitted data poor such as interference free performance, host computer interface are not vivid etc., propose a kind of at these situations based on fieldbus grain feelings supervisory system, can reduce grain loss, increase farmers' income.
The field bus control system technology is the 20th century a kind of brand-new industrial control technologies that grow up on abroad of the mid-80.Fieldbus (fieldbus) is the system that is applied in the production scene, realizes the digital communication of bidirectional linked list multinode between the computerized measurement opertaing device, being also referred to as the bottom control network of open, digitizing, multi-point, is the integrated of on-scene communication network and control system.Along with the continuous enhancing of microprocessor and computer function and the reduction of price, computing machine and computer network system are just in fast development and expansion.Fieldbus can be realized the information integration of whole enterprise, implements comprehensive automation, forms factory's bottom-layer network, finishes the multipoint digital communication between the on-the-spot automation equipment, realizes between the bottom field apparatus and production scene and extraneous message exchange.Owing to adopt fieldbus will make control system simple in structure, system's erected cost reduces and is easy to safeguards that field bus technique just more and more is subject to people's attention.At present, the fieldbus that has occurred in the world has the hundreds of kind, and what certain influence is wherein typically arranged and occupy certain market share mainly contains foundation fieldbus (FF), CAN, PROFIBUS, Lonworks, HART etc.CAN (Controller Area Network controller local area network) bus is that the BOSCH company by Germany is a kind of many main frames of serial data communication LAN (Local Area Network) that automobile monitoring, control system design at first.
Summary of the invention
The objective of the invention is to propose a kind of based on fieldbus grain feelings supervisory system, to solve grain feelings monitoring problem, described technical scheme is as follows: a kind of based on fieldbus grain feelings supervisory system, described system comprises: management centre computer (1), RS-232 conversion CAN bus module (2) fieldbus (3), several CAN Fieldbus Control terminals (4), plurality of temperature sensor (5), several humidity sensors (6), several contactors (7).
Described management centre computer (1) adopts the pci bus Industrial Control Computer, go up mounting industrial control configuration software at management centre computer (1), design various grain feelings monitoring interfaces, management centre computer (1) also will be communicated by letter with each CAN Fieldbus Control terminal (4) by fieldbus (3) simultaneously, and the grain feelings are monitored in real time.Owing to the pci bus Industrial Control Computer has the CAN bus RS-232 interface is not arranged, so select RS-232 conversion CAN bus module (2) for use in order to be connected with fieldbus (3).Described fieldbus (3) is selected the CAN fieldbus for use, the CAN fieldbus is the very high fieldbus of a kind of popularity rate (fieldbus), the direct communication distance can reach 10km farthest, below the speed 5Kbps, traffic rate reaches as high as 1MbPs, communication distance is the longest at this moment is 40m, and node can reach 110 at present, and communication media can be twisted-pair feeder, concentric cable or optical fiber.Described CAN Fieldbus Control terminal (4) is to adopt the MCU intelligent terminal, being responsible for temperature and humidity measures and ventilation blower is controlled, information is sent to management centre computer (1), the control information of receiving management central computer (1), used CAN Fieldbus Control terminal (4) is according to grain storage enterprise and supervisory system decision.The novel 1-wire digital temperature sensor chip DS18B20 that described temperature sensor (5) selects for use U.S. DALLAS company to produce, it has simple in structure, do not need outward element, adopt an I/O data line not only can power but also can transmit data, and the characteristics of temperature alarming boundary can be set by the user.DS18B20 is widely used in the temperature control system of needs such as food storage, freezer, grain depot, greenhouse control temperature, therefore adopts DS18B20, and it has two kinds of power supply modes: directly power supply and parasitic power supply, adopt direct feeding system at this.The HIH-4000-1 chip that humidity sensor (6) selects for use U.S. Honeywell (Honeywell) company to produce, this is the monolithic integrated optical circuit that a type has the capacitive variation of laser adjustment exchange type, and its output voltage and RH value are linear, the precision height, response time is fast, and it is little to drift about.Under standard operation voltage (Dc5V) and normal room temperature (25 ℃), along with the RH value from 0～100%, corresponding output voltage is from 0.196～3.190V.The measurement humidity range is 0～100%RH, and precision is ± 3.5%RH that operating temperature range is-40～+ 85 ℃.Contactor (7) selects for use common A.C. contactor (7) to get final product.
Described CAN Fieldbus Control terminal (4) comprises that MCU single-chip microcomputer 2-1, CAN bus circuit 2-2, driving circuit 2-3, unibus circuit terminal 2-4, moisture signal modulate circuit 2-5 form.MCU single-chip microcomputer 2-1 selects the AT89C51CC01 single-chip microcomputer of Atmel company for use, the AT89C51CC0x series monolithic is as a member of MCS-51 microcontroller family, the kernel of its controller is 51 series monolithics, adopted powerful 80C51 instruction set also successfully to comprise the PeliCAN function of Philips semiconductor SJA1000CAN controller, complete static kernel provides the battery saving mode of expansion, oscillator can stop and recovering and obliterated data not, frequency divider is realized the 500ns instruction cycle when 12MHz external clock frequency during improved 1: 1 inside, AT89C51CC01 itself has the CAN bus controller by oneself, so do not need to add the CAN bus controller.Described CAN bus circuit 2-2 is management centre computer (1) and CAN Fieldbus Control terminal (4) communication interface, described driving circuit 2-3 plays power amplification and buffer action, described unibus circuit terminal 2-4 plays CAN Fieldbus Control terminal (4) and temperature sensor (5) effect of connecting, described moisture signal modulate circuit 2-5 nurses one's health into 0.00～5.00V voltage signal with humidity sensor (6) 0.96～3.90V voltage signals, so that MCU single-chip microcomputer 2-1A/D converter can received signal.
Described CAN bus circuit 2-2 comprises photoelectrical coupler 3-1, CAN bus transceiver 3-2, anti-lightning strike pipe 3-3, resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 1, capacitor C 2.Photoelectrical coupler 3-1 selects for use high speed photo coupling to isolate the 6N137 chip, at this with 2 6N137 chips, the TXDC pin of MCU single-chip microcomputer 2-1 is connected with a slice 6N137 chip I N pin by resistance R 1, the RXDC pin of MCU single-chip microcomputer 2-1 is connected with another sheet 6N137 chip OUT pin, CAN bus transceiver 3-2 selects the TJA1050 chip for use, a slice 6N137 chip OUT pin connects TJA1050 chip pin TXD, another sheet 6N137 chip I N pin connects TJA1050 chip pin RXD by resistance R 2, the CANH pin of TJA1050 chip is by resistance R 3, capacitor C 1, anti-lightning strike pipe 3-3 links to each other with the CAN bus node, and the CANL pin of TJA1050 chip is by resistance R 4, capacitor C 2, anti-lightning strike pipe 3-3 links to each other with the CAN bus node.
Described unibus circuit terminal 2-4 comprises unibus 4-1, unibus connection terminal 4-2,8 pin interface 4-3 of MCU single-chip microcomputer 2-1P0 mouth, 8 pin interface 4-4 of MCU single-chip microcomputer 2-1P2 mouth.Unibus 4-1 is a proprietary technology of DALLAS company.Unibus as its name suggests, has only a data lines, and it adopts not only transfer clock but also transmit data of single signal wire, and the transmission of data is two-way.Collecting temperature data at the scene, and the temperature data that measures is directly changed into digital quantity output with serial digital signal output, easily be connected with microcontroller.It has the I/O of saving mouth line resource, and is simple in structure, with low cost, the advantage of being convenient to the bus expansion and safeguarding.Described unibus connection terminal 4-2 is temperature sensor (5) and CAN Fieldbus Control terminal (4) connected node, 8 pin interface 4-4 of 8 pin interface 4-3 of MCU single-chip microcomputer 2-1P0 mouth and MCU single-chip microcomputer 2-1P2 mouth are connected on the unibus connection terminal 4-2, unibus connection terminal 4-2 is totally 16 terminals, each input terminal is received No. 8 temperature sensors respectively, in this maximum both 16 * 8=128 road temperature survey point, what, depend on the circumstances as for needs road temperature survey points.
The invention has the beneficial effects as follows:
1. the control real-time performance is good, and monitoring interface is vividly accurate.
2. circuit is simply efficient, and antijamming capability is strong.
3. cable is few, is convenient to use, and cost is low.
Description of drawings
Fig. 1 is a system architecture synoptic diagram of the present invention.
Fig. 2 is CAN Fieldbus Control terminal structure of the present invention and work connection diagram.
Fig. 3 is a CAN bus circuit structural representation of the present invention.
Fig. 4 is a unibus circuit terminal structural representation of the present invention.
Embodiment
The present invention is described in more detail with concrete enforcement below in conjunction with accompanying drawing.
The first step: as shown in Figure 1, go up mounting industrial control configuration software at management centre computer (1), design various grain feelings monitoring interfaces, management centre computer (1) also will be communicated by letter with each CAN Fieldbus Control terminal (4) by fieldbus (3) simultaneously, and each parameter of grain feelings is set.
Second step: and as shown in Figure 2 as Fig. 1, each CAN Fieldbus Control terminal (4), collecting temperature, humidity and contactor (7) signal is sent to management centre computer (1) by fieldbus (3), management centre computer (1) can show that management centre computer (1) sends instruction by fieldbus (3) to each CAN Fieldbus Control terminal (4) simultaneously to various grain feelings monitoring interface dynamic real-times.The 3rd step: management centre computer (1) can inquire about as required in real time and historical data, report printing, warning are handled.
Claims (4)
1. one kind based on fieldbus grain feelings supervisory system, it is characterized in that: comprise management centre computer (1), RS-232 conversion CAN bus module (2) fieldbus (3), several CAN Fieldbus Control terminals (4), plurality of temperature sensor (5), several humidity sensors (6), several contactor (7) seven parts.
2. as claimed in claim 1 a kind of based on fieldbus grain feelings supervisory system, it is characterized in that: described CAN Fieldbus Control terminal (4) comprises that MCU single-chip microcomputer 2-1, CAN bus circuit 2-2, driving circuit 2-3, unibus circuit terminal 2-4, moisture signal modulate circuit 2-5 form.MCU single-chip microcomputer 2-1 selects the AT89C51CC01 single-chip microcomputer of Atmel company for use, the AT89C51CC0x series monolithic is as a member of MCS-51 microcontroller family, the kernel of its controller is 51 series monolithics, adopted powerful 80C51 instruction set also successfully to comprise the PeliCAN function of Philips semiconductor SJA1000CAN controller, complete static kernel provides the battery saving mode of expansion, oscillator can stop and recovering and obliterated data not, frequency divider is realized the 500ns instruction cycle when 12MHz external clock frequency during improved 1: 1 inside, AT89C51CC01 itself has the CAN bus controller by oneself, so do not need to add the CAN bus controller.Described CAN bus circuit 2-2 is management centre computer (1) and CAN Fieldbus Control terminal (4) communication interface, described driving circuit 2-3 plays power amplification and buffer action, described unibus circuit terminal 2-4 plays CAN Fieldbus Control terminal (4) and temperature sensor (5) effect of connecting, described moisture signal modulate circuit 2-5 nurses one's health into 0.00～5.00V voltage signal with humidity sensor (6) 0.96～3.90V voltage signals, so that the MCU2-1A/D converter can received signal.
3. CAN bus circuit 2-2 as claimed in claim 2 is characterized in that: described CAN bus circuit 2-2 comprises photoelectrical coupler 3-1, CAN bus transceiver 3-2, anti-lightning strike pipe 3-3, resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 1, capacitor C 2.Photoelectrical coupler 3-1 selects for use high speed photo coupling to isolate the 6N137 chip, at this with 2 6N137 chips, the TXDC pin of MCU single-chip microcomputer 2-1 is connected with a slice 6N137 chip I N pin by resistance R 1, the RXDC pin of MCU single-chip microcomputer 2-1 is connected with another sheet 6N137 chip OUT pin, CAN bus transceiver 3-2 selects the TJA1050 chip for use, a slice 6N137 chip OUT pin connects TJA1050 chip pin TXD, another sheet 6N137 chip I N pin connects TJA1050 chip pin RXD by resistance R 2, the CANH pin of TJA1050 chip is by resistance R 3, capacitor C 1, anti-lightning strike pipe 3-3 links to each other with the CAN bus node, and the CANL pin of TJA1050 chip is by resistance R 4, capacitor C 2, anti-lightning strike pipe 3-3 links to each other with the CAN bus node.
4. unibus circuit terminal 2-4 as claimed in claim 2 is characterized in that: described unibus circuit terminal 2-4 comprises unibus 4-1, unibus connection terminal 4-2,8 pin interface 4-3 of MCU single-chip microcomputer P0 mouth, 8 pin interface 4-4 of MCU single-chip microcomputer P2 mouth.Unibus 4-1 is a proprietary technology of DALLAS company.Unibus as its name suggests, has only a data lines, and it adopts not only transfer clock but also transmit data of single signal wire, and the transmission of data is two-way.Collecting temperature data at the scene, and the temperature data that measures is directly changed into digital quantity output with serial digital signal output, easily be connected with microcontroller.It has the I/O of saving mouth line resource, and is simple in structure, with low cost, is convenient to advantages such as bus expansion and maintenance.Described unibus connection terminal 4-2 is temperature sensor (5) and CAN Fieldbus Control terminal (4) connected node, 8 pin interface 4-4 of 8 pin interface 4-3 of MCU single-chip microcomputer P0 mouth and MCU single-chip microcomputer P2 mouth are connected on the unibus connection terminal 4-2, unibus connection terminal 4-2 is totally 16 terminals, each input terminal is received No. 8 temperature sensors respectively, in this maximum both 16 * 8=128 road temperature survey point, what, depend on the circumstances as for needs road temperature survey points.
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| CN2010101296160A CN102200763A (en) | 2010-03-23 | 2010-03-23 | Grain status monitoring system based on fieldbus |
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| CN2010101296160A CN102200763A (en) | 2010-03-23 | 2010-03-23 | Grain status monitoring system based on fieldbus |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149375A (en) * | 2013-03-19 | 2013-06-12 | 郑州贝博电子股份有限公司 | Multipoint sampling and strobing device used for detecting condition of stored grain |
| CN103453933A (en) * | 2013-08-18 | 2013-12-18 | 吉林大学 | Agricultural machine working parameter integrated monitoring platform and using method thereof |
| CN103488128A (en) * | 2012-06-12 | 2014-01-01 | 郑州华粮科技股份有限公司 | Grain condition measurement and control remote monitoring system based on Internet |
| CN104460605A (en) * | 2014-11-12 | 2015-03-25 | 宁夏嘉翔自控技术有限公司 | CAN bus communication topological structure of control system of oil field boiler |
| CN104483874A (en) * | 2014-11-26 | 2015-04-01 | 哈尔滨金都太阳能科技有限公司 | Data collecting device based on single chip microcomputer |
| CN104483885A (en) * | 2014-11-12 | 2015-04-01 | 宁夏嘉翔自控技术有限公司 | CAN bus structure of oil field boiler control system |
| CN105137893A (en) * | 2015-05-13 | 2015-12-09 | 武汉理工大学 | Grain condition monitoring device and monitoring method |
| CN105225317A (en) * | 2015-10-03 | 2016-01-06 | 上海大学 | A kind of network access control system of multichannel centralized management |
| CN106017543A (en) * | 2016-04-21 | 2016-10-12 | 常州信息职业技术学院 | Electric power detection system based on CAN |
| CN110096016A (en) * | 2019-06-07 | 2019-08-06 | 兰州理工大学 | A kind of large cold storage FCS complex control system and fuzzy control method |
| CN114785869A (en) * | 2022-06-20 | 2022-07-22 | 陕西中测智能科技有限公司 | RS 232-to-one-wire protocol module and conversion method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103488128A (en) * | 2012-06-12 | 2014-01-01 | 郑州华粮科技股份有限公司 | Grain condition measurement and control remote monitoring system based on Internet |
| CN103488128B (en) * | 2012-06-12 | 2016-01-20 | 郑州华粮科技股份有限公司 | Based on the grain information monitoring remote monitoring system of internet |
| CN103149375B (en) * | 2013-03-19 | 2014-06-18 | 郑州贝博电子股份有限公司 | Multipoint sampling and strobing device used for detecting condition of stored grain |
| CN103149375A (en) * | 2013-03-19 | 2013-06-12 | 郑州贝博电子股份有限公司 | Multipoint sampling and strobing device used for detecting condition of stored grain |
| CN103453933A (en) * | 2013-08-18 | 2013-12-18 | 吉林大学 | Agricultural machine working parameter integrated monitoring platform and using method thereof |
| CN104460605A (en) * | 2014-11-12 | 2015-03-25 | 宁夏嘉翔自控技术有限公司 | CAN bus communication topological structure of control system of oil field boiler |
| CN104483885A (en) * | 2014-11-12 | 2015-04-01 | 宁夏嘉翔自控技术有限公司 | CAN bus structure of oil field boiler control system |
| CN104483874A (en) * | 2014-11-26 | 2015-04-01 | 哈尔滨金都太阳能科技有限公司 | Data collecting device based on single chip microcomputer |
| CN105137893A (en) * | 2015-05-13 | 2015-12-09 | 武汉理工大学 | Grain condition monitoring device and monitoring method |
| CN105225317A (en) * | 2015-10-03 | 2016-01-06 | 上海大学 | A kind of network access control system of multichannel centralized management |
| CN106017543A (en) * | 2016-04-21 | 2016-10-12 | 常州信息职业技术学院 | Electric power detection system based on CAN |
| CN110096016A (en) * | 2019-06-07 | 2019-08-06 | 兰州理工大学 | A kind of large cold storage FCS complex control system and fuzzy control method |
| CN114785869A (en) * | 2022-06-20 | 2022-07-22 | 陕西中测智能科技有限公司 | RS 232-to-one-wire protocol module and conversion method |
| CN114785869B (en) * | 2022-06-20 | 2022-11-25 | 陕西中测智能科技有限公司 | RS 232-to-one-wire protocol module and conversion method |
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Application publication date: 20110928 |