CN101866540A - Data acquisition unit based on wireless HART network - Google Patents
Data acquisition unit based on wireless HART network Download PDFInfo
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- CN101866540A CN101866540A CN 201010200469 CN201010200469A CN101866540A CN 101866540 A CN101866540 A CN 101866540A CN 201010200469 CN201010200469 CN 201010200469 CN 201010200469 A CN201010200469 A CN 201010200469A CN 101866540 A CN101866540 A CN 101866540A
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Abstract
The invention discloses a data acquisition unit based on wireless HART network, comprising an embedded type hardware platform, an embedded type operation system matched with the embedded type hardware platform and a complete wireless HART protocol stack; the complete wireless HART protocol stack is respectively connected with the embedded type hardware platform and the embedded type operation system by commands; the data acquisition unit has the advantages that the unit can be applied to the field such as industrial process monitoring, property management, on-line test and diagnosis and the like, the unit can meet reliable, stable and safe critical requirements of industrial process automation application to wireless communication technology, and the data acquisition unit has active significance of reducing the cost of the industrial monitoring system and improving product quality and production efficiency.
Description
Technical field
The present invention relates to a kind of data acquisition unit, is a kind of data acquisition unit based on the wireless HART network specifically.
Background technology
The industrial process automation data acquisition equipment needs the long-time magnanimity industrial process monitor data of constantly handling, existing industrial process automation data acquisition equipment connects and operation and of the remote past in wired mode mostly, popularize in a large number and industrial enterprise demands urgently reducing production costs so that improves today of product competitiveness at wireless network, wired data acquisition equipment connected mode has brought that the difficult maintenance of equipment, operation cost height, enforcement flexibility ratio are low, production informatization is demanded problems such as upgrading urgently.The popularization of going deep into and using along with wireless sensor network technology research, industry wireless network is with characteristics such as its low cost, easy care, high flexible, quick enforcements, cause national governments and scholar's great attention, become the new research focus in industrial automation field.Highway addressable remote transducer HART is a kind of open communication agreement that is used between field intelligent instrument and the pulpit equipment.
Wireless HART is a kind of special industrial process automation Application Design that is, the network communication protocol of wireless mesh topological structure, and it provides the wireless solution of a kind of low cost, low transmission rate.The wireless HART communication standard is to be based upon on the existing process international standard of on-the-spot test, and they comprise HART agreement (IEC 61158), EDDL (IEC61804-3), IEEE 802.15.4 radio and frequency hopping, spread spectrum and mesh network technology.
Owing to compatible tradition 4～20mA simulation system, provide plurality of advantages such as having low relatively bandwidth and communicating by letter of appropriateness response time, HART communication protocol is adopted by the field apparatus more than 2/3rds in the world at present, becomes the actual international standard in intelligent industrial control field.Development along with industry wireless network; wireless HART is on the basis of existing HART equipment of compatibility and application; having carried out function replenishes and application extension; can satisfy the crucial requirements such as reliable, stable and safety of process industry application to wireless communication technology; to reducing the cost of industry measurement and control system, very positive meaning improves product quality and production efficiency.
Summary of the invention
Goal of the invention: the objective of the invention is defective, a kind of data acquisition unit based on the wireless HART network is provided at existing wired industrial process automation field apparatus existence; It can run on the wireless HART network, obtains Device Diagnostic and procedural information and is transferred to main control equipment, realizes transmission site intelligent information, improves quality, security, availability, operation and reduces maintenance cost; It is mainly used in fields such as industrial process monitoring, administering of property, on-line testing and diagnosis.
Technical scheme: in order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of data acquisition unit based on the wireless HART network, comprise embedded hardware platform, the embedded OS that matches with the embedded hardware platform, complete wireless HART protocol stack, described complete wireless HART protocol stack is connected with embedded hardware platform, embedded OS respectively by order.
Described data acquisition unit hardware platform adopts CC2430F128 SOC (system on a chip) functional module.
Described embedded OS adopts the TinyOS embedded OS.
Described complete wireless HART protocol stack comprises Physical layer, data link layer, network layer and application layer, and described Physical layer, data link layer, network layer and application layer are arranged in order from the bottom up; Wherein,
Physical layer: the 2.4GHz band radio module that adopts the definition of IEEE Std 802.15.4-2006 protocol specification, employing offset quadrature phase shift keying technology and direct sequence spread spectrum skill, cleaning channel estimating and work such as channel frequency selection and data transmit-receive before finishing activation and stopping wireless receiver, current channel energy detection, reception packet link quality index, use CSMA/CA;
Data link layer: comprise the logical link control sublayer of wireless HART protocol normalized definition and MAC sublayer two parts of IEEE Std 802.15.4-2006 protocol specification definition, and provide interface for upper layer communication, support long and short two kind address, specific data link protocol data unit additional bit, specified data bag type adopts time synchronized mechanism and channel frequency modulation technology;
Network layer: complete wireless mesh network, source node and destination node network data protocol element are supported the multinode routing mechanism, network provides redundant path;
Application layer: reception order, execution, generation response concurrent are given the requestor; Described order comprises general orders, generic command and special command.
Beneficial effect: compared with prior art, advantage of the present invention is: have field apparatus, adjacent data collector and the main control equipment packet of forwarding, realize and functions such as robotization field apparatus, computing machine, network routing device are connected; Can satisfy the crucial requirements such as reliable, stable and safety of industrial process automation application to wireless communication technology, to reducing the cost of industry measurement and control system, very positive meaning improves product quality and production efficiency; By the wireless HART network that the present invention sets up, have characteristics such as self-organization, self-healing, reliable MESH network.The wireless HART protocol stack, based on easy-to-use, reliable, safe, with the principle of design of wireless mesh sensor protocol-compliant, the Physical layer and the MAC sublayer that comprise compatible IEEE Std802.15.4-2006 protocol specification, and logical link control sublayer, network layer and the application layer of following the wireless HART protocol standard, wherein MAC sublayer and logical link control sublayer belong to the data link layer by the wireless HART protocol normalized definition.This protocol stack runs on embedded OS and embedded hardware platform, satisfy the wireless sensor node internal memory little, low in energy consumption, the operation characteristics of high efficiency.
Description of drawings
Fig. 1 is the system assumption diagram of notebook data collector;
The wireless HART network diagram that Fig. 2 is constituted for the notebook data collector;
The complete wireless HART protocol stack synoptic diagram that Fig. 3 is moved for the notebook data collector;
Among Fig. 2: equipment. based on the data acquisition unit of wireless HART network, gateway. the wireless HART network belongs to component devices originally, host computer. the industrial process automation main control equipment.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1 to Figure 3, a kind of data acquisition unit of the present invention based on the wireless HART network, comprise embedded hardware platform, the embedded OS that matches with the embedded hardware platform, complete wireless HART protocol stack, described complete wireless HART protocol stack is connected with embedded hardware platform, embedded OS respectively by order.
Embedded hardware platform (being the data acquisition unit hardware platform) provides wireless HART protocol stack hardware environment, its SOC (system on a chip) functional module model is CC2430F128, it has integrated radio-frequency front-end, internal memory and microcontroller, 8051 microcontrollers of be integrated 1 high-performance and low-power consumption, the RF wireless set that meets the 2.4GHz of IEEE Std 802.15.4-2006 consensus standard, 14 analog-to-digital ADC, the AES security coprocessor, 2 USART that support several groups of agreements, 1 MAC timer that meets IEEE Std 802.15.4-2006 consensus standard, 16 bit timers of 1 routine and 28 bit timers.
Embedded OS (being the data acquisition unit software platform) provides wireless HART protocol stack software environment, adopt wireless sensor network generally to use and with the supporting OS Type TinyOS of employing embedded hardware platform, satisfy the little requirement of embedded hardware platform internal memory, make that the operation of wireless HART protocol stack is more efficient.
The complete wireless HART protocol stack of data acquisition unit runs on the software environment that hardware environment that the embedded hardware platform provided and embedded OS provide, it is the core component of data acquisition unit, compatible for wired HART agreement and wired HART order, comprise generic command, general orders and special command, realize functions such as the configuration of configuration in the wireless HART network of the encapsulation of industrial control automation field equipment data and order and parsing, wired HART field apparatus, wireless HART network and dynamic management.
Complete wireless HART protocol stack has been selected Physical layer wherein, data link layer, network layer and the application layer protocol stack design framework as oneself according to OSI seven layer network design of protocol principles.
Physical layer: the 2.4GHz band radio module that adopts the definition of IEEE Std 802.15.4-2006 protocol specification, employing offset quadrature phase shift keying technology and direct sequence spread spectrum skill, cleaning channel estimating and work such as channel frequency selection and data transmit-receive before finishing activation and stopping wireless receiver, current channel energy detection, reception packet link quality index, use CSMA/CA.Payload capacity 127 bytes.
Data link layer: comprise MAC sublayer two parts of the logical link control sublayer of wireless HART protocol normalized definition and IEEE Std 802.15.4-2006 protocol specification definition and provide interface for upper layer communication, support long and short two kind address, specific data link protocol data unit additional bit, specified data bag type, for TDMA time synchronized mechanism and frequency modulation technology are adopted in the interference that reduces other wireless system, support the multiple superframe of different time-gap, allow fast, at a slow speed, circulation and acyclic network flow are according to reaction time management and current control specified data link protocol data unit right of priority.Logical link control sublayer comprises HART frame format, HART device address structure, is used for the security service of message integrity and error-detecting.MAC sublayer is finished and is produced networked beacons frame, synchronizing network beacon frame, the connection of supporting individual access network and disconnection, support equipment security, ensures timeslice mechanism and the work such as reliable link that reciprocity MAC sublayer entity is provided for channel access provides CSMA/CA mechanism, processing and maintenance.
Network layer: complete wireless mesh network, source node and destination node network data protocol element are supported the multinode routing mechanism, the work of finishing comprises that network provides redundant path, can carry out Route Selection in the chart of downstream, upstream for more reliable and control time delay; For ad-hoc communication, confirm the path feasibility, carry out the information source Route Selection; Support broadcasting, multileaving and unicast transmission; Demand Driven Dynamic network bandwidth management causes the configuration/reconfigure to superframe and link; During configure field device, bandwidth is requested or discharges to satisfy the field device communicating demand; Primary bandwidth and elasticity bandwidth are provided, realize minimal energy consumption; Network data protocol element is cut apart automatically at source node, re-assemblies at destination node; Network performance continues monitoring, report and network arrangement, and the statistics of Maintenance Point and adjacent node and arrangement network are guaranteed channel backup, reduce energy consumption, the flattening network.
Application layer: compatible with wired HART order, based on standard data type and program, comprise a series of general orders, generic command and special command.Application layer applications is in order to solve different task, but the general work flow process is to receive order, carry out, produce response concurrent and give the requestor.Only generative process data message and intelligent distributing data when needed can be in real time or begin issue by signal triggering or self-defined time.But the sampling of real-time tracing process data is to alleviate the variable effect in reaction time.Can once transmit repeatedly reading order, so that upload configuration quickly.
Claims (4)
1. data acquisition unit based on the wireless HART network, it is characterized in that: comprise embedded hardware platform, the embedded OS that matches with the embedded hardware platform, complete wireless HART protocol stack, described complete wireless HART protocol stack is connected with embedded hardware platform, embedded OS respectively by order.
2. the data acquisition unit based on the wireless HART network according to claim 1 is characterized in that: described data acquisition unit hardware platform adopts CC2430F128 SOC (system on a chip) functional module.
3. the data acquisition unit based on the wireless HART network according to claim 1 is characterized in that: described embedded OS adopts the TinyOS embedded OS.
4. the data acquisition unit based on the wireless HART network according to claim 1, it is characterized in that: described complete wireless HART protocol stack comprises Physical layer, data link layer, network layer and application layer, and described Physical layer, data link layer, network layer and application layer are arranged in order from the bottom up; Wherein,
Physical layer: the 2.4GHz band radio module that adopts the definition of IEEE Std 802.15.4-2006 protocol specification, employing offset quadrature phase shift keying technology and direct sequence spread spectrum skill, cleaning channel estimating and work such as channel frequency selection and data transmit-receive before finishing activation and stopping wireless receiver, current channel energy detection, reception packet link quality index, use CSMA/CA;
Data link layer: comprise the logical link control sublayer of wireless HART protocol normalized definition and MAC sublayer two parts of IEEE Std 802.15.4-2006 protocol specification definition, and provide interface for upper layer communication, support long and short two kind address, specific data link protocol data unit additional bit, specified data bag type adopts time synchronized mechanism and channel frequency modulation technology;
Network layer: complete wireless mesh network, source node and destination node network data protocol element are supported the multinode routing mechanism, network provides redundant path;
Application layer: reception order, execution, generation response concurrent are given the requestor; Described order comprises general orders, generic command and special command.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223403A (en) * | 2011-06-03 | 2011-10-19 | 常州大学 | Intelligent instrument online-diagnosis and management system based on wireless HART (Highway Addressable Remote Transducer) protocol |
| CN103685178A (en) * | 2012-09-12 | 2014-03-26 | 中国科学院沈阳自动化研究所 | Industrial wireless network oriented online debugging method and system |
| CN108183944A (en) * | 2017-12-23 | 2018-06-19 | 西安交通大学 | A kind of design of wireless devices method based on ISA100.11a standards |
| CN111641815A (en) * | 2020-06-12 | 2020-09-08 | 天津达芸科技有限公司 | Real-time monitoring system based on HART protocol |
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| CN2833679Y (en) * | 2005-08-30 | 2006-11-01 | 上海师范大学 | HART interface holding blue tooth and USB dual interface |
| CN2833671Y (en) * | 2005-08-30 | 2006-11-01 | 上海师范大学 | HART bus collection device with GPRS transmission function |
| CN101188610A (en) * | 2007-12-11 | 2008-05-28 | 上海工业自动化仪表研究所 | Method for main device to realize HART field bus protocol based on hierarchical design |
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2010
- 2010-06-13 CN CN 201010200469 patent/CN101866540A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2833679Y (en) * | 2005-08-30 | 2006-11-01 | 上海师范大学 | HART interface holding blue tooth and USB dual interface |
| CN2833671Y (en) * | 2005-08-30 | 2006-11-01 | 上海师范大学 | HART bus collection device with GPRS transmission function |
| CN101188610A (en) * | 2007-12-11 | 2008-05-28 | 上海工业自动化仪表研究所 | Method for main device to realize HART field bus protocol based on hierarchical design |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223403A (en) * | 2011-06-03 | 2011-10-19 | 常州大学 | Intelligent instrument online-diagnosis and management system based on wireless HART (Highway Addressable Remote Transducer) protocol |
| CN103685178A (en) * | 2012-09-12 | 2014-03-26 | 中国科学院沈阳自动化研究所 | Industrial wireless network oriented online debugging method and system |
| CN103685178B (en) * | 2012-09-12 | 2016-08-17 | 中国科学院沈阳自动化研究所 | A kind of on-line debugging method and system towards industry wireless network |
| CN108183944A (en) * | 2017-12-23 | 2018-06-19 | 西安交通大学 | A kind of design of wireless devices method based on ISA100.11a standards |
| CN108183944B (en) * | 2017-12-23 | 2020-03-17 | 西安交通大学 | Wireless device design method based on ISA100.11a standard |
| CN111641815A (en) * | 2020-06-12 | 2020-09-08 | 天津达芸科技有限公司 | Real-time monitoring system based on HART protocol |
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Open date: 20101020 |