CN208621097U - Long-distance intelligent front end - Google Patents
Long-distance intelligent front end Download PDFInfo
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- CN208621097U CN208621097U CN201821233234.0U CN201821233234U CN208621097U CN 208621097 U CN208621097 U CN 208621097U CN 201821233234 U CN201821233234 U CN 201821233234U CN 208621097 U CN208621097 U CN 208621097U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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Abstract
The utility model provides a kind of long-distance intelligent front end, including several on-site terminals for collection site equipment working state information, present terminal includes ontology, display screen, input terminal, power supply terminal, communication terminal and signal terminal, power supply terminal is controlled to a power supply, communication terminal is connected with the A net of DCS system and B net respectively by two RS-485 communication buses, signal terminal connects sensor module, sensor module includes thermocouple sensor, thermal resistance sensor, current sensor, monitor the voltage sensor of industry spot DC voltage, monitor the electric resistance sensor of industry spot teletransmission resistance, RS-485 communication bus all has bus control unit, bus driver and bus media layer, measurement accuracy is high, strong antijamming capability, interface opening is good, intelligence degree is high, it uses Simple and flexible, installation expand convenient and ratio of performance to price height.
Description
Technical field
The utility model relates to a kind of long-distance intelligent front ends.
Background technique
The large scale equipments measuring point such as boiler is large number of at present, and measurement type is complicated, such as measures temperature, pressure, flow, electricity
The various types of signal such as stream, voltage, vibration, revolving speed ..., these signals need to be transferred to DCS system, generally use various prisons at present
Instrument operating alone is surveyed, switching value, 4-20mA analog quantity are transmitted to DCS system by hardwire, this communication modes need
Substantial amounts signal cable is laid, installation maintenance workload is huge.
Utility model content
The purpose of the utility model is to overcome the deficiencies of above-mentioned technology, to provide a kind of long-distance intelligent front end, measure
Precision height, strong antijamming capability, interface opening is good, intelligence degree is high, expands convenient and performance using simple and flexible, installation
Price is than high.
Technical solution used by the utility model is such that a kind of long-distance intelligent front end, including several for acquiring
The on-site terminal of field device operation status information, the present terminal includes ontology, the display screen that is arranged on the body,
What is be arranged on the body is used to input input terminal, power supply terminal, communication terminal and the signal terminal of external signal, institute
Power supply terminal is stated to be controlled to a power supply, the communication terminal by two RS-485 communication buses respectively with the A net of DCS system
And B net is connected, the signal terminal connects sensor module, and the sensor module includes monitoring industry spot thermocouple
Thermocouple sensor, monitor industry spot thermal resistance thermal resistance sensor, monitor industry spot DC current electric current pass
Sensor, the voltage sensor for monitoring industry spot DC voltage, the electric resistance sensor for monitoring industry spot teletransmission resistance, it is described
RS-485 communication bus all has bus control unit, bus driver and bus media layer.
It is further improved to be: the communications protocol that the communication terminal uses are as follows: MODBUS-RTU agreement.
Further improved to be: the body surface is welded using surface mount process.
Further improved to be: the input terminal takes 24 tunnel, three terminal differential mode analog quantity to input.
Further improved to be: the input signal types of the input terminal include the cold junction compensation mode of thermocouple, institute
Stating cold junction compensation mode includes automatic compensation, constant temperature compensation and other channel compensations.
By using preceding solution, the beneficial effects of the utility model are: fully considering that industrial field data acquires
Needs, using newest microelectric technique and the high performance remote intelligent front end of completely new surface mount process independent research and production
Product, the continuous precise measurement of the achievable various types of signal for being dispersed in industry spot.The series front end have measurement accuracy it is high,
Strong antijamming capability, interface opening is good, intelligence degree is high, expands the convenient and ratio of performance to price using simple and flexible, installation
High series of advantages.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the Principle of Communication figure of the utility model；
Fig. 3 is the signal processing circuit figure of the utility model；
Fig. 4 is the dual redundant circuit diagram of RS-485 communication bus.
Wherein: 1, on-site terminal；2, display screen；3, input terminal；4, power supply terminal；5, communication terminal；6, signal terminal.
Specific embodiment
The utility model is further illustrated below in conjunction with the drawings and specific embodiments.
As Figure 1-Figure 4, the utility model discloses a kind of long-distance intelligent front end, including several for collection site equipment
The on-site terminal 1 of work state information, the present terminal include ontology, the display screen being arranged on the body 2, are set to
Input terminal 3, power supply terminal 4, communication terminal 5 and the signal terminal 6 for being used to input external signal on the ontology, it is described
Power supply terminal 4 is controlled to a power supply, the communication terminal 5 by two RS-485 communication buses respectively with the A net of DCS system
And B net is connected, the signal terminal 6 connects sensor module, and the sensor module includes monitoring industry spot thermoelectricity
The thermal resistance sensor of even thermocouple sensor, monitoring industry spot thermal resistance, the electric current for monitoring industry spot DC current
Sensor, the voltage sensor for monitoring industry spot DC voltage, the electric resistance sensor for monitoring industry spot teletransmission resistance, it is described
RS-485 communication bus all has bus control unit, bus driver and bus media layer.
The communications protocol that the communication terminal 5 uses are as follows: MODBUS-RTU agreement, the standard of communication interface and communication
The opening of agreement can be adapted to various configuration softwares, easily realize and any network for supporting MODBUS-RTU agreement, system
The communication of (especially DCS) interconnects.
Communication interface uses the technology of " comprehensive redundancy ", and two buses of redundancy possess complete and independent bus
Controller, bus driver and bus media layer, two buses can run simultaneously, be independent of each other, and dual redundant electricity is disclosed in Fig. 4
Road then ensure that measurement accuracy height, strong antijamming capability.
Long-distance intelligent front end can be directly mounted near the signal measuring point of industry spot, accomplish real physical dispersion, can
A large amount of signal cable and compensating wire are saved, operating expenses is reduced, shortens the construction period.
Communication interface uses newest Magnetic isolation technology, largely eliminates uncertain current transfer ratio in optocoupler
Rate, non-linear transfer characteristic useful and drift and a series of problems, such as temperature drift at any time, with the incomparable advantage of optocoupler.
Long-distance intelligent front end uses Modular Structure Design, may make the establishment quite flexible of system size in this way, extends
It is convenient.
Long-distance intelligent front end using system on chip (SOC-System on Chip) design, using surface mount (
SMT) technique is welded, so that machine volume is small, low in energy consumption, integrated level is high.
The input terminal 3 takes 24 tunnel, three terminal differential mode analog quantity to input.
Input signal types: DC voltage, DC current, teletransmission resistance；
Thermocouple: K, S, R, T, E, J, B, N, EA-2；
Thermal resistance: Pt100, Cu50, Cu100, G53, BA1, BA2, BA3；
There are three types of cold junction compensation modes for thermocouple tool: automatic compensation, constant temperature compensation and other channel compensations；
Thermal resistance: three-wire system, two-wire system；Various types signal can be in same front end hybrid junction.
The basic principles and main features and its advantage of the utility model, the technology people of the industry has been shown and described above
Member only illustrates this described in above-described embodiment and explanation it should be appreciated that the present utility model is not limited to the above embodiments
The principle of utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model also has various change
And improvement, these various changes and improvements fall within the scope of the claimed invention, the utility model requires protection scope
It is defined by the appending claims and its equivalent thereof.
Claims (5)
1. long-distance intelligent front end, it is characterised in that: including several on-site terminals for collection site equipment working state information,
The present terminal includes ontology, is arranged on the body display screen, be arranged on the body for inputting outside
Input terminal, power supply terminal, communication terminal and the signal terminal of signal, the power supply terminal are controlled to a power supply, described logical
Letter terminal is connected with the A net of DCS system and B net respectively by two RS-485 communication buses, the signal terminal connection
Sensor module, the sensor module include the thermocouple sensor for monitoring industry spot thermocouple, monitoring industry spot heat
The thermal resistance sensor of resistance, the current sensor for monitoring industry spot DC current, the electricity for monitoring industry spot DC voltage
Pressure sensor, the electric resistance sensor for monitoring industry spot teletransmission resistance, the RS-485 communication bus all have bus marco
Device, bus driver and bus media layer.
2. long-distance intelligent front end according to claim 1, it is characterised in that: the communications protocol that the communication terminal uses
Are as follows: MODBUS-RTU agreement.
3. long-distance intelligent front end according to claim 1, it is characterised in that: the body surface uses surface mount process
Welding.
4. long-distance intelligent front end according to claim 1, it is characterised in that: the input terminal takes 24 tunnel, three terminal poor
Divide analog input.
5. long-distance intelligent front end according to claim 1, it is characterised in that: the input signal types packet of the input terminal
The cold junction compensation mode of thermocouple is included, the cold junction compensation mode includes automatic compensation, constant temperature compensation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821233234.0U CN208621097U (en) | 2018-12-25 | 2018-12-25 | Long-distance intelligent front end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821233234.0U CN208621097U (en) | 2018-12-25 | 2018-12-25 | Long-distance intelligent front end |
Publications (1)
| Publication Number | Publication Date |
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| CN208621097U true CN208621097U (en) | 2019-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821233234.0U Active CN208621097U (en) | 2018-12-25 | 2018-12-25 | Long-distance intelligent front end |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113810789A (en) * | 2021-08-10 | 2021-12-17 | 国网浙江省电力有限公司电力科学研究院 | Power equipment working condition multi-parameter distributed intelligent sensing node |
-
2018
- 2018-12-25 CN CN201821233234.0U patent/CN208621097U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113810789A (en) * | 2021-08-10 | 2021-12-17 | 国网浙江省电力有限公司电力科学研究院 | Power equipment working condition multi-parameter distributed intelligent sensing node |
| CN113810789B (en) * | 2021-08-10 | 2024-03-22 | 国网浙江省电力有限公司电力科学研究院 | Multi-parameter distributed intelligent sensing node for working condition of power equipment |
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