WO2000033276A1 - Transmitting/converting system for industrial measurements - Google Patents
Transmitting/converting system for industrial measurements Download PDFInfo
- Publication number
- WO2000033276A1 WO2000033276A1 PCT/FR1999/002998 FR9902998W WO0033276A1 WO 2000033276 A1 WO2000033276 A1 WO 2000033276A1 FR 9902998 W FR9902998 W FR 9902998W WO 0033276 A1 WO0033276 A1 WO 0033276A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- central unit
- transmitter
- modules
- input
- output
- Prior art date
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 21
- 230000005855 radiation Effects 0.000 claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 238000012546 transfer Methods 0.000 claims abstract description 5
- 230000006854 communication Effects 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 16
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 230000007175 bidirectional communication Effects 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000036039 immunity Effects 0.000 description 5
- 239000013307 optical fiber Substances 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/06—Non-electrical signal transmission systems, e.g. optical systems through light guides, e.g. optical fibres
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C2201/00—Transmission systems of control signals via wireless link
- G08C2201/50—Receiving or transmitting feedback, e.g. replies, status updates, acknowledgements, from the controlled devices
- G08C2201/51—Remote controlling of devices based on replies, status thereof
Definitions
- the present invention relates generally to industrial instrumentation, and it relates to a transmitter / converter system for industrial measurements.
- This invention applies, in particular but not exclusively, to the measurement of electrical quantities relating to single-phase or three-phase electrical networks (voltage, current, powers, energies, etc.), as well as to the measurement of signals from industrial sensors, and which can represent various quantities such as: temperature, pressure, flow rate, speed, etc.
- the system object of the invention ensures the acquisition of such measurements and their processing (electrical insulation, linearization, etc.), in order to render these measurements available for other systems, such as regulators, supervisors, PLCs, etc. or simply for a human operator, by displaying the measurements.
- the main role of this type of transmitter / converter system is thus to acquire and process the measurement signals, so that one or more other systems located downstream can exploit them. This is achieved through interfaces, which are generally: display means for an operator, analog outputs, relay outputs, pulse generation outputs, digital outputs on the field network, outputs on printer, outputs to a backup system, or any other output.
- interfaces which are generally: display means for an operator, analog outputs, relay outputs, pulse generation outputs, digital outputs on the field network, outputs on printer, outputs to a backup system, or any other output.
- the other current solutions which offer more modularity, are based on the principle of the combination of a central unit which performs the measurements, and independent external modules which exchange data with the central unit.
- the modules are connected to the central unit by wire connections, leading to electrical connectors, or by optical links of the optical fiber type.
- the first solution, of the electric type has the disadvantages: - a lack of immunity to electromagnetic disturbances radiated on the connecting cables;
- the second solution eliminates electromagnetic and electrostatic disturbances, as well as problems of galvanic isolation, and it also limits connection problems because the notion of polarity no longer intervenes.
- this solution has disadvantages of implementation and maintenance, for connections, because an optical fiber is not as easily cabled as an electric wire.
- the object of the invention is to conserve the advantages of the two types of existing solutions as much as possible, recalled above, while eliminating their drawbacks, by providing a transmitter / converter system which has excellent immunity to electromagnetic and electrostatic disturbances, as well excellent galvanic isolation, while having great ease of implementation and maintenance.
- the present invention essentially relates to a transmitter / converter system for industrial measurements, composed of a central measurement unit and of input and output modules, external to the central unit, which have connections with said central unit for communication therewith, in particular for data transfer, the system being characterized in that it comprises means of communication by optical radiation, without physical contact, between the central unit and at least some of the outdoor input and output modules.
- the means of communication between the central unit and at least some of the external input and output modules are constituted by infrared type links.
- connection proposed between the central unit and the external input and output modules, for the exchange of data between these constituent elements of the system remains of an optical nature but no longer includes physical support, since it s 'acts of a link by radiation, in particular by infrared radiation.
- a wireless connection naturally provides excellent immunity to electromagnetic and electrostatic disturbances, and it also provides excellent galvanic isolation between the various constituent elements of the system, namely the central unit and the input and output modules, since all physical contact between these elements is eliminated.
- the invention offers great ease of implementation, since there are no longer any connections or connections to be made, which eliminates the problems of connection errors encountered with wired connections, and also avoids mechanical handling precautions to be observed in the case of fiber optic systems.
- the design of the transmitter / converter system according to the invention does not create, when inserting or removing an input or output module, any disturbance for the communication between the central unit and the other modules.
- the central unit as well as the input and output modules called to communicate by optical radiation with this central unit, each comprise, on at least one face of their housing, an assembly composed of an optical transmitter and receiver, in particular an infrared transmitter and receiver, so as to allow bidirectional communication between the central unit and an outdoor module, or between two modules, the respective transmitters and receivers are arranged face to face.
- the central unit is equipped with two transmitter-receiver assemblies, placed respectively on two opposite faces of its housing, such as two opposite lateral faces, and at at least some of the input and output modules are likewise equipped with two transmitter-receiver assemblies placed respectively on two opposite faces of their housings, so as to allow bidirectional communication between the central unit and a plurality of modules d 'input and output aligned.
- the system can in particular take a configuration according to which the central unit is flanked, on its right and left sides, by a plurality of input and output modules, the infrared transceiver assemblies of which are located in correspondence, thus allowing each module not only to communicate with the central unit, but also (if it is a module located in an intermediate position) to transmit to a module according to the data it receives from the central unit , and conversely to bring back to the central unit the data originating from a neighboring module, the data thus passing through the modules, bidirectionally.
- the modules can be attached to each other, as well as to the central unit. These modules can also be separated from each other, as well as from the central unit, by a greater or lesser distance, up to a meter or more, the only mechanical constraint to be respected being the alignment of the elements (central unit and modules), which can be obtained, in practice, by mounting all these elements on the same generally horizontal rail, or other support, inside an electrical cabinet.
- At least one pair of modules is provided in a variant of the invention.
- return which each have, on one side, an assembly composed of an optical transmitter and receiver, the two return modules of the same pair being connected to each other by an electric cable preferably shielded, or by a fiber optic link.
- These return modules allow the provision of additional input and / or output modules, in an alignment different from the alignment formed by the central unit and by the previous input and output modules, for example on a rail. different, in the same cabinet or in another cabinet, thus allowing the extension of the system.
- the means of communication by optical radiation, between the central unit and the input and output modules are also used to achieve an optical coupling between one at least of these elements and an element of another nature, such as a programmable controller, associated with said system.
- the transmitter / converter system allows, thanks to its original mode of data transfer: - to have no mechanical constraints for the connection between the central unit and the various modules, in comparison with other solutions using plies of wires or optical fiber for connection, and requiring connectors; - offer insulation, and therefore security, guaranteed between the central unit, which can measure electric currents, for example three-phase high values, and the modules serving as an interface with the user or the processing of measurements;
- Figure 1 is an overall front view of a system according to the present invention
- Figure 2 is a block diagram of the central unit of the system of Figure 1;
- Figure 3 is a block diagram of an input or output module of this system;
- Figure 4 is a perspective view of such a module;
- Figure 5 is a front view of another system according to the invention, with return modules.
- the transmitter / converter system mainly comprises a central measurement unit 1, also more simply called “central unit”, and a plurality of modules external to the central unit 1, among which there are one or more input modules 2, and one or more output modules 3.
- the central unit 1 has the role of measuring, according to the applications, one or more physical quantities, of various nature
- the input module or modules 2 measure and transmit signals from sensors connected to these modules 2, and representative of the physical quantities to be measured.
- FIG. 1 which is a temperature measurement system
- the single input module 2 is connected to a temperature sensor 4.
- This input module 2 makes the temperature measurement available for the 'central unit 1, which can then retrieve and return said temperature measurement to the output modules 3.
- the output modules 3, two in number comprise on the one hand an analog output module 3, connected to a galvanometer 5 which allows a direct analog reading of the measured temperature, and on the other hand a digital output module 3, connected to a digital display 6 giving a direct digital reading of the same measured temperature.
- the central unit 1 has a box 7 of generally parallelepiped shape, on the two opposite lateral faces 8 and 9 (left and right faces) from which are provided, respectively, two assemblies each composed of an infrared transmitter 10 and a receiver infrared 11, as symbolized in the block diagram of FIG. 2.
- the central unit 1 manages the communication in the form of electrical signals, and it transmits or receives the data in the form of infrared signals, through its transmitters 10 which convert electrical signals into infrared radiation, and its 1 1 receptors which convert infrared radiation into electrical signals.
- the central unit 1 comprises an electronic communication management block 12, a microcontroller 13 and an electronic block 14 for input / output management, as well as an electric power supply unit 15.
- Each module 2 or 3 whether an input or output module, also has a box 17 of generally parallelepiped shape, on the two opposite lateral faces 18 and 19 (left faces and right) from which are still provided, respectively, two sets each composed of an infrared transmitter 20 and an infrared receiver 21, as symbolized in the block diagram of FIG. 3.
- the input 2 or output 3 module also has a blo c communication management electronics 22, a microcontroller 23 and an electronic block 24 for input-output management, as well as a power supply 25.
- Internal electrical connections 26 ensure the connection of each infrared receiver 21 with the transmitter infrared 20 of the other transmitter-receiver assembly, as well as the connection of the transmitters 20 and receivers 21 with the communication management block 22.
- the infrared radiation received by each receiver 21 is converted into an electrical signal, so that the microcontroller 23 can analyze and manage the information transmitted, this electrical signal also being transmitted to the transmitter 20 located on the opposite side, to be reconverted into infrared radiation and transmitted beyond, to another module 2 or 3 or to central unit 1.
- the infrared transmitter 20 and the infrared receiver 21 are placed close to each other, behind a common protective window 27 , transparent to infrared radiation.
- a common protective window 27 transparent to infrared radiation.
- two transmitter 10-receiver 11 assemblies of the central unit 1 are placed in similar positions on the left 8 and right 9 side faces of the housing 7 of this central unit 1.
- the central unit 1 and the outdoor modules 2 and 3 are arranged in alignment, for example on the same horizontal support rail (not shown), inside an electrical cabinet housing the system.
- the single input module 2 is here located to the left of the central unit 1, the window on the left side face 8 of the housing 7 of the central unit 1 being located opposite the corresponding window provided on the side face right 19 of the housing 17 of the input module 2.
- the central unit 1 and the input module 2 can thus exchange data, by infrared radiation and bidirectionally, as symbolized by the arrows 28 and 29.
- the two modules output 3 are arranged, one after the other, on the right side of the central unit 1, so that the left window of the first output module 3 is opposite the right window of the central unit 1, while the right window of the first output module 3 is located opposite the left window of the second output module 3.
- the central unit 1 exchanges data by infrared radiation, bidirectionally (see arrows 30 and 31), of a directly with the first output module 3, and indirectly (that is to say via the first output module 3) with the second output module 3.
- FIG. 5 shows a variant, arising from the embodiment described above, in which the system comprises a first horizontal alignment comprising a central unit 1, an input module 2 and an output module 3, supplemented by a second horizontal alignment, comprising two additional output modules 3 'and 3 ". This second alignment can be supported by another rail, located below the first alignment, inside the same cabinet.
- a pair of return modules 32 and 33 is provided.
- the first return module 32 equipped (on its side left) of a single transmitter-receiver assembly, is attached to the output module 3 adjacent to the central unit 1.
- the second return module 33 also equipped (but on its right side) with a single transmitter-receiver assembly, is attached to the output module 3 'of the lower alignment.
- the two return modules 32 and 33 are connected to each other by a shielded electric cable 34, or by an optical fiber.
- the first return module 32 transforms the data, conveyed by infrared radiation in the upper alignment (central unit 1 and modules 2 and 3), into electrical signals that the second module reference 33 converts back to infrared radiation, to communicate with the modules 3 'and 3 "of the lower alignment.
- these modules can have boxes of all shapes and dimensions;
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU15649/00A AU1564900A (en) | 1998-12-03 | 1999-12-02 | Transmitting/converting system for industrial measurements |
EP99958237A EP1135759A1 (en) | 1998-12-03 | 1999-12-02 | Transmitting/converting system for industrial measurements |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR98/15454 | 1998-12-03 | ||
FR9815454A FR2786906B1 (en) | 1998-12-03 | 1998-12-03 | TRANSMITTER / CONVERTER SYSTEM FOR INDUSTRIAL MEASUREMENTS |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000033276A1 true WO2000033276A1 (en) | 2000-06-08 |
Family
ID=9533697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/002998 WO2000033276A1 (en) | 1998-12-03 | 1999-12-02 | Transmitting/converting system for industrial measurements |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1135759A1 (en) |
AU (1) | AU1564900A (en) |
FR (1) | FR2786906B1 (en) |
WO (1) | WO2000033276A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2182180A (en) * | 1985-10-30 | 1987-05-07 | Otis Eng Co | Electronic control system with fiber optic link |
US5815074A (en) * | 1995-04-26 | 1998-09-29 | Alps Electric Co., Ltd. | Signal transmission apparatus |
-
1998
- 1998-12-03 FR FR9815454A patent/FR2786906B1/en not_active Expired - Fee Related
-
1999
- 1999-12-02 AU AU15649/00A patent/AU1564900A/en not_active Abandoned
- 1999-12-02 EP EP99958237A patent/EP1135759A1/en not_active Withdrawn
- 1999-12-02 WO PCT/FR1999/002998 patent/WO2000033276A1/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2182180A (en) * | 1985-10-30 | 1987-05-07 | Otis Eng Co | Electronic control system with fiber optic link |
US5815074A (en) * | 1995-04-26 | 1998-09-29 | Alps Electric Co., Ltd. | Signal transmission apparatus |
Also Published As
Publication number | Publication date |
---|---|
FR2786906A1 (en) | 2000-06-09 |
EP1135759A1 (en) | 2001-09-26 |
FR2786906B1 (en) | 2001-09-14 |
AU1564900A (en) | 2000-06-19 |
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