EP0840185A1 - Genaue Datierung eines Vorfalls erlaubendes Kommunikationsverfahren und Vorrichtung dazu - Google Patents

Genaue Datierung eines Vorfalls erlaubendes Kommunikationsverfahren und Vorrichtung dazu Download PDF

Info

Publication number: EP0840185A1
Authority: EP; European Patent Office
Prior art keywords: communication; frame; information; station; processing
Prior art date: 1996-11-05
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP97410116A

Other languages

English (en)

French (fr)

Other versions

EP0840185B1 (de

Inventor

Luc Weynachter

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Schneider Electric Industries SAS

Original Assignee

Schneider Electric SE

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1996-11-05

Filing date

1997-10-17

Publication date

1998-05-06

1997-10-17 Application filed by Schneider Electric SE filed Critical Schneider Electric SE

1998-05-06 Publication of EP0840185A1 publication Critical patent/EP0840185A1/de

2002-04-10 Application granted granted Critical

2002-04-10 Publication of EP0840185B1 publication Critical patent/EP0840185B1/de

2017-10-17 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Images

Classifications

- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G7/00—Synchronisation

Definitions

Known communication devices include a central and stations connected to the central by a communication network. Communication stations send to the central of information frames concerning, for example, the state of electrical devices associated with said stations.
the central unit processes the information frames in the order of arrival. But, for some applications, it is necessary to date the information received by the frames. In that case, a clock is connected to the central unit to provide the date and time.
the control unit then combines information representative of particular events received by the frames and time information provided by the clock.
the two types associated information is processed and then, for example, logged in memorization or display.
the event information is associated with time information when it is received by the central office.
this type of dating is not very precise. Indeed, quite a long time may elapse between the moment when an event occurs at a station and the moment when the information is dated in the central.
the object of the invention is a communication device and method allowing a precise dating of events.
the means for transmitting first means of communication of the power station provide, to the first means of determination, a signal representative of the transmission of a frame.
the first correction means provide the information processing means with information dated according to hourly information values provided by frames received by the means of reception of the first means of communication increased by first delay values provided by the first determination means.
the central unit includes storage means connected to the first means of determining delays.
the means for receiving the second means of communication of the station provide, to the second means of determination, a signal representative of reception of a frame.
the second correction means correct hourly information values, of frames provided by the reception means of the second communication means, depending on second delay values provided by the second determination means, values time information being increased by values representative of said second values delay.
the station includes processing means providing a frame comprising event information associated with schedule information, connected to the means of management of local time, event detection means and means transmission of the second means of communication.
the communication device of FIG. 1 comprises a central unit 1, a clock 2 connected to the central, an information processing device 3, a first and a second communication network 4 and 5 respectively, stations 6a, 6b and 6c connected to the first network 4 and stations 7a, 7b and 7c connected to the second network 5.
the control unit 1 communicates with the stations and receives representative information events detected by said stations.
the information is dated in the central then supplied to the processing device 3.
the device 3 allows, in particular, to memorize or record dated information.
Clock 2 provides the center with time information to date the events received by the central. This time information includes day and time information. They will be considered as the absolute time of the communication device.
said station When an event is detected by a station, said station sends a frame comprising information representative of the event.
the frame is received by the central processing unit the frames and date the information representative of events. Then the information dated are transmitted to the processing device 3.
This method of dating events is sufficient as long as the accuracy of the dating is not not critical. Indeed, a significant delay may elapse between the appearance of an event and the time of the dating of this event.
stations whose events must be precisely dated, include a management system of a local time.
This local time management device allows you to date an event as soon as it is detected by the station.
the station produces a frame comprising a information representative of the detected event and time information provided by the local time management system.
the frame, sent by the station is received and processed by the central. Then the information dated by the station is transferred to the device 3 of treatment.
the local time management system in the station avoids the problems of dating caused by the transmission time of the frame in the station and by the time frame reception and processing in the central.
the central unit clock and local time management devices must be synchronized. This synchronization is done by the transmission of frames containing synchronization time information. These frames are sent by the central to stations incorporating local time management devices.
the processing of frames in the central unit delays the sending of said frame to the stations. By therefore, the value of the frame time information is different from the absolute time of the clock when the frame is sent.
the problem of delay due to treatment is also present in the stations. Indeed, a time information frame received by a station is processed before being used by example to synchronize the local time management device. The treatment carried out in the station induces an additional delay which also affects the time information conveyed by the frame.
the processing times for sending and receiving hourly information frames from synchronization can also affect the accuracy of dating events if this dating must be very precise.
Figure 2 shows a diagram of a communication device, according to a mode of realization of the invention, allowing very precise dating of events.
the central unit 1 comprises a first circuit 8 for processing the transmission of frames and a first frame reception processing circuit 9 connected to a communication network 4, a first calculation module 10 connected to circuit 8 and to the clock 2, a storage circuit 11 connected to the calculation module 10, and a first correction module 12 connected to the calculation module 10 and to the circuit 9 for processing reception.
a station 6d also shown in FIG. 2, comprises a second circuit 13 of frame reception processing and a second frame transmission processing circuit 14 connected to network 4, a second calculation module 15 connected to second circuit 13, a second correction module 16 connected to circuit 13 and to calculation module 15, a local time management device 17 connected to the second correction module 16, and a event processing circuit 18 connected to the management device 17 and to the second transmission processing circuit 14.
the event processing circuit 18 of the station 6d is connected to an event detector 19d associated with the station 6d.
a second station 6e is connected to network 4 and a second detector 19th is associated with the second station 6th.
clock 2 sends, to transmission processing circuit 8 and to module 10 for calculation, a time transmission signal 20 comprising absolute time information CK1.
the processing circuit 8 processes the time information CK1 and sends a frame comprising this information.
the circuit 8 provides the module 10 with a signal 21 representative of the end of processing of the transmission of the frame comprising a hourly information.
the module 10 calculates a delay value EC1 representative of the delay between the instants of appearance of signals 20 and 21.
a signal 22 representative of the delay value EC1 is supplied to the storage circuit 11 to save the EC1 value.
the frame containing the time information sent by the central unit is received by the stations 6d and 6th.
the second circuit 13 for processing the frame reception provides the calculation module 15 with a signal 23 representative of the frame reception and a signal 24 comprising the time information CK1 after processing the reception of the frame.
the calculation module 15 calculates a delay value EC2 representative of the delay between the instants of appearance of signals 23 and 24.
a signal 25 representative of the delay value EC2 and signal 24 are supplied to the correction module 16.
the correction module 16 corrects the value of the hourly information CK1 supplied by the signal 24 to provide a signal 26 representative of a specific local time CKL1.
the correction consists in particular of adding the value EC2, representative of the delay of processing on reception of the frame, at the value of the hourly information received CK1. So, the value of local time is, at the time of correction, substantially equal to the sum values representative of the absolute time CK1 and of the duration of the delay EC2.
the signal 26 representative of the instantaneous value of the local time is supplied to the device 17 local time management.
the local time value is then synchronized in function of the absolute time value sent by the central unit and corrected by the module 16.
the device 17 includes a local clock which provides a local time CKL1 synchronized with the absolute time CK1 provided by the central. This local time can however be offset from the absolute time, by a value equal to the value of the EC1 central unit processing time.
the event detector 19d When the event detector 19d detects an EVST1 event, it provides a signal 27 representative of said event at the processing circuit 18.
the management device 17 provides at circuit 18 a signal representative of the local time at which the event occurs.
the processing circuit 18 provides a frame signal comprising information representative of the event and information representative of local time CKL1 at which the event occurred.
the transmission of the frame is then processed by the second circuit 14 for processing the transmission of frames which sends the frame on the network 4.
the frame sent by circuit 14 of the station is received by the central.
the first circuit 9 frame reception processing provides, to the first connection module 12, a signal 30 representative of event information and hourly hourly information local.
the correction module 12 corrects the value of the local time CKL1 of the frame in as a function of the EC1 value for delay in processing the central unit's transmission. This value delay is supplied to module 12 by calculation module 10 or by the storage 11.
the correction of the local time of the frame consists, in particular, in adding the value of the delay to the value representative of local time.
Information representative of the event and the corrected time at which the event is detected are supplied to the information processing device 3.
information schedule can have the following format: day, hour, minute, second, millisecond.
FIG. 3 shows a flowchart for sending a frame by a central unit 1.
a request to send a synchronization frame comprising a value CK1 absolute time is required.
the processing of the transmission of the frame is made.
the frame is sent and an end signal emission processing is provided.
a calculation of a delay EC1 is performed.
the value of the delay EC1 is stored.
a flowchart for receiving a frame by a station is shown in Figure 4.
the reception of a frame begins with a step 36 at an instant t3.
the treatment of reception of the frame comprising time information CK1 is carried out during a step 37.
the end of processing of the frame is detected.
a calculation of a delay EC2 is carried out.
a local time CKL1 is calculated, it corresponds approximately to the sum of the hourly information CK1 and EC2 delay.
the calculated value of the local time is loaded for synchronize the local time of the station with the absolute time of the central.
This method of receiving the station avoids the effects caused by the delay produced by the frame reception processing.
the correction is done directly in the single phase station.
FIG. 5 A flow diagram for sending a frame by a station is shown in Figure 5.
an EVST event is detected at a local time CKLST.
a processing is carried out to produce a frame comprising information concerning the event and hourly information representative of the local time at which the event occurred.
the frame is transmitted, during a step 44.
Frame reception by the control panel is represented by a flowchart in Figure 6.
a a step 45 the central unit processes the reception of a frame comprising information EVST event and CKLST local time information.
the control unit corrects the value of the hourly information for local time to date the event in absolute time.
the event is dated as if the time of appearance of the event was supplied directly by the clock associated with the central unit.
the central unit sends the information processing device a EVST event information dated in absolute time CKAEV.
This method of receiving the central unit overcomes the effects of the delay produced by the transmission of a frame by the central.
the correction is done in two phases.
a first phase consists in determining the delay in transmission and a second phase consists in correcting the time information of the frames received by the central unit as a function of the delay in transmission.
the accuracy of the dating events can be of the order of lms.
This communication device is particularly well suited to installation surveillance communication networks.
stations are associated with circuit breakers and where the detectors events are linked to trip units or auxiliary contacts.
a precise dating of events makes it easy to identify the place and time appearance of electrical faults.
the control unit 1 can communicate with the stations through several different networks.
a diagram of a communication network comprising a central unit communicating through two networks are shown in Figure 7.
the central unit 1 comprises two first processing circuits 8a and 8b of the transmission of frames connected respectively to networks 4 and 5, and two first frame reception processing circuits 9a and 9b also connected to the networks respectively 4 and 5.
a station 6f is connected to network 4 and a station 7d is connected to the network 5.
the clock 2 sends to circuits 8a, 8b and to module 10 CK1 time information in absolute time.
Each circuit 8a, 8b processes the transmission of a frame comprising time information CK1. Then, the circuits 8a and 8b supply the module 10 with signals respectively 21a and 21b when their respective frame is sent.
Module 10 calculates delays EC1 and EC2 due to the respective processing of the two circuits 8a and 8b, then stores them in the storage circuit 11.
circuit 9a When receiving frames from network 4, circuit 9a processes reception and sends a signal 30a comprising event information and time information local.
the correction module 12 corrects the time of the event in absolute time in function of the delay value EC1 determined during the synchronization phase. Then, the module 12 provides the device 3 with the information of the event dated in absolute time.
circuit 9b processes the reception of frames from network 5 and provides at module 12 a signal 30b comprising event and local time information.
the module 12 corrects the time of the event according to the EC2 delay previously determined then provides the device 3 with the information of the event dated in absolute time.
the clock 2 is represented next to the central unit, but it is obvious that this clock can be integrated into the central unit or remote far from the power plant.
the sending of synchronization frames can be triggered manually by a user or preferably automatically by the central.
the frequency of these frames can be, for example, predetermined and regular.
circuits and modules described above in the communication device can be separate or preferably integrated in the same microcontroller or microprocessor. Of even, functions of said circuits and modules can be realized in a form programmed operating with a microprocessor.

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Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Synchronisation In Digital Transmission Systems (AREA)
Data Exchanges In Wide-Area Networks (AREA)
Electric Clocks (AREA)
Computer And Data Communications (AREA)

EP19970410116 1996-11-05 1997-10-17 Genaue Datierung eines Vorfalls erlaubendes Kommunikationsverfahren und Vorrichtung dazu Expired - Lifetime EP0840185B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR9613701A FR2755557B1 (fr)	1996-11-05	1996-11-05	Dispositif et procede de communication permettant une datation precise d'evenements
FR9613701		1996-11-05

Publications (2)

Publication Number	Publication Date
EP0840185A1 true EP0840185A1 (de)	1998-05-06
EP0840185B1 EP0840185B1 (de)	2002-04-10

Family

ID=9497489

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19970410116 Expired - Lifetime EP0840185B1 (de)	1996-11-05	1997-10-17	Genaue Datierung eines Vorfalls erlaubendes Kommunikationsverfahren und Vorrichtung dazu

Country Status (3)

Country	Link
EP (1)	EP0840185B1 (de)
DE (1)	DE69711806T2 (de)
FR (1)	FR2755557B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE10113260B4 (de) *	2001-03-16	2005-10-20	Siemens Ag	Synchrones, getaktetes Kommunikationssystem mit Relativuhr und Verfahren zum Aufbau eines solchen Systems
WO2015020847A3 (en) *	2013-08-07	2015-09-24	General Electric Company	Time protocol based timing system for time-of-flight instruments

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102009052081B4 (de) *	2009-11-05	2021-01-21	Rohde & Schwarz GmbH & Co. Kommanditgesellschaft	Verfahren zur Ermittlung von zumindest einer komponentenspezifischen Zeit aus einer Referenz-Zeit in einer Komponente eines Testsystems und entsprechende Kommunikationseinrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2128227A1 (de) *	1971-03-12	1972-10-20	Onera (Off Nat Aerospatiale)
FR2143521A1 (de) *	1971-06-08	1973-02-09	Onera (Off Nat Aerospatiale)
US4337463A (en) *	1980-08-22	1982-06-29	Control Data Corporation	Time synchronization master station and remote station system
EP0325219A2 (de) *	1988-01-19	1989-07-26	A.C. Nielsen Company	Datensammlung und Übertragungssystem mit Echtzeittakt

1996
- 1996-11-05 FR FR9613701A patent/FR2755557B1/fr not_active Expired - Fee Related
1997
- 1997-10-17 DE DE1997611806 patent/DE69711806T2/de not_active Expired - Lifetime
- 1997-10-17 EP EP19970410116 patent/EP0840185B1/de not_active Expired - Lifetime

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2128227A1 (de) *	1971-03-12	1972-10-20	Onera (Off Nat Aerospatiale)
FR2143521A1 (de) *	1971-06-08	1973-02-09	Onera (Off Nat Aerospatiale)
US4337463A (en) *	1980-08-22	1982-06-29	Control Data Corporation	Time synchronization master station and remote station system
EP0325219A2 (de) *	1988-01-19	1989-07-26	A.C. Nielsen Company	Datensammlung und Übertragungssystem mit Echtzeittakt

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE10113260B4 (de) *	2001-03-16	2005-10-20	Siemens Ag	Synchrones, getaktetes Kommunikationssystem mit Relativuhr und Verfahren zum Aufbau eines solchen Systems
US7012980B2 (en)	2001-03-16	2006-03-14	Siemens Aktiengesellschaft	Synchronous, clocked communication system with relative clock and method for configuring such a system
WO2015020847A3 (en) *	2013-08-07	2015-09-24	General Electric Company	Time protocol based timing system for time-of-flight instruments
CN105431787A (zh) *	2013-08-07	2016-03-23	通用电气公司	飞行时间仪器的基于时间协议的计时系统
US9541947B2 (en)	2013-08-07	2017-01-10	General Electric Company	Time protocol based timing system for time-of-flight instruments
CN105431787B (zh) *	2013-08-07	2018-11-02	通用电气公司	飞行时间仪器的基于时间协议的计时系统

Also Published As

Publication number	Publication date
EP0840185B1 (de)	2002-04-10
FR2755557A1 (fr)	1998-05-07
FR2755557B1 (fr)	1998-12-31
DE69711806T2 (de)	2002-09-26
DE69711806D1 (de)	2002-05-16

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