JP2009130519A5 - - Google Patents
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- JP2009130519A5 JP2009130519A5 JP2007301969A JP2007301969A JP2009130519A5 JP 2009130519 A5 JP2009130519 A5 JP 2009130519A5 JP 2007301969 A JP2007301969 A JP 2007301969A JP 2007301969 A JP2007301969 A JP 2007301969A JP 2009130519 A5 JP2009130519 A5 JP 2009130519A5
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- 238000005259 measurement Methods 0.000 claims 36
- 230000005540 biological transmission Effects 0.000 claims 12
- 230000002457 bidirectional Effects 0.000 claims 2
- 230000001702 transmitter Effects 0.000 claims 2
Claims (6)
上記タイムマスタ装置は、
通信時間を計測するための計測情報を送信するマスタ送信部と、
上記マスタ送信部が送信した計測情報が上記ネットワークを巡って再び戻ってくるまでのマスタ往復時間を計測するマスタ往復時間計測部とを備え、
上記複数のタイムスレーブ装置の各タイムスレーブ装置は、
上記計測情報を受信してから、上記計測情報を受信した装置へ送信するまでのスレーブ往復時間を計測するスレーブ往復時間計測部を備え、
上記分岐装置は、
上記計測情報を受信してから、上記支線ネットワークから上記計測情報を再び受信して送信するまでの支線往復時間を計測する支線往復時間計測部と、
上記計測情報を受信してから、上記本線ネットワークから上記計測情報を再び受信して送信するまでの本線往復時間を計測する本線往復時間計測部とを備え、
上記各タイムスレーブ装置は、さらに、
上記マスタ往復時間計測部が計測したマスタ往復時間と、上記スレーブ往復時間計測部が計測したスレーブ往復時間と、上記支線往復時間計測部が計測した支線往復時間と、上記本線往復時間計測部が計測した本線往復時間とに基づき遅延時間を算出する遅延時間算出部を備え、
上記タイムマスタ装置のマスタ送信部は、同期時刻の基準値となる同期情報を送信し、
上記各タイムスレーブ装置は、さらに、
上記同期情報を受信した時刻から上記遅延時間後の時刻を同期時刻として算出する同期時刻算出部
を備えることを特徴とする同期システム。 A network that branches off from one ring of a main network configured with a bidirectional transmission path and constitutes a virtual ring network including a branch network configured with a bidirectional transmission path, and transmits predetermined information. Provided at the branch positions of the time master device, a plurality of time slave devices that calculate synchronization time for synchronizing processing timing with other devices based on the information transmitted by the time master device, and the main line network and the branch line network A synchronization system in a network comprising a plurality of devices with a branching device,
The time master device is
A master transmitter for transmitting measurement information for measuring communication time;
A master round trip time measuring unit that measures a master round trip time until the measurement information transmitted by the master transmission unit returns again around the network;
Each time slave device of the plurality of time slave devices is
A slave round trip time measuring unit that measures the slave round trip time from the reception of the measurement information to the transmission of the measurement information to the device,
The branching device is
After receiving the measurement information, and the branch round trip time measuring unit for measuring the branch round trip time from the branch network before transmitting again receives the measurement information,
After receiving the measurement information, and a main line round-trip time measuring unit for measuring the main round trip time from the mains network before transmitting again receives the measurement information,
Each of the time slave devices is further
Master round trip time measured by the master round trip time measurement unit, slave round trip time measured by the slave round trip time measurement unit, branch round trip time measured by the branch round trip time measurement unit, and main line round trip time measurement unit A delay time calculation unit that calculates a delay time based on the main line round trip time,
The master transmission unit of the time master device transmits synchronization information serving as a reference value for synchronization time,
Each of the time slave devices is further
A synchronization system comprising a synchronization time calculation unit that calculates a time after the delay time from a time when the synchronization information is received as a synchronization time.
上記各タイムスレーブ装置は、さらに、
上記計測情報を受信した場合に、上記計測情報に含まれる補正時間を第１の補正時間として記憶するとともに、上記計測情報を再び受信した場合に、上記計測情報に含まれる補正時間を第２の補正時間として記憶するスレーブ記憶部を備え、
上記分岐装置は、さらに、
上記計測情報を受信した場合に、上記計測情報に含まれる補正時間を受信時補正時間として記憶するとともに、上記支線ネットワークを上記計測情報が巡って、上記計測情報を再び受信した場合に、上記計測情報に含まれる補正時間を支線補正時間として記憶する分岐装置記憶部と、
上記計測情報を支線ネットワークから再び受信した場合、上記分岐装置記憶部が記憶した受信時補正時間に上記支線ネットワーク往復時間を加えた時間を新たな補正時間として上記計測情報の補正時間を更新する補正時間更新部を備え、
上記タイムマスタ装置のマスタ送信部は、上記マスタ送信部が送信した計測情報が上記装置を巡って再び戻って場合に上記計測情報に含まれる補正時間と上記マスタ往復時間とを足して２で割った時間を、所定の時間を示す同期ポイントから減じた時間であるオフセット時間を含むオフセット情報を送信し、
上記各タイムスレーブ装置のスレーブ記憶部は、上記オフセット情報を受信した場合に、上記オフセット情報に含まれるオフセット時間をスレーブオフセット時間として記憶し、
上記分岐装置の分岐装置記憶部は、上記オフセット情報を受信した場合に、上記オフセット情報に含まれるオフセット時間を分岐装置オフセット時間として記憶し、
上記分岐装置は、さらに、
上記オフセット情報を支線ネットワークへ送信する場合に、上記本線ネットワーク往復時間から支線補正時間を減じて２で割った時間と、分岐装置オフセット時間とを足した時間を新たなオフセット時間として上記オフセット情報を更新するとともに、支線ネットワークから上記オフセット情報を再び受信した場合、上記分岐装置オフセット時間を新たなオフセット時間として上記オフセット情報を更新するオフセット時間更新部とを備え、
上記各タイムスレーブ装置の遅延時間算出部は、上記スレーブ記憶部が記憶した第２の補正時間から第１の補正時間を減じた時間と上記スレーブ往復時間とを足して２で割った時間と、上記スレーブ記憶部が記憶したスレーブオフセット時間とを足して遅延時間を算出する
ことを特徴とする請求項１記載の同期システム。 The master transmitter of the time master device transmits measurement information including the correction time,
Each of the time slave devices is further
When the measurement information is received, the correction time included in the measurement information is stored as the first correction time, and when the measurement information is received again, the correction time included in the measurement information is set to the second correction time. A slave storage unit that stores the correction time
The branching device further includes:
When the measurement information is received, the correction time included in the measurement information is stored as a correction time at the time of reception, and the measurement information travels around the branch network and the measurement information is received again. A branch device storage unit for storing the correction time included in the information as a branch line correction time;
When the measurement information is received again from the branch line network, the correction for updating the correction time of the measurement information is set as a new correction time by adding the round trip time of the branch network to the correction time at the time of reception stored in the branch device storage It has a time update unit,
The master transmission unit of the time master device adds the correction time included in the measurement information and the master round-trip time and divides by 2 when the measurement information transmitted by the master transmission unit returns again around the device. The offset information including the offset time, which is the time obtained by subtracting the predetermined time from the synchronization point indicating the predetermined time,
When the slave storage unit of each time slave device receives the offset information, the offset time included in the offset information is stored as a slave offset time,
The branch device storage unit of the branch device stores the offset time included in the offset information as the branch device offset time when the offset information is received,
The branching device further includes:
When transmitting the offset information to the branch network, the offset information is defined as a new offset time obtained by adding the time obtained by subtracting the branch line correction time from the main network round-trip time and dividing by 2 and the branch device offset time. An update time update unit that updates the offset information with the branch device offset time as a new offset time when the offset information is received again from the branch line network.
The delay time calculation unit of each of the time slave devices includes a time obtained by adding the time obtained by subtracting the first correction time from the second correction time stored in the slave storage unit and the slave round-trip time and dividing by two. The synchronization system according to claim 1, wherein the delay time is calculated by adding the slave offset time stored in the slave storage unit.
ことを特徴とする請求項２記載の同期システム。 3. The synchronization system according to claim 2, wherein the master transmission unit of the time master device transmits measurement information and offset information when the network is operating, and transmits only the synchronization information after the network is operating.
上記タイムマスタ装置は、さらに、
上記マスタ送信部が計測情報を上記第１の装置へ送信した場合に、上記計測情報を上記第２の装置から受信すると、上記計測情報を上記第２の装置へ送信するループバック部を備え、
上記マスタ往復時間計測部は、上記マスタ送信部が計測情報を上記第１の装置へ送信した場合に、上記計測情報を上記第１の装置から受信するまでの時間をマスタ往復時間として計測する
ことを特徴とする請求項１から３までのいずれかに記載の同期システム。 The time master device, against to the present-line network, provided on the double ring network, and more double on the ring network, and the branch device to be connected to the mains network, the first device and the Connected to two devices with two devices,
The time master device further includes:
When the master transmission unit transmits measurement information to the first device, the master transmission unit includes a loopback unit that transmits the measurement information to the second device when the measurement information is received from the second device.
The master round trip time measurement unit measures, as the master round trip time, a time until the measurement information is received from the first device when the master transmission unit transmits the measurement information to the first device. The synchronization system according to any one of claims 1 to 3, wherein:
上記各タイムスレーブ装置の遅延時間算出部は、上記第１の装置へ送信された計測情報と上記第１の装置へ送信されたオフセット情報とに基づき算出された情報から第１の遅延時間を算出するとともに、上記第２の装置へ送信された計測情報と上記第２の装置へ送信されたオフセット情報とに基づき算出された情報から第２の遅延時間を算出し、
上記各タイムスレーブ装置の同期時刻算出部は、上記第１の装置へ送信された同期情報を受信した時刻から上記第１の遅延時間後の時刻を第１の同期時刻として算出するとともに、上記第２の装置へ送信された同期情報を受信した時刻から上記第２の遅延時間後の時刻を第２の同期時刻として算出する
ことを特徴とする請求項４に記載の同期システム。 The master transmission unit of the time master device transmits measurement information, offset information, and synchronization information to both the first device and the second device,
The delay time calculation unit of each time slave device calculates a first delay time from information calculated based on the measurement information transmitted to the first device and the offset information transmitted to the first device. And calculating the second delay time from the information calculated based on the measurement information transmitted to the second device and the offset information transmitted to the second device,
The synchronization time calculation unit of each time slave device calculates the time after the first delay time from the time when the synchronization information transmitted to the first device is received as the first synchronization time, and 5. The synchronization system according to claim 4, wherein a time after the second delay time is calculated as a second synchronization time from a time at which the synchronization information transmitted to the second device is received.
上記所定のタイムスレーブ装置は、さらに、
同期情報を上記第３の装置と上記第４の装置とのいずれの装置から初めて受信したかを判定するポート判定部を備え、
上記各タイムスレーブ装置の同期時刻算出部は、上記同期情報を受信した時刻から、上記ポート判定部が上記同期情報を受信したと判定した装置から初めて受信した計測情報とオフセット情報とに基づき算出された遅延時間後の時刻を同期時刻として算出する
ことを特徴とする請求項５に記載の同期システム。 The predetermined time slave device of the plurality of time slave devices is provided in the main network of the double ring network, and is connected to two devices, a third device and a fourth device,
The predetermined time slave device further includes:
A port determination unit for determining whether the synchronization information is received for the first time from the third device or the fourth device;
The synchronization time calculation unit of each time slave device is calculated based on the measurement information and offset information received for the first time from the device that the port determination unit has determined to receive the synchronization information from the time when the synchronization information is received. 6. The synchronization system according to claim 5, wherein a time after the delay time is calculated as a synchronization time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007301969A JP5127416B2 (en) | 2007-11-21 | 2007-11-21 | Synchronization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007301969A JP5127416B2 (en) | 2007-11-21 | 2007-11-21 | Synchronization system |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2011261169A Division JP5127977B2 (en) | 2011-11-30 | 2011-11-30 | Synchronization system, time master device, time slave device, and synchronization method |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2009130519A JP2009130519A (en) | 2009-06-11 |
| JP2009130519A5 true JP2009130519A5 (en) | 2012-01-19 |
| JP5127416B2 JP5127416B2 (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2007301969A Expired - Fee Related JP5127416B2 (en) | 2007-11-21 | 2007-11-21 | Synchronization system |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5676191B2 (en) * | 2010-09-27 | 2015-02-25 | Ｎｅｃエンベデッドプロダクツ株式会社 | Module, module control device, module control system, time synchronization method and program |
| JP5456202B2 (en) * | 2011-02-25 | 2014-03-26 | 三菱電機株式会社 | Master device, slave device, and time synchronization method |
| JP5506890B2 (en) * | 2012-10-30 | 2014-05-28 | 三菱電機株式会社 | Synchronization system, time master device, time slave device, and synchronization method |
| CN105393500B (en) | 2013-07-19 | 2018-12-14 | 三菱电机株式会社 | Cyclic annular synchronous network system and time slave station |
| DE102014006231A1 (en) | 2014-04-30 | 2015-11-05 | Omron Corporation | Connecting multiple slave units to a master controller in a distributed controller system |
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| JPH01302939A (en) * | 1988-05-31 | 1989-12-06 | Toshiba Corp | Sampling time synchronization system |
| JPH0750895B2 (en) * | 1988-06-24 | 1995-05-31 | 日立電線株式会社 | Signal synchronization method |
| JPH06120960A (en) * | 1992-10-09 | 1994-04-28 | Toshiba Corp | Trunk station |
| US5428645A (en) * | 1992-11-03 | 1995-06-27 | International Business Machines Corporation | Anonymous time synchronization method |
| JPH0730569A (en) * | 1993-07-07 | 1995-01-31 | Toshiba Corp | Branch line lan station |
| JPH08214019A (en) * | 1995-02-06 | 1996-08-20 | Fuji Electric Co Ltd | Fault detection method for duplicate communication system |
| JPH09326817A (en) * | 1996-06-06 | 1997-12-16 | West Japan Railway Co | Data transmitter for vehicle control |
| JP2002237824A (en) * | 2001-02-09 | 2002-08-23 | Hitachi Ltd | Method for serving information |
| JP2004320657A (en) * | 2003-04-18 | 2004-11-11 | Nippon Telegr & Teleph Corp <Ntt> | Time synchronizing system, method for time synchronizing, master station, slave station and relay station |
| US20060203851A1 (en) * | 2005-03-14 | 2006-09-14 | Eidson John C | Applications of multiple time synchronization domains |
| JP4337835B2 (en) * | 2006-03-28 | 2009-09-30 | ヤマハ株式会社 | Audio network system with output delay correction function |
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2007
- 2007-11-21 JP JP2007301969A patent/JP5127416B2/en not_active Expired - Fee Related
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