CN201812149U - Primary-secondary clock system - Google Patents
Primary-secondary clock system Download PDFInfo
- Publication number
- CN201812149U CN201812149U CN 201020561271 CN201020561271U CN201812149U CN 201812149 U CN201812149 U CN 201812149U CN 201020561271 CN201020561271 CN 201020561271 CN 201020561271 U CN201020561271 U CN 201020561271U CN 201812149 U CN201812149 U CN 201812149U
- Authority
- CN
- China
- Prior art keywords
- clock
- unit
- clock unit
- calibrated
- standard time
- Prior art date
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a primary-secondary clock system which comprises a standard clock unit and a clock unit to be calibrated, wherein the standard clock unit is connected with the clock unit to be calibrated. The standard clock unit receives the standard time, and the clock synchronization is carried out on the clock unit to be calibrated by computing the time error between the standard clock unit and the clock unit to be calibrated. Especially, the primary-secondary clock system provided by the utility model also can comprise one or more relay routing units, and the standard clock unit realizes the clock synchronization on the clock unit to be calibrated by synchronizing the clock of each relay routing unit. The technical scheme realizes a primary-secondary clock system of short-range wireless data transmission, which has the advantages of low cost, automatic networking, and high communication efficiency, and is flexible in construction.
Description
Technical field
The utility model relates to a kind of princip al and subordinate clock system, specifically a kind of princip al and subordinate clock system that realizes the near radio transmission.
Background technology
Princip al and subordinate clock system is a kind of by the high precision master clock and by its control and the timekeeping system formed with its corresponding to some secondary clock of time.Mainly be to set up for the place of needs such as station, airport, stadiums, subway strict unified time.Generally speaking, the connecting line that all needs to be provided with power supply between master clock and the secondary clock and carry out the signal transmission, promptly existing princip al and subordinate clock system is based on all that cable network realizes, and this just exists defectives such as cost height, system constructing complexity.
ZigBee is the synonym of IEEE 802.15.4 agreement.Technology according to this agreement regulation is the wireless communication technology of a kind of short distance, low-power consumption.This title derives from the Eight characters dance of honeybee, since honeybee (bee) be by circle in the air and " drone " " dancing " of shaking wing to transmit pollen place azimuth information with the companion (zig), that is to say that the such mode of honeybee dependence has constituted the communication network in the colony.The ZigBee technology mainly is suitable for control and remote control field automatically, can embed various device, is a kind of near radio networking mechanics of communication of low-power consumption.
The utility model content
The utility model based on defectives such as cable network and cost height, system constructing complexity, provides a kind of princip al and subordinate clock system and clock synchronizing method thereof of near radio Network Transmission at above-mentioned princip al and subordinate clock system.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: princip al and subordinate clock system comprises standard time clock unit, clock unit to be calibrated, and described standard time clock unit links to each other with described clock unit to be calibrated.The standard time is accepted in described standard time clock unit, and by the time error of calculating between described standard time clock unit and described clock unit to be calibrated described clock unit to be calibrated is carried out clock synchronization.
Further, described princip al and subordinate clock system also comprises a transistroute unit, and described transistroute unit links to each other with described clock unit to be calibrated with described standard time clock unit respectively; The clock of described standard time clock unit by synchronous described transistroute unit realized the clock synchronization to described clock unit to be calibrated.
Further, described princip al and subordinate clock system also comprises at least two transistroute unit, after described at least two transistroute units in series are joined, links to each other with described clock unit to be calibrated with described standard time clock unit; The clock of described standard time clock unit by synchronous described transistroute unit realized the clock synchronization to described clock unit to be calibrated.
Described major clock unit comprises the first communication module that is used for data transmission, the memory module and the wireless receiving module of acceptance criteria time of holding time stamp data, and described memory module links to each other with described wireless receiving module, described first communication module respectively.
Described period of the day from 11 p.m. to 1 a.m clock unit comprises second communication module, the display module that shows temporal information that is used for data transmission, the driver module that drives described display module, and described driver module links to each other with described display module, described second communication module respectively.
Described transistroute unit mainly is made of the third communication module that is used for data transmission.
Especially, the first communication module of described data transmission, second communication module and third communication module are the ZigBee radio frequency chip.
The beneficial effects of the utility model are: the princip al and subordinate clock system that has realized a kind of low cost, automatic network-building, structure is flexible and communication efficiency is high near radio data transmission.
Description of drawings
Fig. 1 constitutes synoptic diagram for the utility model princip al and subordinate clock system;
Fig. 2 is the formation synoptic diagram of the standard time clock unit in the utility model princip al and subordinate clock system;
Fig. 3 is the formation synoptic diagram of the clock unit to be calibrated in the utility model princip al and subordinate clock system.
Embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used to explain the utility model, is not to be used to limit scope of the present utility model.
Princip al and subordinate clock system of the present utility model comprises standard time clock unit 100, clock unit to be calibrated 300, and standard time clock unit 100 links to each other with clock unit 300 to be calibrated.The standard time is accepted in standard time clock unit 100, and by the time error between basis of calculation clock unit 100 and the clock unit to be calibrated 300 clock unit 300 to be calibrated is carried out clock synchronization.
Further, princip al and subordinate clock system also comprises a transistroute unit 200, and transistroute unit 200 links to each other with clock unit 300 to be calibrated with standard time clock unit 100 respectively.Standard time clock unit 100 can pass through the clock synchronization of the clock realization of synchronized repeated routing unit 200 to clock unit 300 to be calibrated.
Perhaps, princip al and subordinate clock system also further comprises at least two transistroute unit 200, after at least two transistroute unit 200 are connected in series, links to each other with clock unit 300 to be calibrated with standard time clock unit 100 again.Standard time clock unit 100 passes through the clock synchronization of the clock realization of synchronized repeated routing unit 200 to clock unit 300 to be calibrated.
Referring to Fig. 1, in the utility model princip al and subordinate clock system, standard time clock unit 100 can directly communicate with clock unit 300 to be calibrated and finish clock synchronization, also can carry out clock synchronization by the 200 pairs of clock units 300 to be calibrated in one or more transistroutes unit.
As shown in Figure 3, standard time clock unit 100 in the utility model princip al and subordinate clock system comprises first communication module 101 formations that are used for data transmission, the memory module 102 and the wireless receiving module of acceptance criteria time 103 of holding time stamp data, and memory module 102 links to each other with wireless receiving module 103, first communication module 101 respectively.
As shown in Figure 4, clock unit 300 to be calibrated comprises second communication module 301 formations, the display module 302 that shows temporal information that is used for data transmission, the driver module 303 that drives display module.Transistroute unit 200 mainly is made of the communication module that is used for data transmission, and driver module 303 links to each other with display module 302, second communication module 301 respectively.
Transistroute unit 200 mainly is made of the third communication module that is used for data transmission.
Especially, above-mentioned first communication module, second communication module, third communication module can be the ZigBee radio frequency chip.As a kind of embodiment of the present utility model, standard time clock unit 100 can adopt the CC2420 chip of ChipCon company to realize data transmission, and transistroute unit 200 and clock unit to be calibrated 300 can adopt the CC2430 chip of ChipCon company to realize data transmission.
Particularly, below the clock synchronization specific implementation method of princip al and subordinate clock system of the present utility model is carried out brief description.
When standard time clock unit 100 directly carries out clock synchronization to clock unit 300 to be calibrated, promptly among Fig. 1
Part, the specific implementation method is as follows:
Steps A 1: the ZigBee radio frequency chip in the standard time clock unit 100 carries out scan channel, adopt other networks not have the idle channel that uses, select a PAN ID at random to monitor this channel, and stipulate the topological parameter of network simultaneously, as the son node number of maximum, the maximum number of plies, routing algorithm, routing table life cycle etc., set up communication network.300 channels with self of clock unit to be calibrated are set to the channel identical with standard time clock unit 100, add in the networking.
Steps A 2: the time error that preset standard clock unit 100 and clock unit to be calibrated are 300 is △.
Steps A 3: standard time clock unit 100 obtains the standard time by its inner wireless receiving module 103.And by judging whether that reaching predetermined synchronizing cycle starts clock synchronization, start synchronously if reach then, write down this timestamp t constantly
1, and to clock unit 300 transmission t to be calibrated
1Coding with △.
Steps A 4: clock unit 300 to be calibrated receives above-mentioned coding, and starting a time delay is t
△Accurate delay timer, and the coding that receives carried out data processing, for example carry out processing such as coding checkout, data decode.
Steps A 5: clock unit to be calibrated 300 confirms that coding is errorless, and default time delay t
△Timing is finished, and then adjusting self clock is (t
1+ △+t
△), start another time delay of t simultaneously
△'.
Steps A 6: preset t time delay
△After ' timing is finished, this timestamp t constantly of clock unit 300 records to be calibrated
3, and with t
3, t
△And t
△' coding be sent to standard time clock unit 100.
Steps A 7: standard time clock unit 100 receives above-mentioned coding, and writes down this timestamp t constantly
4Calculate △=(t
4-t
1-t
△-t
△')/2, at last the △ value is sent to clock unit 300 to be calibrated, adjust self clock by clock unit 300 to be calibrated according to the △ value, finish clock synchronization.In this step, standard time clock unit 100 can be directly sends △ values to clock unit 300 to be calibrated, and the while is in order to improve transfer efficiency, also can carry out the △ value being sent to next clock unit 300 to be calibrated during execution in step A3 synchronizing cycle again.
Standard time clock unit 100 utilizes said method promptly to realize clock synchronization to the clock unit to be calibrated 300 that directly is subjected to its control.Similarly, when the synchronized clocks system as Fig. 1 in
Perhaps
In the time of shown in the part, standard time clock unit 100 can at first carry out clock synchronization to relaying routing unit 200 by said method, and then by the transistroute unit 200 that has standard time information finish to clock unit 300 to be calibrated synchronously.
The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. a princip al and subordinate clock system is characterized in that, comprises standard time clock unit and clock unit to be calibrated, and described standard time clock unit links to each other with described clock unit to be calibrated;
The standard time is accepted in described standard time clock unit, by the time error of calculating between described standard time clock unit and the described clock unit to be calibrated described clock unit to be calibrated is carried out clock synchronization.
2. princip al and subordinate clock system according to claim 1 is characterized in that, also comprises a transistroute unit, and described transistroute unit links to each other with described clock unit to be calibrated with described standard time clock unit respectively;
The clock of described standard time clock unit by synchronous described transistroute unit realized the clock synchronization to described clock unit to be calibrated.
3. princip al and subordinate clock system according to claim 1 is characterized in that, also comprises at least two transistroute unit,
After described at least two transistroute units in series are joined, link to each other with described clock unit to be calibrated with described standard time clock unit;
The clock of described standard time clock unit by synchronous described transistroute unit realized the clock synchronization to described clock unit to be calibrated.
4. according to claim 1,2 or 3 described princip al and subordinate clock system, it is characterized in that,
Described major clock unit comprises the first communication module that is used for data transmission, the memory module and the wireless receiving module of acceptance criteria time of holding time stamp data, and described memory module links to each other with described wireless receiving module, described first communication module respectively;
Described period of the day from 11 p.m. to 1 a.m clock unit comprises second communication module, the display module that shows temporal information that is used for data transmission, the driver module that drives described display module, and described driver module links to each other with described display module, described second communication module respectively.
5. according to claim 2 or 3 described princip al and subordinate clock system, it is characterized in that described transistroute unit mainly is made of the third communication module that is used for data transmission.
6. princip al and subordinate clock system according to claim 4 is characterized in that, described first communication module and described second communication module are the ZigBee radio frequency chip.
7. princip al and subordinate clock system according to claim 5 is characterized in that, described third communication module is the ZigBee radio frequency chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020561271 CN201812149U (en) | 2010-10-14 | 2010-10-14 | Primary-secondary clock system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020561271 CN201812149U (en) | 2010-10-14 | 2010-10-14 | Primary-secondary clock system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201812149U true CN201812149U (en) | 2011-04-27 |
Family
ID=43895089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020561271 Expired - Fee Related CN201812149U (en) | 2010-10-14 | 2010-10-14 | Primary-secondary clock system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201812149U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101965045A (en) * | 2010-10-14 | 2011-02-02 | 烟台持久钟表集团有限公司 | Primary-secondary clock system and clock synchronization method |
| CN102323745A (en) * | 2011-08-28 | 2012-01-18 | 吴红委 | Wireless synchronization timing system |
| CN104765270A (en) * | 2014-08-05 | 2015-07-08 | 中磊电子（苏州）有限公司 | Time synchronization system and method |
| CN106385597A (en) * | 2016-10-08 | 2017-02-08 | 广东欧珀移动通信有限公司 | Clock adjusting method and device, terminal and multimedia synchronous playing system |
-
2010
- 2010-10-14 CN CN 201020561271 patent/CN201812149U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101965045A (en) * | 2010-10-14 | 2011-02-02 | 烟台持久钟表集团有限公司 | Primary-secondary clock system and clock synchronization method |
| CN101965045B (en) * | 2010-10-14 | 2013-08-07 | 烟台持久钟表集团有限公司 | Primary-secondary clock system and clock synchronization method |
| CN102323745A (en) * | 2011-08-28 | 2012-01-18 | 吴红委 | Wireless synchronization timing system |
| CN104765270A (en) * | 2014-08-05 | 2015-07-08 | 中磊电子（苏州）有限公司 | Time synchronization system and method |
| CN106385597A (en) * | 2016-10-08 | 2017-02-08 | 广东欧珀移动通信有限公司 | Clock adjusting method and device, terminal and multimedia synchronous playing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107465608B (en) | Internet of Things Multifunctional gateway based on NB-IoT | |
| CN102761941B (en) | A kind of method utilizing ultra-low power consumption wireless smart sensor's network protocol transmission | |
| CN107635283A (en) | A kind of indoor high-density mobile tag alignment system and localization method | |
| CN101442459B (en) | Networking scheme with high expansibility for wireless sensor network | |
| CN102843758B (en) | Method for data energy conservation transmission between nodes in wireless sensor network | |
| CN103096419A (en) | Management method and accessing point of terminal and terminal | |
| CN104378812B (en) | Farmland self-organizing network regenerative resource node difference topology control method | |
| CN201812149U (en) | Primary-secondary clock system | |
| CN103209473B (en) | A kind of power consumption wireless sensor network information gathering method | |
| CN103874172A (en) | Data transmission method and system in wireless body area network | |
| WO2010091128A3 (en) | Methods and systems for scheduling among nodes for a data slot in wireless communication networks | |
| CN101588272B (en) | Movable self-organization network test platform and method thereof | |
| CN106358276A (en) | Communication method based on ID packet | |
| CN105323832A (en) | Information interaction method, device and system of WBAN (wireless body area network) | |
| Kurtoglu et al. | Energy consumption in long-range linear wireless sensor networks using LoRaWan and ZigBee | |
| Chi et al. | Implementation and study of a greenhouse environment surveillance system based on wireless sensor network | |
| CN101282299B (en) | Method for measuring displacement speed of motion body in multi-hop network | |
| CN104993898A (en) | Method for monitoring-type time synchronization among cluster nodes in WIA-PA network | |
| CN105430736B (en) | A kind of self-organizing network method for synchronizing time and device | |
| CN101965045B (en) | Primary-secondary clock system and clock synchronization method | |
| CN103716293A (en) | Low voltage power line spread spectrum communication protocol employing time scale synchronization collision detection method | |
| CN103096441B (en) | Low power consumption communication method of low-bitrate wireless sensor network suitable for data collection | |
| CN102833828A (en) | Method for realizing low power consumption on radio frequency of wireless sensor network | |
| CN104320838B (en) | A kind of implementation method for the low-consumption wireless communications network system copied for family table collection | |
| KR20100112869A (en) | Method of processing communication in node composed wireless sensor network for low power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20131014 |