CN108765624A - A kind of swimming timekeeping system of same clock source - Google Patents
A kind of swimming timekeeping system of same clock source Download PDFInfo
- Publication number
- CN108765624A CN108765624A CN201810820393.9A CN201810820393A CN108765624A CN 108765624 A CN108765624 A CN 108765624A CN 201810820393 A CN201810820393 A CN 201810820393A CN 108765624 A CN108765624 A CN 108765624A
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- China
- Prior art keywords
- transceiver
- crystal oscillator
- swimming lane
- swimming
- clock source
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- 230000009182 swimming Effects 0.000 title claims abstract description 56
- 239000013078 crystal Substances 0.000 claims abstract description 43
- 238000004891 communication Methods 0.000 claims abstract description 20
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
- G07C1/22—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people in connection with sports or games
- G07C1/24—Race time-recorders
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
Abstract
A kind of swimming timekeeping system of same clock source, including communication controller, swimming lane controller and communication bus, it is characterized in that the communication controller includes constant-temperature crystal oscillator and CAN transceiver I, the swimming lane controller includes timing chip clock source and CAN transceiver II, the CAN transceiver I is electrically connected with constant-temperature crystal oscillator, the CAN transceiver II is electrically connected with timing chip clock source, and CAN transceiver I is connected by communication bus with CAN transceiver II；Swimming lane controller shares a crystal oscillator, eliminates the timing relative error between swimming lane controller, improves the precision of timing, also reduces cost, of simple structure and strong practicability.
Description
Technical field
The present invention relates to swimming timing field more particularly to a kind of swimming timekeeping systems of same clock source.
Background technology
Timing is carried out using individual timing crystal oscillator on each swimming lane of existing swimming timekeeping system, individual crystal oscillator is logical
Cross individual clock source crystal oscillator frequency timing.Each swimming lane can be caused to occur using independent crystal oscillator because of temperature or other factors
Frequency error, existing existing swimming lane controller cannot accomplish that the crystal oscillator frequency in each swimming lane is absolutely consistent, so as to cause than
It may lead between swimming lane that there are timing errors during match because of crystal oscillator consistency difference, timing time is inaccurate to ask to generate
Topic.
Swimming timekeeping system needs to record the fixture of sportsman respectively on 10 swimming lanes, every individually to be counted all the way
When before product carry out timing using independent crystal oscillator, independent crystal oscillator timing has that there are the timing errors between swimming lane, such as two
A swimming lane starts simultaneously at while terminating canto, if since some independent crystal oscillator of crystal oscillator is influenced by environment to lead to crystal oscillator
Frequency generates variation, and timing can be caused to generate error.
Invention content
To solve the above-mentioned problems, the present invention provides a kind of swimming timekeeping system of same clock source, a kind of meter is provided
Shi Gengjia accurately swims timekeeping system.To achieve the above object, the technical solution that the present invention takes is：A kind of same clock source
Swimming timekeeping system, including communication controller, swimming lane controller and communication bus, the communication controller includes constant temperature crystalline substance
It shakes and CAN transceiver I, the swimming lane controller includes timing chip clock source and CAN transceiver II, CAN transmitting-receivings
Device I is electrically connected with constant-temperature crystal oscillator, and the CAN transceiver II is electrically connected with timing chip clock source, and CAN transceiver I passes through logical
News bus is connected with CAN transceiver II.
Further, the signal frequency that constant-temperature crystal oscillator generates is set as 32.768KHz.The swimming lane controller volume limit because before
Making can not can only be on communication controller using temperature compensating crystal oscillator, the present invention using constant-temperature crystal oscillator having in swimming lane controller
With more high-end constant-temperature crystal oscillator or atom crystal oscillator, the precision of timing is improved.
Compared with prior art, the invention has the advantages that：Swimming lane controller shares a crystal oscillator, eliminates swimming
Timing relative error between track control unit, improves the precision of timing, also reduces cost, of simple structure and strong practicability.
Description of the drawings
The present invention is described in further detail below in conjunction with attached drawing.
Attached drawing 1 is the structural schematic diagram of the present invention；
Attached drawing 2 is the structural schematic diagram of transceiver circuit；
In attached drawing：1, communication controller, 11, constant-temperature crystal oscillator, 12, CAN transceiver I, 2, swimming lane controller, 21, timing chip when
Zhong Yuan, 22, CAN transceiver II.
Specific implementation mode
In order to make those skilled in the art more fully understand technical scheme of the present invention, below in conjunction with the accompanying drawings 1, attached drawing 2 and
The present invention is further illustrated for specific embodiment.
As shown in Fig. 1, a kind of swimming timekeeping system of same clock source, including communication controller 1, swimming lane controller 2
And communication bus, the communication controller 1 include constant-temperature crystal oscillator 11 and CAN transceiver I 12, the swimming lane controller 2 packet
Timing chip clock source 21 and CAN transceiver II 22 are included, the CAN transceiver I 12 is electrically connected with constant-temperature crystal oscillator 11, described
CAN transceiver II 22 is electrically connected with timing chip clock source 21, and CAN transceiver I 11 passes through communication bus and CAN transceiver II 22
It is connected.
Further, the signal frequency that constant-temperature crystal oscillator 11 generates is set as 32.768KHz.The swimming lane controller volume because before
Limitation can not can only use temperature compensating crystal oscillator having in swimming lane controller using constant-temperature crystal oscillator, and the present invention can be on communication controller
It is to use more high-end constant-temperature crystal oscillator or atom crystal oscillator, improves the precision of timing.
Preferably, CAN transceiver will have the output of source crystal oscillator as shown in Fig. 2 using the CTM1051KAT models of ZLG
Pin is connected to the RXD pins of CTM1051KAT, on output H and the L pin of bus twisted pair line connection CTM1051KAT, crystal oscillator production
Raw pulse converts the signal to differential signal on bus twisted-pair feeder by CTM1051KAT and transmits, swimming lane controller
Differential signal is switched to single sided pulse signal and generates pulse on TXD pins by H the and L pins of CTM1051KAT, accesses swimming lane
Timing is carried out in the timing chip of controller.
Technical scheme of the present invention and traditional swimming timekeeping system experiment test are compared, are after one hour, often below
One swimming lane uses the test result of independent crystal oscillator and the same crystal oscillator：
| Independent crystal oscillator（μs） | Same crystal oscillator（μs） | |
| Swimming lane 1 | 3,600,000,003 | 3,600,000,000 |
| Swimming lane 2 | 3,600,000,002 | 3,600,000,000 |
| Swimming lane 3 | 3,600,000,007 | 3,600,000,000 |
| Swimming lane 4 | 3,600,000,003 | 3,600,000,000 |
| Swimming lane 5 | 3,600,000,006 | 3,600,000,000 |
| Swimming lane 6 | 3,599,999,999 | 3,600,000,000 |
| Swimming lane 7 | 3,600,000,010 | 3,600,000,000 |
| Swimming lane 8 | 3,600,000,012 | 3,600,000,000 |
| Swimming lane 9 | 3,599,999,988 | 3,600,000,000 |
| Swimming lane 10 | 3,600,000,008 | 3,600,000,000 |
By test result it is found that each swimming lane is more accurate using same crystal oscillator timing, eliminates each swimming lane and use individually
The defect of crystal oscillator.
The operation principle and the course of work of the present invention is as follows：The square-wave pulse for the 32.768KHZ that constant-temperature crystal oscillator 11 exports is defeated
Enter the ends RX to CAN transceiver I 12, square-wave signal is switched to differential signal, is sent to by communication bus by CAN transceiver I 12
Differential signal is switched to square-wave pulse signal by CAN transceiver II 22, CAN transceiver II 22, from the ports TX of CAN transceiver II 22
It is output in timing chip clock source 21, becomes the clock source in timing chip clock source 21；CAN transceiver I 12 and CAN transceiver
II 22 on a communication bus, and CAN transceiver I 12 and CAN transceiver II 22 play signal amplification and enhancing signal is anti-dry
The effect of disturbing improves signal transmission distance；The timing chip clock source 21 of each swimming lane controller 2 is all from constant-temperature crystal oscillator 11,
Timing is more accurate.
Compared with prior art, the invention has the advantages that：Swimming lane controller shares a crystal oscillator, eliminates swimming
Timing relative error between track control unit, improves the precision of timing, also reduces cost, of simple structure and strong practicability.
Using technical solutions according to the invention or those skilled in the art under the inspiration of technical solution of the present invention,
Similar technical solution is designed, and reaches above-mentioned technique effect, is to fall into protection scope of the present invention.
Claims (2)
1. a kind of swimming timekeeping system of same clock source, including communication controller（1）, swimming lane controller（2）And communication bus,
It is characterized in that the communication controller（1）Including constant-temperature crystal oscillator（11）With CAN transceiver I（12）, the swimming lane controller
（2）Including timing chip clock source（21）With CAN transceiver II（22）, the CAN transceiver I（12）With constant-temperature crystal oscillator（11）
Electrical connection, the CAN transceiver II（22）With timing chip clock source（21）Electrical connection, CAN transceiver I（11）Pass through communication
Bus and CAN transceiver II（22）It is connected.
2. swimming timekeeping system according to claim 1, it is characterized in that constant-temperature crystal oscillator（11）The signal frequency of generation is arranged
For 32.768KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810820393.9A CN108765624A (en) | 2018-07-24 | 2018-07-24 | A kind of swimming timekeeping system of same clock source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810820393.9A CN108765624A (en) | 2018-07-24 | 2018-07-24 | A kind of swimming timekeeping system of same clock source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108765624A true CN108765624A (en) | 2018-11-06 |
Family
ID=63970932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810820393.9A Pending CN108765624A (en) | 2018-07-24 | 2018-07-24 | A kind of swimming timekeeping system of same clock source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108765624A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202067316U (en) * | 2011-05-30 | 2011-12-07 | 漳州市吉德龙电子有限公司 | Swimming pool time clock |
| CN202563571U (en) * | 2012-05-29 | 2012-11-28 | 济宁数智体育设备有限公司 | Swimming timing device based on digital communications |
| CN202563674U (en) * | 2012-05-29 | 2012-11-28 | 济宁数智体育设备有限公司 | Timing device based on wireless communication |
| CN106131947A (en) * | 2016-09-14 | 2016-11-16 | 潘进 | A kind of method that between Wireless Communication Equipment, clock synchronizes |
| CN208400185U (en) * | 2018-07-24 | 2019-01-18 | 山东中泳体育股份有限公司 | A kind of swimming timekeeping system of same clock source |
-
2018
- 2018-07-24 CN CN201810820393.9A patent/CN108765624A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202067316U (en) * | 2011-05-30 | 2011-12-07 | 漳州市吉德龙电子有限公司 | Swimming pool time clock |
| CN202563571U (en) * | 2012-05-29 | 2012-11-28 | 济宁数智体育设备有限公司 | Swimming timing device based on digital communications |
| CN202563674U (en) * | 2012-05-29 | 2012-11-28 | 济宁数智体育设备有限公司 | Timing device based on wireless communication |
| CN106131947A (en) * | 2016-09-14 | 2016-11-16 | 潘进 | A kind of method that between Wireless Communication Equipment, clock synchronizes |
| CN208400185U (en) * | 2018-07-24 | 2019-01-18 | 山东中泳体育股份有限公司 | A kind of swimming timekeeping system of same clock source |
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Application publication date: 20181106 |