CN105068416A - Single-point fixed electronic police system automatic time correcting method - Google Patents
Single-point fixed electronic police system automatic time correcting method Download PDFInfo
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- CN105068416A CN105068416A CN201510367698.5A CN201510367698A CN105068416A CN 105068416 A CN105068416 A CN 105068416A CN 201510367698 A CN201510367698 A CN 201510367698A CN 105068416 A CN105068416 A CN 105068416A
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- time
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- electronic police
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Abstract
The present invention discloses a single-point fixed electronic police system automatic time correcting method. An electronic police system comprises a machine case and a control host arranged inside the machine case. The method is characterized in that a GPS external antenna is attached to a machine box or a stand post of the single-point fixed electronic police system and is connected with GPS time synchronization equipment through a signal line, the GPS time synchronization equipment is connected with the control host through a standard USB interface, and the control host reads universal time coordinated (UTC) date and time data provided by the GPS time synchronization equipment and adjusts system time of the control host, and time calibration is carried out by candid video cameras according to the system time of the control host. The method is advantageous in that system time calibration of the single-point fixed electronic police system is realized, and dispute, caused by large clock deviation, in law enforcement bases and law enforcement processes are avoided.
Description
Technical field
The present invention relates to electronic police system field, be specifically related to a kind of single-point and fix electronic police system automatic correcting time method.
Background technology
At present, the fixing electronic police system front-end equipment clock information of built single-point (not carrying out center cluster) adopts on-the-spot manual maintenance to be main, and during system school, cost is higher, the cycle is longer.Owing to safeguarding not in time, very easily cause clock jitter comparatively large, dispute can not be produced as in enforce foundation or enforcing law, also in the waste to a certain degree causing governmental investment.
Summary of the invention
The object of the present invention is to provide a kind of single-point to fix electronic police system automatic correcting time method, utilize GPS time service equipment to fix electronic police system to single-point and carry out automatic correcting time.
To achieve these goals, technical scheme of the present invention is: a kind of single-point fixes electronic police system automatic correcting time method, described electronic police system comprises cabinet and is arranged on the main control system in cabinet, it is characterized in that GPS external antenna being attached to cabinet or the vertical rod that single-point fixes electronic police system, GPS external antenna is linked by signal wire and GPS time service equipment, GPS time service equipment is connected with main control system by standard USB port, main control system reads the UTC date that GPS time service equipment provides, time data, adjustment main control system system time, candid camera carries out time calibration with main control system system time.
GPS time service equipment is applied to single-point and fixes electronic police system by the present invention, the UTC(Coordinated Universal Time(UTC) UniversalTimeCoordinated utilizing GPS time service equipment to provide) date, time data fix electronic police system to single-point and carry out automatic correcting time.The invention has the advantages that adopting GPS time service equipment to fix electronic police system for single-point provides reference clock information, realizes the automatic calibration of front-end control main frame, candid camera system time, guarantees the accurate of illegal vehicle forensic information, avoid law enforcement dispute.
Accompanying drawing explanation
Fig. 1 is GPS time service equipment scheme of installation of the present invention.
Embodiment
The invention provides a kind of single-point and fix electronic police system automatic correcting time method, described electronic police system comprises cabinet and is arranged on the main control system 1 in cabinet, it is characterized in that GPS external antenna 2 being attached to cabinet or the vertical rod that single-point fixes electronic police system, and be connected with GPS time service equipment 3 by signal wire 5, GPS time service equipment 3 standard USB port is connected with main control system 1 by data line 4, main control system reads the UTC date that GPS time service equipment provides, time data, adjustment main control system system time, candid camera carries out time calibration with main control system system time.
The present invention is based on front-end control main frame OS operating system, the UTC date provided by serial communication protocol, standard data interface reading GPS time service equipment, time data, main control system system time is adjusted with this, candid camera carries out time calibration with main control system system time, and then the single-point realized under reference clock prerequisite fixes the time unification of electronic police system front-end equipment.
When the long-time loss situation of chance gps signal, then cannot obtain current base clock information from GPS time service equipment, the average (being accurate to millisecond) of desirable historical calibration deviation, as the adjusted value of present system time, computing formula is: T=T(t)+[δ (t-n)+δ (t-n-1)+... + δ (t-1)]/n, T is system time after calibration, T(t) be present system time, δ (t-n) is t-n moment system time and the difference of reference time, after gps signal recovers, carry out accurate calibration again.Here the time that reference time provides for GPS time service equipment, t is current time, and in units of millisecond, n is general, and value is not less than 100.
Claims (2)
1. a single-point fixes electronic police system automatic correcting time method, described electronic police system comprises cabinet and is arranged on the main control system in cabinet, it is characterized in that GPS external antenna being attached to cabinet or the vertical rod that single-point fixes electronic police system, GPS external antenna is linked by signal wire and GPS time service equipment, GPS time service equipment is connected with main control system by standard USB port, the UTC date that main control system reading GPS time service equipment provides, time data, adjustment main control system system time, candid camera carries out time calibration with main control system system time.
2. single-point as claimed in claim 1 fixes electronic police system automatic correcting time method, it is characterized in that losing for a long time when meeting gps signal, then get the adjusted value of average as present system time of historical calibration deviation, computing formula is: T=T(t)+[δ (t-n)+δ (t-n-1)+... + δ (t-1)]/n, T is system time after calibration, T(t) be present system time, δ (t-n) is t-n moment system time and the difference of reference time, after gps signal recovers, carry out accurate calibration again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510367698.5A CN105068416A (en) | 2015-06-29 | 2015-06-29 | Single-point fixed electronic police system automatic time correcting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510367698.5A CN105068416A (en) | 2015-06-29 | 2015-06-29 | Single-point fixed electronic police system automatic time correcting method |
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| Publication Number | Publication Date |
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| CN105068416A true CN105068416A (en) | 2015-11-18 |
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| CN201510367698.5A Pending CN105068416A (en) | 2015-06-29 | 2015-06-29 | Single-point fixed electronic police system automatic time correcting method |
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Citations (7)
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| CN101340665A (en) * | 2008-08-15 | 2009-01-07 | 青岛海信移动通信技术股份有限公司 | Method and terminal for time calibrating |
| CN100535824C (en) * | 2004-09-23 | 2009-09-02 | 华为技术有限公司 | Method of improving satellite time synchronuos pulse holding performance |
| CN101562475A (en) * | 2008-04-18 | 2009-10-21 | 深圳市朗科科技股份有限公司 | Time calibration device and time calibration method |
| CN201936449U (en) * | 2011-03-04 | 2011-08-17 | 山东鼎讯信息产业有限公司 | Multifunctional combined electronic police system |
| CN202929374U (en) * | 2012-10-31 | 2013-05-08 | 天津市电力公司 | Voltage monitor time calibration circuit |
| CN103135441A (en) * | 2013-02-04 | 2013-06-05 | 常州银丰科技有限公司 | Global position system (GPS) timing device and running method thereof |
| CN103197534A (en) * | 2012-01-06 | 2013-07-10 | 中兴通讯股份有限公司 | Time calibration method and device |
-
2015
- 2015-06-29 CN CN201510367698.5A patent/CN105068416A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100535824C (en) * | 2004-09-23 | 2009-09-02 | 华为技术有限公司 | Method of improving satellite time synchronuos pulse holding performance |
| CN101562475A (en) * | 2008-04-18 | 2009-10-21 | 深圳市朗科科技股份有限公司 | Time calibration device and time calibration method |
| CN101340665A (en) * | 2008-08-15 | 2009-01-07 | 青岛海信移动通信技术股份有限公司 | Method and terminal for time calibrating |
| CN201936449U (en) * | 2011-03-04 | 2011-08-17 | 山东鼎讯信息产业有限公司 | Multifunctional combined electronic police system |
| CN103197534A (en) * | 2012-01-06 | 2013-07-10 | 中兴通讯股份有限公司 | Time calibration method and device |
| CN202929374U (en) * | 2012-10-31 | 2013-05-08 | 天津市电力公司 | Voltage monitor time calibration circuit |
| CN103135441A (en) * | 2013-02-04 | 2013-06-05 | 常州银丰科技有限公司 | Global position system (GPS) timing device and running method thereof |
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Application publication date: 20151118 |