CN202978972U - Device for realizing synchronous external timing system through network and parallel port - Google Patents
Device for realizing synchronous external timing system through network and parallel port Download PDFInfo
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- CN202978972U CN202978972U CN 201220705190 CN201220705190U CN202978972U CN 202978972 U CN202978972 U CN 202978972U CN 201220705190 CN201220705190 CN 201220705190 CN 201220705190 U CN201220705190 U CN 201220705190U CN 202978972 U CN202978972 U CN 202978972U
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Abstract
The utility model discloses a device for realizing a synchronous external timing system through a network and a parallel port. The synchronous external timing system device provided by the utility model is composed of a time receiving module, a frequency receiving module, a parallel port cable and a network cable, and is characterized in that the time receiving module receives the time information of the external timing system and the information is transmitted through the network cable, and the frequency receiving module receives the frequency pulses of the external timing system and the information is transmitted through the parallel port cable. The device for realizing the synchronous external timing system through the network and the parallel port is capable of achieving the purpose of the synchronous external timing system in a low cost way, wherein all the used hardware devices (such as the standard network interface and parallel port interface) can be found in most systems without additional purchase.
Description
Technical field
The utility model relates generally to the computer control field, and particularly the synchronous device of system when outside is realized in a kind of network and parallel port of utilizing.
Background technology
" time system " is the abbreviation of timing system, and it can provide accurate, unified standard time and frequency signal for the user.Information Condition lower network technology is used very extensive, and the small time deviation that different time standards and synchronous error cause can directly cause data interaction delay or rebound between computer system.People to the metering ability of time and instructions for use far away higher than the visual sense ability, unified time tolerance and standard time and adopt the split-second precision frequency measuring equipment more and more important.
System method of synchronization when at present commonly used: a kind of is to be passed to the time system receiver module of client by dedicated signal lines by timing equipment, by this resume module and realize synchronous system when outside.The use cost of this mode is high, needs special-purpose hardware device support.Another kind of mode only depends on network communication and realizes, as foundation NTP(Network Time Protocol, NTP (Network Time Protocol)) carry out time synchronized between timing equipment and client.But the manner need to be transmitted repeatedly message two equipment end usually, calculates round trip delay time and the system time difference of NTP message to obtain abundant information, and network bandwidth requirements is higher, system synchro system when not being suitable for high accuracy.
The utility model content
The purpose of this utility model is to provide a kind of network and parallel port of utilizing to realize the synchronous device of system when outside.
The technical scheme that realizes the utility model purpose is: the synchronous device of system when outside is realized in a kind of network and parallel port of utilizing, comprise timing equipment and transmission cable, wherein timing equipment comprises time receiver module and frequency receiver module, transmission cable comprises parallel port cable and network cable, described time receiver module is connected with network cable, the temporal information of system when receiving the outside; The frequency receiver module is connected with the parallel port cable, the frequency pulse of system when receiving the outside, and the other end of parallel port cable is connected with computer parallel port.
But operation principle of the present utility model is to utilize the characteristic of the ACK port response external interrupt signal of standard parallel interface, when system equipment sends pps pulse per second signal to the parallel port at that time, firmly interrupts by the bottom software real-time response, guarantees the synchronization accuracy of Microsecond grade.
The utility model compared with prior art, its beneficial effect is: when 1) the utility model can reach special-purpose without additional configuration, the system synchronization hardware is realized the synchronous purpose of system when outside; 2) the utility model utilizes mixed-media network modules mixed-media that client carries and parallel port to realize synchronous system when outside, gathers materials on the spot, and is easy to use, not only guarantees the synchronization accuracy of Microsecond grade, and need not to increase cost; 3) time system time and the pulse per second (PPS) two parts of signals utilized of the method for synchronization used of the utility model expanded the mode of system when synchronous.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Description of drawings
System synchro system block diagram when Fig. 1 is of the present utility model.
The schematic diagram of system access computer parallel port when Fig. 2 is outside of the present utility model.
Embodiment
In conjunction with Fig. 1, the synchronous device of system when outside is realized in a kind of network and parallel port of utilizing of the present utility model, comprise timing equipment and transmission cable, wherein timing equipment comprises time receiver module and frequency receiver module, transmission cable comprises parallel port cable and network cable, described time receiver module is connected with network cable, the temporal information of system when receiving the outside; The frequency receiver module is connected with the parallel port cable, the frequency pulse of system when receiving the outside, and the other end of parallel port cable is connected with computer parallel port.
Described frequency receiver module is by the ACK port receive interruption signal of computer parallel port, and real-time response external pulse, described ACK port are No. 10, parallel port port.
The utility model utilizes the client existing resource, and when realizing high accuracy by network and parallel interface, the system synchronizing function, both guaranteed synchronization accuracy, need not again to increase the additional hardware cost.
The step that realizes the utility model scheme is:
Step 1: utilize the mode of network communication to receive the temporal information that is sended over by the ground timing equipment, the synchronous local system time;
Step 2: after system time is synchronous, when when utilizing, system pulse per second (PPS) synchro system is walked.
In conjunction with Fig. 1, the utility model is applied in as shown in Figure 1 time system synchro system usually, and the client in this system need to receive the time system information and synchronous of timing equipment.The utility model receives time and the pulse per second (PPS) that is passed over by timing equipment, and wherein temporal information receives by the mode of network communication; Pulse per second (PPS) is by parallel port ACK port, and the mode of being interrupted by client end response receives.
The network delivery temporal information can be according to the communication of computer network time protocol, and agreement commonly used has NTP, SNTP and PTP etc.Client is obtained round trip delay time and the system time difference of message according to sending repeatedly message transmission in receiving course with timing equipment, revises the local system time.After the system time correction, when client is walked according to the pps pulse per second signal synchronised clock, concrete grammar be with the time the unite ACK port of pulse access parallel port, drive in the Client Design parallel port and receive parallel port interrupt real-time response external pulse.
In conjunction with Fig. 2, a chief component of the present utility model is for utilizing parallel port ACK to receive system pulse when outside.As shown in Figure 2, time system pulse signal access ACK(No. 10, parallel port port), client drives the real-time response pulse-break by design bottom parallel port.In multiple task operating system commonly used, hard interrupt levels is relatively high, and the response time can be controlled in Microsecond grade.
The utility model is by receiver module synchro system time time, when being walked by frequency receiver module synchro system.Timing equipment passes to client by network with temporal information, the synchronous local system time after client, parsing.System pulse signal when client receives by computer parallel port, the ACK port of this signal access computer parallel port is when realizing that by the mode of bottom software real-time response parallel port interrupt synchro system is walked.
Claims (2)
1. one kind is utilized network and parallel port to realize the synchronous device of system when outside, it is characterized in that, comprise timing equipment and transmission cable, wherein timing equipment comprises time receiver module and frequency receiver module, transmission cable comprises parallel port cable and network cable, described time receiver module is connected with network cable, the temporal information of system when receiving the outside; The frequency receiver module is connected with the parallel port cable, the frequency pulse of system when receiving the outside, and the other end of parallel port cable is connected with computer parallel port.
2. the synchronous device of system when outside is realized in network and the parallel port of utilizing according to claim 1, it is characterized in that, described frequency receiver module is by the ACK port receive interruption signal of computer parallel port, and real-time response external pulse, described ACK port are No. 10, parallel port port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220705190 CN202978972U (en) | 2012-12-19 | 2012-12-19 | Device for realizing synchronous external timing system through network and parallel port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220705190 CN202978972U (en) | 2012-12-19 | 2012-12-19 | Device for realizing synchronous external timing system through network and parallel port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202978972U true CN202978972U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220705190 Expired - Lifetime CN202978972U (en) | 2012-12-19 | 2012-12-19 | Device for realizing synchronous external timing system through network and parallel port |
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| CN (1) | CN202978972U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111459009A (en) * | 2020-04-21 | 2020-07-28 | 哈尔滨工业大学 | Random error estimation system and estimation method for synchronization of multiple digital electronic devices |
-
2012
- 2012-12-19 CN CN 201220705190 patent/CN202978972U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111459009A (en) * | 2020-04-21 | 2020-07-28 | 哈尔滨工业大学 | Random error estimation system and estimation method for synchronization of multiple digital electronic devices |
| CN111459009B (en) * | 2020-04-21 | 2021-08-17 | 哈尔滨工业大学 | Random error estimation system and estimation method for synchronization of multiple digital electronic devices |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xiang Hui Inventor after: Zhang Xingtang Inventor after: Meng Guangqun Inventor after: Zhou Hao Inventor after: Zhang Meng Inventor after: Wang Weixing Inventor before: Xiang Hui Inventor before: Zhang Xingtang Inventor before: Meng Guangqun Inventor before: Zhou Hao Inventor before: Zhang Meng Inventor before: Wang Weixing |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Lianyungang City, Jiangsu province 222006 Lian Hai Road No. 42 Patentee after: The 716th Research Institute of China Shipbuilding Corp. Address before: Lianyungang City, Jiangsu province 222006 Lian Hai Road No. 42 Patentee before: 716TH RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRY Corp. |
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| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
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| CX01 | Expiry of patent term |