CN204515158U - Offshore shooting instrument digital packets information acquisition time synchronism apparatus - Google Patents
Offshore shooting instrument digital packets information acquisition time synchronism apparatus Download PDFInfo
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- CN204515158U CN204515158U CN201520065310.1U CN201520065310U CN204515158U CN 204515158 U CN204515158 U CN 204515158U CN 201520065310 U CN201520065310 U CN 201520065310U CN 204515158 U CN204515158 U CN 204515158U
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- clock
- instruction
- digital packets
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- synchronous control
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Abstract
The utility model relates to offshore shooting equipment technical field, particularly relate to a kind of offshore shooting instrument digital packets information acquisition time synchronism apparatus, comprise time command reference cell and several clock synchronous control modules, by time command line with return order line signal and be connected between described time command reference cell with described clock synchronous control module and between adjacent clock synchronous control module.The temporal information that clock synchronous control module time of reception instruction reference cell in all digital packets sends, and from this information, recover the work clock of digital packets at the corresponding levels, ensure that the homology of work clock, eliminate the frequency difference of each digital packets work clock.
Description
Technical field
The utility model relates to offshore shooting equipment technical field, particularly relates to a kind of offshore shooting instrument digital packets information acquisition time synchronism apparatus.
Background technology
Digital packets is the ingredient that instrument most critical is surveyed in oceanic earthquake, is responsible for the information gathering the inner nautical receiving set of offshore shooting instrument towing cable.Digital packets is made up of data acquisition circuit, data transmission circuit, electrifying control circuit and time synchronism apparatus.Digital packets interval ultimate range reaches 300 meters, and whole system can be made up of 40-80 numeral bag, and digital packets is distributed in the distance reaching tens kms.When in prior art, offshore shooting instrument gathers earthquake information, there is frequency difference in each digital packets work clock, all digital packets cannot gather in the same time.
Utility model content
The purpose of this utility model is the deficiency overcoming above-mentioned technology, and a kind of offshore shooting instrument digital packets information acquisition time synchronism apparatus is provided, be used for controlling after all digital packets receive acquisition instructions, time in this digital packets is corrected, controls that data acquisition circuit in this digital packets is synchronous with the data acquisition circuit in other digital packets to be gathered simultaneously.
The utility model for achieving the above object, by the following technical solutions:
A kind of offshore shooting instrument digital packets information acquisition time synchronism apparatus, it is characterized in that: comprise time command reference cell and several clock synchronous control modules, by time command line with return order line signal and be connected between described time command reference cell with described clock synchronous control module and between adjacent clock synchronous control module; Described time command reference cell arranges register, control instruction register and passback instruction process unit form primarily of GPS interface, clock instruction modulating unit, sample frequency, described GPS interface, sample frequency arrange register, control instruction register and are connected with described clock instruction modulating unit respectively, described clock instruction modulating unit is connected with described clock instruction line, and described passback instruction process unit is connected with described passback order line.
Preferably, described clock synchronous control module is formed primarily of clock instruction processing unit, digital packets passback instruction process unit, the input end of described clock instruction processing unit is connected with described clock instruction line respectively with output terminal, and the input end of described digital packets passback instruction process unit is connected with described passback order line respectively with output terminal; Described clock instruction processing unit is connected with synchronous acquisition control module and delay process unit, and described delay process unit returns instruction process unit with described digital packets respectively and described synchronous acquisition control module is connected.
The beneficial effects of the utility model are: the temporal information that the clock synchronous control module time of reception instruction reference cell 1, in all digital packets sends, and from this information, recover the work clock of digital packets at the corresponding levels, ensure that the homology of work clock, eliminate the frequency difference of each digital packets work clock;
2, the clock synchronous control module in digital packets achieves the calculating to command time delay, and realizes the calibration to the sampling time of digital packets at the corresponding levels according to result of calculation, eliminates the deviation in each digital packets sampling time.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is time command reference cell inner structure block diagram;
Fig. 3 is clock synchronous control module cut-away view.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing and preferred embodiment.As depicted in figs. 1 and 2, a kind of offshore shooting instrument digital packets information acquisition time synchronism apparatus, comprise time command reference cell and several clock synchronous control modules, by time command line with return order line signal and be connected between described time command reference cell with described clock synchronous control module and between adjacent clock synchronous control module; Described time command reference cell arranges register, control instruction register and passback instruction process unit form primarily of GPS interface, clock instruction modulating unit, sample frequency, described GPS interface, sample frequency arrange register, control instruction register and are connected with described clock instruction modulating unit respectively, described clock instruction modulating unit is connected with described clock instruction line, and described passback instruction process unit is connected with described passback order line.Time command reference cell receives gps time information, according to the sample frequency of Operation system setting, periodically to the clock synchronous control module transmitting time in digital packets and command information; Clock synchronous control module in different digital bag is cascaded by clock instruction line, passback order line.
Clock synchronous control module is formed primarily of clock instruction processing unit, digital packets passback instruction process unit as described in Figure 3, the input end of described clock instruction processing unit is connected with described clock instruction line respectively with output terminal, and the input end of described digital packets passback instruction process unit is connected with described passback order line respectively with output terminal; Described clock instruction processing unit is connected with synchronous acquisition control module and delay process unit, and described delay process unit returns instruction process unit with described digital packets respectively and described synchronous acquisition control module is connected.
The temporal information that clock synchronous control module time of reception instruction reference cell in all digital packets sends, and from this information, recover the work clock of digital packets at the corresponding levels, ensure that the homology of work clock, eliminate the frequency difference of each digital packets work clock; Clock synchronous control module in digital packets achieves the calculating to command time delay, and realizes the calibration to the sampling time of digital packets at the corresponding levels according to result of calculation, eliminates the deviation in each digital packets sampling time.
Principle of work:
Time command reference cell receives GPS information, produces work clock thus, and clock synchronous control module sends.Time command reference cell, according to the sample frequency of Operation system setting, periodically modulates sampling instruction and steering order in clock signal.
The clock signal that clock synchronous control module time of reception instruction reference cell sends, recovers the work clock of digital packets at the corresponding levels, and is forwarded by downward for the clock signal of time command reference cell Primary Clock synchronous control unit.Under digital packets all is like this operated in same clock, eliminate the frequency difference between digital packets.
Time command reference cell, to clock synchronous control module tranmitting data register calibration command, records after each clock synchronous control module receives this instruction and carves t1 at that time, then this instruction is forwarded to next clock synchronous control module; This instruction returns from passback order line to time command reference cell by last clock synchronous control module.Each clock synchronous control module record passback order line receives the moment t2 of clock alignment instruction.Each clock synchronous control module receives the time interval t=t2-t1 of 2 clock alignment instructions, and namely t/2 is that acquisition instructions transfers to the time needed for last clock synchronous control module from this time synchronized unit.
The clock synchronous control module of each digital packets utilizes the time interval t measured to control all digital packets sample circuit synchronous workings, and each digital packets, after receiving sampling instruction, postpones the time triggered sampling circuit samples of t/2.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (2)
1. an offshore shooting instrument digital packets information acquisition time synchronism apparatus, it is characterized in that: comprise time command reference cell and several clock synchronous control modules, by time command line with return order line signal and be connected between described time command reference cell with described clock synchronous control module and between adjacent clock synchronous control module; Described time command reference cell arranges register, control instruction register and passback instruction process unit form primarily of GPS interface, clock instruction modulating unit, sample frequency, described GPS interface, sample frequency arrange register, control instruction register and are connected with described clock instruction modulating unit respectively, described clock instruction modulating unit is connected with described clock instruction line, and described passback instruction process unit is connected with described passback order line.
2. offshore shooting instrument digital packets information acquisition time synchronism apparatus according to claim 1, it is characterized in that: described clock synchronous control module is formed primarily of clock instruction processing unit, digital packets passback instruction process unit, the input end of described clock instruction processing unit is connected with described clock instruction line respectively with output terminal, and the input end of described digital packets passback instruction process unit is connected with described passback order line respectively with output terminal; Described clock instruction processing unit is connected with synchronous acquisition control module and delay process unit, and described delay process unit returns instruction process unit with described digital packets respectively and described synchronous acquisition control module is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520065310.1U CN204515158U (en) | 2015-01-30 | 2015-01-30 | Offshore shooting instrument digital packets information acquisition time synchronism apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520065310.1U CN204515158U (en) | 2015-01-30 | 2015-01-30 | Offshore shooting instrument digital packets information acquisition time synchronism apparatus |
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| Publication Number | Publication Date |
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| CN204515158U true CN204515158U (en) | 2015-07-29 |
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| CN201520065310.1U Expired - Fee Related CN204515158U (en) | 2015-01-30 | 2015-01-30 | Offshore shooting instrument digital packets information acquisition time synchronism apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884814A (en) * | 2017-12-15 | 2018-04-06 | 合肥国为电子有限公司 | High duplication between channels seismic prospecting instrument and its order perform time delay computational methods |
-
2015
- 2015-01-30 CN CN201520065310.1U patent/CN204515158U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884814A (en) * | 2017-12-15 | 2018-04-06 | 合肥国为电子有限公司 | High duplication between channels seismic prospecting instrument and its order perform time delay computational methods |
| CN107884814B (en) * | 2017-12-15 | 2023-08-25 | 合肥国为电子有限公司 | High-channel consistency seismic prospecting instrument and command execution delay time calculating method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20180130 |