CN104020489B - Comprehensive control method and device for achieving offshore geophysical exploration - Google Patents
Comprehensive control method and device for achieving offshore geophysical exploration Download PDFInfo
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Abstract
The invention discloses a comprehensive control method and device for achieving offshore geophysical exploration. The method includes the steps that the comprehensive control device obtains GPS time information, GPS position information and sensor information periodically; the comprehensive control device judges the effectiveness of the GPS time information according to the obtained GPS time information and a preset deviation threshold value and performs reference interval updating and chronometer time calibration; the comprehensive control device marks obtaining moments of all information in first comprehensive information and second comprehensive information according to the obtained GPS position information, the sensor information and the chronometer time and sends the marked first comprehensive information and the marked second comprehensive information to a navigation working station; the comprehensive control device obtains gun control starting information and extracts and sends a shooting instruction to a gun control system; gun control synchronous information is obtained, and record information is sent to a comprehensive recording system. According to the technical scheme, due to the judgment of time effectiveness based on a reference interval, it is well avoided that ineffective time is used for time calibration, and therefore the requirement for high-precision and high-reliability comprehensive control is met.
Description
Technical Field
The invention relates to the marine geophysical exploration technology, in particular to a comprehensive control method and a comprehensive control device for realizing marine geophysical exploration.
Background
With the rapid development of offshore oil and gas exploration and production, higher requirements are put forward on the automation and integration of the comprehensive control of offshore geophysical exploration. The comprehensive control of offshore geophysical exploration is used for coordinating and controlling various devices on the sea to complete respective work within a preset time, so as to command the implementation of offshore oil and gas exploration. Since offshore geophysical exploration involves various mechanical, electronic, acoustic and other types of equipment, which are complex in kind, large in number and high in control accuracy requirement, the comprehensive control method for offshore geophysical exploration is a very complex and high-accuracy scheduling method, and high-accuracy control and high automation and integration are required.
In general, an integrated control system for marine geophysical prospecting is used to control, communicate or coordinate a system of multiple independent devices or facilities, comprising: geophysical prospecting ship, towing cable, gun control system, detector recording system, comprehensive recording system, navigation workstation, various sensors, GPS satellite, etc. Wherein, the geophysical prospecting ship is mainly used for towing a towline and carrying various devices or systems; a streamer is a cable used to connect geophones that record geophysical information, typically a geophysical vessel towing a plurality of streamers, each streamer including a plurality of geophones thereon; the gun control system is used for controlling seismic source cannons to generate seismic waves required by geophysical exploration, wherein the seismic source is usually composed of a plurality of sub seismic sources, and each sub seismic source of the same seismic source is usually controlled to simultaneously cannon; the geophone recording system is a recording system consisting of a plurality of geophones and is used for recording reflected wave information generated by seismic waves reflected by an underground interface, and the reflected wave information is called as shot record in actual operation; and the navigation workstation is used for completing high-precision calculation of information required by comprehensive control. The integrated control system communicates with various sensors to obtain relevant information, such as the speed of the geophysical vessel through the water, and communicates with GPS satellites to obtain relevant information.
The existing comprehensive control system for marine geophysical exploration is scheduled and controlled based on second-level time precision, the time precision is not high, a time validity judging function is lacked before time calibration or the accuracy of the time validity judging function is not high, and the risk of using invalid time to carry out time calibration exists, so that the requirements of high-precision and high-reliability comprehensive control cannot be met; in addition, the integration level of the existing comprehensive control system for offshore geophysical exploration is not high, a plurality of discrete systems are required to be matched together to realize comprehensive control, and the complexity of design, debugging and deployment is increased, so that the requirements of high automation and high integration level of the comprehensive control for offshore geophysical exploration are difficult to meet.
Disclosure of Invention
In order to solve the technical problems, the invention provides a comprehensive control method and a comprehensive control device for realizing marine geophysical exploration, which can effectively improve the precision and the reliability of the comprehensive control, thereby meeting the requirements of the high-precision and high-reliability comprehensive control of the marine geophysical exploration.
In order to achieve the aim of the invention, the invention discloses a comprehensive control method for realizing marine geophysical exploration, which comprises the following steps:
the integrated control device periodically acquires GPS time information, GPS position information and sensor information;
the comprehensive control device judges the validity of the GPS time information according to the obtained GPS time information and a preset deviation threshold value, and performs reference interval updating and precise time calibration;
the integrated control device marks the acquisition time of each information in the first integrated information and the second integrated information according to the acquired GPS position information, the sensor information and the precise time, and sends the marked first integrated information and the marked second integrated information to the navigation workstation;
the comprehensive control device acquires gun control starting information, extracts a gun sounding instruction and sends the gun sounding instruction to the gun control system; and acquiring gun control synchronization information and sending the recording information to the comprehensive recording system.
The GPS time information is periodic information and comprises GPS pulse and GPS absolute time;
the steps of judging the validity of the GPS time information, updating the reference interval and calibrating the precise time specifically comprise:
calculating a GPS pulse interval and a deviation thereof from a maintained reference interval according to the obtained GPS pulse;
determining whether the GPS pulse is effective or not according to the obtained deviation and a preset deviation threshold value;
and when the GPS pulse is effective, updating the reference interval and calibrating the precise time according to the effective GPS pulse interval and the GPS absolute time.
The reference interval update includes: and calculating an average value of the reference interval and the GPS pulse interval, and taking the average value as the reference interval, wherein the reference interval is preset as the number of the precise clock cycles corresponding to the GPS pulse cycle.
The precise time comprises time above the second level and time below the second level;
the fine time calibration comprises: the time above the second is updated with the GPS absolute time corresponding to the GPS pulse and counting of the time below the second is restarted from zero.
The GPS position information is periodic information;
the sensor information is periodic information and at least comprises the following steps: the ground speed, water speed and direction of the geophysical vessel, and the depth of and distance between the streamers;
the first integrated information includes: the ground speed, water speed, position and direction of the geophysical prospecting ship and all times for acquiring the information;
the second integrated information includes: the depth of the streamers and the distance between the streamers and the times at which this information is acquired;
the gun control starting information comprises information of shot firing moments of seismic sources in each place;
the gun control synchronization information comprises the sound gun time intervals of all the sub seismic sources in each region;
the recording information includes at least: gun control synchronization information, first comprehensive information and second comprehensive information.
The invention also discloses a comprehensive control device for realizing the marine geophysical exploration, which comprises an information acquisition unit, a time calibration unit, an information comprehensive unit, a gun control communication unit and a recording system communication unit, wherein,
the information acquisition unit is used for periodically acquiring GPS time information, GPS position information and sensor information;
the time calibration unit is used for judging the validity of the GPS time information according to the GPS time information from the information acquisition unit and a preset deviation threshold value, and performing reference interval updating and precise time calibration;
the information integration unit is used for marking the acquisition time of each piece of information in the first integrated information and the second integrated information according to the GPS position information and the sensor information from the information acquisition unit and the precise time from the time calibration unit and sending the marked first integrated information and the marked second integrated information to the navigation workstation;
the gun control communication unit is used for acquiring gun control starting information, extracting a gun sounding instruction and sending the gun sounding instruction to the gun control system;
and the recording system communication unit is used for acquiring gun control synchronization information and sending the recording information to the comprehensive recording system.
The GPS time information is periodic information and comprises GPS pulse and GPS absolute time;
the time calibration unit comprises a deviation calculation module, a pulse validity judgment module and an update calibration module, wherein,
the deviation calculation module is used for calculating the GPS pulse interval and the deviation between the GPS pulse interval and the maintained reference interval according to the GPS pulse from the information acquisition unit;
the pulse validity judging module is used for determining whether the GPS pulse is valid or not according to the deviation from the deviation calculating module and a preset deviation threshold;
and the updating and calibrating module is used for updating the reference interval and calibrating the precise time according to the effective GPS pulse interval and the GPS absolute time when the GPS pulse is effective.
The reference interval update includes: and calculating an average value of the reference interval and the GPS pulse interval, and taking the average value as the reference interval, wherein the reference interval is preset as the number of the precise clock cycles corresponding to the GPS pulse cycle.
The precise time comprises time above the second level and time below the second level;
the fine time calibration comprises: updating the time above the second level by using the GPS absolute time corresponding to the GPS pulse, and restarting the counting of the time below the second level from zero;
the GPS position information is periodic information;
the sensor information is periodic information and at least comprises the following steps: the ground speed, water speed and direction of the geophysical vessel, and the depth of and distance between the streamers;
the first integrated information includes: the ground speed, water speed, position and direction of the geophysical prospecting ship and all times for acquiring the information;
the second integrated information includes: the depth of the streamers and the distance between the streamers and the time instants at which this information is acquired.
The gun control starting information comprises information of shot firing moments of seismic sources in each place;
the gun control synchronization information comprises the sound gun time intervals of all the sub seismic sources in each region;
the recording information includes at least: gun control synchronization information, first comprehensive information and second comprehensive information.
Compared with the prior art, the technical scheme of the invention comprises the following steps: the integrated control device periodically acquires GPS time information, GPS position information and sensor information; the comprehensive control device judges the validity of the GPS time information according to the obtained GPS time information and a preset deviation threshold value, and performs reference interval updating and precise time calibration; the integrated control device marks the acquisition time of each piece of information in the first integrated information and the second integrated information according to the acquired GPS position information, the sensor information and the precise time, and sends the marked first integrated information and the marked second integrated information to the navigation workstation; the comprehensive control device acquires gun control starting information, extracts a gun sounding instruction and sends the gun sounding instruction to the gun control system; and acquiring gun control synchronization information and sending the recording information to the comprehensive recording system. According to the technical scheme provided by the invention, on one hand, the time validity judgment based on the reference interval well avoids using invalid time for time calibration, and improves the time precision by combining the precision time, so that the requirements of high-precision and high-reliability comprehensive control are well met, and on the other hand, the method replaces the traditional comprehensive control method formed by jointly matching a plurality of discrete systems, reduces the complexity of design, debugging and deployment, and thus well meets the requirements of high automation and high integration of the comprehensive control of the offshore geophysical exploration.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a flow chart of an integrated control method for performing offshore geophysical prospecting in accordance with the present invention;
FIG. 2 is a flowchart of an embodiment of the present invention for determining the validity of GPS time information, updating the reference interval, and calibrating the precise time;
FIG. 3 is a schematic diagram of the structure of the integrated control device for offshore geophysical exploration according to the present invention;
FIG. 4 is a schematic diagram of a time calibration unit in the integrated control device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
FIG. 1 is a flow chart of the integrated control method for marine geophysical prospecting according to the present invention, as shown in FIG. 1, including:
step 101: the integrated control device periodically acquires GPS time information, GPS position information, and sensor information. Wherein,
in this step, the acquisition of the GPS time information, the GPS position information, and the sensor information is a conventional technical means for those skilled in the art, and is not described herein again. It should be noted that, since the respective acquisition periods of these pieces of information may be different, this step may be performed independently for each piece of information according to the respective periods.
In this step, the GPS time information is periodic information, and the GPS time information includes a GPS pulse and GPS absolute time, where the GPS pulse period is second-level time, for example, 1 second. The GPS absolute time is a numerical value including time, minute, and second of year, month, day, 1, day, 12 of 2014, 30 minutes, and 30 seconds. The GPS absolute time is included between two GPS pulses, corresponding one-to-one to the latter of the two GPS pulses including it.
In this step, the GPS position information is position information from a GPS satellite, and is used to indicate a latitude coordinate where the geophysical prospecting ship is located. The GPS position information may be periodically acquired from the GPS satellites by periodically transmitting GPS position information acquisition requests to the GPS satellites.
In this step, the sensor information is periodic information, and at least includes: the ground speed, water speed and direction of the geophysical vessel, and the depth of and distance between the streamers. The ground speed, the water speed and the direction of the geophysical prospecting ship are acquired through sensors arranged on the geophysical prospecting ship, and the depth of the towlines and the distance between the towlines are acquired through corresponding sensors arranged on the towlines.
Step 102: the integrated control device judges the validity of the GPS time information according to the obtained GPS time information and a preset deviation threshold value, and updates the reference interval and calibrates the precise time.
Fig. 2 is a flowchart of a specific implementation of this step, and as shown in fig. 2, the method includes:
step 201: from the acquired GPS pulses, the GPS pulse interval and its deviation from the maintained reference interval are calculated. In particular,
when the GPS pulse is obtained at the time of acquisition,
first, the GPS pulse time is calculated. Specifically, the GPS pulse time may be a value of a first count at the time of obtaining the GPS pulse. Wherein the first count is a count of the number of precise clock cycles since the start of execution of the integrated control method of the present invention. The precision clock period may be 50 nanoseconds, or 20 nanoseconds, or 10 nanoseconds. The specific implementation of counting is a routine technique for those skilled in the art, and is not described herein.
Then, a GPS pulse interval is calculated, which is the difference between the GPS pulse time and its last GPS pulse time.
Finally, the deviation of the GPS pulse interval from the maintained reference interval is calculated.
Step 202: and determining whether the GPS pulse is effective according to the obtained deviation and a preset deviation threshold value. Wherein,
the deviation threshold may be a positive or negative percentage relative to the reference interval, for example, a positive or negative one percent of the reference interval, or a positive or negative two percent of the reference interval.
If the calculated deviation is within the deviation threshold range, it indicates that the jitter of the GPS pulse interval is within the normal range, which is equivalent to that the GPS pulse interval is valid, i.e. the GPS pulse corresponding to the GPS pulse interval is valid, step 203 is executed, otherwise, the GPS pulse is invalid, step 102 is ended, i.e. step 103 is entered.
Step 203: and when the GPS pulse is effective, updating the reference interval and calibrating the precise time according to the effective GPS pulse interval and the GPS absolute time. Wherein,
the reference interval may be preset to the number of precise clock cycles corresponding to the GPS pulse cycle before updating the reference interval. That is, the reference interval is set in advance as the number of precise clock cycles corresponding to the GPS pulse interval in an ideal case where the GPS pulse interval has no jitter.
The reference interval update in this step may specifically include: an average of the reference interval and the GPS pulse interval is calculated and taken as the reference interval. That is, since the preset value of the reference interval can be understood as the average value of the GPS pulse intervals in the ideal case, the reference interval can be understood as: the average of all the obtained, valid GPS pulse intervals so that the variation of the normal jitter of the GPS pulse intervals can be dynamically reflected in the reference interval. Wherein,
the precise time calibration in this step may specifically include: and updating the time above the second by using the GPS absolute time corresponding to the GPS pulse, and restarting counting the time below the second from zero. Here, the time on the order of seconds or more is a numerical value including year, month, day, hour, minute and second, for example, 5, month, 1, day, 12, 30 minutes and 30 seconds in 2014, similarly to the GPS absolute time. Wherein
Restarting the counting of the time below the order of seconds from zero specifically means restarting the second counting from zero. Wherein the second count is a count of the number of precise clock cycles at which the second count is restarted.
The precision time is composed of time on the order of seconds or more and time on the order of seconds or less, wherein the time on the order of seconds or less is a numerical value of the second count. Because the description unit of time below the second level is a precise clock period of the nanosecond level, correspondingly, the precise time is also the nanosecond level time, and the time precision is obviously improved compared with the GPS absolute time of the second level.
As can be seen from steps 201 to 203, the precise time calibration is performed on the premise that the GPS time information is valid, that is, the GPS pulse and the GPS pulse interval are valid, so that it is avoided that invalid GPS time information is used for precise time calibration when the GPS pulse interval is too short, the GPS pulse interval is too long, or the GPS pulse is missed, thereby ensuring the accuracy of precise time. Further, the air conditioner is provided with a fan,
due to the updating method of the reference interval, the change of the normal jitter of the GPS pulse interval can be dynamically reflected in the reference interval, so that the validity judgment of the GPS time information is carried out on the basis of the reference interval, the situations that the GPS pulse interval is too short, the GPS pulse interval is too long or the GPS pulse is missed are more accurately found, and the accuracy of time calibration is effectively ensured.
Step 103: the integrated control device marks each information acquisition time in the first integrated information and the second integrated information according to the acquired GPS position information, the sensor information and the precise time, and transmits the marked first integrated information and the marked second integrated information to the navigation workstation.
The first integrated information includes: the speed of the geophysical vessel to the ground, the speed of the water, the position and direction, and the times at which this information is obtained. The second integrated information includes: the depth of the streamers and the distance between the streamers and the time instants at which this information is acquired. Wherein,
the acquisition time of the information may be marked by a time stamp, which is a numerical value of the precise time when the information is acquired.
The marked first and second integrated information are both sent to a navigation workstation for calculating relevant information, such as gun control activation information.
In this step, how to send the information to the navigation workstation is realized by the conventional technical means of those skilled in the art, and is not used to limit the protection scope of the present invention, and will not be described herein again.
Step 104: the comprehensive control device acquires gun control starting information, extracts a gun sounding instruction and sends the gun sounding instruction to the gun control system; and acquiring gun control synchronization information and sending the recording information to the comprehensive recording system. Wherein,
how to obtain gun control starting information from the navigation workstation, obtain gun synchronization information from the gun control system, and send a sound gun instruction and record information is a conventional technical means for those skilled in the art, and is not described herein again. Extracting the cannon command from the gun control start information is a conventional technical means for those skilled in the art, and is not described herein again.
In the step, gun control starting information comes from a navigation workstation and comprises information of shot firing moments of seismic sources in various places; the gun control synchronous information comes from a gun control system and comprises the gun time intervals of all the sub seismic sources in each region; and the gun command is used for starting the gun control system to execute the gun according to the gun time corresponding to the command. Simultaneously sending the shot-making instruction to a detector recording system for instructing the detector recording system to start recording shot records; the recording information at least comprises gun control synchronous information, first comprehensive information and second comprehensive information. Wherein, the recording information is transmitted to the comprehensive recording system and is recorded as related information in the comprehensive recording system together with the shot record recorded by the corresponding wave detector recording system.
Fig. 3 is a schematic diagram showing a configuration of an integrated control device for offshore geophysical exploration according to the present invention, which is shown in fig. 3 and includes an information acquisition unit, a time calibration unit, an information integration unit, a gun control communication unit, and a recording system communication unit, wherein,
the information acquisition unit is used for periodically acquiring GPS time information, GPS position information and sensor information; the GPS time information is periodic information and comprises GPS pulse and GPS absolute time; the GPS position information is periodic information; the sensor information is periodic information and at least comprises the following steps: the ground speed, water speed and direction of the geophysical vessel, and the depth of and distance between the streamers.
And the time calibration unit is used for judging the validity of the GPS time information according to the GPS time information from the information acquisition unit and a preset deviation threshold value, and performing reference interval updating and precise time calibration.
Fig. 4 is a schematic diagram of a structure of a time calibration unit in the integrated control device of the present invention, as shown in fig. 4, including an offset calculation module, a pulse validity determination module, and an update calibration module, wherein,
and the deviation calculation module is used for calculating the GPS pulse interval and the deviation thereof from the maintenance reference interval according to the GPS pulse from the information acquisition unit.
And the pulse validity judging module is used for determining whether the GPS pulse is valid according to the deviation from the deviation calculating module and a preset deviation threshold value.
And the updating and calibrating module is used for updating the reference interval and calibrating the precision time according to the effective GPS pulse interval and the GPS absolute time when the GPS pulse is effective, wherein the precision time comprises time more than the second level and time less than the second level. In particular,
the reference interval update includes: and calculating an average value of the reference interval and the GPS pulse interval, and taking the average value as the reference interval, wherein the reference interval is preset as the number of precise clock cycles corresponding to the GPS pulse cycle.
The precise time calibration comprises the following steps: the time above the second is updated with the GPS absolute time corresponding to the GPS pulse and counting of the time below the second is restarted from zero.
The information integration unit is used for marking the acquisition time of each piece of information in the first integrated information and the second integrated information according to the GPS position information and the sensor information from the information acquisition unit and the precise time from the time calibration unit and sending the marked first integrated information and the marked second integrated information to the navigation workstation; wherein the first general information includes: the ground speed, water speed, position and direction of the geophysical prospecting ship and the time for acquiring the information; the second integrated information includes: the depth of the streamers and the distance between the streamers and the time instants at which this information is acquired.
The gun control communication unit is used for acquiring gun control starting information, extracting a gun sounding instruction and sending the gun sounding instruction to the gun control system; the gun control starting information comprises information of shot firing time of each seismic source.
The recording system communication unit is used for acquiring gun control synchronization information and sending the recording information to the comprehensive recording system; wherein the recording information at least includes: gun control synchronization information, first comprehensive information and second comprehensive information.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A comprehensive control method for realizing marine geophysical exploration is characterized by comprising the following steps:
the integrated control device periodically acquires GPS time information, GPS position information and sensor information, wherein the GPS time information is periodic information and comprises GPS pulse and GPS absolute time;
the comprehensive control device judges the validity of the GPS time information according to the obtained GPS time information and a preset deviation threshold value, and performs reference interval updating and precise time calibration;
the integrated control device marks the acquisition time of each information in the first integrated information and the second integrated information according to the acquired GPS position information, the sensor information and the precise time, and sends the marked first integrated information and the marked second integrated information to the navigation workstation;
the comprehensive control device acquires gun control starting information, extracts a gun sounding instruction and sends the gun sounding instruction to the gun control system; acquiring gun control synchronization information and sending recording information to a comprehensive recording system;
the steps of judging the validity of the GPS time information, updating the reference interval and calibrating the precise time comprise:
calculating a GPS pulse interval and a deviation thereof from a maintained reference interval according to the obtained GPS pulse;
determining whether the GPS pulse is effective or not according to the obtained deviation and a preset deviation threshold value;
when the GPS pulse is effective, updating a reference interval and calibrating precise time according to the effective GPS pulse interval and the GPS absolute time;
wherein the reference interval update comprises: and calculating the average value of the reference interval and the GPS pulse interval, and taking the average value as the reference interval, wherein the reference interval is preset as the number of precise clock cycles corresponding to the GPS pulse cycle.
2. The integrated control method according to claim 1,
the precise time comprises time above the second level and time below the second level;
the fine time calibration comprises: the time above the second is updated with the GPS absolute time corresponding to the GPS pulse and counting of the time below the second is restarted from zero.
3. The integrated control method according to claim 1,
the GPS position information is periodic information;
the sensor information is periodic information and at least comprises the following steps: the ground speed, water speed and direction of the geophysical vessel, and the depth of and distance between the streamers;
the first integrated information includes: the ground speed, water speed, position and direction of the geophysical prospecting ship and all times for acquiring the information;
the second integrated information includes: the depth of the streamers and the distance between the streamers and the times at which this information is acquired;
the gun control starting information comprises information of shot firing moments of seismic sources in each place;
the gun control synchronization information comprises the sound gun time intervals of all the sub seismic sources in each region;
the recording information includes at least: gun control synchronization information, first comprehensive information and second comprehensive information.
4. An integrated control device for realizing marine geophysical exploration is characterized by comprising an information acquisition unit, a time calibration unit, an information integration unit, a gun control communication unit and a recording system communication unit, wherein,
the information acquisition unit is used for periodically acquiring GPS time information, GPS position information and sensor information, wherein the GPS time information is periodic information and comprises GPS pulse and GPS absolute time;
the time calibration unit is used for judging the validity of the GPS time information according to the GPS time information from the information acquisition unit and a preset deviation threshold value, and performing reference interval updating and precise time calibration; the time calibration unit comprises a deviation calculation module, a pulse validity judgment module and an update calibration module, wherein,
the deviation calculation module is used for calculating the GPS pulse interval and the deviation between the GPS pulse interval and the maintained reference interval according to the GPS pulse from the information acquisition unit;
the pulse validity judging module is used for determining whether the GPS pulse is valid or not according to the deviation from the deviation calculating module and a preset deviation threshold;
the updating and calibrating module is used for updating the reference interval and calibrating the precise time according to the effective GPS pulse interval and the GPS absolute time when the GPS pulse is effective;
wherein the reference interval update comprises: calculating an average value of the reference interval and the GPS pulse interval, and taking the average value as the reference interval, wherein the reference interval is preset as the number of precise clock cycles corresponding to the GPS pulse cycle;
the information integration unit is used for marking the acquisition time of each piece of information in the first integrated information and the second integrated information according to the GPS position information and the sensor information from the information acquisition unit and the precise time from the time calibration unit and sending the marked first integrated information and the marked second integrated information to the navigation workstation;
the gun control communication unit is used for acquiring gun control starting information, extracting a gun sounding instruction and sending the gun sounding instruction to the gun control system;
and the recording system communication unit is used for acquiring gun control synchronization information and sending the recording information to the comprehensive recording system.
5. The integrated control apparatus according to claim 4,
the precise time comprises time above the second level and time below the second level;
the fine time calibration comprises: the time above the second is updated with the GPS absolute time corresponding to the GPS pulse and counting of the time below the second is restarted from zero.
6. The integrated control apparatus according to claim 4,
the GPS position information is periodic information;
the sensor information is periodic information and at least comprises the following steps: the ground speed, water speed and direction of the geophysical vessel, and the depth of and distance between the streamers;
the first integrated information includes: the ground speed, water speed, position and direction of the geophysical prospecting ship and all times for acquiring the information;
the second integrated information includes: the depth of the streamers and the distance between the streamers and the times at which this information is acquired;
the gun control starting information comprises information of shot firing moments of seismic sources in each place;
the gun control synchronization information comprises the sound gun time intervals of all the sub seismic sources in each region;
the recording information includes at least: gun control synchronization information, first comprehensive information and second comprehensive information.
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| CN202102264U (en) * | 2011-06-24 | 2012-01-04 | 成都可为科技发展有限公司 | Rubidium clock taming system |
| CN103792519A (en) * | 2014-01-13 | 2014-05-14 | 中国科学院空间科学与应用研究中心 | Spaceborne radar clock drifting on-orbit correction method based on active calibrator |
| CN103838135A (en) * | 2014-02-24 | 2014-06-04 | 国家***第一海洋研究所 | Pulse signal precise timing device based on GPS module |
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| WO2008120381A1 (en) * | 2007-03-29 | 2008-10-09 | Panasonic Corporation | Signal capturing apparatus and signal capturing method |
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| CN202102264U (en) * | 2011-06-24 | 2012-01-04 | 成都可为科技发展有限公司 | Rubidium clock taming system |
| CN103792519A (en) * | 2014-01-13 | 2014-05-14 | 中国科学院空间科学与应用研究中心 | Spaceborne radar clock drifting on-orbit correction method based on active calibrator |
| CN103838135A (en) * | 2014-02-24 | 2014-06-04 | 国家***第一海洋研究所 | Pulse signal precise timing device based on GPS module |
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