CN202364237U - Clock source device based on GPS (global positioning system) and constant-temperature crystal oscillator - Google Patents
Clock source device based on GPS (global positioning system) and constant-temperature crystal oscillator Download PDFInfo
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- CN202364237U CN202364237U CN2011204173270U CN201120417327U CN202364237U CN 202364237 U CN202364237 U CN 202364237U CN 2011204173270 U CN2011204173270 U CN 2011204173270U CN 201120417327 U CN201120417327 U CN 201120417327U CN 202364237 U CN202364237 U CN 202364237U
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Abstract
The utility model relates to a clock source device based on a GPS (global positioning system) and a constant-temperature crystal oscillator, which comprises a constant-temperature crystal oscillation module, a main control module, a GPS module, a narrowing circuit module and an auxiliary control module. The main control module is connected with the auxiliary control module, the GPS module outputs one channel to be connected with the main control module and another channel to be connected with the auxiliary control module through the narrowing circuit module, and the constant-temperature crystal oscillation module is connected with the auxiliary control module. The GPS module receives satellite pulse signals per second, and the auxiliary control module resets a fractional-frequency module therein at regular time according to the satellite pulse signals per second and eliminates accumulated errors of the constant oscillator. The auxiliary control module is connected with a bi-polarity signal conversion module and can output bi-polarity signals. The constant-temperature crystal oscillator is connected with a crystal oscillation self-adjusting module, and when the GPS is in failure in short time, the self-adjusting module can adjust and reset the constant-temperature crystal oscillation module at regular time, and synchronous accuracy of output signals is guaranteed. Frequency signals can be synchronous with UTC (universal time coordinated) time by coordination of the GPS and the constant-temperature oscillator, phase error is smaller than 100ns, multiple facilities can operate synchronously by the aid of synchronous different frequency signals required by output users.
Description
(1) technical field
The utility model relates to the synchronous control technique field, is specially a kind of clock source device based on GPS and constant-temperature crystal oscillator.
(2) background technology
The transient electromagnetic detecting method is a kind of effective ways of geology detecting, is specially adapted to aspects such as ore deposit class material exploration, groundwater exploration, underground cavity detection.According to time-domain transient electromagnetic method principle; What receiver received is the pure secondary field that transmitter outage back is produced by underground geologic bodies; This just requires the necessary strict synchronism of Receiver And Transmitter; And synchronous error is at least less than 1 μ s, and so harsh synchronization accuracy is one of the key technology of transient electromagnetic detecting system just.Because transmitter spatially separates with receiver, this just need be the isochronous controller of transient electromagnetic measuring system specialized designs transmitter and receiver.
The transient electromagnetic detecting system realizes that the synchronous method of transmitter and receiver is mainly three kinds both at home and abroad at present: wired connection is synchronous, and wireless telecommunications are synchronous and the high-precision quartz clock is synchronous.These three kinds of method for synchronous all have bigger drawback, and it is a kind of cost-effective simultaneous techniques at transmitter and receiver when nearer that line locking is arranged, but when transmitter and receiver apart from each other, being difficult to adopt has line locking; Wireless telecommunications do not receive the influence of transmitter and receiver distance synchronously, are a kind of methods relatively more commonly used, disturb but be subject to the external environment factor; High-precision quartz clock method for synchronous is reliably effective, but the high-precision quartz clock costs an arm and a leg and the presynchronization time is longer.
(3) utility model content
The purpose of the utility model provides a kind of clock source device based on GPS and constant-temperature crystal oscillator, is furnished with GPS receiver and constant-temperature crystal oscillator, and the two cooperates, and improves synchronous precision and stability.
The clock source device based on GPS and constant-temperature crystal oscillator of the utility model design comprises constant-temperature crystal oscillator module and main control module, also comprises the GPS module, the circuit module that narrows and from controlling module.Main control module connects from the control module, and the two paths of signals one tunnel of GPS module output inserts main control module, another road is inserted from the control module through the circuit module that narrows, and the constant-temperature crystal oscillator module inserts from the control module.The GPS information that main control module receives shows on display module, and confirms the GPS location according to this effectively.
Main control module is a singlechip controller, is connected to display module and key-press module, by the required frequency values of key-press module input user, shows the information such as locating information, current output frequency and battery electric quantity of GPS at display module.
GPS (GPS is the abbreviation of Global Positioning System, i.e. global positioning system) module is the GPS receiver, receives the two-way pulse per second (PPS) time signal of satellite.This pps pulse per second signal and universal time UTC are synchronous, do not have accumulated error, are used for the frequency division submodule timing reset from the control module, regularly eliminate the accumulated error of constant-temperature crystal oscillator, make it also synchronous with universal time UTC.
Said constant-temperature crystal oscillator module is a constant-temperature crystal oscillator.The constant-temperature crystal oscillator of constant-temperature crystal oscillator module has phase voltage to regulate port, connects potentiometer, regulates its phase voltage.
The frequency signal that the constant-temperature crystal oscillator module produces directly inserts from the control module, carries out frequency division N time, and the required synchronous different frequency signals of output user makes the multiple devices synchronous working.
Narrow circuit module with the processing that narrows of the pps pulse per second signal of GPS module output; The square-wave signal of GPS pps pulse per second signal 100ms is become the burst pulse that fixed width reaches 200ns, use for frequency division submodule from the control module.
From the master chip of control module is CPLD (abbreviation of Complex Programmable Logic Device, i.e. CPLD controller) chip.Comprise that from the control module frequency division submodule and programmed control frequency produce submodule.Programmed control frequency produces submodule and at first judges the frequency signal frequency division number of times that the constant-temperature crystal oscillator module is imported according to user's frequency selection signal that main control module sends; And regularly the frequency division submodule is resetted according to the GPS pps pulse per second signal, make it synchronous with universal time.
Also be connected to the bipolar signal conversion module from the control module, export bipolarity ripple signal on demand.
The constant-temperature crystal oscillator module also is connected to crystal oscillator self-adjusting module, under the disarmed state of GPS module location, produces pps pulse per second signal by the constant-temperature crystal oscillator module and replaces gps signal, keeps high accuracy output.Per 1～2 hour of crystal oscillator self-adjusting module is to the constant-temperature crystal oscillator adjustment that once resets, to avoid the influence to this clock apparatus precision of accumulated error that constant-temperature crystal oscillator itself exists.
When the clock source device based on GPS and constant-temperature crystal oscillator that the utility model provides uses; Constant-temperature crystal oscillator to the constant-temperature crystal oscillator module carries out the phase voltage calibration earlier; Regulate the constant-temperature crystal oscillator phase voltage of constant-temperature crystal oscillator module and regulate the potentiometer that port connect, the constant-temperature crystal oscillator phase error that makes 2 clock apparatus is less than 1 μ s; The GPS module receives time signal by satellite, and the GPS pps pulse per second signal is sent into main control module and narrowed circuit module; By the frequency signal of key-press module to main control module input selection; Narrow circuit module with the processing that narrows of GPS pps pulse per second signal, and output to from the control module; Constant-temperature crystal oscillator module output 10MHZ clock frequency signal arrives from the control module; From the control module GPS pps pulse per second signal is counted whenever to detect 8 pulse per second (PPS)s and then frequency division module is carried out a reset operation, clock resetted once in per 8 seconds, can accurately produce frequency signal less than 1Hz.Main control module selects signal to be input to from the control module frequency; Select signal to handle from the frequency that the control module provides pps pulse per second signal, constant-temperature crystal oscillator clock signal and main control module, the frequency signal that output needs.
The utility model based on the advantage of the clock source device of GPS and constant-temperature crystal oscillator is: 1, the pps pulse per second signal under the situation of location, exported of GPS receiver has high precision and stability, and does not receive the distance and the influence of topography; And constant-temperature crystal oscillator can keep very high stability in a short time, is not subject to external condition and disturbs; The two combination makes the clock source device output frequency accurate synchronously in the pulse per second (PPS) of GPS receiver output; That is to say make frequency signal and world concordant time UTC (Universal Time Coordinated; UTC) time keeps synchronously; Eliminated the accumulated error of constant-temperature crystal oscillator, the synchronous signal frequency phase shift errors of output is less than 100ns; 2, when the GPS module can not reliably be located; Replace gps signal by the exportable pulse per second (PPS) of constant-temperature crystal oscillator module; The synchronous output that keeps this device; Under the invalid situation of GPS location, its frequency accuracy can maintain the interior duration of 1 μ s scope in 5 hours, had solved the short-duration failure problem of GPS in the actual transient electromagnetic detecting; 3, constant-temperature crystal oscillator self-adjusting module can regularly be adjusted the constant-temperature crystal oscillator module and reset, and eliminates its accumulated error, guarantees the synchronization accuracy of output signal; 4, can carry out the bipolarity conversion to the output signal, satisfy the requirement of adopting bipolarity ripple signal in the transient electromagnetic detecting; 5, be adapted to transient electromagnetic detecting field and CDMA and various instrument, instrument and the system harsh to the temporal frequency requirement.
(4) description of drawings
Fig. 1 is this clock source device example structure block diagram based on GPS and constant-temperature crystal oscillator
(5) embodiment
Primary structure based on the clock source device embodiment of GPS and constant-temperature crystal oscillator is as shown in Figure 1, comprise the GPS module, the circuit module that narrows, constant-temperature crystal oscillator module, crystal oscillator self-adjusting module, main control module, from control module and bipolar signal conversion module.Main control module connects from the control module, and the two paths of signals one tunnel of GPS module output inserts main control module, another road is inserted from the control module through the circuit module that narrows, and the constant-temperature crystal oscillator module inserts from the control module.The constant-temperature crystal oscillator module connects crystal oscillator self-adjusting module.Also connect the bipolar signal conversion module from the control module.Right 2 of figure point to right-hand arrows and represent to export signal, i.e. synchronous different frequency signals and the bipolar signal selected of user.
This routine main control module is a singlechip controller, is connected to display module and key-press module.
This example is the CPLD chip from the master chip of control module, comprises that frequency division submodule and programmed control frequency produce submodule.
The GPS module is the GPS receiver, and supporting provides accurate time service service to the application of strict positioning requirements; Can under the situation of having only a satellite, carry out GPS time service service in static running status, reduce the time service mistake that possibly cause because the location is wrong; This GPS module is used the quantization error that quantizes control information compensation clock pulse simultaneously, and precision can be up to 15ns.Under the situation that GPS effectively locatees, this GPS module can be exported the two-way pps pulse per second signal, and this signal Synchronization universal time UTC, does not have accumulated error; GPS pulse per second (PPS) temporal information is " reference point " that is used for taming the constant-temperature crystal oscillator module in this example; When each GPS pps pulse per second signal arrives; From the control module count, the per 8 seconds accumulated errors with this signal timing elimination constant-temperature crystal oscillator module make this routine clock source precision reach 100ns.
This routine constant-temperature crystal oscillator module adopts nominal 10,000, the constant-temperature crystal oscillator of 000Hz, and its temperature stability can be up to ± 5*10
-11, ageing rate can be low to moderate 5*10
-9Year, and very low to the change sensitivity of surrounding environment.The constant-temperature crystal oscillator of this routine constant-temperature crystal oscillator module has the phase voltage that connects potentiometer to regulate port.
The foregoing description is merely concrete example of purpose, technical scheme and beneficial effect further explain to the utility model, and the utility model is not to be defined in this.All any modifications of within the scope of disclosure of the utility model, being made, be equal to replacement, improvement etc., all be included within the protection range of the utility model.
Claims (5)
1. based on the clock source device of GPS and constant-temperature crystal oscillator, comprise constant-temperature crystal oscillator module and main control module, it is characterized in that:
Also comprise the GPS module, the circuit module that narrows and from the control module; Main control module connects from the control module, and the two paths of signals one tunnel of GPS module output inserts main control module, another road is inserted from the control module through the circuit module that narrows, and the constant-temperature crystal oscillator module inserts from the control module;
Main control module is a singlechip controller, is connected to display module and key-press module;
The GPS module is the GPS receiver of the two-way pulse per second (PPS) time signal of reception satellite;
Said constant-temperature crystal oscillator module is a constant-temperature crystal oscillator.
2. the clock source device based on GPS and constant-temperature crystal oscillator according to claim 1 is characterized in that:
The constant-temperature crystal oscillator of said constant-temperature crystal oscillator module has phase voltage to regulate port, connects potentiometer.
3. the clock source device based on GPS and constant-temperature crystal oscillator according to claim 1 and 2 is characterized in that:
Said master chip from the control module is the CPLD chip, comprises that frequency division submodule and programmed control frequency produce submodule.
4. the clock source device based on GPS and constant-temperature crystal oscillator according to claim 1 is characterized in that:
Said from the control module also be connected to the bipolar signal conversion module.
5. the clock source device based on GPS and constant-temperature crystal oscillator according to claim 1 and 2 is characterized in that:
Said constant-temperature crystal oscillator module also is connected to crystal oscillator self-adjusting module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204173270U CN202364237U (en) | 2011-10-28 | 2011-10-28 | Clock source device based on GPS (global positioning system) and constant-temperature crystal oscillator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011204173270U CN202364237U (en) | 2011-10-28 | 2011-10-28 | Clock source device based on GPS (global positioning system) and constant-temperature crystal oscillator |
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| CN202364237U true CN202364237U (en) | 2012-08-01 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510320A (en) * | 2011-10-28 | 2012-06-20 | 桂林电子科技大学 | Clock source device based on GPS (global positioning system) and constant-temperature crystal oscillator and synchronous control method |
| CN102830615A (en) * | 2012-09-05 | 2012-12-19 | 飞亚达（集团）股份有限公司 | Aviation timing method and system for providing dual time display and UTC (Universal Time Coordinated) timing and sending |
| CN106163026A (en) * | 2015-03-25 | 2016-11-23 | 福建吉星智能科技股份有限公司 | Quick control implementation method is dodged in the synchronization of a kind of modulator |
| CN107479357A (en) * | 2017-08-14 | 2017-12-15 | 江苏大利邦精密制造有限公司 | A kind of clock and watch intelligent tester |
-
2011
- 2011-10-28 CN CN2011204173270U patent/CN202364237U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510320A (en) * | 2011-10-28 | 2012-06-20 | 桂林电子科技大学 | Clock source device based on GPS (global positioning system) and constant-temperature crystal oscillator and synchronous control method |
| CN102830615A (en) * | 2012-09-05 | 2012-12-19 | 飞亚达（集团）股份有限公司 | Aviation timing method and system for providing dual time display and UTC (Universal Time Coordinated) timing and sending |
| CN102830615B (en) * | 2012-09-05 | 2014-04-16 | 飞亚达（集团）股份有限公司 | Aviation timing method and system for providing dual time display and UTC (Universal Time Coordinated) timing and sending |
| CN106163026A (en) * | 2015-03-25 | 2016-11-23 | 福建吉星智能科技股份有限公司 | Quick control implementation method is dodged in the synchronization of a kind of modulator |
| CN106163026B (en) * | 2015-03-25 | 2018-11-20 | 福建吉星智能科技股份有限公司 | A kind of synchronous quick control method of sudden strain of a muscle of modulator |
| CN107479357A (en) * | 2017-08-14 | 2017-12-15 | 江苏大利邦精密制造有限公司 | A kind of clock and watch intelligent tester |
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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 |
Granted publication date: 20120801 Termination date: 20141028 |
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| EXPY | Termination of patent right or utility model |