CN112881977A - High-precision self-calibration clock synchronization method based on Beidou or GPS - Google Patents
High-precision self-calibration clock synchronization method based on Beidou or GPS Download PDFInfo
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- CN112881977A CN112881977A CN202110039294.9A CN202110039294A CN112881977A CN 112881977 A CN112881977 A CN 112881977A CN 202110039294 A CN202110039294 A CN 202110039294A CN 112881977 A CN112881977 A CN 112881977A
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- 238000004891 communication Methods 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
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- Engineering & Computer Science (AREA)
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- Synchronisation In Digital Transmission Systems (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention relates to a Beidou or GPS-based high-precision self-calibration clock synchronization method, which comprises a mobile terminal, a Beidou or GPS receiver, an IRIG-B code transceiver module and a core chip, wherein the method is used for calibrating the standard time of the mobile terminal and comprises the following steps: the first step is as follows: the Beidou or GPS receiver receives GPS signals and transmits the GPS signals to the IRIG-B code transceiver module; the second step is that: and the IRIG-B code transceiver module converts the GPS signal into an IRIG-B code signal. According to the invention, the mobile terminal is timed and calibrated through the Beidou or GPS receiver, the time of the mobile terminal is calibrated in a form of each second by utilizing the GPS time, and when the Beidou or GPS signal is weak and is not detected for more than two seconds, the average time per second of each minute calculated through the core chip of the mobile terminal is used for rounding the calibration time to reduce the time difference per minute of the mobile terminal in a short time, so that the Beidou or GPS-based self-calibration clock synchronization method with high accuracy is realized.
Description
Technical Field
The invention relates to a high-precision self-calibration clock synchronization method based on Beidou or GPS.
Background
GPS is a satellite-based positioning system that was originally designed and controlled by the U.S. military and is available for free use by anyone. This system consists of 24 satellites orbiting in 6 intermediate orbits, one satellite orbiting for approximately 12 hours. Each satellite constantly transmits information about the current time, the positions of all satellites and some relevant data like almanac (almanac) and ephemeris (ephemeris). The GPS receiver uses this information to calculate the distance between itself and the satellite. To determine position, a GPS receiver must receive signals from at least three satellites.
Most of the existing mobile terminal clocks are calibrated by acquiring time through a mobile communication base station and calibrating the time of the mobile terminal, however, the loopback time of a wireless transmission module of the mobile terminal for receiving signals also changes, so that a high-precision self-calibration clock synchronization method based on Beidou or GPS is provided, and a more precise mobile terminal clock calibration method is provided.
Disclosure of Invention
The invention aims to provide a high-precision self-calibration clock synchronization method based on Beidou or GPS, and solves the problem that a more precise mobile terminal clock calibration method is lacked in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-precision self-calibration clock synchronization method based on Beidou or GPS comprises a mobile terminal, a Beidou or GPS receiver, an IRIG-B code transceiver module and a core chip, wherein the method is used for calibrating the standard time of the mobile terminal and comprises the following steps:
the first step is as follows: the Beidou or GPS receiver receives GPS signals and transmits the GPS signals to the IRIG-B code transceiver module;
the second step is that: the IRIG-B code transceiver module converts the GPS signal into an IRIG-B code signal;
the third step: the core chip records the tick number of the mobile terminal per minute to obtain the average tick number per second and stores the tick number;
the fourth step: checking tick number per second and IRIG-B code signal per second, and checking time by checking tick number of crystal oscillator of the mobile terminal per second;
the fifth step: when the signal receiving of the Beidou or GPS receiver is interrupted, the IRIG-B code transceiver module does not receive the GPS signal, and the mobile terminal corresponds to the integer of the average tick number per second calculated by the core chip per second.
Preferably, the mobile terminal includes a wireless network controller, the signal of the wireless network controller is obtained through a wireless communication base station, the loopback time of the signal obtained by the wireless network controller from the base station is a time difference, and the GPS standard time of the base station is calibrated with the time obtained by the GPS receiver of the mobile terminal through the time difference.
Preferably, when the tick number per second is calibrated with the IRIG-B code signal per second, the data processing time of the core chip is removed.
Preferably, the data processing time of the core chip is the calculation time of the chip processing system.
Preferably, the mobile terminal, the Beidou or GPS receiver, the IRIG-B code transceiver module, the core chip and the wireless network controller are all arranged in the same device.
Preferably, the IRIG-B code is in an alternating current AC code data modulation form.
The invention has at least the following beneficial effects:
1. the mobile terminal is timed and calibrated through the Beidou or GPS receiver, the time of the mobile terminal is calibrated in a form of each second by utilizing the GPS time, and when the Beidou or GPS signal is weak and the Beidou or GPS signal is not detected for more than two seconds, the average time per second of each minute calculated through a core chip of the mobile terminal is used for rounding the calibration time to reduce the time difference per minute of the mobile terminal in a short time, so that the high-accuracy self-calibration clock synchronization method based on the Beidou or GPS is realized.
2. The GPS time of the mobile terminal is calibrated with the GPS standard time of the wireless communication base station to reduce the time difference of the mobile terminal per second, and the time difference of the mobile terminal is further accurate by further accurately calculating the time of the core chip of the mobile terminal, so that the accuracy of the clock of the mobile terminal is further improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
A high-precision self-calibration clock synchronization method based on Beidou or GPS comprises a mobile terminal, a Beidou or GPS receiver, an IRIG-B code transceiver module and a core chip, and is used for calibrating the standard time of the mobile terminal and comprises the following steps:
the first step is as follows: the Beidou or GPS receiver receives GPS signals and transmits the GPS signals to the IRIG-B code transceiver module;
the second step is that: the IRIG-B code transceiver module converts the GPS signal into an IRIG-B code signal;
the third step: the core chip records the tick number of the mobile terminal per minute to obtain the average tick number per second and stores the tick number;
the fourth step: checking tick number per second and IRIG-B code signal per second, and checking time by checking tick number of crystal oscillator of the mobile terminal per second;
the fifth step: when the signal receiving of the Beidou or GPS receiver is interrupted, the IRIG-B code transceiver module does not receive the GPS signal, and the mobile terminal corresponds to the rounded average tick number per second calculated by the core chip per second;
in the embodiment, the mobile terminal is timed and calibrated through the Beidou or GPS receiver so as to improve the accuracy of the time of the mobile terminal, when the Beidou or GPS signal is weak and the Beidou or GPS signal is not detected for more than two seconds, the average per second per minute calculated by the core chip of the mobile terminal is used for rounding the calibration time, so that the time difference per minute of the mobile terminal in a short time is reduced, and the high-accuracy self-calibration clock synchronization method based on the Beidou or GPS is realized.
Example two
A high-precision self-calibration clock synchronization method based on Beidou or GPS comprises a mobile terminal, a Beidou or GPS receiver, an IRIG-B code transceiver module and a core chip, wherein the mobile terminal comprises a wireless network controller, a signal of the wireless network controller is obtained through a wireless communication base station, the loopback time of the signal obtained by the wireless network controller from the base station is a time difference, and the GPS standard time of the base station is calibrated with the time obtained by the GPS receiver of the mobile terminal through the time difference; the mobile terminal, the Beidou or GPS receiver, the IRIG-B code transceiver module, the core chip and the wireless network controller are all arranged in the same device; the method is used for calibrating the standard time of the mobile terminal and comprises the following steps:
the first step is as follows: the Beidou or GPS receiver receives GPS signals and transmits the GPS signals to the IRIG-B code transceiver module;
the second step is that: the IRIG-B code transceiver module converts the GPS signal into an IRIG-B code signal;
the third step: the core chip records the tick number of the mobile terminal per minute to obtain the average tick number per second and stores the tick number;
the fourth step: checking tick number per second and IRIG-B code signal per second, and checking time by checking tick number of crystal oscillator of the mobile terminal per second;
the fifth step: when the signal receiving of the Beidou or GPS receiver is interrupted, the IRIG-B code transceiver module does not receive the GPS signal, and the mobile terminal corresponds to the rounded average tick number per second calculated by the core chip per second;
in the embodiment, the GPS time of the mobile terminal is calibrated with the GPS standard time of the wireless communication base station, so that the time difference of the mobile terminal per second is reduced, and the accuracy of the clock of the mobile terminal is further improved.
EXAMPLE III
A high-precision self-calibration clock synchronization method based on Beidou or GPS comprises a mobile terminal, a Beidou or GPS receiver, an IRIG-B code transceiver module and a core chip, and is used for calibrating the standard time of the mobile terminal and comprises the following steps:
the first step is as follows: the Beidou or GPS receiver receives GPS signals and transmits the GPS signals to the IRIG-B code transceiver module;
the second step is that: the IRIG-B code transceiver module converts the GPS signal into an IRIG-B code signal; the IRIG-B code adopts an Alternating Current (AC) code data modulation form;
the third step: the core chip records the tick number of the mobile terminal per minute to obtain the average tick number per second and stores the tick number;
the fourth step: checking tick number per second and IRIG-B code signal per second, and checking time by checking tick number of crystal oscillator of the mobile terminal per second; when tick number per second and IRIG-B code signal per second are calibrated, removing data processing time of a core chip; the data processing time of the core chip is the calculation time of the chip processing system;
the fifth step: when the signal receiving of the Beidou or GPS receiver is interrupted, the IRIG-B code transceiver module does not receive the GPS signal, and the mobile terminal corresponds to the rounded average tick number per second calculated by the core chip per second;
in this embodiment, the time difference of the mobile terminal is further refined by further refining the calculation time of the core chip of the mobile terminal, and the accuracy of the time of the mobile terminal is further improved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A high-precision self-calibration clock synchronization method based on Beidou or GPS comprises a mobile terminal, a Beidou or GPS receiver, an IRIG-B code transceiver module and a core chip, and is used for calibrating the standard time of the mobile terminal, and is characterized by comprising the following steps:
the first step is as follows: the Beidou or GPS receiver receives GPS signals and transmits the GPS signals to the IRIG-B code transceiver module;
the second step is that: the IRIG-B code transceiver module converts the GPS signal into an IRIG-B code signal;
the third step: the core chip records the tick number of the mobile terminal per minute to obtain the average tick number per second and stores the tick number;
the fourth step: checking tick number per second and IRIG-B code signal per second, and checking time by checking tick number of crystal oscillator of the mobile terminal per second;
the fifth step: when the signal receiving of the Beidou or GPS receiver is interrupted, the IRIG-B code transceiver module does not receive the GPS signal, and the mobile terminal corresponds to the integer of the average tick number per second calculated by the core chip per second.
2. The method according to claim 1, wherein the mobile terminal comprises a wireless network controller, the signal of the wireless network controller is obtained through a wireless communication base station, the loopback time of the signal obtained by the wireless network controller from the base station is a time difference, and the GPS standard time of the base station is calibrated with the time obtained by the GPS receiver of the mobile terminal through the time difference.
3. The Beidou or GPS based high precision self-calibration clock synchronization method according to claim 1, characterized in that when tick number per second and IRIG-B code signal per second are calibrated, data processing time of a core chip is removed.
4. The Beidou or GPS based high precision self-calibration clock synchronization method according to claim 3, characterized in that the data processing time of the core chip is the calculation time of the chip processing system.
5. The Beidou or GPS-based high-precision self-calibration clock synchronization method according to claim 1, wherein the mobile terminal, the Beidou or GPS receiver, the IRIG-B code transceiver module, the core chip and the wireless network controller are all arranged in the same device.
6. The Beidou or GPS based high precision self-calibration clock synchronization method according to claim 1, characterized in that the IRIG-B code adopts an AC code data modulation form.
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