CN113960919A - GNSS time service precision test system and method - Google Patents
GNSS time service precision test system and method Download PDFInfo
- Publication number
- CN113960919A CN113960919A CN202111205725.0A CN202111205725A CN113960919A CN 113960919 A CN113960919 A CN 113960919A CN 202111205725 A CN202111205725 A CN 202111205725A CN 113960919 A CN113960919 A CN 113960919A
- Authority
- CN
- China
- Prior art keywords
- gnss
- signal
- time
- clock
- test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
- G04F5/14—Apparatus for producing preselected time intervals for use as timing standards using atomic clocks
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electric Clocks (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The invention discloses a GNSS time service precision test system and a GNSS time service precision test method. The system comprises: the clock correction device comprises a control device, a clock correction detection device, a GNSS signal generating device and a GNSS signal receiving device; the GNSS signal generating device is used for synchronously transmitting a GNSS simulation signal to the GNSS signal receiving device and transmitting a GNSS reference time pulse signal to the clock error detecting device; the GNSS signal receiving device is used for receiving the GNSS simulation signals, resolving clock information of the GNSS simulation signals and then giving time, and is also used for generating GNSS test time pulse signals after time giving and sending the GNSS test time pulse signals to the clock error detection device; the clock difference detection device is used for detecting clock difference information between the GNSS reference time pulse signal and the GNSS test time pulse signal and sending the clock difference information to the control device; the control device is used for receiving the clock difference information of the preset times and generating a time service precision statistical result according to the clock difference information of the preset times, so that automatic long-term time service precision and time service performance testing can be realized.
Description
Technical Field
The invention relates to the technical field of electronic equipment testing, in particular to a GNSS time service precision testing system and a GNSS time service precision testing method.
Background
From a telecommunication network to an energy grid and financial services, most key infrastructure needs to rely on accurate time signals (GNSS) broadcasted by Global Navigation Satellite Systems (GNSS) such as GPS, GLONASS, Galileo and beidou, namely GNSS time service. Global navigation satellite systems generally refer to all satellite navigation systems, including global, regional, and enhanced. According to the U.S. department of homeland security, these industries are of critical importance for "assets, systems and networks," which can cause significant losses to the country when they are disabled or disturbed. "receivers used by these industries in acquiring precise time must be robust and capable of achieving the desired performance.
With the large-area laying of 5G and the low-delay characteristic requirement of 5G technology, high-precision time service gradually moves to the mass market from the application of the power grid and other small people. However, the method for testing the high-precision time service performance of different GNSS receivers is generally lacking in the industry, and the actual time service precision and the time service performance of the GNSS receivers cannot be systematically evaluated. And manual testing can only test data for several seconds and cannot realize long-term stability testing, a large amount of resources are wasted, measurement errors may occur in manual testing, and the accuracy of the test data cannot be guaranteed.
Disclosure of Invention
In view of the above, an object of the embodiments of the present invention is to provide a GNSS time service precision testing system and method, so as to solve the problem that the existing manual testing has poor accuracy and cannot perform long-term automatic testing on time service precision and time service performance.
In order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides a GNSS time service precision testing system, where the GNSS time service precision testing system includes: the clock correction device comprises a control device, a clock correction detection device, a GNSS signal generating device and a GNSS signal receiving device;
the control device is in communication connection with the clock error detection device and the GNSS signal generating device, the clock error detection device is electrically connected with the GNSS signal generating device and the GNSS signal receiving device, and the GNSS signal generating device is connected with the GNSS signal receiving device;
the GNSS signal generating device is used for synchronously transmitting a GNSS simulation signal to the GNSS signal receiving device and transmitting a GNSS reference time pulse signal to the clock error detecting device;
the GNSS signal receiving device is used for receiving the GNSS simulation signals, resolving clock information of the GNSS simulation signals and then carrying out time service, and is also used for generating GNSS test time pulse signals after time service and sending the GNSS test time pulse signals to the clock difference detection device;
the clock difference detection device is used for detecting clock difference information between the GNSS reference time pulse signal and the GNSS test time pulse signal and sending the clock difference information to the control device;
the control device is used for receiving the clock difference information of preset times and generating a time service precision statistical result according to the clock difference information of the preset times.
In addition, the clock difference detecting apparatus includes: the device comprises a signal detection unit, a time recording unit and a comparison unit;
the signal detection unit is used for determining that the GNSS reference time pulse signal is detected when the voltage signal of the signal receiving end of the GNSS signal generation device is detected to be larger than a threshold value; and is used for determining that the GNSS test time pulse signal is detected when the voltage signal of the signal receiving end of the GNSS signal receiving apparatus is detected to be greater than the threshold value;
the time recording unit is connected with the signal detection unit and is used for recording the receiving time of the GNSS reference time pulse signal and the GNSS test time pulse signal;
and the comparison unit is connected with the time recording unit and is used for calculating the clock difference between the receiving time of the GNSS reference time pulse signal and the receiving time of the GNSS test time pulse signal and generating the clock difference information.
In addition, the clock difference detection device adopts an oscilloscope supporting IO communication; the oscilloscope comprises the signal detection unit, a time recording unit and a comparison unit.
In addition, the control device is also used for carrying out test configuration on the oscilloscope.
In addition, the control device is also used for configuring a test scene of the GNSS signal generating device; the test scenario includes the signal source type and the signal source number of the GNSS signal generation apparatus.
In addition, the time service precision statistical result comprises: a time service precision percentage and/or a time service precision scatter diagram.
In addition, the GNSS signal generating apparatus and the GNSS signal receiving apparatus are connected by a radio frequency cable.
In addition, the GNSS reference time pulse signal and the GNSS test time pulse signal are pulse per second signals each having a pulse per second.
In addition, the time precision of the output signal of the GNSS signal generating device is less than 2 nanoseconds.
In a second aspect, an embodiment of the present invention further provides a GNSS timing precision testing method, which is applied to the testing system described above; the system comprises: the clock correction device comprises a control device, a clock correction detection device, a GNSS signal generating device and a GNSS signal receiving device; the control device is in communication connection with the clock error detection device and the GNSS signal generating device, the clock error detection device is electrically connected with the GNSS signal generating device and the GNSS signal receiving device, and the GNSS signal generating device is connected with the GNSS signal receiving device; the method comprises the following steps:
the GNSS signal generating device synchronously transmits GNSS simulation signals to the GNSS signal receiving device and transmits GNSS reference time pulse signals to the clock error detecting device;
the GNSS signal receiving device receives the GNSS analog signal, resolves clock information of the GNSS analog signal, gives time, generates a GNSS test time pulse signal after time giving, and sends the GNSS test time pulse signal to the clock difference detection device;
the clock difference detection device detects clock difference information between the GNSS reference time pulse signal and the GNSS test time pulse signal and sends the clock difference information to the control device;
and the control device receives the clock difference information of preset times and generates a time service precision statistical result according to the clock difference information of the preset times.
The embodiment of the invention synchronously transmits a GNSS simulation analog signal to a GNSS signal receiving device and transmits a GNSS reference time pulse signal to a clock difference detection device through a GNSS signal generating device, receives the GNSS simulation analog signal through the GNSS signal receiving device and calculates to obtain clock information of the GNSS simulation analog signal to give time, generates a GNSS test time pulse signal after the time is given, transmits the GNSS test time pulse signal to the clock difference detection device, detects clock difference information between the GNSS reference time pulse signal and the GNSS test time pulse signal through the clock difference detection device and transmits the clock difference information to a control device, the control device receives the clock difference information for preset times and generates a time-giving precision statistical result according to the clock difference information for the preset times, thereby realizing the automatic test of the long-term stability of the time-giving precision and the time-giving performance of the GNSS receiver, and improving the test accuracy and the test efficiency compared with the manual test, and test resources can be saved.
Drawings
Fig. 1 is a schematic structural diagram of a GNSS time service precision testing system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a clock error detection apparatus of a GNSS time service precision testing system according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a GNSS time service precision testing method according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through embodiments with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a GNSS time service precision testing system according to an embodiment of the present invention, which is used for performing an automated test on time service precision and time service performance, and is particularly suitable for a pressure test. As shown in fig. 1, the test system includes: the control device 10, the clock difference detection device 20, the GNSS signal generation device 30, and the GNSS signal reception device 40.
The control device 10 is communicatively connected to the clock difference detection device 20 and the GNSS signal generation device 30. The clock difference detecting device 20 is electrically connected to the GNSS signal generating device 30 and the GNSS signal receiving device 40. The GNSS signal generating device is connected with the GNSS signal receiving device. Preferably, the GNSS signal generating device and the GNSS signal receiving device may be connected by a radio frequency cable, and the signal transmission accuracy is high by the radio frequency cable. It is understood that, without being limited in particular, a wireless connection may be used between the GNSS signal generating apparatus and the GNSS signal receiving apparatus under the condition that the reliability of the air transmission environment is guaranteed.
The GNSS signal generating apparatus 30 is configured to synchronously transmit a GNSS simulation signal to the GNSS signal receiving apparatus and transmit a GNSS reference time pulse signal to the clock error detecting apparatus. Specifically, the GNSS signal generating device 30 is configured to provide a high-precision GNSS pseudo-analog signal for the GNSS signal receiving device to perform timing, and provide a high-precision GNSS reference time pulse signal for the clock error detecting device 20 to perform clock error detection. The GNSS signal generating apparatus 30 may be turned on and off by the control apparatus 10.
The GNSS signal receiving device 40 is configured to receive a GNSS analog signal and resolve clock information of the GNSS analog signal to perform time service, and the GNSS signal receiving device 40 is further configured to generate a GNSS test time pulse signal after the time service, and send the GNSS test time pulse signal to the clock offset detection device 20. The GNSS signal receiving apparatus 40 is the device to be tested for timing accuracy and performance. The GNSS signal receiving apparatus 40 receives the GNSS pseudo-analog signal transmitted by the GNSS signal generating apparatus 30 and then gives a time, that is, the GNSS signal receiving apparatus 40 calculates clock difference information with the GNSS signal generating apparatus 30 and then corrects its own local clock, synchronizes it with the high-precision clock of the GNSS signal generating apparatus 30 to the same time, generates a GNSS test time pulse signal at the same time, and transmits the GNSS test time pulse signal to the clock difference detecting apparatus 20.
The clock difference detecting device 20 is configured to detect clock difference information between the GNSS reference time pulse signal and the GNSS test time pulse signal, and transmit the clock difference information to the control device 10. The clock difference information is the time difference of the GNSS reference time pulse signal GNSS test time pulse signal detected by the clock difference detecting means 20. The opening and closing of the clock difference detection means 20 may be controlled by the control means 10.
The control device 10 is configured to receive clock difference information of preset times, and generate a timing accuracy statistical result according to the clock difference information of the preset times. That is, the control device 10 continuously receives the clock difference information sent by the clock difference detection device 20 within a certain test duration, the clock difference information may be generated according to a certain frequency, and when the number of times of receiving the clock difference information reaches a preset number, the control device 10 generates a timing accuracy statistical result according to the received clock difference information of the preset number.
Therefore, the GNSS time service precision testing system disclosed in the exemplary embodiment can automatically test the time service precision and time service performance of the device to be tested for a long time.
In this embodiment, the GNSS reference time pulse signal and the GNSS test time pulse signal are each a pulse per second signal. That is, the GNSS signal generating apparatus 30 generates a GNSS reference time pulse signal and a GNSS pseudo analog signal every second to the GNSS signal receiving apparatus 40 correspondingly generates a GNSS test time pulse signal every second. For example, the time precision of the output signal of the GNSS signal generating apparatus 30 is less than 2 nanoseconds, and the GNSS signal generating apparatus 30 may adopt a GSS7000 high performance signal generator, which is not particularly limited herein.
Referring to fig. 2, the clock skew detecting apparatus 20 may include: a signal detection unit 201, a time recording unit 202, a comparison unit 203, and an IO transmission unit 204.
The signal detecting unit 201 is configured to determine that the GNSS reference time pulse signal is detected when the voltage signal of the signal receiving end of the GNSS signal generating apparatus is detected to be greater than the threshold value, and to determine that the GNSS test time pulse signal is detected when the voltage signal of the signal receiving end of the GNSS signal receiving apparatus is detected to be greater than the threshold value. The signal detection unit 201 comprises a signal receiving end of a GNSS reference time pulse signal and a signal receiving end of a GNSS test time pulse signal, and when the signal detection unit 201 detects that the signal receiving end of the GNSS reference time pulse signal has a pulse signal with a voltage greater than a threshold value, the threshold value is 1.0V or 1.2V, that is, the GNSS reference time pulse signal is received; when the signal detection unit 201 detects that a pulse signal with a voltage greater than a threshold exists at a signal receiving end of the GNSS test time pulse signal, the threshold is, for example, 1.0V or 1.2V, that is, the GNSS test time pulse signal is received.
The time recording unit 202 is connected to the signal detecting unit 201 and is configured to record the receiving time of the GNSS reference time pulse signal and the GNSS test time pulse signal. The time recording unit 202 may adopt a high-precision time unit to record the precise time when the GNSS reference time pulse signal and the GNSS test time pulse signal are received, respectively.
The comparing unit 203 is connected to the time recording unit 202, and is configured to calculate a clock difference between the receiving time of the GNSS reference time pulse signal and the receiving time of the GNSS test time pulse signal and generate clock difference information. The clock difference information is a difference between the reception time of the GNSS test time pulse signal and the reception time of the GNSS reference time pulse signal.
The IO transmission unit 204 is configured to communicate with the control device 10 to transmit clock difference information to the control device 10 or receive test configuration information sent by the control device 10.
In one example, the clock difference detecting apparatus 20 may employ an oscilloscope supporting IO communication. The oscilloscope may include a signal detection unit 201, a time recording unit 202, a comparison unit 203, and the like, and an IO port thereof is an IO transmission unit, so that clock skew detection may be implemented by an existing device without additionally manufacturing a clock skew detection device.
The control device 10 may be a computing device such as a PC, a notebook computer, or a mobile phone. The control device 10 can be used to configure a test environment, test information, and the like for a device that needs to be configured in the system.
Specifically, the control device 10 may be used for performing test configuration on the oscilloscope, and for performing configuration on a test scenario of the GNSS signal generation device 30.
The configuration information of the test scenario may include the signal source type and the signal source number of the GNSS signal generating apparatus 30. For example, the signal source of the GNSS signal generating apparatus 30 may be a multi-satellite or a single system. The signal source may be one or more of GPS (Global Positioning System), GLONASS (GLONASS), Galileo (Galileo), and beidou, for example. GLONASS is an abbreviation for the russian "GLOBAL NAVIGATION satellite system SATELLITE SYSTEM". Galileo number is a global satellite navigation system independent of GPS and GLONASS. The number of signal sources may be 3 or 4 to enable stable positioning of the position of the GNSS signal receiving apparatus 40. The control device 10 may configure the GNSS signal generating device 30 through Socket (a kind of network interface) instructions.
The control device 10 can control the time service precision test system to continuously perform the time service test of the prediction times within a certain test time length. The preset number may be, for example, once per second, and all the time service times (i.e., 86400 times) with the test duration of 24 hours. It is understood that the test duration and the time service frequency can be adjusted according to actual needs, and are not limited specifically herein.
The statistical result of the timing accuracy generated by the control device 10 may include: and the time service precision percentage refers to the percentage of the total time service times within 1-2 ns of the time service precision in the test duration (such as 24 hours) and the total time service times within 24 hours. Thus, time service precision parameters such as CEP-50/CEP68/CEP95/CEP100 can be obtained. Wherein CEP50 represents the percentage of the number of times of time transfer with time transfer accuracy within 1-2 ns as 50%, and CEP100 represents the percentage of the number of times of time transfer with time transfer accuracy within 1-2 ns as 100%. The integral time service precision and time service performance of the receiver can be tested through the time service precision percentage.
Further, the statistical result of the timing accuracy generated by the control device 10 may further include: time service precision scatter plot. The time service precision scatter diagram is a time service precision display diagram with time as an abscissa axis and time service precision as an ordinate axis, so that the characteristic that the time service precision changes along with time is convenient to observe.
The embodiment of the invention synchronously transmits a GNSS simulation analog signal to a GNSS signal receiving device and transmits a GNSS reference time pulse signal to a clock difference detection device through a GNSS signal generating device, receives the GNSS simulation analog signal through the GNSS signal receiving device and calculates to obtain clock information of the GNSS simulation analog signal to give time, generates a GNSS test time pulse signal after the time is given, transmits the GNSS test time pulse signal to the clock difference detection device, detects clock difference information between the GNSS reference time pulse signal and the GNSS test time pulse signal through the clock difference detection device and transmits the clock difference information to a control device, the control device receives the clock difference information for preset times and generates a time-giving precision statistical result according to the clock difference information for the preset times, thereby realizing the automatic test of the long-term stability of the time-giving precision and the time-giving performance of the GNSS receiver, and improving the test accuracy and the test efficiency compared with the manual test, and test resources can be saved.
Fig. 3 is a flowchart illustrating a GNSS time service precision testing method according to the second embodiment, which can be applied to the testing system according to the first embodiment. With continued reference to fig. 1 and fig. 2, the system includes: the control device 10, the clock difference detection device 20, the GNSS signal generation device 30, and the GNSS signal reception device 40. The control device 10 is communicatively connected to the clock difference detection device 20 and the GNSS signal generation device 30, the clock difference detection device 20 is electrically connected to the GNSS signal generation device 30 and the GNSS signal reception device 40, and the GNSS signal generation device 30 is connected to the GNSS signal reception device 40. Illustratively, the GNSS signal generating apparatus 30 and the GNSS signal receiving apparatus 40 may be connected to each other by a radio frequency cable. As shown in fig. 3, the GNSS timing accuracy testing method of the present embodiment includes steps 301 to 304:
step 301: the GNSS signal generating device synchronously transmits a GNSS simulation signal to the GNSS signal receiving device and transmits a GNSS reference time pulse signal to the clock error detecting device.
Optionally, the time accuracy of the output signal of the GNSS signal generating apparatus is less than 2 nanoseconds.
The test scenario of the GNSS signal generating apparatus may be configured by the control apparatus. The test scenario may include the signal source type and the signal source number of the GNSS signal generating apparatus.
Step 302: the GNSS signal receiving device receives the GNSS analog signal, resolves clock information of the GNSS analog signal, gives time, generates a GNSS test time pulse signal after time giving, and sends the GNSS test time pulse signal to the clock error detection device.
Alternatively, the accuracy of the time signal output by the GNSS signal receiving apparatus may be less than or equal to 2 nanoseconds and greater than or equal to 1 nanosecond.
Step 303: the clock difference detection device detects clock difference information between the GNSS reference time pulse signal and the GNSS test time pulse signal, and sends the clock difference information to the control device.
Alternatively, the clock difference detecting device may determine that the GNSS reference time pulse signal is detected when the voltage signal at the signal receiving end of the GNSS signal generating device is detected to be greater than the threshold value, and may determine that the GNSS test time pulse signal is detected when the voltage signal at the signal receiving end of the GNSS signal receiving device is detected to be greater than the threshold value. The clock difference detection device can also record the receiving time of the GNSS reference time pulse signal and the GNSS test time pulse signal and calculate the clock difference between the receiving time of the GNSS reference time pulse signal and the receiving time of the GNSS test time pulse signal to generate the clock difference information.
Alternatively, the clock difference detection apparatus may employ an oscilloscope supporting IO communication.
The control device can perform test configuration on the oscilloscope, such as configuring the test times, the threshold size of the voltage signal and the like.
The control device may turn on the clock error detection device after turning on the GNSS signal generation device and the GNSS signal reception device and waiting for the GNSS signal reception device to be stably positioned under the GNSS signal generation device.
Step 304: the control device receives the clock difference information of the preset times and generates a time service precision statistical result according to the clock difference information of the preset times.
Optionally, the timing accuracy statistic result may include: percentage of time service accuracy. The time service precision percentage refers to the percentage of the total time service times within 1-2 ns and the total time service times within 24 hours of the time service precision within the test time length (such as 24 hours).
Further, the time service precision statistical result may further include: time service precision scatter plot. The time service precision scatter diagram is a time service precision display diagram with time as an abscissa axis and time service precision as an ordinate axis, so that the characteristic that the time service precision changes along with time is convenient to observe.
The method of the embodiment of the invention synchronously transmits a GNSS simulation analog signal to a GNSS signal receiving device through a GNSS signal generating device and transmits a GNSS reference time pulse signal to a clock difference detecting device, receives the GNSS simulation analog signal through the GNSS signal receiving device and calculates to obtain clock information of the GNSS simulation analog signal to give time, generates a GNSS test time pulse signal after the time is given and transmits the GNSS test time pulse signal to the clock difference detecting device, detects the clock difference information between the GNSS reference time pulse signal and the GNSS test time pulse signal through the clock difference detecting device and transmits the clock difference information to a control device, the control device receives the clock difference information of preset times and generates a time-giving precision statistical result according to the clock difference information of the preset times, thereby realizing the automatic test of the long-term stability of the time-giving precision and the time-giving performance of the GNSS receiver, and improving the test accuracy and the test efficiency compared with the manual test, and test resources can be saved.
That is, those skilled in the art can understand that all or part of the steps in the method according to the above embodiments may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, etc.) or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A GNSS time service precision test system is characterized by comprising: the clock correction device comprises a control device, a clock correction detection device, a GNSS signal generating device and a GNSS signal receiving device;
the control device is in communication connection with the clock error detection device and the GNSS signal generating device, the clock error detection device is electrically connected with the GNSS signal generating device and the GNSS signal receiving device, and the GNSS signal generating device is connected with the GNSS signal receiving device;
the GNSS signal generating device is used for synchronously transmitting a GNSS simulation signal to the GNSS signal receiving device and transmitting a GNSS reference time pulse signal to the clock error detecting device;
the GNSS signal receiving device is used for receiving the GNSS simulation signals, resolving clock information of the GNSS simulation signals and then carrying out time service, and is also used for generating GNSS test time pulse signals after time service and sending the GNSS test time pulse signals to the clock difference detection device;
the clock difference detection device is used for detecting clock difference information between the GNSS reference time pulse signal and the GNSS test time pulse signal and sending the clock difference information to the control device;
the control device is used for receiving the clock difference information of preset times and generating a time service precision statistical result according to the clock difference information of the preset times.
2. The GNSS time service precision test system according to claim 1, wherein the clock error detection device comprises: the device comprises a signal detection unit, a time recording unit and a comparison unit;
the signal detection unit is used for determining that the GNSS reference time pulse signal is detected when the voltage signal of the signal receiving end of the GNSS signal generation device is detected to be larger than a threshold value; and is used for determining that the GNSS test time pulse signal is detected when the voltage signal of the signal receiving end of the GNSS signal receiving apparatus is detected to be greater than the threshold value;
the time recording unit is connected with the signal detection unit and is used for recording the receiving time of the GNSS reference time pulse signal and the GNSS test time pulse signal;
and the comparison unit is connected with the time recording unit and is used for calculating the clock difference between the receiving time of the GNSS reference time pulse signal and the receiving time of the GNSS test time pulse signal and generating the clock difference information.
3. The GNSS time service precision test system of claim 2, wherein the clock error detection device employs an oscilloscope supporting IO communication; the oscilloscope comprises the signal detection unit, a time recording unit and a comparison unit.
4. The GNSS time service precision test system of claim 3, wherein the control device is further configured to perform a test configuration on the oscilloscope.
5. The GNSS time service precision test system according to claim 1, wherein the control device is further configured to configure a test scenario of the GNSS signal generating device; the test scenario includes the signal source type and the signal source number of the GNSS signal generation apparatus.
6. The GNSS time service precision test system of claim 1, wherein the time service precision statistics result comprises: a time service precision percentage and/or a time service precision scatter diagram.
7. The GNSS time service precision test system of claim 1, wherein the GNSS signal generating device and the GNSS signal receiving device are connected via a radio frequency cable.
8. The GNSS time service precision test system of claim 1, wherein the GNSS reference time pulse signal and the GNSS test time pulse signal are pulse per second signals.
9. The GNSS time service precision test system of claim 1, wherein the time precision of the output signal of the GNSS signal generating device is less than 2 nanoseconds.
10. A GNSS time service precision test method, which is applied to the test system according to any one of claims 1 to 9; the system comprises: the clock correction device comprises a control device, a clock correction detection device, a GNSS signal generating device and a GNSS signal receiving device; the control device is in communication connection with the clock error detection device and the GNSS signal generating device, the clock error detection device is electrically connected with the GNSS signal generating device and the GNSS signal receiving device, and the GNSS signal generating device is connected with the GNSS signal receiving device; the method comprises the following steps:
the GNSS signal generating device synchronously transmits GNSS simulation signals to the GNSS signal receiving device and transmits GNSS reference time pulse signals to the clock error detecting device;
the GNSS signal receiving device receives the GNSS analog signal, resolves clock information of the GNSS analog signal, gives time, generates a GNSS test time pulse signal after time giving, and sends the GNSS test time pulse signal to the clock difference detection device;
the clock difference detection device detects clock difference information between the GNSS reference time pulse signal and the GNSS test time pulse signal and sends the clock difference information to the control device;
and the control device receives the clock difference information of preset times and generates a time service precision statistical result according to the clock difference information of the preset times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111205725.0A CN113960919A (en) | 2021-10-15 | 2021-10-15 | GNSS time service precision test system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111205725.0A CN113960919A (en) | 2021-10-15 | 2021-10-15 | GNSS time service precision test system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113960919A true CN113960919A (en) | 2022-01-21 |
Family
ID=79464173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111205725.0A Withdrawn CN113960919A (en) | 2021-10-15 | 2021-10-15 | GNSS time service precision test system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113960919A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014089988A1 (en) * | 2012-12-14 | 2014-06-19 | 北京东方联星科技有限公司 | High-sensitivity beidou auxiliary timing device, timing receiver and timing method |
| CN104570012A (en) * | 2014-12-29 | 2015-04-29 | 北京无线电计量测试研究所 | System and method for time delay calibration of Beidou navigation signal hardware simulator |
| CN105785402A (en) * | 2014-12-26 | 2016-07-20 | 北京无线电计量测试研究所 | GNSS signal simulator time delay calibration system and GNSS signal simulator time delay calibration method |
| CN110554364A (en) * | 2019-08-30 | 2019-12-10 | 中国空间技术研究院 | system and method for testing radar signal pulse arrival time measurement accuracy |
| CN111239775A (en) * | 2020-03-10 | 2020-06-05 | 武汉大学 | Clock error compensation-based hardware delay calibration method and system for time service receiver |
-
2021
- 2021-10-15 CN CN202111205725.0A patent/CN113960919A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014089988A1 (en) * | 2012-12-14 | 2014-06-19 | 北京东方联星科技有限公司 | High-sensitivity beidou auxiliary timing device, timing receiver and timing method |
| CN105785402A (en) * | 2014-12-26 | 2016-07-20 | 北京无线电计量测试研究所 | GNSS signal simulator time delay calibration system and GNSS signal simulator time delay calibration method |
| CN104570012A (en) * | 2014-12-29 | 2015-04-29 | 北京无线电计量测试研究所 | System and method for time delay calibration of Beidou navigation signal hardware simulator |
| CN110554364A (en) * | 2019-08-30 | 2019-12-10 | 中国空间技术研究院 | system and method for testing radar signal pulse arrival time measurement accuracy |
| CN111239775A (en) * | 2020-03-10 | 2020-06-05 | 武汉大学 | Clock error compensation-based hardware delay calibration method and system for time service receiver |
Non-Patent Citations (2)
| Title |
|---|
| 刘浩等: "北斗高精度授时终端测试技术研究", 《中国检验检测》 * |
| 向为等: "基于锁相环的GNSS授时接收机钟差校准算法", 《国防科技大学学报》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8032301B2 (en) | Computing long term orbit and clock models with variable time-horizons | |
| RU2328016C2 (en) | Process and device for checking location devices using auxiliary data | |
| US7236126B2 (en) | AGPS system using NTP server and method for determining the location of a terminal using a NTP server | |
| US7405696B2 (en) | Method for calibrating and AOA location system for frequency hopping air interfaces | |
| US7379019B2 (en) | Method for angle of arrival determination on frequency hopping air interfaces | |
| US20130141278A1 (en) | Navigation Data Structure Generation And Data Transmission For Optimal Time To First Fix | |
| BR112013017960A2 (en) | method and system for determining satellite clock corrections | |
| CN112543078B (en) | Network time server calibration method and device based on satellite common view | |
| US20180217265A1 (en) | Devices, Systems and Methods for Digitally Transporting Signals in GNSS Repeater Systems Using CPRI | |
| JP5112873B2 (en) | Method and system for positioning signal acquisition support window evaluation | |
| CN115379382A (en) | Information reporting method, device, equipment and readable storage medium | |
| CN113840321A (en) | Information indication method, device and communication equipment | |
| CN113960919A (en) | GNSS time service precision test system and method | |
| CN109634093B (en) | GNSS receiver-based time service method and GNSS receiver | |
| CN116033339A (en) | Information reporting method, device, equipment and readable storage medium | |
| Diouf et al. | Demonstration of a decimeter-level accurate hybrid optical-wireless terrestrial positioning system | |
| US20220303939A1 (en) | Systems and Methods for Location Determination of Base Station Facilities and Mobile User Equipment (UE) Devices in a Wireless Communication Network | |
| CN114637033A (en) | Beidou-based remote real-time calibration method | |
| US20180324616A1 (en) | Generating location data while conserving resources | |
| CN109525346B (en) | Method and device for realizing time synchronization | |
| US20210072707A1 (en) | Time synchronization system, management device, time synchronization method, and program | |
| CN112817011A (en) | Navigation method for mobile object based on GPS tracking | |
| CN113691338B (en) | Offline time service device, method, computer program product and electronic equipment | |
| Bielawa | Position location of remote bluetooth devices | |
| CN111971938A (en) | Adaptive detection function for statistical propagation channel estimation based on GNSS receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220121 |
|
| WW01 | Invention patent application withdrawn after publication |