Test system, method and equipment for low-frequency time code analog source broadcast control precision calibration
By designing a test system for low-frequency time code simulation sources, using standard time sources and oscilloscopes for precision time measurements, the problem of inaccurate low-frequency time code calibration is solved, and high-precision transmission control performance evaluation is achieved.
Patent Information
- Application Number
- CN202411967083.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-05-27
AI Technical Summary
The lack of accurate calibration research on low-frequency time codes in the prior art makes it difficult to guarantee its accuracy.
A test system is designed, including BPC analog source, standard time source, oscilloscope and standard software, and provides standard time signals and standard clock signals through standard time sources. The oscilloscope receives and displays timing signals, standard time signals and standard clock signals. The standard software configures oscilloscope parameters, controls communication connections, and calculates the transmission and broadcast control accuracy.
It realizes high-precision time measurement at the sub-microsecond level, improves the accuracy of BPC simulation source broadcast control performance evaluation, reduces human intervention, improves work efficiency, and ensures the reliability of measurement results.
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Figure CN120049993A_ABST
Abstract
Description
Technical Field
[0001] This document relates to the technical field of communication computing accuracy calibration, and particularly to a test system, method, and device for calibrating the transmission control accuracy of a low-frequency time code simulation source. Background Art
[0002] Low-frequency time code time service is a civilian time service method recommended by the International Telecommunication Union. The low-frequency time code time service station in China is located in Shangqiu, Henan, with the call sign BPC. The low-frequency time code (BPC) simulation source is a device that generates low-frequency time code signals and occupies an important position in the application of BPC timing receivers. The functions of the BPC signal simulation source are mainly as follows: as a signal source, it provides simulated excitation signals for the development, debugging, and testing of BPC timing receivers; it is used for the time delay calibration of BPC timing receivers; it is used to regularly inspect and test the working status and performance indicators of BPC timing receivers. Therefore, the accuracy of low-frequency time code is very important. However, there is currently no precise research on the calibration of low-frequency time code.
[0003] Therefore, a test system for calibrating the transmission control accuracy of a low-frequency time code simulation source is proposed. Summary of the Invention
[0004] This specification provides a test system, method, and device for calibrating the transmission control accuracy of a low-frequency time code simulation source to solve the problem that there is currently no precise research on the calibration of low-frequency time code. The test system:
[0005] A BPC simulation source for sending a time service signal to an oscilloscope;
[0006] A standard time source for providing a standard time signal and a standard clock signal to the oscilloscope;
[0007] An oscilloscope for receiving the time service signal, the standard time signal, and the standard clock signal under the control of standard software, and for performing waveform display based on the time service signal, the standard time signal, and the standard clock signal under the control of standard software;
[0008] Standard software for configuring the parameters of the oscilloscope, controlling the communication connections between the oscilloscope, the BPC simulation source, and the standard time source, and the waveform display of the oscilloscope, and for calculating the transmission control accuracy between the time service signal and the standard time signal.
[0009] In a preferred embodiment, the standard clock signal provided by the standard software to the oscilloscope is used to provide a common time and frequency reference point for the test system.
[0010] In a preferred embodiment, the time delay for the BPC simulation source to send a time service signal to the oscilloscope is 0.
[0011] In a preferred embodiment, the moment when the BPC simulation source sends a timing signal to the oscilloscope is the same as the moment when the standard clock signal sends a 1PPS signal.
[0012] In a preferred embodiment, the oscilloscope parameters include the sampling rate and trigger condition of the oscilloscope.
[0013] In a preferred embodiment, the calibration software includes a control module and an algorithm module;
[0014] The control module is used to configure the oscilloscope parameters, control the communication connections between the oscilloscope, the BPC simulation source, and the standard time source, and control the waveform display of the oscilloscope;
[0015] The algorithm module is used to calculate the transmission control accuracy between the timing signal and the standard time signal, and store and access the timing signal, the standard time signal, and the standard clock signal.
[0016] In a preferred embodiment, calculating the transmission control accuracy between the timing signal and the standard time signal specifically includes:
[0017] Locating the time point when the carrier amplitude of the timing signal sent by BPC drops to 90% of the original amplitude as the first time point, and the time point at 50% amplitude of the rising edge of the 1PPS pulse as the second time point;
[0018] Calculating the time difference between the first time point and the second time point is the transmission control accuracy.
[0019] The second aspect of the present invention provides a test method for calibrating the transmission control accuracy of a low-frequency time code simulation source, which works based on the above-mentioned test system for calibrating the transmission control accuracy of a low-frequency time code simulation source. The method includes:
[0020] The BPC simulation source sends a timing signal to the oscilloscope;
[0021] The standard time source provides a standard time signal and a standard clock signal to the oscilloscope;
[0022] The standard software configures the oscilloscope parameters, and then controls the oscilloscope to receive the timing signal, the standard time signal, and the standard clock signal;
[0023] The standard software controls the waveform display of the oscilloscope based on the timing signal, the standard time signal, and the standard clock signal obtained by the oscilloscope, and calculates the transmission control accuracy between the timing signal and the standard time signal.
[0024] A third aspect of the present invention provides an electronic device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the processor, and the instructions are used to be executed by the processor to implement the above-mentioned test method for calibrating the broadcast control accuracy of a low-frequency time code analog source.
[0025] A fourth aspect of the present invention provides a computer-readable storage medium storing computer instructions for being executed by a computer to implement the above-mentioned test method for calibrating the broadcast control accuracy of a low-frequency time code analog source.
[0026] The above-mentioned at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:
[0027] By introducing a highly stable standard time source, combining with a precision oscilloscope and intelligent calibration software, this application can achieve high-precision time measurement at the sub-microsecond level, greatly improving the accuracy of evaluating the broadcast control performance of the BPC analog source. Then, it ensures that all devices participating in the test operate based on the same time reference, eliminating potential errors caused by asynchronous issues and making the measurement results more consistent and reliable. Using the calibration software not only reduces the possibility of human intervention but also speeds up the entire measurement process and improves work efficiency. The calculated broadcast control accuracy is accurate and reliable; this method is not only applicable to the initial debugging and performance testing of BPC timing receivers but also plays an important role in subsequent product maintenance and technology upgrades, helping engineers quickly identify problems and take corresponding measures for improvement. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:
[0029] Figure 1 is a schematic diagram of a test system for calibrating the broadcast control accuracy of a low-frequency time code analog source provided by an embodiment of this specification;
[0030] Figure 2 is a schematic diagram of a standard software provided by an embodiment of this specification. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0031] To make the objectives, technical solutions, and advantages of this application more clear, the following will clearly and completely describe the technical solutions of this application in combination with specific embodiments of this application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.
[0032] The following will, in combination with the drawings, elaborate on the technical solutions provided by each embodiment of this application.
[0033] Figure 1 A test system for calibrating the transmission control accuracy of a low-frequency time code analog source provided in an embodiment of this specification is shown in Figure 1 , and the system may specifically include:
[0034] A BPC analog source for sending a time service signal to an oscilloscope;
[0035] A standard time source for providing a standard time signal and a standard clock signal to the oscilloscope;
[0036] An oscilloscope for receiving the time service signal, the standard time signal, and the standard clock signal under the control of standard software, and for performing waveform display based on the time service signal, the standard time signal, and the standard clock signal under the control of the standard software.
[0037] Standard software for configuring the parameters of the oscilloscope, controlling the communication connections between the oscilloscope, the BPC analog source, and the standard time source, and the waveform display of the oscilloscope, and for calculating the transmission control accuracy between the time service signal and the standard time signal.
[0038] To specifically illustrate a test system for calibrating the transmission control accuracy of a low-frequency time code analog source provided in an embodiment of the present invention, the following is a specific description:
[0039] A BPC analog source for sending a time service signal to an oscilloscope;
[0040] In this embodiment, the time delay of the BPC analog source sending the time service signal to the oscilloscope is 0.
[0041] A standard time source for providing a standard time signal and a standard clock signal to the oscilloscope;
[0042] In this embodiment, the standard clock signal provided by the standard software to the oscilloscope is used to provide a common time and frequency reference point for the test system.
[0043] In this embodiment, the moment when the BPC analog source sends the time service signal to the oscilloscope is the same moment as the moment when the standard clock signal sends a 1PPS signal.
[0044] An oscilloscope, configured to receive a time service signal, a standard time signal, and a standard clock signal under the control of standard software, and perform waveform display based on the time service signal, the standard time signal, and the standard clock signal under the control of the standard software;
[0045] In this embodiment, the oscilloscope parameters include the sampling rate and the trigger condition of the oscilloscope.
[0046] Standard software, configured to configure the oscilloscope parameters, control the communication connections between the oscilloscope and a BPC simulation source and a standard time source, control the waveform display of the oscilloscope, and calculate the transmission control accuracy between the time service signal and the standard time signal.
[0047] In this embodiment, as Figure 2 shown, the calibration software includes a control module and an algorithm module;
[0048] The control module is configured to configure the oscilloscope parameters, control the communication connections between the oscilloscope and a BPC simulation source and a standard time source, and control the waveform display of the oscilloscope;
[0049] The algorithm module is configured to calculate the transmission control accuracy between the time service signal and the standard time signal, and store and access the time service signal, the standard time signal, and the standard clock signal.
[0050] In this embodiment, calculating the transmission control accuracy between the time service signal and the standard time signal specifically includes:
[0051] Locating the time point when the carrier amplitude of the time service signal transmitted by BPC drops to 90% of the original amplitude as the first time point, and the time point at 50% amplitude of the rising edge of the 1PPS pulse as the second time point;
[0052] Calculating the time difference between the first time point and the second time point, which is the transmission control accuracy.
[0053] The present invention also provides an example to illustrate a test system for calibrating the transmission control accuracy of a low-frequency time code simulation source. The transmission control accuracy of the BPC simulation source directly affects the time delay calibration and calibration accuracy of the BPC timing receiver. The transmission control accuracy can be obtained by the difference between the amplitude-modulated signal emitted by the BPC simulation source and the starting point position of the standard 1PPS. In view of the transmission control accuracy of the BPC simulation source, the present invention builds a calibration system and compiles calibration software. The calibration system consists of an oscilloscope, a standard time source, and calibration software. The standard time source provides a standard clock signal (10 MHz) to the oscilloscope to ensure the consistency of the clock reference; provides a standard time signal (1PPS) to compare with the timing signal of the BPC simulation source to obtain the transmission control accuracy. The BPC simulation source sets the time delay to 0, broadcasts the timing signal, and captures the start moment of the initial second through the calibration software, that is, the moment when the carrier amplitude drops to 90% of the original amplitude, and calculates the time difference from the 50% amplitude point of the rising edge of the standard time signal, which is the transmission control accuracy.
[0054] The second aspect of the present invention provides a test method for calibrating the transmission control accuracy of a low-frequency time code simulation source, which works based on the above-mentioned test system for calibrating the transmission control accuracy of a low-frequency time code simulation source. The method includes:
[0055] The BPC simulation source sends a timing signal to the oscilloscope;
[0056] The standard time source provides a standard time signal and a standard clock signal to the oscilloscope;
[0057] The standard software configures the parameters of the oscilloscope, and then controls the oscilloscope to receive the timing signal, the standard time signal, and the standard clock signal;
[0058] The standard software controls the waveform display of the oscilloscope based on the timing signal, the standard time signal, and the standard clock signal obtained by the oscilloscope, and calculates the transmission control accuracy between the timing signal and the standard time signal.
[0059] The third aspect of the present invention provides an electronic device, including: at least one processor; and
[0060] a memory communicatively connected to at least one of the processors; wherein, the memory stores instructions executable by the processor, and the instructions are used to be executed by the processor to implement the above-mentioned test method for calibrating the transmission control accuracy of a low-frequency time code simulation source.
[0061] The fourth aspect of the present invention provides a computer-readable storage medium, which stores computer instructions for being executed by a computer to implement the above-mentioned test method for calibrating the transmission control accuracy of a low-frequency time code simulation source.
[0062] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.
Claims
1. A test system for calibrating the control accuracy of low-frequency time code analog source broadcasting, characterized in that: The test system comprises: BPC analog source, used to send timing signals to the oscilloscope; A standard time source, used to provide a standard time signal and a standard clock signal to the oscilloscope; An oscilloscope, used for receiving a timing signal, a standard time signal and a standard clock signal under the control of standard software, and displaying waveforms based on the timing signal, the standard time signal and the standard clock signal under the control of standard software; Standard software, used to configure oscilloscope parameters, control the communication connection between the oscilloscope and BPC analog source, standard time source and the waveform display of the oscilloscope, and calculate the transmission control accuracy between the timing signal and the standard time signal.
2. A test system for calibrating the control accuracy of low-frequency time code simulation source broadcasting according to claim 1, characterized in that: A standard time clock signal provided to the oscilloscope by standard software is used to provide a common time and frequency reference point for the test system.
3. A test system for calibrating the control accuracy of low-frequency time code analog source broadcasting according to claim 2, characterized in that: The time delay of the BPC analog source sending the timing signal to the oscilloscope is 0.
4. A test system for calibrating the control accuracy of low-frequency time code analog source broadcasting according to claim 3, characterized in that: The moment when the BPC analog source sends the timing signal to the oscilloscope is the same as the moment when the standard clock signal sends the 1PPS signal.
5. A test system for calibrating the control accuracy of low-frequency time code analog source broadcasting according to claim 4, characterized in that: The oscilloscope parameters include the sampling rate and trigger conditions of the oscilloscope.
6. A test system for calibrating the control accuracy of low-frequency time code analog source broadcasting according to claim 5, characterized in that: The calibration software includes a control module and an algorithm module; The control module is used to configure oscilloscope parameters, control the communication connection between the oscilloscope and the BPC simulation source and the standard time source, and control the waveform display of the oscilloscope; The algorithm module is used to calculate the transmission control accuracy between the timing signal and the standard time signal, and to store and access the timing signal, the standard time signal and the standard clock signal.
7. A test system for calibrating the control accuracy of low-frequency time code analog source broadcasting according to claim 6, characterized in that: Calculation of the transmission control accuracy between the timing signal and the standard time signal specifically includes: The time point at which the carrier amplitude of the timing signal sent by the positioning BPC drops to 90% of the original amplitude is taken as the first time point, and the time point at which the amplitude of the rising edge of the 1PPS pulse is 50% is taken as the second time point; The time difference between the first time point and the second time point is calculated as the broadcast control accuracy.
8. A test method for calibrating the control accuracy of a low-frequency time code simulation source broadcast, based on the test system for calibrating the control accuracy of a low-frequency time code simulation source broadcast as described in any one of claims 1 to 7, characterized in that: The method comprises: The BPC analog source sends a timing signal to the oscilloscope; The standard time source provides the oscilloscope with a standard time signal and a standard clock signal; The standard software configures the oscilloscope parameters, and then controls the oscilloscope to receive the timing signal, the standard time signal and the standard clock signal; The standard software obtains the timing signal, standard time signal and standard clock signal based on the oscilloscope, controls the waveform display of the oscilloscope based on these signals, and calculates the transmission control accuracy between the timing signal and the standard time signal.
9. An electronic device, characterized in that: include: at least one processor; as well as A memory communicatively connected to at least one of the processors; wherein the memory stores instructions executable by the processor, the instructions being executed by the processor to implement the test method for calibrating the control accuracy of low-frequency time code simulation source broadcasting as described in claim 8.
10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to be executed by the computer to implement the test method for calibrating the control accuracy of low-frequency time code simulation source broadcasting as described in claim 8.