Power consumption control method and control device for self-punctuality combined frequency source

Abstract

The invention relates to the technical field of time frequency, and particularly discloses a power consumption control method and control device for a self-timekeeping combined frequency source, and the core of the control device is mainly composed of a high-precision high-power-consumption frequency source and a low-precision low-power-consumption frequency source. When an external second signal exists, the two frequency sources respectively enter a taming mode, and the frequency and the PPS phase are tamed in the external second; after taming is completed, the external second signals are cut off, the two frequency sources enter a time keeping mode, and intermittent power supply is conducted on the high-precision and high-power-consumption frequency sources; when the high-precision and high-power-consumption frequency source is powered off, the low-precision and low-power-consumption frequency source freely oscillates; when the high-precision and high-power-consumption frequency source supplies power, the high-precision and high-power-consumption frequency source is used as a frequency reference to perform frequency calibration and PPS phase calibration on the low-precision and low-power-consumption frequency source; and the low-precision and low-power-consumption frequency source always performs final frequency output and PPS output. According to the invention, the overall average power consumption of the combined frequency source can be further reduced on the premise of ensuring the final output frequency and time precision by setting proper power-on and power-off duration.

Description

Technical Field

[0001] This application relates to the field of time and frequency technology, and in particular to a power consumption control method and control device for a self-timed combination frequency source. Background Technology

[0002] Frequency sources for engineering applications are generally divided into two main categories: crystal oscillators and atomic clocks. Crystal oscillators can be further subdivided into oven-controlled crystal oscillators, temperature-compensated crystal oscillators, silicon oscillators, etc., while atomic clocks can be subdivided into cesium atomic clocks, hydrogen atomic clocks, rubidium atomic clocks, chip-scale atomic clocks, etc. For example, in underwater and surface operation equipment such as surface monitoring, seabed exploration, marine geophysical exploration, buoys, and unmanned surface vessels, their navigation, positioning, data acquisition, and communication systems all rely on high-precision time and frequency signals. These devices typically incorporate high-precision frequency sources, mainly including oven-controlled crystal oscillators (OCXOs) and chip-scale atomic clocks (CSACs). OCXOs maintain the frequency stability of quartz resonators through a temperature-controlled cavity, offering advantages such as lower cost and mature technology. CSACs, based on the principle of atomic energy level transitions, offer high frequency accuracy, but are more expensive and have limited supply. Both provide a precise time base for the equipment.

[0003] Taking seabed exploration equipment as an example, firstly, before deploying the equipment, the frequency source needs to be tamed using the 1PPS signal from GPS / BDS to achieve initial time synchronization and frequency consistency among the nodes. This process is carried out in a surface environment, using the 1PPS signal from GPS / BDS to calibrate the output frequency and phase of the OCXO or CSAC, ensuring that each node device has a highly consistent time base before entering the water.

[0004] After initial synchronization with the surface environment, the seabed detection equipment will be deployed underwater for extended data acquisition, typically lasting 15 to 90 days. During this period, the frequency source must maintain a suitable and minimal time error throughout the mission. This time error is caused by long-term frequency drift of the frequency source. Whether it's an atomic clock or a crystal oscillator, frequency drift always exists, differing only in magnitude. In the surface environment, because GPS / BDS second signals can be received, the frequency source can be tamed to these signals, thus eliminating frequency drift. However, once the equipment is underwater, it cannot receive GPS / BDS signals, and the frequency source must rely on its own stability to maintain time accuracy. Its frequency drift will directly affect the consistency of the timestamps of the acquired data and the accuracy of subsequent processing.

[0005] Finally, when operating underwater, the equipment typically relies on batteries to provide a limited power supply. The frequency source accounts for a large proportion of the equipment's total power consumption. If the frequency source's power consumption is too high, more batteries must be added to ensure continuous underwater operation. This would increase the size and weight of each node in the detection equipment. The size and weight of the nodes are related to the maximum number of nodes that a ship can store, the deployment and retrieval methods, etc. Therefore, the power consumption of the frequency source must be as low as possible while ensuring that its time error indicators are usable.

[0006] Currently, to reduce overall power consumption, common solutions for related devices are to choose low-power atomic clocks or low-power temperature-controlled crystal oscillators. However, even lower-power frequency sources such as temperature-compensated crystal oscillators are not an option due to their poor drift performance. Due to their physical mechanisms, the power consumption of atomic clocks or low-power temperature-controlled crystal oscillators is difficult to reduce significantly further while maintaining usable performance indicators. This necessitates the use of a large number of batteries to maintain power supply for extended periods. Therefore, a long-standing unresolved technical dilemma exists in this field: how to obtain high-precision, high-stability frequency and time signals in demanding environments (such as underwater operations) powered by batteries and emphasizing long endurance, while simultaneously significantly reducing the overall power consumption of the frequency source.

[0007] Most existing low-power solutions focus on optimizing the design and manufacturing of a single frequency source, making a static trade-off between accuracy and power consumption. However, the margin for further power consumption reduction is extremely limited for both chip atomic clocks and temperature-controlled crystal oscillators, making it difficult to fundamentally resolve this contradiction.

[0008] Developing an innovative power consumption control method for a self-timed combination frequency source, which can further reduce its overall average power consumption while ensuring the accuracy of the final output frequency, is a feasible method and means to solve the problem and resolve the contradiction. Summary of the Invention

[0009] The present invention aims to provide a power consumption control method and device for a self-timed combined frequency source. By working together with a high-precision, high-power frequency source and a low-precision, low-power frequency source, the overall average power consumption is significantly reduced while ensuring the accuracy of frequency and time output.

[0010] This invention provides a power consumption control method for a self-timed combined frequency source, comprising two frequency sources: a high-precision, high-power frequency source and a low-precision, low-power frequency source. The method includes the following steps: S1: When there is an external second signal, the high-precision high-power frequency source and the low-precision low-power frequency source enter the disciplined mode respectively, and perform frequency adjustment and PPS phase adjustment according to the external second signal. The low-precision low-power frequency source performs the final frequency output and PPS output. S2: After taming is complete, the external second signal is cut off, and the high-precision high-power frequency source and the low-precision low-power frequency source enter the timekeeping mode. The high-precision, high-power frequency source is supplied with power intermittently, while the low-precision, low-power frequency source is supplied with power continuously. When the high-precision, high-power frequency source is powered off, the low-precision, low-power frequency source oscillates freely. When the high-precision, high-power frequency source is powered, it is used as a frequency reference to perform frequency calibration and PPS phase calibration on the low-precision, low-power frequency source. The final frequency output and PPS output are obtained from the low-precision, low-power frequency source.

[0011] According to the present invention, a power consumption control method for a self-time-combining frequency source is provided, wherein the disciplined mode includes: S1.1: Acquire and measure the phase difference between the high-precision, high-power frequency source PPS signal and the external PPS signal, and the phase difference between the low-precision, low-power frequency source PPS signal and the external PPS signal; S1.2: Calculate the frequency difference between the high-precision, high-power frequency source and the external PPS signal, and the frequency difference between the low-precision, low-power frequency source and the external PPS signal, respectively. S1.3: Calculate the frequency adjustment amount and PPS phase adjustment amount of the high-precision high-power frequency source and the low-precision low-power frequency source respectively, and perform frequency adjustment and PPS phase adjustment on the high-precision high-power frequency source and the low-precision low-power frequency source respectively. S1.4: The final frequency output and PPS output are performed by the low-precision, low-power frequency source.

[0012] According to the present invention, a power consumption control method for a self-timed combined frequency source is provided, wherein the timed mode includes: S2.1: The high-precision, high-power frequency source enters the power-off phase, with a power-off duration of T1. During the T1 phase, the low-precision, low-power frequency source continues to supply power and oscillates freely. S2.2: The high-precision, high-power frequency source enters the power supply phase, with a power supply duration of T2; S2.3: In the T2 stage, the phase difference between the low-precision low-power frequency source PPS signal and the high-precision high-power frequency source PPS signal is acquired and measured. Calculate the frequency difference between the low-precision low-power frequency source and the high-precision high-power frequency source, and calculate the frequency adjustment amount and PPS phase adjustment amount of the low-precision low-power frequency source, and perform frequency adjustment and PPS phase adjustment on the low-precision low-power frequency source. The final frequency output and PPS output are obtained from the low-precision, low-power frequency source. S2.4: Repeat steps S2.1 through S2.3.

[0013] The power consumption control method for a self-time-combining frequency source provided by the present invention further includes: By adjusting and setting appropriate durations for T1 and T2, the overall average power consumption of the combined frequency source can be controlled.

[0014] The present invention also provides a power consumption control device for a self-timed combination frequency source, comprising: Low-precision, low-power frequency source: used to output the final frequency and PPS; High-precision, high-power frequency source: used as a frequency reference for frequency calibration and PPS phase calibration of the low-precision, low-power frequency source under conditions without external seconds; Control system: Used for acquiring, measuring, calculating and regulating signals from high-precision, high-power frequency sources, low-precision, low-power frequency sources and external PPS signals; used for intermittent power supply control of high-precision, high-power frequency sources.

[0015] According to the present invention, a power consumption control device for a self-timed combined frequency source is provided, wherein the control system includes a main control unit, a first adjustment unit, and a second adjustment unit. Central control unit: Used to control the switching between the docile mode and the timekeeping mode, control the intermittent power supply of the high-precision, high-power frequency source, and other conventional monitoring and control; The first adjustment unit includes: First acquisition module: used to acquire and measure the phase difference between the high-precision, high-power frequency source PPS signal and the external PPS signal, and the phase difference between the low-precision, low-power frequency source PPS signal and the external PPS signal in docile mode. First calculation module: used to calculate the frequency difference between the high-precision high-power frequency source and the external PPS signal, and the frequency difference between the low-precision low-power frequency source and the external PPS signal in docile mode; First control module: In docile mode, calculates the frequency adjustment amount and PPS phase adjustment amount of the high-precision high-power frequency source and the low-precision low-power frequency source respectively, and performs frequency adjustment and PPS phase adjustment on the high-precision high-power frequency source and the low-precision low-power frequency source respectively. The second adjustment unit includes: The second acquisition module is used to acquire and measure the phase difference between the low-precision, low-power frequency source PPS signal and the high-precision, high-power frequency source PPS signal in time-keeping mode. The second calculation module is used to calculate the frequency difference between the low-precision, low-power frequency source and the high-precision, high-power frequency source in time-keeping mode. The second control module is used to calculate the frequency adjustment amount and PPS phase adjustment amount of the low-precision low-power frequency source in timekeeping mode, and to perform frequency adjustment and PPS phase adjustment on the low-precision low-power frequency source.

[0016] The power consumption control method and control device for a self-timed combined frequency source provided by this invention creatively utilizes two frequency sources. Through intermittent power supply to a high-precision, high-power frequency source and its coordinated operation and scheduling with a low-precision, low-power frequency source, the combined frequency source significantly reduces the overall average power consumption compared to a single frequency source while ensuring frequency and time output accuracy. Specifically, this invention has the following beneficial effects: (1) This invention introduces a low-precision, low-power frequency source as the main output source and implements an intermittent power supply strategy for the high-precision, high-power frequency source when there is no external second signal, which greatly reduces the actual working time of the high-precision, high-power frequency source. By reasonably setting the power-off duration T1 and the power supply duration T2, the overall average power consumption can be reduced by more than 30% compared with the single frequency source scheme, while having little impact on the final output accuracy and ensuring availability.

[0017] (2) Although the low-precision, low-power frequency source has a large frequency drift during the free oscillation phase, its frequency and phase deviations can be corrected in a timely manner by periodically calibrating the high-precision, high-power frequency source during the power supply phase. This strategy of "intermittent calibration + continuous output" utilizes the reference performance of the high-precision, high-power frequency source while avoiding the high power consumption problem caused by its continuous operation. Ultimately, the low-precision, low-power frequency source outputs a frequency and PPS signal that meet the accuracy requirements, achieving the optimal balance between power consumption and accuracy.

[0018] (3) By adjusting the duration of T1 and T2, users can adjust the control strategy according to the different requirements of power consumption and accuracy in actual application scenarios. This flexibility makes the present invention widely applicable to various scenarios such as surface monitoring, seabed exploration, marine geophysical exploration, buoys, unmanned vessels, underground, and inside buildings where GPS / BDS signals cannot be received but high-precision time and frequency signals are required.

[0019] (4) The control method proposed in this invention can be implemented within a single frequency source product system or outside the system using multiple existing frequency source products, making it easy to integrate with existing navigation, communication, and data acquisition systems. Furthermore, the method can also be implemented through computer programs, storage media, or electronic devices, possessing good scalability and industrialization prospects. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the docile mode process in the power consumption control method of the self-timed combination frequency source according to an embodiment of this application; Figure 2 This is a schematic diagram of the timekeeping mode in the power consumption control method of the self-timekeeping combined frequency source according to an embodiment of this application; Figure 3 This is a schematic diagram of the power consumption control device of the self-timed combination frequency source according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the first adjustment unit according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the second adjustment unit in an embodiment of this application. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] The embodiments of the present invention are implemented under the premise of the technical solution of the present invention, and detailed implementation methods and processes are given. However, the protection scope of the present invention is not limited to the following embodiments. The process parameters in the following embodiments that do not specify specific conditions are generally in accordance with conventional conditions.

[0024] The endpoints and any values ​​of the ranges disclosed in this invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this invention.

[0025] The following is combined with Figures 1-2 This invention describes a power consumption control method for a self-time-controlled combinational frequency source. For example... Figure 1 and Figure 2 As shown, the power consumption control method for a self-timed combination frequency source includes: S1: When there is an external second signal, the high-precision high-power frequency source and the low-precision low-power frequency source enter the discipline mode respectively, and perform frequency adjustment and PPS phase adjustment according to the external second signal. The low-precision low-power frequency source performs the final frequency output and PPS output.

[0026] In the time and frequency domain, the external second signal usually refers to the "external second pulse" or "reference second pulse". It is a precise pulse signal (1PPS) that comes from an external high-precision clock source, one per second. Common sources are satellite navigation receivers such as GPS / BDS (collectively known as GNSS receivers). After locking onto a satellite, a GNSS receiver can generate a very precise 1PPS signal that is highly synchronized with UTC (Coordinated Universal Time).

[0027] "Domination" refers to the process by which a local clock (such as the high-precision high-power frequency source and the low-precision low-power frequency source in this application) continuously receives and compares with the external second signal, and constantly fine-tunes its own output frequency and PPS phase, so that the long-term stability and accuracy of its output signal (frequency and PPS) are consistent with the external second.

[0028] Common high-precision, high-power frequency sources include atomic clocks (such as rubidium atomic clocks, chip atomic clocks, cesium atomic clocks, and hydrogen atomic clocks), temperature-controlled crystal oscillators, and high-precision silicon oscillators; Common low-precision, low-power frequency sources include RC oscillators, MEMS oscillators, temperature-compensated crystal oscillators, and ordinary crystal oscillators.

[0029] Furthermore, the taming mode includes: S1.1: Acquire and measure the phase difference between the high-precision, high-power frequency source PPS signal and the external PPS signal, and the phase difference between the low-precision, low-power frequency source PPS signal and the external PPS signal; S1.2: Calculate the frequency difference between the high-precision, high-power frequency source and the external PPS signal, and the frequency difference between the low-precision, low-power frequency source and the external PPS signal, respectively. S1.3: Calculate the frequency adjustment amount and PPS phase adjustment amount of the high-precision high-power frequency source and the low-precision low-power frequency source respectively, and perform frequency adjustment and PPS phase adjustment on the high-precision high-power frequency source and the low-precision low-power frequency source respectively. S1.4: The final frequency output and PPS output are performed by the low-precision, low-power frequency source.

[0030] When an external second signal is present, both the high-precision, high-power frequency source and the low-precision, low-power frequency source simultaneously enter the discipline mode and undergo phase-locked training. Through parallel calibration of the dual sources, it is ensured that both reach a high-precision state before entering the timekeeping mode, laying the foundation for subsequent timekeeping.

[0031] S2: After taming is complete, the external second signal is cut off, and the high-precision high-power frequency source and the low-precision low-power frequency source enter the timekeeping mode. The high-precision, high-power frequency source is supplied with power intermittently, while the low-precision, low-power frequency source is supplied with power continuously. When the high-precision, high-power frequency source is powered off, the low-precision, low-power frequency source oscillates freely. When the high-precision, high-power frequency source is powered, it is used as a frequency reference to perform frequency calibration and PPS phase calibration on the low-precision, low-power frequency source. The final frequency output and PPS output are obtained from the low-precision, low-power frequency source.

[0032] Furthermore, the punctuality mode includes: S2.1: The high-precision, high-power frequency source enters the power-off phase, with a power-off duration of T1. During the T1 phase, the low-precision, low-power frequency source continues to supply power and oscillates freely. S2.2: The high-precision, high-power frequency source enters the power supply phase, with a power supply duration of T2; S2.3: In the T2 stage, the phase difference between the low-precision low-power frequency source PPS signal and the high-precision high-power frequency source PPS signal is acquired and measured. Calculate the frequency difference between the low-precision low-power frequency source and the high-precision high-power frequency source, and calculate the frequency adjustment amount and PPS phase adjustment amount of the low-precision low-power frequency source, and perform frequency adjustment and PPS phase adjustment on the low-precision low-power frequency source. The final frequency output and PPS output are obtained from the low-precision, low-power frequency source. S2.4: Repeat steps S2.1 through S2.3.

[0033] This invention introduces a low-precision, low-power frequency source as the main output source and implements an intermittent power supply strategy for the high-precision, high-power frequency source when there is no external second signal, significantly reducing the actual operating time of the high-precision, high-power frequency source. By reasonably setting the power-off duration T1 and the power-on duration T2, the overall average power consumption can be reduced by more than 30% compared to the single-frequency source solution, while minimizing the impact on the final output accuracy and ensuring availability.

[0034] Let: the power consumption of the high-precision, high-power frequency source be P1, the power consumption of the low-precision, low-power frequency source be P2, the power-off time of the high-precision, high-power frequency source be T1, the power-on time of the high-precision, high-power frequency source be T2, and the overall average power consumption of the combined frequency sources be P. 总 ,but

[0035] For example: Select a high-precision, high-power frequency source with a power consumption of 100mW. Set the power-off time T1 of this high-precision, high-power frequency source to 2.5 hours and the power supply time T2 to 1.5 hours. Select a low-precision, low-power frequency source with a power consumption of 30mW. According to formula (1), P can be calculated as follows: 总 The power consumption is 67.5mW, which is 32.5% lower than the single frequency source solution (100mW) of the high-precision, high-power frequency source.

[0036] By adjusting the durations of T1 and T2, users can tailor the control strategy to meet varying power consumption and accuracy requirements in different application scenarios. This flexibility allows the invention to be widely applied in various scenarios where high-precision time and frequency signals are required, such as surface monitoring, seabed exploration, marine geophysical exploration, buoys, unmanned vessels, underground operations, and inside buildings, where GPS / BDS signals cannot be received.

[0037] Although the low-precision, low-power frequency source exhibits significant frequency drift during the free oscillation phase, its frequency and phase deviations can be promptly corrected through periodic calibration of the high-precision, high-power frequency source during the power-on phase. This "intermittent calibration + continuous output" strategy utilizes the reference performance of the high-precision, high-power frequency source while avoiding the high power consumption issues associated with continuous operation. Ultimately, the low-precision, low-power frequency source outputs a frequency and PPS signal that meet the accuracy requirements, achieving an optimal balance between power consumption and accuracy.

[0038] The power consumption control device for the self-timed combination frequency source provided by the present invention will be described below. The power consumption control device for the self-timed combination frequency source described below and the power consumption control method for the self-timed combination frequency source described above can be referred to in correspondence.

[0039] like Figure 3 As shown, the power consumption control device of the self-timed combination frequency source mainly includes three core parts: Low-precision, low-power frequency source: can use ordinary crystal oscillators (XO) or temperature-compensated crystal oscillators (TCXO), etc., with low power consumption, but poor frequency stability, responsible for continuously outputting frequency and PPS signal; High-precision, high-power frequency source: used as a frequency reference to perform frequency calibration and PPS phase calibration of the low-precision, low-power frequency source under conditions without external seconds. It can be a temperature-controlled crystal oscillator (OCXO), a chip-scale atomic clock (CSAC), a rubidium atomic clock, etc. It has high frequency accuracy but high power consumption. Intermittent power supply is used to reduce the overall average power consumption. Control system: Used for acquiring, measuring, calculating and regulating signals from high-precision, high-power frequency sources, low-precision, low-power frequency sources and external PPS signals; used for intermittent power supply control of high-precision, high-power frequency sources.

[0040] Furthermore, such as Figures 3-5 As shown, the control system includes a central control unit, a first regulating unit, and a second regulating unit. Central control unit: Used to control the switching between the docile mode and the timekeeping mode, control the intermittent power supply of the high-precision, high-power frequency source, and other conventional monitoring and control; The first adjustment unit includes: First acquisition module 101: used to acquire and measure the phase difference between the high-precision high-power frequency source PPS signal and the external PPS signal, and the phase difference between the low-precision low-power frequency source PPS signal and the external PPS signal in docile mode. First calculation module 102: used to calculate the frequency difference between the high-precision high-power frequency source and the external PPS signal, and the frequency difference between the low-precision low-power frequency source and the external PPS signal in docile mode; First control module 103: In docile mode, calculates the frequency adjustment amount and PPS phase adjustment amount of the high-precision high-power frequency source and the low-precision low-power frequency source respectively, and performs frequency adjustment and PPS phase adjustment on the high-precision high-power frequency source and the low-precision low-power frequency source respectively. The second adjustment unit includes: The second acquisition module 201 is used to acquire and measure the phase difference between the low-precision low-power frequency source PPS signal and the high-precision high-power frequency source PPS signal in timekeeping mode. Second calculation module 202: used to calculate the frequency difference between the low-precision low-power frequency source and the high-precision high-power frequency source in timekeeping mode; The second control module 203 is used to calculate the frequency adjustment amount and PPS phase adjustment amount of the low-precision low-power frequency source in timekeeping mode, and to perform frequency adjustment and PPS phase adjustment on the low-precision low-power frequency source.

[0041] It should be further explained that in the self-timed frequency source power consumption control device proposed in this application, the control system is not limited to the specific structural implementation described in the text. Any device structure capable of implementing the power consumption control method falls within the protection scope of this application. Specifically, the control methods for the high-precision high-power frequency source and the low-precision low-power frequency source have various feasible implementation forms, including but not limited to the following: The control system can be an independent control unit, connected to both a high-precision, high-power frequency source and a low-precision, low-power frequency source to perform data acquisition, measurement, computation, and control functions. Alternatively, the control system can be partially or fully integrated into the high-precision, high-power frequency source, using its built-in processing capabilities to monitor and calibrate the low-precision, low-power frequency source. Or, the control system can be partially or fully integrated into the low-precision, low-power frequency source, where it will be in charge of power supply management and calibration of the high-precision, high-power frequency source. Furthermore, multiple frequency sources can also adopt an integrated hardware design within the system. For example, a low-precision, low-power frequency source can be integrated inside a high-precision, high-power frequency source, sharing some control circuits or processor resources to form an independent product. Furthermore, the control system can be implemented through one or more methods of software or hardware logic, and its control strategy can be flexibly configured according to the actual application scenario. For example, by adjusting the power outage duration T1 and power supply duration T2 in the timekeeping mode, different power consumption and accuracy balances can be achieved.

[0042] Regardless of the control architecture or integration method used, as long as it can achieve multi-frequency source collaborative operation, time-sharing power supply, and dynamic calibration, it falls within the protection scope of the device described in this application.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power consumption control method for a self-timed combination frequency source, comprising two frequency sources: a high-precision, high-power frequency source and a low-precision, low-power frequency source, characterized in that, The method includes the following steps: S1: When there is an external second signal, the high-precision high-power frequency source and the low-precision low-power frequency source enter the disciplined mode respectively, and perform frequency adjustment and PPS phase adjustment according to the external second signal. The low-precision low-power frequency source performs the final frequency output and PPS output. S2: After taming is complete, the external second signal is cut off, and the high-precision high-power frequency source and the low-precision low-power frequency source enter the timekeeping mode. The high-precision, high-power frequency source is supplied with power intermittently, while the low-precision, low-power frequency source is supplied with power continuously. When the high-precision, high-power frequency source is powered off, the low-precision, low-power frequency source oscillates freely. When the high-precision, high-power frequency source is powered, it is used as a frequency reference to perform frequency calibration and PPS phase calibration on the low-precision, low-power frequency source. The final frequency output and PPS output are obtained from the low-precision, low-power frequency source.

2. The power consumption control method for a self-time-keeping combined frequency source according to claim 1, characterized in that, The taming modes include: S1.1: Acquire and measure the phase difference between the high-precision, high-power frequency source PPS signal and the external PPS signal, and the phase difference between the low-precision, low-power frequency source PPS signal and the external PPS signal; S1.2: Calculate the frequency difference between the high-precision, high-power frequency source and the external PPS signal, and the frequency difference between the low-precision, low-power frequency source and the external PPS signal, respectively. S1.3: Calculate the frequency adjustment amount and PPS phase adjustment amount of the high-precision high-power frequency source and the low-precision low-power frequency source respectively, and perform frequency adjustment and PPS phase adjustment on the high-precision high-power frequency source and the low-precision low-power frequency source respectively. S1.4: The final frequency output and PPS output are performed by the low-precision, low-power frequency source.

3. The power consumption control method for a self-time-controlled combination frequency source according to claim 1, characterized in that, The timekeeping mode includes: S2.1: The high-precision, high-power frequency source enters the power-off phase, with a power-off duration of T1. During the T1 phase, the low-precision, low-power frequency source continues to supply power and oscillates freely. S2.2: The high-precision, high-power frequency source enters the power supply phase, with a power supply duration of T2; S2.3: In the T2 stage, the phase difference between the low-precision low-power frequency source PPS signal and the high-precision high-power frequency source PPS signal is acquired and measured. Calculate the frequency difference between the low-precision low-power frequency source and the high-precision high-power frequency source, and calculate the frequency adjustment amount and PPS phase adjustment amount of the low-precision low-power frequency source, and perform frequency adjustment and PPS phase adjustment on the low-precision low-power frequency source. The final frequency output and PPS output are obtained from the low-precision, low-power frequency source. S2.4: Repeat steps S2.1 through S2.

3.

4. The power consumption control method for a self-time-keeping combined frequency source according to claim 3, characterized in that, Also includes: By adjusting and setting appropriate durations for T1 and T2, the overall average power consumption of the combined frequency source can be controlled.

5. A power consumption control device for a self-time-controlled combination frequency source, characterized in that, include: Low-precision, low-power frequency source: used to output the final frequency and PPS; High-precision, high-power frequency source: used as a frequency reference for frequency calibration and PPS phase calibration of the low-precision, low-power frequency source under conditions without external seconds; Control system: Used for acquiring, measuring, calculating and regulating signals from high-precision, high-power frequency sources, low-precision, low-power frequency sources and external PPS signals; used for intermittent power supply control of high-precision, high-power frequency sources.

6. The power consumption control device for a self-time-keeping combined frequency source according to claim 5, characterized in that, The control system includes a central control unit, a first adjustment unit, and a second adjustment unit. Central control unit: Used to control the switching between the docile mode and the timekeeping mode, control the intermittent power supply of the high-precision, high-power frequency source, and other conventional monitoring and control; The first adjustment unit includes: First acquisition module: used to acquire and measure the phase difference between the high-precision, high-power frequency source PPS signal and the external PPS signal, and the phase difference between the low-precision, low-power frequency source PPS signal and the external PPS signal in docile mode. First calculation module: used to calculate the frequency difference between the high-precision high-power frequency source and the external PPS signal, and the frequency difference between the low-precision low-power frequency source and the external PPS signal in docile mode; First control module: In docile mode, calculates the frequency adjustment amount and PPS phase adjustment amount of the high-precision high-power frequency source and the low-precision low-power frequency source respectively, and performs frequency adjustment and PPS phase adjustment on the high-precision high-power frequency source and the low-precision low-power frequency source respectively. The second adjustment unit includes: The second acquisition module is used to acquire and measure the phase difference between the low-precision, low-power frequency source PPS signal and the high-precision, high-power frequency source PPS signal in time-keeping mode. The second calculation module is used to calculate the frequency difference between the low-precision, low-power frequency source and the high-precision, high-power frequency source in time-keeping mode. The second control module is used to calculate the frequency adjustment amount and PPS phase adjustment amount of the low-precision low-power frequency source in timekeeping mode, and to perform frequency adjustment and PPS phase adjustment on the low-precision low-power frequency source.

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