Standard clock device based on beidou common view disciplined crystal oscillator

Abstract

The application discloses a standard clock device based on a Beidou common view tamed crystal oscillator, which comprises a common view comparison unit, a signal receiving and calculating unit, a communication unit and a tamed voltage-controlled crystal oscillator, the communication unit receives reference common view data; the tamed voltage-controlled crystal oscillator outputs a frequency signal; the signal receiving and calculating unit receives a Beidou satellite signal and generates original observation based on the frequency signal; the signal receiving and calculating unit calculates a time deviation between a first time standard signal and a second time standard signal based on the frequency signal; the common view comparison unit performs common view comparison based on the reference common view data, the original observation and the time deviation, converts a phase modulation amount into a control instruction and sends the control instruction to the signal receiving and calculating unit, and converts a frequency deviation adjustment amount into a voltage signal and transmits the voltage signal to the tamed voltage-controlled crystal oscillator to realize synchronization of the tamed voltage-controlled crystal oscillator and a reference clock. The device provided by the application is small in size, low in energy consumption and low in manufacturing cost, and the accuracy and reliability of time calibration are improved.

Description

Technical Field

[0001] This invention relates to the field of satellite timing technology, and in particular to a standard clock device based on a BeiDou co-view disciplined crystal oscillator. Background Technology

[0002] Currently, hundreds of millions of metering devices in the power grid system are operating stably. The accuracy and reliability of their clocks are crucial for implementing electricity market reforms and time-of-use pricing policies, as well as improving the operational management of distribution transformer areas. However, for a large number of metering devices within distribution transformer areas, there is a lack of effective means of transmitting time values. For example, older electricity meters read the meter time online via narrowband carrier communication or RS-485 bus and perform absolute time calibration through online broadcasting. However, due to the limitations of communication bandwidth and quality of narrowband carrier and other communication media, the time accuracy of calibration is only on the order of minutes, resulting in poor precision and a low success rate. Summary of the Invention

[0003] To address the shortcomings of the existing technologies, this invention provides a standard clock device based on a BeiDou common-view disciplined crystal oscillator. The main purpose is to solve the technical problems of the lack of effective time value transmission means in the metering equipment of the power grid, resulting in poor accuracy and low success rate of time calibration.

[0004] This invention provides a standard clock device based on a BeiDou common-view disciplined crystal oscillator, comprising: a common-view comparison unit, a signal receiving and calculation unit, a communication unit, and a disciplined voltage-controlled crystal oscillator;

[0005] The communication unit is communicatively connected to the common-view comparison unit. The communication unit is used to receive reference common-view data sent by the reference clock and send the reference common-view data to the common-view comparison unit.

[0006] The output terminal of the disciplined voltage-controlled crystal oscillator is connected to the signal receiving and computing unit, and the disciplined voltage-controlled crystal oscillator is used to output a frequency signal to the signal receiving and computing unit;

[0007] The signal receiving and computing unit is interactively connected to the common-view comparison unit. The signal receiving and computing unit is used to receive BeiDou satellite signals, generate raw observations based on the BeiDou satellite signals and the frequency signals, and send them to the common-view comparison unit.

[0008] The signal receiving and calculation unit calculates the time deviation between the first time standard signal generated by the signal receiving and calculation unit and the second time standard signal generated by frequency division of the frequency signal based on the frequency signal, and sends it to the common-view comparison unit.

[0009] The common-view comparison unit performs a common-view comparison based on the reference common-view data, the original observations, and the time deviation, generates a phase modulation amount and a frequency deviation adjustment amount, converts the phase modulation amount into a control command and sends it to the signal receiving and calculation unit, and converts the frequency deviation adjustment amount into a voltage signal and transmits it to the disciplined voltage-controlled crystal oscillator to achieve synchronization between the disciplined voltage-controlled crystal oscillator and the reference clock.

[0010] Optionally, the signal receiving and computing unit includes a BeiDou module, a time difference measurement circuit, and a frequency division circuit;

[0011] The output terminal of the docile voltage-controlled crystal oscillator is connected to the input terminal of the Beidou module, the first input terminal of the time difference measurement circuit, and the first input terminal of the frequency division circuit, respectively, for outputting the frequency signal;

[0012] The first output terminal of the BeiDou module is connected to the first input terminal of the common-view comparison unit, and the second output terminal of the BeiDou module is connected to the second input terminal of the time difference measurement circuit. The BeiDou module is used to receive BeiDou satellite signals and generate raw observations based on the frequency signal and the BeiDou satellite signals and send them to the common-view comparison unit. The BeiDou module generates the first time standard signal and sends it to the time difference measurement circuit.

[0013] The second input terminal of the frequency division circuit is connected to the first output terminal of the common-view comparison unit, and the output terminal of the frequency division circuit is connected to the third input terminal of the time difference measurement circuit. The frequency division circuit generates the second time standard signal based on the frequency signal and sends it to the time difference measurement circuit. The frequency division circuit is also used to receive the control command.

[0014] The output terminal of the time difference measurement circuit is connected to the second input terminal of the common-view comparison unit, and is used to calculate the time deviation between the first time standard signal and the second time standard signal based on the frequency signal, and send the time deviation to the common-view comparison unit.

[0015] Optionally, the signal receiving and computing unit further includes a BeiDou antenna, which is connected to the BeiDou module and is used to receive the BeiDou satellite signals and transmit the BeiDou satellite signals to the BeiDou module.

[0016] Optionally, the standard clock device based on the BeiDou common-view disciplined crystal oscillator further includes a digital-to-analog converter (DAC). The DAC is connected to the second output terminal of the common-view comparison unit and the input terminal of the disciplined voltage-controlled crystal oscillator. The common-view comparison unit converts the frequency deviation adjustment amount into a voltage signal through the DAC and sends it to the disciplined voltage-controlled crystal oscillator.

[0017] Optionally, the BeiDou module is connected to a time information output interface.

[0018] Optionally, the docile voltage-controlled crystal oscillator is connected to a frequency signal output interface, a time standard signal input interface, and a time standard signal output interface.

[0019] Optionally, the communication unit includes a 4G communication module, which is communicatively connected to the reference clock and the common-view comparison unit, respectively, for receiving reference common-view data sent by the reference clock and sending the reference common-view data to the common-view comparison unit.

[0020] Optionally, the common-view comparison unit includes an ARM processor.

[0021] Optionally, the standard clock device based on the BeiDou common-view disciplined crystal oscillator further includes a power supply unit, which is connected to the common-view comparison unit, the signal receiving and calculation unit, the communication unit and the disciplined voltage-controlled crystal oscillator respectively, for providing power.

[0022] Optionally, the frequency of the frequency signal is 10MHz.

[0023] The standard clock device based on a BeiDou common-view tamed crystal oscillator provided by this invention achieves high taming accuracy of the crystal oscillator based on BeiDou common-view, and the device is small in size, low in energy consumption, and low in manufacturing cost. It utilizes a common-view comparison unit to achieve bidirectional comparison with a reference clock and the BeiDou satellite system, improving the accuracy and reliability of time calibration. The tamed voltage-controlled crystal oscillator can adjust the frequency signal according to the common-view comparison results to maintain synchronization with the reference clock, enabling the device to automatically adapt to frequency changes and provide a stable clock signal output. The inclusion of a communication unit enables online measurement, further improving measurement accuracy.

[0024] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0025] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 A schematic diagram of the structure of a standard clock device based on a BeiDou common-view disciplined crystal oscillator provided in an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the structure of a standard clock device based on a BeiDou common-view disciplined crystal oscillator provided in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal module connections of a standard clock device based on a BeiDou common-view tamed crystal oscillator, provided in an embodiment of the present invention. Detailed Implementation

[0030] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] This invention provides a standard clock device based on a BeiDou common-view disciplined crystal oscillator, such as... Figure 1 As shown, the system includes a common-view comparison unit, a signal receiving and computing unit, a communication unit, and a disciplined voltage-controlled crystal oscillator. The communication unit is communicatively connected to the common-view comparison unit, receiving reference common-view data transmitted by a reference clock and transmitting this data to the common-view comparison unit. The output of the disciplined voltage-controlled crystal oscillator is connected to the signal receiving and computing unit, outputting a frequency signal to it. The signal receiving and computing unit is interactively connected to the common-view comparison unit, receiving BeiDou satellite signals, generating raw observations based on the BeiDou satellite signals and frequency signals, and... The signal is sent to the common-view comparison unit; the signal receiving and calculation unit calculates the time deviation between the first time standard signal generated by the signal receiving and calculation unit and the second time standard signal generated by frequency division based on the frequency signal, and sends it to the common-view comparison unit; the common-view comparison unit performs common-view comparison based on the reference common-view data, the original observations and the time deviation, generates the phase modulation amount and the frequency deviation adjustment amount, converts the phase modulation amount into a control command and sends it to the signal receiving and calculation unit, and converts the frequency deviation adjustment amount into a voltage signal and transmits it to the disciplined voltage-controlled crystal oscillator to realize the synchronization of the disciplined voltage-controlled crystal oscillator with the reference clock.

[0032] The standard clock device based on a BeiDou common-view disciplined crystal oscillator provided by this invention features high discipline accuracy for the crystal oscillator due to BeiDou common-view, small overall size, low power consumption, and low manufacturing cost. It utilizes a common-view comparison unit to achieve bidirectional comparison with a reference clock and the BeiDou satellite system, improving the accuracy and reliability of time calibration. The disciplined voltage-controlled crystal oscillator can adjust the frequency signal according to the common-view comparison results, maintaining synchronization with the reference clock, enabling the device to automatically adapt to frequency changes and provide a stable clock signal output. The inclusion of a communication unit enables online measurement, further improving measurement accuracy.

[0033] Among them, the disciplined voltage-controlled crystal oscillator (VCO), as an electronic component, is used to generate stable frequency signals. It typically consists of an oscillator and a voltage-controlled circuit. A VCO is an oscillator that can change its output frequency according to changes in the input voltage signal. However, the frequency stability of VCOs is usually not high enough, and is affected by environmental changes and device parameter drift. To improve the frequency stability of VCOs, a disciplined VCO can be used. A disciplined VCO receives an external reference signal, such as a GPS signal or other clock signal, compares it with the reference signal, and generates an error signal. This error signal is processed by a voltage signal control circuit and applied to the VCO in a certain way, so that its output frequency can automatically track and correct the frequency of the reference signal. Therefore, a disciplined VCO can keep the frequency of the VCO synchronized with the frequency of the reference signal, thereby achieving a highly stable and accurate frequency output.

[0034] In this context, a reference clock refers to a clock used as a stable, precise, and accurate time reference in a clock system. It typically consists of a high-performance atomic clock or other high-precision clock sources. Its main function is to provide a time reference for the system, synchronizing and calibrating other clocks and devices. It possesses extremely high stability and accuracy and can maintain time consistency over long periods. Reference clocks usually employ advanced time measurement and calibration techniques, such as atomic oscillators, quartz crystal oscillators, or other high-precision clock sources. In this application, the reference clock transmits reference common-view data, a data type used to achieve time synchronization and frequency comparison between the slave clock and the reference clock. Specifically, it includes the reference clock's time information and other relevant parameters. Regarding time synchronization, the reference common-view data provides the reference clock's timestamp, i.e., the absolute time value of the reference clock, as well as calibration information about the time transmission process. The slave clock compares the received reference common-view data with its own time to calculate the slave clock's deviation and adjustment amount, thereby achieving time synchronization. In terms of frequency comparison, the reference common-view data provides the frequency information of the reference clock, namely the frequency deviation and phase change of the reference clock. The slave clock receives the frequency information from the reference common-view data, calculates its own frequency deviation and phase error, and performs corresponding calibration to achieve frequency comparison and synchronization. By using the reference common-view data, precise time synchronization and frequency comparison between the slave clock and the reference clock can be achieved, ensuring accurate data transmission and processing, while improving the stability and reliability of the system.

[0035] Specifically, in the above embodiments, such as Figure 2As shown, the signal receiving and computing unit includes a BeiDou module, a time difference measurement circuit, and a frequency division circuit. The output of the disciplined voltage-controlled crystal oscillator is connected to the input of the BeiDou module, the first input of the time difference measurement circuit, and the first input of the frequency division circuit, respectively, for outputting a frequency signal. The first output of the BeiDou module is connected to the first input of the common-view comparison unit, and the second output of the BeiDou module is connected to the second input of the time difference measurement circuit. The BeiDou module receives BeiDou satellite signals and generates raw observations based on the frequency signal and the BeiDou satellite signals, which are then sent to the common-view comparison unit. The first time standard signal is generated and sent to the time difference measurement circuit. The second input of the frequency divider circuit is connected to the first output of the common-view comparison unit, and the output of the frequency divider circuit is connected to the third input of the time difference measurement circuit. The frequency divider circuit generates a second time standard signal based on the frequency signal and sends it to the time difference measurement circuit. The frequency divider circuit is also used to receive control commands. The output of the time difference measurement circuit is connected to the second input of the common-view comparison unit. It is used to calculate the time deviation between the first time standard signal and the second time standard signal based on the frequency signal and send the time deviation to the common-view comparison unit.

[0036] This embodiment discloses the structure of the signal receiving and calculation unit, which includes three functional modules: a BeiDou module, a time difference measurement circuit, and a frequency division circuit. The BeiDou module receives BeiDou satellite signals and generates raw observations and a first time standard signal based on the frequency signal and the BeiDou satellite signals. This can be used to achieve high-precision time standardization and synchronization. The disciplined voltage-controlled crystal oscillator provides a stable frequency signal to drive the BeiDou module, the time difference measurement circuit, and the frequency division circuit, thereby correcting the frequency and ensuring the stability and reliability of the device. The time difference measurement circuit uses the second time standard signal from the frequency division circuit and the first time standard signal transmitted by the BeiDou module to calculate the time deviation between them. This time deviation can be used to correct and synchronize the device's time. Finally, the common-view comparison unit performs a common-view comparison based on the received reference common-view data, raw observations, and time deviation, thereby generating a phase modulation amount and a frequency deviation adjustment amount. The phase modulation amount is converted into control commands to control the frequency division circuit, while the frequency deviation adjustment amount is used to control the disciplined voltage-controlled crystal oscillator to synchronize with the reference clock, thus serving as a standard clock device. Therefore, the device provided in this application can be applied to some scenarios with high requirements for time synchronization and accuracy.

[0037] Specifically, a frequency divider circuit, as an electronic circuit, is used to reduce the frequency of an input signal to a lower frequency, and typically consists of a counter, a flip-flop, or a frequency reducer. During the frequency division process, the counter or flip-flop divides the period of the input signal by counting or triggering operations, thereby reducing its frequency. Generally, the frequency divider circuit divides each period of the input signal into multiple shorter periods according to a set division ratio. In this application, the frequency divider circuit receives the frequency signal output from a disciplined voltage-controlled crystal oscillator and uses this as a reference to divide the frequency into a second time standard signal output, which is transmitted to the time difference measurement circuit. The phase of the second time standard signal output is controlled by instructions from the common-view comparison unit.

[0038] Furthermore, the signal receiving and computing unit also includes a BeiDou antenna, which is connected to the BeiDou module and is used to receive BeiDou satellite signals and transmit them to the BeiDou module.

[0039] In this embodiment, the BeiDou satellite system, as a global navigation satellite system, can transmit BeiDou satellite signals. These signals provide positioning and accurate time information, which is crucial for applications such as navigation, positioning, and time synchronization. The BeiDou antenna is specifically designed to receive BeiDou satellite signals. It possesses excellent directivity and antenna gain, enabling efficient signal reception even under environmental interference and signal attenuation, thus improving the reliability and stability of signal reception. As part of the BeiDou module's receiver, the BeiDou antenna can be seamlessly integrated with the BeiDou satellite system, increasing the system's flexibility and compatibility. It can be integrated with other applications and services based on BeiDou satellite signals. In summary, introducing a BeiDou antenna provides highly reliable signal reception, accurate positioning and time information, enhances the system's global coverage, and increases its flexibility and compatibility.

[0040] Furthermore, the standard clock device based on the BeiDou common-view disciplined crystal oscillator also includes a digital-to-analog converter (DAC). The DAC is connected to the second output of the common-view comparison unit and the input of the disciplined voltage-controlled crystal oscillator, respectively. The common-view comparison unit converts the frequency deviation adjustment amount into a voltage signal through the DAC and sends it to the disciplined voltage-controlled crystal oscillator.

[0041] In this embodiment, the common-view comparison unit calculates the frequency deviation adjustment amount and then converts it into a voltage signal via a connected digital-to-analog converter (DAC). This voltage signal is then sent to the disciplined voltage-controlled oscillator (VCO) to adjust its frequency, enabling precise adjustment of the VCO frequency and improving the frequency stability of the device. The DAC converts the frequency deviation adjustment amount into a voltage signal and sends it to the VCO for adjustment, achieving frequency synchronization and consistency between devices. Frequency synchronization is crucial for scenarios requiring coordinated operation between multiple devices and where timing consistency is critical, thus finding wide application in communication and synchronous data transmission. Furthermore, the DAC converts the frequency deviation adjustment amount into a voltage signal and sends it to the VCO, enabling automatic frequency control, eliminating the need for manual frequency adjustment, and improving system automation and reliability. Finally, automatic frequency adjustment of the VCO reduces frequency drift and jitter. In summary, converting the frequency deviation adjustment amount into a voltage signal and sending it to a disciplined voltage-controlled crystal oscillator enables precise frequency adjustment, synchronization, and consistency. It also allows for automatic frequency control and reduces frequency drift and jitter, thus improving equipment performance and stability.

[0042] Furthermore, the BeiDou module is connected to a time information output interface.

[0043] In this embodiment, such as Figure 3 As shown, setting a time information output interface on the BeiDou module provides accurate time references, specifically time information in seconds or higher precision, ensuring the accuracy of system operation and data processing. Furthermore, connecting to the time information output interface allows multiple devices to maintain time synchronization. For example, when multiple devices are transmitting data or cooperating, sharing time information from the BeiDou module ensures they maintain the same time base, guaranteeing timing consistency and data integrity. The time information output interface facilitates integration of the BeiDou module with other devices or systems, allowing direct input of time information provided by the BeiDou module into other devices or systems without additional conversion or processing, simplifying the system integration process. Setting up the time information output interface offers high flexibility, such as outputting timestamps for data records or triggering control for time-related events, allowing for flexible application based on specific application scenarios.

[0044] Furthermore, the tamed voltage-controlled crystal oscillator is connected to a frequency signal output interface, a time standard signal input interface, and a time standard signal output interface.

[0045] In this embodiment, the frequency signal output interface provides a stable and accurate frequency signal for clock synchronization or frequency control of other devices or systems. The disciplined voltage-controlled crystal oscillator (VCO) provides an accurate frequency through the frequency signal output interface to ensure the frequency stability and accuracy of the device or system, which is especially important for applications requiring a high-precision clock source. The time standard signal input interface and time standard signal output interface enable the disciplined VCO to accurately receive and transmit time standard signals. By connecting to the time standard signal input interface, the disciplined VCO can synchronize with an external time source, ensuring the time consistency of the device or system. Through the time standard signal output interface, the disciplined VCO can act as a time standard source, providing accurate time standard signals to other devices, achieving time synchronization of the entire system. This application's inclusion of a frequency signal output interface, a time standard signal input interface, and a time standard signal output interface allows for more flexible integration of the disciplined VCO into other devices or systems, facilitating time calibration, frequency synchronization, and the provision of time standard signals, thereby enhancing system stability and consistency.

[0046] Specifically, in the above embodiments, the communication unit includes a 4G communication module, which is communicatively connected to the reference clock and the common-view comparison unit, respectively, and is used to receive the reference common-view data sent by the reference clock and send the reference common-view data to the common-view comparison unit.

[0047] In this embodiment, by connecting the 4G communication module, the reference clock and the common-view comparison unit can establish a stable communication connection, ensuring the reliability of data transmission. This supports the reference clock in sending reference common-view data to the common-view comparison unit for processing and analysis, and enables the common-view comparison unit to perform accurate time and frequency comparisons, thereby improving the system's accuracy and performance. The 4G communication module, as a communication interface, simplifies system integration. By connecting the 4G communication module, the reference clock and the common-view comparison unit can easily communicate with other devices or systems without additional conversions or interfaces, simplifying the system integration process and improving the system's usability and maintainability.

[0048] Specifically, in the above embodiments, the common-view comparison unit includes an ARM processor.

[0049] In this embodiment, the ARM processor is a high-performance processor with high computing power and processing speed. The common-view alignment unit can specifically utilize an ARM processor for fast and efficient data processing, including analyzing received reference common-view data and calculating frequency deviation adjustments, which helps improve the system's real-time performance and data processing speed. The ARM processor itself has flexible algorithm implementation capabilities, allowing the common-view alignment unit to leverage its flexibility to optimize and implement various algorithms to meet the needs of different application scenarios. For example, complex time and frequency calibration algorithms can be implemented using an ARM processor to improve system accuracy and stability. Furthermore, the ARM processor has extensive support and development resources, facilitating easy integration and development. The ARM processor's development ecosystem also provides rich software libraries and tools, aiding in the functional expansion and optimization of the common-view alignment unit. Moreover, using an ARM processor in the common-view alignment unit can achieve lower power consumption, reducing system energy consumption and heat generation, while also saving costs, which is particularly important in energy-efficient applications such as mobile and portable devices.

[0050] Specifically, in the above embodiments, the standard clock device based on the BeiDou common-view disciplined crystal oscillator further includes a power supply unit, which is connected to the common-view comparison unit, the signal receiving and calculation unit, the communication unit and the disciplined voltage-controlled crystal oscillator, respectively, for power supply.

[0051] In this embodiment, the power supply unit provides a stable power supply to the entire standard clock device. A stable power supply is crucial for ensuring the normal operation of the equipment, especially for high-precision clock devices. A stable power supply can prevent voltage fluctuations from affecting clock accuracy and performance, improving system stability and reliability, and ensuring continuous and stable system operation. Finally, by providing a unified power interface and management method through the power supply unit, power supply and management between components become easier, improving the efficiency and reliability of system integration.

[0052] Specifically, in the above embodiment, the frequency of the frequency signal is 10MHz.

[0053] In this embodiment, a 10MHz frequency signal provides a high-precision timing reference, ensuring the accuracy and reliability of data transmission, measurement, and synchronization operations within the system. The 10MHz frequency signal serves as a reference source for frequency synchronization; by synchronizing the frequencies of other devices or systems with the 10MHz signal, frequency consistency can be ensured, enabling accurate data transmission and processing. Frequency synchronization is crucial for communication systems, network equipment, and data processing systems. A unified frequency signal can be used for timing adjustment and clock recovery. By comparing with external clock signals, the system's clock frequency and phase can be calibrated and adjusted, thereby achieving clock synchronization and stability.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A standard clock device based on a BeiDou co-view disciplined crystal oscillator, characterized in that, include: Common-view comparison unit, signal receiving and computing unit, communication unit, and disciplined voltage-controlled crystal oscillator; The communication unit is communicatively connected to the common-view comparison unit. The communication unit is used to receive reference common-view data sent by the reference clock and send the reference common-view data to the common-view comparison unit. The output terminal of the disciplined voltage-controlled crystal oscillator is connected to the signal receiving and computing unit, and the disciplined voltage-controlled crystal oscillator is used to output a frequency signal to the signal receiving and computing unit; The signal receiving and computing unit is interactively connected to the common-view comparison unit. The signal receiving and computing unit is used to receive BeiDou satellite signals, generate raw observations based on the BeiDou satellite signals and the frequency signals, and send them to the common-view comparison unit. The signal receiving and calculation unit calculates the time deviation between the first time standard signal generated by the signal receiving and calculation unit and the second time standard signal generated by frequency division of the frequency signal based on the frequency signal, and sends it to the common-view comparison unit. The common-view comparison unit performs a common-view comparison based on the reference common-view data, the original observations, and the time deviation, generates a phase modulation amount and a frequency deviation adjustment amount, converts the phase modulation amount into a control command and sends it to the signal receiving and calculation unit, and converts the frequency deviation adjustment amount into a voltage signal and transmits it to the disciplined voltage-controlled crystal oscillator to achieve synchronization between the disciplined voltage-controlled crystal oscillator and the reference clock. The signal receiving and computing unit includes a BeiDou module, a time difference measurement circuit, and a frequency division circuit; The output terminal of the docile voltage-controlled crystal oscillator is connected to the input terminal of the Beidou module, the first input terminal of the time difference measurement circuit, and the first input terminal of the frequency division circuit, respectively, for outputting the frequency signal; The first output terminal of the BeiDou module is connected to the first input terminal of the common-view comparison unit, and the second output terminal of the BeiDou module is connected to the second input terminal of the time difference measurement circuit. The BeiDou module is used to receive BeiDou satellite signals and generate raw observations based on the frequency signal and the BeiDou satellite signals and send them to the common-view comparison unit. The BeiDou module generates the first time standard signal and sends it to the time difference measurement circuit. The second input terminal of the frequency division circuit is connected to the first output terminal of the common-view comparison unit, and the output terminal of the frequency division circuit is connected to the third input terminal of the time difference measurement circuit. The frequency division circuit generates the second time standard signal based on the frequency signal and sends it to the time difference measurement circuit. The frequency division circuit is also used to receive the control command. The output terminal of the time difference measurement circuit is connected to the second input terminal of the common-view comparison unit, and is used to calculate the time deviation between the first time standard signal and the second time standard signal based on the frequency signal, and send the time deviation to the common-view comparison unit.

2. The standard clock device based on a BeiDou co-view disciplined crystal oscillator according to claim 1, characterized in that, The signal receiving and computing unit also includes a BeiDou antenna, which is connected to the BeiDou module and is used to receive the BeiDou satellite signals and send the BeiDou satellite signals to the BeiDou module.

3. The standard clock device based on a BeiDou common-view disciplined crystal oscillator according to claim 1, characterized in that, The standard clock device based on the BeiDou common-view disciplined crystal oscillator further includes a digital-to-analog converter (DAC). The DAC is connected to the second output terminal of the common-view comparison unit and the input terminal of the disciplined voltage-controlled crystal oscillator. The common-view comparison unit converts the frequency deviation adjustment amount into a voltage signal through the DAC and sends it to the disciplined voltage-controlled crystal oscillator.

4. The standard clock device based on a BeiDou co-view disciplined crystal oscillator according to claim 1, characterized in that, The Beidou module is connected to a time information output interface.

5. The standard clock device based on a BeiDou co-view disciplined crystal oscillator according to claim 1, characterized in that, The docile voltage-controlled crystal oscillator is connected to a frequency signal output interface, a time standard signal input interface, and a time standard signal output interface.

6. The standard clock device based on a BeiDou common-view disciplined crystal oscillator according to claim 1, characterized in that, The communication unit includes a 4G communication module, which is communicatively connected to the reference clock and the common-view comparison unit, respectively, and is used to receive reference common-view data sent by the reference clock and send the reference common-view data to the common-view comparison unit.

7. The standard clock device based on a BeiDou co-view disciplined crystal oscillator according to claim 1, characterized in that, The common-view comparison unit includes an ARM processor.

8. The standard clock device based on a BeiDou common-view disciplined crystal oscillator according to claim 1, characterized in that, The standard clock device based on the BeiDou common-view disciplined crystal oscillator also includes a power supply unit, which is connected to the common-view comparison unit, the signal receiving and calculation unit, the communication unit and the disciplined voltage-controlled crystal oscillator respectively, and is used to provide power.

9. The standard clock device based on a BeiDou common-view disciplined crystal oscillator according to claim 1, characterized in that, The frequency of the frequency signal is 10MHz.

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