Compact active hydrogen atomic clock complete machine structure

Abstract

The utility model discloses a compact complete structure of an active hydrogen atomic clock, which belongs to the technical field of atomic clocks and is characterized in that a physical system is arranged in front of a receiver module, a temperature control module, a switching power supply module, a constant current source module and a secondary power supply module; the receiver module and the temperature control module are transversely laid on the left side of a bottom plate in the case body through fastening screws, the temperature control module is arranged on the left rear portion of the case body, and the receiver module is located in front of the temperature control module. The switching power supply module and the constant current source module are vertically arranged at the right rear part of the bottom plate in the case body, and the constant current source module is positioned in front of the switching power supply module; the secondary power supply module is arranged on the right side of the receiver module, and the secondary power supply module is located in front of the constant current source module. The whole structure of the active hydrogen atomic clock realizes compact structure and excellent thermal management performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of atomic clocks, and in particular relates to a compact active hydrogen atomic clock complete structure. Background Art

[0002] The medium- and long-term construction goals and mission requirements of the National Internet Satellite System are to form integrated communication, navigation, and remote sensing service capabilities with global coverage, advanced technology, and independent control.

[0003] The only practical atomic clock products available are hydrogen, rubidium, and cesium clocks. Rubidium atomic clocks were the first to be miniaturized and applied to satellite platforms, and their industrialization is relatively mature. However, they suffer from relatively poor drift rates and low stability. Cesium atomic clocks have only been developed relatively recently in China, and their maturity, reliability, and environmental adaptability are still lacking. They are also heavy (approximately 30 kg), so they are mainly deployed on the ground.

[0004] Hydrogen maser clocks, with their excellent performance in long-term stability, short- to medium-term stability, and drift rate, are a key development direction for spaceborne atomic clocks. They are deployed in large numbers as master clocks in the BeiDou-3 satellite system. Hydrogen maser clocks used on the ground in China consist of numerous components within their chassis, including the physical system, receiver module, temperature control module, switching power supply module, constant current source module, and secondary power supply module. The layout of these components within the chassis affects the compactness of the structure. Furthermore, mechanical changes and external heat can cause changes in the resonant frequency of the physical system's resonant cavity. Therefore, further optimization of the overall structure and thermal management of hydrogen maser clocks is necessary. Utility Model Content

[0005] In view of this, the present invention proposes a compact active hydrogen atomic clock structure, which optimizes the overall structure and thermal management of the hydrogen atomic clock.

[0006] The utility model adopts the following technical solutions:

[0007] A compact active hydrogen atomic clock structure includes a chassis body and a physical system, a receiver module, a temperature control module, a switching power supply module, a constant current source module, and a secondary power supply module disposed within the chassis body. In particular, the physical system is disposed in front of the receiver module, the temperature control module, the switching power supply module, the constant current source module, and the secondary power supply module.

[0008] The receiver module and temperature control module are laid horizontally on the left side of the bottom plate inside the chassis body by fastening screws, and the temperature control module is placed on the left rear of the chassis body, and the receiver module is located in front of the temperature control module;

[0009] The switching power supply module and the constant current source module are arranged vertically at the right rear part of the bottom plate inside the chassis body, and the constant current source module is located in front of the switching power supply module;

[0010] The secondary power supply module is arranged on the right side of the receiver module, and is located in front of the constant current source module.

[0011] Furthermore, the secondary power supply module is fixed to the inner bottom plate of the chassis body through a sheet metal bracket.

[0012] Furthermore, a support block is provided on the physical system, and the physical system is installed on the bracket through the support block.

[0013] Furthermore, the physical system is installed on a bracket of the inner bottom plate of the chassis body, and a shock-absorbing spring is provided on the bracket.

[0014] Furthermore, heat dissipation ribs are provided on the outer shell surfaces of the receiver module and the temperature control module.

[0015] Furthermore, ventilation holes for heat dissipation are provided on the side panels of the chassis shell of the chassis body.

[0016] Furthermore, the temperature control module includes a temperature acquisition unit, a digital adaptive PID controller, and a thermoelectric cooler module;

[0017] The temperature acquisition unit can collect the temperature inside the chassis body through a digital circuit and feed it back to the digital adaptive PID controller in real time. The digital adaptive PID controller adjusts the working state of the thermoelectric cooler module according to the feedback signal to achieve temperature control inside the chassis body.

[0018] Furthermore, the front panel of the chassis shell of the chassis body is provided with an indicator light for indicating whether the output of the physical system is normal or not;

[0019] The front plate of the chassis shell of the chassis body is provided with a handle.

[0020] Furthermore, the chassis body is a standard 4U chassis.

[0021] Beneficial effects:

[0022] 1. The physical system is set in front of the receiver module, temperature control module, switching power supply module, constant current source module and secondary power supply module. This reduces the impact of circuit waste heat on the resonant frequency of the physical system. At the same time, it can reasonably distribute the weight and achieve a compact structural layout, which is convenient for the overall layout of the chassis, signal output and electrical equipment routing, and achieves a compact structural layout.

[0023] The receiver module and temperature control module are laid horizontally on the left side of the bottom plate inside the chassis body by fastening screws. This increases the external convection contact area, improves the heat dissipation efficiency of the module, and ensures the normal and stable operation of the module.

[0024] The switching power supply module and constant current source module are arranged vertically on the right rear side of the bottom plate inside the chassis body, reducing the interference of the power supply electric field on the magnetic field within the active hydrogen atomic clock physical system; the constant current source module is located in front of the switching power supply module, which reduces the interference of the constant electric field generated by the constant current source on the microwave resonant cavity of the active hydrogen atomic clock physical system;

[0025] The secondary power supply module is set on the right side of the receiver module and in front of the constant current source module, which facilitates the internal routing of the overall structure, reduces the interference of the circuit radiation noise generated by the power supply on the active hydrogen atomic clock physical system, and reduces the influence of the power supply on the output characteristics of the hydrogen atomic clock resonant cavity.

[0026] 2. The physical system is installed on the bracket of the inner bottom plate of the chassis body, and the bracket is provided with a shock-absorbing spring to improve the shockproof performance.

[0027] 3. The outer shell surface of the receiver module and temperature control module is equipped with heat dissipation ribs, which increases the heat conduction contact area, improves the heat dissipation efficiency of the module, and ensures the normal and stable operation of each module in the chassis.

[0028] 4. The side panels of the chassis shell are provided with ventilation holes for heat dissipation, which provide a good ventilation and heat dissipation environment for the operation of the equipment and prevent the circuit components from being in standby for a long time and poor heat dissipation from affecting the time and frequency stability of the entire system.

[0029] 5. The temperature control module includes a temperature acquisition unit, a digital adaptive PID controller, and a thermoelectric cooler module. The temperature acquisition unit collects the temperature within the chassis through digital circuitry and provides real-time feedback to the digital adaptive PID controller. The digital adaptive PID controller adjusts the operating state of the thermoelectric cooler module based on the feedback signal to achieve temperature control within the chassis. Utilizing PID control and the thermoelectric cooler module enables high-precision temperature control, effectively reducing the impact of temperature on other circuits and improving overall system performance.

[0030] 6. The chassis body is set as a standard 4U chassis, which makes it convenient for the entire chassis body to be placed in a cabinet as an independent module, and the front panel of the chassis shell is provided with a handle to facilitate the overall transportation. It can be used in the laboratory and can also be carried on mobile devices such as engineering vehicles. It can be widely supported and applied in national timekeeping services, frequency standard sources for basic scientific research, Beidou navigation services, combined guidance, deep space tracking and other fields, and can replace time and frequency products such as rubidium clocks and passive hydrogen clocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the overall structure of a compact active hydrogen atomic clock provided by an embodiment of the present utility model;

[0032] Figure 2 A top view of the internal structure of a compact active hydrogen atomic clock provided by an embodiment of the present invention;

[0033] Figure 3 for Figure 2 Schematic diagram of the physical system structure;

[0034] 1- Chassis body, 2- Chassis shell front panel, 3- Chassis shell side panel, 4- Handle, 5- Physical system, 6- Receiver module, 7- Temperature control module, 8- Switching power supply module, 9- Constant current source module, 10- Secondary power supply module, 11- Internal bottom plate, 12- Bracket, 13- Support block. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0036] Reference Figures 1 to 3 , this embodiment provides a compact active hydrogen atomic clock structure, including a chassis body 1 and a physical system 5, a receiver module 6, a temperature control module 7, a switching power supply module 8, a constant current source module 9 and a secondary power supply module 10 arranged in the chassis body 1. In particular, the physical system 5 is arranged in front of the receiver module 6, the temperature control module 7, the switching power supply module 8, the constant current source module 9 and the secondary power supply module 10; the receiver module 6 and the temperature control module 7 are horizontally laid on the left side of the bottom plate 11 inside the chassis body 1 by fastening screws, and the temperature control module 7 is placed at the left rear of the chassis body 1, and the receiver module 6 is located in front of the temperature control module 7; the switching power supply module 8 and the constant current source module 9 are vertically arranged at the right rear of the bottom plate 11 inside the chassis body 1, and the constant current source module 9 is located in front of the switching power supply module 8; the secondary power supply module 10 is arranged on the right side of the receiver module, and the secondary power supply module 10 is located in front of the constant current source module 9.

[0037] In this way, the physical system 5 is arranged in front of the receiver module 6, the temperature control module 7, the switching power supply module 8, the constant current source module 9 and the secondary power supply module 10, which reduces the influence of the waste heat of the circuit on the resonant frequency of the physical system 5. At the same time, the weight can be reasonably distributed, and a compact structural layout can be achieved, which is convenient for the overall layout of the chassis, signal output and wiring of electrical equipment, and a compact structural layout can be achieved; the receiver module 6 and the temperature control module 7 are laid horizontally on the left side of the bottom plate inside the chassis body 1 by fastening screws, which increases the external convection contact area, improves the heat dissipation efficiency of the module, and ensures the normal and stable operation of the module; the switching power supply module 8 and the constant current source Module 9 is arranged vertically at the right rear part of the bottom plate inside the chassis body 1, reducing the interference of the power supply electric field on the magnetic field inside the main hydrogen atomic clock physical system 5; and the constant current source module 9 is located in front of the switching power supply module 8, which reduces the interference of the constant electric field generated by the constant current source on the microwave resonant cavity in the active hydrogen atomic clock physical system 5; the secondary power supply module 10 is arranged on the right side of the receiver module 6, and the secondary power supply module 10 is located in front of the constant current source module 9, which facilitates the internal routing of the overall structure, reduces the interference of the circuit radiation noise generated by the constant current source on the active hydrogen atomic clock physical system 5, and reduces the influence of the constant current source on the output characteristics of the hydrogen atomic clock microwave resonant cavity.

[0038] It should be noted that the working principles of the above-mentioned modules in the active hydrogen atomic clock are common knowledge. Specifically, the constant current source module 9 is used to provide a control current to the nickel tube in the physical system 5 to realize hydrogen flow regulation, so that the physical system 5 generates a hydrogen maser signal; the receiver module 6 is used to receive the hydrogen maser signal generated by the physical system 5, and through operations including radio frequency amplification, mixing, and filtering, the constant temperature crystal oscillator output signal of the receiver module 6 is locked to the hydrogen maser signal; the temperature control module 7 is used to control the resonant cavity temperature of the physical system 5; the switching power supply module 8 serves as a primary power supply to convert alternating current into direct current; the secondary power supply module 10 converts the voltage output by the switching power supply module 8 to power the physical system 5, the receiver module 6, the temperature control module 7, and the constant current source module 9.

[0039] Specifically, in this embodiment, the secondary power supply module 10 is fixed to the internal base plate 11 of the chassis body 1 via a sheet metal bracket. A support block 13 is provided on the physical system 5, and the physical system 5 is mounted on the bracket 12 via the support block 13. Furthermore, the physical system 5 is mounted on the bracket 12 of the internal base plate 11 of the chassis body 1, and the bracket 12 is provided with a shock-absorbing spring, which improves the shockproof performance. The outer shell surfaces of the receiver module 6 and the temperature control module 7 are provided with heat dissipation ribs, which increase the thermal contact area, improve the module's heat dissipation efficiency, and ensure the normal and stable operation of each module within the chassis body. Furthermore, the side panels 3 of the chassis shell of the chassis body 1 are provided with ventilation holes for heat dissipation, which provide a good ventilation and heat dissipation environment for the operation of the equipment, preventing the circuit components from being in standby for a long time and poor heat dissipation, which may affect the time and frequency stability of the entire system.

[0040] More specifically, in this embodiment, the temperature control module 7 includes a temperature acquisition unit, a digital adaptive PID controller, and a thermoelectric cooler module. The temperature acquisition unit can acquire the temperature within the chassis body 1 through digital circuitry and provide real-time feedback to the digital adaptive PID controller. The digital adaptive PID controller adjusts the operating state of the thermoelectric cooler module based on the feedback signal to achieve temperature control within the chassis body 1. The temperature control module 7 utilizes PID control and a thermoelectric cooler module to achieve high-precision temperature control, effectively reducing the impact of temperature on other circuits and improving overall system performance. Furthermore, the chassis body 1 is configured as a standard 4U chassis, making it easy to place the entire chassis body 1 as a standalone module in a cabinet. The front panel 2 of the chassis housing of the chassis body 1 is equipped with a handle 4 for easy transport. It can be used in laboratories or on mobile devices such as engineering vehicles. It can be widely used in national timekeeping services, frequency standard sources for basic scientific research, Beidou navigation services, integrated guidance, deep space tracking, and other fields. The compact active hydrogen atomic clock structure provided in this embodiment can replace time and frequency products such as rubidium clocks and passive hydrogen clocks.

[0041] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A compact active hydrogen atomic clock structure, comprising a chassis body (1), a physical system (5) arranged in the chassis body (1), a receiver module (6), a temperature control module (7), a switching power supply module (8), a constant current source module (9) and a secondary power supply module (10), characterized in that: The physical system (5) is arranged in front of the receiver module (6), the temperature control module (7), the switching power supply module (8), the constant current source module (9) and the secondary power supply module (10); The receiver module (6) and the temperature control module (7) are laid horizontally on the left side of the bottom plate (11) inside the chassis body (1) by fastening screws, and the temperature control module (7) is placed at the left rear of the chassis body (1), and the receiver module (6) is located in front of the temperature control module (7); The switching power supply module (8) and the constant current source module (9) are arranged vertically at the right rear portion of the inner bottom plate (11) of the chassis body (1), and the constant current source module (9) is located in front of the switching power supply module (8); The secondary power supply module (10) is arranged on the right side of the receiver module (6), and the secondary power supply module (10) is located in front of the constant current source module (9).

2. The compact active hydrogen atomic clock structure according to claim 1, characterized in that: The secondary power supply module (10) is fixed to the inner bottom plate (11) of the chassis body (1) via a sheet metal bracket.

3. The compact active hydrogen atomic clock structure according to claim 1, characterized in that: A support block (13) is provided on the physical system (5), and the physical system (5) is mounted on the bracket (12) via the support block (13).

4. The compact active hydrogen atomic clock structure according to claim 3, characterized in that: The physical system (5) is mounted on the bracket (12) of the inner bottom plate (11) of the chassis body (1), and a shock-absorbing spring is provided on the bracket (12).

5. The compact active hydrogen atomic clock structure according to claim 1, characterized in that: The outer shell surfaces of the receiver module (6) and the temperature control module (7) are provided with heat dissipation ribs.

6. The compact active hydrogen atomic clock structure according to claim 1, characterized in that: Ventilation holes for heat dissipation are provided on the side panels (3) of the chassis shell of the chassis body (1).

7. The compact active hydrogen atomic clock structure according to claim 1, characterized in that: The temperature control module (7) includes a temperature acquisition unit, a digital adaptive PID controller, and a thermoelectric cooler module; The temperature acquisition unit can acquire the temperature inside the chassis body (1) through a digital circuit and feed it back to the digital adaptive PID controller in real time. The digital adaptive PID controller adjusts the working state of the thermoelectric cooler module according to the feedback signal to achieve temperature control inside the chassis body (1).

8. The compact active hydrogen atomic clock structure according to claim 1, characterized in that: The chassis housing front plate (2) of the chassis body (1) is provided with an indicator light for indicating whether the output of the physical system (5) is normal or not; The chassis shell front plate (2) of the chassis body (1) is provided with a handle (4).

9. A compact active hydrogen atomic clock structure according to any one of claims 1 to 8, characterized in that: The chassis body (1) is a standard 4U chassis.

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