Hydrogen atomic clock, power supply circuit of coil and power supply adjusting circuit

Abstract

The invention discloses a hydrogen atomic clock, a power supply circuit of a coil and a power supply adjusting circuit. The power supply adjusting circuit comprises a magnetic sensor and a supplementary power supply circuit. And the magnetic sensor is arranged at the quantization axis magnetic field coil and is used for sampling a magnetic field generated by the quantization axis magnetic field coil. The supplementary power supply circuit is connected with the two ends of the magnetic sensor and the two ends of the quantization axis magnetic field coil and used for providing corresponding compensation current for the quantization axis magnetic field coil according to the magnetic field sampling result of the magnetic sensor, power supply adjustment of the quantization axis magnetic field coil is achieved, and the power supply adjustment introduces a sampling signal of the magnetic sensor as feedback. Power supply compensation can be more accurate, and the long-term accuracy of the hydrogen atomic clock is improved.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen atomic clocks, and in particular, to a hydrogen atomic clock, a power supply circuit for a coil, and a power supply adjustment circuit. Background Art

[0002] A hydrogen atomic clock uses a hydrogen maser to utilize the electromagnetic wave radiated when the ground state hydrogen atoms transition from the hyperfine energy level (F = 1, mF = 0) to the hyperfine energy level (F = 0, mF = 0) to control and calibrate a quartz crystal oscillator, and locks the phase of the quartz crystal oscillator to the phase of the coherent atomic transition frequency in the maser. There are multiple interactions between the radio frequency field and the magnetic dipole transition of hydrogen atoms within each clock cycle. Therefore, a quantized axis magnetic field of a given amount is required at specific positions where the atomic group moves.

[0003] If the quantized axis magnetic field is not set appropriately, it will seriously affect the performance of the atomic clock. This quantized axis magnetic field is also called the C field. The uniformity and stability of the C field are important factors affecting the quality of the transition spectral line. Over time, the C field coil and its related devices will undergo a certain degree of attenuation, and the existing power supply circuit cannot adaptively adjust the power supply parameters for the C field coil to this attenuation, thereby affecting the accuracy of the hydrogen atomic clock. Summary of the Invention

[0004] The present invention provides a hydrogen atomic clock, a power supply circuit for a coil, and a power supply adjustment circuit to make the power supply compensation more accurate and improve the long-term accuracy of the hydrogen atomic clock.

[0005] According to one aspect of the present invention, there is provided a power supply adjustment circuit for a quantized axis magnetic field coil, which is applied to a hydrogen atomic clock. The power supply adjustment circuit for the quantized axis magnetic field coil includes:

[0006] A magnetic sensor, disposed at the quantized axis magnetic field coil, for sampling the magnetic field generated by the quantized axis magnetic field coil;

[0007] A supplementary power supply circuit, respectively connected to both ends of the magnetic sensor and the quantized axis magnetic field coil, for providing a corresponding compensation current to the quantized axis magnetic field coil according to the magnetic field sampling result of the magnetic sensor.

[0008] Optionally, the magnetic sensor includes a magnetoresistive sensor and / or a fluxgate sensor.

[0009] Optionally, the magnetic sensor is a magnetoresistive sensor;

[0010] The supplementary power supply circuit includes a bridge unit and an amplification unit; the bridge unit is connected to the magnetoresistive sensor and is configured to generate a comparison pressure difference according to the resistance value difference between the real-time resistance of the magnetoresistive sensor and a preset resistance, where the preset resistance is equal to the resistance across the magnetoresistive sensor when the quantization axis magnetic field coil generates a working magnetic field; the amplification unit is connected to the bridge unit and the quantization axis magnetic field coil, and is configured to perform operational amplification processing on the comparison pressure difference to generate the compensation current and supply it to both ends of the quantization axis magnetic field coil.

[0011] Optionally, the bridge unit includes a Wheatstone bridge.

[0012] Optionally, the magnetic sensor is a fluxgate sensor, and the fluxgate sensor is configured to generate a corresponding sensing electrical signal according to the magnetic field generated by the quantization axis magnetic field coil;

[0013] The supplementary power supply circuit includes an amplification unit, the amplification unit is connected to the fluxgate sensor, and is configured to generate the compensation current according to the difference between the sensing electrical signal and a preset electrical signal and supply it to both ends of the quantization axis magnetic field coil, where the preset electrical signal is equal to the electrical signal generated by the fluxgate sensor when the quantization axis magnetic field coil generates a working magnetic field.

[0014] Optionally, the amplification unit includes a differential amplifier.

[0015] Optionally, the amplification unit further includes an operational amplifier and a power amplifier, and the operational amplifier and the power amplifier are sequentially arranged between the output end of the differential amplifier and the quantization axis magnetic field coil.

[0016] According to another aspect of the present invention, there is provided a power supply circuit for a quantization axis magnetic field coil, the power supply circuit including a main power supply circuit and the power supply adjustment circuit for the quantization axis magnetic field coil according to any of the first aspects;

[0017] The main power supply circuit includes a power supply, a voltage stabilizing chip, a current limiting resistor, a voltage stabilizing diode, and a voltage dividing resistor; the power supply is sequentially connected to the voltage stabilizing chip, the current limiting resistor, the voltage stabilizing diode and grounded; the voltage dividing resistor and the quantization axis magnetic field coil are connected in series between both ends of the voltage stabilizing diode;

[0018] The power supply adjustment circuit is respectively connected to both ends of the quantization axis magnetic field coil.

[0019] Optionally, the main power supply circuit further includes a capacitor, and the capacitor is arranged between both ends of the quantization axis magnetic field coil.

[0020] According to another aspect of the present invention, there is provided a hydrogen atomic clock, which includes a power supply circuit for the quantization axis magnetic field coil as described in any of the second aspects.

[0021] The hydrogen atomic clock, the power supply circuit of the coil, and the power supply adjustment circuit provided by the present invention. The power supply adjustment circuit includes a magnetic sensor and a supplementary power supply circuit. The magnetic sensor is disposed at the quantization axis magnetic field coil for sampling the magnetic field generated by the quantization axis magnetic field coil. The supplementary power supply circuit is respectively connected to both ends of the magnetic sensor and the quantization axis magnetic field coil, and is used to provide a corresponding compensation current to the quantization axis magnetic field coil according to the magnetic field sampling result of the magnetic sensor, thereby realizing the power supply adjustment of the quantization axis magnetic field coil. The power supply adjustment introduces the sampling signal of the magnetic sensor as feedback, which can make the power supply compensation more accurate and improve the long-term accuracy of the hydrogen atomic clock.

[0022] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the composition of a quantization axis magnetic field coil and its power supply adjustment circuit provided by an embodiment of the present invention;

[0025] Figure 2 It is a circuit schematic diagram of another power supply adjustment circuit for the quantization axis magnetic field coil provided by an embodiment of the present invention;

[0026] Figure 3 It is a circuit schematic diagram of yet another power supply adjustment circuit for the quantization axis magnetic field coil provided by an embodiment of the present invention;

[0027] Figure 4 It is a circuit schematic diagram of a power supply circuit for the quantization axis magnetic field coil provided by an embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of the composition of a hydrogen atomic clock provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] To solve the problems mentioned in the background art, an embodiment of the present invention proposes a power supply adjustment circuit for a quantized axis magnetic field coil, and this power supply adjustment circuit is applied to a hydrogen atomic clock. Figure 1 It is a schematic diagram of the composition of a quantized axis magnetic field coil and its power supply adjustment circuit provided by an embodiment of the present invention. Refer to Figure 1 , the power supply adjustment circuit 100 of the quantized axis magnetic field coil 103 includes a magnetic sensor 101 and a supplementary power supply circuit 102. The magnetic sensor 101 is disposed at the quantized axis magnetic field coil 103 and is used to sample the magnetic field generated by the quantized axis magnetic field coil 103. The supplementary power supply circuit 102 is respectively connected to both ends of the magnetic sensor 101 and the quantized axis magnetic field coil 103, and is used to provide a corresponding compensation current to the quantized axis magnetic field coil 103 according to the magnetic field sampling result of the magnetic sensor 101.

[0032] Specifically, the quantization axis magnetic field coil 103 is a core component in a hydrogen atomic clock for generating and maintaining a highly stable static magnetic field. Its function is to provide a quantization direction reference for the hyperfine energy levels of hydrogen atoms, ensuring the accuracy and stability of the atomic transition frequency. On the one hand, the quantization axis magnetic field coil 103 can define the quantization direction. The hyperfine energy levels (F = 0 and F = 1) of the hydrogen atom ground state will undergo Zeeman splitting in the magnetic field generated by the quantization axis magnetic field coil 103, and the direction of the quantization axis magnetic field is the quantization axis. The quantization axis magnetic field orients the atomic spin angular momentum along a fixed direction, eliminates the degenerate states of the magnetic quantum number mF, and ensures that the electromagnetic wave radiated during the transition from mF = 0 to mF = 0 is used as the frequency standard. On the other hand, the magnetic field generated by the quantization axis magnetic field coil 103 can also shield the geomagnetic field and other external magnetic interferences, stabilize the residual magnetic field at the order of 1 μT, and avoid clock drift caused by Zeeman frequency shift.

[0033] The magnetic sensor 101 refers to a sensing device that can detect a magnetic field and its changes. The magnetic sensor 101 can be arranged near the quantization axis magnetic field coil 103. Exemplarily, the magnetic sensor 101 can be arranged in the quantization axis magnetic field generated by the quantization axis coil. The magnetic sensor 101 can use magnetic induction principles such as the magnetoresistive effect or the fluxgate principle to detect the magnetic field value of the quantization axis magnetic field. Exemplarily, the magnetic sensor 101 can include a magnetoresistive sensor and / or a fluxgate sensor.

[0034] The supplementary power supply circuit 102 refers to a circuit that supplies supplementary power to the quantization axis magnetic field coil 103. It can generate a compensation current based on the comparison result between the sampling data of the magnetic sensor 101 and the preset magnetic field parameters, and perform additional compensation on the original main supply current of the quantization axis magnetic field coil 103, thereby achieving stable adjustment of the quantization axis magnetic field. Exemplarily, the supplementary power supply circuit 102 can include multiple-stage operational amplifiers to analyze and process the electrical signal including the sampling data and generate a compensation current. The output terminal of the last-stage operational amplifier is connected to both ends of the quantization axis magnetic field coil 103 to provide an additional compensation current for the quantization axis magnetic field coil 103 outside the main supply current.

[0035] Exemplarily, during the operation of a hydrogen atomic clock, the main power supply circuit provides a main supply current to the quantization axis magnetic field coil 103 to generate a quantization axis magnetic field. As the working duration of the hydrogen atomic clock increases, the performance of the quantization axis magnetic field coil 103, its auxiliary devices, circuits, and the main power supply circuit may decay, resulting in a deviation of the parameters of the quantization axis magnetic field from the preset magnetic field parameters. To prevent the deviation of the parameters of the quantization axis magnetic field, during the operation of the hydrogen atomic clock, the magnetic sensor 101 of the power supply adjustment circuit samples the quantization axis magnetic field in real time. The supplementary power supply circuit 102 then compares the sampling result with the preset magnetic field parameters, generates a compensation current according to the comparison result, and supplies it to the quantization axis magnetic field coil 103 to make the parameters of the quantization axis magnetic field the same as the preset magnetic field parameters. For example, if the magnetic field value of the quantization axis magnetic field detected by the magnetic sensor 101 is less than the preset magnetic field value, the supplementary power supply circuit 102 will supply a corresponding positive current to the quantization axis magnetic field coil 103 to increase the magnetic field value of the quantization axis magnetic field to make it equal to the preset magnetic field value. If the magnetic field value of the quantization axis magnetic field detected by the magnetic sensor 101 is greater than the preset magnetic field value, the supplementary power supply circuit 102 will supply a corresponding negative current to the quantization axis magnetic field coil 103 to decrease the magnetic field value of the quantization axis magnetic field to make it equal to the preset magnetic field value

[0036] The power supply adjustment circuit of the quantization axis magnetic field coil in this embodiment includes a magnetic sensor and a supplementary power supply circuit. The magnetic sensor is arranged at the quantization axis magnetic field coil and is used to sample the magnetic field generated by the quantization axis magnetic field coil. The supplementary power supply circuit is respectively connected to both ends of the magnetic sensor and the quantization axis magnetic field coil, and is used to provide a corresponding compensation current to the quantization axis magnetic field coil according to the magnetic field sampling result of the magnetic sensor, realizing the power supply adjustment of the quantization axis magnetic field coil. The power supply adjustment introduces the sampling signal of the magnetic sensor as feedback, which can make the power supply compensation more accurate and improve the long-term accuracy of the hydrogen atomic clock.

[0037] Optionally, Figure 2 FIG. is a circuit schematic diagram of another power supply adjustment circuit for a quantization axis magnetic field coil provided by an embodiment of the present invention. On the basis of the foregoing embodiment, referring to Figure 2 , the magnetic sensor 101 is a magnetoresistive sensor. The supplementary power supply circuit 102 includes a bridge unit 201 and an amplification unit 202. The bridge unit 201 is connected to the magnetoresistive sensor and is used to generate a comparison pressure difference according to the resistance value difference between the real-time resistance of the magnetoresistive sensor and the preset resistance, where the preset resistance is equal to the resistance across the magnetoresistive sensor when the quantization axis magnetic field coil 103 generates a working magnetic field; the amplification unit 202 is connected to the bridge unit 201 and the quantization axis magnetic field coil 103, and is used to perform operational amplification on the comparison pressure difference to generate a compensation current and supply it to both ends of the quantization axis magnetic field coil 103.

[0038] Specifically, a magnetoresistive sensor is an electronic device that utilizes the characteristic of the resistance value of a material changing with an externally applied magnetic field to detect the magnetic field. The magnetoresistive sensor can be disposed near the quantization axis magnetic field coil 103, and its disposed position is fixed relative to the direction of the quantization axis magnetic field. The magnetoresistive sensor can sample the quantization axis magnetic field, and its resistance is related to the magnetic field value of the quantization axis magnetic field. Exemplarily, the magnetoresistive sensor can include a tunneling magnetoresistive sensor or a giant magnetoresistive sensor, and there is a linear correlation between its resistance and the magnetic field value of the quantization axis magnetic field.

[0039] One arm of the bridge unit 201 can be connected to the magnetoresistive sensor. The bridge unit 201 can utilize the bridge principle to convert the sampling resistance at both ends of the magnetoresistive sensor into a voltage signal. Exemplarily, the bridge unit 201 can include a Wheatstone bridge, and the Wheatstone bridge is powered by a power supply vc. The magnetoresistive sensor serves as one arm of the Wheatstone bridge.

[0040] The amplification unit 202 can perform differential detection on the voltage output by the bridge unit 201, compare the voltage output by the bridge unit 201 with a preset voltage, generate a corresponding electrical signal based on the comparison result, and further perform an amplification operation with a fixed ratio on this electrical signal to generate a compensation current supplied to the quantization axis magnetic field coil 103. Among them, the preset voltage corresponds to a preset magnetic field parameter. For example, the preset voltage can be determined according to experimental data and can be the voltage output by the bridge unit 201 when the magnetic field parameter of the quantization axis magnetic field is equal to the preset magnetic field parameter. Exemplarily, the amplification unit 202 includes a differential amplifier 203, an operational amplifier 204, and a power amplifier 205. The two input terminals of the differential amplifier 203 are connected to the two output terminals of the bridge unit 201. The operational amplifier 204 and the power amplifier 205 are sequentially disposed between the output terminal of the differential amplifier 203 and the quantization axis magnetic field coil 103 to achieve multi-stage precise amplification of the electrical signal corresponding to the comparison result, further improving the power supply accuracy of the quantization axis magnetic field coil 103.

[0041] In the power supply adjustment circuit of the quantization axis magnetic field coil provided in this embodiment, the magnetic sensor is a magnetoresistive sensor. The supplementary power supply circuit includes a bridge unit and an amplification unit. The bridge unit is connected to the magnetoresistive sensor and is used to generate a comparison pressure difference according to the resistance value difference between the real-time resistance of the magnetoresistive sensor and the preset resistance, where the preset resistance is equal to the resistance at both ends of the magnetoresistive sensor when the quantization axis magnetic field coil generates a working magnetic field. The amplification unit is connected to the bridge unit and the quantization axis magnetic field coil and is used to perform operational amplifier processing on the comparison pressure difference to generate a compensation current provided to both ends of the quantization axis magnetic field coil. The accurate sampling and processing of the quantization axis magnetic field are realized by using the magnetoresistive sensor and multi-stage amplifiers, further improving the power supply accuracy of the quantization axis magnetic field coil.

[0042] Optionally, Figure 3This is a circuit schematic diagram of another power supply adjustment circuit for a quantized axis magnetic field coil provided by an embodiment of the present invention. On the basis of the foregoing embodiment, with reference to Figure 3 , the magnetic sensor 101 is a fluxgate sensor, and the fluxgate sensor is used to generate a corresponding sensing electrical signal according to the magnetic field generated by the quantized axis magnetic field coil 103. The supplementary power supply circuit 102 includes an amplification unit 202. The amplification unit 202 is connected to the fluxgate sensor and is used to generate a compensation current according to the difference between the sensing electrical signal and a preset electrical signal ref and supply it to both ends of the quantized axis magnetic field coil 103, where the preset electrical signal ref is equal to the electrical signal generated by the fluxgate sensor when the quantized axis magnetic field coil 103 generates a working magnetic field.

[0043] Specifically, the fluxgate sensor is a sensor that measures the magnetic field based on the non-linear saturation characteristic of ferromagnetic materials. It has higher sensitivity and accuracy than Hall sensors and magnetoresistive sensors, and can further improve the sampling accuracy of the power supply adjustment circuit. The fluxgate sensor can be arranged near the quantized axis magnetic field coil 103, and its arrangement position is fixed relative to the direction of the quantized axis magnetic field. The fluxgate sensor can sample the quantized axis magnetic field and generate a corresponding electrical signal. Exemplarily, the fluxgate sensor can generate a current or voltage signal.

[0044] It should be particularly noted here that the transition spectral line frequency of the hydrogen atomic clock can be expressed by the first formula v = v0 + 2766×H 2 where v0 is the hyperfine energy level transition frequency when the external magnetic field is 0, and v0 = 1420405751.768 Hz. Taking the partial derivative of the first formula, the second formula can be obtained It can be seen from the second formula that the change in the output frequency of the hydrogen atomic clock caused by a slight change in the magnetic field is related to the magnetic field value H. The larger the magnetic field value H, the higher the stability requirement of the hydrogen atomic clock for the magnetic field value. Therefore, in order to make the magnetic sensitivity of the output frequency to the magnetic field small and reduce the stability requirement of the magnetic field, the magnetic field value H should not be taken as a large value. In this embodiment, a fluxgate sensor is used, and its sampling sensitivity can reach the pT level, which is much higher than that of ordinary magnetoresistive sensors. It can greatly improve the sampling accuracy and sensitivity of the power supply adjustment circuit 100 of the quantized axis magnetic field coil 103, and further improve the stability and accuracy of the hydrogen atomic clock.

[0045] The amplification unit 202 can perform differential detection on the electrical signal output by the fluxgate sensor, compare the electrical signal output by the fluxgate sensor with a preset electrical signal ref, generate a corresponding electrical signal based on the comparison result, and further perform an amplification operation with a fixed ratio on this electrical signal to generate a compensation current to supply the quantization axis magnetic field coil 103. Among them, the preset electrical signal ref corresponds to a preset magnetic field parameter. For example, the preset electrical signal ref can be determined according to experimental data and can be the voltage or current output by the fluxgate sensor when the magnetic field parameter of the quantization axis magnetic field is equal to the preset magnetic field parameter. Exemplarily, the amplification unit 202 includes a differential amplifier 203, an operational amplifier 204, and a power amplifier 205. One input terminal of the differential amplifier 203 is connected to the output terminal of the fluxgate sensor, and the other input terminal is connected to the preset electrical signal ref. The operational amplifier 204 and the power amplifier 205 are sequentially arranged between the output terminal of the differential amplifier 203 and the quantization axis magnetic field coil 103 to achieve multi-stage precise amplification of the electrical signal corresponding to the comparison result, further improving the power supply accuracy of the quantization axis magnetic field coil 103.

[0046] In the power supply adjustment circuit of the quantization axis magnetic field coil provided in this embodiment, the magnetic sensor is a fluxgate sensor, and the fluxgate sensor is used to generate a corresponding sensing electrical signal according to the magnetic field generated by the quantization axis magnetic field coil. The supplementary power supply circuit includes an amplification unit, and the amplification unit is connected to the fluxgate sensor and is used to generate a compensation current based on the difference between the sensing electrical signal and the preset electrical signal and supply it to both ends of the quantization axis magnetic field coil. Among them, the preset electrical signal is equal to the electrical signal generated by the fluxgate sensor when the quantization axis magnetic field coil generates a working magnetic field. The use of the fluxgate sensor and multi-stage operational amplifiers realizes more precise sampling and signal processing of the quantization axis magnetic field, further improving the power supply accuracy of the quantization axis magnetic field coil.

[0047] An embodiment of the present invention also provides a power supply circuit for a quantization axis magnetic field coil. Figure 4 Shown is a circuit schematic diagram of a power supply circuit for a quantization axis magnetic field coil provided in an embodiment of the present invention. Refer to Figure 4, the power supply circuit 400 of the quantization axis magnetic field coil 103 includes a main power supply circuit 401 and the power supply adjustment circuit 100 of the quantization axis magnetic field coil 103 in the foregoing embodiment. The main power supply circuit 401 includes a power supply vd, a voltage stabilizing chip 502, a current limiting resistor r1, a voltage stabilizing diode D1, and a voltage dividing resistor r2. The power supply vd is sequentially connected to the voltage stabilizing chip 502, the current limiting resistor r1, the voltage stabilizing diode D1, and grounded. The voltage dividing resistor r2 and the quantization axis magnetic field coil 103 are connected in series between the two ends of the voltage stabilizing diode D1. The output end of the supplementary power supply circuit 102 in the power supply adjustment circuit is respectively connected to the two ends of the quantization axis magnetic field coil 103, and the power supply adjustment circuit is used to provide a corresponding compensation current for the quantization axis magnetic field coil 103. The main power supply circuit 401 further includes a capacitor, and the capacitor is arranged between the two ends of the quantization axis magnetic field coil 103.

[0048] Specifically, the power supply vd refers to a device that can provide an electrical signal. Exemplarily, the voltage level provided by the power supply vd can be 9V. The voltage stabilizing chip 502 is a component that can generate a stable voltage signal of a preset voltage level according to the power supply vd. Exemplarily, the voltage stabilizing chip 502 can output a 5V stable voltage, and the voltage stabilizing chip 502 can select a linear voltage regulator such as an LM7805 voltage regulator.

[0049] The current limiting resistor r1 can adjust the magnitude of the current entering the quantization axis magnetic field coil 103. The voltage dividing resistor r2 can adjust the voltage value across the quantization axis magnetic field coil 103. The branch formed by the series connection of the voltage dividing resistor r2 and the quantization axis magnetic field coil 103 is connected between the two ends of the voltage stabilizing diode D1, and the voltage stabilizing diode D1 can stabilize the voltage value between the voltage dividing resistor r2 and the quantization axis magnetic field coil 103. Exemplarily, the voltage stabilizing diode D1 can be selected from the G2DW14A-18D series of silicon reference voltage stabilizing diodes D1. The anode of the voltage stabilizing diode D1 can be connected to the power supply end of the quantization axis magnetic field coil 103 through at least one voltage dividing resistor r2, and the cathode of the voltage stabilizing diode D1 can be connected to the ground end of the quantization axis magnetic field coil 103 through another at least one voltage dividing resistor r2. The capacitor is connected in parallel with the quantization axis magnetic field coil 103 and can reduce noise for the electrical signal entering the coil to further stabilize the voltage across the quantization axis magnetic field coil 103.

[0050] The power supply circuit of the quantization axis magnetic field coil provided in this embodiment includes a main power supply circuit and the power supply adjustment circuit of the quantization axis magnetic field coil in the foregoing embodiment. The main power supply circuit includes a power supply, a voltage stabilizing chip, a current limiting resistor, a voltage stabilizing diode, and a voltage dividing resistor. The power supply is sequentially connected to the voltage stabilizing chip, the current limiting resistor, the voltage stabilizing diode, and grounded. The voltage dividing resistor and the quantization axis magnetic field coil are connected in series between the two ends of the voltage stabilizing diode. The output end of the supplementary power supply circuit in the power supply adjustment circuit is respectively connected to the two ends of the quantization axis magnetic field coil, and the power supply adjustment circuit is used to provide a corresponding compensation current for the quantization axis magnetic field coil. The main power supply circuit further includes a capacitor, and the capacitor is arranged between the two ends of the quantization axis magnetic field coil, realizing stable power supply for the quantization axis magnetic field coil and power supply adjustment with feedback. This power supply adjustment method introduces the sampling signal of the magnetic sensor as feedback, which can make the power supply compensation more accurate and improve the long-term accuracy of the hydrogen atomic clock.

[0051] An embodiment of the present invention further provides a hydrogen atomic clock. Figure 5 It is a schematic diagram of the composition of a hydrogen atomic clock provided in an embodiment of the present invention. On the basis of the foregoing embodiment, with reference to Figure 5 , the hydrogen atomic clock 500 includes the power supply circuit 400 of the quantization axis magnetic field coil provided in the foregoing embodiment.

[0052] The hydrogen atomic clock, the power supply circuit of the coil, and the power supply adjustment circuit provided by the present invention, the power supply adjustment circuit includes a magnetic sensor and a supplementary power supply circuit. The magnetic sensor is arranged at the quantization axis magnetic field coil and is used to sample the magnetic field generated by the quantization axis magnetic field coil. The supplementary power supply circuit is respectively connected to the magnetic sensor and the two ends of the quantization axis magnetic field coil, and is used to provide a corresponding compensation current for the quantization axis magnetic field coil according to the magnetic field sampling result of the magnetic sensor, realizing the power supply adjustment of the quantization axis magnetic field coil. This power supply adjustment introduces the sampling signal of the magnetic sensor as feedback, which can make the power supply compensation more accurate and improve the long-term accuracy of the hydrogen atomic clock.

[0053] The above specific implementation manners do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A power supply adjustment circuit for a quantized axis magnetic field coil, characterized in that Applied to a hydrogen atomic clock, the power supply adjustment circuit of the quantization axis magnetic field coil includes: A magnetic sensor, disposed at the quantization axis magnetic field coil, for sampling the magnetic field generated by the quantization axis magnetic field coil; A supplementary power supply circuit, connected to both ends of the magnetic sensor and the quantization axis magnetic field coil respectively, for providing a corresponding compensation current to the quantization axis magnetic field coil according to the magnetic field sampling result of the magnetic sensor.

2. The power supply adjustment circuit of the quantized axial magnetic field coil according to claim 1, characterized in that, The magnetic sensor includes a magnetoresistive sensor and / or a fluxgate sensor.

3. The power supply adjustment circuit of the quantized axial magnetic field coil according to claim 2, characterized in that, The magnetic sensor is a magnetoresistive sensor; The supplementary power supply circuit includes a bridge unit and an amplification unit; the bridge unit is connected to the magnetoresistive sensor, and is used for generating a comparison pressure difference according to the resistance value difference between the real-time resistance of the magnetoresistive sensor and a preset resistance, wherein the preset resistance is equal to the resistance across the magnetoresistive sensor when the quantization axis magnetic field coil generates a working magnetic field; the amplification unit is connected to the bridge unit and the quantization axis magnetic field coil, and is used for performing operational amplification processing on the comparison pressure difference to generate the compensation current and providing it to both ends of the quantization axis magnetic field coil.

4. The power supply adjustment circuit of the quantized axial magnetic field coil according to claim 3, characterized in that, The bridge unit includes a Wheatstone bridge.

5. The power supply adjustment circuit of the quantized axial magnetic field coil according to claim 2, characterized in that, The magnetic sensor is a fluxgate sensor, and the fluxgate sensor is used for generating a corresponding sensing electrical signal according to the magnetic field generated by the quantization axis magnetic field coil; The supplementary power supply circuit includes an amplification unit, and the amplification unit is connected to the fluxgate sensor, and is used for generating the compensation current according to the difference between the sensing electrical signal and a preset electrical signal and providing it to both ends of the quantization axis magnetic field coil, wherein the preset electrical signal is equal to the electrical signal generated by the fluxgate sensor when the quantization axis magnetic field coil generates a working magnetic field.

6. The power supply adjustment circuit of the quantized axial magnetic field coil according to any one of claims 3-5, characterized in that, The amplification unit includes a differential amplifier.

7. The power supply adjustment circuit of the quantization axis magnetic field coil according to claim 6, characterized in that, The amplification unit further includes an operational amplifier and a power amplifier, and the operational amplifier and the power amplifier are sequentially disposed between the output end of the differential amplifier and the quantization axis magnetic field coil.

8. A power supply circuit for a quantization axis magnetic field coil, characterized in that, Including a main power supply circuit and the power supply adjustment circuit of the quantization axis magnetic field coil according to any one of claims 1-7; The main power supply circuit includes a power supply, a voltage stabilizing chip, a current limiting resistor, a voltage stabilizing diode, and a voltage dividing resistor; the power supply is sequentially connected to the voltage stabilizing chip, the current limiting resistor, and the voltage stabilizing diode to ground; the voltage dividing resistor and the quantization axis magnetic field coil are connected in series between both ends of the voltage stabilizing diode; The power supply adjustment circuit is respectively connected to both ends of the quantization axis magnetic field coil.

9. The power supply circuit of the quantization axis magnetic field coil according to claim 8, characterized in that The main power supply circuit further includes a capacitor, and the capacitor is disposed between both ends of the quantization axis magnetic field coil.

10. A hydrogen atomic clock, characterized in that, Including: The power supply circuit of the quantization axis magnetic field coil according to claim 8 or 9.

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