Control circuit for chip atom magnetometer

Abstract

A main control unit of the control circuit is used for setting the temperature of a laser, the current and the temperature of an air chamber, and collecting signals of the magnetometer in real time; the control circuit comprises a voltage stabilizing circuit, a power amplifier circuit, a filter circuit, a current source circuit, an air cooling radiator and the like, and is responsible for providing a stable power supply, amplifying signals and suppressing noise. The chip atom magnetometer comprises a VCSEL laser, a micro-nano gas chamber, a photoelectric detector, an NTC negative feedback thermistor, a PT1000 platinum resistor and the like, and is used for magnetic field measurement. The temperature of the laser and the air chamber is adjusted through the main control unit, the control circuit modulates and amplifies temperature control signals through the power amplifier circuit, and stable work of the system is ensured. Traditional discrete equipment is replaced, the integration level and stability of the chip atom magnetometer are improved, the size is remarkably reduced, and the requirements for high precision, high sensitivity and miniaturization are met. The control circuit can realize low noise, accurate control and high stability, and has a wide application prospect.

Description

Technical Field

[0001] The present invention relates to the field of quantum sensing instrument control technology, and in particular to a control circuit for a chip-based atomic magnetometer. By modulating a heating drive signal to a high frequency band, it is beneficial to avoid the working frequency range of the magnetometer, thereby effectively avoiding the interference of low-frequency magnetic field noise on the measurement bandwidth, and ensuring the stability and accuracy of the precision measurement system. Background Art

[0002] Atomic magnetometers based on the principle of magneto-optical resonance, especially SERF (Spin-Exchange Relaxation-Free) magnetometers, have shown extremely high sensitivity in the field of magnetic field measurement. By increasing the density of alkali metal atoms and suppressing the spin exchange relaxation rate, SERF magnetometers can achieve higher magnetic field detection performance. The SERF atomic magnetometer constructed with micro-nano gas chambers not only has the advantages of low cost and high sensitivity due to its miniaturized design, but also shows great potential in commercial applications.

[0003] With the help of silicon-based optoelectronic chip technology, optical components and electronic components with various functions are integrated together, so that the atomic magnetometer can work in a smaller space while maintaining high precision and high sensitivity. The chip-based SERF atomic magnetometer is mainly composed of VCSEL (Vertical Cavity Surface Emitting Laser), micro-nano gas chamber and photodetector. At present, tasks such as laser driving, gas chamber temperature control and signal acquisition still rely on large discrete electronic measurement and control equipment. Although these devices can ensure the high-quality output of magnetometer signals, their large size limits the miniaturization and integrated application of chip-based atomic magnetometers.

[0004] Therefore, in order to meet the integration requirements of the chip-based atomic magnetometer, the integrated design of the electronic measurement and control system becomes the key to solving this problem. The design requires integrating the laser control, temperature control system, and data acquisition circuit into a circuit board to achieve low-noise, high-quality control and data processing. To this end, designing an efficient and stable control circuit to ensure the stable operation of the chip-based atomic magnetometer has become a key challenge to achieve integrated design and high-quality data acquisition. Summary of the invention

[0005] In view of the defects or shortcomings of the prior art, the present invention provides a control circuit for a chip-based atomic magnetometer. By modulating the heating drive signal to a high frequency band, it is beneficial to avoid the operating frequency range of the magnetometer, thereby effectively avoiding the interference of low-frequency magnetic field noise on the measurement bandwidth, thereby ensuring the stability and accuracy of the precision measurement system.

[0006] The technical solution of the present invention is as follows:

[0007] A control circuit for a chip-based atomic magnetometer, characterized in that it comprises a chip-based atomic magnetometer, wherein the chip-based atomic magnetometer is provided with a laser electric heating film, wherein a micro-nano gas chamber in the chip-based atomic magnetometer is provided with a PT1000 platinum resistor, a gas chamber electric heating film and a photoelectric detector, wherein the NTC negative feedback thermistor is connected to a first PID temperature feedback signal input end of a NIDAQ data acquisition processor through a first filter circuit, the VCSEL laser is connected to a first current control signal output end of the NIDAQ data acquisition processor through a current source circuit, the laser electric heating film is connected to an output end of a first multiplier through a first power amplifier circuit, and the first multiplier is connected to a first PID temperature feedback signal input end of a NIDAQ data acquisition processor through a first filter circuit, An input end is connected to the first temperature control signal output end of the NIDAQ data acquisition processor, the second input end of the first multiplier is connected to the function generator, the air chamber electric heating film is connected to the output end of the second multiplier through the second power amplifier circuit, the first input end of the second multiplier is connected to the second temperature control signal output end of the NIDAQ data acquisition processor, the second input end of the second multiplier is connected to the function generator, the PT1000 platinum resistor is connected to the second PID temperature feedback signal input end of the NIDAQ data acquisition processor through the second filtering circuit, and the photoelectric detector is connected to the magnetometer signal acquisition end of the NIDAQ data acquisition processor through the third filtering circuit.

[0008] A voltage stabilizing circuit and an air-cooled radiator are provided in a control circuit composed of each power amplifier circuit, current source circuit and each filter circuit. The voltage stabilizing circuit supplies power to the air-cooled radiator, each power amplifier circuit, current source circuit and each filter circuit respectively through an external 220V power supply, and the air-cooled radiator dissipates heat for each power amplifier circuit, current source circuit and each filter circuit.

[0009] Interfaces 6 to 17 of the chip-based atomic magnetometer are defined as follows: interface 6 is the laser temperature-controlled cathode, interface 7 is the laser temperature-controlled anode, interface 8 is the air-temperature-controlled cathode, interface 9 is the air-temperature-controlled anode, interface 10 is the laser current-controlled cathode, interface 11 is the laser current-controlled anode, interface 12 is the NTC thermistor cathode, interface 13 is the NTC thermistor anode, interface 14 is the PT1000 platinum resistor cathode, interface 15 is the PT1000 platinum resistor anode, interface 16 is the photodetector cathode, and interface 17 is the photodetector anode.

[0010] The first multiplier outputs the first sinusoidal modulation signal to the first power amplifier circuit, and the first power amplifier circuit outputs the first high-frequency sinusoidal temperature control signal to the laser electric heating film. The second multiplier outputs the second sinusoidal modulation signal to the second power amplifier circuit, and the second power amplifier circuit outputs the second high-frequency sinusoidal temperature control signal to the air chamber electric heating film.

[0011] The VCSEL laser emits laser to pump alkali metal atoms in the micro-nano air chamber, and the photodetector is used to detect the intensity of light after passing through the micro-nano air chamber, and the magnetic field is measured based on the principle of magneto-optical resonance.

[0012] The voltage stabilizing circuit adopts an efficient low-noise voltage stabilizing chip to ensure that the interference of the power supply to the control signal is minimized, thereby ensuring the stability and accuracy of the laser and gas chamber temperature control signals.

[0013] Each filter circuit is used to perform noise suppression and frequency filtering on the signal.

[0014] The air chamber electric heating film is a 2 N The distance between the electrodes of the heating film is N, which is a positive integer.

[0015] The advantages of the present invention compared with the prior art are:

[0016] (1) The present invention uses a circuit board to replace the traditional discrete and bulky electronic measurement and control system, and connects the chip-based atomic magnetometer and NIDAQ through the control circuit, which can better integrate the chip-based atomic magnetometer and improve the practical application capability of magnetic field measurement.

[0017] (2) The present invention takes into account circuit noise and power supply fluctuations, designs a voltage stabilizing circuit for each circuit on the circuit board, and designs a certain filtering circuit, which can effectively isolate electrical noise and reduce signal distortion.

[0018] (3) The present invention avoids the working frequency range of the magnetometer by modulating the heating drive signal to a high frequency band, thereby effectively avoiding the interference of low-frequency magnetic field noise on the measurement bandwidth and ensuring the stability and accuracy of the precision measurement system.

[0019] (4) The present invention takes into account the impact of heat generated by chip operation on the operation of the circuit board and designs a special air-cooled heat sink to cool the chip that generates more heat in the circuit to ensure stable operation of the circuit.

[0020] (5) The present invention adopts NIDAQ to connect the control circuit to perform data acquisition, logic operation, and control signal output, and has high precision, high speed, multi-channel support and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a schematic diagram of a control circuit for a chip-based atomic magnetometer. Figure 11 is the main control unit or NIDAQ data acquisition processor (NIDAQ, National Instruments Data Acquisition, whose input end is connected to the filter circuit in the control circuit and outputs the temperature / current control signal), 2 is the first multiplier (modulates the temperature control signal to high frequency), 3 is the first sinusoidal modulation signal, and 4 is the first high-frequency sinusoidal temperature control signal. Figure 1 The invention comprises a main control unit, a control circuit and a chip-based atomic magnetometer. The chip-based atomic magnetometer comprises an NTC negative feedback thermistor (NTC-Negative Temperature Coefficient thermistor), a VCSEL laser (Vertical-Cavity Surface-Emitting Laser), a laser electric heating film, an air chamber electric heating film, a micro-nano air chamber, a PT1000 platinum resistor (PT1000 is a specification model), and a photodetector. The control circuit comprises a first filtering circuit, a current source circuit, a first power amplifier circuit, a second power amplifier circuit, a second filtering circuit and a third filtering circuit. An air-cooled radiator is arranged in the control circuit. The air-cooled radiator is connected to a 220V power supply through a voltage stabilizing circuit. The air-cooled radiator dissipates heat for each power amplifier circuit, and each circuit of the voltage stabilizing circuit provides power. The main control unit adopts a NIDAQ data acquisition processor (NIDAQ, National Instruments Data Acquisition, whose input end is connected to the filter circuit in the control circuit, and outputs a temperature / current control signal to the multiplier and the current source circuit), the current source circuit is connected to the VCSEL laser, the multiplier is connected to the function generator, the first multiplier outputs the first sinusoidal modulation signal to the first power amplifier circuit, the first power amplifier circuit outputs the first high-frequency sinusoidal temperature control signal to the laser electric heating film, the second multiplier outputs the second sinusoidal modulation signal to the second power amplifier circuit, the second power amplifier circuit outputs the second high-frequency sinusoidal temperature control signal to the air chamber electric heating film, the first filter circuit transmits the PID feedback temperature signal from the NTC negative feedback thermistor to the NIDAQ data acquisition processor, the second filter circuit transmits the PID feedback temperature signal from the PT1000 platinum resistor to the NIDAQ data acquisition processor, and the third filter circuit transmits the magnetometer output signal from the photodetector to the NIDAQ data acquisition processor.

[0022] Figure 2 yes Figure 1 Schematic diagram of the interface structure of the chip-based atomic magnetometer. Figure 2 Figure 5 is a chip-based atomic magnetometer. Figure 2The definitions of interfaces 6 to 17 are as follows: 6-laser temperature-controlled cathode; 7-laser temperature-controlled anode; 8-air-temperature temperature-controlled cathode; 9-air-temperature temperature-controlled anode; 10-laser current-controlled cathode; 11-laser current-controlled anode; 12-NTC thermistor cathode; 13-NTC thermistor anode; 14-PT1000 platinum resistor cathode; 15-PT1000 platinum resistor anode; 16-photodetector cathode; 17-photodetector anode. DETAILED DESCRIPTION

[0023] Below is the attached figure ( Figure 1-Figure 2 ) and Examples illustrate the present invention.

[0024] Figure 1 The present invention is a schematic diagram of a control circuit for a chip-based atomic magnetometer. Figure 2 yes Figure 1 Schematic diagram of the interface structure of the chip-based atomic magnetometer. Figure 1 to Figure 2 As shown, a control circuit for a chip-based atomic magnetometer comprises a chip-based atomic magnetometer, wherein the chip-based atomic magnetometer is provided with a laser electric heating film, wherein the micro-nano gas chamber in the chip-based atomic magnetometer is provided with a PT1000 platinum resistor, a gas chamber electric heating film and a photoelectric detector, wherein the NTC negative feedback thermistor is connected to a first PID temperature feedback signal input end of a NIDAQ data acquisition processor 1 through a first filter circuit, wherein the VCSEL laser is connected to a first current control signal output end of the NIDAQ data acquisition processor through a current source circuit, wherein the laser electric heating film is connected to an output end of a first multiplier 2 through a first power amplifier circuit, wherein a first multiplier 2 The input end is connected to the first temperature control signal output end of the NIDAQ data acquisition processor 1, the second input end of the first multiplier 2 is connected to the function generator, the air chamber electric heating film is connected to the output end of the second multiplier through the second power amplifier circuit, the first input end of the second multiplier is connected to the second temperature control signal output end of the NIDAQ data acquisition processor, the second input end of the second multiplier is connected to the function generator, the PT1000 platinum resistor is connected to the second PID temperature feedback signal input end of the NIDAQ data acquisition processor through the second filtering circuit, and the photoelectric detector is connected to the magnetometer signal acquisition end of the NIDAQ data acquisition processor through the third filtering circuit.

[0025] A voltage stabilizing circuit and an air-cooled radiator are provided in the control circuit composed of each power amplifier circuit, current source circuit and each filter circuit. The voltage stabilizing circuit supplies power to the air-cooled radiator, each power amplifier circuit, current source circuit and each filter circuit respectively through an external 220V power supply, and the air-cooled radiator dissipates heat for each power amplifier circuit, current source circuit and each filter circuit. Interfaces 6 to 17 of the chip-based atomic magnetometer are defined as follows: Interface 6 is the laser temperature-controlled cathode, Interface 7 is the laser temperature-controlled anode, Interface 8 is the air-temperature controlled cathode, Interface 9 is the air-temperature controlled anode, Interface 10 is the laser current-controlled cathode, Interface 11 is the laser current-controlled anode, Interface 12 is the NTC thermistor cathode, Interface 13 is the NTC thermistor anode, Interface 14 is the PT1000 platinum resistor cathode, Interface 15 is the PT1000 platinum resistor anode, Interface 16 is the photodetector cathode, and Interface 17 is the photodetector anode.

[0026] The first multiplier outputs the first sinusoidal modulation signal 3 to the first power amplifier circuit, the first power amplifier circuit outputs the first high-frequency sinusoidal temperature control signal 4 to the laser electric heating film, the second multiplier outputs the second sinusoidal modulation signal to the second power amplifier circuit, the second power amplifier circuit outputs the second high-frequency sinusoidal temperature control signal to the air chamber electric heating film. The VCSEL laser emits laser to pump the alkali metal atoms in the micro-nano air chamber, the photodetector is used to detect the light intensity after passing through the micro-nano air chamber, and the magnetic field is measured based on the principle of magneto-optical resonance. The voltage stabilizing circuit uses an efficient low-noise voltage stabilizing chip to ensure that the power supply minimizes the interference with the control signal, thereby ensuring the stability and accuracy of the laser and air chamber temperature control signals. Each filter circuit is used to suppress noise and filter the frequency of the signal. The air chamber electric heating film is a 2 N The distance between the electrodes of the heating film is N, which is a positive integer.

[0027] The invention discloses a control circuit for a chip-based atomic magnetometer. The whole device includes a main control unit, a control circuit and a chip-based atomic magnetometer. The main control unit includes a NIDAQ system, a data acquisition card and a function generator, which are used to set the laser temperature, current and gas chamber temperature, and collect magnetometer signals in real time. The control circuit includes a voltage stabilizing circuit, a power amplifier circuit, a filter circuit, a current source circuit and an air-cooled radiator, which are responsible for providing a stable power supply, signal amplification and noise suppression. The chip-based atomic magnetometer includes a VCSEL laser, a micro-nano gas chamber, a photodetector, an NTC negative feedback thermistor and a PT1000 platinum resistor, which are used for magnetic field measurement. The temperature of the laser and the gas chamber is adjusted by the main control unit, and the control circuit modulates and amplifies the temperature control signal through the power amplifier circuit to ensure stable operation of the system. The filter circuit effectively reduces electrical noise and ensures the accuracy of signal acquisition. The invention adopts an integrated design to replace traditional discrete equipment, improves the integration and stability of the chip-based atomic magnetometer, significantly reduces the system volume, and meets the requirements of high precision, high sensitivity and miniaturization of the chip-based atomic magnetometer. The control circuit can achieve low noise, precise control and high stability, is suitable for the field of magnetic field measurement, and has broad application prospects.

[0028] A control circuit for a chip-based atomic magnetometer comprises a main control unit, a control circuit and a chip-based atomic magnetometer, wherein the main control unit is used for laser temperature setting, laser control current setting, gas chamber temperature setting, temperature control PID parameter setting, real-time temperature reading and magnetometer signal acquisition; the control circuit comprises a power amplifier circuit and a filter circuit, wherein the power amplifier circuit is used for amplifying the output signal of the main control unit, and the filter circuit is used for performing noise suppression and frequency filtering on the signal, and the chip-based atomic magnetometer performs magnetic field signal measurement based on the magneto-optical resonance principle.

[0029] The main control unit includes a NI device, a data acquisition card and a function generator. The NI device is used to connect the data acquisition card and the function generator. The data acquisition card is used to collect temperature control signals and magnetometer signals. The function generator is used to modulate the temperature control signal, generate a high-frequency temperature control signal and connect the control circuit.

[0030] The control circuit includes a voltage stabilizing circuit, an air-cooled heat sink, and a current source circuit. The voltage stabilizing circuit is used to keep the voltage stable when the input voltage fluctuates or the load changes. The air-cooled heat sink is used to cool the circuit components that generate heat during operation. The current source circuit is used to provide a stable current for the laser.

[0031] The chip-based atomic magnetometer includes a VCSEL laser, a micro-nano gas chamber, a photodetector, an NTC negative feedback thermistor, a PT1000 platinum resistor, a laser electric heating film and a gas chamber electric heating film. The NTC negative feedback thermistor and the PT1000 platinum resistor are used to detect the temperature of the laser and the gas chamber respectively.

[0032] The control circuit integrates functions such as laser control, temperature control and signal acquisition into one circuit board through an integrated design, thereby significantly reducing the system volume and facilitating the convenient integration and application of the chip-based atomic magnetometer.

[0033] The control circuit adopts special thermal management technology, including air-cooled heat sink and heat dissipation design, which effectively solves the problem of heat generated during operation and avoids the influence of overheating on the circuit, thereby improving the long-term stability and reliability of the circuit.

[0034] The voltage stabilizing circuit adopts an efficient low-noise voltage stabilizing chip to ensure that the interference of the power supply to the control signal is minimized, thereby ensuring the stability and accuracy of the laser and gas chamber temperature control signals.

[0035] In view of the defects or shortcomings of the prior art, the present invention provides a control circuit for a chip-based atomic magnetometer, which realizes circuit control of the chip-based atomic magnetometer through a host computer program. The control circuit can provide a highly stable operating temperature and read high-quality magnetometer output signals to solve the problems raised in the background technology.

[0036] The technical solution of the present invention is: a control circuit for a chip-based atomic magnetometer, comprising a main control unit, a control circuit, and a chip-based atomic magnetometer; the main control unit is used for laser temperature setting, laser control current setting, gas chamber temperature setting, temperature control PID (Proportion Integral Derivative) parameter setting, real-time temperature reading, and magnetometer signal acquisition; the control circuit mainly realizes two functions, on the one hand, providing a power amplification function for the output signal of the main control unit, and on the other hand, providing a filtering function for the chip-based atomic magnetometer signal acquisition; the chip-based atomic magnetometer performs magnetic field signal measurement based on the magneto-optical resonance principle.

[0037] Furthermore, the main control unit includes NIDAQ (National Instruments Data Acquisition), a data acquisition card and a function generator, which are a series of hardware and software tools developed by National Instruments (National Instruments Corporation) for collecting analog signals, digital signals and other forms of data. The NIDAQ is used to connect the data acquisition card and the function generator, the data acquisition card is used to collect temperature control signals and magnetometer signals, and the function generator is used to modulate the temperature control signal generated by the NIDAQ to generate a high-frequency temperature control signal and connect the control circuit.

[0038] Furthermore, the control circuit includes a voltage stabilizing circuit, an air-cooled radiator, a filtering circuit, a power amplifier circuit, and a current source circuit. The voltage stabilizing circuit can maintain a stable output voltage when the input voltage fluctuates or the load changes, and provide voltage drive for the air-cooled radiator and other circuits in the control circuit. The air-cooled radiator conducts the heat generated by other circuit chips when they are working, ensuring that the equipment operates stably within a safe temperature range. The filtering circuit suppresses unnecessary frequency components from the signal, reads low-noise temperature signals and magnetometer signals, and the power amplifier circuit amplifies the power of the input signal to drive the load, driving the high-frequency temperature control signal power amplification control heating film of the main control unit. The current source circuit provides a stable current for the laser, and the output current does not depend on the load impedance change, and is used to drive the laser.

[0039] Furthermore, the chip-based atomic magnetometer includes a VCSEL laser, a micro-nano gas chamber, a photodetector, an NTC (Negative Temperature Coefficient) negative feedback thermistor, a PT1000 (resistance is 1000Ω at 0°C) platinum resistor, a laser electric heating film, and an air chamber electric heating film. The VCSEL laser is a vertical cavity surface emitting laser. The micro-nano gas chamber contains alkali metal atoms, inert gas, quenching gas, etc., which provide an environment for the magneto-optical resonance process. The photodetector is used to detect the change in light intensity after the interaction between light and alkali metal atoms, and output a magnetometer signal. The NTC negative feedback thermistor is a resistor with a negative temperature coefficient, which is used to detect the temperature of the VCSEL laser. The PT1000 platinum resistor is a high-precision platinum thermal resistor temperature sensor, which is used to detect the temperature of the micro-nano gas chamber. The air chamber electric heating film is a 2 N Polar distance heating film is used to heat the micro-nano gas chamber.

[0040] like Figure 1As shown: The present invention is a control circuit for a chip-based atomic magnetometer, comprising a main control unit, a control circuit, and a chip-based atomic magnetometer. The main control unit is provided with a NIDAQ (1) and a function generator, which are used to set the laser temperature and current, set the gas chamber temperature, observe the laser and gas chamber temperature curves, set the heating PID parameters, and read the magnetometer output signal. The control circuit comprises a power amplifier circuit, a filter circuit, a current source circuit, a voltage stabilizing circuit, and an air-cooled heat sink, wherein the power amplifier circuit is connected to the high-frequency temperature signal modulated by the main control unit, and the high-frequency temperature signal is multiplied (2) by the temperature control signal and the sinusoidal modulation signal (3). After power amplification, the high-frequency sinusoidal temperature control signal (4) is respectively input into the laser electric heating film and the gas chamber heating film to drive the heating VCSEL laser and the gas chamber. The filter circuit is a low-pass filter circuit and a band-pass filter circuit. The low-pass filter circuit is respectively connected to the NTC negative feedback thermistor and the PT1000 platinum resistor. The band-pass filter is connected to the photodetector. The read signal is transmitted to the NIDAQ operation The current source circuit provides a constant current and drives the VCSEL laser with a precise current. The chip-based atomic magnetometer includes an NTC negative feedback thermistor, a VCSEL laser, a laser electric heating film, an air chamber electric heating film, a micro-nano air chamber, a PT1000 platinum resistor, and a photodetector. The NTC negative feedback thermistor and the laser electric heating film are used to heat the laser and detect the temperature. The PT1000 platinum resistor and the air chamber electric heating film are used to heat the air chamber and detect the temperature. The VCSEL laser emits laser to pump the alkali metal atoms in the micro-nano air chamber. The photodetector is used to detect the light intensity after passing through the air chamber. The magnetic field is measured based on the principle of magneto-optical resonance.

[0041] like Figure 2 As shown, the chip-based atomic magnetometer is connected to a control circuit. The chip-based atomic magnetometer (5) includes a VCSEL laser, a micro-nano gas chamber, a photodetector, a heating film and a temperature measuring resistor. The control circuit is connected as follows: the laser temperature control cathode (6) and the laser temperature control anode (7) are connected to a power amplifier circuit to input a high-frequency amplified temperature control signal to the laser electric heating film. The air temperature temperature control cathode (8) and the air temperature temperature control anode (9) are connected to a power amplifier circuit to input a high-frequency amplified temperature control signal to the gas chamber electric heating film. The laser current control cathode (10) and the laser current control anode (11) are connected to a current source circuit to accurately drive the laser to work. The NTC thermistor cathode (12) and the NTC thermistor anode (13) are connected to a filter circuit to collect the laser temperature. The PT1000 platinum resistor cathode (14) and the PT1000 platinum resistor anode (15) are connected to a filter circuit to collect the gas chamber temperature. The photodetector cathode (16) and the photodetector anode (17) are connected to a filter circuit to collect the magnetometer output signal.

[0042] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in the field. It is pointed out here that the above description helps those skilled in the art to understand the invention, but does not limit the protection scope of the invention. Any equivalent replacement, modification and / or simplification of the above description without departing from the essence of the invention falls within the protection scope of the invention.

Claims

1. A control circuit for a chip-based atomic magnetometer, characterized in that: The invention comprises a chip-based atomic magnetometer, wherein the chip-based atomic magnetometer is provided with a laser electric heating film, wherein the micro-nano gas chamber in the chip-based atomic magnetometer is provided with a PT1000 platinum resistor, a gas chamber electric heating film and a photoelectric detector, wherein the NTC negative feedback thermistor is connected to a first PID temperature feedback signal input end of a NIDAQ data acquisition processor through a first filter circuit, the VCSEL laser is connected to a first current control signal output end of the NIDAQ data acquisition processor through a current source circuit, the laser electric heating film is connected to an output end of a first multiplier through a first power amplifier circuit, and a first input end of the first multiplier is connected to the NIDAQ The first temperature control signal output end of the NIDAQ data acquisition processor, the second input end of the first multiplier is connected to the function generator, the air chamber electric heating film is connected to the output end of the second multiplier through the second power amplifier circuit, the first input end of the second multiplier is connected to the second temperature control signal output end of the NIDAQ data acquisition processor, the second input end of the second multiplier is connected to the function generator, the PT1000 platinum resistor is connected to the second PID temperature feedback signal input end of the NIDAQ data acquisition processor through the second filtering circuit, and the photoelectric detector is connected to the magnetometer signal acquisition end of the NIDAQ data acquisition processor through the third filtering circuit.

2. The control circuit for a chip-based atomic magnetometer according to claim 1, characterized in that: A voltage stabilizing circuit and an air-cooled radiator are provided in a control circuit composed of each power amplifier circuit, current source circuit and each filter circuit. The voltage stabilizing circuit supplies power to the air-cooled radiator, each power amplifier circuit, current source circuit and each filter circuit respectively through an external 220V power supply, and the air-cooled radiator dissipates heat for each power amplifier circuit, current source circuit and each filter circuit.

3. The control circuit for a chip-based atomic magnetometer according to claim 1, characterized in that: Interfaces 6 to 17 of the chip-based atomic magnetometer are defined as follows: interface 6 is the laser temperature-controlled cathode, interface 7 is the laser temperature-controlled anode, interface 8 is the air-temperature-controlled cathode, interface 9 is the air-temperature-controlled anode, interface 10 is the laser current-controlled cathode, interface 11 is the laser current-controlled anode, interface 12 is the NTC thermistor cathode, interface 13 is the NTC thermistor anode, interface 14 is the PT1000 platinum resistor cathode, interface 15 is the PT1000 platinum resistor anode, interface 16 is the photodetector cathode, and interface 17 is the photodetector anode.

4. The control circuit for a chip-based atomic magnetometer according to claim 1, characterized in that: The first multiplier outputs the first sinusoidal modulation signal to the first power amplifier circuit, and the first power amplifier circuit outputs the first high-frequency sinusoidal temperature control signal to the laser electric heating film. The second multiplier outputs the second sinusoidal modulation signal to the second power amplifier circuit, and the second power amplifier circuit outputs the second high-frequency sinusoidal temperature control signal to the air chamber electric heating film.

5. The control circuit for a chip-based atomic magnetometer according to claim 1, characterized in that: The VCSEL laser emits laser to pump alkali metal atoms in the micro-nano air chamber, and the photodetector is used to detect the intensity of light after passing through the micro-nano air chamber, and the magnetic field is measured based on the principle of magneto-optical resonance.

6. The control circuit for a chip-based atomic magnetometer according to claim 1, characterized in that: The voltage stabilizing circuit adopts an efficient low-noise voltage stabilizing chip to ensure that the interference of the power supply to the control signal is minimized, thereby ensuring the stability and accuracy of the laser and gas chamber temperature control signals.

7. The control circuit for a chip-based atomic magnetometer according to claim 1, characterized in that: Each filter circuit is used to perform noise suppression and frequency filtering on the signal.

8. The control circuit for a chip-based atomic magnetometer according to claim 1, characterized in that: The air chamber electric heating film is a 2 N The distance between the electrodes of the heating film is N, which is a positive integer.

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