CN111142053A - Digital measuring device based on rubidium spectrum light pump magnetometer - Google Patents
Digital measuring device based on rubidium spectrum light pump magnetometer Download PDFInfo
- Publication number
- CN111142053A CN111142053A CN201911362373.2A CN201911362373A CN111142053A CN 111142053 A CN111142053 A CN 111142053A CN 201911362373 A CN201911362373 A CN 201911362373A CN 111142053 A CN111142053 A CN 111142053A
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- magnetometer
- microprocessor
- circuit
- temperature
- rubidium
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0023—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration
Abstract
The invention discloses a digital measuring device based on a rubidium spectrum light pump magnetometer, which can improve the working stability of the magnetometer by adopting a microprocessor to control the heating process of the magnetometer according to the working temperature of the magnetometer, and simultaneously, the microprocessor controls a signal generator to generate a frequency sweeping signal required by the working of the magnetometer according to the measurement requirement, thereby improving the working efficiency of the magnetometer.
Description
Technical Field
The invention belongs to the technical field of magnetic field measurement, and particularly relates to a digital measuring device based on a rubidium spectrum lamplight pump magnetometer.
Background
Because the high-precision magnetic field measurement technology is inThe sensitivity of the magnetometer is continuously improved due to wide requirements of various fields. With the development of laser technology, atomic magnetometers have become the most sensitive means of measuring magnetic fields. The rubidium optical pump magnetometer is used for measuring an external magnetic field by utilizing the Zeeman effect of ultra-fine energy level under the action of the external magnetic field after rubidium atoms are excited. Irradiating rubidium atoms under the action of heating or electric excitation by light beams meeting energy level transition frequency, allowing the atoms to absorb light energy and transition from low energy level to high energy level, splitting the energy level of the rubidium atoms at the high energy level under a magnetic field, and allowing the energy difference between two adjacent energy levels of the split atoms to be within Zeeman transition frequency f0Is shown as f0The magnitude is proportional to the external magnetic field. Therefore, f is sought to be measured0The external magnetic field can be measured. However, in the prior art, the related parameters are mainly manually adjusted in the working process of the magnetometer for measurement, so that the problem of unstable working of the magnetometer caused by improper control of the working temperature of the magnetometer usually occurs, and thus, the measurement efficiency is not high and the measurement result is not accurate enough.
Disclosure of Invention
In view of this, the invention provides a digital measurement device based on a rubidium spectrum lamp light pump magnetometer, and the working parameters of the rubidium spectrum lamp light pump magnetometer are set by adopting a digital circuit, so that the high-efficiency and accurate measurement of the magnetometer is realized.
The invention provides a digital measuring device based on a rubidium spectrum lamplight pump magnetometer, which comprises a power module, a signal generator, a microprocessor, a heating module, a magnetometer, a temperature sensor and a computer, wherein the power module is used for generating a signal;
the power supply module provides power for the signal generator and the microprocessor; the signal generator provides a sweep frequency signal with set frequency and amplitude for the magnetometer under the control of the microprocessor; the temperature sensor is attached to the outer surface of the rubidium spectrum bulb of the magnetometer to measure the working temperature of the rubidium spectrum bulb, and the temperature sensor sends the working temperature to the microprocessor; the heating module heats a rubidium spectrum bulb in the magnetometer to a set temperature under the control of the microprocessor; the magnetometer sends the measured magnetic field value to the microprocessor;
and the microprocessor receives the instruction of the computer, determines the set frequency and amplitude according to the instruction of the computer, and sends the magnetic field value to the computer for processing.
Further, the heating module comprises an AD sampling circuit, a relay output circuit and a heating circuit, the AD sampling circuit is used for collecting the working temperature and the set temperature, and the relay output circuit is used for controlling the starting and stopping of the heating circuit; the heating circuit is used for heating the rubidium spectrum bulb and comprises a full-power heating circuit and a half-power heating circuit;
the heating module heats a rubidium spectrum bulb in the magnetometer to a set temperature under the control of the microprocessor in the following mode: when the working temperature is lower than the threshold value, the full-power heating circuit is started to heat the rubidium spectrum bulb to the upper limit temperature, the full-power heating circuit is closed to naturally cool the rubidium spectrum bulb, and when the working temperature is equal to the set temperature, the half-power heating circuit is started to heat.
Further, the microprocessor communicates with the computer through a serial port communication circuit.
Has the advantages that:
according to the invention, the microprocessor is adopted to control the heating process of the magnetometer according to the working temperature of the magnetometer, so that the working stability of the magnetometer can be improved, and meanwhile, the microprocessor controls the signal generator to generate a frequency sweeping signal required by the working of the magnetometer according to the measurement requirement, so that the working efficiency of the magnetometer is improved.
Drawings
Fig. 1 is a schematic structural diagram of a digital measuring device based on a rubidium spectrum light pump magnetometer.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides a digital measuring device based on a rubidium spectrum lamplight pump magnetometer, which comprises a power supply module, a signal generator, a microprocessor, a heating module, a magnetometer, a temperature sensor and a computer, wherein the signal generator is connected with the microprocessor through a connecting line, and the microprocessor is connected with the computer through a connecting line.
The power module can realize the conversion from 5V to 3.3V and provides power for the signal generator and the microprocessor. And the magnetometer sends the measured magnetic field value to the microprocessor. The temperature sensor is attached to the outer surface of the rubidium spectrum bulb of the magnetometer to measure the working temperature of the rubidium spectrum bulb, and the temperature sensor sends the measured working temperature to the microprocessor.
And the signal generator provides a frequency sweep signal with set frequency and amplitude for the magnetometer under the control of the microprocessor. The signal generator can be realized by adopting a direct digital frequency synthesis technology (DDS for short), for example, a digital direct frequency synthesizer AD9852 is adopted, the AD9852 is a highly integrated chip, the DDS technology is adopted to combine an internal high-speed and high-performance D/A converter and a comparator to form a programmable and flexible frequency synthesis function, when a microprocessor provides an accurate frequency clock source for the signal generator, the AD9852 generates a sine wave with high stability, programmable frequency and amplitude, and the sine wave signal can be used as a sweep frequency signal of a rubidium optical pump magnetometer system, for example, a 70-700k sine signal required by a stable output magnetometer.
The heating module heats a rubidium spectrum bulb in the magnetometer to a set temperature under the control of the microprocessor. Under the general condition, the heating module contains AD sampling circuit, relay output circuit and heating circuit, and AD sampling circuit is used for gathering the operating temperature and the settlement temperature of microprocessor output, and heating circuit includes full power heating circuit and half power heating circuit, according to the operating temperature who gathers, selects to start different heating circuit through relay output circuit, and concrete process is: when the working temperature is lower than the threshold value, the threshold value is 50 ℃ under the normal condition, the full-power heating circuit is started to heat the rubidium spectrum bulb to the upper limit temperature, the upper limit temperature is 100 ℃ under the normal condition, the full-power heating circuit is closed to naturally cool the rubidium spectrum bulb, and when the working temperature is equal to the set temperature, the half-power heating circuit is started to heat. Experiments show that the measured absorption peak curve is best when the temperature of the rubidium spectrum bulb is about 70 ℃, and the temperature of the rubidium spectrum bulb is kept about 70 ℃ by controlling the heating mode, so the temperature is normally set to be 70 ℃.
The microprocessor receives the instruction of the computer and determines the frequency and the amplitude of the frequency sweeping signal output by the signal generator according to the instruction of the computer; the microprocessor determines the set temperature of the rubidium spectrum bulb according to the received working temperature, and the microprocessor sends the magnetic field value to the computer for processing. In the invention, aiming at the high sensitivity requirement of a rubidium optical pump magnetometer and simultaneously considering both the hardware performance and the software requirement, a 32-bit high-performance ARM microcontroller STM32F103R8T6 (hereinafter referred to as STM32F103) produced by Italian Semiconductor (ST) company is selected, the microcontroller chip is based on a Cortex-M3 inner core, and the Cortex-M3 belongs to 32-bit processors of ARM7 series, so that the rubidium optical pump magnetometer has the advantages of low power consumption, high processing speed, high integration level, high clock frequency, low debugging cost and the like, and has 20 registers and 4 special function registers inside. The STM32F103 CAN reach 72MHZ with 64K on-chip Flash and 20K on-chip RAM, and the chip integrates multiple functions of up to 4 timers, two watchdog timers, 2 SPI interfaces, 3 UART interfaces, 1 USB interface, 1 CAN interface, 51 multifunctional bidirectional I/O interfaces and the like.
The microprocessor and the computer are communicated by a serial port communication circuit.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A digital measuring device based on a rubidium spectrum lamplight pump magnetometer is characterized by comprising a power module, a signal generator, a microprocessor, a heating module, a magnetometer, a temperature sensor and a computer;
the power supply module provides power for the signal generator and the microprocessor; the signal generator provides a sweep frequency signal with set frequency and amplitude for the magnetometer under the control of the microprocessor; the temperature sensor is attached to the outer surface of the rubidium spectrum bulb of the magnetometer to measure the working temperature of the rubidium spectrum bulb, and the temperature sensor sends the working temperature to the microprocessor; the heating module heats a rubidium spectrum bulb in the magnetometer to a set temperature under the control of the microprocessor; the magnetometer sends the measured magnetic field value to the microprocessor;
and the microprocessor receives the instruction of the computer, determines the set frequency and amplitude according to the instruction of the computer, and sends the magnetic field value to the computer for processing.
2. The device of claim 1, wherein the heating module comprises an AD sampling circuit, a relay output circuit and a heating circuit, the AD sampling circuit is used for collecting the working temperature and the set temperature, and the relay output circuit is used for controlling the starting and stopping of the heating circuit; the heating circuit is used for heating the rubidium spectrum bulb and comprises a full-power heating circuit and a half-power heating circuit;
the heating module heats a rubidium spectrum bulb in the magnetometer to a set temperature under the control of the microprocessor in the following mode: when the working temperature is lower than the threshold value, the full-power heating circuit is started to heat the rubidium spectrum bulb to the upper limit temperature, the full-power heating circuit is closed to naturally cool the rubidium spectrum bulb, and when the working temperature is equal to the set temperature, the half-power heating circuit is started to heat.
3. The apparatus of claim 1, wherein the microprocessor communicates with the computer via a serial communication circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911362373.2A CN111142053A (en) | 2019-12-26 | 2019-12-26 | Digital measuring device based on rubidium spectrum light pump magnetometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911362373.2A CN111142053A (en) | 2019-12-26 | 2019-12-26 | Digital measuring device based on rubidium spectrum light pump magnetometer |
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| CN111142053A true CN111142053A (en) | 2020-05-12 |
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| CN201911362373.2A Pending CN111142053A (en) | 2019-12-26 | 2019-12-26 | Digital measuring device based on rubidium spectrum light pump magnetometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112782620A (en) * | 2020-12-11 | 2021-05-11 | 兰州空间技术物理研究所 | Magnetic probe for optical pump atomic magnetometer |
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