Halogen tungsten lamp power supply for satellite radiation scaling

Abstract

The invention discloses a halogen tungsten lamp power supply used for on-satellite radiation scaling. The halogen tungsten lamp power supply comprises a halogen tungsten lamp, an operational amplifier, a field-effect transistor and a sampling resistor, wherein one end of the halogen tungsten lamp is connected to the power source, the other end of the halogen tungsten lamp is connected to the drainelectrode of the field-effect transistor, the source electrode of the field-effect transistor is connected to the first end of the sampling resistor, the second end of the sampling resistor is grounded, the in-phase input end of the operational amplifier is used for being connected with reference voltage, the antiphase input end of the operational amplifier is connected to the first end of the sampling resistor, the output end voltage of the operational amplifier is transmitted to the grid electrode of the field-effect transistor. A voltage-controlled current source structure with a feedbackloop is adopted, the structure current source does not generate switching noise, and high precision and high-stability radiation scaling light source is realized. The halogen tungsten lamp power supply is simple in circuit structure and high in reliability, the participation of a microcontroller and a pulse width modulator is not needed, and the hardware cost is low.

Description

technical field [0001] The invention relates to the technical field of spectral radiation calibration, in particular to a tungsten-halogen lamp power supply for on-board radiation calibration. Background technique [0002] Solar radiation is the most important external energy source for the earth. Using satellite payloads to accurately measure solar spectral radiation and monitor the impact of solar activity changes on solar spectral irradiance is of great significance to the study of atmospheric physics. In order to ensure the measurement accuracy and stability index requirements of the load, it is necessary to correct the long-term changes of the optical system and detectors. Regular on-orbit radiation calibration using high-precision and high-stability halogen tungsten lamps is the main means to solve this problem. , developing a tungsten-halogen lamp power supply for on-board radiometric calibration is the key to high-precision spectral radiometric calibration technology...

AI Technical Summary

Problems solved by technology

The tungsten-halogen lamp power supply designed with this technology has the advantages of high efficiency and low loss. However, since the field effect tube is working in the switching state, it will inevitably generate switching noise and cause electromagnetic interference problems. It is difficult to meet the high-precision radiation calibration requirements.

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