Panoramic imaging earth sensor
An earth sensor, panoramic imaging technology, applied in instruments, optics, integrated navigators, etc., can solve the problems of increasing volume, unable to meet the miniaturization, low power consumption, and increased power consumption of earth sensors, and achieves clear imaging, The effect of improving system feasibility and service life, low power consumption
Active Publication Date: 2012-02-15
ZHEJIANG UNIV
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The use of multiple sensors will increase power consumption and volume, which cannot meet the requirements of miniaturization and low power consumption of earth sensors
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[0033] The present invention will be described in detail below in conjunction with the embodiments and accompanying drawings, but the present invention is not limited thereto.
[0034] like figure 1 As shown, a panoramic imaging earth sensor includes: a panoramic looking optical lens, an image sensor, and a digital signal processing circuit. Among them, the 360° circular imaging of the panoramic surround-view optical lens captures the earth image and projects the earth image onto the imaging plane of the image sensor. The image sensor converts the earth image into an image data signal and outputs it to the back-end digital signal processing circuit. The digital signal The processing circuit processes the earth image data, and calculates the attitude information of the earth in the satellite coordinate system.
[0035] The above-mentioned panoramic surround-view optical lens is a multi-chip panoramic surround-view optical imaging lens, which uses front and rear lenses of differe...
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The invention discloses a panoramic imaging earth sensor, which comprises an optical system, an image sensor and a digital signal processing circuit, wherein panoramic annular lens are adopted in the optical system. The panoramic annular lens are used for 360-degree annular imaging and earth image capturing; the earth image is projected to an image plane of the image sensor and is then converted into a processible signal by the image sensor; the signal is output to the rear digital signal processing circuit for processing to calculate the center of the earth image and further calculate attitude information of the earth in a satellite coordinate system. The invention overcomes the restriction of small field of view in previous common earth sensors, and realizes imaging in 360-degree large field of view without the need of activity scanning parts, thus endowing the whole earth sensor provided by the invention with advantages of small volume and simple structure. In addition, different image sensors are adopted to realize different types of earth sensors with good flexibility and versatility.
Description
technical field [0001] The invention relates to the field of satellite attitude measurement equipment, in particular to a panoramic imaging earth sensor. Background technique [0002] The attitude control system is one of the most complex subsystems in the satellite. Its main task is to realize the pointing of the satellite in a specific space coordinate system, and it is generally composed of a sensor for measuring the attitude vector, an attitude control computer and execution components. At present, the attitude sensors widely used on satellites mainly include: sun sensors, magnetometers, gyroscopes, earth sensors, star sensors, etc. [0003] The earth sensor is one of the commonly used sensors in the satellite attitude determination system. Its function is to determine the vector direction of the center of the earth in the satellite coordinate system. The center of mass of the satellite is defined as the coordinate origin, the tangent direction along the orbit is the x...
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Login to View More IPC IPC(8): G01C21/24G02B13/06
Inventor 金仲和沈国权王昊白剑
Owner ZHEJIANG UNIV