JPH0321717U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of this invention, FIG. 2 is a sectional view of the detection unit, FIG. 3 is a diagram showing the relationship between scanning lines and pulses generated from the infrared detector and the photodetector, and FIG. Figure 4 shows the rotation of the detection unit, Figure 5 shows how the scanning line changes relative to the target when the detection unit rotates, and Figure 6 shows the operating principle of the image analysis device. Figure 7 shows one of the images obtained by the image analysis device.
A diagram showing an example, FIG. 8 is a diagram explaining the operation of the solar direction analysis device, FIG. 9 is a diagram showing the relationship between the obtained angle and the sun direction, and FIG. 10 is a diagram showing the principle of operation of a conventional sun sensor. , FIG. 11 is a diagram showing the arrangement of a conventional solar sensor. Further, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a solar direction detection device mounted on a spacecraft for detecting the direction of the sun, an infrared detection means for detecting an infrared image of a target from infrared rays emitted by a target such as the earth; A sunlight reflection image detection means detects a sunlight reflected image of the target from the sunlight reflected by the target, and an infrared image of the target detected by the infrared image detection means and an infrared image of the target detected by the sunlight reflection image detection means. A solar direction detection device comprising: solar direction analysis means for analyzing the direction of the sun by inputting a sunlight reflected image of a target object. (2) Detect the center and diameter of the target from the infrared image input as a solar direction analysis means, and use the obtained center of the target and sunlight reflection image to find the closest point to the sun through the center of the target. Detect a straight line such that the part where reflected light is detected is longer, and calculate the slope of this straight line and
Utility model registration claim (1), characterized in that the direction of the sun is analyzed based on the ratio of the length of the part of the straight line where the sun's reflected light is detected and the diameter of the target object. The described solar direction detection device. (3) The infrared image detection means and the sunlight reflected image detection means detect a mirror that vibrates at a constant amplitude relative to a target object, an infrared detector that detects infrared rays from the target object, and sunlight reflected from the target object. a half mirror that separates the infrared rays emitted by a target reflected by a vibrating mirror and the sunlight reflected by the target into an infrared detector and a photodetector; a vibrating mirror, an infrared detector, and a photodetector; The infrared image of the target and the sunlight are obtained from the rotating table on which the half mirror and the half mirror are placed, the stepping motor that drives it, the detection signal from the infrared detector, the detection signal from the photodetector, and the angle signal from the stepping motor. The solar direction detection device according to claim (1) of the utility model registration, characterized in that it is realized by an image analyzer that detects a reflected image.