The Tiny Space Debris Detectors

As expansion of human beings'activities in space areas, it has become an important part of astronautics to find out the space environment, exploit the space environment and secure spacecrafts. The continuing growth of the orbital debris population is now recognized world-wide as an environmental issue which must be better defined and addressed now to preserve near-Earth space for future generation. We introduce the distribution of the space debris in the LEO and the threaten of debris to the spacecrafts. Over the last decades, a number of technologies have been developed by the scientists for detection and measurement of the physical, chemical, and dynamical characteristics of dust and debris including ①impact-plasma detection utilizing thick and ultra-thin targets; ②charge induction in wires; ③impact-induced discharge in a metal-oxide-silicon (MOS) capacitor. In this, A new methods was introduced, which employed a polarized polyvinylidene fluoride polymer film(PVDF) and fast electronic pulse techniques. The advantages of ruggedness, no bias requirement, ease of large area sensor construction, and space reliability inherent in the PVDF dust sensors are well suited for a variety of dust and debris studies in space. The output of the fast electronic pulse techniques are used to analysis the mass of debris. Two sensors are placed in a time-of-flight (TOF) telescope, which is used measured the speed of the debris.