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Optronic infrared system with predictive maintenance in terms of the number of cycles before breakdown
Optronic infrared system with predictive maintenance in terms of the number of cycles before breakdown
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机译:光电式红外系统,可根据故障发生前的循环次数进行预测性维护
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摘要
The invention relates to an optronics system equipped with: a detector cooler having a cooling machine, a cryostat, an IR detector placed in the cryostat, and a sensor for measuring the temperature TD of the detector; and a processing card which includes means for servocontrolling the cooling machine according to the temperature TD. The system includes a sensor for sensing the system's internal temperature TS, and the processing card includes means for calculating: the refrigerating time (TMF) based on the temperatures TD and TS, on each on-off cycle of the detector cooler, the trend of the drift in the refrigerating time TMF, as a function of the number of on-off cycles of the detector cooler, a number of on-off cycles of the detector cooler before breakdown as a function of said trend of the drift of the TMF, and means for storing data used in said calculations; these data are aggregated data and not the measurements of temperatures TD and TS, nor said TMFs, in order to limit the size of the storage means.
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