紅外地球敏感器擺動掃描機構(gòu)長壽命試驗方法

Methods of long-life test for swing scanning unit of infrared earth sensor

摘要: 針對擺動掃描式紅外地球敏感器，文章提出了一種長壽命試驗測試方法。設(shè)計擺動頻率為55～60 Hz的加速擺動掃描機構(gòu)模擬件，在正弦驅(qū)動信號的激勵下產(chǎn)生本征頻率附近的擺動，實現(xiàn)紅外地球敏感器擺動掃描機構(gòu)的加速壽命試驗；并研制了試驗平臺，實時記錄和分析試驗參數(shù)。試驗結(jié)果表明：長壽命試驗擺動掃描機構(gòu)模擬件在窄掃模式時，擺動次數(shù)累計1.4×109次，擺動頻率和電壓峰-峰值的標(biāo)準(zhǔn)差分別小于0.002 0 Hz、0.030 9 V。

Abstract: To test the life and reliability of swing scanning-type infrared earth sensors, an accelerated life test method is proposed. A sample set for simulating the swing scanning unit is designed, with swing frequency of 55～60 Hz. The stable amplitude oscillation is generated by a sine driving signal. A special test platform is developed, to record and analyze the test data automatically. The test results show that the standard deviation of the swing frequency is less than 0.002 0 Hz, and the standard deviation of the peak-to-peak voltage is less than 0.030 9 V.

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