續(xù)(二)
4.3 振動(dòng)步進(jìn)應(yīng)力試驗(yàn)
振動(dòng)步進(jìn)應(yīng)力是在環(huán)境溫度下+20°C進(jìn)行。
在測(cè)試的產(chǎn)品進(jìn)行振動(dòng)步進(jìn)應(yīng)力始終在設(shè)定點(diǎn)5GRMS的振動(dòng)值,增加5GRMS的增量,10分鐘的停留時(shí)間間隔。30GRMS后,振動(dòng)下降到5GRMS,以確定是否發(fā)生了故障,不在更高的振動(dòng)水平檢測(cè)。如果在這個(gè)共振振動(dòng)的檢測(cè)沒有故障,振動(dòng)增加到下一級(jí)。
振動(dòng)步進(jìn)應(yīng)力試驗(yàn):
Setpoint (Grms) | Functional Test Result (Pass/Fail) | Notes |
0 | Pass | Sample no.2 was applied in this test. |
5 | Pass |
|
10 | Pass |
|
15 | Pass |
|
20 | Pass |
|
25 | Pass |
|
30 | Pass |
|
5 | Pass |
|
35 | Pass |
|
5 | Pass |
|
40 | Pass |
|
5 | Pass |
|
50 | Pass |
|
5 | Pass |
|
55 | Pass |
|
5 | Pass |
|
60 | Pass |
|
5 | Pass |
|
65 | Pass |
|
5 | Pass |
|
70 | Pass | The LED light panel kept flashing and the functional test items were not able to check as the value kept changing, but the LED light panel still can function and the test kept going. |
5 | Pass |
|
75 | Pass | The vibration operating limit and destruct limit was found at >75 Grms. |
5 | Pass |
|
在測(cè)試LED驅(qū)動(dòng)器的過程中,在振動(dòng)臺(tái)記錄的GRMS的振動(dòng)水平。產(chǎn)品的響應(yīng)的測(cè)量帶寬是從20Hz到5000 Hz。測(cè)量結(jié)果總結(jié)在表9。功率譜密度圖在測(cè)量頻段的能量光譜分布都包含在附錄B,過低的設(shè)定點(diǎn)水平(5GRMS和75GRMS)。
4.4 綜合環(huán)境應(yīng)力試驗(yàn)
該系統(tǒng)經(jīng)過五次溫度循環(huán),從60℃至+ 110 °C,平均熱轉(zhuǎn)化率70°C/每分鐘結(jié)合振動(dòng)。振動(dòng)開始設(shè)定點(diǎn)在15 GRMS,每個(gè)熱循環(huán)增量為15 GRMS。在每個(gè)極端溫度的停留時(shí)間為10分鐘。綜合環(huán)境應(yīng)力試驗(yàn):
結(jié)束(三),續(xù)(四)。
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