Reliability Design Technology of Lighting Products

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Reliability design technology for lighting products
Reliability design technology for lighting products
Reliability design technology, as the name implies, is a test technology to check whether the product is reliable when used by users. The success or failure of this test technology has a decisive effect on the quality of the product, and it is implemented throughout the design and production process of the product.
When an indoor lighting product is designed, how long is its service life? In what harsh environment (such as high temperature, low temperature and vibration, etc.) can it operate? The manufacturer must first have a clear idea through experiments. Then, write the key points of use into the instructions to remind users of some precautions to avoid users damaging the product due to improper operation. The following is a brief introduction to some reliability test methods and projects.
The reliability test projects of lighting products mainly include: A: high temperature test B: high temperature and high pressure impact start-up test C: low temperature test D: low temperature and high pressure impact start-up test E: vibration test F: life test G: aging test H: small test I: pilot test. The following introduces the application of these projects. (Take the rated voltage of 220V as an example) Some of the equipment needs to be homemade.
A: High temperature test.
Main test equipment: thermostat, thermometer, voltage regulator, voltmeter and clock.
Main test items: high temperature and low voltage start-up, high temperature and safe operation.
Test quantity: 10.
Test method: put the lamp to be tested into the thermostat, connect the circuit, adjust the output voltage of the voltage regulator to 180V (the voltage regulator only supplies power to the lamp to be tested), turn on the power of the thermostat, set the temperature to 60℃, turn on the power of the lamp when the temperature in the box rises to 60℃, observe whether the lamp works normally, then increase the voltage regulator to 250V, let it work for 24 hours, and observe the experimental results. If abnormal phenomena such as lamp damage and material deformation due to heat occur, the experiment is unqualified.
B: High temperature and high pressure impact start-up test.
Main test equipment: thermostat, thermometer, voltage regulator, voltmeter and clock.
Main test items: high temperature start-up performance and reliability
test quantity: 10.
Test method: continue with the previous test. Under high temperature conditions, adjust the voltage of the voltage regulator to 250V, switch it on and off three times, with an interval of no less than 8 seconds each time (the interval of 8 seconds is to wait for the capacitors in the lamp to be fully discharged to reduce mutual interference). During this process, the lamp should not be damaged, otherwise it will be considered unqualified.
C: Low temperature test.
Main test equipment: low temperature box, thermometer, voltage regulator, voltmeter and clock.
Main test items: low temperature and low voltage start.
Test quantity: 10.
Test method: put the lamp to be tested into the low temperature box, connect the circuit, adjust the output voltage of the voltage regulator to 180V (the voltage regulator only supplies power to the lamp to be tested), turn on the power of the low temperature box, set the temperature to -15℃, and keep it for 2 hours when the temperature in the box drops to -15℃. After the lamp is fully cooled, turn on the power of the lamp and observe the experimental results. If abnormal phenomena such as lamp damage and inability to start occur, the experiment is unqualified.
D: Low temperature and high voltage impact start test.
Main test equipment: low temperature box, thermometer, voltage regulator, voltmeter and clock.
Main test items: Low temperature and high voltage impact reliability
test Quantity: 10.
Test method: Continue with the previous test. Under low temperature conditions, adjust the voltage regulator to 250V, switch it on and off three times, with an interval of no less than 8 seconds each time (the interval of 8 seconds is to wait for the capacitors in the lamp to be fully discharged to reduce mutual interference). During this process, the lamp should not be damaged, otherwise it will be considered unqualified.
E: Vibration test.
Main test equipment: 1 vibration test bench
Test quantity: 10 packages.
Test method: Package the test sample, put it on the vibration test bench, adjust the test frequency to 0.5-5 Hz, the cycle is 1 minute, the amplitude is 1.5 cm, test in the three directions of up and down, left and right, and front and back for 30 minutes respectively, and then take out the sample for testing. There should be no damage, otherwise it will be considered unqualified.
F: Life test.
Main test equipment: power supply
Main test items: normal working life
test quantity: 10.
Test method 1: Connect the lamp to the rated voltage of 220V, let it work normally, record the start time of work, and when each lamp is damaged, record the end time. When all lamps are damaged, calculate the average working time of the lamps, which is the life of the product.
Test method 2: According to the actual lamp products, adopt the method of accelerated life aging (such as high temperature, high pressure and frequent switching, etc.), and manufacture special aging equipment according to the actual situation.
G: Aging test.
Before the new product is put into production, it must pass the stages of small batch trial production and medium batch trial production in quantity. Through these tests, non-design problems such as raw materials and process problems can be found. The following is the specific test method.
Main test equipment: aging table, voltage regulator, voltmeter.
Main test items: raw materials for batch product production.
Test quantity: 500 for small test and 2000 for medium test.
Test method: First, adjust the voltage to 250V, turn off the power, then install the product on the aging table, turn it on and off three times, each time with an interval of more than 8 seconds, then turn off the power, then adjust the voltage to 170V, turn it on and off to observe, and finally adjust the voltage to 250V, after aging for 2 hours, turn it on and off three times with an interval of 8 seconds each time, and the aging is over. If any problems are found during the above test process, they are all unqualified products and need to be repaired.