CN-121995134-A - Accelerated life assessment method of vehicle-mounted optical connector

CN121995134ACN 121995134 ACN121995134 ACN 121995134ACN-121995134-A

Abstract

The invention discloses an accelerated life assessment method of a vehicle-mounted optical connector, which belongs to the technical field of vehicle-mounted connectors and comprises the following steps of determining a limit temperature range which can be born by materials of the vehicle-mounted optical connector and a limit use temperature range which can normally work, constructing a temperature accelerated aging assessment model and a vibration accelerated aging assessment model of the vehicle-mounted optical connector, and obtaining an accelerated experiment condition of the vehicle-mounted optical connector. The accelerated life assessment method can achieve accelerated assessment of the cycle life of the vehicle-mounted optical connector, shortens the time for testing the cycle life of the vehicle-mounted optical connector while guaranteeing the accuracy of the cycle life assessment of the vehicle-mounted optical connector, provides conditions for cycle life judgment of different shaping stages of the vehicle-mounted optical connector and quick spot check after the vehicle-mounted optical connector is measured, provides support for application of the vehicle-mounted optical connector, promotes application of the vehicle-mounted optical connector in a vehicle-mounted environment, and has excellent application prospects.

Inventors

TAN SHUHUA
XIONG ZHUANG
WANG TIEJUN
XU JIN
DUAN JIANBIN

Assignees

长飞光纤光缆股份有限公司

Dates

Publication Date: 20260508
Application Date: 20251230

Claims (10)

1. An accelerated lifetime assessment method for a vehicle-mounted optical connector is characterized by comprising the following steps: (1) Determining a limit temperature range which can be born by the vehicle-mounted optical connector material; (2) Determining a limit use temperature range in which the vehicle-mounted optical connector can work normally; (3) Constructing a temperature accelerated aging evaluation model of the vehicle-mounted optical connector, and representing the temperature accelerated aging evaluation model as follows: (equation 1) (Equation 2) (Equation 3) (Equation 4) In the formula, The number of cycles before failure; Plastic strain for each cycle; the number of times of circulation before the product fails under normal working conditions; The cycle times before the product faults under the accelerated aging cycle are used; Is the difference between the highest temperature and the lowest temperature in the accelerated aging cycle; the average temperature difference of temperature circulation in one day working time under normal working conditions; Is an acceleration rate constant that does not vary with temperature; life expectancy in equivalent acceleration experiments; the service life of the product under normal working conditions is prolonged; is a constant; (4) The vibration accelerated aging evaluation model of the vehicle-mounted optical connector is constructed and characterized as follows: (equation 5) In the formula, The root mean square value of the vibration acceleration under the actual service working condition; the root mean square value of the vibration acceleration under the equivalent acceleration experimental condition; acceleration power spectral density under actual service vibration working conditions; acceleration power spectral density corresponding to equivalent acceleration vibration experiments; is fatigue index; (5) Determining acceleration experiment conditions of the vehicle-mounted optical connector, wherein the acceleration experiment conditions at least comprise a temperature circulation range of the optical connector during sample experiment The limit temperature holding time, the temperature change rate and the vibration acceleration root mean square value Theoretical number of cycles of acceleration experiment ; (6) And carrying out accelerated life assessment on the vehicle-mounted optical connector to be tested according to the accelerated experimental conditions.
2. The accelerated lifetime assessment method of an in-vehicle optical connector according to claim 1, wherein in the step (2), the determination process of the limit use temperature range in which the optical connector can normally operate is as follows: (2.1) connecting the vehicle-mounted optical connector sample into a test light path; (2.2) placing the onboard optical connector sample at the highest temperature that the material can withstand And minimum temperature Reaching heat balance and keeping for a certain time; (2.3) monitoring the transmission performance of the optical connector at the two temperatures, if the optical performance of the optical connector at a certain limit temperature does not meet the requirement, adjusting the working temperature of the optical connector to a certain value in the interval And testing the transmission performance of the product again on the basis until the highest temperature at which the optical connector can work normally is finally obtained And minimum temperature 。
3. The accelerated lifetime assessment method of an in-vehicle optical connector according to claim 2, wherein the temperature is adjusted Is 5 ℃, 10 ℃, 15 ℃ or 20 ℃; And/or At a regulated temperature In the subsequent sample testing process, another optical connector sample which does not participate in the experiment is replaced to participate in the subsequent experiment.
4. The accelerated lifetime assessment method of an in-vehicle optical connector according to any one of claims 1 to 3, wherein in step (3), an acceleration rate constant is used The acquisition process of (a) is as follows: (3.1) selecting a plurality of vehicle-mounted optical connector standard samples, and respectively assembling the vehicle-mounted optical connector standard samples into an experimental wire harness for standby; (3.2) setting a system permission threshold value when the standard sample fails to be judged; (3.3) setting a temperature cycle range of the Standard sample Wherein the temperature cycle range Including a plurality of different temperature cycling ranges; (3.4) carrying out experiments on the standard samples under each temperature cycle condition, and testing the life cycle of each standard sample; (3.5) combining (equation 4), calculating parameters under acceleration experiments And (3) with Fitting to obtain parameters And (3) with Linear relation graph between the two to finally obtain constant Is a value of (2).
5. The accelerated lifetime assessment method of an in-vehicle optical connector of claim 4, wherein in process (3.3), the temperature cycle range Comprising 、、 , wherein, The temperature range is the limit temperature range in which the product can be normally used; Is the selected temperature difference.
6. The accelerated life assessment method of an in-vehicle optical connector according to claim 5, wherein in the step (4), the root mean square value of the vibration acceleration under the equivalent acceleration condition The acquisition process of (a) is as follows: (4.1) setting equivalent acceleration experiment temperature conditions Based on the determination of the constant C, the acceleration factor is obtained by combining (formula 2) And (3) with The correspondence between them; (4.2) combining (equation 5), calculating the equivalent acceleration experiment temperature condition Root mean square value of vibration acceleration ; (4.3) Determining the root mean square value of the measured vibration acceleration Whether the experimental requirements are met or not, if not, changing And repeating the processes (4.1) - (4.3).
7. The accelerated lifetime assessment method of an in-vehicle optical connector according to claim 6, wherein when the vibration condition is determined in the step (5), according to the procedures (4.1) to (4.2), the temperature cycle range is changed To determine the vibration conditions corresponding to different temperature circulation ranges to obtain vibration conditions and temperature circulation ranges A correspondence table between them.
8. The accelerated lifetime assessment method of an on-vehicle optical connector according to any one of claims 1 to 3 and 5 to 7, wherein the accelerated lifetime assessment test is performed on the same type of on-vehicle optical connector based on the determination of the acceleration experimental condition in step (5), and whether the cycle lifetime thereof satisfies the theoretical lifetime is determined based on: under the same equivalent acceleration test condition, whether the test cycle number of the optical connector is higher than the theoretical cycle number Or with the theoretical number of cycles Whether the difference in number of times between is within a set threshold.
9. The accelerated life assessment method of an in-vehicle optical connector according to claim 8, wherein the accelerated life assessment test of the in-vehicle optical connector is performed by the following criteria: in the experiment, the additional attenuation of the in-vehicle optical connector sample was not greater than 0.6dB and no transient break of greater than 1 microsecond occurred, and after the experiment, the additional attenuation of the in-vehicle optical connector sample was not greater than 0.3dB.
10. The accelerated lifetime assessment method of an in-vehicle optical connector according to any one of claims 1 to 3, 5 to 7, 9, further comprising the step of: And selecting a plurality of optical cable samples which are the same as the optical cable connected with the vehicle-mounted optical connector under the accelerated ageing test, protecting the end part of the optical cable, placing the optical cable under the same test condition as the accelerated ageing test, and conducting the optical cable when the accelerated ageing test of the vehicle-mounted optical connector judges that the optical cable fails.

Description

Accelerated life assessment method of vehicle-mounted optical connector Technical Field The invention belongs to the technical field of vehicle-mounted connectors, and particularly relates to an accelerated life assessment method of a vehicle-mounted optical connector. Background In recent years, under the trend of electric and intelligent automobiles, the vehicle-mounted data volume is blown out, and the conventional radio frequency electric connector is increasingly insufficient for practical application. In this case, the rapid development of the vehicle-mounted field is initiated by the optical signal transmission, and various manufacturers of large optical fiber cables and automobile manufacturers are also put into the development of vehicle-mounted optical fiber high-speed communication technology. Although both fiber optic connectors and in-vehicle electrical connectors have been commercially available for many years, the environment of application and failure mechanisms are quite different. The application of the optical fiber connector in the vehicle-mounted environment becomes a new subject of attention of researchers, and how to evaluate the service life and the reliability of the optical fiber connector in the vehicle-mounted environment has great significance for the application of the optical fiber connector in the vehicle-mounted environment. However, the service life evaluation of the vehicle-mounted connector is mainly focused on the vehicle-mounted electric connector, and the vehicle-mounted optical connector is used as an emerging product in the vehicle-mounted field, and a certain blank exists in the service life evaluation method, so that the application of the vehicle-mounted optical connector is restricted to a certain extent. Disclosure of Invention Aiming at one or more of the defects or improvement demands of the prior art, the invention provides an accelerated life assessment method of a vehicle-mounted optical connector, which can achieve accelerated life assessment of the vehicle-mounted optical connector under the conditions of temperature acceleration and vibration acceleration, greatly shorten the life assessment time of the vehicle-mounted optical connector and improve the life assessment efficiency of the vehicle-mounted optical connector. In order to achieve the above object, the present invention provides an accelerated lifetime assessment method for a vehicle-mounted optical connector, comprising the steps of: (1) Determining a limit temperature range which can be born by the vehicle-mounted optical connector material; (2) Determining a limit use temperature range in which the vehicle-mounted optical connector can work normally; (3) Constructing a temperature accelerated aging evaluation model of the vehicle-mounted optical connector, and representing the temperature accelerated aging evaluation model as follows: (equation 1) (Equation 2) (Equation 3) (Equation 4) In the formula,The number of cycles before failure; Plastic strain for each cycle; the number of times of circulation before the product fails under normal working conditions; The cycle times before the product faults under the accelerated aging cycle are used; Is the difference between the highest temperature and the lowest temperature in the accelerated aging cycle; the average temperature difference of temperature circulation in one day working time under normal working conditions; Is an acceleration rate constant that does not vary with temperature; life expectancy in equivalent acceleration experiments; the service life of the product under normal working conditions is prolonged; is a constant; (4) The vibration accelerated aging evaluation model of the vehicle-mounted optical connector is constructed and characterized as follows: (equation 5) In the formula,The root mean square value of the vibration acceleration under the actual service working condition; the root mean square value of the vibration acceleration under the equivalent acceleration experimental condition; acceleration power spectral density under actual service vibration working conditions; acceleration power spectral density corresponding to equivalent acceleration vibration experiments; is fatigue index; (5) Determining acceleration experiment conditions of the vehicle-mounted optical connector, wherein the acceleration experiment conditions at least comprise a temperature circulation range of the optical connector during sample experiment The limit temperature holding time, the temperature change rate and the vibration acceleration root mean square valueTheoretical number of cycles of acceleration experiment; (6) And carrying out accelerated life assessment on the vehicle-mounted optical connector to be tested according to the accelerated experimental conditions. As a further improvement of the present invention, in the step (2), the determination process of the limit use temperature range in which the optical connector can nor