An Accelerated Experiment Method for Connectors Based on Multiple Environmental Stresses

Abstract

The present invention discloses a connector acceleration experiment method based on multiple environmental stresses. The present invention includes: classifying the particle stress levels, screening from aspects such as the type of particles, particle size, and particle mass, and selecting appropriate particle stress conditions for acceleration tests; dissolving high-precision salt in pure water to prepare an appropriate concentration of NaCl solution. Place the NaCl solution, silicon dioxide particles, and connector plugs in the corresponding positions, conduct acceleration tests and collect data. The connector acceleration experiment method with multiple environmental stresses proposed by the present invention can be applied to experiments with salt spray and dust as acceleration stresses, so as to predict the life of the connector.

Description

Technical Field

[0001] The present invention designs an accelerated test method, which can simulate the environmental stress effects of dust and salt spray, and belongs to the technical field of communication system reliability. Background Art

[0002] China is a country with a relatively wide distribution of deserts and desertified lands in the world, and the area of desertified land is 1.76 million square kilometers. According to the provisions of the Law of the Sea of the World, the marine territory area owned by China is 2.997 million square kilometers. Working in desert, gobi, and marine environments for a long time has become the norm for equipment components. When electronic products work in marine or desert environments, they are mostly exposed to the atmospheric environment and are affected by environmental stresses such as dust, salt spray, and high temperature. Environmental stresses can cause the interconnect areas of circuits to degrade or even fail, leading to system failures and seriously threatening the signal integrity and reliability of equipment.

[0003] As a special basic component, electrical connectors are widely used in industries such as aviation, aerospace, electronics, and communication. The number of various aviation electrical connectors on an aircraft is huge, and their role and status are very important. It is required that they must work reliably under various harsh environmental conditions. If a failure occurs, it will cause the entire associated system to malfunction.

[0004] High reliability and long life have become one of the important development goals of connection devices working in this environment. However, there is a contradiction between the short cycle, low cost of the overall system test and high reliability and long life. Therefore, as a method for measuring the reliability and life of devices, rapid, accurate, and controllable accelerated test technology has always been pursued by people. From an experimental perspective, accelerated test technology has become an inevitable requirement for ensuring the high reliability and long life of equipment under time and cost constraints. In addition, among these equipment components, each component is connected through different connectors. Therefore, studying the accelerated test of connectors is of great significance for improving the reliability of the entire equipment.

[0005] In summary, designing an accelerated test and simulating a multi-mode stress accelerated experimental platform for dust and salt spray environments in the atmosphere, and studying the degradation process of connectors in salt spray and dust environments can meet the requirements of China's national defense and other departments for high product reliability. Summary of the Invention

[0006] In view of the above technical problems, the present invention provides two environmental stress accelerated experimental methods, which are overall simple and easy to operate and are applicable to the design of accelerated tests:

[0007] (1) Particle Selection

[0008] Select silicon dioxide particles with a particle radius of 1 μm, and weigh a certain mass of the particles using an electronic scale.

[0009] (2) Preparation of salt solution

[0010] Prepare a NaCl solution with a corresponding concentration by using a certain volume of pure water and a certain mass of salt (accuracy > 97%).

[0011] (3) Conduct an accelerated test and collect data:

[0012] Conduct an accelerated test on the connector. Take out the connector from the experimental device at regular intervals, measure the contact resistance value of the connector by the four-point method, and record it. The designed experimental device is as Figure 3 shown.

[0013] The dust and salt spray accelerated test method proposed by the present invention has the following main advantages: The designed accelerated test device is convenient to operate and simple to implement. It can simultaneously simulate the accelerated experimental environments of dust and salt spray stresses and is applicable to the acceleration in terms of relevant environmental stresses. Brief description of the drawings

[0014] Figure 1 is the flow chart of the accelerated experiment design of the present invention

[0015] Figure 2 is the schematic structural diagram of the accelerated test system of the present invention

[0016] Figure 3 is the drawing of the accelerated experimental device of the present invention Detailed implementation manners

[0017] The present invention will be elaborated in detail below through the drawings and implementation steps.

[0018] This embodiment combines Figure 1 ——3 to illustrate the specific process of the method of the present invention, and the method includes:

[0019] Steps 101, 103 - 105: Particle selection:

[0020] Select silicon dioxide particles with a particle size of 1um, and weigh a certain mass of the particles using an electronic scale.

[0021] Steps 102, 106 - 108: Preparation of salt solution: Prepare a NaCl solution with a relative concentration by using a certain volume of pure water and a certain mass of salt (accuracy > 97%).

[0022] Steps 109 - 111: Placement of the connector;

[0023] According to the experimental requirements, place the connector stably at positions 1 - 6 or positions 1' - 4'. Note that during the placement process, one end of the connector is closed.

[0024] Steps 112 - 115: Conduct an accelerated test and collect data:

[0025] Conduct an accelerated test on the connector. Take the connector out of the experimental device at regular intervals, measure the contact resistance value of the connector using the four - point method, and record it. The designed experimental device is as Figure 2 , Figure 3 shown.

[0026] Steps 201 - 206: Specific process of the accelerated test

[0027] (1) Before the experiment starts, first weigh a certain mass of silica particles with a mass of A (mg) using an electronic balance, and measure the length, width, and height of the experimental device to calculate the gas volume as V1 (cm 3 ), then the mass index of the particles can be obtained as A / V1 (mg / cm 3 ), and record it. Put the weighed particles into the experimental module 204, and place the connected sample in the designated position (positions 1 - 6) of the experimental device (such as Figure 3 ). Start the blower module 202 through the controller module 201 and start the experiment. At regular intervals of time T = [t1, t2, t3, t4, t5, t6, t7, t8, t9, t 10 , use the contact resistance measurement module 205 to measure the contact resistance value of the connector, so as to draw a degradation curve of the contact resistance changing with time.

[0028] In Figure 3 's dust - accelerated experimental device, the overall appearance is a cuboid, but its ABCDEF surface is not sealed. During the experiment, a transparent acrylic plate cover needs to be placed on the top of the box to facilitate observing the movement of silica particles during the experiment. Place a blower on the A'B'E'F' surface of the device to provide the wind speed during the experiment; place a certain mass of silica particles under the blower before the experiment, and they will move randomly under the excitation of the wind speed; place the connector samples to be measured at positions 1 - 6 respectively. After blowing for a period of time, remove the transparent glass plate and use a DM - 100A digital micro - ohm and micro - voltmeter to measure the contact resistance of the connector.

[0029] (2) Before the experiment starts, first weigh a certain mass of salt with a mass of B (mg) (accuracy > 97%) using an electronic balance, and use pure water with a volume of V2 (cm 3 ), then the salt solution concentration can be obtained as approximately B / V2 (mg / cm 3 ), and record it. Put the salt solution into the experimental module 204, and place the connected sample in the experimental device (such as Figure 3) at the specified positions (positions 1'-4'), start the atomization sheet module 203 through the controller module 201, and start the experiment. Every certain time T = [t1, t2, t3, t4, t5, t6, t7, t8, t9, t 10 Use the measurement contact resistance module 205 to measure the contact resistance value of the connector, so as to draw a degradation curve of the contact resistance changing with time.

[0030] In Figure 3 the salt spray acceleration test device, the overall appearance is a cuboid, but its ABCDEF surface is not sealed. During the experiment, a transparent acrylic plate cover is placed on the top of the box to facilitate observing the salt spray situation during the experiment. Place a water tank and atomization devices such as atomization sheets at the bottom of the salt spray device; place the corresponding salt solution at the spray position before the experiment; place the connector samples to be measured at positions 1'-4' respectively. After atomizing for a period of time, remove the transparent glass plate and use a DM-100A digital micro-ohm and micro-volt meter to measure the contact resistance of the connector.

Claims

1. A connector acceleration experiment method based on multiple environmental stresses, characterized in that: Steps 101, 103 - 105: Particle selection: Select silica particles with a size of 1 μm, and weigh a certain mass of the particles using an electronic scale. Steps 102, 106 - 108: Preparation of salt solution: Use a certain volume of pure water and a certain mass of salt with a precision > 97% to prepare an NaCl solution with a relative concentration. Steps 109 - 111: Placement of the connector; According to the experimental requirements, place the connectors stably at positions 1 - 6 and positions 1' - 4' respectively. During the placement process, seal one end of the connector. Steps 112 - 115: Conduct acceleration test and collect data: Conduct an acceleration test on the connector. Take out the connector from the experimental device at regular intervals, measure the contact resistance value of the connector using the four-point method, and record it. Steps 201 - 206: Specific process of the accelerated test. First, weigh a certain mass of Amg of silica particles using an electronic balance, measure the length, width, and height of the experimental device, and calculate the gas volume as V1 cm 3 , then the mass index of the particles is obtained as A / V1 mg / cm 3 , record. Put the weighed particles into the experimental module, and place the connected sample at the designated positions 1 - 6 of the experimental device. Start the blower module through the controller module and start the experiment. Every certain time T = [t1,t2,t3,t4,t5,t6,t7,t8,t9,t10]Measure the contact resistance value of the connector using the measurement contact resistance module, thereby plotting a degradation curve of the contact resistance varying with time. Weigh a certain mass of salt, B mg, using an electronic scale with an accuracy > 97%, and use V2 cm 3 of pure water, then the concentration of the salt solution is approximately B / V2 mg / cm 3 . Record, put the salt solution into the experimental module, and place the connected sample at the designated positions 1'-4' of the experimental device. Start the atomization sheet module through the controller module and begin the experiment. At regular intervals of time T = [t1,t2,t3,t4,t5,t6,t7,t8,t9,t10], measure the contact resistance value of the connector using the measurement contact resistance module, thereby plotting a degradation curve of the contact resistance varying with time, The overall acceleration experimental device is a cuboid with its eight vertices being ACDFA'C'D'F'. Its ACDF surface is not sealed and is divided into a dust acceleration experimental device and a salt spray acceleration experimental device. In the dust acceleration experimental device, its eight vertices are ABEFA'B'E'F'. During the experiment, cover the top of the box with a transparent acrylic plate to facilitate observing the movement of silica particles during the experiment. Place a fan on the A'B'E'F' surface of the device to provide the wind speed during the experiment. Before the experiment, place a certain mass of silica particles under the fan, and they will move randomly under the excitation of the wind speed. Place the connector samples to be measured at positions 1 - 6 in the device respectively. After blowing for a period of time, remove the transparent plate and use a DM - 100A digital micro - ohm and micro - voltmeter to measure the contact resistance of the connector. In the salt spray acceleration experimental device, cover the top of the box with a transparent acrylic plate during the experiment to facilitate observing the salt spray situation during the experiment. Place a water tank and an atomization sheet atomization device on the bottom surface of the salt spray device. Place the corresponding salt solution at the spraying position before the experiment. Place the connector samples to be measured at positions 1' - 4' respectively. After atomizing for a period of time, remove the transparent plate and use a DM - 100A digital micro - ohm and micro - voltmeter to measure the contact resistance of the connector.

Images