An environmental stress screening test method and device

Abstract

The invention discloses an environmental stress screening test method and device, and aims at improving timeliness and effectiveness of environmental stress screening test. The method comprises that temperature stresses are applied according to a preset cycle index, and each time the temperature stress is applied, a first heating operation, a first high temperature maintaining operation, a second high temperature maintaining operation, a cooling operation, a first low temperature maintaining operation, a second low temperature maintaining operation and a second heating operation are executed successively; when the temperature stress is applied for the first time, a vibration stress is applied while the second high temperature maintaining operation and the second low temperature maintaining operation are executed; and each time the temperature stress is applied, an electric stress is applied. Thus, the environmental stress screening test can be completed in one test with once establishment of a test environment, three types of stresses are applied at the same time, defects in an integrated stress state can be screened, and the test timeliness and effectiveness are improved.

Description

technical field [0001] The invention relates to the communication field, in particular to an environmental stress screening test method and device. Background technique [0002] At present, the whole machine test process of communication base station products includes a series of links such as the whole machine function test, the whole machine environment test and the whole machine reliability test, among which the environmental stress screening test in the whole machine reliability test is inseparable from the links before and after If the screening conditions are not appropriate, the products after screening cannot reach the stage of basically constant failure rate. Therefore, the test quality of this link will directly affect the execution effect of the subsequent links, and ultimately affect the operation of the product in the field. [0003] In the prior art, for the environmental stress screening test of communication base station products, the commonly used method is ...

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Problems solved by technology

[0019] (1) The test time is long and the operation is complicated: during the test, the tested product is transported from the shaking table and the incubator several times during the whole test process, and multiple test environment construction and environmental calibration are required. Not only the environmental consistency and equipment status are difficult Guarantee, and the progress of the test is also seriously affected;

[0020] (2) The degree of screening is low. Since the combined stress, temperature stress and vibration stress are applied sequentially, various stresses can only stimulate product defects under the action of single stress, and some product defects that will be precipitated under the comprehensive stress state are difficult to produce. Find;

[0021] (3) The type of stress is missing. For base station products working in the field, they often work in a working environment with unstable mains power. However, in the environmental stress screening test of the prior art, the instability of the power supply voltage causes the working state of the base station products. Anomalies cannot be detected;

[0022] (4) The test parameters are inaccurate. For different tested products, the test parameters should also be determined according to the specific equipment design capabilities and usage conditions;

[0023] (5) There are relatively many test equipment, and it is necessary to have a thermostat and a vibration table to complete the test, which is a huge investment for the manufacturer

[0024] Based on the above analysis, the existing environmental stress screening test methods have defects such as long test time and low validity of test results.

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