Environmental stress screening test
Reliability development test
Reliability growth test
Reliability qualification test
Reliability acceptance test
Life test
Reliability Test Methods Evaluate The Reliability Of Products Reaching Predetermined Indicators
Conduct Types of ORT Reliability Testing Of Finalized Products Or Acceptance
In Order To Improve ORT Reliability, ORT Testing Formulate And Improve Reliability ORT Test Plans
Divided by environmental conditions, method of reliability test can be divided into simulation test and field test under various stress conditions.
Divided by test items, method of ort ongoing reliability test is divided into environmental reliability test services, reliability and life testing, accelerated test and various special tests.
According to the ort test plan purpose, ort testing can be divided into screening test, identification test and acceptance test.
According to the nature of the reliability test design, ort testing can be divided into two categories: destructive test and non-destructive test. For third party ort testing in more kinds.
Climate environment temperature and humidity: high temperature storage test and low temperature storage test, constant humidity and damp heat steady state test, alternating humidity and heat, high temperature high humidity test, rapid temperature change, cold and heat shock, low air pressure (high simulation) and carbon arc testing.
Mechanical environment-random vibration test, sinusoidal vibration test, resonance search and dwell, sine + random vibration test, random + random vibration test, shock and vibration testing, collision test, steady state acceleration test, drop test and crash test service.
Comprehensive environment-temperature + humidity + vibration, temperature + humidity + shock, temperature + humidity + collision, HALT/HASS/HASA, temperature + humidity + stacking, high pressure cooking.
Biological and chemically active substance environment: salt spray test, mold test, gas corrosion test, chemical resistance, artificial sweat test.
Protection level: IP protection (waterproof, dustproof), IK protection (protection against external mechanical collisions).
Physical properties: chemical resistance, adhesion strength test/abrasion resistance test/scratch abrasion value test, material hardness test, tensile testing of materials/compressive/yield strength, test bending/swing, insertion/torque test, flame retardant test, falling ball impact test/pendulum impact test/impact hammer Impact test, color fastness test/colour difference test, melt index test/melting point test, roll barrel drop/directional drop/slight drop, the button test, reflectivity test/transmittance test/absorption test rate.
Electrical properties: insulation and resistance test/battery voltage drop test, contact resistance test, ground resistance/earth resistivity measurement, temperature rise test, dielectric strength test, ESD test/electrostatic discharge test, iv curve test, noise/sound audio quality test, resistance test/capacitance test/inductance test, instantaneous interruption, electrical fast transient test/EFT test, charge discharge test.
1. Reliability service capability: reliability enhancement test, MTBF reliability appraisal and acceptance test, accelerated life test, Environmental stress screening test. 2. Technical service capabilities: tooling and fixture design and production, non-standard test method development, test plan development, and design.
Large/heavy test capability
1. 5 ton large displacement vibration table.
2. 18 ton vibration table.
3. 18 cubic temperature and humidity test chamber.
4. 18 cubic alternating salt spray test chamber.
5. 18 cubic dustproof test chamber.
ORT ongoing reliability testing services refer to testing and verifying the reliability of products. The research finds out the weak points of the product with limited samples, time, and usage costs.
ORT environmental reliability test services are the general term for various tests conducted to understand, evaluate, analyze and improve the reliability of products. ORT ongoing reliability testing is an effective method to eliminate early product defects, increase or test product reliability levels, test product reliability indicators, and evaluate product life indicators by imposing typical environmental stresses and working loads. According to the needs to be achieved, different types of ORT ongoing reliability testing can be carried out during the design, development, production and use stages of the product.
Environmental stress screening test
Reliability development test
Reliability growth test
Reliability qualification test
Reliability acceptance test
Life test
Time censoring test
Sequential test
Reliability growth test
Highly accelerated test (HALT)
Essentially, DfR is a process that ensures a product, or system, performs a specified function within a given environment over the expected lifetime.
DfR often occurs at the design stage — before physical prototyping — and is often part of an overall design for excellence (DfX) strategy. But, as you’ll soon find out about reliability test design, the use of DfR can, and should, be expanded.
Mechanical environment: improve the strength of the product structure, select higher standard devices, or protect the device structure through external means.
Electrical stress: reduce the electronic stress of its own equipment and reduce the external interference electronic stress
1. Identify and improve life bottlenecks
2. Improve stress standards
3. Improve the use environment
4. Effective isolation: electrical isolation, functional isolation, spacing isolation or shielding.
5. Reduce the effect of failure
6. Appropriate over-design of passive devices
7. Design a replaceable protection module
Reliability testing is the activity performed to evaluate the functional reliability of a product over a specified lifetime in all environments of intended use, transportation, or storage. ORT reliability testing is to expose the product to natural or artificial environmental conditions to undergo its action to evaluate the performance of the product under the environmental conditions of actual use, transportation and storage, and to analyze and study the degree of influence of environmental factors and its mechanism of action. Environmental reliability test services include different types of reliability testing: aging test, temperature and humidity test, gas corrosion test, mechanical vibration test, mechanical shock test, crash test and transit drop test, dustproof and waterproof test, packaging pressure test, such as high pressure test and many other environmental reliability tests.
Select reliable and appropriate components
Select reliable and stable circuit in the reliability test design
Carry out a lot of ORT test and verification in the design, and provide the design limit of the product.
Do a good job in DFMEA, and make design prevention for the possible failure.
Design the process (TS16949) and DOE
Product design fully considers manufacturability and maintainability
Modular or tolerance design
An effective reliability test should be able to effectively find problems in the product structure and function during the ORT testing, and improve the product through the problems found in the test. The product can be routinely tested according to the relevant product test standards. If it passes, it means that the ORT test plan is valid and the product meets the standard requirements, otherwise it is invalid.
ORT reliability testing refers to the ability to complete the specified function in the specified time and under specified conditions. Mainly have the following 3 aspects
(1) Find various defects in the product design, components, parts, raw materials and craftsmanship.
(2) Confirm whether it meets the reliability quantitative requirements or evaluate the reliability level of the product.
(3) Environmental reliability test services obtain various other useful information.
The measurement indicators of product reliability ORT testing include reliability, failure degree, failure probability density, failure rate, average life and reliable life, and average trouble-free working time.
