Exploring how mobile testing is portable and efficient? Tengfang Zhongke TFC
With the development of science and technology, testing technology is also constantly improving, and testing equipment has become complex and sophisticated. In a professional testing laboratory, if you need to complete a complex system test, which may include functional testing, performance testing, environmental testing, compatibility testing, etc., you often need hundreds or even thousands of square test cabinets. Of course, in such a professional testing laboratory, the test data obtained are often very accurate and reliable.
But not all test items, it can bring the tested objects into the laboratory, such as the daily maintenance of large aviation aircraft, bridge safety monitoring, radio monitoring in special places, avionics equipment testing, radar data monitoring and so on.
In these experimental projects, we often need to bring test equipment to our test object/test environment for data collection and data analysis. At this time, large test equipment has been unable to meet the demand, portable test box came into being.
At present, in order to facilitate portable and accommodate as many test items as possible, portable test boxes adopt a combination of PXI/PXIe/PCI/PCIe and other test cards on a portable integrated computer. Under the condition of ensuring a certain duration of life, in order to adapt to different test environments, these portable test boxes have been reinforced to a certain extent, such
1. Adopt soft anti-collision angle to prevent falling and collision damage;
2. The use of aluminum alloy shell, waterproof, resistant to fall and corrosion resistance, but also can do relatively light material;
3. The test card slots are designed in the chassis to prevent the damage of expensive test cards and avoid the influence of environmental factors on the test effect.
At the same time, according to the different testing requirements, these portable test boxes can accommodate 2 to 18 test cards to realize data acquisition of temperature, vibration, pressure, current, etc.; parameter measurement and analysis, transient signal detection, analog and digital signal mediation and video analysis.
However, in a limited space, the more test cards, the more inconvenient it is to operate. Because the test cards are all built-in, each test wiring needs to insert/lock the corresponding wiring harness one by one, which takes a very long time. Moreover, for the test card, multiple plugging and unplugging will damage the contacts of the connector, resulting in error or loss of test data. At this time, you need a connector that can centralize the signal channel and can be switched on and off many times and easily. Handheld connectors came into being.
At present, there are several types of handheld connectors for portable test boxes on the market. They are characterized
1. The width is not more than 5cm, which is very convenient to grasp;
2. Using 180 knob locking mechanism, labor-saving design, even in the case of full PIN, can also be easily inserted and unplugged with one hand;
3. It adopts module design, which can be compatible with common current, optical fiber, radio frequency, high power and other signal types according to different test requirements, and can also be compatible with mixed signals.
4. Guarantee more than 10000 times of plugging and unplugging, which is equivalent to testing once a day, and the joint will not be broken for 25 consecutive years.
The connection scheme shown in the following figure adopts a portable case with 8 test card slots and an F2 series hand-held connector. 160 channels of 10A current signals and 8 channels of 65A power signals are concentrated on this interface. The docking of the test end is completed by knob locking, and the other end of the connector is connected with the measured object in the form of an aviation plug/terminal.
No matter how the test items and methods iterate, in the case of ensuring the accuracy of the test, convenient operation and small size are the future trends of the test equipment, and choosing a reliable connection is also an important aspect of the guarantee test. What do you think?
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