Experience in wiring harness design and assembly for special equipment

Practice has proved that it takes at least one day or even more time for a medium-sized photoelectric equipment to test its system cabling by conventional means (multimeter and buzzer combined with insulation tester), and it can complete the test task in a few seconds by using the wiring harness design test system. It can be imagined that the intervention of automatic wiring harness testing system is a revolutionary breakthrough to the system cabling detection technology.
Due to the different chemical structure of polymer materials, the ability of radiation polymerization is very different, some mainly degradation, some mainly crosslinking. Even the cross-linked polymer is accompanied by the break of the main chain, so the irradiation time and dose must be strictly controlled to achieve the best crosslinking degree. For the crosslinked polymer, the crosslinking degree increases with the increase of irradiation time and dose.
The system consists of three parts: space part a satellite constellation, ground control part a ground monitoring system and user equipment part a signal receiver. With the development of modern science and technology, global positioning system (GPS) is a multi-functional system of high precision, all-weather and global radio navigation, positioning and timing. It uses a steady stream of positioning signals that are more than 20,000 kilometers above the Earth. Any receiver on the Earth, as long as it receives more than four satellite signals, after calculation, you can get the receiver's position (longitude, latitude, altitude) time and motion state information. The system has the characteristics of high precision, all-weather, high efficiency, multi-function, simple operation and wide application.
The determination of branch assembly sequence of wiring harness design is based on the analysis of branch attributes of wiring harness and its influence on system performance. The assembly principle of wiring harness in engineering is generally the trunk before the branch, and the wiring harness branch with special requirements should be adjusted appropriately according to the needs. According to the assembly principle of trunk first and branch second, the wiring harness branches are automatically sorted layer by layer, and then the process designer adjusts the assembly sequence of wiring harness branches with special requirements according to experience and professional knowledge, so as to obtain the optimal wiring harness branch assembly sequence.
The chromium plated steel strip and tinned steel strip immersed in hydrochloric acid for 20 days, the results of chromium plated steel strip only edge corrosion, and tinned steel strip corrosion serious, the film completely off, the chromium plated steel strip and tinned steel strip immersed in 75 degrees for 7 days, the results of chromium plated steel strip no change, that is, there are very good compatibility, and tinned steel strip polymer film there are many small bubbles, And the longer the soaking time, the more bubbles, that is to say, under this condition, the compatibility of tinned steel strip and bundle paste is poor.
The integrated wiring of equipment system is one of the key points of electronic assembly. In addition to the wiring technology of wiring harness design, the reliability of electrical node connection in the system, such as connecting resistance and insulation strength between nodes, is the top priority of this work.