Simulated automotive wiring harness design structured docking

Traditional manual testing is the main test method, and it has long occupied the field of testing. Faced with the rapid development of aviation industry, the industrialization process is accelerating, and traditional manual testing has not adapted to the large-scale testing needs in development and production and has restricted the overall improvement of the testing technology level. Analysis of the process and technical level of manual testing can clearly understand its limitations. Control test. In the test, it is necessary to check the wiring diagram and line number of the drawing, which is easy to cause missed measurement and misdetection. The test is not comprehensive. On-resistance cannot be detected, components connected to the network, poor contact, unreliable contacts, and inductive effects cannot be detected. Insulation withstands voltage test. The limitation of the output voltage of the megohmmeter cannot meet the insulation resistance test of different automotive wiring harness designs. The technical conditions and accuracy of the detection are limited. The withstand voltage tester is a single loop output, and it is impossible to resist any two points. Pressure test, the test state cannot fully detect the withstand voltage characteristics.

The system software is the basis of the test program design, providing test status display, test parameter setting, and connector library establishment; the test program is built on the connected network of the tested chassis, and the running system software collects the connection relationship of the tested chassis and automatically generates Corresponding connection network. The adapter is the input and output of the harness tester test signal and the interface of the tested chassis. It is the key to the test application. The adapter must be designed to meet the identification of the harness tester. The testable slot of the tested chassis is testable and assignable. Consider scalability and usability. The adapter's adaptation technology determines the correct application of the harness tester and directly determines the uniqueness, accuracy, testability, and maintainability of the connection established between the harness tester and the chassis under test.

As a general-purpose real-time operating system, it is designed for the convenience of designers to design efficient and reliable applications. In addition to providing the task management interface, it also provides semaphores, mailboxes, queues and event flags to achieve tasks. Inter-synchronization and communication.

According to experience, for the object with simple dynamic characteristics of monotonous dynamic characteristics, for the more complex process, the dynamic object control time domain with oscillation generally reflects the importance of the output value of the controlled variable at different times. Generally corresponding. For the time lag or the reverse part, the corresponding value takes other cases, and its value is taken. The internationally advanced automotive wiring harness design test plus quality control system has an impedance test function, but its price is relatively expensive, and many small wire harness manufacturers cannot purchase such test equipment.

The virtual instrument designed must have the function of data acquisition. The project uses a computer with a parallel port and a serial port to obtain test data, which is called a pump-based system. The system includes a PC sensor, signal conditioning device, device signal processing, and driver software. It is required that its dynamic performance meets the requirements of the frequency range of road simulation conditions, and it has good frequency response characteristics. It can also design the vehicle wiring harness of the vehicle to be mounted on the load platform connected to the excitation table for reliability. test. Conduct wireless communication, including voice communication, sending and receiving short messages, and wireless Internet access. The system uses the main function of using it to complete short messages.

Therefore, in order to realize the corresponding relationship, the product structure information and the handle of the corresponding graphic are simultaneously stored in the database, and the two are associated by the graphics handle, and the corresponding product information is modified when the graphic is operated, and vice versa, when the product information is modified. The graphics are modified together.