Abstract:

To address the shortcomings of poor accuracy, low efficiency, time-consuming and labor-intensive testing, as well as damage to the contact spring of the 1/2 crystal cover sealed relay contact spring system when using traditional manual methods for contact parameter testing, a contact parameter automatic testing system is designed and implemented using a certain type of 1/2 crystal cover sealed relay contact spring system as the testing object. The system uses machine vision detection technology to automatically test the contact gap, and uses an electric sliding table combined with a acrylic meter to automatically test the initial pressure of the contact. The automatic testing is conducted on the contact spring samples of the same type of relay. The experimental results show that the testing accuracy of the system's contact gap is higher than 1 μm, and the test accuracy of the contact initial pressure is 1 mN, which can ensure the consistency of contact parameters during relay assembly.

Key words: relay, contact gap, contact pressure, automatic testing system, machine vision