48results about How to "Does not affect test accuracy" patented technology

The invention provides a conductive slip ring friction moment precise measurement device, and relates to the field of precise instrument tests. The device includes a bed plate, a vertical plate, a conductive slip ring, a top plate, a slip ring rotor stirring circular ring, a measuring meter, a test disc, a fixed plate and a slip ring rotor end outgoing line, wherein the bed plate is vertically fixed at the bottommost end; the vertical plate is vertically fixed at the top of the bed plate; the top plate is horizontally fixedly mounted at the top of the vertical plate; the conductive slip ring is fixedly mounted on the lower surface of the top plate; the bottom of the conductive slip ring is fixedly equipped with the slip ring rotor stirring circular ring; the slip ring rotor stirring circular ring is fixedly mounted on the upper surface of the test disc; the test disc is fixedly mounted on the upper surface of the fixed plate; the edge of the upper surface of the test disc is fixedly equipped with the measuring meter; and the lower end of the slip ring rotor stirring circular ring is coaxially equipped with the slip ring rotor end outgoing line. The conductive slip ring friction moment precise measurement device realizes accurate measurement of the starting friction moment of a conductive slip ring, repeatedly measures the same conductive slip ring, and has relatively high consistency.

The invention provides a cold storage constant temperature experiment case which comprises an insulation can, a cool storage apparatus and a refrigeration apparatus, wherein the insulation can has a thermostatic chamber, a cool storage chamber and a placing chamber, and an inlet and an air outlet are provided between the thermostatic chamber and the cool storage chamber to enable cold energy circulation between the thermostatic chamber and the cool storage chamber. The cool storage apparatus is disposed in the cool storage chamber, the refrigeration apparatus is disposed in the placing chamber, the refrigeration apparatus connects with the cool storage apparatus, cold energy generated by the refrigeration apparatus is stored by the cool storage apparatus, thus the thermostatic chamber realizes temperature maintenance through the cold energy stored by the cool storage apparatus.

The invention discloses an auxiliary tooling for screening and testing thermistor chips with surface electrodes, which is used for screening and testing the thermistor chips with surface electrodes. The direction is a vertical metal column, and the insulating cover plate is provided with a plurality of cover plate through holes, the cover plate through holes include a first through hole and a second through hole, and a plurality of cover plate through holes correspond to a plurality of metal columns one by one , the insulating cover plate and the common electrode plate are vertically overlapped and connected, and the metal post is placed in the second through hole and is close to the common electrode plate. In the present invention, by adding a metal post and an insulating base for limiting the position of the metal post, the thermistor chip is placed between one end of the metal post and the common electrode plate during testing, and the tip of the test pen touches the metal post without contacting the surface of the resistance chip. It will scratch the surface of the resistance chip, effectively protect the resistance chip, and the resistance chip will not be displaced with the movement of the test pen, and the resistance value test has good repeatability.