3results about How to "Avoid false signals" patented technology

An automatic ultrasonic flaw detection device, belonging to the field of ultrasonic flaw detection technology, aims to solve the problems of misjudging surface interference as internal cracks or inclusions and damage caused by direct contact between the probe and the shaft. The invention includes a frame, a drive component installed inside the frame, a movable plate on the surface of the drive component, a fixed cylinder fixedly installed inside the movable plate, and a fixed column slidably connected inside the fixed cylinder. This invention uses an electromagnetic coil to excite a high-frequency alternating magnetic field, which can penetrate obstacles such as rust protrusions and weld beads on the surface of the shaft, directly generating ultrasonic waves in the metal substrate. This eliminates the need for the ultrasonic probe to contact the shaft. On the one hand, it avoids false signals generated by reflections from obstacles in traditional contact probes, reducing the false judgment rate. On the other hand, it can receive ultrasonic reflected waves through air coupling without the need for a coupling agent, reducing energy loss caused by uneven application of the coupling agent and eliminating interference from surface obstacles.

The application discloses a micro-channel plate detector reading system, and relates to the field of nuclear and particle detection. The detector system comprises a micro-channel plate combination, a resistive layer, a bias voltage electrode layer, a sensing reading layer and multi-channel reading electronics arranged in sequence. The sensing reading layer comprises an insulating layer and a sensing reading electrode layer. The sensing reading electrode layer is arranged in the insulating layer. The resistive layer is a diamond-like carbon film. The application can improve the working life and position resolution of the MCP detector.

The utility model discloses a vertical machining center cylinder protection automatic door device relates to lathe technical field, include: the protection door, the sliding setting in the opening of protection interval, cylinder transmission subassembly, set up in the top of protection door, wherein including three five -way medium -leak solenoid valve and telescopic cylinder, three five -way medium -leak solenoid valve one end is provided with silencer, the other end is connected with telescopic cylinder, and the output of telescopic cylinder is connected with protection door, limit switch subassembly, set up in the top of protection door, wherein including a pair of limit switch and limit block, limit block sets up on protection door, when protection door reaches the door opening position, limit block and a limit switch abut, when protection door reaches the door closing position, limit block and another limit switch abut, control unit, with two component control connection, the device solves cylinder protection automatic door loose and easily damaged, switch door signal acquisition unsafe, inaccuracy and power -off operation maintenance difficult etc.