3results about How to "Fast sampling speed" patented technology

This invention provides a broadband atomic terahertz detection method and apparatus, relating to the field of terahertz detection and imaging technology. The method includes: generating a time-coded sequence using an arbitrary waveform generator; controlling a microwave switch to perform orthogonal coding modulation on a terahertz field to generate a terahertz differential signal carrying coded information; applying the terahertz differential signal to Rydberg atoms in an atomic gas cell to convert terahertz information into changes in the transmitted light intensity of the probe light, and converting the optical signal into an electrical signal; synchronously demodulating and acquiring the electrical signal to generate a measurement vector; and reconstructing the original terahertz time-domain waveform from the measurement vector using a compressed sensing reconstruction algorithm. This invention, by combining superheterodyne detection and time-domain computational imaging algorithms, overcomes the physical limitations of the bandwidth of atomic detectors, achieving rapid and high-resolution detection of broadband terahertz signals while maintaining their high sensitivity advantages.

The utility model relates to the field of polypropylene particle production, especially a kind of sampling and material taking device for polypropylene particle production, including the blanking tube, storage frame, shield cover, feed pipe and blanking port etc., storage frame is located in the right side of blanking tube, blanking tube lower part is connected with shield cover, shield cover is rotatably connected with feed pipe, storage frame left part upper side is connected with blanking port, feed pipe is rotatably connected with blanking port.The utility model passes through polypropylene particle and flows into blanking tube and is discharged, simultaneously through feed pipe rotation opening, part polypropylene particle will drop into feed pipe, and polypropylene particle is conveyed by screw conveying leaf rotation, from blanking port sliding out and falling into sampling cylinder and sampling, by rotating plate rotation switching sampling cylinder sampling, to be able to automatically sample polypropylene particle when production simultaneously realizes continuous sampling, it is easy to operate, reduces manual intervention, ensures production quality, improves sampling and production efficiency.

This utility model discloses a sampling device for detecting particulate matter in exhaust gas, including a mounting shell, an exhaust fan, a sampling tube, and a push-pull component. A rotating seat is rotatably mounted inside the mounting shell, and multiple placement slots are provided on the rotating seat. An installation slot is provided on one side of the mounting shell, and a connecting pipe is installed inside the installation slot. A connecting assembly is provided on one side of the sampling tube. The connecting assembly includes a second connecting port. A hexagonal tube is provided on one side inside the sampling tube, and a spring is provided on the outside of the hexagonal tube. A hexagonal rod is slidably mounted inside the hexagonal tube, and a baffle is provided on the spring. This utility model allows air to be drawn into the sampling tube by the exhaust fan. After sampling, the air is extracted. The spring pushes the baffle, causing the second sealing ring to adhere to the inside of the second connecting port. Therefore, by continuously rotating the rotating seat and pushing and pulling the push-pull component, air can be delivered to multiple sampling tubes, thereby completing the sampling process and effectively accelerating the sampling speed.