2 results about "Diamond color" patented technology

The automatic diamond color grader can carry out color grading on diamonds on a continuous line, and manual color evaluation is not needed. And a sample diamond is conveyed by the input conveying belt and is placed on the mounting seat on the rotating plate by the mechanical arm. Nm mounting seats are arranged on the rotating plate, and Nr colorimetric stones with known color grades and Ns sample diamonds are mounted on the mounting seats. The camera shoots pictures of all diamonds on the rotating plate, then the stepping motor rotates the rotating plate by 360 / Nm degrees, and another picture is shot. The operation is repeated for Nm times, so that the sample diamond and all the colorimetric stones are respectively imaged at all Nm possible rotating positions. Averaging the pixels of all positions of each diamond to obtain x and y average values of each diamond; and the color grade of the sample diamond is the closest colorimetric stone with light x and y average values.

The application provides a quantum current sensor and a current measurement method, which comprise a diamond NV sensing chip, a magnetic concentrating ring, a laser source, a photoelectric conversion module, a microwave modulation and demodulation module and a magnetic flux regulation module; the magnetic concentrating ring is provided with an opening for sensing the magnetic flux of a measured wire; the diamond NV sensing chip is used for detecting the magnetic flux at the opening; the laser source is used for generating a laser signal of a preset wavelength and outputting the laser signal to the diamond NV sensing chip; the photoelectric conversion module receives a reflected fluorescent signal, converts the fluorescent signal into an electric signal and transmits the electric signal to the microwave modulation and demodulation module to finally obtain a demodulation voltage; and the magnetic flux regulation module obtains a reverse magnetic flux loaded to the magnetic flux detection module based on the demodulation voltage, so as to maintain the magnetic flux at the opening. The application provides the reverse magnetic flux, so that the magnetic field sensed at the NV color center is always in a small range, the problem that the diamond NV color center is difficult to detect under a large current magnetic field is avoided, and the dynamic range of the diamond NV color center for measuring the current is effectively widened.