54results about How to "Realize signal acquisition" patented technology

Quantum magneto-optical sensors involve the field of sensors for quantum-level ultra-trace detection of nuclear magnetic resonance and Raman spectroscopy, specifically including the discovery of the electronic energy of specific protons in the detection object under the states of nuclear magnetic magnetization, nuclear magnetic resonance, nuclear magnetic relaxation and nuclear magnetic demagnetization. The difference in distribution probability of Raman scattered light in azimuth and direction caused by the order transition, and finding and adjusting the optimal magneto-optical angle between excitation light and Raman scattered light will obtain higher collection efficiency of Raman scattered light. The characteristic magnetic spectrum and the characteristic spectrum, according to the quantum correlation, can also find out more information from the quantum correlation. Specifically, the main magnetic field generator, the excitation induction coil, the control subsystem, the laser and the Raman probe constitute the quantum magneto-optical sensor. By adjusting the magneto-optical angle in an off-axis or coaxial way, the Raman spectrum collection efficiency can be improved, and at the same time, the correlation between the characteristic magnetic spectrum and the characteristic spectrum in multiple states can be realized, which provides a calculation basis for further analyzing the content of the detected molecules.

The invention discloses a device and method for judging the rotation phase position and the real-time position of an engine crankshaft. The device comprises an engine cylinder head, a camshaft, a housing fixing bolt, a target disc, a target disc fixing bolt, a housing, a photoelectric sensor, a photoelectric sensor fixing bolt, a single chip and a connecting wire. The target disc is provided with an outer edge gap and three concentric gap ring belts. 180 single gaps are uniformly distributed in the outer-circle gap ring belt, 60 double-gaps are uniformly distributed in the middle-circle gap ring belt, and 60 single gaps are uniformly distributed in the inner-circle gap ring belt. A light emitter and a light receiver are respectively arranged on the two sides of each of the concentric gap ring belt and the outer edge gap. According to the change of output signals of the light receiver group, when the target disc rotates along with the camshaft, the directions of clockwise rotation and counterclockwise rotation of an engine are judged and the real-time phase position of the crankshaft is calculated. The device and the method can achieve precise judging to the directions of clockwise rotation and counterclockwise rotation and the phase position of the crankshaft in real time and can measure the rotation speed of the engine.

A multi-frequency excitation field array electromagnetic non-destructive detection method for metal surface cracks, the method: 1) generate a standard defect at the center of the test piece; 2) connect the excitation device with the test piece to build a detection model; 3) The component is collected while the coil is excited, the detection signal of each data is extracted, and the EMD is used for empirical mode decomposition to obtain the intrinsic mode function signal; 4) According to the characteristics of the component data, the angle and axial direction of the crack defect are realized Accurate identification of length, circumferential length and radial length, and then convert the actual size of the defect; the invention uses a U-shaped yoke wound with a energized rectangular coil to excite the leakage magnetic field of the defect to realize the magnetic field disturbance above the defect. Signal collection, detection and identification of metal surface defects, improve the reliability of detection results, and have strong use value for electromagnetic nondestructive testing of specimens with complex defect shapes.