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 relates to the technical field of signal control and provides a signal collecting and driving testing device. The testing device comprises a control terminal, a signal collecting card, a signal driving card, a relay collecting late, a relay driving plate and a guide rail type AC-DC (Alternating Current-Direct Current) power source. In the technical scheme of the invention, a relay dry node manner is adopted for ensuring the polarity of a switching value signal between tested equipment and testing equipment and / or power not to be limited by an opposite side; a relay input-output manner is adopted for realizing the electrical isolation between the tested equipment the testing equipment; in addition, by using a filter circuit, the microsecond-level signal collection is realized and is not affected by a microsecond-level pulse interference signal; and finally the amount of collecting and driving switching value signals of the signal collecting and driving testing device can be freely adjusted and configured; and the signal collecting and driving testing device can simulate gravity type relay equipment of a railway system and is small in volume and flexible to realize.

The invention relates to the technical field of engines and discloses an engine detonation signal processing method and device and an engine. The engine detonation signal processing method comprises the steps that a detonation signal is collected; the collected detonation signal is subjected to a first stage low-pass filtering; the detonation signal after the first stage low-pass filtering is converted to a digital signal, and second stage low-pass filtering is carried out; the detonation signal after the second stage low-pass filtering is subjected to band-pass filtering; and the detonation signal after the band-pass filtering is subjected to integration, and a energy value representing the strength of detonation in an air cylinder is obtained. According to the engine detonation signal processing method, the mode that the two-stage low-pass filtering and the first stage band-pass filtering are matched is adopted to process the detonation signal, the effect of removing interference is better, and the detonation signal is restored to a greater extent.

The invention belongs to atmospheric radiation environment monitoring and nuclear facility safety running monitoring systems and methods, and particularly relates to an atmospheric xenon enrichment and purification method and device and a method for preparing a carbon molecular sieve. The atmospheric xenon enrichment and purification method mainly includes the steps of air pretreatment, three-level concentration, separation and purification, sample preparation and online stable xenon detection. M hollow fiber nitrogen-enriched membrane components of the same type and / or different types are connected in series and / or in parallel for separation in the air pretreatment process. The carbon molecular sieve is used as an adsorbent in the step of separation and purification. The problem of low enrichment efficiency of an existing atmospheric xenon enrichment and purification method and device is solved, the quantity of xenon acquired in 24 hours by the system is not smaller than 10mL, xenon volume-by-volume concentration is not lower than 30%, and quantitative uncertainty of stable xenon is less than 10%.

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.