30results about How to "Strong ability to suppress noise" patented technology

This invention relates to one whorl flowmeter signal process system based on DSP intelligent and low cost, which is characterized by the following: analogue signal adjusting module, DSP chip and expanding RAM, EEPROM, low voltage monitor circuit, LCD display, keyboard input, analogue output, impulse output and power management module. The system adopts circle spectrum analysis and digital filter combination method to process the output signals of the flowmeter sensor.

The invention relates to the technical field of nuclear magnetic resonance groundwater detection, in particular to a magnetic resonance denoising method and device based on a modeling inverse recoverytechnology. The method comprises the steps that an acquired ground magnetic resonance signal and a reference signal are processed through an orthogonal vector type lock phase amplifier to obtain an output signal; the output signal processed by the orthogonal vector type lock phase amplifier is subjected to inverse recovery transformation to obtain an in-phase output signal and an orthogonal output signal; the collected ground magnetic resonance signal and the reference signal are multiplied and subjected to LPF filtering, and the orthogonal output signal is obtained through the inverse recovery transformation; all parameters of the magnetic resonance signal are extracted from the in-phase output signal and the orthogonal output signal. The problem of directly using the lock phase amplifier to cause distortion of the magnetic resonance signal is avoided. Compared with traditional magnetic resonance denoising methods, the denoising method can detect signals from a strong noise environment in one step.

The invention relates to a super-resolution thermal infrared imager and in particular relates to a super-resolution thermal infrared imager based on atmospheric turbulence correction. The super-resolution thermal infrared imager comprises a large-caliber protection window, a wavefront modulation system, an infrared optical system, an area array infrared detector focal plane and a refrigerator which are sequentially arranged along the optical axis direction, and a system circuit component which is simultaneously connected with the array infrared detector focal plane and the refrigerator, wherein the wavefront modulation system is connected with the array infrared detector focal plane. The super-resolution thermal infrared imager has the main advantages that 1, the influence of the atmospheric turbulence is overcome, the phenomena of image blurring, flash and the like are eliminated, and the image resolution ratio is improved, so that the output infrared image is clear and enriched in details; 2, the resolution ratio of the infrared image can be close to the diffraction limit of the optical system; 3, the performance of the thermal infrared imager is obviously improved; 4, an optical scanning mechanism is saved, and the thermal infrared imager is simple in structure, small in size and low in engineering realization difficulty and has high reliability and high practicability.

The invention relates to baseband signal processing device and method of a multiple-mold communication system. The method comprises the following steps of: forming a baseband signal and a control word used in network maintenance into an Ethernet frame; sending the Ethernet frame which is formed by the baseband signal and a control word and processed through an Ethernet physical layer to opposite equipment; and acquiring data from corresponding Ethernet frame positions in the opposite equipment, restoring into the baseband signal, and meanwhile solving the control word to maintain a network of this level. In the invention, a multiframe structure is utilized to realize signal transmission and different requirements on bandwidths can be satisfied; the control word is defined in the multiframe, and the use of the control word can enrich network modes of a system level and greatly facilitate the maintenance of the whole network.

The invention relates to the fields of vector hydrophones, anti-magnetic levitation and eddy current sensors, in particular to a magnetic suspension two-dimensional displacement vector hydrophone. The invention includes a shell part, an inner cylindrical shell part and an interlayer part; wherein, the shell part is a cube with holes reserved around the sides and complete upper and lower surfaces; the inner cylindrical shell part is made of non-magnetic metal material, and is installed in the geometric center inside the shell part , its side circumference is not tangent to the shell part, but a certain gap is reserved; the interlayer part is located between the shell part and the inner cylindrical shell part; the present invention can increase the measurement dimension, increase its sensitivity, and has a The suspension of the hydrophone is improved, and it has the advantages of high installation stability, small size, high sensitivity of low frequency and very low frequency, etc.

The invention discloses a method for detecting fracture-vug development zones based on iterative three-parameter wavelet transform, which includes: using three-parameter wavelet transform instead of conventional wavelet transform for calculation, performing edge detection processing on the horizontal and vertical sides of 2-dimensional seismic slices at the same time, The root mean square of the horizontal and vertical edge detection results is used as the final edge detection result, and then the wavelet transformation is performed twice, and the edge-preserving and denoising processing is performed on the wavelet transformation result array to obtain the final edge detection result. array, use the resulting array to describe the fracture-vuggy body development zone. The invention adopts the three-parameter wavelet transform instead of the conventional wavelet transform for calculation, overcomes the defect of poor matching of seismic data in the prior art, and improves the precision of edge detection.

The invention discloses a feedback prediction controlling method of self-adaptation condition based on noise estimation, which comprises the following steps: A. utilizing Singular Pencil Model to represent real controlled course; B. adopting recurrence expanded Kalman filter parameter estimation method to estimate the real controlled condition and model reference through Singular Pencil Model; C. utilizing the estimated condition and model parameter to calculate the present control action; adding the calculated control action into the controlled course; D. repeating the step B and C in the next executing period; realizing the feedback prediction controlling method of self-adaptation condition in the real controlled course. The invention improves the noise inhibiting ability through controlling method greatly, which reduces the calculating quantity for industrial application conveniently.