9results about How to "Large detection depth" patented technology

The invention discloses a multi-channel transient electromagnetic detection method and device for a tunnel face, and relates to the technical field of geophysical information, and the method comprises the steps: planning horizontal measuring lines for the tunnel face at equal intervals, and planning measuring points on each measuring line at equal intervals; building a multi-channel detection array composed of a transient electromagnetic receiving coil and a transient electromagnetic transmitting coil, and carrying out primary field zero magnetic flux point adjustment; the method comprises the following steps: setting emission parameters according to detection depth and resolution requirements, then emitting bipolar square waves, carrying out measurement point-by-measurement observation by using an adjusted multi-channel detection array, constructing a geometric network which takes measurement lines, measurement points and channel numbers as indexes according to observation data, and carrying out multi-channel combined three-dimensional imaging. By constructing a multi-channel detection array, the data volume of a measuring point is increased, and the fineness of three-dimensional imaging is improved; through primary field zero magnetic flux point adjustment, the influence of a primary magnetic field is counteracted, and the signal-to-noise ratio of data is improved.

The present invention belongs to the field of rock and soil detection, and provides a downhole borehole nuclear magnetic resonance detection device and working method. The device includes a transmitting system, a transmitting coil, a receiving system, a receiving probe, a control system and a processor; the control system is connected to the transmitting system and the receiving system respectively; the transmitting system is connected to the transmitting coil, which is arranged on the face of the tunnel and is used to transmit a pulse signal of set frequency and amplitude; the receiving system is connected to the receiving probe, which is arranged in the borehole of the face of the tunnel and is used to collect the echo signal of the pulse signal and transmit it to the processor through the receiving system; the processor is used to obtain the detection result data according to the echo signal and analyze the imaging to identify the groundwater source.

The invention discloses a roof water disaster hidden danger detection method by a double-source direct-current resistivity method, which is characterized in that emission source electrodes are simultaneously arranged in an earth surface and a mine tunnel to form an up-down coupled current field, so that the permeation of current in a deep stratum is obviously enhanced, and meanwhile, the detection depth is effectively expanded; and meanwhile, the detection precision of water disaster hidden dangers of a deep area, especially a deep roof, can be remarkably improved, and accurate positioning and quantitative evaluation of the hidden dangers are realized. The multi-path response of the geologic structure to the current is fully utilized, so that the collected data contain richer geologic information, and the recognition capability of the deep geologic structure and the water disaster hidden danger can be improved.

The invention belongs to the technical field of controllable seismic sources, and particularly provides a seismic source system and a control method and device thereof, a storage medium and electronic equipment, and the seismic source system comprises a liquid source, a vibration execution part, a first servo valve, a second servo valve and a control assembly. The vibration execution part comprises a first hydraulic cavity and a second hydraulic cavity; the first servo valve comprises a first control port, a first liquid inlet and a first liquid outlet, the first liquid inlet is communicated with a liquid source, and the first liquid outlet is communicated with the first hydraulic cavity; the second servo valve comprises a second control port, a second liquid inlet and a second liquid outlet, the second liquid inlet is communicated with the liquid source, and the second liquid outlet is communicated with the second hydraulic cavity; the control assembly is electrically connected with the first control port and the second control port, and the control assembly is used for controlling the opening degree of the first servo valve and the opening degree of the second servo valve. A double-valve-body structure is adopted, the odd harmonic distortion degree is reduced, the deep geological structure recognition precision is improved, and technical support is provided for high-resolution oil and gas reservoir exploration.

The invention provides a spectrum inversion high-resolution processing method based on strong axis stripping, and relates to the field of seismic exploration, and the technical scheme is that the spectrum inversion high-resolution processing method based on strong axis stripping is characterized by comprising the following steps: inputting original seismic data, and extracting strong reflection wave event seismic data; subtracting the extracted strong reflection wave event seismic data from the original seismic data to obtain seismic data after strong reflection suppression; replacing the original seismic data with the seismic data subjected to strong reflection suppression, and establishing a spectrum inversion objective function; and solving the spectral inversion objective function to obtain a high-resolution seismic section which suppresses strong reflected waves and highlights weak signals. The method has the advantages that a spectral inversion high-resolution processing mechanism based on strong axis stripping is clear, and time domain iteration deconvolution stripping of the strong reflection wave event, spectral inversion high-resolution processing stripping of the strong reflection wave event, strong reflection suppression and spectral inversion high-resolution thin layer recognition are involved.

The present application provides a line-field confocal OCT device, which relates to the field of medical diagnosis technology. The key points of its technical solution are: including a light source module for providing a line beam; a beam splitting module for receiving the line beam and splitting the line beam into a reference beam and a sample light; a reference module for receiving the reference light and reflecting the reference light to the beam splitting module, the reference module is connected to a first displacement mechanism for driving the reference module to move; a sample module for receiving the sample light, the sample light passes through the sample module into the sample tissue and is reflected back to the beam splitting module along the optical path, the sample module is connected to a second displacement mechanism for driving the sample module to move; an imaging module is used to receive the reference light reflected back by the reference module and the interference light formed by the sample light reflected back by the sample tissue on the beam splitting module, and generate an image based on the interference light. The line-field confocal OCT device provided by the present application has the advantages of high resolution and large detection depth.

The utility model belongs to petroleum logging instrument technical field discloses a kind of lanthanum bromide crystal detectors special for element logging instrument. Including lanthanum bromide crystal;Iron fluorine Long protective sleeve, it is cut along the center axis and is equipped with conical opening, to tightly wrap lanthanum bromide crystal and leave out light receiving surface in the side towards photomultiplier;Crystal shell assembly, for accommodating and protecting iron fluorine Long protective sleeve and lanthanum bromide crystal;Multiplying tube shell, with crystal shell assembly can be detached connection;Photomultiplier, located in multiplying tube shell and with multiplying tube shell gap cooperation, and by elastic component, so that photomultiplier and lanthanum bromide crystal are always tightly contacted;Probe end cover, one end with multiplying tube shell detachable connection, the other end with electronic skeleton detachable connection;And electronic skeleton, for fixed circuit board, circuit board and photomultiplier electric connection. The utility model's lanthanum bromide crystal detector special for element logging instrument structure is compact, anti-seismic, easy to maintain and light collection efficiency is high.

This invention discloses a geothermal detection device for geological exploration, comprising multiple symmetrically arranged hydraulic cylinders. Each hydraulic cylinder has a hydraulic adjusting rod slidably and sealed at its upper end. A drilling support is mounted on the upper end of the multiple hydraulic adjusting rods. A pressure sleeve is centrally and rotatably inserted into the drilling support. A drill rod is inserted into the lower end of the pressure sleeve. A soil-discharging auger is mounted on the outer wall of the drill rod, and a drill bit is mounted at the lower end of the drill rod. This invention increases the detection depth through multi-stage drill rod connections and uses a fixed communication connection between the multi-stage drill rods to enable unobstructed, direct, and accurate detection of the designated area. It is more reliable, has a simple structure, is easy to operate, and can achieve accurate geothermal detection at multiple depths.

The invention provides an ophthalmology measurement system based on a carrier frequency loading device, which comprises an OCT light source, a reference arm, a sample arm module, an optical fiber coupler and a detector, and is characterized in that the sample arm module is integrated with an optical path switching scanning device and can reflect detection light to a posterior segment or anterior segment optical path. The optical path is dynamically adjusted by introducing a carrier frequency adding device, the A-Scan optical path or phase change is kept constant, Doppler frequency shift is achieved, and the detection depth is enhanced without losing resolution. The system can quickly switch imaging focuses to adapt to eyes with different eyesight, and refraction compensation is carried out to obtain high-resolution OCT (Optical Coherence Tomography) images. In addition, the system can accurately measure key parameters such as corneal curvature, thickness, anterior chamber depth, crystalline lens thickness and the like, and the diagnosis speed is effectively improved. According to the invention, while the imaging quality is ensured, the limitations on detection depth, imaging speed and precision in the prior art are solved.