126results about How to "Large detection depth" patented technology

The invention discloses a 'four-step' large-scale method for locating and detecting deep hydrothermal ore deposits or ore bodies. Deep ore deposits or ore bodies are directly located and detected through four stages, namely, ore deposit forming rule research, fine analysis of ore forming structure, altered lithofacies mapping and structural geochemical fine exploration, and geophysical deep detection and concealed ore location prediction. The method is based on a large-scale (1:200-1:50000) progressive deep-buried ore deposit or ore body location and detection technology integrating 'ore deposit model prediction, structure prediction, altered lithofacies mapping and structural geochemical fine exploration, and geophysical exploration'. A systematic deep ore exploration technology is realized.

The invention discloses a double-focusing beamforming method based on self-adaptive weighting. An amplitude apodization technology, a virtual array element technology and a self-adaptive weighting method are introduced into an ultrasonic imaging system, and ultrasonic imaging of self-adaptive weighting double-focusing beamforming is realized by two-times delay superposition on the basis of a dynamic focusing technology. The double-focusing beamforming method comprises the following steps of: firstly, extracting effective information of a plurality of superposed sound fields by using the virtual array element technology; secondly, performing fixed-point focusing after performing amplitude apodization on the extracted information during first focusing; and finally, generating self-adaptive weighting coefficients by using a self-adaptive beamforming algorithm according to beamforming signals of the first focusing, and performing self-adaptive weighting beamforming focusing on the beamforming signals of the first focusing again so as to obtain data of finally imaged scanning lines. By the method, the shortcoming that a near-field region has severe pseudomorphism when the traditional double-focusing method based on virtual array elements is implemented is overcome, and an ultrasonic imaging effect is remarkably improved.

The invention provides a ground-and-air nuclear magnetic resonance underground water detecting system and a ground-and-air nuclear magnetic resonance underground water detecting method. The system comprises two grounding electrodes which are connected with a transmitter through transmitting lead. The transmitter is controlled through a ground master control system. The transmitter transmits excitation current with frequency of local Larmor frequency to ground through changing emission current of the grounding electrodes. A receiving coil which is loaded on an aerial vehicle acquires a nuclear magnetic resonance signal which is generated by magnetic moment precession. The ground master control system performs remote controlling on transmission and stoppage of the excitation current through a communication module. The ground master control system makes a receiver which is connected with the receiving coil acquire the nuclear magnetic resonance signal in a gap when the excitation current is stopped through the communication module. The acquired nuclear magnetic resonance signal is transmitted to an upper computer through the communication module. The ground-and-air nuclear magnetic resonance underground water detecting system and the ground-and-air nuclear magnetic resonance underground water detecting method has advantages of large ground transmitting and detecting depth, high resolution, wide air receiving and detecting range, high detecting speed and effective underground water resource detecting range.

The invention discloses a comprehensive prospecting method for multi-metal minerals, and provides a prospecting method integrated with a mineralization system, water system sediment measurement, rockdebris measurement, large-scale geophysical and chemical prospecting profile/high-precision magnetic survey and engineering verification, and a huge prospecting breakthrough is obtained in the prospecting process. Through the implementation of the combination method, the limitation of shallow coverage conditions on conventional geological mapping can be effectively avoided, a prospecting target area can be rapidly shrunk in a quaternary coverage area, and spatial positioning of a mineralization alteration zone and an ore-bearing geologic body is achieved, so that the prospecting success rate is increased accordingly, and the method has the advantages of being short in prospecting period, high in efficiency and low in prospecting cost and is suitable for prospecting of shallow vein-shaped copper-lead-zinc-silver-gold ores and skarn-type iron-copper ores; and the wide-area electromagnetic method has the absolute advantage of large detection depth, and is suitable for exploration of deepconcealed porphyry type copper-molybdenum ores by combining an ore prospecting prediction geological model established according to geological characteristics and a speculated concealed ore-bearing porphyry body range.

The invention belongs to a uranium ore exploration method and particularly discloses a method for combined tracing exploration on a hydrothermal uranium ore through geochemical elements. The method comprises the following steps of: measuring a uranium component in soil in an exploration area; measuring 210Po; drawing a plane isoline graph of the uranium component and the 210Po element; judging whether an ore-induced uranium component is abnormal or not according to the ratio between the uranium component and uranium total amount; if the ore-induced uranium component is abnormal, further judging (1) whether the uranium component has an abnormal concentration center or not according to a uranium component isoline graph, judging (2) whether the uranium component and the 210Po are abnormally combined or not according to a 210Po isoline graph, and judging (3) whether a uranium component abnormal area and a beneficial ore-forming fracture structure alteration zone correspondingly compound asection; and if at least two results of the steps (1) to (3) are positive, judging that the hydrothermal uranium ore exists. The hydrothermal uranium ore of which the covering layer is 10 meters to several hundred meters can be detected by extracting and measuring the uranium component and the 210Po in a surface soil sample.

The invention belongs to the field of geology and relates to a method for prospecting through deep penetration inside the earth. The method comprises the following steps of: collecting and analyzing geo-gas particles; after a molybdenum mesh to which a carbon film is attached serving as a sampling carrier adsorbs geo-gas particle samples brought by underground air stream, detecting the geo-gas particle samples on the molybdenum mesh by using a transmission electron microscope; and analyzing the particles on the microscope in a single particle state to judge the characteristic of a concealed ore body. Due to the adoption of the method, the test accuracy is enhanced, a test object reaches geo-gas nano-scale single particles, and the concealed ore body is comprehensively explored by analyzing characteristics, such as components, granularity and shape of particle ore, ratio and polymerization of various particles and the like, chemical components (including major elements and microelements), content, structural forms and mineralization types.

The invention discloses a method and instrument for controllable source neutron logging during drilling. The method comprises the steps that a pulse neutron source on a drill collar is started and quantitative high-energy neutrons are emitted to a stratum in a pulse mode; the number of thermal neutrons with the speed reduced by the stratum is measured through a long spacing detector and a short spacing detector which are arranged on the drill collar respectively, wherein the thermal neutrons are scattered back to a well hole; according to the number, measured through the two spacing detectors, of the thermal neutrons, the macroscopic capture cross section sigma of the thermal neutrons and the porosity phi of the stratum are obtained; the stratum water saturation Sw is obtained according to the macroscopic capture cross section of the thermal neutrons and the porosity phi. The instrument comprises the pulse neutron source, a detection unit, a signal processing and data analyzing unit and a power module used for supplying power for the detection unit and the signal processing and data analyzing unit. The thermal neutrons are detected through the long spacing <3>He thermal neutron detector and the short spacing <3>He thermal neutron detector, two sets of parameters including the porosity and the macroscopic capture cross section of the thermal neutrons and are obtained, and therefore the measurement of the water saturation and the porosity of the stratum with a relatively low degree of mineralization is achieved. Due to the use of the pulse neutron source, damage, caused by a radioactive source, to human and the environment is eliminated.

The invention discloses a method for detecting the integrity of a rock mass of a deep-buried tunnel. The method comprises the following steps of: (1) obtaining a high-frequency magneto-telluric field signal of an earth surface to be detected; (2) carrying out pre-processing on the high-frequency magneto-telluric field signal to obtain a high-frequency magneto-telluric resistivity curve; (3) revising the high-frequency magneto-telluric resistivity curve and obtaining a real resistivity of the rock mass according to the revised high-frequency magneto-telluric resistivity curve; and (4) calculating an integrity coefficient of the rock mass according to the real resistivity of the rock mass. The method for detecting the integrity of the rock mass of the deep-buried tunnel, disclosed by the invention, has the advantages of wide applicable range, high accuracy and high safety.

The invention discloses a towed underwater geological electrical method detection system and a method. The system includes: an underwater electrical cable, simple underwater electrodes, water pressuremeasurement and sensing units, an electrical cable floating and sinking unit, an underwater GPS positioning system, an inflator, an electrical method data collection and storage module and a data processing module. The underwater electrical cable is fixed with the electrical cable floating and sinking unit. The electrical cable floating and sinking unit is connected with the inflator. The underwater electrical cable is connected with the electrical method data collection and storage module and the data processing module in turn. The simple underwater electrodes and the water pressure measurement and sensing units are fixed on the underwater electrical cable. The underwater GPS positioning system includes responders, a shipboard transducer and a GPS. The responders are fixed at simple underwater electrodes of a front part, a middle part and a tail part on the underwater electrical cable. The responders are connected with the shipboard transducer in a wireless manner. The GPS is fixed on a tugboat. The towed underwater geoelectrical detection method and the method provided by the invention systematically solve the deficiencies and the problems still existing in current underwater geological electrical method detection, and have good application prospects.

The invention discloses a radar device used for real-time detection of a road structure layer thickness. The device includes a trolley. A data acquisition unit, a data processing unit and a distance sensor are installed on the trolley, wherein the data acquisition unit is controlled by the data processing unit; and the data acquisition unit includes a radar control module, a wireless module and a power supply module. The invention also discloses a method used for real-time detection of the road structure layer thickness. The radar device is high in universality, convenient to carry and capable of offering layer thickness data in a real-time manner without follow-up processing. The method not only has a plurality of advantages of high distinguishing capability, high detection precision, high detection depth and convenient operation and the like, but also realizes change from manual explanation to software automatic explanation, and from postprocessing to real-time processing of radar data through special-purpose real-time road structure layer thickness detection software.

The invention relates to a double-couple source ground-well transient electromagnetic detection method, which includes the following steps: a grounding lead is placed in a ground area corresponding toa roadway to be detected which is located underground as a double-electric dipole emission source used for generating an electromagnetic field; at a top plate, a bottom plate and/or a lateral wall ofthe roadway to be detected, receiving devices are arranged along the roadway direction, and the receiving devices include single or a plurality of receiving probes, and can collect electromagnetic signals received by each of the receiving probes; bipolar pulse current is applied to the double-electric dipole emission source to excite an electromagnetic field; an underground medium is subjected toinduction of the electromagnetic field to generate an induction electromagnetic field, and the underground medium includes ground or a detection target layer/body; each of the receiving probes measures the induction electromagnetic field to obtain characteristics of the induction electromagnetic field which change with time; by analysis of the characteristics changing with time, electrical characteristics of the underground medium are extracted; and according to the electrical characteristics, the spatial distribution and extending direction of the underground medium are judged.

The invention relates to a transient electromagnetic method (TEM) technology and discloses a detection device based on the TEM. The device comprises a transmitting antenna for generating a transient electromagnetic field and a receiving antenna for receiving a secondary electromagnetic field excited by the transient electromagnetic field, wherein the transmitting antenna consists of a coil array which is composed of at least two coils; and an electromagnetic field generated by the coil array is converged towards a set area. According to the detection device based on the TEM, a single coil of a primary field transmitting antenna of the TEM is modified into the coil array consisting of a plurality of coils, and related parameters of various coils in the array are adjusted, so that the generated electromagnetic field vectors are superposed and converged to the set area, and the divergence of the electromagnetic field generated by the transmitting antenna is greatly improved; and therefore, the coverage range of the primary field is constrained, and the converging performance of the transmitting antenna is improved. The detection device is mainly used for the field of electromagnetic detection, such as prospection, underground pipeline detection, metal detection and the like.

A nuclear magnetic resonance well logging machine probe permanent magnet for generating gradient magnetic field in ground layer, engaged with nuclear magnetic resonance well logging machine to check the physical information of ground layer, is characterized in that a magnet post (86)is composed of adhered at least one small magnetic block (6), wherein the magnet is one portion of one cylinder. The invention sticks the magnet on well wall, while the magnet is N30 high-energy-accumulation samarium-cobalt magnet, with small volume, strong magnetic field, and high detection length. The invention simplifies the probe structure, improves the bearing strength of whole probe, improves the length of pre-polarized magnet, and improves detection speed, which can avoid blind area at the well wall direction, to improve detection accuracy, and generate gradient magnetic field along the well wall, to realize multi-dimension well logging.

The invention discloses a full-scan opto-acoustic double-mode endoscopic probe. The endoscopic probe comprises an ultrasonic transducer, an incident optical fiber and a cone surface reflector; the axial outer side of the ultrasonic transducer is sleeved with a tube shell, and the ultrasonic transducer is rotatably arranged on the inner side wall of the tube shell; emergent light of the incident optical fiber penetrates through the ultrasonic transducer to irradiate the sphere center of a hemispherical inwards-concave surface; a reflection cone surface is arranged at the sphere center position of the hemispherical inwards-concave surface, and incident light of the incident optical fiber reflects on the reflection cone surface and then is vertically emitted to a to-be-tested portion from the side wall of an endoscope; an ultrasonic vibration element is arranged on the inwards-concave surface of the outer side of the center of the hemispherical inwards-concave surface and synchronously rotates with the cone surface reflector, and ultrasonic waves sent by the ultrasonic vibration source are reflected by the reflection cone surface and then obliquely emitted to the to-be-tested portion from the side wall of the endoscope. According to the endoscopic probe, the technical problem that the imaging contrast ratio and imaging depth of the endoscope cannot be obtained simultaneously is solved.

Magneto-elastic amorphous alloy material and a preparation method thereof are provided. The material is composed of FexReyBz, wherein, Re is one or more than two of La, Sm, Tb, Dy and Y. The preparation method is to mix and melt the FexReyBz into master alloy according to the atom percentage, produce amorphous wires on self-developed wire spraying equipment, strengthen internal stress through drawing the wires and improve the magneto-elastic performance of the wires. The material is provided with the 10<-3> vertical large magnetostrictive coefficient. And through the quenching and rapid setting preparation method, extremely large inner stress gradient from the surface to the core of the wires is made. The material is also provided with large inner stress anisotropy performance, and part of magneto-elastic performance is produced. The surface crystallization layer of the wires, the thickness of which is tens of nanometers to hundreds of nanometers, and amorphous matrixes produce magnetocrystalline anistotropy energies which strengthen the magneto-elastic performance of the wires. The material is provided with the vertical large magnetostrictive coefficient and makes use of a self-developed displacement sensor and a measurement instrument. Compared with the present import super-magnetostrictive displacement sensor, the sensor has the advantages of large investigation depth, high precision and strong vibration resistance capacity.

The invention belongs to the technical field of special instruments for petroleum logging construction and relates to an electromagnetic probe for a transient electromagnetic logging instrument. The electromagnetic probe is reasonable and compact in structure; the high-power launching capability of transmitting coils is enhanced, at the same time, secondary field voltage signal receiving accuracyis improved by means of comparative receiving coils; and assistance can be provided for casing damage detection and effective measurement of the formation resistivity of an open-hole well and a casedwell. According to the electromagnetic probe for the transient electromagnetic logging instrument of the invention, one set of transmitting coil system and two sets of comparative receiving coil systems are arranged in the electromagnetic probe, wherein any one set of comparative receiving coil system is composed of two receiving coils of which the winding directions are opposite to each other; and transmitting coils in the transmitting coil system and the receiving coils in the comparative receiving coil systems are coaxially wound on the same frame.

The invention relates to an ultrasonic linear phase array transducer for piezoelectric ceramics, and a preparation method thereof. The preparation method comprises the steps of cutting a piezoelectricceramic substrate into multiple transducer array elements so as to form a transducer array, wherein the width of each transducer array element and an interval between each two adjacent transducer array elements are 20 to 100mum, and the cutting depth is 50 to 300mum; cutting one side of the transducer array to obtain a bottom electrode coplane electric connection trough, wherein the width of thebottom electrode coplane electric connection trough is 20 to 300mum; filling adhesives among the transducer array elements, and filling a conductive adhesive into the bottom electrode coplane electricconnection trough; preparing a bottom electrode; thinning the thickness of a piezoelectric ceramic surface opposite to the bottom electrode, and reducing the thickness of the piezoelectric ceramic tobe 50 to 200mum; preparing a connecting surface of an upper electrode and the bottom electrode; dividing the transducer array to form multiple single ultrasonic linear phase array transducers; lead bonding the transducers; and sealing and filling a matching layer. The transducer provided by the invention is high in detection resolution, large in detection depth, and capable of being used for ultrasonic detection of a microscale feature structure.

The invention relates to a joint inversion method of aviation TEM and aviation MT. The method comprises the following steps of measuring the same area by simultaneously using the aviation TEM and theaviation MT, obtaining two sets of data of the aviation TEM and the aviation MT through two measurement methods, processing the two sets of data to respectively obtain an apparent resistivity profileand an apparent resistivity three-dimensional map of the aviation TEM, and a two-dimensional inversion apparent resistivity profile and an apparent resistivity three-dimensional map of the aviation MT, forming an initial model by taking the two-dimensional inversion apparent resistivity three-dimensional map of the aviation MT as a deep part and constraining a shallow part by the apparent resistivity data of the aviation TEM, performing the joint 3D inversion on the initial model to obtain three-dimensional joint inversion resistivity profiles of the aviation TEM and aviation MT, and finally analyzing a low-resistance anomaly region according to the three-dimensional joint inversion resistivity profiles of the aviation TEM and aviation MT and the geological data. The joint inversion methodcan simultaneously have a large detection depth and a high resolution, thereby obtaining accurate data and obtaining accurate analysis results.

The invention discloses an emission module for ultrasonic diagnosis equipment, comprising an emission control unit and a transmit element connected with the emission control unit; wherein, the emission control unit is used for generating control signals transmitted to the transmit element; the transmit element is used for transmitting pulse waveform which comprises at least five different levels according to the received control signals. The invention has the advantages of forming various forms and types of wide pulse waveforms, ensuring the transmitting energy of the emission module, and increasing the acquisition depth of human tissues by adopting different pulse waveforms which comprises at least five different levels; moreover, the formed single pulse or bipolarity pulse has an obvious echo characteristic, and reduces the probability greatly that the echo signal is submerged by noise.

The invention provides an ultrasonic volume measuring probe and a measuring method thereof. The ultrasonic volume measuring probe comprises a special sound head which comprises more than two array transducers, and the array transducers are fixed in the probe and radially arranged in a plane in a staggered manner. Each array transducer is controlled by a signal collection control circuit to scan a section and acquire section information so as to acquire ultrasonic echo information of more than two sections of a ball, extracts boundary information of a bladder from the echo information through an information processing system, and calculates volume of urine in the bladder to complete measuring of capacity of the urine in the bladder. The defects brought by a mechanical probe are overcome, and the ultrasonic volume measuring probe is higher in speed and higher in measuring accuracy; due to a radially-staggered arranging mode of the array transducers, under the conditions that the number of the array transducers is equal and the radius of the probe is equal, area of a single array transducer is maximum; and under same conditions, best ultrasonic focusing effect and biggest probing depth can be realized.

The invention discloses a resistivity data fusion three-dimensional imaging method and system for landslide detection. According to the technical scheme, the method comprises the steps of: obtaining geophysical prospecting data according to a plurality of types of laid geophysical prospecting lines; preprocessing the geophysical prospecting data, and obtaining two-dimensional resistivity data through an inversion method; extracting resistivity data of multiple geophysical prospecting methods at the same position, and fusing the multiple types of resistivity data; and establishing a three-dimensional coordinate system, converting the fused two-dimensional detection data into three-dimensional detection data, and imaging the three-dimensional detection data to obtain a three-dimensional stereogram. Two-dimensional detection data obtained through inversion by a transient electromagnetic method and a high-density electrical method are fused, three-dimensional detection data is obtained through a three-dimensional coordinate conversion formula, a three-dimensional stereogram is finally obtained after imaging of the three-dimensional detection data, and therefore the distribution range of a sliding surface in space is determined.

The invention discloses an extremely-low-frequency high-power transmitting system. The system comprises a high-precision exciter, a signal processing unit, a transmitting host, a change-over switch, a tuning device and a dummy load; the tuning device is connected with a transmitting antenna; the transmitting host comprises two power amplifier units which are arranged in a dual-frequency-band dual-power-bridge cascading mode, and the two power amplifier units are used for conducting high-power signal synthesis on the extremely-low-frequency band and the ultra-low-frequency band on a power amplifier circuit of the same transmitting host. According to the invention, the high-power extremely-low-frequency emission host with extremely-low-frequency and ultra-low-frequency dual-band dual-power bridge cascade power synthesis is designed, and efficient synthesis of extremely-low-frequency and ultra-low-frequency (0.1-300Hz) dual-band 500kW high-power signals is realized on the same main power circuit. A combined tuning method of direct coupling, capacitance tuning and matching tuning is designed to perform matching tuning with a horizontal low-rack transmitting antenna as long as hundreds of kilometers, so that impedance matching tuning of a full-frequency-point horizontal low-rack transmitting antenna within a wide frequency range of 0.1Hz to 300Hz and efficient radiation of high-power extremely/ultra-low frequency signals are realized.

The invention relates to equipment for an oil field, in particular to a special underground cable environment detecting instrument for an oil field well site. The detecting instrument comprises a transmitter and is characterized in that a bottom plate of a shell of the transmitter is a metal plate, other parts of the shell are made from insulating materials and an output end of the transmitter isconnected with the bottom plate. Compared with the prior art, the special underground cable environment detecting instrument for the oil field well site has the advantages of large signal intensity, large detection depth, safety and reliability.

The invention discloses a three-dimensional resistivity sounding application method based on a high-density electrical method Wenner device. According to the method, a three-dimensional resistivity data body is established through a high-density 2D resistivity instrument Wenner device and a high grid-density large-electrode pitch electrical sounding section; electrodes are arranged and converted into a symmetric quadrupole device; a non-uniform measurement network is constructed; and three-dimensional inversion is performed through the least square method. With such an observation method adopted, detection depth is increased, cost is reduced, the spatial characteristics of a geologic body are effectively reflected, and detailed information is provided for borehole layout.