52 results about "Quantum sensor" patented technology

The present invention belongs to the technical field of rotation speed, acceleration speed measurement and inertial navigation, and relates to a quantum inertial sensor capable of measuring six-parameter inertial parameters and a measuring method thereof. The quantum sensor capable of measuring the six-parameter inertial parameters comprises two-dimensional microcrystalline glass vacuum chambers, a three-dimensional microcrystalline glass vacuum chamber, differential pumping tubes and alkali metal sources, the two two-dimensional microcrystalline glass vacuum chambers are connected with three-dimensional microcrystalline glass vacuum chamber by the differential pumping tubes, and respectively with the alkali metal sources, in addition, and the differential pumping tubes are prepared from microcrystalline glass same as the material of microcrystalline glass of the two-dimensional microcrystalline glass vacuum chambers and the three-dimensional microcrystalline glass vacuum chamber. By use of a scheme of counter-throwing of cold atomic groups and combination of manipulation of the cold atomic groups by Raman beams in different directions, and measurement of six-axis-space inertial parameters can be achieved. Based on low-temperature bonding technique, microcrystalline glass is used for constructing the vacuum chambers, so that the quantum inertial sensor has better light transmitting property, is more compact in structure, higher in thermal and magnetic stability and impact resistance, and more conducive to miniaturization.

A quantum detector array is provided. The array includes a semiconductor substrate and an epitaxial layer on the semiconductor substrate. The epitaxial layer includes a plurality of binary quantum sensor elements operable in breakdown mode to generate signals, logic elements, and a digital processing circuit. The binary quantum sensor elements each have a radiation-sensitive drift region and amplification region with a pn junction for detecting radiation from a radiation-emission source. The logic elements are each electrically interconnected to a corresponding binary sensor element of the plurality of binary quantum sensor elements for resetting the corresponding binary sensor element, generating digital information based on the signals received from the corresponding binary sensor element, and outputting the digital information. The digital processing circuit carries out digital processing of logic and time signals from the binary sensor elements.

The embodiment of the invention, which belongs to the field of electrical equipment, provides an insulation defect detection device and method for an electrical device. The insulation defect detectiondevice comprises a quantum sensor for detecting distribution characteristics of an electric field and/or a magnetic field intensity of an electric device, a laser generator for emitting laser light by the quantum sensor to excite the quantum sensor, a microwave transceiver for transmitting a microwave signal to the quantum sensor and receiving a microwave signal fed back by the quantum sensor, anelectron spin resonance spectrometer for starting the laser generator and the quantum sensor and acquiring distribution characteristics of the electric field and/or magnetic field intensity of the current transformer in space based on the fed back microwave signal, and a processor for determining whether the electrical device has a defect based on the detected distribution characteristics and determining the type of the defect if the electrical device has a defect. With the insulation defect detection device, the distribution characteristics of the electric field and the magnetic field of theelectrical device can be detected and the defect type of the electrical device is determined.

The invention discloses a graphene infrared sensor based on a photonic crystal photoresponse enhancement technology and a preparation method thereof. The graphene infrared sensor comprises a silicon wafer. An insulation layer is set on partial silicon wafer. An electrode layer is set on the insulation layer. When the silicon wafer with a silicon dioxide layer is selected, the electrode layer is directly formed on the partial silicon wafer. A photosensitive nano-graphene material layer is set on the partial electrode layer and the partial silicon wafer. Photonic crystal parts prepared through photoetching are set on all the rest electrode layer, the photosensitive nano-graphene material layer and all the rest silicon wafer. According to the graphene infrared sensor, a new-type nano-graphenematerial is taken as a photosensitive material and photonic crystals are added to gather infrared rays of specific wavelengths, so a photoresponse rate is improved, a preparation process is simple, the cost is low, and the graphene infrared sensor is a quantum sensor without refrigeration.

The embodiment of the invention provides an insulation defect detection device and method for a transformer bushing. The insulation defect detection device comprises a quantum sensor, an electron paramagnetic resonance spectrometer and a processor, wherein the quantum sensor is arranged on the outer surface of the transformer bushing; the electron paramagnetic resonance spectrometer comprises a laser generator and a microwave transceiver, and is used for controlling the laser generator to emit laser to the quantum sensor to excite the quantum sensor, controlling the microwave transceiver to emit a microwave signal to the quantum sensor and receive a microwave signal fed back by the quantum sensor, and obtaining the distribution characteristics of the electric field and/or magnetic field intensity of the transformer bushing; the processor is used for judging whether or not the transformer bushing has a defect based on the distribution characteristics and determining the defect type in the condition that it is judged that the transformer bushing has a defect. The insulation defect detection device can conduct detection based on the distribution characteristics of the electric field and/or magnetic field of the transformer bushing and figure out the defect type of the transformer bushing.

The invention relates to a geometrical physical property multi-feature parameter extraction method for a multi-phase medium, and aims to extract geometrical features and physical property parameters of an underground multi-phase medium at the same time and improve the accuracy of geological identification. Based on a generalized equivalent polarization model, an underground medium is defined to be composed of surrounding rock, a strong polarization medium and a weak polarization medium; time domain magnetic field response of the double-phase and multi-phase media is calculated under trapezoidal wave excitation, and a target function is formed with magnetic field data acquired by the superconducting quantum sensor; urrounding rock conductivity is calculated as a constraint condition according to the actually measured magnetic field early data; and aiming at the multi-dimensional and less-constraint conditions of extracted parameters, dimensions are set to correspond to a double-phase medium and a multi-phase medium respectively, parameter extraction is carried out by adopting a quantum particle swarm optimization algorithm respectively, and a double-phase medium extraction result is used as a constraint condition during multi-phase medium extraction. The method better conforms to the intrinsic characteristics of underground multiphase media, global extraction of multidimensional parameters is effectively achieved, and the extraction speed and accuracy are improved.

The invention discloses steel wire rope nondestructive testing equipment, a system and a method, and belongs to the field of nondestructive testing. The equipment comprises a first magnet unit and a second magnet unit, the first magnet unit and the second magnet unit are oppositely arranged, and the first magnet unit is provided with an NV color center quantum sensor. The system comprises the steel wire rope nondestructive testing equipment and a light path processing box, wherein the light path processing box is connected with the steel wire rope nondestructive testing equipment. The method comprises the steps that a steel wire rope is placed in a cavity and guided by a following guide wheel to move, and meanwhile, the NV color center quantum sensor and a stroke sensor are used for collecting data; the NV color center quantum sensor and the stroke sensor are adopted to transmit collected data to the light path processing box, and the light path processing box is adopted to process the data to obtain a detection result. The defect that in the prior art, the nondestructive testing precision of the steel wire rope is not high is overcome, and high-precision nondestructive testing of the steel wire rope can be achieved by conducting high-precision measurement on the steel wire rope.

The invention discloses a quantum sensing networking method based on a wavelength division multiplexing entangled light source, and the method achieves the output of multi-wavelength entangled photons in frequency domain comb distribution through the spontaneous nonlinear effect in a nonlinear microcavity. Every two paired entangled single photons with equal frequency intervals are distributed to different point positions through a mature dense wavelength division multiplexing system in a classical optical fiber communication system, quantum sensors represented by wavelength-independent quantum interferometers are arranged at the different point positions, and networking interconnection of the quantum sensors is achieved through quantum entanglement distribution. Sensing information of all point locations in the quantum sensing network can be obtained from any point location, and leading-edge applications such as distributed cooperative sensing and the like are achieved. According to the invention, the independent quantum network server, the multi-point distributed quantum interferometer and the on-demand controlled single-photon detector are utilized, the topology variable distributed quantum sensing network function is realized, the application range of quantum communication and a quantum network is expanded, and a solution is provided for the integrated fusion of quantum Internet construction and quantum information technology.

It is an object of the invention to improve processes, apparatuses and systems for measuring a measured variable. To this end, a measured variable is measured in a measuring process on the basis of an NV center as a quantum sensor. The NV center has a plurality of quantum states and is optically excitable on the basis of an occupancy of one of the quantum states into at least one excited state of the quantum states by means of an excitation light. The at least one excited state can decay at least with emission of emission light of the NV center. In the measuring process, the NV center is irradiated by the excitation light, the excitation light having a time periodic modulation, and a respective occupancy probability and/or a respective lifetime of the quantum states depending on the measured variable and the excitation light. A phase shift is determined between the emission light of the NV center and the modulation of the excitation light and a measurement value for the measured variable is determined on the basis thereof.

The invention provides a semiconductor laser generation device, which comprises a laser, a temperature sensor, a heat sink, an electric heating plate, a temperature measurement unit and a temperaturecontrol unit. The heat sink is stacked between the laser and the electric heating plate, and the two opposite surfaces of the heat sink closely fit the laser and the electric heating plate respectively. The electric heating plate is electrically connected with the temperature control unit. The semiconductor laser generation device cancels a TEC temperature control module with strong magnetism. Thetemperature measurement unit uses a high-frequency AC signal to excite the temperature sensor to avoid the generation of a low-frequency AC induced magnetic field during temperature measurement. Thetemperature control unit uses a high-frequency AC signal to drive the electric heating plate to avoid the generation of a low-frequency AC induced magnetic field during temperature control. Thus, it is ensured that the laser source itself does not introduce magnetic field bias or magnetic field noise, the accuracy of the sensor is improved, and the requirement for the application of quantum sensors in fields sensitive to magnetic field is met.

The embodiment of the invention provides an insulation defect detection apparatus and method for a current transformer. The insulation defect detection apparatus comprises a quantum sensor arranged near a current transformer, a laser generator for emitting laser to the quantum sensor to excite the quantum sensor, a microwave transceiver for transmitting a microwave signal to the quantum sensor andreceiving a microwave signal fed back by the quantum sensor, an electron spin resonance spectrometer for starting the laser generator and the quantum sensor and acquiring distribution features of theelectric field and/or magnetic field intensity of the current transformer in space based on the fed back microwave signal, and a processor for determining whether the current transformer has a defectbased on the detected distribution features of the electric field and/or magnetic field intensity and determining the type of the defect if the current transformer has a defect. With the insulation defect detection apparatus, the distribution features of the electric field and the magnetic field of the current transformer can be detected and the defect type of the current transformer is determined.