436 results about "Radiation emission" patented technology

Sensors used in sheet manufacturing environments can be sensitive to the gap between the scanner heads. Nuclear gauges measure both the sheet product and gas in the column between the scanner heads. The gap distance can affect the measurement in a linear or non-linear fashion depending on the sensing principle High frequency vibrations can cause the sensor devices therein to move. Techniques for controlling the sensor gap between operative surfaces on dual scanner heads during measurement operation employs a closed-loop control where piezoelectric actuators are used to maintain a constant gap throughout the scan by closing the error signal on the gap measurement sensor. A system for measuring a property of a continuous sheet includes dual scanner heads housing radiation emitters and receivers. Gap measurement signals energize the actuators that adjust the position of one or both sensor devices to maintain the gap at a desired distance.

A self-calibrating driver circuit (100, 300, 400, 500, 700) for a laser diode is disclosed. The circuit comprises a configurable current source (105, 305, 405, 505), a current mirror (115, 315, 415) configured to mirror a current from the configurable current source to a first transistor (120, 320, 420, 520, 720) and to a second transistor (125, 325, 425, 725), and a control circuit (140, 340, 440). The control circuit is configured to monitor a current through the first transistor at a first time, and to configure the current source based on the current through the first transistor to provide a desired current to the second transistor for driving the laser diode at a subsequent second time. A radiation-emitting device comprising one or more of the self-calibrating driver circuits and at least one radiation-emitting element is also disclosed.

The invention relates to the technical field of electromagnetic compatibility testing, and provides a current-based magnetic field radiation emission limit value cutting method and device and electronic equipment. Comprising the steps of obtaining working current parameters of tested equipment; determining a basic limit value of magnetic field radiation emission, obtaining a working current of the tested equipment when the magnetic field radiation is the basic limit value, and taking the working current as a reference current threshold value; when the working current parameter is greater than the reference current threshold value, calculating the clipping amount of the magnetic field radiation emission limit value based on the ratio of the working current parameter to the reference current threshold value; and cutting the basic limit value according to the cutting amount to obtain the magnetic field radiation emission limit value of the tested equipment. The limit value is compatible with the existing electromagnetic compatibility national military standard magnetic field radiation emission limit value, so that the electromagnetic compatibility test assessment of the large-current equipment can be evaluated more reasonably and accurately, and the method has high engineering application value.

Apparatus and methods are described for drilling deep boreholes with millimeter-wave radiation in earthen materials to access deep resources such as geothermal heat. Borehole depth and temperature at the bottom of the borehole can be monitored with probe signals and / or radiative emission from the bottom of the borehole.

The invention discloses a power electronic equipment radiation emission level evaluation method and device based on a reverberation chamber, a medium and equipment. The method comprises the following steps: acquiring a reverberation chamber radiation receiving power sample and a transmission coefficient sample; obtaining a radiation power calculation model of the to-be-tested power electronic equipment, constructing a radiation power function of the to-be-tested power electronic equipment, and obtaining a probability density function of a radiation power estimation value and an uncertainty model based on the radiation power function of the to-be-tested power electronic equipment; evaluating a first radiation emission level of the to-be-tested power electronic equipment based on the radiation power calculation model and the uncertainty model; the second radiation emission level is determined according to the radiation power function of the power electronic equipment to be measured, so that the statistical distribution characteristics of the electromagnetic field in the reverberation chamber can be accurately described, and the influence of the independent sampling number on the measurement uncertainty can be quantitatively analyzed; effective evaluation of statistical characteristics and measurement uncertainty of radiation emission of power electronic equipment is realized.

An example method to configure a radiography system having a radiation emitter and a radiation detector involves: analyzing, using processing circuitry, a reference image captured using a first value of a first power parameter for the radiation emitter to determine a value of a focal spot size for the radiation emitter; based on a determined relationship between the first value of the first power parameter and the value of the focal spot size, output an indication of whether a selected value of the first power parameter results in a value of an unsharpness parameter satisfying a threshold unsharpness value; and control the radiography system using the selected power parameter to perform a radiography process to obtain one or more radiographic images that satisfy the threshold unsharpness value.

The invention relates to the cross technical field of intelligent traffic and heat management, and discloses an airplane air-conditioned vehicle anti-overheating protection system based on a radiation refrigeration coating, comprising: a multilayer composite structure module, the multilayer composite structure module comprising a radiation refrigeration coating, a spectrum regulation and control structure layer and a heat conduction structure layer with adjustable heat conductivity; the environment sensing module is used for collecting the solar irradiation intensity and the temperature state outside the airplane air conditioner vehicle; the control module is used for generating a control instruction for adjusting the spectrum regulation and control structure layer and the heat conduction structure layer; the response execution module is used for outputting a control instruction according to the control module; and the state feedback module is used for monitoring the thermal physical state of the structure after adjustment in real time. A multi-layer composite heat management scheme based on a radiation refrigeration coating and a spectrum regulation and control structure is adopted, and effective reflection of external heat radiation and optimized dissipation of internal heat are achieved by intelligently and dynamically adjusting a heat flow path and radiation emission.

The present invention relates to a device for measuring a line current. Said device comprises at least three sensor elements having paramagnetic centres, a pump-radiation source, an optical system, and at least three photodetectors which function as part of receiving systems and are each associated with a sensor element. In addition, the device contains two magnetic field sources which generate different bias magnetic fields for each sensor element. The pump-radiation source emits pump radiation into the optical system, which distributes the pump radiation to the sensor elements and thereby irradiates the paramagnetic centres with the pump radiation. These centres emit fluorescence radiation, the intensity and phase shift of which depend on the AC drive signal of the evaluation and control device and on the magnetic flux density acting upon them. The fluorescence radiation is separated from the pump radiation by the optical system and guided onto the photodetectors. The evaluation and control device generates a single-frequency sinusoidal AC drive signal having a frequency of 22 MHz (-4 MHz / +7 MHz), or within a range of 18 MHz to 29 MHz. The lock-in amplifiers are coupled to the sensor elements and evaluate the output signal of the photodetectors with respect to the AC drive signal in order to produce measurement values. Based on these measurement values, the evaluation and control device determines an estimated value for the magnitude of the line current in the line.

The invention discloses a vehicle high-frequency electromagnetic radiation measurement method, device, equipment, medium and product, and relates to the technical field of vehicle test.The method comprises the steps that field uniformity verification is conducted on a whole vehicle electromagnetic reverberation chamber, it is determined that the field uniformity in a target frequency band meets the requirement, a tested vehicle needs to be parked in the whole vehicle electromagnetic reverberation chamber, and the tested vehicle needs to be parked in the target frequency band; all electric equipment which is not necessary for testing is closed by the vehicle; measuring the insertion loss of the whole vehicle electromagnetic reverberation chamber by using a vector network analyzer; performing a radiation emission test on the vehicle in the target frequency band, and receiving and recording test data by using an EMI receiver; and calculating the radiation emission power and the radiation field intensity of the vehicle based on the test data and the insertion loss.

An electron propulsion engine utilizes the acceleration of electrons to propel a spacecraft through space. The acceleration of the electrons in space emits electromagnetic radiation which can be used to propel the spacecraft. The radiation emission also decelerates the electrons, which allows the decelerated electrons to be recycled for reuse by the electron propulsion engine. The electron propulsion engine includes a first engine module, a second engine module, and an engine control system. The first engine module and the second engine module correspond to two mirror structures that form the electron propulsion engine. The engine control system facilitates the automatic control of the operation of the electron propulsion engine. The first engine module and the second engine module each includes a vacuum housing. The vacuum housing of each engine module is a D-shaped structure that facilitates the acceleration of the electrons and the resulting radiation emission to propel the spacecraft.

A circuit for monitoring an amount of charge provided to at least one radiation-emitting element configured to: determine a charge storage capacity of a charge storage device; measure a first voltage at the charge storage device before the at least one radiation-emitting element is driven; and measure a second voltage at the charge storage device after the at least one radiation-emitting element is driven. The circuit includes processing circuitry configured to determine an amount of charge provided to the at least one radiation-emitting element based on the charge storage capacity and a difference between the first and second voltages.

The invention discloses a field-circuit co-simulation method for radiation emission of an electronic product. The simulation method comprises the following steps: importing a PCB diagram; and designing the PCB diagram by using cartographic software according to a schematic diagram of an electronic product. And step S2, SIwave parameter extraction: carrying out SYZ parameter extraction on the key device of the PCB diagram. And step S3, Designer field-circuit co-simulation: carrying out simulation on the board-level far / near field radiation characteristics of the electronic product so as to determine the board-level radiation emission characteristics of the circuit board. And S4, performing HFSS field-to-field link simulation, and performing simulation on the radiation characteristics of the electronic product so as to complete product-level radiation emission simulation analysis. The method has the advantages that the simulation method is easy to achieve, the noise source deviation degree is low, the simulation result confidence degree is high, evaluation of the electromagnetic compatibility radiation emission level of the product is rapidly achieved, and a reliable theoretical basis is provided for optimization of product design and fault positioning.

A method for producing a radiation-emitting component comprises providing a carrier with a housing structure, wherein the housing structure is formed from a polymer material and has a recess. The method further comprises arranging a radiation-emitting semiconductor chip on the carrier in the recess of the housing structure, and forming a reflective layer at least on the housing structure. Forming the reflective layer comprises electrophoretic deposition of reflective particles. A radiation-emitting component is also described.

The invention relates to a method for characterising electroluminescent devices, which comprises: • illuminating the electroluminescent devices, the illumination being configured to generate charge carriers; • acquiring a series of luminescence images emitted by recombining the charge carriers in the electroluminescent devices; • determining, from the series of images and for a given electroluminescent device, a luminescence curve (20) as a function of time; • determining, from the luminescence curve (20) as a function of time, at least one parameter representative of an electroluminescence delay T, this electroluminescence delay T corresponding substantially to the start of an emission of radiation by electroluminescence of the given electroluminescent device.

A method for producing a plurality of radiation-emitting components is specified, comprising the steps: - Providing a component assembly with a plurality of radiation-emitting semiconductor chips, each having a main emission surface, - Arranging a conversion layer containing a phosphor on a main emission surface, - Area-by-area application and / or introduction of particles onto the surfaces of the conversion layers. A radiation-emitting component is also specified.

A method for manufacturing a large number of radiation-emitting semiconductor chips is described, comprising the following steps: - Providing a semiconductor chip assembly (1) with an epitaxial semiconductor layer sequence (2) that has been epitaxially grown on a growth substrate (4), wherein the semiconductor chip assembly (1) has a plurality of chip regions (5) and wherein at least one structural trench (6) is arranged between two chip regions (5), - Inserting at least one additional trench (7) between two chip areas (5), - Introducing a slit (10) into the semiconductor chip assembly (1) which at least partially overlaps with the further trench (7) in top view, - Separating the semiconductor chip array (1) along the slit (10) into a plurality of radiation-emitting semiconductor chips, each radiation-emitting semiconductor chip comprising a chip area (5). Furthermore, a semiconductor chip assembly (1) is specified.

The invention relates to the technical field of electromagnetic compatibility, and discloses a whole vehicle and part radiation emission simulation precision evaluation index and method, and the index comprises a sawtooth peak frequency multiplication error index and a trend error index. Basic data are obtained, wherein the basic data comprise simulation calculation frequency ranges divided into different frequency bands and simulation and actual measurement data of the different frequency bands; according to the frequency band and the simulation and actual measurement data corresponding to the frequency band, corresponding numerical values of a sawtooth peak frequency multiplication error index and / or a trend error index are selectively calculated; establishing a radiation emission simulation precision quantitative evaluation function according to corresponding values of different frequency bands, sawtooth peak frequency multiplication error indexes and / or trend error indexes, and obtaining a radiation emission simulation precision quantitative evaluation result; and evaluating the precision of the simulation model according to a radiation emission simulation precision quantitative evaluation result, and carrying out error positioning. An error quantitative evaluation index is creatively proposed, a quantitative evaluation function and a segmented error analysis method are constructed, and multi-dimensional quantitative evaluation of simulation precision and error positioning are realized.

A UV LED reactor includes a housing having an inlet, an outlet and a reactor chamber; a UV LED module mounted to the housing configured to emit UV radiation into the reactor chamber having a selected wavelength range and with a selected energy (E); and a heatsink on the UV LED module configured to dissipate heat generated by the UV LED module. The heatsink on the UV LED module includes one or more surfaces in thermal communication or physical contact with the fluid, which improves the efficiency of heat transfer from the heatsink to the fluid and eliminates the need for cooling fans. The UV LED reactor can also include a UV transparent inner tube mounted to the inlet for generating a double UV exposure flow path through the reactor chamber. The UV LED reactor can also include a UV reflective coating on the sidewalls of the housing, or on a separate tube or sleeve mounted to the housing, configured to reflect UV radiation onto the fluid in the reactor chamber.

A radiation-emitting device includes an optoelectronic component for emitting first electromagnetic radiation. The radiation-emitting device also includes a conversion element having an entrance surface and an exit surface. The radiation-emitting device further includes a dielectric mirror on the exit surface. The radiation-emitting device is configured such that first radiation emitted by the component during operation enters the conversion element via the entrance surface. The conversion element is configured for converting the first radiation into second electromagnetic radiation, which subsequently exits the conversion element via the exit surface. The dielectric mirror is transmissive to second radiation that is incident at angles of incidence in a predefined first angle range, and is reflective for second radiation that is incident at angles of incidence in a predefined second angle range.

The invention discloses a continuous efficient heat storage and exchange converter and method based on convection-radiation conversion, and belongs to the technical field of industrial energy conservation. The converter is of a three-dimensional spiral body structure, and the spiral body is formed by stacking 300-500 layers of shaftless equal-diameter spiral wires; the key structure sizes of the spiral wire comprise a wire diameter d, a spiral diameter D and a screw pitch B; wherein the thread diameter d of the spiral thread is 0.5-1 mm, and the spiral thread diameter D and the thread pitch B are respectively 1-2 mm; the specific surface area of the spiral body is 1800-3000m < 2 > / m < 3 >, so that the high convection heat exchange area is ensured; the thickness of the spiral body is 300-500mm, so that the radiation emissivity is close to 1; the porosity of the spiral body is gradually changed from 0.5 to 0.9 from the center to the heat exchange surface, so that radiation shielding in the three-dimensional spiral body is reduced. The device has the advantages that the device is suitable for efficient recycling of flue gas waste heat of various industrial furnaces, and the waste heat recycling efficiency can be effectively improved to 75% or above; particularly, a heat accumulating type heating furnace capable of reversing periodically can be replaced, the problems of furnace temperature and pressure fluctuation, flue gas waste heat loss and the like caused by frequent reversing in the traditional heat accumulating type heating process are solved, and continuous and efficient production of an industrial furnace is achieved.

An electrical generator system including a radionuclide material; and a sandwich structure, the sandwich structure including: a layer of an n-type semiconductor material; a layer of intrinsic n-type semiconductor material; a layer of p-type semiconductor material; and metal electrodes, one of the electrodes being in direct contact with said n-type semiconductor material and another electrode being in contact with the p-type semiconductor material, forming metal-semiconductor junctions therebetween; wherein radiation emissions received from said radionuclide material are converted into electrical energy at said metal-semiconductor junctions; and electrical contacts connected to said electrodes which facilitate the flow of said electrical energy when connected to a load.

The disclosure concerns a 3D printhead, a radiation emission device, and processes for additive fabrication and extrusion. The printhead comprises a radiating plate configured to transmit a thermal energy to the printing material deposited on a surface. A radiation emission device may be attached to an additive fabrication or extrusion device and comprising a radiating plate and a heating element. Additive fabrication and extrusion processes using a radiation for heating a surface for deposition of the material. Characteristics of products thus produced, such as porosity rate, warping, isotropy, maximum stress, internal stress, impact resistance, bending resistance, deformation at break, rigidity modulus, crystallinity rate, and impermeability are improved.

A method for manufacturing a radiation-emitting component (100) is specified, comprising the following process steps: - Providing at least one semiconductor chip (10) which, during operation, emits electromagnetic radiation of a first wavelength range from a radiation emission surface (11), - Manufacturing a conversion element (20) on the radiation emission surface (11), wherein manufacturing the conversion element (20) comprises the process steps: - Applying a partially cured matrix material (21) in which phosphor particles are embedded that convert electromagnetic radiation of the first wavelength range into electromagnetic radiation of a second wavelength range, to a surface, - Compacting the partially hardened matrix material (21) to produce a compact layer (22), - Complete hardening of the compact layer (22), wherein the surface is the radiation emission surface (11) of the semiconductor chip (10) or an auxiliary substrate from which the compact layer (22) is transferred to the radiation emission surface (11) before complete curing. A radiation-emitting device (100) is further specified.

A method for fabricating a radiation-emitting device is described. The method comprises: providing at least one semiconductor chip configured to emit electromagnetic radiation of a first wavelength range at a radiation-emitting surface of the semiconductor chip during operation; fabricating a conversion element on the radiation-emitting surface of the semiconductor chip, comprising the steps of: applying a photoresist to the semiconductor chip; structuring the photoresist such that the radiation-emitting surface of the semiconductor chip is free of the photoresist; arranging a conversion material on the radiation-emitting surface of the semiconductor chip, the conversion material comprising a polysiloxane precursor; and crosslinking the conversion material to fabricate the conversion element.

The invention relates to a device for testing and / or adjusting and / or calibrating at least one imaging system, in particular a lidar system, wherein the imaging system is associated with at least one radiation-emitting unit, wherein a detection field can be formed by means of the emitted radiation, wherein the device has at least one radiation direction unit for directing the radiation onto an entry area of ​​a kaleidoscope, wherein the radiation direction unit has at least one controllable radiation-reflecting element, wherein the kaleidoscope has mutually facing reflective surfaces that deflect the radiation within the kaleidoscope depending on a certain entry angle of the radiation into the kaleidoscope.wherein the device comprises at least one reflection device adjoining an exit region of the radiation from the kaleidoscope for reflecting the radiation exiting the kaleidoscope, the reflection device comprising a controllable display. The invention further relates to a method for testing and / or adjusting and / or calibrating at least one imaging system, in particular a lidar system.

A method of processing radiation associated with an object (22), the method comprising: providing a primary radiation source (12, 12a), a secondary radiation source (14; 14b) and a primary detector (16; 16a) in the housing; emitting primary radiation (20, 20a) onto the object by means of the primary radiation source; by means of the primary detector, a plurality of primary activity periods (76; 76a), the primary radiation having interacted with the object; and radiating the secondary radiation (24; 24b) with a secondary pulse (80; 80b) onto the object, the secondary pulses being emitted in a plurality of primary inactivity periods (78; 78a), each primary inactive period being interleaved with the primary active period; wherein no secondary pulse is emitted during the primary activity period; and wherein during each primary inactivity period, the primary detector is inactive in terms of capturing incoming radiation during the primary inactivity period.

A method for calibrated X-ray imaging, with an X-ray imaging system with a radiation emitter with variable pose and an X-ray detector with a variable pose which can be actuated independently of the variable pose of the radiation emitter is described. A calibration and control device and an X-ray imaging system are also described.

The invention relates to the technical field of radiotherapy, and particularly discloses an automatic control device, method and system for ray emission, a beam needle and a radiotherapy needle are in non-physical connection, and when it is monitored that the phase position between the beam needle and the radiotherapy needle meets the ray emission condition, the beam needle and the radiotherapy needle are in non-physical connection. The radiation source is controlled to emit rays to the radiotherapy part, the rays are accurately emitted to the radiotherapy part through the beam needle, the air and the radiotherapy needle, the radiation source does not need to be connected with the radiotherapy part through the radiotherapy needle, the situation that displacement of the radiation source in the radiation direction changes is reduced, the emission accuracy of the rays is improved, and the radiation effect is improved. Therefore, the accuracy, convenience and efficiency of radiotherapy are improved, and the risk of radiotherapy is reduced. The radiotherapy needle is directly guided into the radiotherapy part in a sealed manner, so that the wound of the radiotherapy part can be reduced, and the reduction of the trauma suffered by the radiotherapy object is facilitated; and the damage conditions, such as bending, fracture and fracture, of pipelines of the beam needle and the radiotherapy needle are reduced.

The invention relates to a radiation-emitting semiconductor chip having the following features: —a semiconductor body including an active region which, during operation, generates electromagnetic radiation and is arranged in a resonator, —at least one recess in the semiconductor body, which recess completely penetrates the active region, wherein—the recess has a first lateral face and a second lateral face opposite the first lateral face, and—the first lateral face has a first coating which specifies a reflectivity for the electromagnetic radiation of the active region, and / or—the second lateral face has a second coating which specifies a reflectivity for the electromagnetic radiation of the active region. The invention further relates to a method for producing such a semiconductor chip.

The invention discloses a radiation EMI simulation prediction method for an inductive conductivity sensor. The method comprises the following steps: S1, establishing a sensor simulation model; s2, on the basis of the working principle of the inductive conductivity sensor, performing component connection on a probe coil of the sensor simulation model and a PCB (Printed Circuit Board) to obtain an induced voltage prediction model of an output port of the probe coil; importing a preset model file of the PCB into board-level electromagnetic simulation software, and obtaining near-field radiation data when the PCB works; s3, selecting a plurality of corresponding frequency points meeting a preset radiation threshold according to the near-field radiation data, and recording a radiation electric field value corresponding to each frequency point; s4, setting a point radiation source position through three-dimensional electromagnetic field simulation software so as to add an excitation source; s5, based on an induced voltage prediction model of an output port of the probe coil, obtaining predicted induced voltage according to the added excitation source; and S6, taking the predicted induced voltage as an alternating-current equivalent voltage source, and simulating and obtaining the interference of the induced voltage of the output port of the probe coil on an operational amplifier chip according to a pre-constructed operational amplifier working circuit. The problem that in the prior art, interference generated by radiation emission of components and parts on external devices cannot be analyzed, and the influence of the interference on some chips cannot be clearly analyzed is solved.