186results about How to "Elimination temperature" patented technology

The invention relates to a multi-stage magnetic field straight pipe magnetic filtration and pulsed bias compounded electrical arc ion plating method, and belongs to the technical field of material surface treatments. In the prior art, plasma transmission efficiency is low and pulsed bias can not completely remove large particles due to applying of magnetic filtration on an arc source. A purpose of the present invention is to solve problems in the prior art. The method comprises: 1, connecting a workpiece to a pulsed bias power supply, connecting an electrical arc ion plating target source to a target power supply, and connecting a multi-stage magnetic field straight pipe magnetic filtration device in front of the target source; 2, carrying out thin film deposition, wherein work gas is introduced until achieving 0.01-10 Pa when a pressure in a vacuum chamber is less than 10<-2> Pa, the pulsed bias power supply is opened, a pulsed bias amplitude value, frequency and a duty ratio are adjusted, the target power supply is opened, plasma is generated, the multi-stage magnetic field straight pipe magnetic filtration device is opened, removal of large particles and efficient transmission of the plasma in the magnetic filtration device are achieved, process parameters are adjusted, and a thin film with no large particle defect is rapidly produced; and 3, adopting a single-stage magnetic field to combine direct current / pulsed bias to obtain a thin film with a certain thickness.

A proximity probe system comprising a multi-coil proximity probe including a drive coil, a sense coil and a reference coil. The system includes a signal generator driving the drive coil with an alternating current for creating a magnetic field that induces eddy currents in a proximate conductive object resulting in an eddy current induced magnetic field emanating therefrom. The sense coil is interposed between the object and the drive coil for outputting an object induced alternating current that is detected by the system and correlated to a position of the object relative to the probe. The reference coil is positioned to be inductively coupled to the drive coil for carrying a drive coil induced alternating current that is detected, conditioned and feedback to the signal generator for controlling the magnetic field radiating from the drive coil while sensing the the object induced alternating current in the sense coil.

A proximity probe system comprising a multi-coil proximity probe including a drive coil, a sense coil and a reference coil. The system includes a signal generator driving the drive coil with an alternating current for creating a magnetic field that induces eddy currents in a proximate conductive object resulting in an eddy current induced magnetic field emanating therefrom. The sense coil is interposed between the object and the drive coil for outputting an object induced alternating current that is detected by the system and correlated to a position of the object relative to the probe. The reference coil is positioned to be inductively coupled to the drive coil for carrying a drive coil induced alternating current that is detected, conditioned and feedback to the signal generator for controlling the magnetic field radiating from the drive coil while sensing the the object induced alternating current in the sense coil.

Method for stabilizing the frequency of a frequency synthesizer by means of a reference oscillator unit coupled to a voltage controlled oscillator (VCO) and a frequency synthesizer, wherein the synthesizer is provided with a phase locked loop (PLL) to stabilize the operation of the voltage controlled oscillator, wherein the reference oscillator unit is a MEMS (MicroElectromechanicalSystems) reference oscillator unit, the temperature of the MEMS reference oscillator unit is measured, and the output frequency is corrected according to the measured temperature by using a frequency / temperature function.

A manufactured component, method and apparatus for advanced manufacturing that includes a nozzle for extruding a working material, wherein the polymeric working material includes a carbon fiber reinforced polymer. The build of the component takes place on a work surface at atmospheric temperatures.

The invention provides a method for growing aluminium nitride monocrystal by using a physical vapor transport method. The method for growing the aluminium nitride monocrystal comprises the following steps of heating a raw material area and aluminium nitride seed crystal, wherein the raw material area is heated to a growth temperature, and before the raw material area is heated to the growth temperature and is at least heated to be over 1650 DEG C, the temperature of the seed crystal is kept to be higher than the temperature of the raw material area; and adjusting at least one of the temperature of the raw material area and the aluminium nitride seed crystal to form a temperature gradient between the raw material area and the aluminium nitride seed crystal, so as to carry out the growth of the aluminium nitride seed crystal.

The invention provides a clindamycin phosphate freeze-dried powder injection, which is prepared by the steps that: clindamycin phosphate solution is added with NaOH and is freeze-dried, wherein, the weight ratio of clindamycin phosphate to the NaOH is between 12 and 18 to 1, and the preferred weight ratio is 16.5 to 1. The clindamycin phosphate freeze-dried powder injection has simple formula and less auxiliary materials, overcomes side effects due to the fact that the auxiliary materials are excessively added, and ensures that patients are safer for use.

The invention provides a monitoring device and a monitoring method for a mining FBG roof separation layer. The device comprises a vertical measurement barrel and a packaging casing, wherein fixed pulleys, tape pulleys and constant-strength cantilever beams are symmetrically arranged in the packaging casing; a steel wire rope penetrates through the tape pulleys and the fixed pulleys and penetrates out from a steel wire rope guide hole in the top part of the vertical measurement barrel; one end of the steel wire rope is connected with an anchor head; a shallow part measurement point and a deep part measurement point are distributed inside a drill hole; the anchor head is pushed to the measurement points in the drill hole; when the stress of the steel wire rope changes, the stress change is displayed through wavelength values of an FBG A and an FBG B; a wavelength demodulation device is used for demodulating the wavelength values into digital signals, the digital signals are sent to a computer for real-time processing, and a separation layer numerical value is combined for drawing a separation layer quantity changing curve and a set separation layer boundary value; whether the separation layer exists is judged; and the data change of the roof separation layer is monitored in real time. Temperature compensation is performed with a differential form, on-line measurement of the roof separation layer is realized, the reliability and the accuracy are high, an early warning signal can be issued, and roof fall accidents can be avoided.

An apparatus for measuring gravity acceleration of a drilling tool comprises sensors and a measurement circuit. The sensor comprises a three-axis gravity accelerometer, a reference measurement sensor and a temperature sensor. The three-axis gravity accelerometer measures acceleration component signals in three mutually orthogonal directions, and the reference measurement sensor generates a signal that varies with rotation and is not affected by vibration or shock to serve as a reference signal. The temperature sensor measures the temperature in the apparatus to compensate the temperature effect of the gravity accelerometers. The measurement circuit acquires output signals of the sensors and performs cross-correlation processing on the accelerometer components using the reference signal to extract gravity acceleration signals so as to eliminate centrifugal acceleration, vibration, shock and other interferences generated by rotation. The non-interference gravity acceleration signals is used for calculating an inclination angle and a toolface angle of a drilling tool in the rotating state.

The invention discloses an optical carrier microwave gyroscopic method for detecting angular velocity, which is used for measuring the rotational angular velocity through the forward and backward bidirectional high-stability microwave generated in the optical fiber ring by a bidirectional photoelectric oscillator based on the phase-locked frequency doubling technology. The core of the method is the application of the frequency doubling technology, the microwave oscillation frequency in one direction is locked to the high-stability standard time reference source, the relative cavity length of the photoelectric oscillator in the other direction is stabilized, temperature drift and optical parasitic noise of the fiber ring-shaped cavity are eliminated, and the signal-to-noise ratio of the bidirectional oscillation difference frequency signal caused by the Sagnac effect is improved greatly. The optical carrier microwave gyroscopic method for detecting angular velocity, provided by the invention, has the characteristics of being high in measurement precision and easy to realize, and so on.

The invention relates to a method and a system for closing type Britten-Rankine combined cycle solar heat power generation. The method and the system keep the advantages of liquid pressurization and closing type Britten cycle of a supercritical carbon dioxide tower-type solar heat power generation system, eliminate the shortcomings of too high pressure and too low supercritical temperature of the system; by using water as the working medium of the Britten cycle in the tower-type solar heat power generation system and property of liquid water as incompressible fluid and extremely good heat transfer performance characteristics, the pressurizing power consumption of the working medium of the solar Britten cycle is greatly reduced; the Rankine cycle at the bottom part is used for absorbing heat released by the closing type Britten cycle, and thereby a new pattern of the closing type Britten-Rankine combined cycle solar heat power generation with higher efficiency and better economical performance is formed.

The invention discloses a digital out-of-pile nuclear measurement system based on a PC / 104 bus. The digital out-of-pile nuclear measurement system comprises a neutron detector, a front-end signal conditioning and amplifying unit and a signal digital processing unit, wherein the signal digital processing unit comprises a host processing unit, a data acquisition unit and a data output unit which are connected through the PC / 104 bus. Compared with the prior art, the digital out-of-pile nuclear measurement system based on the PC / 104 bus utilizes the PC / 104 bus as a safety software platform, facilitates adjusting of the control scheme and realization of various novel control strategies, reduces the number of components, and simplifies the hardware structure, thereby improving the reliability and meeting the requirement for nuclear safety digitization of ex-core nuclear instrumentation systems in large-scale nuclear power stations.

The invention provides an intelligent control method of a ventilation and air conditioning system of a rail transit station based on passenger flow. The method comprises the following steps: determining a research station, acquiring station basic data, station historical passenger flow and train data and historical meteorological data; according to the theoretical calculation method of the ventilation and air conditioning system load, the theoretical calculation value of the ventilation and air conditioning system load is obtained by using the known data. The load calculation model of ventilation and air-conditioning system based on dynamic passenger flow is constructed. The short-term forecast load of ventilation and air-conditioning system is calculated according to the model. The control strategy of ventilation and air-conditioning system is formulated, and the intelligent control method of station ventilation and air-conditioning system based on predictive control and time-varyingpassenger flow characteristics is proposed. The invention obtains passenger flow data in a short time in the future by using passenger flow prediction and passenger flow simulation technology, therebycalculating the system predicted load in a short time in the future according to the constructed model, so that the station ventilation and air conditioning control system can deal with the temperature fluctuation in the station in the short time in the future in advance.

The invention relates to a full-automatic shale gas content testing analyzer which comprises a desorbing device, a gas detection device, a data acquisition box and a host computer, wherein the desorbing device consists of a constant temperature water bath box and two desorbing tanks; the desorbing tanks are arranged in the constant temperature water bath box; shale samples can be rapidly put into the desorbing tanks; the gas detection device comprises a box body, a measuring cylinder, a gas collecting bottle and a pressure sensor; a liquid inside the bottle is pressed into the measuring cylinder by a shale gas collected into the gas collecting bottle; the data acquisition box comprises an acquisition box frame, a front panel, a rear panel and a hardware circuit; the hardware circuit is provided with a power supply module, a signal receiving module and a signal processing module; the data acquisition box is used for acquiring a signal detected by the detection device, and used for performing analog-to-digital to transmit to the host computer; the host computer is used for displaying, storing and analyzing the signal. The analyzer provided by the invention is scientific in design and convenient to rapidly disassemble, package and carry over. By adopting the analyzer, full-automatic measurement in the whole gas desorbing process can be achieved, and the measurement precision is high.

The invention discloses a biasing circuit for a power amplifier. within order to solve the problem that contradiction among the temperature compensation effect, the linearization effect and the signalintegrity in the bias circuit in the prior art, a current negative feedback circuit is composed of a ballast resistor, a first transistor, a second resistor, a third resistor, a current mirror and asecond transistor, compensation is carried out in a manner of reducing current flowing through a ballast resistor, and a self-adaptive temperature negative feedback effect is achieved; therefore, whenthe resistance value of the ballast resistor is increased to enhance the temperature compensation effect, the linearity of the radio frequency power tube is not influenced, the contradiction betweenthe temperature compensation and the linear compensation is eliminated, the contradiction between the linear compensation and the signal integrity is further avoided, and the power amplifier realizesthe double improvement of the thermal stability and the linearity. The invention also discloses a power amplifier which has the above beneficial effects.

A manufactured component, method and apparatus for advanced manufacturing that includes a nozzle for extruding a working material, wherein the polymeric working material includes a carbon fiber reinforced polymer. The build of the component takes place on a work surface at atmospheric temperatures.

The invention relates to the technical field of temperature detection, specifically to a temperature calibrating apparatus for an IGBT power module chip and a temperature correction method thereof. The temperature calibrating apparatus comprises an IGBT power module including an IGBT chip, a diode chip, an NTC and a heat radiation substrate, wherein temperature sensors are arranged on the lower ends of the IGBT chip and the diode chip, and the IGBT power module is respectively connected with a load, a driver and a data acquisition instrument. The driver and the data acquisition instrument are respectively connected with a host computer, and the driver is connected with a power supply. The acquired temperature is compared with the temperature measured by NTC, temperature correction curves MAP for the IGBT chip and the diode chip are formed based on NTC temperature. Operation junction temperature of the IGBT chip and the diode chip is monitored by checking a table by using real-time monitored NTC temperature and calibrated temperature MAP. Rapid, accurate and real-time operation junction temperature detection can be achieved without consuming calculating resources of a driving system.

The invention provides a comparator and a relaxation oscillator. The comparator comprises a comparator circuit including a current mode comparator circuit; and the current mode comparator circuit consists of a first current mode comparator circuit and a second current mode comparator circuit, wherein the first current mode comparator circuit and the second current mode comparator circuit are connected with a first input terminal and a second input terminal of the comparator circuit electrically. The first current mode comparator circuit includes two N type MOS tubes and grids of the two N type MOS tubes are connected electrically; and the second current mode comparator circuit includes two P type MOS tubes and grids of the two P type MOS tubes are connected electrically. The oscillator includes the comparator. According to the invention, the production cost can be lowered; the development period can be shortened; the frequency stability is improved; and the ultra-low power consumption is realized.

The invention discloses a novel double-channel differential measurement method of an atmospheric aerosol absorption coefficient based on coaxial photo-thermal interference. The method comprises the following steps of: forming interference in a to-be-measured aerosol sample region through modulated carrier laser; designing two channel interference light paths, wherein one channel is used to detect baseline phase drift caused by gradual change of environment temperatures and platform vibration, and the other channel is used to detect the total phase change caused by excitation laser absorption of aerosol and the baseline phase drift; performing differential to obtain phase variable caused by aerosol absorption; and detecting the aerosol absorption coefficient on line on the basis of interference amplification factor calibration. The method provided by the invention can be also used for detecting the concentration of specific aerosol ingredients according to fingerprint absorption characteristics. The method provided by the invention overcomes the effect of environmental temperature change and measuring platform vibration, cancels the adjustment of phase inversion difference point, doubles the acting distance of excitation laser and detection laser and has the characteristics of convenience for operation, high detection speed, easiness for miniaturization, high detection sensitivity, and the like.

The invention discloses a curing method for a superlarge-thickness fiber-reinforced epoxy resin matrix composite material and a composite material workpiece manufactured according to the method. Compared with a common constant-speed temperature-rising curing method, the stepped curing method for the superlarge-thickness thermosetting resin matrix composite material has the advantages that the degree of asynchronous curing of the interior of the superlarge-thickness composite material can be greatly lowered, and the temperature uniformity in the curing process of the large-thickness composite material is improved. The curing method is suitable for manufacturing large-thickness composite material parts in fields such as the aviation field, the aerospace field, the building field, the wind power field, the naval ship field, the automobile field and the electronic field.

The invention discloses a double fiber bragg grating sensor for rock bolt anchoring quality test. The sensor comprises a clip for clamping an annular housing at the tip of the rock bolt; on one end of the inner wall of the clip is provided with an elastic block I along the axial direction of rock bolt, and the other end is provided with an elastic block II; a sensing optical grating is placed in the elastic block I; and a matching optical grating in a free state is placed in the elastic block II, and the sensing optical grating and matching optical grating have the same Bragg grating parameters. Two optical gratings at a preset interval are in a same fiber, the optical fiber passes through the clip and is connected with the data processing device. After excitation of elastic wave by the tip of the rock bolt, the elastic wave propagating along the rock bolt or reflected elastic wave acts on the sensing optical grating to cause the migration of reflection spectrum central wavelength of the sensing optical grating, and the overlapping region with the reflection spectrum of the matching grating is subjected to light intensity demodulation and data processing, so as to obtain time domain or frequency domain characteristics of the elastic wave signals.

The invention discloses a mixing optics current transformer and a method for achieving self-correcting measurement thereof, belongs to the technical field of sensors, and particularly relates to an optics current transformer. The mixing optics current transformer and the method for achieving self-correcting measurement thereof solve the problems existing in an existing mixing optics current transformer of poor linearity and measurement accuracy temperature drifts. According to the mixing optics current transformer, an optics sensing unit is connected with a signal processing unit, a reference current source is connected with a far-end collecting unit and a self-correcting module, the far-end collecting unit is connected with the signal processing unit, and the signal processing unit is connected with the far-end collecting unit. The method for achieving the self-correcting measurement includes that, light sent by a light emitting diode (LED) light source is transmitted to the optics sensing unit; the optics sensing unit induces an electric current to be detected and transmits obtained linear polarized light back to a photoelectric detector; two paths of identical signals are transmitted to an industrial frequency filter and a high pass filter; digital signals are obtained by processing the identical signals; and a digital signal processor (DSP) uses a self-correcting algorithm to process the digital signals according to reference current signals. The mixing optics current transformer and the method for achieving self-correcting measurement thereof are suitable for an electric power system.

The invention discloses a self-correcting fully-distributed optical fiber Raman scattering sensor. In the invention, a duplex fiber cable is utilized as a sensing optical fiber, pump light is divided into a forward beam and a backward beam during the transmission process by welding the tail ends of the duplex fiber cable together so as to obtain two anti-Stokes Raman scattering light beams, and the intensity of the anti-Stokes Raman scattering light beams is measured so as to realize temperature measurement; and the intensity values of the two anti-Stokes Raman scattering light beams can be multiplied so as to achieve the purpose of self-correction of curvature, loss, strain and the like. The sensor disclosed by the invention comprises an optical fiber pulse laser, an optical fiber wavelength division multiplexer (WDM), the duplex fiber cable, a photoelectric receiving module, a digital signal processor (DSP) and a computer. The invention has the advantages that self-correction and temperature measurement can be carried out at the same time only by measuring the intensity of the anti-Stokes Raman scattering spectrums; and the system has a simple structure, and avoids the defects that the traditional measuring system has transmission loss and errors caused by different center wavelength and needs a plurality of photoelectric receivers.

The invention belongs to the technical field of automotive auxiliary brake devices and particularly relates to a mechanical connection type engine integration rocker arm brake device with a valve lift reset function. A roller is arranged at one end of a rocker arm through a pin and is in contact connection with an exhaust cam; a brake mechanism is arranged at the other end of the rocker arm and controls the motion of an exhaust valve bridge; a control mechanism is mounted at the position, between the brake mechanism and a rocker arm shaft, on the rocker arm; a brake oil way is arranged on the rocker arm shaft; the exhaust cam rotates to drive the rocker arm to swing around the rocker arm shaft, and drives the motions of the control mechanism and the brake mechanism under the cooperation of an electromagnetic valve to further control the motion of the exhaust valve bridge. The mechanical connection type engine integration rocker arm brake device has the valve lift reset function and a valve gap adjusting function, the layouts of the control mechanism and the brake mechanism are further improved, integration of valve lift reset is optimized, and the structure is more compact, so that adverse factors in the engine brake process are eliminated and weakened, and the brake process is more reliable.

The invention belongs to the technical field of micro-spectral imaging detection and relates to a method and device for testing a spectral pupil laser differential confocal CARS micro-spectrum. The core thought is as follows: Rayleigh light and CARS light loaded with tested sample spectral characteristics are excited by double lasers as a light source; and nondestructive separation is carried out on the Rayleigh light and the CARS light by using a dichroic optical system, wherein the Rayleigh light is subjected to geometrical detection and positioning, and the CARS light is subjected to spectrum detection. By using the characteristic that a zero crossing point of the spectral pupil laser differential confocal curve accurately corresponds to a focus position, the focus position of an excitation beam is accurately captured and positioned, and high-precision geometrical detection and high-spatial-resolution spectrum detection are achieved to form the method and device capable of achieving high-spatial-resolution spectrum detection of a sample micro-region. Through combining a CARS microscopical technique, the excited Raman scattering light loaded with sample information is shorter than a traditional spontaneous Raman effect in time, and the sample can be quickly subjected to nondestructive detection. The method and the device have the advantages of accurate positioning, high spatial resolution, nondestructive detection and high spectrum detection sensitivity, and a new way is provided for micro-region spectrum detection and geometrical measurement.

The invention relates to a temperature field and deformation field synchronous measurement device and method. The device comprises: an illumination module used for irradiating a to-be-measured objectthrough a light source; an image acquisition module which is used for acquiring a first image and a second image of the to-be-measured object under the irradiation of the lighting module through the light source; an image processing module which is connected to the illumination module and the image acquisition module and is used for correcting the crosstalk amount of each channel of the first image and the second image to determine a third image and a fourth image; an image processing module which is also used for determining a temperature field of the to-be-measured object according to the gray value of the first image channel of the fourth image and the reference temperature of the to-be-measured object; and an image processing module which is also used for determining the deformation field of the to-be-measured object according to the gray values of the second image channels of the third image and the fourth image. By means of the device, the accuracy of calculation results of the temperature field and the deformation field can be higher.

The invention provides an all-fiber weak magnetic field measuring device. According to the measuring device, an all-fiber FBG F-P cavity is formed in a magnetic sensitive module. When a surrounding magnetic field changes, cavity length of the all-fiber FBG F-P cavity is enabled to change by the scaling effect of magnetostrictive components and the spectral characteristics of interference signals reflected by the all-fiber FBG F-P cavity are enabled to change, and magnetic field intensity can be accurately calculated via spectral characteristic data analysis of the interference signals. With application of the mode, magnetic field intensity of a weak magnetic field can be accurately measured.

The invention relates to an improved kyropoulos method for sapphire crystal growth. The method comprises the following steps: raw material preparation, furnace body vacuumizing, furnace body heating, seed welding, monocrystal growth, crystal growth, separation and annealing, and crystal taking. In the whole crystal growth process, crystals are not taken out of a crucible and are still in a hot zone, so the cooling speed of the crystals can be accurately controlled to reduce the heat stress; a solid-liquid interface is bounded by a melt when the crystals grow, so the temperature disturbance and the mechanical disturbance of the melt surface can be reduced or eliminated by the melt before reaching the solid-liquid interface; if the crystals move or rotate in the crystal growth process, the crystal growth process is easily influenced by the mechanical vibration, so the improved kyropoulos method allows the pulling of a crystal seed rod in a rotary manner to be stopped after the monocrystal formation in order to effectively avoid the influence of the crystals by the mechanical vibration; and the utilization rate of the sane alumina raw material is high.

A system and method for controlling a multiple cylinder internal combustion engine include a mechanically operated exhaust gas recirculation valve having a spring-biased pintle with a surface area sized to generate a spring-opposing force to open a valve chamber entrance when an exhaust pressure differential exceeds a first threshold to allow exhaust gas to flow toward an intake and to close a valve chamber exit spaced from the chamber entrance to block exhaust gas flowing to the intake when the pressure differential exceeds a second threshold. The valve operates to limit or block external EGR flow at low load such as during starting and idle as well as at wide-open throttle while metering EGR flow for mid-to-high loads.