78 results about "Thermal ionization" patented technology

A system for measuring in-cylinder parameters utilizing an image charge measured in an engine cylinder by an in-cylinder pressure sensor due to chemi and or thermal ionization in Engine. The in-cylinder pressure sensor includes a sensing element, which is a metal sensor probe with a selective coating (e.g., metal, oxides of metal, native oxides, semiconductor, oxides of semiconductors, ceramics, glass, dielectric, etc., in the form of a coating on the metallic probe, tube, etc) in order to function in harsh, corrosive and/or elevated temperature environments. The output of the sensor can be connected to a signal-conditioning unit, which includes a low noise differential charge amplifier with an auto offset correction circuit to measure fast varying signals. The signal out from the conditioning unit can be acquired utilizing a high-speed microcontroller-based data acquisition system with suitable software to analyze and estimate parameters such as, for example, in cylinder pressure and knocking.

The invention discloses a uranium isotope abundance measurement method by using carbon nanotubes as an ion emission agent, which comprises the following steps: (1) sample preparation: preparing a carbon nanotube suspension, and pretreating a rhenium strip; (2) sample coating: putting the evaporation rhenium strip on a sample coating device, dripping a uranium solution onto the evaporation rhenium strip, drying, and cooling to room temperature; coating the carbon nanotube suspension on the uranium sample, drying the evaporation rhenium strip, cooling to room temperature, and loading onto a rotary table; and (3) sample measurement: sending the rotary table into an ion source, starting a mass spectrometer, and after the ion current signal intensity reaches the maximum and the signal stays in the most stable state for 3-5 minutes, starting data acquisition of uranium isotope abundance measurement. By using the carbon nanotubes as the ion emission agent for uranium isotope abundance measurement, the invention improves the ion emission property of trace uranium sample in thermal ionization mass spectrometer measurement; and by optimizing the burning strip used by the carbon nanotubes as the emission agent as well as experimental conditions for sample preparation, testing and the like, the invention establishes a novel method for measuring the abundance of trace uranium isotope.

The invention aims at providing a method for online-analyzing organic monomer chlorine or bromine isotope, which adopts a direct negative chemical ionization to replace an original complex organic monomer conversion process. The method is characterized by including the steps: A. gathering chlorine or bromine substitute; B. separating gas chromatography: placing the gathered chlorine or bromine substitute into the gas chromatography to be separated; C. conducting negative chemical ionization: components analyzed through chromatography directly flow into a negative chemical ion source through acapillary column, the negative chemical ion source replaces an original electron bombardment source configured on an isotope ratio mass spectrum to conduct the negative chemical ionization; D. mass spectrometric detecting: on a gas isotope ratio mass spectrum, selecting a faraday receiving cup corresponding to mass number of chlorine or bromine substitute directly, and receiving electronegative isotope fragment ions generated by the negative chemical ionization. The process is conducted under high vacuum state, and degree of vacuum is higher than 1.0*10<-3> Pa. The method greatly simplifies aprocess of online-analyzing organic monomer chlorine or bromine isotope and can form various special devices for detecting organic monomer isotope ratio.

The invention relates to a mass spectrum analysis instrument, in particular to a vacuum ultraviolet photoionization and chemical ionization compound ionization source based on radio frequency electric field enhancement of quadrupole rods. The vacuum ultraviolet photoionization and chemical ionization compound ionization source based on radio frequency electric field enhancement of the quadrupole rod comprises a vacuum ultraviolet light source and an ionization chamber cavity; a plurality of transmission electrodes, the quadrupole rods and vacuum differential hole electrodes are coaxially arranged in an ionization chamber in a spaced mode; a metal grid mesh is attached to the transmission electrode far away from an ultraviolet light inlet, ultraviolet light emitted by the vacuum ultraviolet light source is irradiated to the metal grid mesh and phoelectrons are generated; direct-current voltage and radio frequency voltage are applied to the quadrupole rods. On the basis of vacuum ultraviolet photoionization, the compound ionization source ionizes reagent gas through the phoelectrons generated through the photoelectric effect, and therefore chemical ionization happens to samples through reagent ions; through the radio frequency electric field of the quadrupole rods, ionization efficiency of chemical ionization caused by the phoelectrons can be improved; besides, chemical compounds with ionization higher than vacuum ultraviolet light photon energy can be ionized through chemical ionization, and the range of the chemical compounds capable of being ionized is widened.

A system and method for controlling knock in a lean burn internal combustion (IC) engine includes a spark plug having an electrode, an electrical circuit, and a controller. The electrical circuit is configured to provide a first voltage to the electrode and detect an ion current during a thermal-ionization phase of the combustion process, and provide a second voltage to the electrode to create a spark and initiate a combustion process within the combustion chamber. The controller is configured to monitor the ion current for a knock condition that includes at least an incipient knock condition, determine a crank angle of the IC engine where the incipient knock occurs, and adjust timing of the IC engine to operate at a crank angle that does not exceed a threshold level beyond inception of incipient knock.

The invention discloses a thermal ionization plasma generation test device. The thermal ionization plasma generation test device comprises a closed explosion chamber, an optical fiber probe, a spectrometer, a sensor, a pressure regulation valve and a data processing system, wherein the closed explosion chamber comprises a combustion chamber, an optical window and an ignition device, a receiving port of the optical fiber probe is aligned to the optical window, the spectrometer is connected with the optical fiber probe and is used for data collection, the sensor is arranged inside the combustion chamber and can be used for measuring temperature and pressure in the combustion chamber, the pressure regulation valve is arranged at one end of the combustion chamber, and the data processing system is connected with the sensor, the pressure regulation valve and the spectrometer separately and is used for processing data and regulating plasma density. The invention discloses thermal ionization plasma density test and control methods. The thermal ionization plasma generation test device has the characteristics of simple structure of a test system, wide measurement range and the like and is convenient to use; and moreover, with the adoption of non-contact measurement, no interference is generated to plasma, accurate test also can be achieved in a high-temperature and high-pressure environment, and the plasma density can be regulated during the test process.

Provided are an organic-inorganic-hybrid perovskite nanocrystal particle light-emitter having a two-dimensional structure, a method for producing the same, and a light emitting device using the same. The organic-inorganic-hybrid perovskite nanocrystal particle light-emitter having a two-dimensional structure comprises an organic-inorganic-hybrid perovskite nanocrystal structure having a two-dimensional structure which can be dispersed in an organic solvent. Accordingly, the nanocrystal particle light-emitter comprises an organic-inorganic-hybrid perovskite nanocrystal having a crystal structure combining FCC and BCC; forms a lamellar structure where organic planes and inorganic planes are accumulated in an alternating manner; and can exhibit high color purity by confining excitons in the inorganic planes. In addition, since the exciton diffusion distance decreases and exciton binding energy increases, it is possible to prevent exciton annihilation caused by thermal ionization and delocalization of charge carriers, such that the nanocrystal particle light-emitter can have high luminescence efficiency at room temperature.

The invention discloses a Nd and Sm separation method applied to Nd isotopc analysis of a thermal ionization mass spectrum. The method comprises the following steps of sample dissolving, in which a sample is dissolved to obtain a 3mol/L of HNO3 medium sample solution; and chemical separation, in which the sample solution is loaded onto an exchange column which is filled with 1.0ml of TODGA levextrel resin, 10ml 3mol/L of HNO3 is used to wash out basic elements including Fe, Mg, Al, K, Na, Cr, Ti and Ba, 10mL 11mol/L HNO3 is used to wash out Ca, 15ml 2.5mol/L HCl is used to wash out interference elements including La, Ce and Pr, 6mL 2mol/L of HCl is used to analyze Nd, and 5mL 0.5mol/L HCl is used to analyze Sm. According to the method, neodymium and samarium can be separated from a geologic sample by one column, Nd and Sm obtained by separation are high in purity and recovery rate, the method is rapid and efficient, and the flow background is low.

The invention relates to a method for coupling a large-area perovskite solar cell module with a thermoelectric power generation device module which is not smaller than the area of a cell. According to the method, the thermoelectric power generation device module and the large-area perovskite solar cell module are connected in series or in parallel and overlapped to form a composite module. The method has the advantages that: 1) the utilization efficiency of light energy and heat energy in solar energy can be improved, namely, the perovskite solar cell module mainly utilizes ultraviolet and visible light wave bands, the thermoelectric generation device mainly utilizes infrared light (heat energy) and waste heat generated by self photoelectric conversion and thermal ionization of the solar cell, so that the power output of the module is improved, and the maximum output power of the composite module is improved by 24 percent compared with that of a single solar cell module; 2) the thermoelectric module can timely take away the waste heat generated due to long-time illumination of the solar battery and working, so that the solar battery module keeps a constant temperature, the service life of the solar battery module is prolonged, and higher and more stable output power is obtained.

The invention relates to a method for eliminating cyanic acid radical disturbance in boron isotope thermal ionization mass spectrosoopy, which includes following steps: when using thermal ionization mass spectroscopic detection coat, the restraining agent and boron isotope are coated on the sample according to any proportion to carry on boron isotope detection; the method in the invention is to restrain the synthesis of CNO- and Cs2CNO+ion and eliminate the disturbance of CNO- and CS2CNO+ion to boron isotope detection.

The invention relates to a chemical ionization and photoionization composite source mass spectrometer-based volatile organic matter detection device and detection method. The device comprises a discharge ion source, photoionization lamps, a reaction tube with a gradually-decreasing inner diameter, a transition cavity, a mass spectrometer cavity, a transition cavity molecular pump, a mass spectrometer cavity molecular pump, a fore pump, an alternating current/direct current composite power source, a sample injection opening, an ion detection mass spectrometer, a gas source and the like. According to the detection method of the invention, chemical ionization and photoionization of ion and molecular reaction are adopted, so that the simultaneous dual ionization of various volatile organic matters can be realized; the mass spectrometer is adopted to realize online high-sensitivity detection; and since the multi-dimensional ionization and high-sensitivity mass spectrometry detection of thevolatile organic matters are realized by chemical ionization and photoionization, the defect of difficulty in detecting alkane volatile organic matters of chemical ionization such as proton transfer reactions and the defect of low efficiency under a vacuum condition of photoionization can be eliminated; and full-coverage, high-sensitivity, simultaneous and on-line detection of non-alkane volatileorganic matters and alkane volatile organic matters can be realized.

The present invention refers to a surface ionization detector comprises an emitter, a heating rod, a collecting electrode, a reducing liner and a housing. The emitter is made of molybdenum, platinum or alloy, and in the form of cylinder or a wire spiral. The heating rod heats and supports the metal emitter. When the heating rod is heated to 300-500° C., organic amine compounds collide with the surface of the emitter, generating positive ions through surface thermal ionization and thus are detected. The lowest detecting limit value of tertiary amine by the detector in the present invention can achieve to 10⁻¹⁴ g/s. The response to other hydrocarbons, ketones, etc., is 5-6 orders of magnitude lower than that of organic amines. The detector can selectively detect amines, hydrazines and their derivatives, and so on. The detector can be used as a detector for a gas chromatography system adopting capillary column or packed column, or alternatively be used alone as a sensor.

The invention belongs to the field of measurement of molybdenum isotope abundance, and more particularly relates to a method for measuring the negative thermal ionization mass spectrometry of molybdenum isotope abundance. The method comprises the three steps of rhenium strip sample coating, temperature raise measurement and data correction. According to the method disclosed by the invention, a negative thermal ionization mass spectrometry measuring method is adopted, a double-rhenium-strip assembly is used, and a SrCl2 solution is used as a cast charge. The method disclosed by the invention solves the technical problems of large sample coating amount, long measuring time and larger relative standard deviation of a measuring result in the prior art. According to the method disclosed by the invention, all index parameters are relatively balanced, thus the technical effects of smaller sample coating amount, short measuring time and smaller relative standard deviation of the measuring result are achieved; and the method is particularly suitable for measuring requirements of a radioactive sample and a biological sample with low cost.

The tail-gas strong-ionization and purifying gas production assisted zero-emission energy saving machine master device referring to a multiple comprehensive purifying and treatment device which is used for high-efficiency zero emission purification of biological degradation-resistant organic waste liquid high in pollution, toxicity and concentration and waste tail gas. The tail-gas strong-ionization and purifying gas production assisted zero-emission energy saving machine master device comprises a fuel steam system which heats organic waste liquid water alcohol high in pollution, toxicity and concentration by waste heat of waste tail gas, a plasma high-energy electron, high-energy discharge catalyzing and high-energy ionization synergic purifying system which catalyzes and purifies of the waste tail gas, a thermal ionization purifying system which can burn and purify in an ultrahigh burning and purifying pulse manner by the waste tail gas, a high-energy fuel and gas optical catalyzing and purifying system which can transform carbon dioxide purified by high-energy electronic high-photoelectricity into fuel, and an energy saving device combustion-supporting assistance complete-burning system which can produce mixed gas high-energy fuel by organic waste liquid high in pollution, toxicity and concentration and water alcohol steam via waste heat to increase power of an engine. The tail-gas strong-ionization and purifying gas production assisted zero-emission energy saving machine master device is applicable to an internal combustion engine.

The invention relates to a method for determining boron isotopic composition with static double-receiving method by a positive thermal ionization mass spectrometry, wherein the 309 and 308 ion peaks are statically received simultaneously by two Faraday cups by adjusting the two parameters of FocusQard and DispersionQuad in a focusing optical system, and the determination of high-accuracy boron isotopic composition is finished. The method comprises the following steps: (1) determining the FocusQard and DispersionQuad parameters in ion source optical focusing; (2) determining the two parallel cups and cup parameters of a Faraday receiver; (3) and determining the receiving mass number of the central cup of the Faraday receiver. The method establishes a method for determining boron isotopic composition using double-Faraday-cup static receiving method without changing high-pressure parameter and Faraday cup hardware setting; compared with dynamic peak skip-scanning method, the data acquisition time is greatly shortened, and the sensitivity and inner and outer accuracies of the determination of boron isotopic composition using positive thermal ionization method are improved.