42 results about "Absorption cell" patented technology

The invention relates to the technical field of laser light source measurement, and discloses a wide-range narrow-linewidth laser wavelength and linewidth measurement system, which can be flexibly matched with the center frequency of laser to be measured through the arrangement of a tunable laser, breaks through the strict limitation of the existing beat frequency method on the center frequency, effectively expands the measurement range, and improves the measurement accuracy. By combining the synergistic effect of the absorption cell and the locking loop, the system stability is improved, the measurement precision of narrow linewidth laser is guaranteed, the integration time can be flexibly adapted without tedious adjustment of a delay optical path or change of parameters of acquisition equipment through the cooperation of the optical modulator and the delay optical fiber, the problem of inconsistent measurement resolution under different integration time is avoided, and the measurement accuracy is improved. And the accuracy of short-time measurement is obviously improved. The system integrates wavelength and line width measurement functions, can measure line width, center wavelength and long-time frequency stability of to-be-measured laser, is reasonable in structural design, retains the advantage of high precision of a beat frequency method, overcomes the defects that an existing method is narrow in measurement range and inconvenient to adjust integral time, and improves the measurement accuracy of the to-be-measured laser. And the measurement requirements of wide-range and narrow-linewidth laser are met.

The invention belongs to the technical field of optical absorption cell parameter design, and particularly relates to an optical absorption cell design method and system based on PSO particle swarm optimization, and the method comprises the steps: S1, building a PSO model, defining each particle as an optical path, setting the number of particles and the maximum number of iterations, discretizing an absorption cell optical mirror surface into a movable grid, and defining the moving direction of the particles; s2, initializing the position and speed of a particle swarm based on the curvature radius, spacing and incident angle parameters of a reflector of the absorption cell; s3, performing optical simulation on each particle, and calculating a fitness value reflecting the optical length, the absorption cell volume and the light spot coverage based on a simulation result; updating an individual historical optimal path and a global historical optimal path; s3 is repeated after the speed and the position are updated and the state of each particle is adjusted; and S4, outputting the optical length, the volume and the lens number of the absorption cell corresponding to the final global optimal path. According to the method, efficient search can be carried out in the parameter space, and a globally optimal or approximately optimal solution is found.

The invention relates to the technical field of oil type gas monitoring, in particular to an oil type gas laser monitoring and early warning device and method, and the device comprises a processor control panel, a laser driver, a laser device group, a light path change-over switch, a diffusion type light absorption cell and a tuning fork detector; emergent laser with different gas spectrum absorption wavelengths is generated; switching each path of laser beam to a diffusion type absorption cell; respectively demodulating based on the acquired acquisition signals to obtain second harmonic signal voltages of optical signals of methane, ethane and hydrogen sulfide gas; inputting the second harmonic signal voltage of the optical signal absorbed by the to-be-detected gas into the residual neural network, identifying the methane and ethane gas overlapping spectrum, and outputting the methane and ethane gas concentration in the to-be-detected gas; and generating a multi-parameter early warning signal according to the methane and ethane gas concentrations and the hydrogen sulfide concentration. The light absorption detection can be accurately carried out on methane, ethane and hydrogen sulfide in the oil type gas, and the methane and ethane gas overlapping spectrum can be effectively identified.

1. Name of the product in this design: Gas Absorption Cell (Long Optical Path Multiple Reflections). 2. Purpose of this design: for gas detection and gas measurement. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The application relates to the technical field of gas spectrum detection, and discloses a CO2 gas concentration dual-wavelength detection system and method based on TDLAS-WMS, which comprises a main control upper computer, a signal generation and modulation module, a dual-channel laser module, an optical path module, a gas absorption cell, a photoelectric detection module and a signal acquisition and lock-in amplification module. The method comprises the following steps: initializing and loading parameters; generating a driving signal of superimposed scanning and modulation to drive a laser; extracting a second harmonic signal after the laser passes through the gas to be detected; realizing high signal-to-noise ratio concentration signal acquisition, automatically judging whether the current waveband is saturated or under-response, switching to another waveband, and realizing self-adaptive dynamic detection. Through dual-wavelength cooperation and self-adaptive switching, the technical problems of narrow dynamic range, easy saturation at high concentration, insufficient sensitivity at low concentration, and large error of a single-wavelength TDLAS system are solved, and wide-range, high-precision and continuous self-adaptive detection from low concentration to high concentration are realized.

This invention discloses an in-situ calibration system for an underwater dissolved gas sensor with an integrated self-calibration module. A 2004nm butterfly laser module emits laser light, and a Herriott absorption cell module allows the laser to be reflected multiple times by the detector gas, resulting in selective absorption of the laser at a characteristic wavelength to form an absorption spectrum. A synchronization control module handles power supply, communication, environmental parameter control, and calibration timing control, enabling synchronized switching between the system's measurement and calibration modes. A data processing module inverts the spectral data collected by the system to obtain dissolved gas concentration data. A self-calibration gas supply unit introduces standard gas into the Herriott absorption cell module when the calibration program starts. This invention integrates the self-calibration function with the sensor detection unit, effectively simplifying the operation and maintenance process of underwater gas monitoring, improving the long-term stability of the sensor, and making it suitable for in-situ dissolved gas monitoring in various underwater environments such as oceans, lakes, and reservoirs.

The invention relates to the technical field of spectrum detection, in particular to a multi-optical-path gas absorption cell which comprises a gas chamber, a first cavity mirror and a second cavity mirror, the first cavity mirror and the second cavity mirror are arranged at the two ends of the gas chamber, and each of the first cavity mirror and the second cavity mirror at least comprises a circular integration region, an inner annular reflection region and an outer annular reflection region, and the circular integration region is sleeved with the inner annular reflection region and the outer annular reflection region; the optical axis of the circular integration area of the first cavity mirror coincides with the optical axis of the circular integration area of the second cavity mirror. An included angle exists between the optical axes of the inner annular reflecting region of the first cavity mirror and the inner annular reflecting region of the second cavity mirror; the optical axis of the outer annular reflecting area of the first cavity mirror coincides with the optical axis of the outer annular reflecting area of the second cavity mirror. According to the invention, a heterotype mirror capable of realizing multi-optical-path detection is designed by combining a multi-pass cell and an off-axis integral cavity technology to replace a traditional cavity mirror, so that the problem that different optical paths cannot be compatible in a single gas chamber structure is solved, and multi-component trace gas absorption detection with a self-defined range can be realized through a single gas chamber.

This invention relates to a wide dynamic range laser spectroscopy gas concentration detection device and method. The device includes: a long-path absorption cell comprising two opposing first and second concave mirrors, wherein during operation, a first laser beam undergoes multiple reflections between the two concave mirrors to form a first absorption optical path; an optical resonant cavity sharing a gas cavity with the long-path absorption cell, comprising a second entrance window and a second exit window disposed at the geometric center region of the first and second concave mirrors, wherein the geometric center region is the non-spot region of the first laser beam; and a pair of high-reflectivity mirrors respectively disposed on the second entrance window and the second exit window, wherein during operation, the second laser beam undergoes multiple reflections between the two high-reflectivity mirrors to form a second absorption optical path; the second absorption optical path is not less than 100 times the first absorption optical path. This invention combines the advantages of both the long-path absorption cell and the optical resonant cavity, achieving full-range gas concentration measurement from ultra-low concentrations (ppb) to percentage concentrations through a single gas chamber.

Present invention relates to a needle-free glucose measurement system which enable measurement of blood glucose level using concentration value of N2O molecule available in breath air, which comprises an electronic assembly (1.1) which stabilizes the temperature and flow of wavelength-adjustable laser light source (1.2) and controls wavelength, a laser-based sensor (1) which determines concentration values of N2O molecule by measuring the adsorption amount of detector (1.5) wherein beams coming from laser light source (1.2) are adsorbed by N2O molecules in the breath air in the adsorption cell (1.4), and a processor (2) which determine glucose values in the blood using the concentration data coming from laser-based sensor (1).

The invention relates to an etching end point detection method and system based on filtering scanning, and the method comprises the steps: irradiating infrared light emitted by a light source to an absorption cell, so as to output detection light after absorbing target gas; controlling the filter to perform wavelength scanning on the detection light, and identifying at least one characteristic wavelength point with an absorption peak; setting the fixed working frequency of the filter to allow the filter to pass through the detection light of the characteristic wavelength point; scanning the detection light of the characteristic wavelength point to obtain a first light intensity vector containing interference; calibrating a sidelobe response function matrix S of the filter; calculating the first light intensity vector according to the sidelobe response function matrix S to obtain a second light intensity vector for eliminating interference; and calculating the characteristic concentration c of the target gas according to the second light intensity vector, and judging an etching end point. According to the invention, the accuracy degree of etching end point judgment can be improved.

This invention relates to the field of spectral detection technology, specifically providing a multi-path gas absorption cell, comprising: a gas chamber, and a first cavity mirror and a second cavity mirror disposed at both ends of the gas chamber. Each of the first and second cavity mirrors includes at least: a circular integrating region, and an inner annular reflection region and an outer annular reflection region surrounding the circular integrating region; wherein the optical axes of the circular integrating regions of the first and second cavity mirrors coincide; the optical axes of the inner annular reflection regions of the first and second cavity mirrors are at an angle; and the optical axes of the outer annular reflection regions of the first and second cavity mirrors coincide. This invention, by combining multi-path cell and off-axis integrating cavity technology, designs a non-standard mirror that can realize multi-path detection, replacing traditional cavity mirrors and overcoming the problem of incompatibility between different optical paths in a single gas chamber structure. It enables the detection of trace gases with multiple components and custom ranges through a single gas chamber.

The utility model relates to the technical field of greenhouse gas detection, in particular to a low-cavity-mode gas absorption cell for closed-cavity flux greenhouse gas monitoring, which comprises a laser used for emitting laser beams, and further comprises a base, a gas absorption tube, a gas absorption tube and a gas absorption tube, and the strip-shaped reflecting mirror a and the strip-shaped reflecting mirror b are respectively arranged at the two ends of the base. According to the utility model, the ultra-thin strip-shaped reflecting mirror is adopted, so that the low-cavity-die and long-optical-path gas absorption cell is realized, the measurement optical path exceeds 5m, the cavity die volume is less than 15mL and the gas replacement time is less than 1s under the condition of small volume, and the absorption cell adopts an up-and-down structure, has few parts, is low in cost and is convenient to debug and maintain; by means of rapid gas replacement and optimized light path design, laser beams can interact with newly entering gas more rapidly, the detector can detect gas concentration changes more timely, flux monitoring precision is improved, and greenhouse gas flux data can be obtained more accurately.

The utility model relates to the technical field of carbon nitrogen emission monitoring, in particular to a dynamic monitoring device for non-point source carbon nitrogen emission, which comprises a supporting rod, a rotating table is rotatably connected to the top end of the supporting rod, a gas absorption tank is fixedly arranged in the middle of the rotating table, and a photoelectric detector is inserted into one end of the gas absorption tank. A tunable semiconductor laser is inserted into the other end of the gas absorption cell; compared with traditional dynamic monitoring equipment for non-point source carbon and nitrogen emission, according to the dynamic monitoring equipment for non-point source carbon and nitrogen emission, the filtering assembly is arranged at the end of the air pump according to requirements and comprises the mounting cylinder and the end cover, and air can be pumped into the mounting cylinder by starting the air pump; air is sequentially filtered through the grating net, the inner bag, the outer bag and the filter net and then conveyed into the first pipeline, the inner bag collides and rubs on the surfaces of the protruding blocks, and therefore dust accumulation on the surface of the inner bag is reduced, the stability of air circulation and filtering is improved, dust particles entering the first pipeline are reduced, pollution is reduced, and the precision of laser detection is improved.

This invention relates to the field of noise light processing technology, specifically providing a noise light isolator based on a Heriot-Limiter multi-pass cell for filtering noise light contained in light from a light source. The isolator includes a Heriot-Limiter multi-pass cell, an absorption cell, and a filter medium. The Heriot-Limiter multi-pass cell includes a first concave mirror and a second concave mirror, with an entrance aperture and an exit aperture respectively located at their edges. The absorption cell is located between the first and second concave mirrors and contains the filter medium. Light from the light source enters the Heriot-Limiter multi-pass cell through the entrance aperture and is repeatedly reflected between the first and second concave mirrors before exiting the cell through the exit aperture. During each reflection, the light from the light source passes through the filter medium in the absorption cell, thus filtering out noise light from the light source. This invention significantly increases the optical path length of the light source in the absorption cell, achieving saturable absorption of small-signal noise light and effectively improving noise light isolation.

The invention relates to the technical field of neutral atom quantum computing, in particular to a device and method for locking dual-wavelength laser frequency through a single absorption cell. The device comprises an atomic absorption cell, a first reflector and a second reflector, the atomic absorption cell receives a first laser and a second laser, and the first laser and the second laser are respectively emitted into the atomic absorption cell at a first preset angle and a second preset angle relative to a short axis of the atomic absorption cell; the first reflecting mirror and the second reflecting mirror are respectively arranged on two sides of the atomic absorption cell, so that the first laser and the second laser can be reflected back and forth for multiple times between the two reflecting mirrors so as to penetrate through the atomic absorption cell for multiple times; a third reflecting mirror is arranged on a first emergent path of the first laser from the atomic absorption cell, and the first laser is vertically incident to the third reflecting mirror; a fourth reflecting mirror is arranged on a first emergent path of the second laser from the atomic absorption cell, and the second laser is vertically incident to the third reflecting mirror; wherein the light paths of the first laser and the second laser do not coincide.

The utility model relates to the technical field of film dosimeter detection, in particular to a measuring rack for a film dosimeter, which comprises an absorption cell frame and a cuvette, a first light inlet and a first light outlet are symmetrically arranged on two sides of the absorption cell frame, and a cuvette accommodating cavity is arranged in the absorption cell frame. The cuvette containing cavity comprises a cavity body and a limiting cavity formed in the side end of the cavity body, a limiting elastic piece is arranged in the limiting cavity, the cuvette comprises a first rotating plate and a second rotating plate, the second rotating plate is rotationally arranged at the upper end of the first rotating plate through a torsional spring, a second light inlet is formed in the lower end of the first rotating plate in a penetrating mode, and a second light outlet is formed in the lower end of the second rotating plate. A second light outlet is formed in the lower end of the second rotating plate in a penetrating mode, and the section of the second light inlet is trapezoidal. According to the utility model, the position of the film dosimeter is absolutely stable in the measurement process, so that the obtained data is more accurate and consistent, the experiment efficiency can be improved, and the resource waste caused by duplicate sampling and measurement is reduced.

The utility model relates to the technical field of waste gas monitoring equipment, in particular to a long-optical-path gas absorption cell easy to install and maintain, which comprises an absorption cell body, two ends of the absorption cell body are respectively provided with a lens mechanism and a reflector mechanism through positioning pins, and the side surface of the absorption cell body is also provided with two universal barb type gas path interfaces; the lens mechanism comprises a lens end cover, the one-third position of one side of the lens end cover is an inclined face, and an inclined installation opening is formed in the inclined face. An incident light path of the absorption cell body is consistent, a light source, a spectrograph and the absorption cell can be connected through a one-to-two optical fiber patch cord, a lens mechanism and a reflector mechanism are installed in a positioning pin installation mode, optical devices are fewer, the size is smaller, structural optimization of the whole machine is facilitated, rapid disassembly, assembly and maintenance are achieved, and the installation efficiency is improved. Meanwhile, the manufacturing cost and the debugging difficulty are lower, the number of times of turning back of the reflector is increased to 7, the optical path reaches 14 * 300mm, and the sensitivity and the accuracy of ultralow-range gas detection are remarkably improved.

This invention relates to the field of gas detection technology, specifically to a magnetic rotation spectroscopy multi-pass absorption cell and gas sensing device based on a steady-state static magnetic field. The absorption cell includes a dual-wavelength multi-pass cell and permanent magnet rings disposed on the dual-wavelength multi-pass cell. The permanent magnet rings are sleeved on the dual-wavelength multi-pass cell and coaxially arranged with it. Ten to twenty permanent magnet rings are arranged sequentially from the inlet to the outlet of the dual-wavelength multi-pass cell. Each permanent magnet ring is of the same size and shape, and the distance between any two adjacent permanent magnet rings is 0 to 10 mm. The length of the permanent magnet ring arrangement matches the length of the dual-wavelength multi-pass cell, and they are symmetrically arranged from the center of the dual-wavelength multi-pass cell towards the inlet and outlet. This invention uses permanent magnets to replace the electromagnetic induction steady-state magnetic field, effectively avoiding the limitations of high energy consumption and excessive heat generation associated with AC solenoid coil induction of electromagnetic fields. It can promote the development of magnetic rotation spectroscopy into a high-sensitivity spectroscopic detection device that meets the requirements of external field applications.

The invention discloses an alcohol concentration detection device and method based on single-wavelength double light paths. The device comprises a light source module, a light beam shaping module, an absorption cell module, a double photoelectric detection module, an amplification and analog-to-digital conversion module and a processing module. In the technical scheme of the invention, the light source module emits a laser beam with single wavelength and stable power; the light beam shaping module collimates and splits the light beam into two light beams with different intensities, one light beam serves as a detection light beam and penetrates through the absorption cell module filled with a sample to be detected, and the other light beam serves as a reference light beam and is independently transmitted to a reference detection channel; a detection diode and a reference diode in the double photoelectric detection module respectively receive the detection light and the reference light and convert the detection light and the reference light into corresponding electric signals; the amplification and analog-to-digital conversion module carries out amplification and analog-to-digital conversion on the electric signal and outputs a digital signal to be read by the processing module; and the processing module performs ratio operation and data correction on the detection signal and the reference signal based on a preset algorithm, and finally calculates and outputs an alcohol concentration value. The online nondestructive detection of the alcohol concentration is realized, and the detection structure and principle are optimized. The method has the advantages of high precision, high real-time performance, portability, wide application range and the like.

The invention is suitable for the technical field of laser measurement, and provides a compact laser frequency automatic long-term locking system and method, which can obtain an absorption spectrum through triangular wave scanning by adjusting the laser wavelength to be close to a target spectral line. Parameters such as spectral line number, amplitude and distance threshold are set, a target spectral line is automatically identified, and a corresponding voltage value is recorded. And then, through fast and slow PID control, the frequency is locked at a spectral line zero crossing point through PZT and temperature adjustment. And the system monitors the frequency discrimination signal in real time, the PID is closed if the lock is lost, the output value is kept to avoid frequency hopping, then the target spectral line is re-identified through small-range oblique wave scanning and locking is recovered, and long-term stable automatic frequency locking is realized. Therefore, the device can realize many application scenes of laser frequency locking based on the atom / molecule absorption cell, is very suitable for research of high-precision and advanced physical experiments and interference measurement technologies in which a frequency-stabilized light source participates, can fully ensure high accuracy of the laser light source, and can simplify an experiment or measurement device.

The application discloses a gas detection device, comprising a blackbody radiation source, a focusing mirror, an optical fiber, an absorption cell, a mechanical chopper, a photodetector, a detector matching circuit, an FPGA board and an upper computer connected in sequence, full-spectrum radiation light emitted by the blackbody radiation source is coupled into the optical fiber through the focusing mirror, the radiation light is transmitted through the optical fiber and then enters the absorption cell, the radiation light is emitted from the absorption cell after multiple reflection and absorption in the absorption cell, the mechanical chopper is mechanically modulated, the radiation light reaches the photodetector, the detector matching circuit carries out noise filtering and signal amplification on the electric signal on the surface of the photodetector, then the FPGA board collects and completes signal processing, and finally the gas concentration is inverted on the upper computer. Through the multi-component gas filtering inversion method, the device can distinguish multiple gas components, and has the advantages of higher inversion concentration accuracy, stronger stability, faster efficiency and the like.

The invention discloses a multi-layer gas chamber optical absorption cell capable of keeping gas parameters stable for a long time and an operation method. The absorption cell comprises a gas chamber group, a valve assembly and a monitoring assembly. The gas chamber group comprises an inner-layer gas chamber and at least one outer-layer gas chamber surrounding the outer side of the inner-layer gas chamber layer by layer, the valve assembly is provided with an inner-layer gas chamber valve communicated with the inner-layer gas chamber and an outer-layer gas chamber valve communicated with the outer-layer gas chamber, the monitoring assembly can monitor target gas parameters, and the absorption cell is further provided with a reflector group and a light-passing window. The method is applied to the absorption cell, the gas parameters are monitored in real time through the monitoring assembly after vacuumizing and gas filling are conducted till the gas parameters of the gas chambers are consistent, differential gas pumping and filling regulation and control are conducted, and pumped gas can be recycled after being treated. According to the invention, stable gas parameters of the inner-layer gas chamber can be maintained for a long time, the continuous working time of the absorption cell is prolonged, the consumption of target gas is reduced, economy and environmental protection are realized, the structure and the method are simple, and the application value is relatively high.

The invention relates to the technical field of phase change absorption pools, and discloses a phase change absorption pool which comprises a box body with the overall contour being a cuboid, a stray light absorption area, a phase change heat storage area and a water cooling area are arranged in the box body, the stray light absorption area is arranged at one end of the box body, the water cooling area is arranged at the end, away from the stray light absorption area, in the box body, and the phase change heat storage area is arranged in the box body. The phase change heat storage area is located between the stray light absorption area and the water cooling area, a round hole is formed in the end of the box body, the stray light absorption area is of a conical structure, the opening end of the conical structure is communicated with the round hole, and a connecting column is fixedly installed at the position, away from the opening end, of the conical structure of the stray light absorption area. A plurality of rib plates are fixedly installed on the conical structure and the connecting column and fixedly connected with the inner wall of the box body. The invention aims to solve the problem that the actual contact area between a cone or fin structure arranged in an existing absorption cell main body and a working medium in the absorption cell is limited, so that the heat transfer rate of the absorption cell main body is influenced.

This invention relates to the field of optical gas detection technology, and particularly to a small absorption cell suitable for methane gas detection equipment, comprising a cylinder, an end cap, a first reflector, a second reflector, an adjustment unit, a laser, a photodetector, and a gas distribution unit. This invention solves the following problems existing in gas absorption cells: the position and angle of the reflector assembly are fixed, making it impossible to dynamically adjust the number of optical reflections and the effective optical path, thus limiting the applicable range; the gas to be tested is difficult to uniformly fill the entire absorption cell body after entering, easily leading to uneven concentration and affecting detection accuracy; this invention controls the deflection of the second reflector to increase or decrease the number of laser reflections, extending or shortening the laser reflection optical path, effectively improving the applicable range; this invention ensures uniform distribution of the gas to be tested within the cylinder by synchronously injecting it into the cylinder at multiple circumferential angles, ensuring detection accuracy.

The invention provides a gas concentration measurement method and system in a variable pressure scene, and belongs to the technical field of laser gas sensing, and the method comprises the following steps: converting environment pressure into an analog electric signal through a pressure sensor in a system architecture, converting the analog electric signal into a digital quantity through an ADC, and transmitting the digital quantity to a microprocessor; a gain binding model is pre-stored in the microprocessor, and the real-time pressure is substituted into the gain binding model to calculate the target gain. And high-precision decoupling of the oxygen concentration and the environment pressure is realized by fitting a single-concentration layer characteristic model and constructing a three-dimensional response curved surface model. In real-time measurement, the system collects a real-time original absorption intensity value and a real-time measured pressure value, and the decoupled real oxygen concentration is obtained through inverse function solution of the three-dimensional response curved surface model. Automatic calibration can be carried out to adapt to different absorption cells, and real-time performance, high precision and engineering compatibility are considered.

This invention belongs to the field of optical sensing technology and relates to an in-situ calibration device for a temperature sensor based on laser frequency sweeping technology. The main structure includes a laser, an optical attenuator, an optical beam splitter, a first circulator, a second circulator, a gas molecule absorption cell, a sensing probe, a calibration probe, a photodetector, a data acquisition box, an industrial computer, a voltage output module, an analog-to-digital converter, a current controller, and a temperature controller. It uses a laser frequency sweeping system as the sensor demodulation system and a π-PSFBG as the temperature sensing probe. A gas molecule line, unaffected by ambient temperature, is introduced as a frequency standard to compensate for frequency drift caused by environmental noise in real time. A gallium dot bottle is introduced as an absolute temperature reference to provide an absolutely stable temperature environment for the calibration probe, thus calibrating the system frequency drift caused by the π-PSFBG. In-situ calibration technology achieves long-term stability of the temperature sensor. Its structure is simple and can achieve high-resolution and long-term stable measurement.

The utility model discloses a segmented rapid scanning system using an external cavity quantum cascade laser, which belongs to the technical field of infrared spectrum rapid scanning and comprises a laser emission system, a control system, an ultrasonic injection system, a reference system, a calibration system and an information collection system. The control system is respectively connected with the laser emission system, the ultrasonic injection system and the information collection system, infrared light emitted by the laser emission system is divided into three paths through the beam splitter, the three paths of infrared light enter the ultrasonic injection system, the reference system and the calibration system respectively, and the ultrasonic injection system, the reference system and the calibration system are further connected with the information collection system. By adopting the structure, the system can work at room temperature by using the external cavity quantum cascade laser, the resolution ratio of a measured spectral line is improved, the astigmatism type multi-pass absorption cell is used, the mirror surface space can be utilized to the maximum extent, the absorption intensity of the spectral line is improved, scanning can be rapidly completed, and collection is convenient.

An adsorption cell array including a plurality of absorption cells. Each adsorption cell comprises an HTF-tube and a refrigerant tube which is co-axially positioned within the HTF-tube. An annular HTF-channel extends between the HTF-tube and the refrigerant tube. Adsorption material is contained in the refrigerant tube. The adsorption cell array further includes an inlet end HTF-tube mounting sheet, a distribution sheet having heat transfer fluid inlet openings, a first 3D-profiled cover sheet bounding at least one HTF-inlet channel, an outlet end HTF-tube mounting sheet, a refrigerant tube mounting sheet, and a second 3D-profiled cover sheet connected with the refrigerant tube mounting sheet. A heat transfer fluid outlet space is present between the HTF-tube mounting sheet and the refrigerant tube mounting sheet. A refrigerant space is present between the refrigerant tube mounting sheet and the second 3D-profiled cover sheet.

The application belongs to the technical field of density sensors, and relates to a fiber grating float type density sensing device based on laser sweeping technology. A pi-phase shift fiber grator is used as a sensitive element to improve sensitivity based on the advantage of narrow linewidth. A laser sweeping technology is used to establish a modulation-demodulation system to improve resolution and response time and realize real-time measurement and high-speed measurement. A gas molecule absorption cell is used as a standard wavelength reference to improve measurement accuracy based on the fact that a gas molecule absorption line is not affected by changes in external temperature and other factors. A cross-correlation algorithm is used to calculate the shift of the center wavelength of the pi-phase shift fiber grator relative to the absorption peak of the gas molecule absorption cell to improve measurement accuracy. When the density of the liquid to be measured changes, the buoyancy of the microcrystalline glass float changes, the pi-phase shift fiber grator senses the buoyancy, generates strain, and the center wavelength shifts. The time interval between the center wavelength and the absorption peak of the gas molecule absorption cell is calculated to demodulate the density of the liquid to be measured.

The application discloses a capillary type ionic liquid electrospray array structure and an electrospray device, wherein the capillary type ionic liquid electrospray array structure comprises an electrode sheet and a capillary array structure, a plurality of absorption cells are arranged on the emitting surface of the electrode sheet, each absorption cell is provided with the capillary array structure, and the capillary array structure comprises a plurality of capillary structures; and the height of each capillary structure is greater than or equal to the depth of the absorption cell. In the embodiment of the application, a plurality of absorption cells are arranged on the electrode sheet, and the capillary array structure composed of a plurality of capillary structures in each absorption cell; while ensuring the distribution density of the capillary structure, the absorption cell can also collect the leakage of the capillary type electrospray ion source in actual work, the risk of influence or short circuit caused by the leakage of the capillary type electrospray ion source in actual work can be greatly reduced, and the stability of the capillary type electrospray can be improved.