83 results about "Laser ignition" patented technology

The pulverized coal rotational flow stable combustion burner comprises a shell, a primary air pipe, a first swirler, a backflow cap and a laser generator assembly, a secondary air duct is defined between the primary air pipe and an air guide section, the first swirler is arranged in the secondary air duct, the backflow cap is arranged in the secondary air duct, and the laser generator assembly is arranged in the secondary air duct. The backflow cap is arranged in the combustion chamber and located at the outlet end of the primary air pipe. The laser generator assembly is used for emitting sheet-shaped laser beams into the combustion chamber so as to ignite pulverized coal in the combustion chamber. According to the invention, the size and the shape of the laser beam spot are adjusted, and the ignition efficiency and the stability in the pulverized coal combustion process are obviously improved by the aid of a cooling and combustion control strategy in which tertiary air and secondary air are matched; meanwhile, the laser power and mode can be flexibly switched, different coal quality and load working conditions can be adapted, the adaptability and combustion efficiency of the combustor are greatly improved, the service life of a hearth and related parts is prolonged, and the operation cost is reduced.

The rapid combustion device comprises a combustion bomb cover, a combustion bomb body, an air inlet / outlet, a laser ignition unit, a temperature measurement probe and a constant temperature unit, the combustion bomb cover and the combustion bomb body are detachably connected to form a sealed combustion cavity; a crucible support is arranged in the combustion cavity, the laser ignition unit is arranged above the crucible support, the temperature measurement probe is arranged in a temperature measurement heat storage layer of the combustion bomb body, and the temperature measurement heat storage layer absorbs heat generated by combustion of a sample in a crucible and conducts the heat to the temperature measurement probe to measure combustion heat and temperature rise; the air inlet and outlet is used for oxygenating the combustion cavity before a test and exhausting the combustion cavity after the test; a stirring assembly is further arranged in the combustion cavity, and the constant temperature unit is arranged on the outer side face of the combustion bomb body. Meanwhile, the invention provides a multifunctional combustion analyzer which comprises a weighing mechanism, a mixed gas detection device, an analysis control system and a spectrum detection device, rapid measurement is realized.

The present invention discloses a laser ignition device and a laser ignition control method. The laser ignition device includes: a control host; a laser emitting device electrically connected to the control host and, under control of the control host, emitting a laser toward a target to ignite the target; and a flame identification device electrically connected to the control host and configured to detect a flame and output a corresponding flame detection signal to the control host. The control host is configured to control the laser emitting device to emit or stop emitting the laser based on the flame detection signal. The present invention can solve the problem of high energy consumption in existing laser igniters.

The invention relates to a photothermal conversion material and application thereof, and belongs to the technical field of laser ignition. The photothermal conversion material comprises a composite material formed by loading gold particles on titanium carbide nanosheets and fluorinated alkyl bonded on the surface of the composite material. Gold particles are loaded on the titanium carbide nanosheets, the photothermal conversion performance of the titanium carbide nanosheets can be enhanced on the physical level, meanwhile, fluorinated alkyl silane is adopted for modifying the composite material, the photothermal conversion material can generate CFx free radicals under laser irradiation, oxygenolysis of the titanium carbide nanosheets is accelerated through a chemical reaction, and the photothermal conversion performance of the titanium carbide nanosheets is improved. A TiO2 hardened layer generated by the titanium carbide nanosheet under laser irradiation is broken through, the titanium carbide nanosheet is completely oxidized, energy release of the titanium carbide nanosheet is improved to the maximum extent, high-temperature pulses are instantly generated, and when the titanium carbide nanosheet is used for laser ignition, combustion of energetic materials can be rapidly triggered under low laser energy irradiation.

The invention discloses an array type laser ignition system and method for a safety air bag gas generator. The system comprises a collision sensor, a central control system, an array type laser emission assembly, an external pipe shell and a safety air bag. The array type laser emitting assembly comprises a positive electrode shell, a negative electrode shell, a laser semiconductor light-emitting chip array plate, a gold wire, a lens sleeve shell, a collimating lens and a focusing lens. Laser semiconductor light-emitting chips are distributed on the laser semiconductor light-emitting chip array plate in an array manner; the ignition method comprises the steps that when an automobile is collided, the collision sensor detects collision force, a signal of the collision force is transmitted to the central control unit, the central control unit judges the collision state according to the amplitude and time of the signal and preset parameters, and the central control unit sends an ignition signal mode of the array according to the collision state. The ignition output form and the output energy are controllable, and the situation that the safety air bag stops working due to the fact that a single ignition element breaks down is avoided.

The present invention provides a laser ignition device for thermal combustion, comprising: a light generating assembly, a light transmission assembly, an ignition assembly, and a light blocking assembly. The light generating assembly includes a first light source configured to emit a first light beam, the first light beam being a laser. The light transmission assembly is configured to transmit the first light beam to the ignition assembly. The ignition assembly includes a light guiding assembly and an ignition nozzle located at the end of the light guiding assembly. The light guiding assembly is configured to guide the first light beam along a guiding direction and ejected through the ignition nozzle for ignition. The light blocking assembly is located on a side of the ignition nozzle away from the light guiding assembly in the guiding direction and is configured to block the entire first light beam ejected from the ignition nozzle. The laser ignition device utilizes laser-assisted ignition, which not only serves as an ignition device but also assists and stabilizes combustion.

The present invention provides a metal-ligand protected silver nanocluster and its preparation and application in remote laser ignition. The metal-ligand protected silver nanocluster of the present invention is composed of RS ‑ and [(TC4A)6(V9O 16 )] 11‑ binary mixed ligand protected Ag 14 nanoclusters, with the molecular formula {Ag 14 [(TC4A)6(V9O 16 )](RS)3}. The structure and composition of the silver nanoclusters synthesized by the present invention are clear and novel; the preparation steps are simple, the preparation conditions are mild, and the raw materials are easily available, having the potential for industrial production; the obtained silver nanoclusters have excellent photothermal conversion performance, have good photothermal conversion effect and rapid heating rate under the irradiation of 660 nm laser, and have potential application value in the field of laser remote ignition materials.

The invention provides a cigarette lighting device and method for realizing stable laser output, and relates to the technical field of semiconductor laser application, the cigarette lighting device comprises a laser, a lithium battery, a voltage boosting and stabilizing circuit, a constant current driving circuit, a timing control circuit, a first switch and a second switch; the input end of the boost voltage stabilizing circuit is connected with the lithium battery, the output end is connected with the input end of the constant-current driving circuit, and the output end of the constant-current driving circuit is connected with the laser; the output end of the timing control circuit is connected with the grounding end of the constant current driving circuit; the first switch is arranged between an enabling pin of the voltage boosting and stabilizing circuit and a power supply and is used for controlling the voltage boosting and stabilizing circuit to be switched on and switched off; the second switch is connected with the trigger end of the timing control circuit and used for triggering the timing control circuit to output signals. According to the cigarette lighting device and method, tobacco shreds can be lighted within two seconds, the power density is close to 1 W / mm, and the power density is far better than that of a traditional laser lighting scheme.

The invention belongs to the field of laser ignition, and discloses a film medium suitable for rapid laser ignition of pyrotechnic composition, the film medium is composed of a transparent substrate, a metal film deposited on the surface of the transparent substrate and an isolation chamber connected with the metal film, the metal film is a Ti-Al double-layer film, and the isolation chamber is a rigid sheet with a round hole in the center. The film medium can obviously shorten the laser ignition delay time on the premise of not changing the physicochemical properties of the pyrotechnic composition and not influencing the laser sensitivity of the pyrotechnic composition under the combined action of jet impact heat transfer and film fragment impact of film ablation products such as plasma and metal vapor converted from pulse laser energy.

The utility model belongs to the field of laser devices, and discloses a containing device and laser ignition equipment. The containing device comprises a protection box body, a mounting platform, a laser transmitter and a laser control device. An accommodating cavity is formed in the protection box body; the installation platform is arranged in the containing cavity, a working support and a storage support are arranged on the upper end face of the installation platform, the installation platform and the bottom wall face of the containing cavity are arranged in a spaced mode, and a controller containing section is formed between the installation platform and the bottom wall face of the containing cavity; the laser emitter is selectively mounted on the working bracket or the storage bracket, and the laser emitter is used for emitting laser; and the laser control device is arranged in the controller accommodating section, is electrically connected with the laser transmitter and is used for controlling the laser transmitter to emit laser.

Provided are a laser ignition device and a preparation method thereof. The laser ignition device includes a housing (10), a light-transmissive container (20) and a laser-emitting unit. The light-transmissive container (20) is located in the housing (10). The laser-emitting unit includes multiple lasers (30), where the multiple lasers (30) are disposed between the housing (10) and the light-transmissive container (20), and light emission directions of the multiple lasers (30) are towards the light-transmissive container (20). A to-be-atomized raw material and a heat-absorbing material are disposed in the light-transmissive container (20), and the multiple lasers (30) are configured to heat and atomize the to-be-atomized raw material; the heat-absorbing material is used for absorbing heat to increase the atomization degree of the to-be-atomized raw material.

The invention relates to the technical field of gas turbine engines, and discloses a laser ignition device and a combustion chamber with the same. The laser ignition device comprises a laser mounting seat, a laser ignition device, a laser ignition device and a laser ignition device, wherein an igniter mounting hole and a protection assembly mounting hole are formed in the laser mounting seat; a lens body on the igniter assembly extends into the igniter mounting hole; the lens protection assembly comprises a shell and a valve, the shell is fixedly connected with the laser mounting base, an air leakage hole is formed in the shell in a penetrating mode, the valve is rotationally mounted in the shell, an extension part is connected to the valve, a shielding part is mounted at the end, away from the valve, of the extension part, and rotational flow blades are arranged on the valve in the axial direction of the shell. According to the laser ignition device, the lens protection assembly is arranged, the air flow in the combustion chamber is used for driving the valve to rotate, and automatic shielding and exposure of the lens body in the ignition state and the non-ignition state are achieved. The exposure time of the lens body under high-temperature airflow is effectively shortened, the lens body is prevented from being polluted, scraped and corroded, and the service life of the lens body is prolonged.

The invention relates to the field of casting technologies, and more particularly to centrifugal apparatus for producing cast materials synthesized during the combustion of highly exothermic powder compositions using self-propagating high-temperature synthesis (SHS) methods. The present centrifugal apparatus comprises a rotatable arm of a rotary centrifuge, said rotatable arm being mounted on a supporting base and having two pivotable baskets arranged symmetrically on the beam thereof, the baskets having reaction units for receiving a refractory mould containing an exothermic SHS composition. The apparatus is provided with a remotely disposed computer console for controlling each of the following: a system for actuating an electric motor of the rotor, a system for cooling a water-cooled segmented shell, a system for the laser ignition of SHS compositions, and a backup system for igniting compositions by means of an electrical tungsten coil. In the laser ignition system, an optical device is used to deliver laser radiation, said device being mounted proximate the axis of rotation, wherein a beam is refracted by a prismatic mirror onto the surface of an exothermic SHS composition. In the cooling system, pipes for the supply and removal of water via shutoff valves, a heat exchanger and centrifugal circulating pumps are connected to a tank of the cooling system. The technical result is an increase in the efficiency of the process of producing cast materials and an increase in the quality of the materials produced.

The utility model belongs to the field of laser devices, and discloses laser ignition equipment. Comprising a protection box body, a mounting platform, a laser transmitter and a laser control device. An accommodating cavity is formed in the protection box body; the installation platform is arranged in the containing cavity, a working support and a storage support are arranged on the upper end face of the installation platform, the installation platform and the bottom wall face of the containing cavity are arranged in a spaced mode, and a controller containing section is formed between the installation platform and the bottom wall face of the containing cavity; the laser emitter is selectively mounted on the working bracket or the storage bracket, and the laser emitter is used for emitting laser; and the laser control device is arranged in the controller accommodating section, is electrically connected with the laser transmitter and is used for controlling the laser transmitter to emit laser.

The invention discloses a precise irradiation modularized solid propellant laser ignition experiment device which comprises a laser adjusting part, an incidence part, a combustion chamber, an observation window, a laser checking part, an illumination part and a control part. The laser adjusting part comprises a mounting plate, a CO2 laser, a laser frame, an electric rotary table, a pitching table and a light path part; the combustion chamber is provided with an inner cavity and a top cover, a prescription containing tube is arranged in the combustion chamber, the incident part is arranged on the top cover, and the incident part and the top cover are provided with light channels and are located on the same vertical line with an opening of the prescription containing tube; the observation window is arranged on the combustion chamber side wall; the laser checking part comprises a motor mounting seat, a first motor and a separation blade, the separation blade is detachably mounted on the rotating shaft through a first connecting piece, and a through cross-shaped hole is formed in the separation blade; the lighting part comprises a lamp holder and a lighting lamp; and the control part is connected with the CO2 laser and the two motors. The laser direction can be adjusted in a three-dimensional space under the condition that the laser frame is not moved, the laser can be easily aligned with a propellant below, accurate incidence is achieved, and a laser ignition experiment is facilitated.

The present invention relates to a laser ignition system for a large-caliber artillery, which provides a linear laser beam shape, and the ignition system of the present invention evenly combusts a cylindrical large-caliber artillery propellant with a hollow center in an energy-efficient manner using a laser in longitudinal and radial directions.

The application belongs to the technical field of hydrogen storage metal material testing, and provides a hydrogen storage metal dust gas-solid two-phase combustion device, which comprises a testing system, an environment control system, a laser ignition system, a gas conveying system, a reaction product real-time collection system, a waste gas discharge and recovery system and a control console; the testing system is assembled and cooperated with a continuous testing mechanism to realize rapid and continuous testing; the environment control system adopts a temperature and humidity sensor to monitor the temperature and humidity in the testing cavity, adjusts the temperature and humidity of the testing cavity through a water mist pump, and the laser ignition system is used for completing the test ignition action; the gas conveying system supplies gas to the testing system to change the metal powder from a stacked state to a suspended state; the reaction product real-time collection system and the waste gas discharge and recovery system are used for collecting and discharging the reaction product; the hydrogen storage metal dust gas-solid two-phase combustion observation is completed through the cooperation of the systems; through rotating the continuous testing mechanism, the next testing cavity can be quickly rotated to the testing and observing position while emptying the previous testing cavity and restoring the environment parameters in the testing cavity, and the next test is continued, so that the continuity of the testing process is ensured and the testing efficiency is improved.

A laser ignition device includes a housing, a light-transmissive container and a laser-emitting unit. The light-transmissive container is located in the housing. The laser-emitting unit includes multiple lasers, where the multiple lasers are disposed between the housing and the light-transmissive container, and light emission directions of the multiple lasers are towards the light-transmissive container. A to-be-atomized raw material and a heat-absorbing material are disposed in the light-transmissive container, and the multiple lasers are configured to heat and atomize the to-be-atomized raw material; the heat-absorbing material is used for absorbing heat to increase the atomization degree of the to-be-atomized raw material.

The invention relates to a laser igniter for a combustion chamber, wherein the laser igniter has at least one optical component and is designed to focus a laser beam onto a focal point, wherein the at least one optical component is movably arranged in such a way that the focal point of the laser igniter can be changed in order to thereby increase the reliability of an ignition. The invention further relates to the use of the laser igniter for igniting a rocket engine, an internal combustion engine or an aircraft gas turbine; and to a method for operating a laser igniter having at least one optical component and for focusing a laser beam onto a focal point, comprising moving the at least one optical component in order to change the focal point.

This application discloses a tetrazine energetic material and its preparation method and application, which belongs to the field of laser detonation and ignition technology. The energetic material includes MC2H x N 10 O y crystal; M is selected from any one of Mn, Fe, Co, Cu, Zn, Cd, and Ni; when M is selected from any one of Mn, Fe, Co, Cu, Zn, and Cd, x=8, y=7; when M is Ni, x=10, y=8. The tetrazine energetic material, as a laser detonation ignition material, generally requires lower laser detonation ignition energy than previously reported compounds and overcomes the serious ClO4 ‑ Despite the shortcomings of ion contamination and high laser ignition threshold, it has important commercial application value in the field of laser initiation and ignition.

The invention provides method for igniting pressurized fuel, the method comprising placing fuel into a combustion chamber; mixing the fuel with supercritical carbon dioxide and oxidizer to create a mixture; and contacting the fuel-air mixture with a laser, whereby the laser is pointed to a first point within the chamber. Also provided is a laser ignitor for carbon dioxide combustors, the ignitor comprising: an elongated housing capable of varying in length, the housing having a first proximal end and a second distal end; a laser head in close spatial relationship to the proximal end, wherein the laser head generates a first laser beam; a seal at the distal end that is optically transparent to the laser beam and physically opaque to combustion contaminants; an algorithm for directing the first beam to a first point within a combustion chamber for a first period of time; and an algorithm for directing a second laser beam to a second point within the combustion chamber for a second period of time.

The utility model discloses an integrated laser ignition device which comprises a device box body, a laser emission gun head and a program control module arranged in the device box body, and further comprises a remote controller for controlling the laser emission gun head, and an operation panel is arranged at the upper end of the device box body. The laser emission gun head is connected to a program control module in the device box body through an optical fiber, a manual damping holder for installing the laser emission gun head is further arranged at the upper end of the device box body, a power source is arranged in the device box body, and a charging interface electrically connected with the power source is further formed in the outer side of the device box body. And a standby power supply is also arranged on the outer side of the device box body. The device can be used on site without assembling equipment, and can be taken and used immediately; the laser power of the device reaches 350W, and a target point can be heated in a short time to ignite combustible gas; the aiming angle of the gun head can be adjusted through the mechanical holder, operation is easy, the using space is not limited, and flexibility is high.

A device / system for firing a firearm round by igniting a specialized propellant in a specialized shell / casing / cartridge (hereinafter cartridge) with laser optics. The preferred embodiment and the system disclosed herein is intended for retrofitted use in a bolt action rifle, however, the principle may be applied to embodiments for pistols, shotguns and military munitions with minor changes to the laser's power, the focal lens for the cartridge and the laser ignitable propellant. The munitions cartridge design, its focal lens / window and column of charge constitute a critical element of this laser ignition device.

The utility model relates to the technical field of explosive laser ignition devices, and provides an explosive laser ignition device which comprises a protection seat, a first installation part and a second installation part are arranged at the top and the bottom of the protection seat respectively, the protection seat is further provided with a laser protection channel, and the laser protection channel is located between the first installation part and the second installation part. And the laser ignition piece is arranged on the first mounting part. By means of the technical scheme, the problem that in the prior art, even if the height of the incinerator is used, the situation that the laser ignition device is damaged by substances generated by explosion of explosives possibly cannot be avoided is solved.

This invention provides a cigarette lighting device that achieves stable laser output, relating to the field of semiconductor laser application technology. It includes a laser, a lithium battery, a boost regulator circuit, a constant current drive circuit, a timing control circuit, a first switch, and a second switch. The input terminal of the boost regulator circuit is connected to the lithium battery, and its output terminal is connected to the input terminal of the constant current drive circuit. The output terminal of the constant current drive circuit is connected to the laser. The output terminal of the timing control circuit is connected to the ground terminal of the constant current drive circuit. The first switch is located between the enable pin of the boost regulator circuit and the power supply, used to control the opening and closing of the boost regulator circuit. The second switch is connected to the trigger terminal of the timing control circuit, used to trigger the timing control circuit to output a signal. The cigarette lighting device provided by this invention can ignite tobacco within 2 seconds, with a power density approaching 1W / mm², far exceeding traditional laser ignition solutions.

The invention relates to a miniaturized laser ignition SiP module, which comprises electrode pins, a circuit substrate, a laser chip, a detector chip, a focusing lens group, a security switch, an ignition window, a packaging shell and a functional circuit, and is characterized in that a bonding pad is arranged on the circuit substrate, and a plurality of layers of metal wires are printed on the circuit substrate and are used for welding the laser chip, the detector chip and the functional circuit; the circuit substrate is fixed in the packaging shell, and overall airtightness is achieved through seal welding. When the ignition SiP module works, an external circuit signal is transmitted into the functional circuit through the electrode pins, the functional circuit controls the laser chip, the detector chip and the security switch, the laser chip outputs laser, the detector chip feeds back and outputs laser power, the focusing lens group focuses the laser, and the laser is output from the ignition window through the security switch to complete ignition. Based on the SIP technology, devices are assembled on the front layer and the back layer of the circuit substrate to achieve the laser ignition module, the size of an existing ignition module is greatly reduced, and an efficient and compact laser ignition solution is provided.

Laser igniter for a combustion chamber, wherein the laser igniter has at least one optical component and is configured to focus a laser beam onto a focal point, wherein the at least one optical component is arranged to be movable such that the focal point of the laser igniter can be changed in order to increase the reliability of an ignition; use of the laser igniter for the ignition of a rocket engine, an internal combustion engine or an aircraft gas turbine; and method for operating a laser igniter with at least one optical component and for focusing a laser beam onto a focal point, comprising moving the at least one optical component to change the focal point.

The invention provides an aluminum-niobium alloy for high-purity niobium and a preparation method of the aluminum-niobium alloy. The preparation method comprises the following steps: (1) pretreating high-purity niobium oxide, high-purity aluminum particles and a slag former, and mixing to obtain a mixed material; and (2) putting the mixed material obtained in the step (1) into a crucible of a vacuum thermit furnace, carrying out vacuum thermit reaction after vacuumizing treatment, and cooling along with the furnace to obtain the aluminum-niobium alloy for high-purity niobium, the vacuum aluminothermic reaction comprises laser ignition and laser heat treatment which are carried out in sequence. According to the method, the ignition mode of the vacuum thermit reaction is optimized, external impurities introduced in a traditional ignition mode are reduced, external energy can be provided for a reaction system, the slag-liquid separation effect is improved, the high-quality high-grade aluminum-niobium alloy is prepared, and meanwhile a production scheme is provided for a high-quality precursor for high-purity niobium.

The invention discloses a substrate, a laser and a fixedly arranged positioning seat in the field of excitation devices. A connecting plate is arranged on the base plate in a sliding manner and is driven by a telescopic piece; an adjusting plate is arranged on the laser, and the adjusting plate can be rotationally and adjustably arranged on the connecting plate; a safety box is further arranged, the safety box is arranged below the positioning seat, and flowing cooling liquid is arranged in the safety box; wherein the telescopic piece drives the laser device to move, and intermittent firing on the cartridge case in the positioning seat is achieved; the movable laser device is designed, the position of the laser device is switched through the telescopic part, during use, the cartridge case is fixed in the positioning seat, the telescopic part is started to drive the laser device to make contact with the bottom of the cartridge case to conduct firing operation, removal of residual gunpowder in the cartridge case is completed, the bottom of the cartridge case communicates with the safety box in the period, and running water flows into the safety box during actual use; rapid fire extinguishing can be achieved, safety is improved, the propagation speed of explosion noise in the safety box in the process is reduced, and the function of reducing noise is achieved.

This invention relates to an observation device for the evolution of laser ignition reactions in energetic materials. The device comprises an upper metal cylinder, a lower metal cylinder, a first camera, a second camera, a first reflector, a second reflector, a laser igniter, and a hydraulic press. The upper metal cylinder has a first observation window and a first laser illumination window on its surface. The first reflector is located inside the first observation window, and the first camera is located outside the first observation window. A first transparent window is located at the bottom of the upper metal cylinder. The lower metal cylinder is identical to the upper metal cylinder. An experimental sample is placed between the first and second transparent windows. A hydraulic press is located below the lower metal cylinder. The laser igniter ignites the experimental sample outside the first and second laser illumination windows. This invention offers a simple experimental process, can acquire a large amount of ignition process data, and fully utilizes multi-factor coupling analysis to understand the hotspot propagation mechanism.