41results about How to "Increase the sampling area" patented technology

An explosive and narcotics detection system detects the presence of trace particles of materials that are adhering to surfaces. In order to detect such particles, to the particles are first dislodged or released from the surface, then transported to the detection instrument, and then accumulated on or in a particle collection device. When the sample collecting system and the target surface are in relative motion across the line-of-sight greater than fifteen centimeters per second, non-contact sample collection may be accomplished using a vortex or vortex attractor particle collector together with a plurality of air or aerosol jets. A plurality of large diameter vortex collectors may obtain samples at relative line-of-sight velocities greater than five feet per second over a large surface area and for a complex-shaped surface.

The utility model relates to a scanning nozzle atomization field droplet size and concentration space distribution analyzer, which is used in the technical field of measuring instruments. The invention includes: a programmable control rail frame, two fine-tuning supports, an optical sensor for particle size and concentration, an A / D converter and a computer. Among them, the particle size and concentration optical sensor is a separate structure, consisting of a transmitting end and a receiving end. The photoelectric signal is connected to the input end of the A / D converter through the wire, and the digital signal output by the A / D converter is transmitted to the computer through the wire. The invention is mainly applied to the spray field research of various nozzles, and has no special requirements for the working medium of the nozzles, and can even be used to measure the particle size and concentration spatial distribution of solid particles in the gas-solid two-phase jet flow, with a large sampling area, The concentration measurement error is small, the measurement process is easy to automate, and the experimental measurement cycle is short.

A laser interference lithography system with flat-top intensity profile comprises a laser source for emitting a coherent laser beam, a first beam expander for adjusting the coherent laser beam size, a refractive beam shaper for converting a Gaussian intensity profile inherent to the coherent laser beam into a flat-top one and outputting a first collimated laser beam, a second beam expander for receiving the first collimated laser beam and outputting a second collimated laser beam, a sample holder for holding a substrate, and at least one reflector for reflecting the second collimated laser beam to generate a third collimated laser beam. The second and third collimated laser beams are transmitted to the substrate at a predetermined angle to create an interference pattern exposed onto the substrate.

The utility model relates to a rotary impact ultrasonic rock grinding device driven by a single energy flow, which relates to an ultrasonic rock grinding device. The present invention aims to solve the problem that with the increase of the grinding depth of the existing impact ultrasonic rock grinding device, the grinding debris is not easy to be removed, and the accumulated grinding debris affects the subsequent grinding efficiency. The vertical-torsion composite piezoelectric transducer of the present invention is connected to the front end of the grinding shell assembly, the copper sleeve is installed at the inner rear end of the grinding shell assembly, and the grinding rod is horizontally installed in the grinding shell assembly. The grinding head is installed on the connecting piece of the grinding head, the front end of the grinding rod is in contact with the impact head of the longitudinal-torsional composite piezoelectric transducer through the free mass block, the rotor is sleeved on the front end of the grinding rod, and the preload spring is sleeved on the rotor , the recovery spring is set on the grinding rod, and the rear end of the recovery spring is in contact with the inner end surface of the copper sleeve. The invention is used in the field of deep space exploration.

The invention discloses a high-flux laser system suspended particle sampling device and method, belonging to the environment measurement field. The device is mainly composed of an upper template and a lower template, wherein the upper template is provided with 12 or more round slots by etching; a through concentric circle is arranged at the bottom of the round slot; a copper wire mesh is placed in the round slot; the lower template is provided with a copper wire mesh fixing circular ring by etching in a position corresponding to the round slot of the upper template, the copper wire mesh fixing circular ring is used for fixing the copper wire mesh in the round slot of the upper template and matches with the round slot, a through hole is formed by etching in the copper wire mesh fixing circular ring, the upper template concentric circle and the through hole in the copper wire mesh fixing circular ring are in through-communication; and the upper and lower templates are provided with position-corresponding threaded holes respectively, and can completely fit with each other and fix the inventive device at a laser gas outlet for sampling after the upper and lower templates are butt-jointed. The inventive method can realize simultaneous sampling by a plurality of copper wire meshes at one time, and has large sampling area. The inventive device is portable, and suitable for sampling suspended particles and aerosol at the container port.

The invention provides a multi-channel automated chamber system, comprising an air compressor, an infrared CO2 analyser, a buffer, a drier, a filter, a flowmeter, an air pump, a data acquisition unit and a plurality of chambers, wherein, an air cylinder is arranged between the side wall and an upper cover of each chamber, the air compressor is connected with a multi-ported valve which has a plurality of branches, each branch is provided with an electromagnetic valve, each gas branch is connected with the air cylinder inside each chamber; each chamber is connected with one multi-ported valve by a gas branch provided with an electromagnetic valve and the gas branch is connected in sequence with the buffer, the drier, the filter, the flowmeter, the infrared CO2 analyzer and the air pump and then is connected with another multi-ported valve; each branch of the multi-ported valve is connected with each chamber, each branch is provided with an electromagnetic valve to form a circulating gas path; the infrared CO2 analyzer is connected with the data acquisition unit by a circuit; the electromagnetic valve which is connected with the air cylinder and controls the extension of the air cylinder and the electromagnetic valve which is arranged on the chamber and is used for controlling the circulating gas path are connected with a logic controller by the circuit. The system has the advantages that the reaction speed is high, the efficiency is high, the all-weather continuous and circular detection of a plurality of places is realized, and the influence on the target to be detected is small.

The invention discloses a vibrating optical path component and a laser-induced breakdown spectrometer with the component. The vibrating optical path component includes an optical platform, a cantilever, a vibration generating device and an optical lens; The cross arm on the arm, at least one of the vertical arm and the cross arm is made of elastic material; the vibration generating device is arranged on the cantilever and is configured to adjustably generate a first vibration; the optical lens is arranged on the cantilever and is configured to allow light to pass through The light spot is formed; the first vibration is transmitted to the optical lens through the cantilever to generate a second vibration, and the light beam passes through the vibrating optical lens to produce the light spot movement phenomenon. The invention uses the cantilever to transmit the vibration generated by the vibration generator to the optical lens, so that the light passes through the optical transmission of the optical lens to form a spot on the surface of the measured substance to generate a spot movement phenomenon, which can increase the sampling area and maintain a stable plasma. Generated, enabling quantitative analysis with excellent repeatability and accuracy.

The invention provides a detection reagent for epithelial tissue cancer cells and a preparing and detecting method. The detection reagent for the epithelial tissue cancer cells is high in detecting sensitivity and reliable in detecting result. According to the detecting method, a whole-process sealing pushing-injecting mode is used, stimulation on a patient from special stink from a solution is avoided, meanwhile, time of solution and air contacting is shortened, a false positive result caused by quick oxidation is avoided, and detecting result accuracy is fully guaranteed. The detection reagent for the epithelial tissue cancer cells comprises, by weight, the components of 0.03%-2% of methylene blue, 5%-10% of fructose, 0.1%-1% of ascorbic acid, 1%-5% of folic acid, 40% of dimethyl sulfoxide, 3%-5% of acetic acid-sodium acetate buffer solution, 0.1%-1% of surface active agent and the balance of purified water.