226results about How to "Improve sampling quality" patented technology

The invention relates to a water quality sampling robot for full-automatic surface water, which comprises a hull, a driving device, a control device and a sampling device, wherein the control device comprises a navigation device, a central processing unit and a communication module; the sampling device comprises a weather and water quality monitoring sensor, an underwater sensor and a sampling pipe retractable device; the navigation device comprises a GPS satellite positioning sensor, an electronic compass and an acceleration sensor; the navigation device is electrically connected with the central processing unit and the communication module; the communication module is connected with a base station through a wireless signal; the hull is provided with a radar, a laser ranging sensor obstacle avoiding device, a fixing agent dripping device and an insulation box; and the control device is electrically connected with the driving device and the sampling device to realize automatic sampling and automatic navigation on the hull. The water quality sampling robot has the advantages of small volume, light weight, adoption of electric drive and no pollution emission; and compared with large-scale sampling vessels, the water quality sampling robot not only saves energy consumption and labor power, but also reduces cost and use threshold.

A single phase sampling apparatus and method for retrieving a formation fluid sample at or above the bubble point of the sample. The apparatus utilizes a gas charge contained between a sample piston and a charging piston to maintain a formation sample at the desired pressure. The charging piston utilizes the hydrostatic pressure present at the depth of the desired formation sample to compress and therefore increase the gas charge to the appropriate pressure necessary to maintain the formation sample at the desired pressure. The utilization of hydrostatic pressure to increase the pressure of the gas charge allows the use of a low pressure gas charging system to prepare the apparatus prior to sampling, thereby increasing the safety and ease of use of the device.

The invention discloses a path-based knowledge graph embedding method, which comprises the following steps of for a given single knowledge graph or a joint knowledge graph consisting of two knowledgegraphs, firstly sampling the given single knowledge graph by using a partial random walk method; next, modeling the obtained sampling path by using a new jumping cyclic network, so that the network can overcome the defect that the traditional cyclic neural network cannot identify the knowledge graph structure while effectively learning the dependency among elements in the path. For the output of the jump recurrent neural network, a type-based noise comparison estimation method is adopted to efficiently evaluate the loss of the network, and iteration is carried out in a feedback updating mode to carry out training. Compared with the prior art, the knowledge graph embedding trained by the method has the advantages of high expressibility, strong generalization ability and the like, and the accuracy and the efficiency of knowledge graph completion and entity alignment can be remarkably improved by applying the method.

The invention provides a transformer fault prediction method based on monitoring data of a dissolved gas in the oil of a transformer. The method includes the following steps of: optimization of historical online data of the dissolved gas in the oil of the transformer, model identification of the optimized data, estimation of auto-regression moving average model parameters, model checking and establishment. With the transformer fault prediction method adopted, the content of the characteristic gas in the oil of the transformer at any time point in the future can be predicted, and therefore, the faults of the transformer can be judged, and maintenance measures can be put forward. Compared with the prior art, the method can improve sample quality, embody individual characteristics of the transformer and reflect a characteristic that the dissolved gas in the oil changes with time. Since data obtained through adopting the method do not change abruptly, the method can make more stable and concise physical interpretation compared with a prediction model which is established through adopting traditional machine learning. With the transformer fault prediction method adopted, the accuracy of online data prediction of the dissolved gas in the oil of the transformer can be improved, and fault prediction and maintenance measures can be more accurate and reliable; a reliable guarantee can be provided for the maintenance and use of the transformer; and the service life of the transformer can be prolonged.

The invention discloses a transfer learning method and device. The method comprises setting relevant parameters of transfer learning and performing initialization; starting transfer learning iteration to obtain automatic annotation data; when the number of the iteration meets an iteration cycle, performing error detection on the automatic annotation data serving as samples in the iteration cycle to determine the sample relative quality of the iteration cycle; according to the sample relative quality, determining whether to delete or retain the samples and determining whether to continue the transfer learning iteration; when the transfer learning iteration is stopped, outputting the retainer samples and a transfer classifier. The transfer learning method has the advantage that, during a transfer learning process, the learning process is divided according to the transfer cycle, error detection is performed every full cycle, the samples are screened according to the sample relative quality determined through the error detection, so that low-quality samples can be eliminated to achieve the aim of improving the sample quality of automatic annotation data during the transfer learning process and further to improve the accuracy of a system applying the transfer learning method.

The invention discloses a collector of surface sediments, which comprises a cylinder at an upper opening, a hanging bracket set on the top of the cylinder, a guide tube set on the outer wall of the cylinder, some positioning anchors set on the bottom of the cylinder and some balancing weights set on the bottom of the cylinder; a circular scraper is set on a base plate of the cylinder and connected to the middle of the base plate through a revolving shaft in a rotary manner; and some mud scraping holes distributed in a radiation shape are set on the scraper, wherein a scraper blade for rotary mud scraping which is extended downwards is set on a hole wall of the mud scraping hole, a vertical baffle extended upwards is set on the hole wall of the mud scraping hole opposite to the scraper blade, height of the lower scraper blade is bigger than height of the upper surface of the base plate and a mud inlet is set on a corresponding part to the mud scraping hole. The collector of surface sediments is characterized by simper operation, high stability, good reliability, high-quality sampling and efficient sampling.

A remote operation wire line core sampling device capable of increasing the efficiency of working and maintaining the wall of a hole by using a stabilized sea-bottom core drill at a sea-bottom and adopting a wire line system, comprising a drill rod held by the chuck of the sea-bottom core drill, a wire line core barrel having, at the tip thereof, a bit for annularly drilling a ground, an inner tube assembly detachably incorporated in the wire line core barrel, and an over-shot assembly (5) having a function for the engagement thereof with a spear head part at the top end of the inner tube assembly. The device also comprises a water swivel (18) in which water supply ports (3) and (4) are formed at the upper and lower parts thereof and a modified built-in type over-shot assembly (4) are formed at the upper and lower parts thereof and a modified built-in type over-shot assembly (5) is incorporated therein so as to reside at the intermediate part thereof.

The invention discloses a short-term power load prediction method based on similar days and an RBF neural network, and relates to the field of power load prediction, a proper similar day is selected as a training sample in short-term power load prediction, so that the training process can be simplified and the prediction precision can be improved; and in order to reduce the influence of summer accumulated temperature effect on similar day selection, the similarity of the temperature and other load influence factors is calculated respectively, so that a similar day is selected according to thecalculated comprehensive similarity; besides, the prediction effect of the RBF neural network is improved; the training samples are clustered by using subtractive clustering, the initial value of fuzzy c-means clustering is set according to the clustering result, the hidden layer parameters of the RBF neural network are optimized by applying fuzzy c-means clustering, and finally short-term power load prediction is carried out by combining the similar day and the improved RBF neural network, so that the accuracy of short-term power load prediction can be obviously improved.

The invention relates to a preparation method of a fluorescent transparent ceramic disk for an LED (Light-emitting Diode). The preparation method comprises the following steps of adding rare-earth-doped yttrium aluminium garnet (RE:YAG) raw material powder with the mass ratio to water being 2:1 to 5:1, sintering aids and a dispersant into deionized water; mixing and performing ball milling for 0.5 to 4 hours to obtain homogeneously dispersed aqueous slurry; respectively adding water-solubility epoxy resin and a curing agent, and respectively performing ball milling for 1 to 4 hours and 0.1 to 1 hour; injecting the aqueous slurry into an assembling die formed by clamping a filler strip clamped in the middle of a two-layerbetween two layers of plates, forming to obtain a ceramic disk biscuit, and obtaining the fluorescent transparent ceramic disk through sintering procedure and annealing treatment. The ceramic disk prepared by the invention is controllable in size and thickness, high in sample quality, simple in process, high in preparation efficiency, and low in cost, and the preparation way of the RE:YAG transparent ceramic disk for the LED is greatly expanded.

The invention discloses an MIMO radar detection method based on double optical frequency combs and difference frequency multiplexing. According to the method, an existing MIMO radar detection technology based on microwave photon orthogonal difference frequency multiplexing is improved, and M paths of modulated optical signals of a transmitting end are generated through the following method: firstly, an optical carrier is divided into an upper path and a lower path; The local oscillator signal is used for carrying out modulation processing on the uplink optical carrier wave to generate a firstoptical frequency comb signal, and the intermediate frequency signal and the intermediate frequency linear frequency modulation signal are used for carrying out modulation processing on the next optical carrier wave to generate a second optical frequency comb signal; After the first optical frequency comb signal and the second optical frequency comb signal are coupled into one path, the first optical frequency comb signal and the second optical frequency comb signal are divided into M paths of modulated optical signals respectively consisting of a single intermediate frequency linear frequencymodulation spectrum line and a single local oscillator signal spectrum line through beam shaping filtering. The invention also discloses an MIMO radar detection device based on the double optical frequency combs and the difference frequency multiplexing. According to the invention, the structure of the transmitter can be greatly simplified, the implementation cost of the system is reduced, and the coherence between signals can be effectively ensured.

System and method for natural gas liquid sample pressure regulating vaporizer system including a vented cabinet having a gas sample input, a pressure regulator, a single path vaporizer, a liquid block, a heated regulator and a gas sample outlet, and a communications assembly including a temperature controller, a communication outlet, and a power input electrically connected via appropriate secure feedthroughs to the cabinet.

System and method for natural gas liquid sample pressure regulating vaporizer system including a vented cabinet having a gas sample input, a pressure regulator, a single path vaporizer, a liquid block, a heated regulator and a gas sample outlet, and a communications assembly including a temperature controller, a communication outlet, and a power input electrically connected via appropriate secure feedthroughs to the cabinet.

The invention discloses an edging device and method based on visual control. A conveying unit is used for conveying to-be-edged workpieces; image acquisition modules of visual control units are used for acquiring image data of the to-be-edged workpieces and send the image data to an image processing module, and the image processing module acquires contour features reflecting edges of the workpieces on the basis of the image data and acquires G codes for processing by a numerical control system according to the contour features; and finally, edging units are used for edging the to-be-edged workpieces efficiently according to the G codes under control of the control system. The edging device and method adopt the visual control manner so that edges of tableware trays are ground automatically, the visual control units and the edging units located at different stations are used for realizing high-precision acquisition of tableware contour images and high-precision grinding of the tableware edges, and the edging device and method have the advantages of high edging precision, high efficiency, easy operation, convenient maintenance and the like.

The present invention discloses soil sample sampling equipment based on a combined-type soil sample horizontal cutting apparatus, the soil sample sampling equipment includes two stand columns, an upper beam, an electric rotating seat, an electric lower press head, a soil sampling cutter located just below the electric lower press head, a lower press plate installed on the upper part of the soil sampling cutter and the combined-type soil sample horizontal cutting apparatus arranged on the outer side of the soil sampling cutter, the soil sampling cutter comprises an annular cutter and a cylindrical protection tube, a control box is arranged on the stand columns, the combined-type soil sample horizontal cutting apparatus comprises a lower position limitation ring, a plurality of side pushing panels and an upper pressure ring; the lower position limitation ring is a round ring with a cutting steel wire winding around the outer wall of one side, and the bottom of the lower position limitation ring is provided with a cutter edge, the outer side wall of the bottom of the lower position limitation ring is provided with two horizontal rings, two ends of the cutting steel wire respectively pass through the two horizontal rings, the side pushing panels are fixed on the upper pressure ring by a vertical connecting plate. The soil sample sampling equipment is simple in structure, reasonable in design, easy in use and operation, and good in use effect, and can simply and rapidly complete a sampling procedure, and the sampling effect is good.

The invention relates to a lever type soil-sampling ring cutter device. A separable lever device is added on a soil-sampling ring cutter and comprises a movable handle and a supporting column, wherein the supporting column is vertical to the base and is fixedly connected with the base; the movable handle is positioned at the upper part of the supporting column and is movably connected with the supporting column by a bolt; a sleeve capable of sliding along the movable handle is arranged at the middle position of the movable handle; a movable bolt on the sleeve is connected with a force applying rod; and a ring cutter is arranged under a pressure applying plate. When in soil sampling, a soil sample is arranged on the base of the ring cutter device, then an edge of the ring cutter is downwards arranged on the soil sample, the handle is pulled upwards to enable the pressure applying plate to be just arranged on the ring cutter, the movable handle is pulled downwards by force to enable the pressure applying plate to apply pressure uniformly on the ring cutter, so that the ring cutter enters the soil sample. The lever type soil-sampling ring cutter device provided in the invention has the advantages that by the improvement on the ring cutter, the common manual pressing mode can be used, the ring cutter can be smoothly pressed into the hard soil sample for sampling; in the whole sampling process, the force applying is uniform, and the efficiency and the quality of sampling are improved.

A slipping film and linear cutting type soft soil geotome and an operating method thereof are provided. A sampling tube is fixed below a rear seat; a tube shoe is fixed to the lower end of the sampling tube; a piston for pushing out a soil sample is arranged in the sampling tube. The slipping film and linear cutting type soft soil geotome is characterized in that the upper end of the tube shoe is provided with a tube shoe cavity, a thin film, a clamp ring and a cutting ring are pre-arranged in the tube shoe cavity, the rear seat is provided with a rear seat cavity, a vent valve and a wire winding-unwinding device are arranged in the rear seat cavity, the wall of the sampling tube is symmetrically provided with four vent holes, the rear seat cavity is communicated with the tube shoe cavity through the vent holes, a steel wire is arranged in one vent hole, the upper end of the steel wire is fixed to the wire winding-unwinding device, an inner slit is formed in the inner wall at the connection of the sampling tube and the tube shoe, and two ends of the thin film are connected to the cutting ring and the piston respectively. Sampling side frictional resistance and end resistance are reduced, sampling disturbance is reduced, sampling quality and sampling rate are increased, and the slipping film and linear cutting type soft soil geotome is applicable to manual sampling and drilling sampling.

The invention relates to a gas sampling device, belongs to the field of environmental monitoring, and particularly relates to a gaseous mercury sampling device for a stationary pollution source. The gaseous mercury sampling device for the stationary pollution source comprises a smoke pipe, a refrigerator, dryers, particulate matter filters, flow rate controllers, gas pumps and accumulative volume meters which are connected sequentially, wherein the tail part of the smoke pipe is provided with a temperature preservation box; a gas outlet of the refrigerator is connected with a gas discharge end of the smoke pipe by a heat tracing pipe. The gaseous mercury sampling device for the stationary pollution source has the following advantages: 1. the device is better in stability, heats up uniformly because of heat tracing of the smoke pipe in the whole process, and can prevent pipeline blocking; 2. the sampling quality is higher, a mode that a stainless steel coil pipe is cast by high-heat-capacity metal is adopted for the refrigerator, and moisture in flue gas can be removed well; 3. the sampling flow rate is more stable, and the special volume flow rate controllers can acquire wider sampling flow rate, so that air flow is more stable; 4. the sampling volume metering is more accurate, counting pulses are collected by a precise photoelectric encoder, and thus the metering precision of the sampling volume is improved substantially.

The invention discloses a device for preparing a leather sample with double holes. The device comprises a bracket 8, wherein a hydraulic press 9 is arranged at the bottom of the bracket 8; a base plate 10 is arranged on a pressure output end of the hydraulic press 9; a spring 11 is arranged at the two ends of the base plate 10; an upper positioning plate 12 is connected with the other end of the spring 11; a cutter substrate 1 is arranged on the lower part of the upper positioning plate 12; the lower part of the cutter substrate 1 is provided with a groove 2; the opening of the groove 2 is provided with a dumbbell-shaped cutter 6; hole cutters 3 are arranged at the two ends in the groove 2; leather is put on the base plate 10; the base plate 10 is pushed to move upwards by the hydraulic press; and the leather is driven to press towards the dumbbell-shaped cutter 6 and the hole cutters 3 on the lower part of the cutter substrate 1 by the base plate 10 so as to mold the leather sample at one time. The device has the characteristics of simple structure, light weight and convenient operation.

The invention provides a path planning method of double-mechanical-arm collaborative assembly operation. The path planning method comprises the following steps that a kinematics model and a dynamics model of the double-mechanical-arm operation are established; initial parameters are set, initial sampling is carried out, the distance between a tree node and a sampling point is calculated, and a nearest tree node is found to serve as a parent node; a candidate sampling point is added if no collision occurs; the potential energy of the sampling point is calculated, and roulette selection is performed according to the reciprocal of the potential energy to obtain the sampling point; the point with the cost less than r is added into a heavy connection point, the cost of the path formed by connecting the sampling point with the heavy connection points is calculated, and the connection mode of the shortest cost is selected to determine connection parent node of the sampling point; the connection mode with the lowest cost is selected to re-establish the parent-child relation of the node; the sampling point is replaced by using a target point when the potential difference between the sampling point and the target point is smaller than h, and a random tree is finished; and a planning path is determined according to the parent-child relation of the node of the random tree. According to thepath planning method of the double-mechanical-arm collaborative assembly operation, the high-quality path with short end movement distance, short operation time and low mechanical arm energy consumption can be planned.

The invention discloses an unmanned ship device for automatically sampling water quality. The unmanned ship device comprises an unmanned ship main body, a navigation locator, a navigation positioningprocessing circuit board, a high-definition camera and a central processing circuit board, wherein the middle part of the top end of the unmanned ship main body is fixedly connected with the navigation locator, the outer side of the bottom end of the navigation locator is connected with the inner side of the middle part of the top end of the unmanned ship main body, the middle part of the outer side of the unmanned ship main body is fixedly connected with an air bag ring, and the inner side of the air bag ring is connected with the middle part of the outer side of the unmanned ship main body.The unmanned ship needs to carry out water quality collection on lakes or rivers, when the water quality collection is carried out, the unmanned ship needs to run stably or stop in place, so that thewater quality collection efficiency can be guaranteed; and the air bag ring can increase buoyancy on two sides of the unmanned ship, the balance of the unmanned ship can be guaranteed, the condition that the unmanned ship turns over to overturn the water quality sample collected in the unmanned ship when the unmanned ship carries out water quality collection is avoided, and the quality of water quality collection is effectively guaranteed.

Aiming to the defect of a preparation method of a gradient metal material at present, the invention provides gradient metallic nickel being low in cost and easier in industrial production, and a preparation method of the gradient metallic nickel. The controllable preparation method is characterized in that an electroplating method is adopted to prepare the gradient metallic nickel, nickel is taken as a sacrificial anode, the variation of current density, additive concentration along with the time is controlled by a computer according to different microstructures or mechanical property requirements, nickel deposits under direct-current action to form crystalline grain scale gradient metallic nickel. The size of the gradient metallic nickel is almost not limited, the gradient distribution form is controllable, the size of a crystalline grain is gradually increased from 10-100 nm to 1-30 micron; no interfaces exist among hierarchical structure parts; the gradient metallic nickel is excellent in mechanical property, larger than or equal to 750 MPa in yield strength, 3-4 times of a traditional coarse grain in grain size, reaches more than 10% in tensile plastic deformation, and larger than or equal to 99.5% in overall sample density.

The invention discloses an underground water quality monitoring and sampling device and a use method thereof. The device comprises an operation round disc and a positioning circular ring, wherein thebottom of the operation round disc is connected with the positioning circular ring through a connecting rod, three hanging rings are arranged on a lifting round disc at the bottom of the operation round disc and are fixedly connected with one end of a steel wire rope, the other end of the steel wire rope bypasses a lifting pulley and a transition pulley and is fixedly connected with an automatic paying-off coiling block, and the bottom of the lifting round disc is connected with a sampling cylinder body through a support rod; an inner cavity of the sampling cylinder body is divided into multiple sampling inner cavities by a plurality of separation layers fixedly arranged in the sampling cylinder body, water inlets are annularly formed in the tops, below the sampling inner cavities, of theseparation layers, and a filtering net is arranged on the water inlets; and a sampling pipe is arranged in each sampling inner cavity. According to the underground water quality monitoring and sampling device, underground well water at different depths can be collected and sampled once, so that the sampling diversity is realized, and the time and the labor are saved.

The invention discloses an auxiliary device for the operation of a geological radar in the construction of a tunnel face of a large-section tunnel, and the device comprises a rigid frame, a power unit, a traction path adjustment apparatus, and a fixing apparatus. The rigid frame can be fixed on a tunnel construction trolley, and the traction path adjustment apparatus can achieve quick adjustment of position on the rigid frame, controls the movement path of the antenna of the geological radar, and guarantees the stability of the geological radar. An operator can remotely control the power unit from a safety region, so as to provide a pulling force for pulling the antenna of the geological radar to move along a preset measurement line. The device can provide more diversified modes of measurement line arrangement, improves the accuracy of advance geology forecast, guarantees the safety of the operator, and improves the work efficiency.

An automated cold storage apparatus (1), and related method thereof, provides a sample process management system that is a revolutionary approach to the storage and retrieval regarding critical samples. Samples in containers are stored and retrieved robotically through an airlock climate-control chamber (60) that is automatically dehumidified by a dry gas purge, such as a carbon dioxide or nitrogen purge or the like. This purge rapidly reduces ambient humidity to a desirable relative humidity (RH), e.g., less than about 15 % RH, virtually eliminating the accumulation of frost. Microplates are systematically identified using barcode technology, for example. Once through the climate-controlled chamber (60), the containers (i.e., samples) are robotically transferred to the rotary mechanism (43). This mechanism (43) transports the containers to a derived nest location upon the storage means, such as a carousel (20) or to one of the stationary addresses (26, 27).

A measuring probe is provided for measuring and taking samples in a metal melt. The probe has a measuring head arranged on a lance, wherein the measuring head carries at least a temperature sensor and a sampling chamber, and wherein the sampling chamber is surrounded, at least partially, by the measuring head and includes an intake duct that extends through the measuring head. The intake duct includes an inner section, which extends in the measuring head and has a length L and a minimum diameter D at least at one site in the inner section. The ratio L / D2 is less than 0.6 mm−1.

The invention discloses an intelligent ship base deep-sea sediment gravity sampling device and belongs to the technical field of underwater sediment sample collection in projects such as rock soil, geology, biology and environments. The intelligent ship base deep-sea sediment gravity sampling device comprises two parts, namely a gravity sampling system and a real-time data acquisition, analysis and processing system. The device is applicable to deep-sea sediment collection, and the sampling quality and efficiency can be evaluated and improved. Due to adoption of an integrated self-contained sensor, the sizes of sensors and sealing shells of the sensors can be reduced, stability and reliability of acquired data can be ensured, sensor data are transmitted through wireless Bluetooth, and thedata exporting efficiency is improved; with the combination of data processing software, real-time rapid data analysis is achieved, and sampling quality can be evaluated; and by using a computer software data simulation optimization system, design of a gravity sampler and a guide cover can be optimized in real time, and furthermore the sampling quality and the sampling efficiency are improved.

The present invention discloses a loess sample sampling device with soil sample cutting and extraction function, the loess sample sampling device with soil sample cutting and extraction function comprises a plurality of stand columns, a lower pressing plate, a horizontal fixed plate, a sampling cutter and a soil sample cutting and extraction mechanism, the sampling cutter is arranged on the bottom of the lower pressing plate, the horizontal fixed plate is provided with a lifting mechanism for driving the lower pressing plate to move up and down; the sampling cutter comprises a sampling ring cutter and a cylindrical protection casing, the sampling ring cutter vertically cuts into a loess soil layer from top to down, the cylindrical protection casing enters the loess soil layer synchronously with the sampling ring cutter, the soil sample cutting and extraction mechanism comprises a translational mechanism and a rotary cutting mechanism, the translational mechanism is located below the lower pressing plate, the rotary cutting mechanism is located below the translational mechanism, the rotary cutting mechanism comprises two translational cutting boards, two arc-shaped cutters, and multiple straight cutting steel wires, the two arc-shaped cutters are respectively arranged on the bottoms of the translational cutting boards, and the multiple straight cutting steel wires are connected between bottoms of the two arc-shaped cutters. The loess sample sampling device with soil sample cutting and extraction function is simple in structure, reasonable in design, easy to use and operate and good in use effect, and can be used for simply and fast completing a sampling procedure, and the sampling effect is good.

The invention discloses a video tracking method based on important region identifying and matching, which includes the following steps: first, identifying an important region of an initial target based on the minimum spanning tree theory to get a target important region, and constructing a target template; then, identifying an important region of the subsequent frame target expansion region, taking the region as a sampling region, and collecting samples; next, calculating the shape similarity value, the color similarity value and the Pearson correlation coefficient value between each sample and the target template, and carrying out weighted calculation on the three values to get the matching degree between each sample and the target plate; and finally, updating the target template based ona threshold comparison method to support follow-up tracking until the end of tracking. Through the method, a target object in a dynamically changing tracking scene can be better described based on important region identification. Through sample collection in the important region of a target, the sampling quality is improved. The accuracy and stability of tracking are enhanced.

The invention relates to an underground pressure wind spot sampling device. According to the underground pressure wind spot sampling device, a sample collection device is connected with a water converter with a pressure wind connector through a pipe, a double-wall drill pipe connected with the water converter is connected with a drilling machine, and the double-wall drill pipe is connected with a drilling bit. The underground pressure wind spot sampling device is characterized in that wind outlet inclined holes are formed in the outer wall of the drilling bit, and a wind inlet is formed in the top end of the drilling bit. The invention further discloses an underground pressure wind spot sampling process of the underground pressure wind spot sampling device. According to the underground pressure wind spot sampling device and process, positive-pressure sampling is realized, the drilling bit is provided with an injection pipe with injection inclined holes, and therefore negative-pressure smashed coal sampling is realized; besides, the structure is simple, spot sampling can be realized, the drilling bit does not need to be replaced, sampling is fast, and the quality of samples is high; according to the underground pressure wind spot sampling process, by the adoption of positive-pressure sampling, the influence of wind flow on the resolving speed of the coal samples can be reduced, as a result, coal powder below cuttings at the front end of the drilling bit can continuously and quickly enter the sample collection device through the center of the drill pipe, the sampling success rate is increased, and the determination result is more close to the actuality when the obtained coal samples are used for conducting gas content determination.

The invention discloses an anti-adhesion sampling head of a soot sampling gun, thus solving the present problem of adhesion between a sampling filter cylinder and the sampling head of a soot sampling gun. The anti-adhesion sampling head comprises: a circular tube type soot sampling head main body (1), a circular tube type filter cylinder holder (4) that is movably installed inside the circular tube type soot sampling head main body (1), a soot inlet end fixing ring (6) and a sampling head inlet end cover body (7) which is connected together with the circular tube type soot sampling head main body (1) through the soot inlet end fixing ring (6), an ring flange (5) positioned at the entrance of the circular tube type filter cylinder holder (4), concave semicircle anti-adhesion lines in a mesh arrangement are disposed on the inside wall at the entrance of the circular tube type filter cylinder holder (4), with the capping plug of the sampling head inlet end cover body (7) coated with a Teflon anti-adhesion coating. The an anti-adhesion sampling head of a soot sampling gun in the invention improves the sampling quality of a soot gun and is suitable for various soot sampling devices.