43results about How to "Satisfy sampling requirements" patented technology

The invention provides a soil sampling device. The soil sampling device comprises an outer pipe, wherein a hollow sampling head is arranged at the lower part of the outer pipe; the sampling head is provided with a peripheral side wall for forming a hollow inner cavity; the sampling head is provided with a sampling hole communicated with the hollow inner cavity; an inner rod which can move back and forth in an up-down direction is arranged in the outer pipe; the inner rod is provided with a blocking structure for correspondingly opening and blocking the sampling hole when the inner rod moves up and down; the sampling hole is formed in the peripheral side wall; the sampling hole is provided with an inner hole which extends to an inner wall surface toward the hollow inner cavity of the peripheral side wall; the inner hole is higher than the bottom of the hollow inner cavity in the up-down direction; and the blocking structure is located in the hollow inner cavity and is used for opening and blocking the sampling hole through controlling the opening and closing of the inner hole when the inner rod moves up and down. Soil entering the hollow inner cavity falls into the bottom of the hollow inner cavity, and the soil is not pushed out of the hollow inner cavity by the blocking structure on the inner rod, so that the sampling success rate is improved.

The invention discloses an extension rod smoke gun which comprises a sampling head, an extension rod, an extension rod sealing connection assembly, a sampling assembly and a smoke gun handle, wherein the sampling head is arranged at one end of the extension rod smoke gun and is connected with the sampling assembly; one end of the sampling assembly is connected with the extension rod sealing connection assembly; the other end of the sampling assembly is communicated with the sampling head; the smoke gun handle is arranged at the other end of the extension rod smoke gun. The extension rod smoke gun is characterized in that the extension rod sealing connection assembly comprises a protecting pipe, a smoke dust pipe, a concave plug, a connecting nut and a convex nut; the protecting pipe is arranged on the outermost side of the extension rod sealing connection assembly; the smoke dust pipe is adjacent to the inner side of the protecting pipe; the concave plug and the convex plug are respectively arranged at two parts of the extension rod sealing connection assembly; a spring contact and a static contact are respectively arranged at the concave plug side and the convex plug side. The extension rod smoke gun disclosed by the invention has the benefits that sampling extension rods matched with the extension rod smoke gun can be selected according to different sampling conditions; after the extension rod smoke gun is detached, the whole length is short, so the extension rod smoke gun is convenient for carrying; besides, the sealing property of the connected part is good.

The invention discloses an asymmetrical phase encoding ranging method for a laser radar system. Typical phase encoding methods used in lidar systems place high demands on the system hardware. The steps of the present invention are as follows: the laser in the laser radar system emits a laser signal with constant intensity, and the modulator performs intensity modulation according to the modulation signal sequence; the modulation signal sequence adopts m sequence; the demodulator performs intensity modulation on the echo signal according to the demodulation signal sequence Demodulation; use gating mode to control the cumulative detection time and output of the detector; the detector outputs the accumulated signal to the signal processor; the order of the detector output signal shows the position of the correlation peak, so that the signal processor directly judges the demodulation The phase difference between the signal and the echo signal; according to the phase difference, the target distance is calculated. The invention adopts the asymmetrical phase coding method to measure the target distance, reduces the requirement of the system on the sampling rate of the detector, and reduces the calculation amount of signal processing.

The invention provides a positive pressure jet spiral sampling drill, which sequentially comprises a sampling drill, a spiral pump, an ejector and a joint outer sleeve from front to back. Materials are fed in a mode of matching the spiral pump with the ejector of the positive pressure jet spiral sampling drill, so that the requirement on the deep sampling of a coal bed can be met; meanwhile, the spiral pump and the ejector are integrated, air flow control when the cold bed is sampled by a small-diameter drill and reasonable solid-gas ratio in a drill pipe are matched by controlling the feeding speed of the spiral pump, the size of a jet hole of the ejector and compressed air pressure, so that the coherence of the sampling process is high, the drill pipe is prevented from being blocked by the materials and the sampling process is convenient and quick; in addition, intake air of a dual-wall drill pipe is controlled in the normal drilling process as required and sampling is performed at any time, so that arbitrary and accurate positioning is realized.

The invention relates to data terminal equipment which comprises a processor, a framer and an SA (synchronous and asynchronous) interface. The processor is provided with a plugging judgment pin, the framer is in communication with the processor, and the SA interface is provided with a plugging signal pin. The plugging signal pin is connected to the plugging judgment pin of the processor. The processor judges the DTE (data terminal equipment) and DCE (data communication equipment) to complete butt joint during jumping of signals of the plugging judgment pin by detecting the signals of the plugging judgment pin; after butt joint of the DTE and the DCE, the processor inquires the port state of the SA interface through the framer; when the port state shows that a physical layer is connected successfully but a protocol layer fails to negotiate, the processor inquires whether or not wrong packages exist in received messages of the SA interface, and if yes, the framer sends control commands to control the SA interface to overturn to receive a clock. Through the DTE, automatic overturning of the clock of the SA interface can be realized.

The invention discloses a high-efficiency air filter unit capable of on-site leak detection and in-situ disinfection. The invention consists of aerosol detection generation section, mixing section, upstream sampling section, high-efficiency filter compaction device, scanning leak detection device, disinfection device, filter resistance monitoring device and other parts, and the filter compaction device adopts eccentric compaction mechanism , The filter replacement method is the bag-in-bag-out method, the scanning leak detection device is an automatic scanning leak detection device, and the detection technology adopts the line scanning detection method. The invention is characterized by high-efficiency air filtration unit box body sealing, anti-sterilant corrosion, safe and convenient filter replacement; the invention meets the biological safety requirements, and is suitable for air supply and exhaust disposal systems of high-level biological safety laboratories.

The invention relates to a real-time linear sampling device for a mass spectrometer in a range of high pressure less than 20MPa. The sampling device comprises an independently installed stainless steel capillary tube for sampling in a high-pressure environment and a driven pump group connected to the mass spectrometer cavity. The device is characterized in that it also includes an independent single-stage differential pump group or independent two-stage differential pump group. The device provided by the invention meet the demand of sampling in a wide-range dynamic air pressure environment through ultrahigh vacuum equipment at low cost, realizes linear response of mass spectrum signals, and also can keep an optimized air pressure work environment of vacuum protected work test equipment. All the sampling meets the requirements of real-time sampling, no time delay exists, the response to trace component collection is sensitive, the device is simple in installation, and is helpful for environmental monitoring or chemical reaction basic research.