47results about How to "Guaranteed normal sampling" patented technology

The invention discloses an underground layered gas-liquid two phase fluid pressure and temperature-retaining sampling device, which is arranged on the inner wall of a drilled hole or a sleeve and consists of a packer system, a liquid sample inlet system, a gas sample inlet system, an automatic multi-way valve, a sampling system, a temperature control system, and an external pressure/flow control system, wherein a thermal-insulation layer or temperature control system covers the outside of the entire sampling device. The device accurately controls the layer under ground fluid sampling positionto realize gas and liquid fluid sampling at different layer positions of a stratum, ensures the temperature and pressure in a sampling process are consistent with those of the underground fluid, and improves the pressure and temperature-retaining degree of the fluid in the sampling process. The principle of the device is simple, the parts are assembled simply and the device is suitable for multilayer sampling in a drilled well and underground gas-liquid two-phase fluid sampling.

The invention discloses a flow-adjustable impact type compressed air microorganism sampler with sieve meshes, and is applied to the technical field of microorganism acquisition and quantity monitoring. The flow-adjustable impact type compressed air microorganism sampler comprises a shell, a sampling head and a controllable decompression gas circuit system. The sampling head is arranged on the top of the shell, the controllable decompression gas circuit system is arranged in the shell, an air inlet channel is arranged on the sampling head, a culture dish seat which directly faces the air inlet channel is arranged on the shell and is positioned below the sampling head, an air outlet channel is arranged on the culture dish seat, the controllable decompression gas circuit system comprises a gas circuit, a gas pressure regulating valve and a gas flow meter, the gas pressure regulating valve and the gas flow meter are arranged on the gas circuit, one end of the gas circuit on the shell is connected to a gas source connector, and the other end of the gas circuit is butted to the air inlet channel of the sampling head by a gas dispersing head. Compared with other treatment methods, the flow-adjustable impact type compressed air microorganism sampler has the advantages that the flow-adjustable impact type compressed air microorganism sampler is high in sampling speed and particle capture rate; the actual contents of bacteria in compressed air can be accurately expressed, and accordingly a perfect sampling method is proposed.

The invention discloses a sample adding device applied to a liquid biological reaction system and a control method, an X-axis moving component of the sample adding device is installed above a whole rack, a Z-axis moving component is arranged on the X-axis moving component, a sample adding component is arranged on the X-axis moving component, a Y-axis moving component is arranged on the whole rack, a tray component is installed on the Y-axis moving component, an inlet of a liquid circuit drive device is connected with a liquid storage device, a bubble sensor is installed on a pipeline, an outlet of the liquid circuit drive device is connected with an inlet of the sample adding component, and the X-axis moving component, the Z-axis moving component, the Y-axis moving component, the liquid circuit drive device and the bubble sensor are all connected with a PLC. The sample adding speed is greatly accelerated, the pollution is reduced in the process of adding a sample, and meanwhile, the sample can be added to eight biological reaction systems at the same time while the sample is added to the liquid biological reaction system.

The invention relates to a sediment pore water in situ high resolution sampler, and belongs to the technical fields of water sampling in hydrology and water resource science and environmental science.The sampler comprises a perforated plate, a groove plate and dialysis film, a plurality of elongated grooves are formed in one surface of the groove plate, the grooves are formed in the width direction of the groove plate, a plurality of rows of through holes are formed in the perforated plate, a plurality of through holes are formed in each row, the through holes are all formed in the width direction of the perforated plate, one side of the dialysis film closely fits the surface, where the grooves are formed, of the groove plate, the perforated plate closely fits the other side of the dialysis film, the groove plate is detachably fixedly connected with the perforated plate, and a groove corresponds to the position of a row of through holes; the sampler can achieve the collection of porewater of sediments of different depths under the condition that the original state of the sediments is maintained as much as possible, anaerobic situation is ensured and high resolution is guaranteed,and the assembly is simple.

The invention provides a detection device, and a detection method for hydrogen sulfide in an oil product. By the detection device and the detection method, the oil product can be sampled under the condition of isolating the air, so that the hydrogen sulfide can be prevented from escaping from the oil product to the air; furthermore, the hydrogen sulfide can be prevented from being oxidized by oxygen in the air; therefore, a small amount of hydrogen sulfide can be detected; and the detecting range of petroleum products is expanded.

The invention provides a tow bucket type sand-riverbed sand sampling system which comprises a sampling cylinder. A division board is axially arranged in the sampling cylinder, and the sampling cylinder is divided into two parts through the division board; one end of the sampling cylinder is enclosed; the other end of the sampling cylinder is provided with a sampling end, and the end face is of a slope; a stop board is arranged at the sampling end, and the lower edge of the stop board is connected with the division board and has the upper part of the sampling end enclosed; the lower part of a sampling section is provided with a sampling opening, and a water outlet is arranged in the position close to the stop block and above the sampling cylinder; an interconnecting hole is arranged in the enclosed end of the sampling cylinder so as to enable upper and lower parts of the sampling cylinder to be communicated; an inhaul fixing unit is arranged in the outside of the sampling cylinder; the inhaul fixing unit bypasses a roller of a river-bottom signal instrument via a first inhaul to be fixed with a boat through a second inhaul; the roller of the river-bottom signal instrument is connected with a sensor, and the sensor is connected with a counter weight through a third inhaul.

The invention discloses an adjusting method of the range of a pipette. The adjusting method comprises the following steps: setting a preset range value; acquiring an image of the current range value of the pipette; recognizing the range value in the image; and rotating a range rotary disc according to the current range value and the preset range value. The range of the pipette is adjusted to the preset range value by acquiring the image of a scale observation window of the pipette, recognizing the range value of the current pipette and then rotating the range rotary disc by a specified angle,so that convenience is brought for following direct operation and use. The application also provides an adjusting device of the range of the pipette applicable to the above adjusting method of the range of the pipette.

The invention mainly aims to provide a protective mask which can all around protect medical personnel and can prevent spray splashing of patients for swab sampling. The protective mask is characterized by comprising a mask body and fixing binding ropes, wherein two sides of the mask body are respectively provided with fixing columns; the fixing binding ropes are respectively fixed in the fixing columns; the upper side of the mask body is provided with an air exchange hole and a sampling hole; a filter gasket is fixedly arranged on the upper side of the air exchange hole; a sealing plug is fixedly arranged on the upper side of the sampling hole; the middle position of the sealing plug is provided with an inlet hole; and the mask body is of a transparent structure. The protective mask is used in a swab sampling process. According to the invention, the face mask is provided with a sealing hole, a handle of a swab passes through the sealing hole, and a doctor can see the location of the swab in the oropharynx and nasopharynx through the mask. Therefore, normal swab sampling can be ensured, the spray can be prevented from splashing into the air and on the doctor, and the infection possibility of the doctor is greatly reduced.

The invention discloses a geological content drilling and sampling device for geological surveying and mining, and belongs to the field of geological sampling. The drilling depth control unit comprises a lifting plate, connecting rods, a lifting rod, a sliding column, a top ring, a bottom ring and a control power assembly, a round hole is formed in the middle of the lifting plate, the connecting rods are arranged at the two ends of the front side and the rear side of the lifting plate correspondingly, and the ends of the two connecting rods on the same side of the lifting plate are connected through the lifting rod; sliding holes in the two ends of the lifting rod are vertically and slidably connected with sliding columns correspondingly, the tops of the four sliding columns are fixedly connected with a top ring, and the bottoms of the four sliding columns are fixedly connected with a bottom ring. The drilling efficiency is high, even a hard soil layer is easy to drill, the device is stable and not easy to jack up during drilling, soil generated during drilling can be discharged to the position far away from a drill hole, the soil is prevented from entering the drill hole again, it is ensured that sampling is not affected, and meanwhile continuous drilling is prevented from being affected.

The invention discloses a wide input voltage rectifying and voltage stabilizing circuit. An AC/DC bridge rectifier circuit is adopted to convert the input AC voltage into pulsating DC voltage, and a rectifying and voltage stabilizing value sampling driving circuit controls the switching on and off of an MOS (Metal Oxide Semiconductor) transistor voltage stabilizing driving circuit, thereby ensuring that when the input AC voltage is too high, the output voltage VDC2 is constant. For example, when the input AC voltage is greater than the voltage stabilizing set value, the rectifying and voltagestabilizing value sampling driving circuit switches off the MOS transistor voltage stabilizing driving circuit to stop charging a filter voltage stabilizing circuit; and when the input AC voltage is less than the voltage stabilizing set value, the rectifying and voltage stabilizing value sampling driving circuit controls the MOS transistor voltage stabilizing driving circuit to be switched on to charge the filter voltage stabilizing circuit, thereby keeping the adjusted voltage at the set constant value and meeting occasions with a wider input voltage range. The circuit disclosed by the invention has the advantages of simple circuit connection, high anti-interference capability, wide voltage input range, good sampling circuit stability, adjustable voltage output range and the like.

The invention discloses a motor controller (120) applied to an electric vehicle (1000), a microprocessor (10) in the motor controller (120) and a sampling triggering method applied to the microprocessor (10). The microprocessor (10) is connected with the driving motor (130) through the rotary transformer (160) and used for sampling a rotary transformer feedback signal, output by the rotary transformer (160), of the electric angle of the driving motor. The sampling triggering method comprises the steps that the signal generation module (11) generates an excitation fundamental wave signal to drive the rotary transformer (160) to work; the signal processing module (12) determines an excitation symbol according to the excitation fundamental wave signal, wherein the excitation symbol is formed by alternating a high-level signal and a low-level signal; the signal processing module (12) also determines a zero crossing point signal of the excitation fundamental wave signal according to the excitation symbol; and the phase shift processing module (13) performs phase shift processing on the zero crossing point signal to obtain a sampling trigger signal so as to trigger the microprocessor (10) to sample the rotary transformer feedback signal. According to the scheme, the use of peripheral circuits of the chip is reduced, the area of the printed circuit board is further saved, and the integration level of the product is improved.

The invention provides an FPGA-based multipath signal selection method and system, an electronic device and a storage medium, and the method comprises the steps: presetting a truth table in an FPGA internal register, and determining a data address corresponding to each business board; receiving a control instruction, and configuring storage information of the control instruction in an internal register of the FPGA; according to a mapping relation between a data address of the control instruction and an address element item of a truth table, sending data information of the control instruction to a corresponding service board; after receiving the corresponding data information, the service board sends or does not send a response signal in at least two clock periods; and accessing each service board in sequence, and establishing communication connection with the service board when the response signal is acquired. The system is mainly provided with a main control board and an external service board, the main control board mainly comprises an FPGA (Field Programmable Gate Array) and a clock chip, the FPGA can realize external interaction of signals, the clock chip provides a clock for the FPGA to ensure normal sampling of the chip, and the service board can realize different functions according to actual requirements.

The invention discloses a high-precision positioning puncture mechanism for CT puncture guiding. The high-precision positioning puncture mechanism comprises a connecting cavity, a third rotating shaft, a fourth rotating shaft, a worm, a worm gear, a rack, a rotating part, a bilateral rack, a clamping plate, a first rotating rod and a second rotating rod. The device can replace manual work to accurately position a marked part in actual use, so that a puncture needle can directly face the marked part through self-adjustment, positioning is more accurate, the puncture depth can be better controlled, sampling safety and accuracy are guaranteed, the labor intensity of medical staff is reduced, and high practicability is achieved; the upper part of the puncture needle can be sealed while the puncture needle is fixed through the linkage mechanism, so that the puncture needle is in a sealed state in an actual puncture process, sterile sampling is ensured, subsequent cleaning is convenient, and the overall operation is convenient. The problem that sampling errors or errors are caused due to the fact that the puncture position is still prone to deviation when a diagnosis and treatment physician conducts puncture sampling manually is solved.