31results about How to "Meet sampling needs" patented technology

The invention discloses a PM2.5 (Particular Matter 2.5) single-grade atmosphere sampling cutter. The PM2.5 single-grade atmosphere sampling cutter is roughly cylindrical; the PM2.5 single-grade atmosphere sampling cutter comprises a cutting opening cover layer, an impacting nozzle layer, an impacting plate layer, a particular matter collecting layer, a gas organic pollutant collecting layer and a gas discharging layer, wherein the cutting opening cover layer, the impacting nozzle layer, the impacting plate layer, the particular matter collecting layer, the gas POPs (Persistent Organic Pollutants) collecting layer and the gas discharging layer are sequentially sealed and connected in series; the impacting nozzle layer comprises impacting nozzles and an impacting nozzle plate; the impacting nozzles are arrayed at an equal interval and are vertically inserted into the impacting nozzle plate to form an annular ring; the impacting nozzles are internally provided with reversed conical through holes; and the impacting plate layer is provided with an impacting plate and the impacting plate is an annular groove. With the adoption of the PM2.5 single-grade atmosphere sampling cutter disclosed by the invention, the characteristic that a previous air sampling device has middle and small flow is broken through; and a flow design standard of 300 L / min can meet the POPs sampling requirements so that the cutting grain diameter of the cutter is accurate and the target of accurately layering the target particular matters under the cutting of an inertia impacting force can be realized.

The invention relates to a sampling module and an outdoor water quality monitoring device thereof. The sampling module comprises a sampling support, which is fixedly arranged on the top surface of a second partition plate and located between a first partition plate and the second partition plate. A water diversion ring is fixed in the sampling support; a drainage groove is formed in the inner sideof the water diversion ring, and the inner side of the water diversion ring is provided with a switching disc in a sealed and circumference manner. A first drainage channel and a second drainage channel are formed in the inner side of the switching disc; one end of the second drainage channel communicates with the top of the first drainage channel; the other end of the second drainage channel runs through the switching disc; the first drainage channel and the switching disc are coaxial, and the bottom of the first drainage channel and the top of a water conduit are assembled in a circumferentially-rotating and sealed mode; the water conduit is internally of a hollow drainage inner pipe; the bottom of the drainage inner pipe communicates with one end of a drainage pipe and one end of a water inlet pipe; the other end of the drainage pipe is led out of a housing and is lower than the lowest positions of the bottom plate and the drainage inner pipe; the other end of the water inlet pipeis sequentially communicated with a first one-way valve and a water pump and then, communicated with a water inlet head; and one side of the water inlet head is communicated with the water inlet pipe.

The invention relates to a particulate matter sampler with changeable filter membrane. The particulate matter sampler comprises a casing; a filter membrane storage mechanism, a first slider mechanism,a second slider mechanism and a third slider mechanism are mounted in the casing. The filter membrane storage mechanism is fixed to a supporting table and comprises a refrigerating cavity, a filter membrane barrel which hasn't been used for sampling and a filter membrane barrel which has been used for sampling; the filter membrane barrel which hasn't been used for sampling and the filter membranebarrel which has been sampling are arranged in the refrigerating cavity side by side. The first slider mechanism, the second slider mechanism and the third slider mechanism are all provided with photoelectric encoders. The first slider mechanism is connected with the filter membrane barrel which hasn't been used for sampling, the second slider mechanism is connected with the filter membrane barrel which has been used for sampling, and the third slider mechanism is mounted on a membrane changing platform transversely and disposed above the filter membrane storage mechanism. The membrane changing platform is provided with a membrane supply port, a recovery port and a membrane changing claw; the membrane supply port corresponds to the filter membrane barrel which hasn't been used for sampling in position, the recovery port corresponds to the filter membrane barrel which has been used for sampling in position, and the membrane changing claw is connected with the third slider mechanism. The particulate matter sampler has the advantages of high precision in automatic changing of the filter membranes, high positioning accuracy and high precision of sample data.

The invention relates to a high-side / low-side effective signal detection circuit comprising a microprocessor (U1), an electronic switch (Q1) and a series circuit. The series circuit comprises a pull-up resistor (R1) and a grounding resistor (R2). One end of the grounding resistor (R2) is grounded, and the other end is connected with a signal input end (SwIn). One end of the pull-up resistor (R1) is connected with a power source, the other end of the pull-up resistor (R1) is connected with one end of the electronic switch, and the other end of the electronic switch is grounded. One output end (Ctrl) of the microprocessor (U1) is connected with the control end of the electronic switch, and one input end (Input) of the microprocessor (U1) is connected with the signal input end (SwIn). By configuring the state of the output level of the output port of the microprocessor, high-side input or low-side input detection of the same input port is realized.

The invention discloses a cleaning mechanism and an outdoor water quality monitoring device thereof. The cleaning mechanism comprises a sweeping motor and a sweeping brush. The sweeping motor is mounted on a first partition plate, the sweeping output shaft of the sweeping motor penetrates the first partition plate and then is fixedly assembled with a first gear, the first gear and a second gear are in meshing transmission, the second gear is fixed to a sweeping cylinder in a sleeving mode, the other end of the sweeping cylinder penetrates a second partition plate, a third partition plate and abottom plate and then can be circumferentially and rotationally assembled with a supporting plate, and the sweeping cylinder further sleeves a guide cylinder and can circumferentially rotate relativeto the guide cylinder; the sweeping cylinder is in circumferential rotation and sealed assembly with the first partition plate and the second partition plate, and reciprocating threads are arranged on the portion, located between the third partition plate and the supporting plate, of the sweeping cylinder; the reciprocating threads and reciprocating protrusions are clamped and assembled in a sliding mode, and the reciprocating protrusions are arranged on the inner side of a magnet ring; the magnet ring is fixed to the top face of a scrubbing ring, countless first bristles are fixed to the outer wall of the scrubbing ring, and the first bristles can be tightly attached to the outer walls of probes.

The invention discloses a sampling system and method for filterable particles and condensable particles, which belong to the technical field of environmental monitoring. The system comprise a samplingnozzle, a sampling gun, a filterable particle collection device, a condensable particle constant temperature sampling tube, a sample collection bottle, a dryer, a flow monitoring and controller and an air pump. The system can accurately and efficiently collect filterable particles and condensable particles in sample gas. The whole system is maintained at a preset temperature throughout the entireprocess to ensure the uniformity of the form of condensable particles, and at the same time prevent the adsorption loss of condensable particles caused by condensation and the like. The device has the advantages of reasonable structure design and complete function. The temperature of each part of the system can be controlled to meet the sampling needs of various occasions. The system is flexibleand convenient, has high sampling efficiency, and fills the gap in collection and monitoring of filterable particles and condensable particles.

The invention discloses an impact type air sampler which comprises a sampling body and a limiting mechanism, an exhaust pipe works, so that external air enters an inner cavity of the sampling body from an air inlet pipe, the air entering from the air inlet pipe impacts sampling liquid, and when the sampling liquid splashes upwards, part of the splashed sampling liquid is blocked by a limiting element, so that the sampling liquid is prevented from splashing. The sampling liquid flows back into the inner cavity of the sampling body, part of the splashed sampling liquid falls to the top of the limiting element, the limiting element is obliquely arranged towards the bottom of the sampling body, and the sampling liquid still flows back into the inner cavity of the sampling body under the flow guide action of the limiting element, so that the loss of the sampling liquid is effectively reduced, and the long-time sampling requirement is met; meanwhile, the loss of an air sample is reduced. Meanwhile, the impact type air sampler can meet the sampling requirement under the condition that the air flow speed is large, the air microorganism sampling rate can be increased, and the accuracy of the sampling result is improved.

The embodiment of the invention discloses a multi-power-section voltage and current sampling method, device and system. The method is applied to a voltage and current sampling circuit and comprises the following steps: if a voltage and current sampling request is received, analyzing the voltage and current sampling request to obtain an input voltage and current signal and a rated voltage and current level of a frequency converter; controlling an adjusting unit to select a matched preset voltage and current gear so that a first operational amplification unit outputs a corresponding first outputvoltage after receiving the acquired voltage and current signal; converting the first output voltage into a first digital voltage signal; and determining a corresponding compensation coefficient according to a preset compensation coefficient table, thereby enabling the microprocessor to calculate and obtain a second digital voltage signal located in a preset digital voltage range according to thecompensation coefficient, the first digital voltage signal and a preset calculation rule. Multi-power-section voltage and current sampling can be realized, the maintenance pressure is reduced and thecost is saved.

The invention discloses a method and a device for simultaneously acquiring gas and granular ammonia and organic amino. The method comprises the following steps: I, performing air sampling, namely allowing ambient air to pass through a sampling inlet at a velocity of 100L / minute; II, collecting granular ammonia and organic amino, namely passing the sampled air through a quartz filtering membrane baked at high temperature so as to collect granular ammonia and organic amino; III, collecting gas ammonia and organic amino, namely further allowing the sampled air passing through the quartz filtering membrane to pass through a pickling filtering membrane, so that the gas-state ammonia and organic amino are absorbed by the pickling filtering membrane. The invention provides a method for sampling important inorganic and organic alkali nitrogen-containing compounds in the atmosphere simultaneously and has the characteristics of being simple and convenient to operate and low in cost, and a technical support for acquiring concentration of the alkali nitrogen-containing compound and studying gas-solid conversion process is provided.

The invention discloses a water quality dynamic sampling device for aquaculture industry, and belongs to the technical field of water quality sampling. The device mainly comprises a mounting frame body, a water quality dynamic acquisition element, an intelligent control cabinet, a biological expelling element and a power supply, through the arrangement of the water quality dynamic acquisition element, the sampling requirements of different water layers can be met, and the accuracy of water quality detection is improved; through the arrangement of the organism driving element, the driving forceon organisms is increased, and damage to part of organisms, which cannot be driven by ultrasonic waves, in the aquaculture water body is avoided; aquaculture water samples are collected at the same time through the multiple dynamic collecting heads, the sample collecting efficiency is improved, the area of a collecting area between the dynamic collecting heads is enlarged by adjusting the circular area formed by the arc-shaped adjusting blocks, and the detection accuracy of the collected samples is improved. The device has the advantages of stable operation and high collection efficiency, andis suitable for large-scale popularization.

The invention provides a sampler for brominated flame retardants in indoor air and a sampling and measuring method thereof, and relates to the technical field of analysis and detection. The sampler provided by the invention comprises a plurality of small solid-phase extraction columns connected in parallel, a flow meter connected with the outlets of the small solid-phase extraction columns, and adiaphragm vacuum pump connected with the outlet of the flow meter. The small solid-phase extraction columns are filled with filler, the filler comprises upper-layer CNWBOND HC-C18 filler and lower-layer CNWBOND NH2 filler, and the filler is separated by glass fiber sieve plates. According to the sampler disclosed by the invention, traditional and novel brominated flame retardants in air are directly enriched by the solid-phase extraction columns, the eluent can be directly subjected to nitrogen blowing concentration and then subjected to sample injection detection, the steps of solvent extraction and purification in a traditional sampling mode are omitted while the sampling requirements of different types of indoor environments are met, solvent consumption is remarkably reduced, the sampling process is simplified, and interference of uncertain factors on sampling measurement results is reduced.

The invention discloses a stop mechanism and an outdoor water quality monitoring device. The stop mechanism is used for unidirectional locking of a second reel, and the stop mechanism comprises a ratchet wheel, the ratchet wheel is coaxially installed and fixed on a fourth reel, and the ratchet wheel is provided with countless tooth grooves; the tooth grooves can be clamped and assembled with oneend of the ratchet wheel; a first hinge block and a second hinge block are respectively arranged on the ratchet wheel, a first hinge pin is installed on the first hinge block, the second hinge block is hinged to the side wall of a stop installation groove in a stop sliding block through a third hinge pin, the first hinge pin is assembled and fixed to one end of a first compression spring, the other end of the first compression spring is assembled and fixed to a second hinge pin, and the second hinge pin is hinged to the inner wall of the stop installation groove; stop sliding strips are arranged on the two sides of the stop sliding block respectively, are clamped with stop sliding grooves formed in the sliding base and can be assembled in a sliding mode; and the sliding base is fixed to afirst partition plate. According to the invention, basic water quality data can be automatically collected, and the collected data is sent to the terminal in real time in a wireless manner.

The invention discloses an AD sampling device, an AD sampling method and an electric appliance, the AD sampling device comprises an AD sampling unit used for collecting a to-be-sampled signal, a power supply unit used for supplying power to the AD sampling unit, and a signal generation unit connected with the AD sampling unit, the signal generation unit is used for outputting a reference signal to the AD sampling unit, and the power supply unit is used for supplying power to the AD sampling unit. The AD sampling unit compares the signal to be sampled with the reference signal to obtain an AD value. Compared with the prior art, the AD sampling device and the AD sampling method provided by the invention have the advantages that the resolution of AD sampling can be improved without externally arranging other devices and circuits, and the acquisition requirement of analog signals with relatively high precision can be met.

The invention discloses a PM10 single-stage atmosphere sampling cutter. The PM10 single-stage atmosphere sampling cutter is approximately cylindrical, and comprises a cutting hole cap layer, an impact nozzle layer, an impact plate layer, a filter membrane collection layer, a gaseous organic pollutant collection layer and a gas outlet layer, wherein the cutting hole cap layer, the impact nozzle layer, the impact plate layer, the filter membrane collection layer, the gaseous persistent organic pollutants (POPs) collection layer and the gas outlet layer are sequentially connected in series in a sealed manner; the impact nozzle layer comprises impact nozzles and impact nozzle plates; the impact nozzles are arranged at equal intervals and are vertically inserted into the impact nozzle plates to form a circle; 6 to 8 tubular impact nozzles are arranged; and the impact plate layer is provided with impact plates which are annular grooves. By the PM10 single-stage atmosphere sampling cutter, the characteristic of middle and small flow of the conventional air sampler is broken, the PM10 single-stage atmosphere sampling cutter with a 300L / min flow design standard can meet POPs sampling requirements, the cut particle size is accurate, and target particles are cut by inertial impact force and are accurately layered.

The invention discloses a device for intelligently monitoring and ensuring the normal operation of equipment based on an IMF module, which includes a waterproof air inlet, the waterproof air inlet is installed on a first cutting head, and the first cutting head is provided with a cutting head The front cover and the rear cover of the cutting head, the first cutting head is installed above the first separation chamber, the first separation chamber is connected to the dehumidifier through a pipeline, and the second cutting head is installed below the first separation chamber , the second cutting head is installed above the second separation chamber, and an impact chamber is arranged in the second separation chamber. The present invention adopts the flow rate design standard of 300L / min to meet POPS sampling requirements; the airflow at the air inlet is uniform, the flow rate is stable, and it can be waterproof. The collected airflow is more stable and uniform, which meets the principle of fluid dynamics; the cutting particle size is more accurate, and the target particles in the air can achieve the goal of precise stratification under the inertial impact force cutting.

The invention discloses an air particulate matter sampler capable of automatically changing a membrane. The air particulate matter sampler comprises a shell, a filter membrane storage mechanism, a lifting clamping rotation mechanism, a detection mechanism and a control device, wherein the filter membrane storage mechanism, the lifting clamping rotation mechanism, the detection mechanism and the control device are arranged inside the shell; the filter membrane storage mechanism comprises a to-be-detected filter membrane base and a detected filter membrane base which are arranged on an inner plate of the shell; the lifting clamping rotation mechanism comprises a lifting gear, a clamping device and a rotating device; the lifting gear is arranged on the inner plate of the shell; the clamping device and the rotating device are arranged on the lifting gear; the control device is connected to the detection mechanism and the lifting clamping rotation mechanism. By adopting the air particulate matter sampler, artificial membrane exchange is replaced by mechanical movement through multi-freedom motion of a mechanical structure, the long-term sampling requirements are met, and the labor intensity of a worker is greatly reduced, each filter membrane is automatically sampled by the system, the air particulate matter sampler is free of manual intervention, a user can know the working state of the machine in real time by remote control and monitoring, short message inquiring and notifying functions, an unattended operation is really achieved, and the air particulate matter sampler is reasonable in design, compact in structure, light in weight, good in portability and applicable to outdoor work.

The invention relates to a non-invasive system and method for simultaneously collecting aerosol and gas exhaled by a human body, the system comprises a breathing mask and a sound monitoring device, the breathing mask is communicated with a main gas path through an exhaled sampling channel, and the sound monitoring device is used for detecting the loudness of a sampled person and sending the loudness to a control device; the biological aerosol counter is installed on the exhaling sampling channel and sends the detected quantity and concentration of the biological aerosol in the exhaling sampling channel to the control device; the gas inlet of the aerosol collecting module is communicated with the gas outlet of the main gas path, and the gas outlet of the aerosol collecting module is communicated with the gas collecting module; the control module is used for sending a reminding signal to the reminding module when the concentration of the biological aerosol is lower than a preset concentration and the loudness is lower than a preset loudness; the control device is used for accumulatively calculating the number of the biological aerosols of the biological aerosol counter in the detection process and estimating the total sampling time according to the accumulated number of the biological aerosols, the sampled time and the total collection number of the target biological aerosols.

The invention relates to a gas remote monitoring and alarming method, system and device in the tunnel construction process and a computer readable storage medium, and belongs to the technical field of communication. The method comprises the following steps: respectively comparing the current gas concentration collected by each monitoring point with a preset concentration threshold value; judging whether the current gas concentration of each monitoring point is greater than or equal to a preset concentration threshold value, if so, acquiring position information of the monitoring point, and sending a first alarm signal according to the position information of the monitoring point; and if not, calculating a concentration difference value between the current gas concentration of the monitoring point and a preset concentration threshold value, determining a corresponding preset sampling frequency according to the concentration difference value based on a preset mapping table, and updating the current sampling frequency corresponding to the monitoring point to the preset sampling frequency, wherein the preset mapping table comprises corresponding relations between multiple groups of concentration difference value intervals and preset sampling frequencies. The method has the effect of improving the adaptability.

The invention relates to the technical field of biological analysis, and particularly discloses a sampling device and a sample analyser, the sampling device at least comprises a sampling assembly and a suction assembly, the sampling assembly comprises a sampling needle and a sampling pipeline, and the suction assembly comprises a first suction unit and a second suction unit, the first capacity of the first suction unit is smaller than the second capacity of the second suction unit; wherein the sampling needle is communicated with the first suction unit through the sampling pipeline, the first suction unit is selectively communicated with or not communicated with the second suction unit, and the sampling assembly is used for being matched with the first suction unit to suck a first volume of sample liquid; or the sampling assembly is used for being matched with the first suction unit and the second suction unit to suck a second volume of the sample liquid, the first volume is smaller than the first capacity, and the second volume is larger than the first capacity. By means of the mode, the situation that the actual sampling amount is non-constant during small-dose or micro-sampling operation can be avoided, and the requirements for accuracy and repeatability are met.

Embodiments of the present invention disclose a multi-power segment voltage and current sampling method, device and system. The method is applied to a voltage and current sampling circuit, wherein the voltage and current sampling method includes, if a voltage and current sampling request is received, analyzing the voltage and current sampling request to obtain the input voltage and current signals and the rated voltage and current level of the inverter; select the matching preset voltage and current gear by controlling the adjustment unit, so that the first operational amplifying unit receives the obtained voltage and current signals and outputs the corresponding first an output voltage; converting the first output voltage into a first digital voltage signal; determining the corresponding compensation coefficient according to a preset compensation coefficient table, so that the microprocessor calculates according to the compensation coefficient, the first digital voltage signal and the preset calculation rule A second digital voltage signal within a preset digital voltage range is obtained. The embodiments of the present invention can realize voltage and current sampling of multiple power sections, reduce maintenance pressure, and save costs.

The invention relates to a tube orifice diameter variable plug-in sampling instrument which structurally comprises conical tubes, straight bobbins, a steady flow buffer tube, a core tube, a diversion pressure regulating valve, a pressure gauge, a sampling hose, a concentric flow regulator and the like. The instrument changes the composition, the structure and the operating principle of the original organic polluted water sampling device, has the characteristics of small size, light weight, wide application scope, convenience in carrying and mounting, simplicity in operation, safety in use, prevention of a pollution link in a collection process of the sample and the like, improves the fidelity of the collected sample, lowers the collecting cost of the sample, and ensures the safety of personnel and equipment, and the universality of the sampling instrument is improved.