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 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 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 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 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.